Improved plunger type fluid pump and motor

Abstract

The invention discloses an improved plunger type fluid pump and motor. The improved plunger type fluid pump and improved motor comprises a cylinder body which is arranged on a shaft and with a fluid cavity, multiple plunger piston components which slide in the cylinder body, a variable disc which makes contact with the plunger piston components, a variable mechanism which is connected with the variable disc, and a plunger piston holding device which holds the plunger piston components to separate or restore to make contact with the the variable disc. By means of the improved plunger type fluid pump and improved motor, the problems that the unnecessary power consumption and the temperature rise are caused due to the facts that large flow is still output by the fluid pump and the motor in an occasion and time that working is not needed and the back pressure exists, and the mechanical wear is increased are solved, so that the output flow of the fluid pump and the motor is zero when the working is not needed, and the power consumption in nonworking time is eliminated; friction pieces do not make contact with each other, so that the mechanical friction loss is eliminated, the fluid circulation is stopped, and the unnecessary fluid temperature rise is eliminated.

Description

technical field [0001] The invention relates to the technical field of fluid pumps and motors, in particular to an improved plunger type fluid pump and motor. Background technique [0002] The existing plunger-type fluid machinery includes a plunger pump and a motor. Through the pressing contact between the friction parts of the main friction pair, a certain relative motion is used to form a change in the volume of the fluid chamber to realize the fluid working cycle. The load condition adjusts the flow rate. Usually, the angle of the friction member swash plate (variable disc) (axial plunger structure) or the eccentricity of the stator (which can be called variable disc) (radial plunger structure) is at a greater value under low pressure. The position, the working flow is also large, and the opposite is true in the case of high pressure. In some occasions, when there is no need for fluid mechanical work, the unloading method is generally adopted. At this time, a large flow...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the problem that the fluid pumps and motors in the prior art still output a large flow when they do not need to work, and there is back pressure, causing unnecessary power loss and temperature rise, and increasing mechanical wear. Provide an improved plunger fluid pump and motor that can stop the output flow when no work is needed, reduce system back pressure, reduce power loss and temperature rise, and reduce mechanical wear

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