CN201433866Y

CN201433866Y - Inclined-shaft hydraulic plunger pump or a motor

Info

Publication number: CN201433866Y
Application number: CN2009200710471U
Authority: CN
Inventors: 李斌
Original assignee: Shanghai Electric Hydraulics and Pneumatics Co Ltd
Current assignee: Shanghai Nabo Tes Hydraulic Co., Ltd.
Priority date: 2009-04-24
Filing date: 2009-04-24
Publication date: 2010-03-31
Anticipated expiration: 2019-04-24

Abstract

The utility model relates to an inclined-shaft hydraulic plunger pump or a motor, which is characterized in that a shell, a plunger piston connection disc, a cylinder body, a plunger piston, a distribution disc and a pump cover form a closed working cavity, wherein the plunger piston connection disc and a transmission shaft are made into a whole body, the plunger piston connection disc and the central plunger piston are provided with an inclination angle, seven plunger pistons are arranged inside plunger holes of the cylinder body, a ball head of the plunger piston is matched with a ball socket on the plunger piston connection disc, the ball head of the plunger piston is connected with the plunger piston connection disc through a return disc, the distribution disc is installed on the pumpcover, the pump cover is connected with the shell; and the plunger piston comprises a conical section, wherein the front end of the conical section is of a ball head, the rear end of the conical section is provided with a groove which is used for holding a plunger ring, and the gradient of the side surface of the conical section is 3.33 degrees to 3.36 degrees. The noise is reduced (actually-tested value is less than 80dB), the total efficiency reaches 90 percent, and the service life is more than 6000 hours.

Description

A kind of hydraulic clino-axial piston pump or motor

Technical field

The utility model relates to hydraulic pressure, machinery, electron controls technology field, relates in particular to a kind of hydraulic clino-axial piston pump or motor.

Background technique

Hydraulic axial piston pump or motor, because that it has a volume is little, in light weight, specific power is big, is easy to advantages such as control, is widely used at present in the various hydraulic systems.

In hydraulic axial piston pump or motor, the inclined shaft axial piston pump is a kind of high-pressure large-displacement axial piston pump, its structure characteristic and the key technical indexes are: volume is little, compact structure is simple, manufacturability is relatively good, and pressure reaches as high as 40Mpa, and rotating speed reaches as high as 6300rpm, the total efficiency height, life-span is about 5000 hours, is that the world today is more advanced, a kind of axial piston pump of reliable performance.Owing to have wide range of applications, be again to make the running mechanism integral device reduce the power source of volume, so this inclined shaft axial piston pumps of a large amount of employings of some countries of the countries in the world such as the U.S., Japan, India, China and Europe.

Present inclined shaft axial piston pump is mainly by housing, the plunger land, cylinder body, plunger, thrust plate and pump cover are formed the seal operation volume, plunger land and transmission shaft are made of one, be installed on the ball bearing and cone bearing in the housing, plunger land and newel are plugged with an inclination angle, 7 plungers are housed in the plunger hole of cylinder body, the bulb of plunger cooperates with ball-and-socket on the plunger land, the bulb of plunger connects with the plunger land by the backhaul dish, the center plunger is housed in the center hole of cylinder body, the center plunger base is equipped with prefastening force spring, thrust plate is installed on the pump cover, and pump cover is connected with housing, and the bi-side of pump cover are provided with filler opening and oil outlet; On housing, offer discharge orifice.

But plunger is in the plunger hole of cylinder body in the fore and aft motion process in the existing inclined shaft axial piston pump, plunger can't remain and the hole wall of plunger hole between tangent, thereby cause the resistance of plunger fore and aft motion to increase, cause the delivery efficiency of inclined shaft axial piston pump to descend, noise increases, the lost of life.

The model utility content

Technical problem to be solved in the utility model is that the defective that overcomes prior art provides a kind of delivery efficiency height, noise to reduce hydraulic clino-axial piston pump or motor that the life-span prolongs.

To achieve these goals, the technical solution adopted in the utility model is as follows:

A kind of hydraulic clino-axial piston pump or motor, by housing, the plunger land, cylinder body, plunger, thrust plate and pump cover are formed the seal operation volume, plunger land and transmission shaft are made of one, be installed on the ball bearing and cone bearing in the housing, plunger land and newel are plugged with an inclination angle, 7 plungers are housed in the plunger hole of cylinder body, the bulb of plunger cooperates with ball-and-socket on the plunger land, the bulb of plunger connects with the plunger land by the backhaul dish, the center plunger is housed in the center hole of cylinder body, and the center plunger base is equipped with prefastening force spring, and thrust plate is installed on the pump cover, pump cover is connected with housing, and the bi-side of pump cover are provided with filler opening and oil outlet; On housing, offer discharge orifice; Described plunger comprises a conical section, and the front end of conical section is a bulb, and the rear end of conical section has groove, is used to place plunger ring, it is characterized in that, the laterally inclined degree of described conical section be 3 ° 20 ' to 3 ° 21 ' 30 ".

The beneficial effects of the utility model are:

Plunger of the present utility model all the time can be tangent with the plunger hole of cylinder body in the telescopic slide process, makes the resistance of telescopic slide reduce, thereby reduced noise (measured value is less than 80dB), and total efficiency reaches 90%, and the life-span is more than 6000 hours.

Description of drawings

Describe the utility model in detail below in conjunction with the drawings and specific embodiments:

Fig. 1 is the structural representation of hydraulic clino-axial piston pump of the present utility model or motor.

Fig. 2 is the piston structure schematic representation of hydraulic clino-axial piston pump of the present utility model or motor.

Embodiment

For technological means, creation characteristic that the utility model is realized, reach purpose and effect is easy to understand, below in conjunction with concrete diagram, further set forth the utility model.

Referring to Fig. 1, the seal operation volume that hydraulic clino-axial piston pump or motor are made up of housing 1, plunger land 2, cylinder body 3, plunger 4, thrust plate 5 and pump cover 6, plunger land 2 is made of one with transmission shaft 7, is installed on the ball bearing 13 and cone bearing 14 in the housing 1.Plunger land 2 has an inclination angle with

center plunger

8, and 7 plungers 4 are housed in the plunger hole 9 of cylinder body 3, and the bulb of plunger 4 cooperates with ball-and-socket on the plunger land 2, and connects with plunger land 2 by backhaul dish 11.Center plunger 8 is housed in the center hole of cylinder body 3, prefastening force spring 12 is equipped with in the bottom of center plunger 8, spring 12 is pressed in the bulb of

center plunger

8 and 7 plungers 4 in the ball-and-socket on the plunger land 2, says that also an end sphere of cylinder body 3 tightly is pressed on the ball surface of thrust plate 5 simultaneously.Thrust plate 5 is installed on the pump cover 6, and pump cover 6 is connected with housing 1.Be provided with filler opening and oil outlet (not shown) in the bi-side of pump cover 6, on housing 1, have discharge orifice 15.Thrust plate 5 is designed to the sphere distributing construction with the surface of contact of cylinder body 3.

As shown in Figure 2, plunger 4 comprises a conical section 16, and the front end of conical section 16 is a bulb 17, and the rear end of conical section 16 has groove 18, is used to place plunger ring, the laterally inclined degree of conical section be 3 ° 20 ' to 3 ° 21 ' 30 ".Plunger 4 all the time can be tangent with the plunger hole 9 of cylinder body 3 in the telescopic slide process like this, makes the resistance of telescopic slide reduce, thereby reduced noise (measured value is less than 80dB), and total efficiency reaches 90%, and the life-span is more than 6000 hours.

Be provided with stair-stepping damping hole 10 at the center of plunger 4, the damping hole 10 of pressure oil by plunger 4 enters in the ball-and-socket on the plunger land 2 like this, bulb 17 to plunger 9 has formed certain reaction thrust, balances the impacting force of ball-and-socket on 17 pairs of plunger lands 2 of a big chunk bulb.

When the utility

model transmission shaft

7 and 2 rotations of plunger land, drive cylinder body 3 rotations by plunger 4, when plunger 4 stretches out, it is the pump oil suction that the low pressure window of fluid by filler opening and thrust plate 5 enters plunger 4 bottoms, when transmission shaft 7 and the 2 continuation rotations of plunger land, the fluid of plunger 4 bottoms is discharged by the high pressure window and the oil outlet on the pump cover 6 of thrust plate 5, oil extraction for pump, when rotating a circle, cylinder body just forms suction, oil extraction respectively once like this, promptly be this pump delivery g, the flow of this pump is Q=nq.The working principle of hydraulic axial piston motor is opposite with said process.

More than show and described basic principle of the present utility model, major character and advantage of the present utility model.The technician of the industry should understand; the utility model is not restricted to the described embodiments; what describe in the foregoing description and the specification is principle of the present utility model; the utility model also has various changes and modifications under the prerequisite that does not break away from the utility model spirit and scope, and these changes and improvements all fall in the claimed scope of the present utility model.The protection domain that the utility model requires is defined by appending claims and equivalent thereof.

Claims

1, a kind of hydraulic clino-axial piston pump or motor, by housing, the plunger land, cylinder body, plunger, thrust plate and pump cover are formed the seal operation volume, plunger land and transmission shaft are made of one, be installed on the ball bearing and cone bearing in the housing, plunger land and newel are plugged with an inclination angle, 7 plungers are housed in the plunger hole of cylinder body, the bulb of plunger cooperates with ball-and-socket on the plunger land, the bulb of plunger connects with the plunger land by the backhaul dish, the center plunger is housed in the center hole of cylinder body, and the center plunger base is equipped with prefastening force spring, and thrust plate is installed on the pump cover, pump cover is connected with housing, and the bi-side of pump cover are provided with filler opening and oil outlet; On housing, offer discharge orifice; Described plunger comprises a conical section, and the front end of conical section is a bulb, and the rear end of conical section has groove, is used to place plunger ring, it is characterized in that, the laterally inclined degree of described conical section be 3 ° 20 ' to 3 ° 21 ' 30 ".