a plunger pump

Abstract

The invention discloses a plunger piston pump. The plunger piston pump comprises a pump shell, a left end cover arranged at the left end of the pump shell, and a right end cover arranged at the rightend of the pump shell, wherein the eccentric position of the right end cover is rotatably connected with a rotary shaft; a rotor is fixedly mounted on the rotary shaft; the rotor is positioned in thepump shell in the eccentric mode; the peripheral outer side of the pump shell is equipped with an oil inlet which communicates with an oil inlet cavity; a plurality of plunger piston holes which are horizontally through are formed in the rotor; a plunger piston is in sliding connection in each plunger piston hole; an inclined disc assembly is arranged in the oil inlet cavity; a gear pump assemblyis arranged in the pump shell; a right distribution disc is fixedly mounted in the pump shell; a first distribution hole is formed in the right distribution disc; a left distribution disc is fixedly mounted in the left end; and a second distribution hole, a third distribution hole and a fourth distribution hole are formed in the left distribution disc. The plunger piston pump disclosed by the invention is simple in structure, can increase pressure of an oil absorbing cavity of the plunger piston pump, and assists the plunger pistons to absorb oil.

Description

technical field [0001] The invention belongs to the technical field of hydraulic pumps, in particular to a plunger pump. Background technique [0002] Axial piston pump is a hydraulic power component widely used in hydraulic systems, but its self-priming ability is relatively poor. If the inlet supply oil pressure is low during operation, it will easily cause insufficient oil absorption, resulting in cavitation and vibration and noise. The rapid wear of the friction pair in the pump accelerates the failure of the pump and affects the working life of the pump. Therefore, the problem of insufficient oil suction at the inlet of the axial piston pump has a great impact on its stable operation. Contents of the invention [0003] (1) Technical problems to be solved [0004] The purpose of the present invention is to provide a plunger pump that can increase the pressure in the oil suction cavity of the plunger pump and assist the plunger to absorb oil. [0005] (2) Technical so...

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Problems solved by technology

[0002] Axial piston pump is a hydraulic power component widely used in hydraulic systems, but its self-priming ability is relatively poor. If the inlet supply oil pressure is low during operation, it will easily cause insufficient oil absorption, resulting in cavitation and vibration and noise. The rapid wear of the friction pair in the pump accelerates the failure of the pump and affects the working life of the pump. Therefore, the problem of insufficient oil suction at the inlet of the axial piston pump has a great impact on its stable operation.

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