CN210033747U

CN210033747U - Plunger pump

Info

Publication number: CN210033747U
Application number: CN201920747220.9U
Authority: CN
Inventors: 曹安丽; 杨绪仁
Original assignee: Zhuhai Zhong Cheng Tian Di Technology Co Ltd
Current assignee: Zhuhai Zhong Cheng Tian Di Technology Co Ltd
Priority date: 2019-05-22
Filing date: 2019-05-22
Publication date: 2020-02-07
Anticipated expiration: 2029-05-22

Abstract

A plunger pump comprises a power end and a hydraulic end; the power end comprises a driving motor and a driving shaft; the hydraulic end comprises a cylinder body and a pump body, the cylinder body consists of a front cover and a rear cover, a swash plate and a swash plate bearing are arranged in the cylinder body, the driving shaft penetrates through the front cover and the swash plate bearing and is fixed with the swash plate to drive the swash plate to rotate, a piston and a central shaft are arranged on the swash plate, and the rear end of the central shaft is fixed on the front cover; the pump body comprises a shell, a liquid inlet, a liquid outlet, a piston cavity and a liquid flow channel, wherein the liquid inlet and the liquid outlet are arranged in the shell, the length ratio of the piston to the liquid flow channel is 3-4:1, and the volume ratio of the piston cavity to the liquid flow channel is 12-14: 1. The plunger pump reduces the liquid flow channel, increases the length ratio and the volume ratio of the liquid flow channel to the piston, greatly enhances the air pressure of the liquid flow channel, increases the drainage force and the drainage pressure, and can still meet the drainage requirement under the conditions of reduced volume and reduced power of the plunger pump.

Description

Plunger pump

[ technical field ] A method for producing a semiconductor device

The utility model relates to a plunger pump.

[ background of the invention ]

The plunger pump is an important device of the hydraulic system. The volume of the sealed working cavity is changed to realize the suction and discharge of liquid by the reciprocating motion of the plunger in the cylinder body. The plunger pump has the advantages of high rated pressure, compact structure, high efficiency, convenient flow regulation and the like.

The plunger pump has wide application, and is widely applied to occasions with high pressure, large flow and flow needing to be adjusted, such as hydraulic machines, engineering machinery and ships. However, many miniaturized mechanical devices are also applied to plunger pumps, and accordingly, the volume of the plunger pump is also reduced correspondingly, and the power of the miniaturized mechanical devices is not strong and low, so that the pressure discharge capability of the plunger pump is limited, the discharge amount is small, the discharge pressure is low, and the use requirements cannot be met.

In order to solve the problems, a new technical scheme is provided.

[ Utility model ] content

The utility model aims at overcoming the defects of the prior art and providing a plunger pump

In order to solve the technical problem, the utility model adopts the following technical scheme:

a plunger pump comprises a power end and a hydraulic end; the power end comprises a driving motor and a driving shaft; the hydraulic end comprises a cylinder body and a pump body, the cylinder body consists of a front cover and a rear cover, a swash plate and a swash plate bearing are arranged in the cylinder body, the driving shaft penetrates through the front cover and the swash plate bearing and is fixed with the swash plate to drive the swash plate to rotate, a piston and a central shaft are arranged on the swash plate, and the rear end of the central shaft is fixed on the rear cover; the pump body comprises a shell, a liquid inlet, a liquid outlet, a piston cavity and a liquid flow channel, wherein the liquid inlet and the liquid outlet are arranged in the shell, the length ratio of the piston to the liquid flow channel is 3-4:1, and the volume ratio of the piston cavity to the liquid flow channel is 12-14: 1.

In a further improvement, the length ratio of the piston to the liquid flow passage is 3.6:1, and the volume ratio of the piston cavity to the liquid flow passage is 13.04: 1.

In a further development, the swash plate bearing is a tapered roller bearing.

In a further improvement, a central shaft bearing is arranged at the joint of the central shaft and the rear cover.

In a further improvement, the number of the pistons is two, and the pistons are respectively arranged on two sides of the swash plate.

Compared with the prior art, the beneficial effects of the utility model are that: the utility model discloses change liquid flow way (water flow way) for a short time, make its length ratio and the volume ratio with the piston strengthen, greatly strengthened liquid flow way's air pressure for drainage dynamics, drainage pressure increase, like this at the plunger pump the volume reduce, under the condition that power reduces, still can satisfy the drainage demand.

The present invention will be described in further detail with reference to the accompanying drawings and embodiments:

fig. 1 is a schematic perspective view of an embodiment of the present invention;

fig. 2 is a first schematic structural diagram of an embodiment of the present invention;

fig. 3 is a schematic structural diagram ii according to an embodiment of the present invention;

fig. 4 is a third schematic structural diagram of the embodiment of the present invention;

fig. 5 is a fourth schematic structural diagram (cross-sectional view) of the embodiment of the present invention;

fig. 6 is a schematic structural diagram of a fifth embodiment of the present invention (cross-sectional state).

[ detailed description ] embodiments

Reference will now be made in detail to the embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar functions throughout.

The orientation shown in the drawings is not to be considered as limiting the scope of the invention, but merely as a reference to the preferred embodiments, changes in position or addition of numbers or structural simplifications may be made to the product parts shown in the drawings.

The relation of "connected" between the components shown in the drawings and described in the specification can be understood as fixedly connected or detachably connected or integrally connected; the connecting elements can be directly connected or connected through an intermediate medium, and persons skilled in the art can understand the connecting relation according to specific conditions, and can use the connecting elements in a screwed connection or riveting connection or welding connection or clamping connection or embedding connection mode to replace different embodiments in a proper mode.

The terms of orientation such as up, down, left, right, top, bottom, and the like in the description and the orientation shown in the drawings, may be used for direct contact or contact with each other through another feature therebetween; above may be directly above and obliquely above, or it simply means above the other; other orientations may be understood by analogy.

The material for manufacturing the solid-shaped component shown in the specification and the drawings can be a metal material or a non-metal material or other composite materials; the machining processes used for components having solid shapes can be stamping, forging, casting, wire cutting, laser cutting, casting, injection molding, digital milling, three-dimensional printing, machining, and the like; one skilled in the art can select the materials and the manufacturing process adaptively or in combination according to different processing conditions, cost and precision.

The utility model provides a plunger pump, as shown in figures 1 to 6, comprising a power end and a hydraulic end; the power end comprises a driving motor 10 and a driving shaft 20; the hydraulic end comprises a cylinder body and a pump body, the cylinder body consists of a front cover 30 and a rear cover 40, a swash plate 50 and a swash plate bearing 60 are arranged in the cylinder body, the driving shaft 20 penetrates through the front cover 30 and the swash plate bearing 60 and then is fixed with the swash plate 50 to drive the swash plate to rotate, a piston 70 and a central shaft 80 are arranged on the swash plate 50, and the rear end of the central shaft 80 is fixed on the rear cover 40; the pump body comprises a shell 90, a liquid inlet 100, a liquid outlet 110, a piston cavity 120 and a liquid flow channel 130, wherein the liquid inlet 100 and the liquid outlet 110 are arranged in the shell 90, the length ratio of the piston 70 to the liquid flow channel 130 is 3-4:1, and the volume ratio of the piston cavity 120 to the liquid flow channel 130 is 12-14: 1.

The utility model discloses change liquid flow channel 130 (water flow channel) for a short time, make its length ratio with piston 70 increase, make its volume ratio with piston chamber 120 increase, greatly strengthened liquid flow channel 130's air pressure for drainage dynamics, drainage pressure increase, like this at the plunger pump the volume reduce, under the condition that power reduces, still can satisfy the drainage demand.

In an embodiment, the length ratio of the piston 70 to the liquid flow passage 130 is 3.6:1, and the volume ratio of the piston chamber 120 to the liquid flow passage 130 is 13.04: 1.

In the embodiment, as shown in fig. 1 to 6, the swash plate bearing 60 is a tapered roller bearing, and here, the swash plate bearing 60 is changed from a conventional deep groove ball bearing to a tapered roller bearing, so that the plunger pump can effectively bear axial and radial loads in use, and meanwhile, the swinging is reduced, the stability is enhanced, and the abrasion is also reduced.

In the embodiment, as shown in fig. 1 to 6, a central shaft bearing 140 is disposed at a connection portion of the central shaft 80 and the rear cover 40, so that the swing of the central shaft 80 can be reduced, and the stability can be enhanced.

In the embodiment, as shown in fig. 1 to 6, the number of the pistons 70 is two, and the pistons are respectively disposed on both sides of the swash plate 50.

Although the present invention has been described in detail with reference to the above embodiments, it will be apparent to those skilled in the art from this disclosure that various changes or modifications can be made therein without departing from the spirit and scope of the invention as defined in the appended claims. Therefore, the detailed description of the embodiments of the present disclosure is to be construed as merely illustrative, and not limitative of the present disclosure, but rather to limit the scope thereof by the appended claims.

Claims

1. A plunger pump is characterized by comprising a power end and a liquid end; the power end comprises a driving motor and a driving shaft; the hydraulic end comprises a cylinder body and a pump body, the cylinder body consists of a front cover and a rear cover, a swash plate and a swash plate bearing are arranged in the cylinder body, the driving shaft penetrates through the front cover and the swash plate bearing and is fixed with the swash plate to drive the swash plate to rotate, a piston and a central shaft are arranged on the swash plate, and the rear end of the central shaft is fixed on the rear cover; the pump body comprises a shell, a liquid inlet, a liquid outlet, a piston cavity and a liquid flow channel, wherein the liquid inlet and the liquid outlet are arranged in the shell, the length ratio of the piston to the liquid flow channel is 3-4:1, and the volume ratio of the piston cavity to the liquid flow channel is 12-14: 1.

2. The plunger pump of claim 1, wherein the length ratio of the piston to the fluid flow passage is 3.6:1, and the volume ratio of the piston chamber to the fluid flow passage is 13.04: 1.

3. A plunger pump according to claim 1, characterised in that the swash plate bearing is a tapered roller bearing.

4. The plunger pump of claim 1, wherein a center shaft bearing is provided at the junction of the center shaft and the rear cover.

5. The plunger pump of claim 1, wherein said pistons are two in number and are disposed on opposite sides of said swash plate.