Novel inclined plate type axial plunger pump

Abstract

The invention provides a novel inclined plate type axial plunger pump which comprises a front pump body, a middle pump body, a cylinder body, a rear pump body and a transmission shaft; a mounting inclined hole is formed in the rear pump body; an inclined plate arranged in the mounting inclined hole is rotationally connected with the rear pump body; a steel ball arranged in a steel ball spring seat component in a spline at the other end of the transmission shaft is matched with a pressure plate, and then abuts against the middle part of the pressure plate; a plurality of evenly distributed plunger holes are formed in the end face of the cylinder body; through holes corresponding to hole locations of the plunger holes are formed in the pressure plate; one end of each sliding shoe of a plunger component penetrates through the corresponding through hole, and then is inserted into and is slidingly matched with the corresponding plunger hole; and one end of each plunger of the plunger component is matched with the corresponding through hole in the pressure plate and then abuts against the end face of the inclined plate. A traditional fixed type inclined plate is changed to the rotary inclined plate, and the inclined plate follows the plungers to rotate, so that the friction between the inclined plate and each plunger is reduced, the mechanical efficiency is improved, and the system requirement on the reliability of a hydraulic pump is met. In addition, the plungers and the sliding shoes are designed in the plunger component, so that the assembly difficulty of various parts is reduced.

Description

technical field [0001] The invention belongs to the technical field of pumps for hydraulic systems of railway switch machines, and in particular relates to a novel swash plate axial piston pump. Background technique [0002] With the rapid development of railway technology, the separation of railway switch has changed from manual control to automatic control, which requires that the hydraulic system of the switch machine not only has high reliability requirements in automatic control, but also has high reliability requirements in the event of failure. , the system can be manually switched at low speeds, but the reliability of the original hydraulic pump cannot meet the system requirements. Invention patent application number 201120206690.8 discloses a "piston pump" (hereinafter referred to as document 1). In document 1, the swash plate with hemispherical structure is fixedly installed inside the rear pump body, and the main shaft drives the plunger to make a pump in the cyli...

AI Technical Summary

Problems solved by technology

[0002] With the rapid development of railway technology, the separation of railway switch has changed from manual control to automatic control, which requires that the hydraulic system of the switch machine not only has high reliability requirements in automatic control, but also has high reliability requirements in the event of failure. , the system can be manually switched at low speed, but the reliability of the original hydraulic pump cannot meet the system requirements

Invention patent application number 201120206690.8 discloses a "piston pump" (hereinafter referred to as document 1). In document 1, the swash plate with hemispherical structure is fixedly installed inside the rear pump body, and the main shaft drives the plunger to make a pump in the cylinder bore of the cylinder body. During telescopic reciprocating motion, the plunger and the swash plate are sliding friction, and the friction resistance is large. At the same time, the installation form of the plunger is a cladding structure, which is difficult to install; the invention patent application number 201220064342.6 discloses a "new axial column Plug Pump" (hereinafter referred to as Document 2). In Document 2, the swash plate is fixedly installed in the inner cavity of the rear cover, and the end face of the plunger always touches the end face of the backing plate that is connected with the swash plate. After the main shaft drives the plunger to rotate, the plunger When doing telescopic reciprocating motion in the plunger hole, under the action of the plunger spring, the end face of the plunger always touches the end face of the backing plate, and the plunger is in sliding friction with the backing plate during the rotation process. At the same time, it is located in the plunger hole and The plunger spring connected to the plunger is a vulnerable part, it is difficult to replace, and the failure rate of the plunger pump is high. In summary, it is necessary to improve

Images