Radial spinning plunger pump

Abstract

The invention discloses a radial spinning plunger pump, and relates to the technical field of plunger pumps, the radial spinning plunger pump comprises a shell and a center shaft arranged in the shell, the front end of the center shaft extends out of the shell, 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 piston cavities are formed in the annular boss in the radial direction, and piston mechanisms are arranged in the piston cavities. A connecting channel is arranged at the rear end of the center shaft, one end of the connecting channel is communicated with the oil outlet cavity, and the other end of the connecting channel is communicated with the piston cavities. Each piston cavity is further communicated with the oil inlet cavity. The inner side wall of the shell is provided with a wave-shaped ring sliding way matched with the piston mechanisms, and the piston mechanisms are in tangent sliding contact with the wave-shaped ring sliding way through rolling balls.

Description

Technical Field

[0001] The invention relates to the technical field of plunger pumps, in particular to a radial spinning 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 housing, and an increase in the weight of the assembly. At the same time, the sliding shoe and the inclined plate are rubbed during reciprocating motion, resulting in high linear speed and low life. This is not convenient for vehicle layout and is not conducive to the lightweight requirements of new energy vehicles. In order to be suitable for installation in various OEMs, it solves the problems of inconvenient assembly, space occupation, increased costs and reduced production efficiency. Summary of the invention

[0003] In view of the defects existing in the prior art, the purpose of the present invention is to provide a radial spinning plunger pump, which uses the wave fluctuation of the corrugated ring 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, prolongs 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.

[0004] In order to achieve the above purpose, the technical solution adopted by the present invention is: a radial spinning plunger pump, comprising a shell and a central axis arranged in the shell, and the front end of the central axis extends from the shell, 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 piston chambers are radially opened on the annular boss, and a piston mechanism is arranged in the piston chamber; a connecting channel is arranged at the rear end of the central axis, one end of the connecting channel is connected to the oil outlet chamber, and the other end of the connecting channel is connected to each piston chamber respectively; each piston chamber is also connected to the oil inlet chamber respectively; a corrugated ring slideway adapted to the piston mechanism is arranged on the inner side wall of the shell, and each piston mechanism is in tangential sliding contact with the corrugated ring slideway through a rolling ball.

[0005] On the basis of the above technical solution, the piston mechanism includes a piston body and a first return spring, the outer end of the piston body is provided with a ball socket adapted to the rolling ball, the inner end of the piston body is provided with a limiting groove, one end of the first return spring is abutted against the limiting groove, and the other end of the first return spring is abutted against the inner wall of the piston cavity.

[0006] On the basis of the above technical solution, an oil inlet check valve is provided at the connection point between the piston chamber and the oil inlet chamber.

[0007] On the basis of the above technical solution, the oil inlet check valve has a first valve body, and the first inlet of the first valve body is connected to the oil inlet chamber, and the first outlet of the first valve body is connected to the piston chamber; a retaining spring is arranged in the first valve body, and a first steel ball for blocking the first inlet is arranged on the front side of the retaining spring.

[0008] On the basis of the above technical solution, a gasket is arranged on the rear side of the retaining spring.

[0009] On the basis of the above technical solution, each oil inlet one-way valve is located on the front side of the annular boss.

[0010] On the basis of the above technical solution, an oil outlet one-way valve is provided at the connection point between the piston chamber and the connecting channel.

[0011] On the basis of the above technical solution, the oil outlet check valve includes a second valve body, and the second inlet of the second valve body is connected to the piston chamber, and the second outlet of the second valve body is connected to the connecting channel; a second return spring is arranged in the second valve body, one end of the second return spring is connected to the inner wall of the second valve body, and the other end of the second return spring is connected to a second steel ball for blocking the second inlet.

[0012] On the basis of the above technical solution, the oil inlet chamber is provided with at least one oil inlet port, and the oil outlet chamber is provided with at least one oil outlet port.

[0013] On the basis of the above technical solution, the central axis is rotatably arranged in the housing via a bearing.

[0014] The beneficial effects of the present invention are:

[0015] The present invention uses the wave fluctuation of the wave ring to control the stroke of the piston movement. The low-pressure chamber (oil inlet chamber) is between the shell and the center shaft, and the center of the center shaft is the high-pressure chamber. When working, the symmetrical piston offsets the axial force, with high volumetric efficiency and high pressure. The center shaft is oil-outlet, and the area of ​​the high-pressure chamber is small, which increases the pressure-bearing capacity of the product, prolongs the product life, and reduces noise. At the same time, due to the compact structure of the wave disk, the product is small in size and light in weight, thereby saving installation space, reducing costs, and improving production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a front view of a radial spinning plunger pump in an embodiment of the present invention;

[0017] Figure 2 for Figure 1 Sectional view along AA direction;

[0018] Figure 3 Schematic diagram of the structure of the central axis in an embodiment of the present invention.

[0019] Reference numerals:

[0020] 1-housing; 11-oil inlet chamber; 12-oil inlet port; 13-oil outlet chamber; 14-oil outlet port; 15-waveform ring slideway; 16-rolling ball;

[0021] 2-central axis; 21-connecting channel; 22-annular boss; 221-piston chamber; 23-piston mechanism; 231-piston body; 232-ball socket; 233-limiting groove; 234-first return spring; 24-oil inlet check valve; 241-first valve body; 242-first inlet; 243-first outlet; 244-first steel ball; 245-circlip; 246-gasket; 25-oil outlet check valve; 251-second valve body; 252-second inlet; 253-second outlet; 254-second steel ball; 255-second return spring. DETAILED DESCRIPTION

[0022] 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.

[0023] 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.

[0024] 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.

[0025] 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.

[0026] See also Figure 1 to Figure 3As shown, the embodiment of the present invention provides a radial spinning plunger pump, including a housing 1 and a central shaft 2 arranged in the housing 1, and the front end of the central shaft 2 extends from the housing 1, and the housing 1 is provided with an oil inlet chamber 11 and an oil outlet chamber 13; specifically, the oil inlet chamber 11 is provided with two oil inlets 12, and the oil outlet chamber 13 is provided with two oil outlets 14. The oil inlet and the oil outlet can be freely matched according to the layout of the user's oil suction pipe and oil outlet pipe, and can form oil pipe layout modes such as side inlet and side outlet, side inlet and rear outlet, rear inlet and rear outlet, rear inlet and side outlet, and one inlet and two outlets. After the layout mode is selected, the remaining unnecessary oil ports can be blocked with seals.

[0027] An annular boss 22 is provided near the rear end of the central shaft 2. The annular boss 22 is provided with a plurality of piston cavities 221 in the radial direction. A piston mechanism 23 is provided in the piston cavity 221.

[0028] A connecting channel 21 is provided at the rear end of the central shaft 2, one end of the connecting channel 21 is connected to the oil outlet chamber 13, and the other end of the connecting channel 21 is respectively connected to each piston chamber 221; each piston chamber 221 is also respectively connected to the oil inlet chamber 11; specifically, the central shaft 2 is rotatably arranged in the housing 1 through a bearing.

[0029] The inner wall of the housing 1 is provided with a corrugated ring slideway 15 adapted to the piston mechanism 23 , and each piston mechanism 23 is in tangential sliding contact with the corrugated ring slideway 15 through a rolling ball 16 .

[0030] See also Figure 3 As shown, the piston mechanism 23 includes a piston body 231 and a first return spring 234. The outer end of the piston body 231 is provided with a ball socket 232 adapted to the ball 16, and the inner end of the piston body 231 is provided with a limiting groove 233. One end of the first return spring 234 abuts against the limiting groove 233, and the other end of the first return spring 234 abuts against the inner wall of the piston cavity 221.

[0031] See also Figure 3 As shown, an oil inlet check valve 24 is provided at the connection between the piston chamber 221 and the oil inlet chamber 11. Specifically, the oil inlet check valve 24 has a first valve body 241, and a first inlet 242 of the first valve body 241 is connected to the oil inlet chamber 11, and a first outlet 243 of the first valve body 241 is connected to the piston chamber 221; a retaining spring 245 is provided in the first valve body 241, and a first steel ball 244 for blocking the first inlet 242 is provided on the front side of the retaining spring 245. A gasket 246 is provided on the rear side of the retaining spring 245. Each oil inlet check valve 24 is located on the front side of the annular boss 22.

[0032] See also Figure 3As shown, an oil outlet check valve 25 is provided at the connection point between the piston cavity 221 and the connecting channel 21. Specifically, the oil outlet check valve 25 includes a second valve body 251, and a second inlet 252 of the second valve body 251 is connected to the piston cavity 221, and a second outlet 253 of the second valve body 251 is connected to the connecting channel 21; a second return spring 255 is provided in the second valve body 251, one end of the second return spring 255 is connected to the inner wall of the second valve body 251, and the other end of the second return spring 255 is connected to a second steel ball 254 for blocking the second inlet 252.

[0033] The working principle of the present invention is:

[0034] There are 6 evenly distributed oil suction check valve groups on both sides of the central shaft, 6 evenly distributed oil discharge check valve groups on the bottom of the side circumference piston hole, 6 evenly distributed piston groups in the piston hole, the steel ball on the end face of the piston group is in tangential sliding contact with the wave ring slideway, 6 piston holes are evenly distributed on the outer circle of the side of the central shaft, distributed in two rows up and down, forming 12 piston chambers; the waveform of the wave ring 1 controls the piston stroke; when the central shaft rotates, the piston group works up and down through the waveform of the wave ring to form an oil suction and discharge action, realizing the conversion of pressure energy.

[0035] When the piston moves from the peak of the waveform ring to the bottom of the waveform of the waveform ring, the suction force opens the oil suction one-way valve group during oil suction, 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 waveform of the waveform ring to the peak of the waveform, the pressure opens the oil discharge one-way valve to discharge the pressurized oil.

[0036] 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.

[0037] 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. A radial spinning plunger pump, comprising a housing (1) and a central shaft (2) disposed in the housing (1), wherein the front end of the central shaft (2) extends from the housing (1), characterized in that: An oil inlet chamber (11) and an oil outlet chamber (13) are provided in the housing (1); An annular boss (22) is arranged near the rear end of the central axis (2), the annular boss (22) is radially provided with a plurality of piston cavities (221), and a piston mechanism (23) is arranged in the piston cavity (221); A connecting channel (21) is provided at the rear end of the central shaft (2); one end of the connecting channel (21) is in communication with the oil outlet chamber (13), and the other end of the connecting channel (21) is in communication with each piston chamber (221); each piston chamber (221) is also in communication with the oil inlet chamber (11); The inner wall of the housing (1) is provided with a corrugated ring slideway (15) adapted to the piston mechanism (23), and each piston mechanism (23) is in tangential sliding contact with the corrugated ring slideway (15) via a rolling ball (16).

2. The radial spinning plunger pump according to claim 1, characterized in that: The piston mechanism (23) comprises a piston body (231) and a first return spring (234); the outer end of the piston body (231) is provided with a ball socket (232) adapted to the rolling ball (16); the inner end of the piston body (231) is provided with a limiting groove (233); one end of the first return spring (234) is abutted against the limiting groove (233), and the other end of the first return spring (234) is abutted against the inner wall of the piston cavity (221).

3. The radial spinning plunger pump according to claim 1, characterized in that: An oil inlet check valve (24) is provided at the connection point between the piston chamber (221) and the oil inlet chamber (11).

4. The radial spinning plunger pump according to claim 3, characterized in that: The oil inlet check valve (24) has a first valve body (241), and a first inlet (242) of the first valve body (241) is connected to the oil inlet chamber (11), and a first outlet (243) of the first valve body (241) is connected to the piston chamber (221); a retaining spring (245) is arranged inside the first valve body (241), and a first steel ball (244) for blocking the first inlet (242) is arranged on the front side of the retaining spring (245).

5. The radial spinning plunger pump according to claim 4, characterized in that: A gasket (246) is provided on the rear side of the clamping spring (245).

6. The radial spinning plunger pump according to claim 3, characterized in that: Each oil inlet one-way valve (24) is located on the front side of the annular boss (22).

7. The radial spinning plunger pump according to claim 1, characterized in that: An oil outlet one-way valve (25) is provided at the connection point between the piston chamber (221) and the connecting channel (21).

8. The radial spinning plunger pump according to claim 7, characterized in that: The oil outlet one-way valve (25) includes a second valve body (251), and a second inlet (252) of the second valve body (251) is connected to the piston chamber (221), and a second outlet (253) of the second valve body (251) is connected to the connecting channel (21); a second return spring (255) is arranged in the second valve body (251), one end of the second return spring (255) is connected to the inner wall of the second valve body (251), and the other end of the second return spring (255) is connected to a second steel ball (254) for blocking the second inlet (252).

9. The radial spinning plunger pump according to claim 1, characterized in that: The oil inlet chamber (11) is provided with at least one oil inlet port (12), and the oil outlet chamber (13) is provided with at least one oil outlet port (14).

10. The radial spinning plunger pump according to claim 1, characterized in that: The central shaft (2) is rotatably arranged in the housing (1) via a bearing.

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