CN102865206A

CN102865206A - High-speed pump

Info

Publication number: CN102865206A
Application number: CN2012103741020A
Authority: CN
Inventors: 杨莽; 罗丽; 冯晓磊; 刘鸿; 刘猛
Original assignee: PUSH DRIVE CO Ltd
Current assignee: PUSH DRIVE CO Ltd
Priority date: 2012-10-07
Filing date: 2012-10-07
Publication date: 2013-01-09

Abstract

The invention discloses a high-speed pump which comprises a shell (1), a pump cover (2), a pump shaft (3), an inclined disc (4), a sliding shoe (5), a cylinder (6) and a distributing disc (7). The pump cover (2) is mounted at the rear of the shell (1), the pump shaft (3) is penetratingly arranged in the shell (1), the inclined disc (4), the sliding shoe (5), the cylinder (6) and the distributing disc (7) are sequentially mounted on the pump shaft (3), the sliding shoe (5) and the cylinder are in transmission via a plunger (9), the cylinder (6) is connected with the pump shaft (3) by an involute spline, and an impeller (12) is mounted at the rear end of the pump shaft (3) and is connected with the pump shaft (3) by an involute spline. The high-speed pump has the advantages that the impeller and the pump shaft rotate at the same speed, and the pressure of an oil outlet chamber of the impeller is increased along with increase of the rotational speed of the pump shaft, so that oil absorption capacity of the pump in a high-speed state is improved, and cavitation is effectively avoided; and the pump shaft is flexibly connected with the cylinder by the involute spline, eccentric wear of a high-pressure side is eliminated, reliability of the performance of a pump body is strengthened, and the service life of the high-speed pump is prolonged.

Description

A kind of high speed pump

Technical field

The present invention relates to oil hydraulic pump, particularly a kind of high speed pump.

Background technique

As the active force pump in engineering machinery, the industrial system, plunger variable pump has the advantages that volume is large, efficient is high and can be fit to the long-term work of high-voltage high-speed state.Oil absorption is poor, easy to cavitate but existing plunger variable pump exists, the lid of plunger pump is in the situation of the inclination on the lower easy generation flow surface that runs up, cause the flow sea surface oil slick inhomogeneous, produce the phenomenon of high pressure side eccentric wear, affect pumping efficiency and the working life of plunger pump.

Summary of the invention

The object of the invention is to overcome the shortcoming of prior art, the high speed pump that provide a kind of oil absorption of elevator pump, effectively avoid cavitation phenomenon to occur, reliability is high.

Purpose of the present invention is achieved through the following technical solutions: a kind of high speed pump, it comprises housing, be installed in the pump cover at housing rear portion, be located in the pump shaft in the housing and be installed in successively swash plate, piston shoes, cylinder body, thrust plate on the pump shaft, by plunger driving, the swash plate sidepiece is connected with the split bearing of enclosure interior between piston shoes and the cylinder body.

Adopt involute splines to be connected between cylinder body and the pump shaft; The pump shaft front end is supported by fore bearing, and the front end of pump shaft is positioned at outside the housing, is provided with liquid sealing between pump shaft and the axis hole; The other end of pump shaft is supported on the pump cover by rear bearing, and the rearward end of pump shaft is passed bearing and stretched into pump cover inside; On the rearward end of pump shaft impeller is installed, adopts involute splines to be connected between impeller and the pump shaft; The inside of pump cover also is provided with oil sucting cavity, and impeller is positioned at oil sucting cavity.

Described pump cover upper-lower position is respectively equipped with return oil cylinder and variable oil cylinder, the return oil cylinder is communicated with the actuator port of the pump housing, the resetting piston bar is installed in it, is provided with returning spring between resetting piston bar and the pump cover, connect by raising pole between described resetting piston bar and the swash plate top; The variable oil cylinder is communicated with the pressure hydraulic fluid port of the pump housing, and the variable piston rod is installed in it, is provided with lower returning spring between variable piston rod and the variable oil cylinder end, connects by lower dolly bar between variable piston rod and the swash plate bottom;

Have upper ball-and-socket and lower ball-and-socket on the end face of described swash plate, the end of resetting piston bar and variable piston rod all has axis hole.An end that raises pole is arranged in ball-and-socket, and the other end is arranged in the axis hole of resetting piston bar, and an end of lower dolly bar is arranged in lower ball-and-socket, and the other end is arranged in the axis hole of variable piston rod.

The present invention has the following advantages: the synchronized rotation of impeller of the present invention and pump shaft, and the pump shaft rotating speed is higher, and the fuel-displaced chamber pressure of impeller is also higher, thus the oil absorption of pump when having promoted high speed has been avoided cavitation phenomenon effectively; Impeller is built in pump cover, need not compact structure is installed.

Pump shaft and cylinder body adopt the involute splines flexible connection, make cylinder body have certain unsteady ability, cooperate the sphere flow, be conducive to eliminate the inclination on flow surface, the flow sea surface oil slick is even when guaranteeing high speed, eliminate on high-tension side eccentric wear phenomenon, strengthened the reliability of pump housing performance, prolonged the working life of pump.

Description of drawings

Fig. 1 is structural representation of the present invention

Fig. 2 is the structural representation of thrust plate of the present invention

Fig. 3 is the structural representation of impeller of the present invention

Among the figure, 1-housing, 2-pump cover, 3-pump shaft, the 4-swash plate, 5-piston shoes, 6-cylinder body, 7-thrust plate, the 8-split bearing, 9-plunger, 10-fore bearing, the 11-rear bearing, 12-impeller, 13-oil sucting cavity, 14-return oil cylinder, 15-variable oil cylinder, 16-resetting piston bar, 17-raises pole, 18-variable piston rod, 19-lower dolly bar.

Embodiment

The present invention will be further described below in conjunction with accompanying drawing, and protection scope of the present invention is not limited to the following stated:

Such as Fig. 1, Fig. 2, shown in Figure 3, a kind of high speed pump comprises housing 1, pump cover 2, pump shaft 3, swash plate 4, return plate, piston shoes 5, cylinder body 6, thrust plate 7, split bearing 8, plunger 9, resetting piston bar 16, variable piston rod 18, raises pole 17, lower dolly bar 19, upper returning spring, lower returning spring and impeller 12.

Housing 1 front portion has axis hole, and housing 1 rear portion connects pump cover 2, and pump shaft 3 stretches into housing 1 inside from axis hole, and an end is supported by fore bearing 10 and is positioned at outside the housing 1, can be connected with external means, carries out liquid sealing between pump shaft 3 and the axis hole; The other end of pump shaft 3 is supported on the pump cover 2 by rear bearing 11, and the rear end of pump shaft 3 is passed bearing and stretched into pump cover 2 inside.

Housing 1 inner near axis hole and be positioned at pump shaft 3 other the position split bearing 8 is installed, has obvious axis hole greater than pump shaft 3 diameters in the middle of the swash plate 4, swash plate 4 is set on the pump shaft 3 and its front-end face is connected with split bearing 8, so that can swing so that pump shaft 3 axis are symmetrical under split bearing 8 supports, swash plate 4 is ball-and-socket and lower ball-and-socket on ear end face has.

Return plate, cylinder body 6, thrust plate 7 is installed on the pump shaft 3 successively, the front-end face of return plate and swash plate 4 sliding contacts, pass through the involute splines flexible connection between cylinder body 6 and the pump shaft 3, the ear end face of return plate along the circumferential direction is distributed with piston shoes 5, along the circumferential direction be furnished with axial plunger 9 holes in the cylinder body 6, the front portion in plunger 9 holes is provided with plunger 9, the front end of plunger 9 connects piston shoes 5 in the ball pivot mode, the front-end face of thrust plate 7 is for protruding sphere, the ear end face of cylinder body 6 is recessed sphere, protrude sphere and contact cooperation with recessed sphere is mutually interactive, oil sucking window and force feed window are arranged on the thrust plate 7, described oil sucking window and force feed window dock the rear portion in described plunger 9 holes;

Have respectively return oil cylinder 14 and variable oil cylinder 15 in the top and the bottom of pump cover 2, wherein, return oil cylinder 14 is communicated with the actuator port of the pump housing, resetting piston bar 16 is installed in the return oil cylinder 14, and pump cover 2 has the positioning hole that is enclosed within on the resetting piston bar 16, between positioning hole and resetting piston bar 16, be provided with sleeve, the front end of positioning piston bar has flange, upper answer spring housing is on the positioning piston bar, one end of upper returning spring presses on the pump cover 2, and the other end of upper returning spring presses on the flange; The front end of positioning piston bar has axis hole A, raises pole 17 1 ends and is arranged in ball-and-socket, and the other end is arranged in axis hole A.

Variable oil cylinder 15 is communicated with the pressure hydraulic fluid port of the pump housing, variable piston rod 18 is arranged in lower variable oil cylinder 15, be provided with lower returning spring between variable piston rod 18 and variable oil cylinder 15 ends, the end face of lower variable oil cylinder 15 ends has the spring locating slot, the rear end of variable piston rod 18 has location hole of the spring, lower returning spring one end is positioned at the spring locating slot, and the other end of lower returning spring is positioned at the spring locating slot.

Working procedure of the present invention is as follows: pump shaft 3 connects prime mover by transmission device, prime mover drives cylinder body 6 rotations by pump shaft 3, constraint reaction effect because of swash plate 4, the plunger 9 that is positioned at right semi-circle moves inwards in cylinder body 6 plungers 9 holes, the sealed volume of plunger 9 bottoms reduces, and fluid is discharged through the force feed window of thrust plate 7; Be positioned at the plunger 9 of left semicircle to overhanging, plunger 9 bottom volumes increase, and the impeller 12 of the fluid of fuel tank through being connected with pump shaft 3 employing involute spliness is transported to thrust plate 7 and sucked by oil sucking window.Prime mover successively rotates, and pump is oil suction and force feed continuously.

Claims

1. high speed pump, it comprises housing (1), be installed in the pump cover (2) at housing (1) rear portion, be located in the pump shaft (3) in the housing (1) and be installed in successively swash plate (4), piston shoes (5), cylinder body (6), thrust plate (7) on the pump shaft (3), pass through plunger (9) transmission between piston shoes (5) and the cylinder body (6), swash plate (4) sidepiece is connected with the split bearing (8) of housing (1) inside, it is characterized in that:

Adopt involute splines to be connected between cylinder body (6) and the pump shaft (3); Pump shaft (3) front end is supported by fore bearing (10), and the front end of pump shaft (3) is positioned at outside the housing (1), is provided with liquid sealing between pump shaft (3) and the axis hole; The other end of pump shaft (3) is supported on the pump cover (2) by rear bearing (11), and the rearward end of pump shaft (3) is passed bearing and stretched into pump cover (2) inside; Impeller (12) is installed on the rearward end of pump shaft (3), adopts involute splines to be connected between impeller (12) and the pump shaft (3); The inside of pump cover (2) also is provided with oil sucting cavity (13), and impeller (12) is positioned at oil sucting cavity (13);

Described pump cover (2) upper-lower position is respectively equipped with return oil cylinder (14) and variable oil cylinder (15), return oil cylinder (14) is communicated with the actuator port of the pump housing, resetting piston bar (16) is installed in it, be provided with returning spring between resetting piston bar (16) and the pump cover (2), connect by raising pole (17) between described resetting piston bar (16) and swash plate (4) top; Variable oil cylinder (15) is communicated with the pressure hydraulic fluid port of the pump housing, variable piston rod (18) is installed in it, be provided with lower returning spring between variable piston rod (18) and variable oil cylinder (15) end, connect by lower dolly bar (19) between variable piston rod (18) and swash plate (4) bottom;

Have upper ball-and-socket and lower ball-and-socket on the end face of described swash plate (4), the end of resetting piston bar (16) and variable piston rod (18) all has axis hole, an end that raises pole (17) is arranged in ball-and-socket, the other end is arranged in the axis hole of resetting piston bar (16), one end of lower dolly bar (19) is arranged in lower ball-and-socket, and the other end is arranged in the axis hole of variable piston rod (18).