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.
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It should be mentioned that not only hydraulic cylinders can be used but also pneumatic ones such as these (their name is pneumatig). From my various tests its even cheaper to use pneumatic ones instead of hydraulic, mainly because they require much less maintenance.