₦airaland Forum

The submersible pump series design automatic drainage pits, wells and basements, and extract water from rivers and reservoirs from them. Each submersible pump produces 14 m3/hour and 12 m maximum discharge head maximum flow rate
The submersible pump drives a jacket type, and the single-phase AC motor is rated in the range of 0.43 and 1.05 kW. These three sizes are coming, and the water treatment dirt particles can reach a particle size of 10 mm. The pump operation control patent is designed for a magnetic float switch for a housing that does not pass through the fixed operation. Therefore, it is tight, wear-resistant, and protected against overwinding, Kesby said. A locking disc can be installed on the submersible pump to start and stop the pump through an external control system. For mobile use the pump's 10m power cord is provided.
The submersible pump series are made of plastic casing, making it lighter. The shell is corrosion-resistant, sound-absorbing, and impact-resistant, and is a stable handle design.
Related products:
Vacuum pumps for beekeeping
How to use negative pressure vacuum pump
Drying Equipment For The Dye Industry
Conductive Dryer Types Of Introduction

The plunger pump is an internationally renowned hydraulic brand with hydraulic pumps such as Rexroth, Vickers, Denison, etc. It has many advantages, but even if it is a plunger pump, it is inevitable that some accidents and problems will occur in daily use. Failure, before encountering a failure, the plunger pump should be checked and maintained regularly. At the same time, after a failure, it should be checked and diagnosed in a timely manner.



Next, we will introduce the diagnosis process of the piston pump repair.

, After the accumulator is filled with gas, all parts must not be disassembled or loosened.



3. The compressed gas charged into the accumulator should be discharged first, and then the accumulator should be transported or disassembled.



4. If the gas pressure drops by more than 0.5MPa, check for gas leakage. When the gas is initially installed, check once a week and then once a month.

5. We need to know that inclined or horizontal installation will cause the airbag of the accumulator to contact and wear out the casing, which will affect the service life of the accumulator. Therefore, the accumulator is generally installed vertically with the oil port downward.
Related products:
Tool Cryocooler Tempering Furnace
Hard Alloy Cryogenic Tempering Furnace
Vacuum Brazing Machine For PCD Diamond Tools
Other related products:
Liquid Ring Vacuum Pump

Dry screw vacuum pump

Oil Diffusion Vacuum Pump

As an enterprise specializing in the production of sludge pump and sludge pump, we have produced high-quality products, but if we can't sell them, no one knows the excellence of our products, our production will be meaningless, so how to sell our products is a problem we need to solve.
In the present era, products are never lacking. What is lacking is the market. To sell products, we need marketing, and sales is a part of marketing. For example, selling sludge pump, how to sell to customers, we should pay attention to a strategy. The process of sales is also a process of interpersonal communication. Through this, your interpersonal network and the amount of information will be more and more large, which provides a huge market opportunity for your sales. Sales should pay attention to methods and strategies, not reckless, be good at summarizing, learn sales skills, understand the hearts of customers, where are the real needs of customers? Only really understand the customer, can we better communicate with him, meet his needs, and then sell the product to him.

Related products:

What Are The Commonly Used Heating Methods Of Drying Tunnel Furnace?What Are The Commonly Used Heating Methods Of Drying Tunnel Furnace?

Vacuum Tube Furnace In Notes For UseVacuum Tube Furnace In Notes For Use

Vacuum Brazing Machine For PCD Diamond ToolsVacuum Brazing Machine For PCD Diamond Tools
Other related products:

Liquid Ring Vacuum PumpLiquid Ring Vacuum Pump

There are several stages in the operation of a well furnace:
Furnace installation, exhaust and temperature rise:

1, after the well furnace to the temperature insulation 0.5~1h, make the temperature uniform, into the parts, hanging parts should be more than 10mm gap, to ensure that the gas unblocked.

2, the parts must be placed in the effective heating zone of the furnace tank, the upper end should not exceed the exhaust pipe, the lower end should keep a certain distance from the intake pipe, after installing the furnace exhaust time is about 20~60min.

3. The sample should be placed in three different positions: upper, middle and lower.

4, after the installation of the furnace, should immediately send infiltration agent exhaust (ethanol drops), when the temperature of the furnace to the specified temperature, in the outlet of the exhaust gas, such as the flame does not point, should increase the amount of infiltration agent or timely clean up the pipe pile.

5, the new furnace and the new fixture should be pre-nitriding treatment for 3~5h.

Insulation stage:

1. Check whether the ammonia decomposition rate and flow rate are normal at any time. When the furnace temperature meets the requirements and the ammonia decomposition rate is unstable, adjust the flow rate of ammonia gas, increase the flow rate, reduce the decomposition rate, and increase the decomposition rate.

2. In some nitrification tanks, the ammonia decomposition rate increases during long-term use. In order to stabilize the ammonia decomposition rate, 800~960 C 2~4h denitrification treatment is required after the furnace is shut down.

Furnace cooling:

Parts with high fatigue strength requirements shall be oil-cooled and silver-gray parts shall be required on the surface. Under the protection of ammonia or cracking gas, the lifting tank shall be cooled to 200 C before opening the tank to retrieve the workpiece.
Related products:
Vacuum Brazing Machine For PCD Diamond Tools
Other related products:
Liquid Ring Vacuum Pump

Dry screw vacuum pump

Hydraulic valves are divided into check valves and reversing valves according to their uses. One-way valve: Only allow the fluid to be connected in one direction in the pipeline, and cut off in the reverse direction. Reversing valve: change the on and off relationship between different pipelines. According to the working position of the spool in the valve body, it can be divided into two, three, etc.; according to the number of channels to be controlled, it can be divided into two-way, three-way, four-way, five-way, etc.; according to the spool drive mode, it can be divided into manual, motorized, electric , Hydraulic etc. Figure 2 shows the working principle of the three-position four-way reversing valve. P is the oil supply port, O is the oil return port, and A and B are the output ports leading to the actuator. When the spool is in the neutral position, all oil ports are cut off, and the actuator does not move; when the spool is moved to the right position, P is connected to A, and B is connected to O; when the spool is moved to the left position, P and B are connected Pass, A and O pass. In this way, the actuator can move forward and backward.
Related products:
Vacuum Brazing Machine For PCD Diamond Tools
Other related products:
Liquid Ring Vacuum Pump

Dry screw vacuum pump

Oil Diffusion Vacuum Pump

There are two reasons for the excessive heating of plunger pump, one is the heat generated by machine friction. Because the active surfaces are in the state of dry friction or semi dry friction, the moving parts rub against each other to generate heat. Second, liquid friction heat. High pressure oil leaks into low pressure chamber through various loopholes, and a large amount of hydraulic energy is lost and converted into heat energy. In order to accurately select the clearance between moving parts, oil tank volume and cooler, the signs of excessive heating and oil temperature of the pump can be eliminated. In addition, the blockage of the return oil filter causes the return oil back pressure to be too high, which will also cause the oil temperature to be too high and the pump body to overheat.


The main reasons for oil leakage of plunger pump are as follows: (1) the main shaft oil seal is damaged or the shaft has defects and scratches; (2) the internal leakage is too large, which causes the pressure at the oil seal to increase and the oil seal is damaged or flushed out; (3) the oil drain pipe is too thin and too long, which makes the sealing part leak; (4) the external oil pipe of the pump is loose, the pipe is damaged, and the sealing gasket is aged or pregnant with cracks; (5) The bolt of variable regulating mechanism is loose and the seal is broken; (6) there are sand holes or poor welding in cast iron pump shell.


The service life of plunger pump is related to the usual maintenance, the quantity and quality of hydraulic oil and the cleanliness of oil. It is also an effective way to prolong the service life of the piston pump to avoid the wear caused by the particles in the oil.


When replacing parts in maintenance, we should try our best to use the parts produced by the original factory. These parts are sometimes more expensive than other imitation parts, but the quality and stability are better. If we buy the imitation parts with low price, it seems to save the cost in a short time, but it brings hidden dangers and may cause greater harm to the use of plunger pump.

Other related products:
Roots Vacuum Pump
Piston Vacuum Pump

Selection of Oilfield Water Injection Pump
There are two types of high-pressure pumps commonly used in oilfield water injection pumps, namely centrifugal pumps and plunger pumps. In terms of pressure, a single-stage centrifugal pump cannot meet the requirements of this design, but it can be realized by multi-stage combination. The plunger pump can meet this requirement, but in terms of flow, the plunger pump can only meet the design requirements through multi-cylinder combination, while the centrifugal pump can use the flow of a single impeller.
From the structural analysis, even if the centrifugal pump adopts multi-stage combination, it has the advantages of small size and light weight. The plunger pump (in the case of multiple cylinders) has a large volume and a high weight. In terms of performance, the centrifugal pump can use the more popular mechanical seals, so its leakage is small and the efficiency is high. The plunger pump has serious leakage, especially under high pressure, and its transmission mechanism is not stable under high pressure.
From the analysis of the medium, if the transported medium is clean water, it is more suitable for both pumps, but its leakage is larger than the plunger pump. Of course, if the medium (such as mud) with high viscosity or more impurities is transported, the mud plunger pump is still used in the oil field.
Related products:

Dry screw vacuum pump

Oil Diffusion Vacuum Pump

The plunger pump is composed of many parts, due to the manufacturing error of parts, improper assembly will likely cause vibration and noise of the hydraulic system
Vibration and noise of hydraulic valves hydraulic valve attack noise, due to the variety of valves, application conditions and other detailed conditions are different. According to the cause of its attack can be roughly divided into mechanical sound and fluid sound two categories.
1) the mechanical noise
The large part of the hydraulic valve by the spool, valve body, control parts, fasteners, seals, and so on, he is the process of external force to make the spool movement, spool movement to the corresponding position to change the flow attack, to meet the work of beg. In this process temporary, the valve within the mechanical contact of movable parts attack noise.
2) fluid
Due to the hydraulic valve in the end of austerity, reversing, overflow, so that the flow of liquid in the valve body, direction and back pressure attack of all kinds of innovation, resulting in valve parts and pipe wall vibration, thereby attack noise. According to the cause of the burst pressure vibration, it can be divided into cavitation sound, motion sound, hydraulic impact sound and shock sound. Pipeline vibration and noise this main assumption due to pump, valve and other hydraulic components vibration in the pipeline caused by interaction. Research shows that when the length of the pipeline is exactly equal to half the vibration pressure wavelength integer times, the pipeline will burst into violent high-frequency noise.
In addition, the external source may also cause pipe resonance; When the cross - section of a line dies (expands and cuts sharply, or turns sharply), dui makes its fluid flow innovate, making it turbulent and noisy.
Related products:
GZL Series High Viscosity Lubricating Oil Vacuum Filter
RG Series Coalescing And Separating Oil Filter
Vacuum Brazing Machine For PCD Diamond Tools
Other related products:
Liquid Ring Vacuum Pump

Dry screw vacuum pump

Oil Diffusion Vacuum Pump

Centrifugal pump is a kind of pump that USES the centrifugal action generated when the PR wheel rotates at high speed to change the mechanical energy into the kinetic energy and the pressure energy of water to raise water. It is divided by the number of impeller into a single stage pump (only one impeller) and multistage pump (more than two impeller) : according to the impeller inlet way and divided into single suction pump and double suction pump: single suction pump is a single eagle impeller inlet. Its head height, simple structure, reliable work, but the meteor is small, suitable for mobile drainage and irrigation; The double-suction centrifugal pump takes water from the two sides of the impeller with a flow twice as much as the single-suction pump, but its structure is complex, so it is suitable for the fixed farm drainage station with large flow and high head. Ordinary centrifugal pump needs to discharge the air in the pump shell and inlet pipe before working. For small pump, it is necessary to fill the chestnut shell and inlet pipe with water. For large mercury pump, it is necessary to have special auxiliary equipment to pump air and divert water. Another form of centrifugal pump is self-priming centrifugal pump. At present, there are three kinds of pumps used in agriculture irrigation: single-stage single-suction centrifugal pump, single-stage double-suction centrifugal pump and small-sized self-suction centrifugal pump.
Related products:
ZYD Double Stage Vacuum Oil Filter Features
What Are The Advantages Of A Special Oil Filter For Lubricating Oil
Vacuum Brazing Machine For PCD Diamond Tools
Other related products:
Liquid Ring Vacuum Pump

Dry screw vacuum pump

Oil Diffusion Vacuum Pump

Application: Seawater desalination, chemical treatment, high-pressure low-flow pump, high-pressure cleaning, reverse osmosis water purification,
Water treatment, agricultural irrigation, automatic car cleaning, high pressure chip processing, mining, crude oil production, paper making
• High pressure transfer cutting fluid deep hole drilling machine, machining center and precision grinding processing.
• High pressure filtration and reverse osmosis pressurized transport. • Spray drying particle manufacturing: dyes, pigments, food powder, etc.
• High pressure cleaning: circuit board cleaning, burr processing, ship and vehicle cleaning, etc. • High viscosity liquid conveying: mud, glue, syrup, oil, etc.
Related products:
Vacuum Oil Filter For Industrial Lubricating Oil Dewatering
Why Use Centrifugal Oil Filter To Filter Edible Oil
Vacuum Brazing Machine For PCD Diamond Tools
Other related products:
Liquid Ring Vacuum Pump

Dry screw vacuum pump

Oil Diffusion Vacuum Pump

The plunger pump is a primary equipment in the hydraulic system. It depends on the plunger reciprocating movement in the cylinder block, so that the volume of the sealing operation chamber changes to complete the oil absorption, pressure oil.

Plunger in the cylinder block to reciprocate movement, therefore, it is very large amount of exercise, in the process of work need to bear infinite friction, therefore, the plunger begged high hardness, wear resistance and use life and high precision. Through research, the choice of quenching heat treatment can meet the plunger skill request.


Quenching is a heat treatment skill that heats steel to the critical temperature above Ac3 (subeutectoid steel) or Ac1 (hypereutectoid steel), holds heat for a period of time, makes it all or some austenitized, and then cools it to below Ms (or isothermal near Ms) at a faster rate than the critical cooling rate for martensite (or bainite) modification. Quenching skill is widely used in modern machinery manufacturing industry. The first parts of machinery, especially steel used in automobiles, airplanes, and rockets, are simply quenched.


Inside the machine, all holes of the unit should be covered well. The unit is placed on a foundation with embedded anchor bolts, and a pair of wedge pads are used for correction between the base and the foundation. Calibrate the concentricity of the pump shaft and the motor shaft to allow 0.1mm faults on the outer circle of the coupling road; The vacancy of the two coupling plane shall be ensured to be 2 ~ 4 mm, (small pump to take small value) the vacancy shall be uniform, tolerance 0.3 mm. After connecting the pipe and determining the motor's rolling direction, connect the coupling again and check the concentric shaft again. After 2 ~ 3 hours of practice trial operation of the unit, after final inspection, if there is no adverse phenomenon, the equipment is considered qualified. Check the temperature and oscillation of the bearing in the trial operation process as follows: loosen the coupling shaft, put the horizontal instrument on the pump shaft and the base of the electric oil pump respectively, adjust the wedge cushion, correct the unit level, and properly tighten the anchor bolts to prevent movement. In order to prevent the sundry in the pipeline into the pump, for the pipeline of new equipment, the pump glue should be equipped with filters, the useful section should be greater than the suction pipe section of 2 ~ 3 times.
Related products:
What Should I Do If The Vacuum Oil Filter Leaks
Filter Replacement Of Vacuum Oil Filter
Vacuum Brazing Machine For PCD Diamond Tools
Other related products:
Liquid Ring Vacuum Pump

Dry screw vacuum pump

Oil Diffusion Vacuum Pump

Selection of peristaltic pump TIPS: small details, improve your work efficiency
In the last issue, we talked about the peristaltic pump as a type of equipment for precise fluid transmission. The most basic requirement for the correct selection of products is to meet the flow requirements. There are many factors that affect the flow of the peristaltic pump, such as the viscosity of the liquid, the head, and the nature of the liquid.
Effect of liquid viscosity on peristaltic pump
Fluid viscosity is a very important parameter in pump selection. The flow diagram mentioned in the previous issue refers to the flow curve of water transported at an atmospheric pressure. Viscosity affects pump speed, efficiency, power, etc. When the viscosity of the liquid reaches a certain value, the pumping efficiency will be reduced due to the limited suction capacity of the hose. At the same pump speed, the flow rate of the viscous liquid will be smaller than the flow rate when pumping water. The higher the viscosity, the more the flow rate will decrease.
Related products:
Vacuum Oil Filter For Turbine Oil Of Installation And Test
Power Industry Preferred Oil Filter Equipment: Insulation Oil Vacuum Filter
Other related products:
Liquid ring vacuum pump

Oil Diffusion Vacuum Pump
Dry screw vacuum pump

Function of centrifugal pump press out chamber


What is the function of centrifugal pump extrusion? There are several forms of DP?


Answer: the function of screw pump press out chamber is to correctly guide the liquid into the next stage impeller or to the outlet pipe with minimum loss, and at the same time convert part of kinetic energy into pressure energy.


There are three common types of press out chamber of diaphragm pump

(1) Spiral volute is used to collect liquid gear pump. Kinetic energy into pressure energy

It was done in a diffusion tube.

(2) Radial guide vane, which is fixed outside the impeller outlet

The role of.

(3) Ring type press out chamber, used in multistage pump*
Related products:
Heat Resistant Steel Castings Tools For Machining
Why Do Stripes Appear In Heat Resistant Steel Casting
 
Other related products:
Liquid ring vacuum pump

Oil Diffusion Vacuum Pump
Dry screw vacuum pump

High-pressure pump is to provide high-pressure rotary spraying slurry with high voltage power equipment, is now widely used in building, highway, plumbing facilities construction, but using a high pressure pump, high pressure pump gear frequently, noise, then the high-pressure pump gear in the cause of the noise and how to solve the problem of the noise of the small make up today for you reading.


A, high pressure pump gear noise has the following possible aspects:


(1) Impact of rotary plate on cylinder body, sound of residual volume of gear high pressure pump and pressure oil in exhaust dead gap;


(2) Impact of exhaust valve disc on seat and support parts;


(3) Echoes and bubbles bursting in the box;


(4) Bearing noise;


(5) Noise caused by large amount of gas and oil impact damper;


(6) Others. Such as transmission caused by noise, air - cooled gear high - pressure pump fan noise.


(7) Motor noise, which is a crucial factor.
Related products:
D373h Double Clip Hard Seal Butterfly Valve
D643H Pneumatic Metal Seal Butterfly Valve
Other related products:
Liquid ring vacuum pump

Oil Diffusion Vacuum Pump
Dry screw vacuum pump

The original specification of the commodity, assuming the replacement of another brand, should consult the hydraulic pump experienced personnel look up the table exchange, the intention is to adhere to the accuracy and load capacity of the bearing.


3 three pairs of friction inspection and marking 3.1 piston rod and cylinder hole


Replacement specifications for hydraulic pump components, listed in a variety of vacancies, can be corrected by the following method:


(1) If the cylinder body is inset with copper sleeve, the method of replacing copper sleeve can be chosen for correction. Trim the diameter of a set of plunger rods together, then polish the outer diameter with sandpaper above 1000#. There are three methods of copper sleeve for cylinder equipment: (a) Heating cylinder or cold kneading and interference equipment for copper sleeve; (b) There is a letai adhesive equipment, this way begged copper jacket outside diameter appearance groove; (c) Cylinder hole tapping, copper sleeve outer diameter processing thread, after tu Le Thai glue, screw into the equipment.


(2) The cylinder block and copper sleeve of the melting contact method shall be marked as follows: (a) Grinding rod shall be selected, and the cylinder hole shall be marked by manual or mechanical means; (b) Select a coordinate boring machine and bore cylinder body holes from the beginning; (c) Use reamer to correct cylinder hole.


(3) Select "exterior engineering skills" as follows: (a) Plating skills: plating a layer of hard chromium on the exterior surface of the plunger; (b) Brush plating skills: brush plating information on the plunger surface; (c) Thermal or arc spraying or electrospraying: spraying high-carbon martensite data; (d) Deposition: High hardness alloy powder is deposited on the outer surface of the plunger.


(4) The cylinder bore without copper sleeve data is mostly ductile iron, in the cylinder wall to prepare amorphous film or coating. Because the cylinder bore wall has this particular material, so just adjust to form a hard - hard pair of friction. Assume that blindly grinding cylinder hole, the cylinder hole inner wall of this layer of external data grind out, the construction of friction function will change. The friction pair that has been removed, assuming forced use, will increase the friction surface temperature, plunger rod and cylinder hole attack gluing.
Related products:
High Vacuum Electric Butterfly Valves Are Used In Industrial Automation
Pneumatic High Vacuum Ball Valve For New Energy And Semiconductor Industry
Other related products:
Liquid ring vacuum pump

Oil Diffusion Vacuum Pump
Dry screw vacuum pump

The oil pump motor set is helpful to the operation of the equipment


Shaft seal or case failure can be reduced by drilling a port in the pump / motor housing and installing a transmission line that allows leakage to drain from the pump housing and return the reservoir. The common name for this transmission line is the "pump case drain" line. In the case of failure of hydraulic components, historical analysis is carried out. In the case of pump / motor housing pressure problems, the question we need to ask is "how long has the problem existed?" For example, if it is suspected that the problem is too much pressure on the case, the problem begins, or soon after the pump / motor is commissioned, the problem is "inherent.". Don't be confused by the ambient temperature. If the machine was delivered in the spring and there was a suspected excessive case pressure problem, it could still be a design problem. If the case drain line returns to the hydraulic tank through the heat exchanger, if the heat exchanger is not equipped with a thermostat or bypass valve.


Hydraulic pump or fluid pump is a device that transfers energy from its moving parts to the fluid passing through the pumping equipment. The energy added to the pump replenishes the velocity and pressure of the fluid. The oil pump motor sets help the equipment run and provide the energy needed to push the fluid in the desired direction. As with other equipment or machinery, it is necessary to maintain the hydraulic pump regularly so that its components can operate efficiently. These moving mechanical parts of the pump utilize energy from a specific source, such as electrical power supplied to it in the form of mechanical energy by an electric motor. A hydraulic pump operates in two different ways; the mechanical action of the pump creates a vacuum at its inlet, allowing gas pressure to push fluid from its reservoir to the pump inlet. Second, the mechanical action of the pump carries the fluid to the outlet section and pushes it through the hydraulic system. You should know that the function of the pump will produce fluid flow or movement; the pump will not generate pressure.
Related products:
Electric Center Line Butterfly Valve
Electric Sanitary Butterfly Valve
Other related products:
Liquid ring vacuum pump

Oil Diffusion Vacuum Pump
Dry screw vacuum pump

(1) The main shaft oil seal is damaged or the shaft has defects or scratches;
(2) The internal leakage is too large, the pressure at the oil seal is increased, and the oil seal is damaged or washed out;
(3) The drain pipe is too thin and too long, causing oil leakage at the seal;
(4) The external oil pipe of the pump is loose, the pipe joint is damaged, and the gasket is aged or cracked;
(5) The bolts of the variable adjustment mechanism are loose and the seal is damaged;
(6) The cast iron pump casing has blisters or poor welding.
Related products:
Steel And Aluminum Tow Chains And Plastic Tow Chains
TL Section Steel Tow Chain
 
Other related products:
Liquid ring vacuum pump

Oil Diffusion Vacuum Pump
Dry screw vacuum pump

Fault cause: internal leakage caused by the wrong assembly of the internal parts of the oil pump

Method of elimination: unloading piece and seal ring must be installed into the oil chamber, two shaft sleeve to maintain balance. The elastic force of the guide wire should be able to twist the upper and lower axle sleeves at the same time by a small Angle towards the rotation direction of the driven gear, so that the two machining planes of the main and driven gear sleeves are closely connected. The unloading groove on the shaft sleeve must be installed on one side of the low-pressure cavity to eliminate the harmful closed dead volume generated when the gear meshing; Before pressing into the self-tightening oil seal, the surface should be coated with a layer of lubricating oil, but also pay attention to the oil blocking edge towards the front cover, can not be installed backwards; Before filling the pump cover, a small amount of hydraulic oil shall be poured into the pump casing and the gear shall be meshed by hand
Fault: The hydraulic oil is too dirty

Method of elimination: Clean the system and replace the hydraulic oil.
Fault: The filter of the pump is blocked by dirt and cannot filter oil

Method of elimination: Clean the filter with clean cleaning oil to remove dirt.
Failure reason: the oil level is insufficient, the oil absorption position is too high, and the oil absorption pipe is exposed

Elimination method: Add oil to the oil standard and lower the oil absorption position.
Related products:
Liquid ring vacuum pump

Oil Diffusion Vacuum Pump
Other related products:
EDI Ultra-Pure Water System
Reverse osmosis pure water system

Hydraulic motor disassembly steps
The clearance of each moving pair of hydraulic motor from the factory has been well matched, and the user is not allowed to change parts casually. In general, do not open the motor at will, only in the case of serious failure, we need to agree with the company to open the inspection.
(1) Preparation before opening

Remove the drain plug and drain the oil from the motor housing.

Loosen 5 screws on the pan and remove the pan.

Take out the oil distribution pan, positioning ring, pad, cylindrical pin and double-headed key.

Note: In order to prevent the change of backward rotation in the reassembly, the marks of the same square shall be made on the end face of the output shaft and the oil distribution plate surface.
(2) Sequence of disassembly and installation

Remove the cover, screw the clean screw into the center screw hole of the crankshaft, and lift out the crankshaft.

Remove the clamping ring on the connecting rod.

3. Take out the connecting rod components of the plunger body, and make corresponding marks one by one, so as to ensure the original assembly clearance during reassembly. If necessary, the combination of the plunger body and connecting rod can be decomposed again: loosen the hole with the spring retaining ring, take out the retaining ring, and the plunger body and connecting rod can be separated.

4. Assemble according to the opposite procedure above, and pay attention to ensure the axial clearance of the bearing.

All parts must be cleaned before assembly to prevent scratch or scratch any working surface.

If there is only oil leakage in the sand hole of the plunger sleeve or oil leakage in the joint surface of the plunger sleeve and the shell, loosen the screws on the plunger sleeve, remove the plunger sleeve, and replace the plunger sleeve or "O" ring.
Related products:
Ultrafiltration System For Water Purification
Fully Automatic Water Softener


Other related products:
Vacuum pump price list

Basic vacuum pump selection

Vacuum pump selection

Vacuum pumps types of industrial

What are the important reasons for the durability of quantitative piston pump


The submergence of the pump below the surface of the downhole fluid plays an important role in determining the efficiency of the type of plunger pump commonly used in well service. When not fully submerged, the pump will provide less than half of the theoretical plunger displacement. In many cases, since the operator cannot maintain proper submergence on the pump, it is likely to produce only half of the capacity they can produce.


This paper describes the conditions inside and around the fixed displacement piston pump when it is running in the well. These conditions affect the effect of submergence on the pump efficiency. It also provides a conclusion indicating the approximate submergence, and emphasizes the necessity of understanding the working level of the pump well. The theoretical conception of the factors affecting the efficiency change of the pump caused by submergence, unless immersed in the well fluid, the plunger pump relies on the oil supply under the suction of the rising plunger, which is enough to pump out the oil supply enough to fill the working cylinder, through the restricted hole at the standing valve and lower plunger screw nut. The hydrostatic head needs to be generated in the oil level of the vertical valve by immersion.


Quantitative piston pump is always the pillar of sewage treatment plant design. An important reason for the durability of the application is that the pump design has been successful in dealing with difficult to pump sludge flows, and the pump design allows the implementation of often unstable maintenance and maintenance procedures in many municipal services. Botany. Although no equipment can operate without maintenance or significantly exceeding the design parameters, in most cases, the simple and basically robust design of the plunger pump will "forgive" poor maintenance and periodic overpressure and load conditions without failure. Proper maintenance and application of dividends have an extremely long service life, in some cases, as long as continuous operation for many years.
Related products:
Liquid ring vacuum pump

Oil Diffusion Vacuum Pump


Other related products:
How Long Can Pressure Vessels Normally Be Used?
What Are The Types Of Pipe Supports For Pressure Vessels?

How the hydraulic pump works
Hydraulic pump is the power component of the hydraulic system, is driven by the engine or motor from the hydraulic oil tank suction fluid, constitute the pressure oil discharge, sent to the implementation of a component. Hydraulic pump according to the structure is divided into gear pump, plunger pump, vane pump and screw pump. Below small make up for us to introduce the variety of hydraulic pump and hydraulic pump operating principle.
1, gear pump: small volume, simple structure, the cleanliness of the oil begged not strict, the price is cheaper; But the pump shaft by the unbalanced force wear severe leakage.
2, vane pump: divided into double action vane pump and single action vane pump this pump flow uniformity, smooth operation, small noise, pressure and volume power than the gear pump high, structure than the gear pump messy.
3, plunger pump: high volume power, small leakage, can work under high pressure, mostly used for high-power hydraulic system; But the structure is messy, materials and processing precision begged high, expensive prices, the cleanliness of the oil begged high.
Pump is a kind of energy conversion equipment, the motor for the rotation of mechanical energy for hydraulic energy output. Hydraulic pump is based on the principle of sealing volume changes to carry out the operation, so it is generally called positive displacement hydraulic pump, is a single plunger hydraulic pump operating principle diagram. In the figure, the plunger 2 installed in the cylinder block 3 to form a sealed volume A, the plunger under the action of spring 4 has always been pressed on the eccentric wheel 1. The prime mover drives the eccentric wheel 1 to rotate the plunger 2 to reciprocate, making the size of the sealing volume A to change periodically. When a grows from small to large, some vacuums are formed, making the oil in the oil tank enter the oil chamber A through the suction pipe jacking open the check valve 6 under the action of atmospheric pressure and end the oil absorption. On the contrary, when a changes from large to small, the full oil in a cavity will head open the check valve 5 and flow into the system to end the oil pressure. So the hydraulic pump will be the prime mover input mechanical energy into the liquid pressure energy, the prime mover drive eccentric wheel rotation, the hydraulic pump will continue to absorb oil and pressure oil.
Related products:


Liquid ring vacuum pump

Oil Diffusion Vacuum Pump


Other related products:
Variable Frequency Constant Pressure Water Supply Equipment

No Negative Pressure Water Supply Equipment

How to improve the working efficiency of high pressure pump
High pressure pump is mainly a kind of equipment to provide high pressure power, in our life is very widely used, especially in some high floors, long pipeline transportation, groundwater collection and so on. However, high pressure pump in a long time after use, easy to appear pressure shortage, low work efficiency and other problems, seriously affect the efficiency of use. So, what method can solve the problem of low working efficiency of high pressure pump? Let's take a look.
1. Improve the finish of the high-pressure pipe

The realization of this phenomenon requires us to clean the pipe wall, make the high-pressure pipe smoother, effectively reduce the friction between the pressure and the pipe wall, and increase the amount of pressure entering.

2. Transformation of high-pressure pipes

It may be that the high pressure pipe before is too thin, resulting in pressure can not be completely into the high pressure pump, resulting in the material conversion failed to achieve the desired effect. We thicken the high-pressure pipe to expand the pressure entry area.

3. Improvement of high-pressure pump nozzle

In the high pressure pump nozzle exit to reduce the chamfering radian, to avoid should flow too fast influence pressure injection quality, after reasonable improvement, for the high pressure pump efficiency to improve greatly.

4. Shorten the length of pipe wall

For the unnecessary pipe wall in production, we can properly reduce, too long pipe will affect the air circulation, remove the excess pipe wall can improve the work efficiency of high pressure pump.

5. Do good maintenance

If you want to improve your work efficiency, maintenance is essential. Good maintenance, not only can prolong the service life, reduce economic costs, but also can solve the problem of low efficiency.

Although, high work efficiency can bring good economic benefits, but, if there is no reasonable transformation of the high-pressure pump will bring the opposite effect. So, it has to be done in a certain way.
Related products:
Liquid ring vacuum pump

Oil Diffusion Vacuum Pump


Other related products:
Transformer Cooling System Of Working Principle
Water Cooling System Structure

Daily maintenance technology of high pressure water pump


1： Vibration during operation

1. Unstable pipeline support and loose foundation bolts of high-pressure water pump are the common causes of vibration. It is necessary to tighten all bolts to prevent loosening.

2. If there is gas in the liquid, carefully check whether the connecting bolts on the sealing surfaces of the high-pressure water pump and water inlet pipeline are loose, whether the sealing gasket is damaged, and whether the pump body and pipeline system parts are damaged.

3. If the high-pressure water pump is not concentric with the motor shaft, it should be adjusted. If the rotating belt is too loose or the joint is not in good contact, it will also cause vibration. When the impeller of high-pressure pump is running unevenly, it is easy to form vibration due to wear of impeller or blockage of individual impeller channel, and sometimes vibration is caused by poor balance of impeller due to shaft bending.

2： Noise increases during operation

Bearing noise: the sound source of the bearing device, the iron bar or screw driver is used to support the bearing device part, and the ear is used to listen, which is a clattering sound.

Motor noise: it's a howling noise. You can only change the motor.

Cavitation noise: sound source in the pump cavity, crackling sound.

3. Hot motor

If the outer wall of the motor is hot, it may run over current. You can close the outlet valve and adjust it to run within the rated current. It may also be the quality problem of the motor coil, so the motor can only be replaced.

The rotating parts show friction, friction resistance increases, and the motor may be hot due to over current. Therefore, stop the machine to check whether the rotor is sensitive.

The bearing of the motor is heated, and the bearing may be short of oil or damaged. It needs to be repaired or replaced.

The working voltage is too low. Check the circuit and adjust the voltage.

No water flow after start-up: there is air in the pump or air accumulated in the inlet pipe, or the bottom valve is not closed tightly, the water supply is insufficient, the packing of vacuum pump leaks seriously, and the gate valve or flap valve is not closed tightly.
Related products:
How To Improve The Impeller Of Centrifugal Fan

How To Maintain The Main Parts Of The Fan To Ensure Production?


Other related products:
Liquid ring vacuum pump

Oil Diffusion Vacuum Pump

Analysis of several common faults and causes in the use of axial piston pump


After working for a long time, or improper operation and maintenance, the axial piston pump often fails. Now Hengyu hydraulic briefly introduces several common failures and causes analysis of the axial piston pump.


1. Insufficient output flow or no oil at all: large suction resistance or air intake; poor bearing capacity of shaft; damage of return spring or return plate; dirt between port plate and cylinder block; damage of plunger or plunger plug hole; wrong position of variable mechanism; too high oil temperature; poor assembly.

2. The pressure is not raised or not at all: the above-mentioned insufficient flow may be caused; the variable mechanism is not adjusted properly; other reasons.

3. Large pump noise and pressure fluctuation: air intake; inflexible movement of variable piston; too small angle of triangular groove; small rigidity of variable mechanism; loose fit of sliding shoe and ball head; large leakage of variable mechanism.

4. Pump heating and high oil temperature rise: the piston and plug hole, the junction surface of port plate and cylinder block are worn, with large leakage; the movement pairs in the pump are seriously worn and roughened, with low mechanical efficiency; the pump has small eccentricity or low working pressure; the oil viscosity is large, the oil tank volume is small; the bearing is worn, and the transmission is stifling.

5. Serious oil leakage of leaking oil pipe (internal and external leakage): wear of cylinder block and port plate, plunger and plug hole; wear of variable piston, resulting in leakage; damage of joint seal; oil leakage of oil seal.

6. Pump can not rotate: plunger stuck; slide shoe off; ball head broken; return disk broken; cylinder and port plate sintering;

7. Variable mechanism failure: the arc surface of variable head bearing bush is seriously worn; the control oil channel is blocked; the variable piston is stuck; the control valve spring is damaged; the variable mechanism leaks

8. Wear or burn out of mating surface between port plate and cylinder body: dirty oil; no oil in the pump during startup; insufficient hardness of port plate; poor material of cylinder body; high temperature and high pressure deformation of port plate; poor coaxiality of bearing hole and transmission shaft in pump housing; too large mating clearance between cylinder body and bearing; too small clearance between drive shaft spline mating; the valve plate and rotation center are not vertical; the transmission shaft is bent; matching The high and low pressure transition area of the flow plate is seriously trapped in oil.

9. Wear or burn out of joint surface of slipper and swashplate: oil pollution; plug of damping hole of plunger or slipper; insufficient hardness or machining accuracy of swashplate; inconsistent thickness of slipper shoulder; insufficient accuracy of hydrostatic bearing on slipper surface; small plane of plunger ball head.
Related products:
Liquid ring vacuum pump

Oil Diffusion Vacuum Pump


Other related products:
How To Choose High Temperature Trolley Furnace

How To Ensure The Stability Of ADI Castings In Isothermal Quenching Furnace