A rotatable split axial piston pump distribution plate with an outer seal

Abstract

The invention discloses a split axial plunger pump flow distribution plate with a rotatable outer sealing belt. The flow distribution plate is divided into an inner fixed plate and the outer rotatable sealing belt surrounding the circumferential face of the inner fixed plate, and the inner fixed plate and the outer rotatable sealing belt are connected movably through a sliding bearing. A low-pressure arc through groove and a high-pressure arc through groove are formed in the two sides of the end face of the inner fixed plate respectively, and an upper blind hole and a lower blind hole which are not symmetric are formed in the ring faces between the low-pressure arc through groove and the high-pressure arc through groove. An annular boss is arranged on the inner ring of the outer rotatable sealing belt, and a plurality of dynamic pressure supporting grooves are formed in a half of the end face of the annular boss. The peripheral face of the outer ring of the outer rotatable sealing belt is of a worm gear structure, and a worm gear is meshed with a worm outside the outer rotatable sealing belt to drive the outer rotatable sealing belt to rotate. According to the split axial plunger pump flow distribution plate, the position of the dynamic pressure sealing belt can be adjusted according to the changes of displacement, the rotating speed and the pressure of a plunger pump, so that the overturning degree of a cylinder body of the plunger pump is the minimum, direct metal contact between the cylinder body and the flow distribution plate is effectively avoided, and energy consumption at the auxiliary flow distribution position is reduced especially when the plunger pump runs in the state with the high pressure and a high rotating speed.

Description

technical field [0001] The invention relates to a flow plate of an axial plunger pump, in particular to a flow plate of an axial plunger pump with a rotatable and split outer seal. Background technique [0002] Axial piston pumps have been widely used in industries, especially aerospace and other industries, because they can realize various variable forms and can work reliably under high pressure and high speed conditions. In recent years, with the development of the hydraulic system in the direction of high power, the power density and efficiency of the hydraulic system are required to be higher and higher. It is bound to require the axial piston pump to further increase the pressure and speed, and adjust the output pressure, displacement and The speed can be matched with the load power in real time. [0003] One of the prerequisites for the axial piston pump to work reliably and efficiently under various working conditions is that each main friction pair such as plunger p...

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Problems solved by technology

[0004] However, when the working conditions change in a wide range, when the swash plate inclination, speed, and pressure of the axial piston pump are adjusted in a wide range, the magnitude and direction of the overturning moment of the cylinder block also change in a wide range, especially when the pump is working at a high speed. When the displacement is large, the overturning moment caused by the centrifugal force of the plunger increases sharply (the direction of the overturning moment is different from the direction of the traditional overturning moment), and the optimal oil film design obtained at the design point is not suitable for the new working conditions, and even the cylinder Severe overturning, direct metal contact between the distribution pair, resulting in component damage

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