A valve plate and plunger hydraulic pump with a buffer mechanism

Abstract

A valve plate and plunger hydraulic pump with a buffer mechanism, the valve plate: including the valve plate body, the valve plate body is symmetrically provided with waist-shaped left and right oil holes outside the shaft hole, and the left and right There are first and second partition areas between the oil holes. The first partition area is provided with a buffer mechanism. The buffer mechanism includes a buffer chamber. The inner end of the buffer chamber communicates with the shaft hole through the communication hole; the plug is installed outside the buffer chamber in a sealed manner. inside of the end; the return spring, the buffer piston, the buffer spring and the buffer plunger are installed in the buffer cavity in sequence; the buffer piston divides the buffer cavity into an outer cavity and an inner cavity, and a damping hole is provided on its axis; the buffer plunger It is a two-stage stepped structure, the large diameter section is set with a sealing ring, and the small diameter section is slidably inserted into the communication hole; the outer cavity communicates with the outside through the oil inlet and outlet holes. Hydraulic pump: adopt the valve plate among the present invention. The distribution plate in the invention can solve the problem of alleviating the trapped oil of the plunger pump, and reduce the vibration and noise of the hydraulic pump.

Description

technical field [0001] The invention belongs to the technical field of plunger pump manufacturing, in particular to a flow distribution plate with a buffer mechanism and a plunger hydraulic pump. Background technique [0002] Axial piston hydraulic pump (referred to as axial piston pump) is a hydraulic component that can convert mechanical energy into hydraulic energy. It has many advantages such as high rated working pressure, large flow rate, and convenient variable adjustment. It is widely used in mobile In technical fields such as equipment and fixed equipment. [0003] figure 1 It is a structural principle diagram of a typical axial piston pump in the prior art. In the figure, the cylinder body 101 is arranged with several circular plunger cavities 109 along the axial direction, and the same number of plungers 102 are built in several plunger cavities 109, and one end of the plunger 102 is connected with the oblique in a suitable manner. The disc 103 keeps in contact...

AI Technical Summary

Problems solved by technology

This will cause trapped oil in this area, which will easily cause pressure fluctuations and noise of the pump

[0004] In the existing technology, the technical problem of oil trapping is usually alleviated to a certain extent by opening damping grooves (damping grooves, eyebrow grooves) or damping holes (damping holes), but this method will To a certain extent, it causes the connection between the oil suction side and the oil discharge side, thereby reducing the efficiency of the pump

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