Water hydraulic axial plunger pump provided with pressure-limiting and overflow device

Abstract

The invention provides a water hydraulic axial plunger pump provided with a pressure-limiting and overflow device. The pump comprises a back end cover (1), a valve plate (2), a rotating cylinder assembly (3), a casing (4), a sliding bearing (5), an odd number of plunger and slipper assemblies (6), a return plate (7), a swash plate (8), a mechanical seal (9), a front end cover (10), a shaft (11) and the pressure-limiting and overflow device mounted on the back end cover. By the aid of the pressure-limiting and overflow device mounted on the back end cover, pressure-limiting and overflow functions of a water hydraulic axial plunger pump body are realized; the pressure-limiting and overflow device adopts the mechanical and hydraulic double-damping design, obvious defects of large working vibration, large noise, low pressure adjusting precision, poor working stability and the like of general water hydraulic overflow valves are effectively overcome, and the working stability of a system is improved; meanwhile, the problem that a main valve core cannot be opened due to the fact that a damping hole of a fixedly mounted damper is blocked due to medium pollution and local high pressure is formed in a damping cavity is effectively solved.

Description

technical field [0001] The invention relates to the technical field of displacement pumps, in particular to a water hydraulic axial piston pump with a pressure limiting overflow device. Background technique [0002] In recent years, breakthroughs have been made in water hydraulic transmission and control technology that directly uses water (filtered natural water, including seawater and fresh water) instead of mineral oil as the working medium, and in a wide range of engineering applications, compared with traditional oil Hydraulic transmission has proved to have outstanding advantages such as environmental protection, cleanliness, high efficiency, convenient use and maintenance, and low operating cost. Water hydraulic transmission and control technology has been widely used in high-pressure water atomization, seawater desalination, high-pressure water cleaning, stage drive and control, submersible buoyancy adjustment system, marine engineering and other transmission and con...

AI Technical Summary

Problems solved by technology

[0004] Compared with most reciprocating three-plunger pumps, safety valves are installed as pressure limiting and overflowing devices. The reported water hydraulic axial piston pump bodies have no relevant pressure limiting or overflowing devices, and are used in water hydraulics. In the transmission and control system, safety valves or overflow valves must be installed in the system, resulting in increased costs and difficulties in pipeline design and manufacture; at the same time, it is used to directly replace the reciprocating three-piston pump in systems such as seawater desalination and high-pressure water cleaning. very restrictive

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