Axial water pressure plunger pump with easy maintenance

Abstract

The invention relates to an axial water pressure plunger pump with easy maintenance, belonging to the field of water pumps, in particular to an axial water pressure plunger pump with a cylinder body and flat valve seat separate structure. The plunger pump comprises a pump body, a main shaft disk, a cylinder body, a flat valve seat and a rear end cover in sequence, wherein the main shaft disk drives a plunger to make reciprocating movement in the cylinder bore of the cylinder body; a plunger sleeve being in contact with the plunger covers in the cylinder bore; an annular rubber-plastic seal capable of realizing oil and water separation is arranged at the inner side of the plunger sleeve; the upper part in the pump body is lubricated by oil, and the lower part thereof is lubricated and cooled by water; the cylinder body and the flat valve seat are connected by bolts; the cylinder bore in the cylinder body is through front and back; the plunger sleeve and the rubber-plastic seal are arranged in the cylinder bore from the side of the flat valve seat; a tilting tray-sliding boot working structure is adopted in the middle of the main shaft disk; and the main shaft disk is provided with an upper couple disk, a lower couple disk and a balance weight disk. The invention solves the problem that the rubber=-plastic seal realizing the oil and water separation in the high-pressure water pump has serious friction loss and is hard to replace, meanwhile realizes the static balance and the dynamic balance of the main shaft disk and relieves the cylinder body swing caused by the unbalanced quality in the rotation of the main shaft disk.

Description

technical field [0001] The invention belongs to the category of pumps, in particular to an axial hydraulic plunger pump which is easy to maintain. Background technique [0002] As the core component of the hydraulic transmission system, the hydraulic pump is designed and developed, which is the key to the development of hydraulic transmission technology. At present, there are several types of hydraulic pumps commonly used in the world, such as plunger type, vane type, and gear type. In contrast, the vane of the vane pump is in line contact with the stator and the two gears of the gear pump, the contact PV value is high, and the sealing effect is poor; the key friction pairs in the plunger pump (such as plunger / cylinder hole, sliding shoe / swash plate, flow distribution plate / cylinder end face, etc.) are mostly surface contact, and the PV value under the same working conditions is relatively small, which can realize static pressure support, and the sealing effect is good,...

AI Technical Summary

Problems solved by technology

[0006] The invention provides an axial hydraulic plunger pump that is easy to maintain. The distribution valve seat is independent of the cylinder body, and the plunger sleeve is inserted into the cylinder hole from the lower part of the cylinder body, which solves the friction of the rubber-plastic composite seal that realizes oil-water separation in the high-pressure water pump. Severe wear and tear, and difficult to replace. At the same time, the static balance and dynamic balance of the main shaft are realized, which alleviates the cylinder swing caused by the unbalanced mass of the main shaft disk rotation.

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