Two-side driving balance type low-speed large-torque axial plunger motor

Abstract

The invention discloses a two-side driving balance type low-speed large-torque axial plunger motor which comprises a transmission shaft, wherein a motor shell consists of a front shell and a rear shell; an oil inlet and an oil outlet are formed in the motor shell; a flow distribution disk, a cylinder body and an inclined disk are arranged in the motor shell; one end of the transmission shaft penetrates through the front shell and the flow distribution disk and is connected with the cylinder body in a transmission manner; a plurality of external discharging plunger holes are formed in the cylinder body and are arrayed in the circumferential direction of the cylinder body; external discharging springs and external discharging plungers are arranged in the external discharging plunger holes; one end of each external discharging spring is connected with the bottom end of the corresponding external discharging plunger, and the other end of each external discharging spring is connected with the inner wall of the corresponding external discharging plunger hole; the top ends of the external discharging plungers are in contact with the surface of the inclined disk through external discharging sliding shoes; first waist-shaped oil window holes corresponding to the external discharging plunger holes are formed in the flow distribution disk. The two-side driving balance type low-speed large-torque axial plunger motor is steady during starting; under low speed and large torque, the phenomena of creeping, shaking and the like can be avoided.

Description

technical field [0001] The invention relates to the technical field of axial piston motors, in particular to a dual-side drive balanced low-speed high-torque axial piston motor. Background technique [0002] As an actuator that converts hydraulic energy into mechanical energy, the hydraulic motor undertakes the function of outputting mechanical energy matched by mechanical equipment in the hydraulic system. Due to its compact structure, high working pressure and high volumetric efficiency, axial piston motors are widely used in aerospace, construction machinery, plastic machinery, metallurgy, machine tools and agricultural machinery and other fields. Axial piston motor is a kind of hydraulic motor with high technical content. It has complex structure, various varieties, complex manufacturing process and high processing requirements. In today's situation where the structure and technology of many hydraulic components are relatively stable, the axial piston motor is still dev...

AI Technical Summary

Problems solved by technology

[0004] 1. The output torque and speed of the axial piston motor always have pulsation: the pulsation of torque and speed is the root cause of pressure fluctuation, vibration and noise, and it is also a common problem in positive displacement hydraulic components. Axial piston motor The pulsation of the output torque and speed can be reduced to a certain extent through the reasonable arrangement of the plungers and the selection of the number of plungers. For radial piston motors, the optimal design of the guide rail curve can be used in theory. Completely eliminate the torque and speed pulsation caused by its own structure. Since the torque and speed pulsation of the axial piston motor comes from its structure itself, it can only be reduced by reasonable measures. Based on the characteristic structure of the existing axial piston motor, it is very difficult It is difficult to completely eliminate its pulsation;

[0005] 2. There is a gap between the low-speed stability of the axial piston motor and the radial piston motor under high torque: In view of the structural characteristics of the axial piston motor, it is not easy to be stable when starting and running at low speed, often accompanied by crawling and intermittent stop phenomenon , has an adverse effect on the working performance and life of the equipment, and seriously restricts the range of use of the axial piston motor. There are two internal reasons: one is that the displacement of the axial piston motor pulsates with the change of the rotation angle , the second is that the friction resistance moment presents a negative resistance when the speed decreases;

[0006] 3. The key components of the axial piston motor, such as the distribution plate, the swash plate, and the axial hydraulic pressure on the cylinder body are unbalanced: when the axial piston motor is working, one side of the distribution pair is fed with high-pressure oil, and the other side Excluding low-pressure oil, the axial hydraulic pressure is unbalanced, causing a certain degree of overturning moment in the cylinder body, which greatly affects the smooth operation of the cylinder body; If the axial piston motor runs at high speed and under heavy load, it will inevitably increase the friction and wear, increase the leakage, reduce the volumetric efficiency, and greatly reduce the working performance and service life; like its torque ripple, the motor mainly The unbalanced axial hydraulic pressure of parts is also caused by its own structure, which is also difficult to eliminate and avoid

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