Linear two-way hydraulic pump

Abstract

The invention discloses a linear two-way hydraulic pump. The linear two-way hydraulic pump comprises a pump body with an oil inlet and an oil outlet, wherein the oil inlet communicates with a low pressure cavity and the oil outlet communicates with a high pressure cavity; a flat end cover and a through end cover used for sealing the high pressure cavity are mounted at two ends of the pump body correspondingly; a piston which moves in the axial direction and provides pressure is mounted in the pump body, and a lower piston cover and an upper piston cover used for controlling the flow directionof the hydraulic oil are correspondingly arranged at two ends of the piston; a piston fixing cover is fixed to the outer end of the upper piston cover, fixed with the piston through a bolt, and used for limiting the moving positions of the upper piston cover; the lower piston cover is mounted to the other end of the piston, a piston pull cover is fixed to the outer end of the lower piston cover and fixed to the piston through a bolt; and one end of a pull rod is connected with the piston pull cover, and the other end is connected with a power supply. Oil suction and extrusion are achieved through the reciprocating motion provided by the power supply. Compared with the traditional hydraulic pump, the linear two-way hydraulic pump is simple in structure and light in weight.

Description

technical field [0001] The invention relates to a hydraulic pump, in particular to a linear bidirectional hydraulic pump, which belongs to the technical field of hydraulic pumps. Background technique [0002] The linear two-way hydraulic pump is mainly used in the oil circuit system with a certain back pressure in the fuel tank to provide high pressure and power drive for the system. [0003] Traditional hydraulic pumps mainly include gear pumps, vane pumps and plunger pumps. The gear pump mainly relies on the meshing of the gears to change the volume to achieve oil absorption and oil discharge. Although this type of hydraulic pump has a simple structure, it is heavy and has a lot of vibration and noise. The vane pump mainly relies on the rotation of the impeller, and uses centrifugal force to realize oil suction and oil discharge. Chinese patent CN1834467A has announced a kind of hydraulic pump, and this hydraulic pump mainly has casing, and the impeller supported by rota...

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to overcome the defects of complex hydraulic pump structure, high manufacturing cost and high maintenance requirements, and provide a linear two-way hydraulic pump

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