A plunger type hydraulic motor pump with an internal integrated front pump

Abstract

The invention discloses a plunger type hydraulic motor pump internally integrated with a front-mounted pump. The plunger type hydraulic motor pump comprises a motor rotor, a cylinder body, a plurality of plungers, a swash plate assembly, a distribution valve assembly, a front-mounted pump assembly, bearings and a thrust plate, wherein the two ends of the cylinder body are provided with stepped shafts, the end of each stepped shaft is provided with a water discharging end, a water discharging through hole designed inside each stepped shaft is communicated with a water outlet formed in the corresponding water discharging end, and the two stepped shafts are embedded in the bearings which are distributed symmetrically; the stepped shaft at one end is provided with the thrust plate, and the thrust plate is embedded in a bearing block and the corresponding water discharging end; the front-mounted pump assembly is integrally installed inside a water feeding runner inside one end of the cylinder body, the front-mounted pump assembly is communicated with a plunger cavity through a distribution valve, and working media are discharged out from the two water discharging ends after being pressurized in the plunger cavity. According to the plunger type hydraulic motor pump internally integrated with the front-mounted pump, the heat dissipation performance is excellent, high-speed rotation is achieved, no cavitation is generated, vibration and noise are low, and the working media can be water or oil.

Description

technical field [0001] The invention relates to a motor pump, in particular to an axial plunger hydraulic motor pump with an internal integrated front pump, which solves the problems of insufficient suction performance, heat dissipation performance and single working medium of the motor pump. Background technique [0002] The plunger hydraulic motor pump is a new type of hydraulic power component, which integrates the two independent components of the drive motor and the axial piston pump structurally. Compared with the traditional power component, it has a small size and a It has the advantages of compactness, high power density and no external leakage. [0003] Solving the problems of heat dissipation inside the motor pump, cavitation and vibration when the motor pump rotates at a high speed, and a single working medium are the research directions of technicians in the field of plunger hydraulic motor pumps. The Chinese patent application number 200710305961.3 discloses a...

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Problems solved by technology

[0003] Solving the internal heat dissipation of the motor pump, cavitation and vibration when the motor pump speed is high, and the single working medium are the research directions of technicians in the field of plunger hydraulic motor pumps.

The Chinese patent application number 200710305961.3 discloses a hydraulic motor plunger pump, which integrates a driving motor, a vane pump and a centrifugal pump, wherein the centrifugal pump is the front pump of the motor vane pump. On the one hand, it improves the hydraulic vane The inlet pressure of the pump improves the problems of noise, vibration and cavitation caused by insufficient oil absorption; on the other hand, the front centrifugal pump also enhances the internal oil circulation of the motor pump, which helps heat dissipation to a certain extent. However, The working medium of the pump is single, only suitable for oil, and its heat dissipation capacity cannot meet the requirements of use when the motor rotates at high speed

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