A double-pump axial variable displacement piston pump

Abstract

The invention relates to a dual-pump type axial variable displacement plunger pump, comprising a cylinder body oil drain port, an oil distribution disc oil port and a casing oil port, wherein the cylinder body oil drain port comprises multiple first cylinder body oil drain ports and multiple second cylinder body oil drain ports, which are uniformly arranged at intervals, and the number of the first cylinder body oil drain ports is the same with the number of the second cylinder body oil drain ports; the oil distribution disc oil port comprises a first oil distribution disc oil port, a second oil distribution disc oil port and an oil suction port, and the radial width of the oil suction port accommodates the first cylinder body oil drain ports and the second cylinder body oil drain ports; the casing oil port comprises a first casing oil drain port, a second casing oil drain port and a casing oil suction port; the first casing oil drain port is communicated with the first cylinder body oil drain ports through the first oil distribution disc oil drain port, the second casing oil drain port is communicated with the second cylinder body oil drain ports through the second oil distribution disc oil drain port; and the casing oil suction port is communicated with the oil suction port. The dual-pump type axial variable displacement plunger pump solves the technical problem that the dual-pump structure is high in cost and low in control precision, and is high in dual-pump equal-flow control precision.

Description

technical field [0001] The invention relates to an axial variable displacement plunger pump, in particular to a double-pump axial variable displacement plunger pump. Background technique [0002] At present, the dual-connected axial variable displacement piston pump is realized by connecting two variable displacement piston pumps in series. Although the function of dual pumps can be realized, there are still the following deficiencies: [0003] 1. To connect two plunger pumps in series requires the use of two separate sets of end covers, housings, pump shafts, swash plates, return plates, plungers, sliding shoes, ball joints, cylinder blocks, oil distribution plates and other parts, and the structure is complex ,high cost; [0004] 2. The double pumps in series adopt two sets of variable mechanisms. Under variable working conditions, when the flow output of the double pumps in series is realized, the structure of the control mechanism is complicated, the control precision i...

AI Technical Summary

Problems solved by technology

[0007] In order to solve the technical problems of the existing double-pump structure, such as high cost, low control precision, complex structure, and large axial size, the present invention proposes a double-pump type axial variable piston pump

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