Vane pump capable of reducing abrasion of sliding block

Abstract

The utility model discloses a vane pump capable of reducing sliding block abrasion, which comprises a pump body, a variable spring, a rotor and a variable sliding block, a variable feedback cavity and a spring cavity used for installing the variable spring are arranged between the variable sliding block and the cavity wall of the pump body, and the position of the variable feedback cavity is opposite to the position of the spring cavity. A first contact face and a second contact face are arranged between the variable sliding block and the spring cavity, a guide oil channel is arranged on the pump body along the spring cavity, one end of the guide oil channel is connected with the oil outlet cavity, and the other end of the guide oil channel is connected to the second contact face. By improving the lubricating condition of the sliding block, the reliability of the pump is improved, and the service life of the pump is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of oil pump lubrication, in particular to a vane pump capable of reducing the wear of a sliding block. Background Art

[0002] As an important fluid transmission device, direct-push vane variable displacement pumps are widely used in various hydraulic systems for pressure regulation and flow control due to their high efficiency and flexibility. These pumps adjust the eccentricity and, in turn, the displacement to suit different operating requirements by moving an internal slider up and down within a guide rail cavity. However, the relative movement between the slider and the guide rail cavity inevitably causes wear on the contact surfaces, particularly where the slider's sidewalls meet the guide rail. This wear not only affects the pump's efficiency but can also shorten its service life and reduce the overall reliability of the system. Utility Model Content

[0003] The utility model provides a vane pump capable of reducing the wear of a sliding block, and improves the reliability and service life of the pump by improving the lubrication condition of the sliding block.

[0004] In order to achieve the above-mentioned purpose, the embodiments of the present invention adopt the following technical solutions:

[0005] A vane pump capable of reducing slider wear comprises a pump body, a variable spring, a rotor and a variable slider, wherein an oil outlet chamber and an oil inlet chamber are provided in the pump body, the variable slider is arranged in the pump body, and the two sides of the variable slider are connected to the oil outlet chamber and the oil inlet chamber; a rotor chamber is provided in the middle of the variable slider, and the rotor is placed in the rotor chamber; a variable feedback chamber and a spring chamber for installing a variable spring are provided between the variable slider and the cavity wall of the pump body, and the position of the variable feedback chamber and the position of the spring chamber are opposite to each other; a first contact surface and a second contact surface are provided between the variable slider and the spring chamber, and a third contact surface and a fourth contact surface are provided between the variable slider and the variable feedback chamber, and a guide oil channel is provided along the spring chamber on the pump body, one end of the guide oil channel is connected to the oil outlet chamber, and the other end is connected to the second contact surface.

[0006] In one embodiment, the variable feedback chamber is communicated with the main oil channel or the pump outlet through an oil circuit.

[0007] In one embodiment, grooves are provided on the upper and lower end surfaces of the variable slider at positions corresponding to the oil outlet cavity and the oil inlet cavity respectively.

[0008] The beneficial effect of this utility model is to provide a vane pump that can reduce wear on the slider. By providing a guide oil channel on the pump body, the pressurized oil in the oil outlet chamber is introduced to the second contact surface, thereby enhancing the lubrication effect in this area and significantly reducing the wear between the variable slider and the pump body cavity wall. Due to the reduced wear, the operating efficiency of the vane pump is improved, the service life of the pump is extended, and the reliability of the entire hydraulic system is improved. The improvement of this utility model is only designed to add a guide oil channel to the pump body, without requiring major modifications to the overall structure of the pump, making it easy to implement and low-cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following is a brief introduction to the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0010] Figure 1 This is a schematic structural diagram of the vane pump capable of reducing slider wear according to the present invention.

[0011] The figures are marked as follows: 1. Pump body; 2. Variable spring; 3. Rotor; 4. Variable slider; 5. Variable feedback chamber; 6. Spring chamber; 7. First contact surface; 8. Second contact surface; 9. Third contact surface; 10. Fourth contact surface; 11. Guide oil channel; 12. Oil outlet chamber; 13. Oil inlet chamber. DETAILED DESCRIPTION

[0012] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing 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. Therefore, they should not be understood as limitations on the present invention.

[0013] Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, features qualified as "first," "second," etc., may explicitly or implicitly include one or more of such features. In the description of this utility model, unless otherwise specified, "plurality" means two or more.

[0014] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood broadly. For example, they may refer to fixed, removable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediary; and internal communication between two components. Those skilled in the art will understand the specific meanings of these terms in this utility model based on specific circumstances.

[0015] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0016] like Figure 1 As shown, this embodiment provides a vane pump that reduces slider wear. The pump comprises a pump body 1, a variable displacement spring 2, a rotor 3, and a variable displacement slider 4. The pump body 1 is internally provided with an oil outlet chamber 12 and an oil inlet chamber 13 for respectively delivering high-pressure oil and receiving low-pressure oil. The variable displacement slider 4 is disposed within the pump body 1, with its two sides connected to the oil outlet chamber 12 and the oil inlet chamber 13, respectively, to facilitate oil flow and pressure transmission.

[0017] A rotor cavity is provided in the middle of the variable slider 4, and the rotor 3 is installed in the rotor cavity. A sealing ring is provided between the rotor 3 and the rotor cavity to reduce oil leakage.

[0018] A variable feedback chamber 5 and a spring chamber 6 for installing a variable spring 2 are provided between the variable slider 4 and the cavity wall of the pump body 1. The position of the variable feedback chamber 5 and the position of the spring chamber 6 are opposite to each other. The variable spring 2 is used to provide elastic force for the variable slider 4 to move up and down.

[0019] A first contact surface 7 and a second contact surface 8 are provided between the variable slider 4 and the spring chamber 6. The contact surfaces are smoothly arranged to ensure smooth movement of the variable slider 4 in the pump body 1. A third contact surface 9 and a fourth contact surface 10 are provided between the variable slider 4 and the variable feedback chamber 5. The contact surfaces are smoothly arranged to ensure good contact performance.

[0020] A guide oil passage 11 is provided along the spring chamber 6 on the pump body 1. One end of the guide oil passage 11 is connected to the oil outlet chamber 12, and the other end is connected to the second contact surface 8. The guide oil passage 11 has a sufficient cross-sectional area to ensure that sufficient lubricating oil is provided from the oil outlet chamber 12 to the second contact surface 8, thereby introducing the hydraulic oil into the second contact surface 8 to enhance lubrication and reduce wear of the slider.

[0021] The variable feedback chamber 5 is connected to the main oil gallery via an oil circuit, enabling the variable slider 4 to dynamically adjust according to changes in system pressure, thereby achieving precise control of the pump's displacement. The variable slider's upper and lower end surfaces are each provided with waist-shaped grooves, corresponding to the oil outlet and inlet chambers, respectively. When the rotor is operating, oil can flow through the through-holes on the variable slider 4's circumference, ensuring that the operating meshing area is promptly filled with oil, thereby improving volumetric efficiency and reducing cavitation in high-speed ranges.

[0022] During the operation of the vane pump, the oil outlet chamber 12 is in a high-pressure state, the oil inlet chamber 13 is in a negative-pressure state, and the spring chamber 6 is also in a negative-pressure state when the first contact surface 7 and the second contact surface 8 are sealed. The spring chamber 6 and the oil inlet chamber 13 are both at low pressure, and the pressure oil cannot enter the contact surface for lubrication, which is very easy to wear the contact surface and affect the reliability of the oil pump. Therefore, the present invention provides a guide oil channel 11 on the pump body 1 to introduce the pressure oil in the oil outlet chamber 12 to the second contact surface 8, thereby enhancing the lubrication effect of this area and significantly reducing the wear between the variable slider 4 and the cavity wall of the pump body 1. Due to the reduced wear, the working efficiency of the vane pump is improved, while the service life of the pump is extended, and the reliability of the entire hydraulic system is improved. The improvement of the present invention is only designed to add a guide oil channel 11 to the pump body 1, without the need to significantly modify the overall structure of the pump. It is easy to implement and has low cost.

[0023] The above embodiments are preferred implementation schemes of the present invention. In addition, the present invention can also be implemented in other ways. Any obvious replacement without departing from the concept of the present technical solution is within the scope of the present invention patent.

[0024] In order to make it easier for ordinary technicians in this field to understand the improvements of the present invention over the prior art, some drawings and descriptions of the present invention have been simplified, and for the sake of clarity, some other elements are omitted in this application document. Ordinary technicians in this field should realize that these omitted elements may also constitute the content of the present invention.

Claims

1. A vane pump capable of reducing slider wear, comprising a pump body (1), a variable spring (2), a rotor (3) and a variable slider (4), characterized in that: The variable slider (4) is arranged in the pump body (1), and the pump body (1) is provided with an oil outlet cavity (12) and an oil inlet cavity (13), and the two sides of the variable slider (4) are connected to the oil outlet cavity (12) and the oil inlet cavity (13); a rotor cavity is provided in the middle of the variable slider (4), and the rotor (3) is placed in the rotor cavity; a variable feedback cavity (5) and a spring cavity (6) for installing a variable spring (2) are provided between the variable slider (4) and the cavity wall of the pump body (1), and the variable feedback cavity ( 5) and the position of the spring chamber (6) are opposite to each other; a first contact surface (7) and a second contact surface (8) are provided between the variable slider (4) and the spring chamber (6), and a third contact surface (9) and a fourth contact surface (10) are provided between the variable slider (4) and the variable feedback chamber (5); a guide oil passage (11) is provided on the pump body (1) along the spring chamber (6), one end of the guide oil passage (11) is connected to the oil outlet chamber (12), and the other end is connected to the second contact surface (8).

2. The vane pump according to claim 1, characterized in that The vane pump is a direct-push vane variable displacement pump.

3. The vane pump according to claim 1, characterized in that The variable feedback chamber (5) is communicated with the main oil channel or the pump outlet through an oil circuit.

4. The vane pump according to claim 1, characterized in that The upper and lower end surfaces of the variable slider (4) are provided with grooves at positions corresponding to the oil outlet cavity and the oil inlet cavity respectively.

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