The plunger pump is an important device of the hydraulic system, it is how to use and maintain? Ke Yu machinery Xiaobian help you sum up the following, I hope to help you.

The use of piston pump

Plunger pump cylinder body inlaid copper sleeve, can be used to replace copper sleeve installation. First of all to have a group of plunger rod diameter trimmed to uniform size, with sandpaper polished outer diameter of more than 1000#.

Copper cylinder installed three sets of methods:

(a) the cylinder heating and hot charging or copper set of cryogenic extrusion, assembly interference;
(b) using loctite adhesive assembly, this method requires the surface diameter of copper trench coat;
(c) cylinder hole tapping, thread processing copper sleeve diameter, coating loctite glue, screw assembly.

Melting with the cylinder and the copper sleeve style, installation methods are as follows:

(a) use of ground rods, manual or mechanical grinding method for repair of cylinder bore;
(b) by jigborer, re boring cylinder hole;
(c) with fixed cylinder bore reamer.
(3) the "surface engineering", as follows:
(a) plating: in a layer of hard chromium plated piston;
(b) brush plating: brush the surface of wear-resistant material in the plunger;
(c) thermal spraying, or spraying or electric arc spraying: spraying high carbon martensite wear-resistant materials;
(d) laser cladding: the piston surface cladding of high hardness alloy powder.
(4) no copper sleeve cylinder bore materials are mostly ductile iron, the cylinder wall on the preparation of amorphous films or coatings. Because the cylinder bore wall with this special material, so the friction pair to form a hard - hard matching.

Maintenance of piston pump

Using up fuel supply to the piston, after using 3000h, the operator needs a daily check of the piston pump 1-2 times, check the pump operation sound is normal. If found to decrease the speed of hydraulic cylinder or boring car, you should pump up the disintegration of checks, check whether the impeller edge scratching phenomenon, space within the gear pump is too large. For the self suction type plunger pump, the hydraulic oil in the oil oil shall not be lower than the standard limit, to maintain a sufficient number of hydraulic oil. Cleanliness of hydraulic oil higher, longer service life of hydraulic pumps.

Part of the piston pump is the most important bearing, if the bearing clearance, it can not guarantee that the internal friction of the hydraulic pump three normal clearance, but also undermine the friction pair hydrostatic bearing oil film thickness, reduce piston bearing life. According to the pump manufacturers to provide information, the average service life of bearing for 10000h, more than this value will need to be replaced. The new disassembled bearings, no professional testing equipment is not detected bearing clearance, but to use visual, such as found in roller surface scratches or discoloration, it must be replaced.

In the replacement of bearings, should pay attention to the original bearing the letters and English models, piston pump bearings with large load capacity bearing most of the best to buy the original manufacturer, the original specifications, if the replacement of another brand, they should consult an experienced bearing the staff look-up table of the exchange, the purpose is to maintain the accuracy level and load bearing capacity.

The service life of pump length, and the usual maintenance, quality and quantity of hydraulic oil, oil cleanliness and so on. To avoid the pellet on the piston friction caused by wear, is also an effective way to prolong the service life of the piston pump. The parts should be used in the original production of replacement parts in maintenance sometimes, these parts are imitation parts prices than other more expensive, but better quality and stability, if the purchase price of cheap imitation parts, short term appears to be cost savings, but this brings out the hidden dangers, the use of the piston pump may also cause greater harm

A flat valve plate and valve spherical valve two forms. Spherical flow of friction pairs, the cylinder surface scratches relatively shallow, by grinding means repair; cylinder surface deep groove, should first use of "surface engineering" means filled trench, then grinding, grinding, can not be blind to. Prevent the copper layer thinning or leakage of steel base.