Axial spinning plunger pump

Abstract

The invention discloses an axial spinning plunger pump and relates to the technical field of plunger pumps, the axial spinning plunger pump comprises a shell, a front cover and a center shaft, and an oil inlet cavity and an oil outlet cavity are formed in the shell; an annular boss is arranged at the position, close to the rear end, of the center shaft, a plurality of first cavities arranged in the axial direction in a penetrating mode are distributed on the annular boss in a surrounding mode, and all the first cavities communicate with the oil inlet cavity. A connecting channel communicated with the oil outlet cavity is arranged at the rear end of the central shaft; the annular boss is provided with a plurality of second cavities in one-to-one correspondence with the first cavities in the radial direction. A piston rod, a first reset spring, a clamping spring, a second reset spring, a first steel ball and an oil inlet one-way valve seat are sequentially arranged in the first cavity from front to back. An oil outlet one-way valve seat and a third reset spring are arranged in the second cavity, a wave-shaped disc is arranged on the rear end face of the front cover and provided with wave-shaped ring sliding ways matched with the piston rods, and the front ends of the piston rods are in tangent sliding contact with the wave-shaped ring sliding ways through rolling balls.

Description

Technical Field

[0001] The invention relates to the technical field of plunger pumps, in particular to an axially spun plunger pump. Background Art

[0002] Traditional plunger pumps are all single inclined plate structures. In order to increase the displacement, the piston stroke is increased, resulting in an increase in the volume of the piston cylinder and the housing, and an increase in the weight of the assembly. At the same time, the friction between the sliding shoe and the inclined plate during reciprocating motion, high linear speed, and low life are not convenient for vehicle layout, and are not conducive to the lightweight requirements of new energy vehicles. Summary of the invention

[0003] In view of the defects existing in the prior art, the purpose of the present invention is to provide an axial spinning plunger pump, which uses the wave fluctuations of the corrugated disk to control the stroke of the piston movement. There is a low-pressure chamber (oil inlet chamber) between the shell and the central axis, and the center of the central axis is a high-pressure chamber. When working, the symmetrical piston offsets the axial force, with high volumetric efficiency and high pressure. The oil is discharged from the central axis, and the area of ​​the high-pressure chamber is small, which increases the pressure-bearing capacity of the product, improves the product life, and reduces noise. At the same time, due to the compact structure of the corrugated disk, the product is small in size and light in weight, thereby saving installation space, reducing costs, and improving production efficiency. This structure is suitable for all chassis layouts of OEMs, and can be flexibly assembled according to the needs of the OEMs, providing products to customers quickly and conveniently.

[0004] To achieve the above purpose, the technical solution adopted by the present invention is: an axial spinning plunger pump, comprising a shell with an open front end and a front cover for closing the open end, a central axis is arranged in the shell, and the front end of the center extends from the front cover, and an oil inlet chamber and an oil outlet chamber are arranged in the shell; an annular boss is arranged near the rear end of the central axis, and a plurality of first chambers arranged axially through the annular boss are distributed around the annular boss, and each first chamber is connected to the oil inlet chamber respectively; a connecting channel connected to the oil outlet chamber is arranged at the rear end of the central axis; a plurality of second chambers corresponding to the first chambers are arranged radially on the annular boss, one end of the second chamber is connected to the connecting channel, and the other end of the second chamber is connected to the corresponding first chamber; the first chamber A piston rod, a first return spring, a retaining spring, a second return spring, a first steel ball and an oil inlet check valve seat are sequentially arranged in the chamber from front to back; the oil inlet check valve seat is provided with a first inlet connected to the oil inlet chamber, and the first steel ball is used to block the first inlet; an oil outlet check valve seat and a third return spring are arranged in the second chamber, the oil outlet check valve seat is provided with a second inlet connected to the first chamber, one end of the third return spring is connected to the inner wall of the second chamber, and the other end of the third return spring is connected to the second steel ball for blocking the second inlet; a corrugated disk is arranged on the rear end face of the front cover, and the corrugated disk is provided with a corrugated ring slideway matched with each piston rod, and the front end of each piston rod is in tangential sliding contact with the corrugated ring slideway through a rolling ball.

[0005] Based on the above technical solution, the front end of the piston rod is provided with a ball socket adapted to the rolling ball, the rear end of the piston rod is provided with a limiting groove, one end of the first return spring is connected to the limiting groove, and the other end of the first return spring is connected to the retaining spring.

[0006] On the basis of the above technical solution, a gasket is arranged on the rear side of the retaining spring, one end of the second return spring is connected to the gasket, and the other end of the second return spring is connected to the first steel ball.

[0007] On the basis of the above technical solution, the oil inlet cavity is provided with an oil inlet, and the oil inlet is located on the side of the shell.

[0008] On the basis of the above technical solution, the oil outlet cavity is provided with an oil outlet, which is located at the rear end of the shell and opposite to the rear end of the central axis.

[0009] On the basis of the above technical solution, the central axis is rotatably arranged in the housing via a bearing.

[0010] The beneficial effects of the present invention are:

[0011] The present invention uses the wave fluctuation of the corrugated disk to control the stroke of the piston movement. There is a low-pressure chamber (oil inlet chamber) between the shell and the central axis, and a high-pressure chamber at the center of the central axis. When working, the symmetrical piston offsets the axial force, with high volumetric efficiency and high pressure. The central axis is oil-outlet, and the area of ​​the high-pressure chamber is small, which increases the pressure-bearing capacity of the product, improves the product life, and reduces noise. At the same time, due to the compact structure of the corrugated disk, the product is small in size and light in weight, thereby saving installation space, reducing costs, and improving production efficiency. This structure is suitable for all chassis layouts of OEMs, can be flexibly assembled according to the needs of the OEMs, and can provide products to customers quickly and conveniently. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a front view of the axial spinning plunger pump in the embodiment of the present invention;

[0013] Figure 2 for Figure 1 Sectional view along AA direction;

[0014] Figure 3 It is a structural schematic diagram of the front cover in an embodiment of the present invention;

[0015] Figure 4 Schematic diagram of the structure of the central axis in an embodiment of the present invention.

[0016] Reference numerals:

[0017] 1-housing; 11-oil inlet chamber; 12-oil outlet chamber; 13-oil outlet; 14-oil inlet;

[0018] 2-front cover; 21-wave plate; 22-wave ring slide; 23-rolling ball;

[0019] 3-central axis; 301-connecting channel; 302-annular boss; 303-first chamber; 304-second chamber; 305-circlip; 306-piston rod; 307-ball socket; 308-limiting groove; 309-first return spring; 310-oil inlet one-way valve seat; 311-first inlet; 312-first steel ball; 313-second return spring; 314-gasket; 315-oil outlet one-way valve seat; 316-second inlet; 317-second steel ball; 318-third return spring. DETAILED DESCRIPTION

[0020] Embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions.

[0021] In the description of the present invention, it should be noted that directional words, such as the terms "center", "lateral (X)", "longitudinal (Y)", "vertical (Z)", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", etc., indicating directions and positional relationships are based on the directions or positional relationships shown in the accompanying drawings, which are only for the convenience of narrating the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and cannot be understood as limiting the specific scope of protection of the present invention.

[0022] In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features. Therefore, the definition of "first" and "second" features can explicitly or implicitly include one or more of the features. In the description of the present invention, "several" and "a number" mean two or more, unless otherwise clearly and specifically defined.

[0023] The following is a further description of the specific embodiments of the present invention in conjunction with the drawings of the specification, so that the technical solution and its beneficial effects of the present invention are clearer and more explicit. The following description of the embodiments with reference to the drawings is exemplary and intended to explain the present invention, but cannot be understood as limiting the present invention.

[0024] See also Figure 1 to Figure 4As shown, an embodiment of the present invention provides an axial spinning plunger pump, including a housing 1 with an open front end and a front cover 2 for closing the open end, a central shaft 3 is arranged in the housing 1, and the front end of the center extends from the front cover 2, and specifically, the central shaft 3 is rotatably arranged in the housing 1 through a bearing. An oil inlet chamber 11 and an oil outlet chamber 12 are arranged in the housing 1; specifically, the oil inlet chamber 11 is provided with an oil inlet port 14, and the oil inlet port 14 is located on the side of the housing 1. The oil outlet chamber 12 is provided with an oil outlet port 13, and the oil outlet port 13 is located at the rear end of the housing 1 and opposite to the rear end of the central shaft 3.

[0025] An annular boss 302 is disposed near the rear end of the central shaft 3. A plurality of first chambers 303 are distributed around the annular boss 302 and are axially connected thereto. Each first chamber 303 is connected to the oil inlet chamber 11.

[0026] The rear end of the central shaft 3 is provided with a connecting passage 301 communicating with the oil outlet chamber 12;

[0027] The annular boss 302 is provided with a plurality of second chambers 304 corresponding to the first chambers 303 along the radial direction, one end of the second chamber 304 is communicated with the connecting channel 301, and the other end of the second chamber 304 is communicated with the corresponding first chamber 303;

[0028] The first chamber 303 is provided with a piston rod 306, a first return spring 309, a retaining spring 305, a second return spring 313, a first steel ball 312 and an oil inlet check valve seat 310 from front to back; the oil inlet check valve seat 310 is provided with a first inlet 311 communicating with the oil inlet chamber 11, and the first steel ball 312 is used to block the first inlet 311;

[0029] An oil outlet check valve seat 315 and a third return spring 318 are provided in the second chamber 304. The oil outlet check valve seat 315 is provided with a second inlet 316 communicating with the first chamber 303. One end of the third return spring 318 is connected to the inner wall of the second chamber 304. The other end of the third return spring 318 is connected to a second steel ball 317 for blocking the second inlet 316.

[0030] The rear end face of the front cover 2 is provided with a corrugated disk 21 , and the corrugated disk 21 is provided with a corrugated ring slideway 22 adapted to each piston rod 306 , and the front end of each piston rod 306 is in tangential sliding contact with the corrugated ring slideway 22 through a rolling ball 23 .

[0031] See also Figure 4As shown, the front end of the piston rod 306 is provided with a ball socket 307 adapted to the rolling ball 23, the rear end of the piston rod 306 is provided with a limiting groove 308, one end of the first return spring 309 is connected to the limiting groove 308, and the other end of the first return spring 309 is connected to the retaining spring 305. Specifically, a gasket 314 is provided on the rear side of the retaining spring 305, one end of the second return spring 313 is connected to the gasket 314, and the other end of the second return spring 313 is connected to the first steel ball 312.

[0032] The working principle of the present invention is:

[0033] 1. The ball and the piston rod are in sliding contact through the end face ball socket, and the first return spring is installed in the piston rod to form a piston assembly.

[0034] 2. The oil suction gasket, oil suction check valve seat, first steel ball and retaining spring form the oil suction check valve group.

[0035] 3. The third return spring, the oil outlet check valve seat and the second steel ball form the oil outlet check valve group

[0036] 4. Six evenly distributed oil suction check valve groups are installed on both sides of the central shaft, six evenly distributed oil discharge check valve groups are installed at the bottom of the circumferential piston hole on the side, and six evenly distributed piston groups are installed in the piston holes on both ends. The steel balls on the end faces of the piston groups are in tangential sliding contact with the upper and lower corrugated disc slideways. Six piston holes are evenly distributed on the upper and lower ends of the central shaft, forming 12 piston cavities. The waveform of the corrugated disc 16 controls the piston stroke. When the central shaft rotates, the piston group works up and down through the waveform of the corrugated disc to form an oil suction and discharge action. The conversion of pressure energy is realized.

[0037] 5. When the piston moves from the peak of the corrugated disk to the bottom of the corrugated disk, the suction force opens the oil suction one-way valve group, and the outlet pressure closes the oil discharge one-way valve group, forming an oil suction action; when the piston moves from the bottom of the corrugated disk to the peak of the corrugated disk, the pressure opens the oil discharge one-way valve group, allowing the pressurized oil to be discharged.

[0038] In the description of the specification, the description with reference to the terms "one embodiment", "preferably", "example", "specific example" or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention, and the schematic expressions of the above terms in this specification do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0039] The present invention is not limited to the above-mentioned embodiments. For ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications are also considered to be within the scope of protection of the present invention. The contents not described in detail in this specification belong to the prior art known to professional and technical personnel in this field.

Claims

1. An axially-spinning plunger pump, comprising a housing (1) with an open front end and a front cover (2) for closing the open end, wherein a central axis (3) is arranged in the housing (1), and the front end of the central axis extends from the front cover (2), characterized in that: An oil inlet chamber (11) and an oil outlet chamber (12) are provided in the housing (1); An annular boss (302) is arranged near the rear end of the central shaft (3), and a plurality of first chambers (303) are arranged to penetrate the annular boss (302) in the axial direction, and each first chamber (303) is respectively connected to the oil inlet chamber (11); The rear end of the central shaft (3) is provided with a connecting passage (301) communicating with the oil outlet chamber (12); The annular boss (302) is provided with a plurality of second chambers (304) corresponding to the first chambers (303) in a one-to-one manner along the radial direction, one end of the second chamber (304) is communicated with the connecting channel (301), and the other end of the second chamber (304) is communicated with the corresponding first chamber (303); The first chamber (303) is provided with a piston rod (306), a first return spring (309), a retaining spring (305), a second return spring (313), a first steel ball (312) and an oil inlet check valve seat (310) in sequence from front to back; the oil inlet check valve seat (310) is provided with a first inlet (311) communicating with the oil inlet chamber (11), and the first steel ball (312) is used to block the first inlet (311); An oil outlet check valve seat (315) and a third return spring (318) are provided in the second chamber (304); the oil outlet check valve seat (315) is provided with a second inlet (316) communicating with the first chamber (303); one end of the third return spring (318) is connected to the inner wall of the second chamber (304); and the other end of the third return spring (318) is connected to a second steel ball (317) for blocking the second inlet (316); The rear end surface of the front cover (2) is provided with a corrugated disk (21), and the corrugated disk (21) is provided with a corrugated ring slideway (22) adapted to each piston rod (306), and the front end of each piston rod (306) is in tangential sliding contact with the corrugated ring slideway (22) through a rolling ball (23).

2. The axial spinning plunger pump according to claim 1, characterized in that: The front end of the piston rod (306) is provided with a ball socket (307) adapted to the rolling ball (23), the rear end of the piston rod (306) is provided with a limiting groove (308), one end of the first return spring (309) is connected to the limiting groove (308), and the other end of the first return spring (309) is connected to the retaining spring (305).

3. The axial spinning plunger pump according to claim 1, characterized in that: A gasket (314) is provided on the rear side of the clamping spring (305), one end of the second return spring (313) is connected to the gasket (314), and the other end of the second return spring (313) is connected to the first steel ball (312).

4. The axial spinning plunger pump according to claim 1, characterized in that: The oil inlet chamber (11) is provided with an oil inlet port (14), and the oil inlet port (14) is located on the side of the housing (1).

5. The axial spinning plunger pump according to claim 1, characterized in that: The oil outlet cavity (12) is provided with an oil outlet (13), and the oil outlet (13) is located at the rear end of the housing (1) and is opposite to the rear end of the central shaft (3).

6. The axial spinning plunger pump according to claim 1, characterized in that: The central shaft (3) is rotatably arranged in the housing (1) via a bearing.

Images