A U-shaped combined vane for axially and radially positioned vane pump

Abstract

The U-shaped combined vane for axially and radially positioned vane pumps of the present invention comprises a vane and a ball; the vane comprises a working body, and a positioning portion is respectively provided at both ends of the working body to form a U-shaped structure for the vane; in the working state, the vane in the U-shaped structure cooperates with the U-shaped radial groove correspondingly provided on the rotor of the vane pump, and can slide in the radial direction of the rotor, and the two positioning portions of the vane respectively form a limiting structure with the rotor to achieve axial positioning of the vane; a ball installation slot is respectively provided on the outer surface of the two positioning portions of the vane, and a ball of matching size is installed in the ball installation slot, and in the working state, the ball rolls with the track slot provided in the pump body, and can only roll in the track slot to achieve radial positioning of the vane. The vane pump adopts this combined vane, and the vane is positioned in both the axial and radial directions, and can achieve contactless operation of the vane and the pump body to avoid heat and wear.

Description

Technical Field

[0001] The invention relates to a core component of a vane pump, in particular to a U-shaped combined vane for an axially positioned and radially positioned vane pump. Background Art

[0002] The vane pump is a fluid conveying machine with superior performance and wide application. It is mainly used for the transportation of refined oil in places such as trains, docks, and oil tankers. The structure of the vane pump includes a pump housing (pump body), a rotor, and a vane, among which the most critical part is the vane. Conventional vanes are in a straight line shape, and the outer end is in contact with the pump housing. Since direct contact is sliding friction, it will cause heat and wear after long-term operation, reduce power, and reduce the efficiency of pump operation. In addition, it will make the vane unreliable. Therefore, it is necessary to explore a non-contact working mode between the vane and the pump body, which requires solving the problem of axial and radial positioning of the vane. In addition, for the traditional working mode of contact between the vane and the pump body, by reducing the contact pressure and reducing the sliding friction, wear and heat can be reduced. From this perspective, it is also necessary to solve the problem of axial and radial positioning of the vane in this field. Summary of the invention

[0003] In order to solve the above technical problems, the present invention provides a U-shaped combined vane for an axially positioned and radially positioned vane pump. The vane pump adopts the U-shaped combined vane of the present invention. When working, the vane is positioned in both the axial and radial directions, so that the vane and the pump body can operate without contact, avoiding heat and wear, or the contact pressure between the vane and the pump body can be controlled to a smaller value through reasonable design tolerance to reduce heat and wear.

[0004] The present invention provides the following technical solutions:

[0005] A U-shaped combined vane for an axially and radially positioned vane pump comprises a vane and a rolling ball used in combination; the vane comprises a working body, and a positioning portion is respectively provided at both ends of the working body to form the vane into a U-shaped structure; in a working state, the vane in the U-shaped structure cooperates with a U-shaped radial groove correspondingly provided on the rotor of the vane pump, and can slide in the radial direction of the rotor, and the two positioning portions of the vane respectively form a limiting structure with the rotor to achieve axial positioning of the vane; a rolling ball mounting groove is respectively provided on the outer sides of the two positioning portions of the vane, and a rolling ball of matching size is installed in the rolling ball mounting groove, and in a working state, the rolling ball rolls with a track groove provided in the pump body and can only roll in the track groove, thereby controlling the radial position of the vane in the rotor and achieving radial positioning of the vane.

[0006] Compared with the prior art, the U-shaped combined vane for axially and radially positioned vane pumps of the present invention has achieved the following significant progress by adopting a newly designed structure: 1) Positioning parts are set at both ends of the working body of the vane to form a U-shaped structure. When in use, they cooperate with the radial grooves correspondingly set on the rotor. The two positioning parts respectively form limiting structures with the rotor to achieve axial positioning of the vane and avoid axial movement of the vane and sliding friction with related components; 2) A rolling ball is provided on the positioning part of the vane. When working, the rolling ball moves along the track groove in the pump body to effectively control the position of the vane in the radial direction of the rotor to achieve radial positioning; therefore, the vane pump adopts the U-shaped combined vane of the present invention to achieve contactless operation of the vane and the pump body, avoid heat and wear caused by sliding friction, or control the contact pressure between the vane and the pump body to a smaller value through reasonable design of tolerances to reduce heat and wear.

[0007] Furthermore, in the aforementioned U-shaped combined vane for axially and radially positioned vane pump, the working body of the vane is in the shape of a straight rod, which is convenient for designing and manufacturing the vane pump and is conducive to industrial implementation.

[0008] Furthermore, in the aforementioned U-shaped combined vane for axially and radially positioned vane pump, a group of evenly distributed unloading grooves are provided on the working body. The purpose of reducing mass is achieved by providing the unloading grooves, so that the load of the vane pump is reduced during operation, thereby reducing energy consumption.

[0009] Furthermore, in the aforementioned U-shaped combined vane for the axially positioned and radially positioned vane pump, the unloading grooves may be distributed on the concave surface of the U-shaped structure.

[0010] Further, in the aforementioned U-shaped combined vane for axially positioned and radially positioned vane pump, the unloading groove is cylindrical, the diameter of the unloading groove is 1 / 2-3 / 4 of the width of the vane, and the height of the unloading groove is 1 / 2-3 / 4 of the height of the working body of the vane. During implementation, the relevant parameters can be determined according to the situation while ensuring the mechanical strength.

[0011] Furthermore, in the aforementioned U-shaped combined vane for axially positioned and radially positioned vane pump, the material of the ball can be lead oxide, silicon nitride or tungsten carbide. The ball made of the above materials has the advantages of hardness, wear resistance and long service life.

[0012] Furthermore, in the aforementioned U-shaped combined vane for the axially positioned and radially positioned vane pump, the radius of the rolling ball may be 10-13 mm.

[0013] Furthermore, in the aforementioned U-shaped combined vane for axially and radially positioned vane pump, the cross-section of the ball mounting notch is rectangular and filled with extreme pressure concentrated cutting fluid. The extreme pressure concentrated cutting fluid is provided to play a lubricating role and prolong the service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural schematic diagram of a U-shaped combined vane for an axially positioned and radially positioned vane pump of the present invention;

[0015] Figure 2 yes Figure 1 C-direction view of the middle U-shaped combined slide;

[0016] Figure 3 yes Figure 2 D-direction cross-section of the middle U-shaped combined sliding vane;

[0017] Figure 4 is a schematic diagram of the structure of a vane pump in an embodiment of the present invention;

[0018] Figure 5 yes Figure 4 A magnified view of the structure of the circled part;

[0019] Figure 6 yes Figure 4 Sectional view of the middle vane pump in the direction of A;

[0020] Figure 7 yes Figure 4 Sectional view of the middle vane pump in the direction of B;

[0021] Figure 8 Schematic diagram of the state of the vane, rotor, pump body and sealing plate in the embodiment.

[0022] Markings in the attached drawings are: 1-slide, 101-working body, 1011-unloading groove, 102-positioning part, 1021-ball mounting groove; 2-ball; 3-rotor; 4-pump body; 5-track groove; 6-sealing plate. DETAILED DESCRIPTION

[0023] The present invention is further described below in conjunction with the accompanying drawings and embodiments, but is not intended to be limiting of the present invention. In the following embodiments, all that is not described in detail is conventional technical means or technical common sense in the art.

[0024] Example (see Figure 1-8 ):

[0025] This embodiment provides a vane pump, which adopts the U-shaped combined vane for the axially positioned and radially positioned vane pump of the present invention.

[0026] In this embodiment, the U-shaped combined vane for the axially positioned and radially positioned vane pump comprises a vane 1 and a ball 2 used in combination; the vane 1 comprises a working body 101, and a positioning portion 102 is respectively provided at both ends of the working body 101 to form the vane 1 into a U-shaped structure; in the working state, the vane 1 with the U-shaped structure cooperates with the U-shaped radial groove correspondingly arranged on the rotor 3 of the vane pump, and can slide in the radial direction of the rotor 3, and the two positioning portions 102 of the vane 1 respectively form a limiting structure with the rotor 3 to realize the axial positioning of the vane 1; a ball mounting groove 1021 is respectively provided on the outer surface of the two positioning portions 102 of the vane 1, and a ball 2 of matching size is installed in the ball mounting groove 1021, and in the working state, the ball 2 rolls with the track groove 5 arranged in the pump body 4, and can only roll in the track groove 5, so as to control the radial position of the vane 1 in the rotor 3 and realize the radial positioning of the vane 1.

[0027] In this embodiment, the working body 101 of the sliding plate 1 is in the shape of a straight rod.

[0028] In this embodiment, a group of evenly distributed unloading grooves 1011 are provided on the working body 101. By providing the unloading grooves 1011, the mechanical strength of the slide 1 is maintained while the mass is effectively reduced, thereby reducing the load during operation and reducing energy consumption. At the same time, the small mass brings smaller inertia, which is conducive to the smooth operation of the slide mechanism.

[0029] In this embodiment, the unloading grooves 1011 are distributed on the concave surface of the U-shaped structure.

[0030] In this embodiment, the unloading groove 1011 is cylindrical, the diameter of the unloading groove 1011 is 3 / 4 of the width of the sliding plate, and the height of the unloading groove 1011 is 3 / 4 of the height of the working body 101 of the sliding plate 1.

[0031] In this embodiment, the material of the ball 2 is silicon nitride. When implementing the technical solution of the present invention, the ball 2 can also be made of other wear-resistant hard materials, such as lead oxide, tungsten carbide, etc.

[0032] In this embodiment, the radius of the rolling ball 2 is 13 mm. When implementing the present invention, the size of the rolling ball 2 can be determined according to the specifications of the vane pump.

[0033] In this embodiment, the cross-section of the ball installation slot 1021 is rectangular and filled with extreme pressure concentrated cutting fluid. The lubrication structure is provided to prevent the ball from being worn.

[0034] In this embodiment, the vane 1, the ball 2, the rotor 3 and the sealing plate 6 (the track groove 5 is arranged on the sealing plate 6) constitute a vane mechanism; when working, the rotor 3 rotates, and the vane 1 rotates around the rotor axis with the rotor 3. At the same time, the vane 1 drives the ball 2 to roll along the track groove 5, so that the vane 1 slides in the radial direction of the rotor 3, keeps close to the pump body 4 and has a gap d.

[0035] The radial position of the vane 1 in the rotor 3 is determined by the ball 2 and the track groove 5. During operation, the ball 2 moves along the track groove 5, and the vane 1 rotates around the rotor axis. Under the action of the ball 2, the vane 1 slides along the U-shaped radial groove on the rotor 3, and keeps close to the pump body 4 with a gap d. The existence of the gap d effectively avoids the sliding friction between the vane 1 and the pump body 4, thereby effectively avoiding the generation of wear and heat.

[0036] In this embodiment, the gap d is 3 mm. If the gap d is too large, the pump may not work properly. Considering performance and manufacturing factors, it is better to control the gap d to about 3 mm.

[0037] In this embodiment, the number of the sliding vanes 1 is 3, which are evenly distributed along the circumference of the rotor 3. That is, they are distributed at an interval of 120°. In this embodiment, the number of sliding vanes 1 is small, which is conducive to controlling costs.

[0038] In this embodiment, the track groove 5 is a circular groove eccentrically arranged relative to the driving shaft of the rotor.

[0039] It should be pointed out that the U-shaped combined vane for the vane pump of the present invention is not limited to the application in the above-mentioned embodiment, and can also be applied to other vane pumps. For example, the vane 1 and the pump body 4 are designed to be in contact and fit, as long as the tolerance is reasonably designed to ensure that the pump can run smoothly. The U-shaped combined vane of the present invention is used, and the vane 1 is radially positioned by reasonably designing the tolerance, so that the pressure between the vane 1 and the inner wall of the pump body 4 can be lower than that of the prior art, thereby reducing friction, wear and heat.

[0040] It should also be pointed out that there are many types of vane pumps, and as long as the U-shaped combined vane of the present invention is applied, they all fall within the protection scope of the present invention.

[0041] In the present invention, the above terms “radial direction” and “axial direction” are all relative to the driving shaft of the rotor 2 .

[0042] The above general description of the invention involved in this application and the description of its specific implementation methods should not be understood as limiting the technical solutions of the invention. Based on the disclosure of this application, those skilled in the art can add, reduce or combine the disclosed technical features in the above general description and / or specific implementation methods (including examples) without violating the constituent elements of the invention involved, to form other technical solutions within the scope of protection of this application.

Claims

1. A U-shaped combined vane for an axially positioned and radially positioned vane pump, characterized in that: The invention comprises a sliding vane (1) and a rolling ball (2) used in combination; the sliding vane (1) comprises a working body (101), and a positioning portion (102) is respectively provided at both ends of the working body (101) so that the sliding vane (1) forms a U-shaped structure; in a working state, the sliding vane (1) in the U-shaped structure cooperates with a corresponding U-shaped radial sliding groove provided on a rotor (3) of a sliding vane pump, and can slide in the radial direction of the rotor (3), and the two positioning portions (102) of the sliding vane (1) respectively form a limiting joint with the rotor (3). The structure realizes axial positioning of the vane (1); each of the two positioning parts (102) of the vane (1) is provided with a ball installation slot (1021) on the outer side, and a ball (2) of matching size is installed in the ball installation slot (1021); in the working state, the ball (2) rolls in cooperation with a track slot (5) provided in the pump body (4) and can only roll in the track slot (5), thereby controlling the radial position of the vane (1) on the rotor (3), and realizing radial positioning of the vane (1); During operation, the ball (2) moves along the track groove (5), and the vane (1) rotates around the rotor shaft. Under the action of the ball (2), the vane (1) slides along the U-shaped radial groove on the rotor (3), and remains close to the pump body (4) with a gap d.

2. The U-shaped combined vane for axially and radially positioned vane pump according to claim 1, characterized in that: The working body (101) of the sliding plate (1) is in the shape of a straight rod.

3. The U-shaped combined vane for axially and radially positioned vane pump according to claim 2, characterized in that: The working body (101) is provided with a group of evenly distributed unloading grooves (1011).

4. The U-shaped combined vane for axially and radially positioned vane pump according to claim 3, characterized in that: The unloading grooves (1011) are distributed on the concave surface of the U-shaped structure.

5. The U-shaped combined vane for axially and radially positioned vane pump according to claim 3 or 4, characterized in that: The unloading groove (1011) is cylindrical, the diameter of the unloading groove (1011) is 1 / 2-3 / 4 of the width of the sliding plate, and the height of the unloading groove (1011) is 1 / 2-3 / 4 of the height of the working body (101) of the sliding plate (1).

6. The U-shaped combined vane for axially and radially positioned vane pump according to claim 1, characterized in that: The material of the rolling ball (2) is lead oxide, silicon nitride or tungsten carbide.

7. The U-shaped combined vane for axially and radially positioned vane pump according to claim 6, characterized in that: The radius of the rolling ball (2) is 10-13 mm.

8. The U-shaped combined vane for axially and radially positioned vane pump according to claim 1, characterized in that: The cross-sectional shape of the ball mounting groove (1021) is rectangular and is filled with extreme pressure concentrated cutting fluid.

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