Double-swashplate plunger pump

Abstract

The invention belongs to the field of plunger type motor pumps and specifically discloses a double-swashplate plunger pump. The plunger pump comprises a cylinder, a plunger, a first swashplate component and a second swashplate component and is characterized in that the first swashplate component and the second swashplate component are symmetrically arranged on two end faces of the cylinder, a displacement regulating mechanism is connected to at least one swashplate and comprises a connecting rod component, a piston type hydraulic cylinder and a control valve, the swashplate, the connecting rodcomponent and the piston type hydraulic cylinder are sequentially connected, and the piston type hydraulic cylinder is connected with the control valve. The double-swashplate plunger pump has the advantages that the movement of each piston type hydraulic cylinder is controlled through the corresponding control valve so as to drive the corresponding connecting rod component to move, the connectingrod component drives the corresponding swashplate to move to change the dip angle of the swashplate so as to change the displacement of the plunger pump, flow distribution of the plunger pump is achieved through a flow distribution device, stepless displacement regulation is achieved, and high regulation precision and wide regulation range are achieved.

Description

technical field [0001] The invention belongs to the technical field of plunger type motor pumps, and more specifically relates to a double swash plate plunger pump. Background technique [0002] The plunger pump / motor is one of the most important power components in the hydraulic field, and is widely used in ships, aerospace, automobiles and other fields. The traditional axial variable pump / motor consists of a variable pump with an inclined swash plate and a variable adjustment mechanism. The variable mechanism mostly adopts the structure of a single plunger cylinder, and controls the plunger by changing the swing angle of the swash plate. Changes in pump / motor output displacement. However, in the field of double swash plate axial piston pumps / motors with valve distribution / shaft distribution, few people have proposed variable displacement devices for plunger pumps / motors in the case of two swash plates. [0003] Chinese patent CN102141022B discloses a double swash plate v...

AI Technical Summary

Problems solved by technology

However, in the field of double swash plate axial piston pumps / motors with valve distribution / shaft distribution, few people have proposed variable displacement devices for piston pumps / motors in the case of two swash plates.

[0003] Chinese patent CN102141022B discloses a double swash plate valve flow distribution axial plunger type water hydraulic shielded pump. The invention integrates the water hydraulic pump inside the shielded motor rotor and has a compact structure, which can achieve the purpose of miniaturization and weight reduction, and improves the The mobility of the working machinery solves the problem that the traditional hydraulic power unit is large in size and complex in structure, which easily leads to oil-water mixing in the system. The double swash plate structure and various flow distribution methods adapted to it are used to improve the force of the cylinder body. situation

However, this invention belongs to the category of quantitative pumps, and cannot achieve the variable speed of double swash plate plunger pumps.

[0004] Chinese patent CN104791210B discloses a double swash plate plunger type variable, including housing, left end cover, right end cover, stator core, motor winding, rotor, cylinder, multiple plungers, two swash plate assemblies and multiple flow distribution devices The swash plate assembly includes a swash plate, a plurality of sliding shoes and a return plate, and the two swash plates are respectively a left swash plate and a right swash plate. The invention drives the right swash plate to rotate through a variable adjustment mechanism, so that the right swash plate revolves around the central axis of the cylinder body Rotate a certain angle to change the relative positional relationship between the left swash plate and the right swash plate, and cannot accurately realize the stepless adjustment of the displacement and the adjustment of the speed and steering of the plunger pump

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