Vane pump for lubrication

Abstract

The utility model relates to the technical field of lubricating systems, and discloses a vane pump for lubrication, which comprises a shell, one side of the shell is provided with a step-shaped accommodating cavity, two sides of the shell are respectively provided with an oil inlet hole and an oil outlet hole which are not communicated with each other, the oil inlet hole and the oil outlet hole are respectively connected with the accommodating cavity, a stator is arranged in an inner cavity of the shell, and the stator is connected with the shell. A rotor is installed in an inner cavity of the stator, and the stator and the rotating rotor form change of the area of a containing cavity so as to complete oil suction and oil discharge actions. Through precise design and optimized layout, the vane pump disclosed by the utility model is integrally designed to be cylindrical, the internal structure is compact, and the volume is effectively reduced; compared with a traditional large vane pump, the vane pump has the advantages that the manufacturing cost is reduced, the cost performance is improved, oil leakage and pump damage are effectively prevented in a limited space through the cambered surface design between the vane and the rotor, and therefore the overall service life of the vane pump is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of lubrication systems, in particular to a vane pump for lubrication. Background Art

[0002] A vane pump is a pump in which the vanes in the rotor grooves are in contact with the pump casing, pressing the sucked liquid from the oil inlet side to the oil discharge side. When the vane pump rotor rotates, the vanes are pressed against the inner surface of the stator under the action of centrifugal force and pressure oil. In this way, the working volume formed by the two vanes, the rotor and the inner surface of the stator first absorbs oil from small to large and then discharges oil from large to small. When the vanes rotate one circle, they complete two oil suction and discharge.

[0003] After searching, the Chinese patent number CN210715081U discloses a new vane pump, which relates to the field of vane pump technology and includes a pump body, wherein the two sides of the pump body are respectively provided with an oil suction port and an oil pressure port, the two sides of the pump body are respectively provided with an oil suction through hole and an oil pressure through hole, the top of the pump body is provided with a cavity, and springs are fixed on both sides of the cavity, and the ends of the springs are fixed with spring baffles. The utility model uses two sets of pistons to absorb oil from the oil suction port, causing the oil to rush upward to the piston on the left, causing the piston to squeeze the spring upward and enter the space between the blades. When the pump body stops sucking oil, the spring resets the piston to enter the oil suction through hole and the oil pressure through hole, thereby preventing oil leakage.

[0004] The above-mentioned vane pump needs to be equipped with a corresponding active lubrication system to achieve good heat dissipation and lubrication effects. In the lubrication system, the lubrication pump is the most core component. The quality of the lubrication pump is directly related to the life of the lubrication system and even the speed reducer. However, the above-mentioned vane pump generally has a large volume and also contains more structures, which not only causes high cost and low cost performance, but also makes the overall system heat up more seriously after carrying a large load, which seriously restricts the life of the product. Based on this, the utility model designs a lubricating vane pump to solve the above problems. Utility Model Content

[0005] The purpose of the utility model is to provide a vane pump for lubrication, which solves the problems of large volume and severe heat generation in the background technology.

[0006] In order to solve the above technical problems, the present invention provides the following technical solutions:

[0007] A lubricating vane pump includes a housing, a stepped cavity formed on one side of the housing, an oil inlet and an oil outlet formed on both sides of the housing, the oil inlet and the oil outlet being connected to the cavity, a stator mounted in the inner cavity of the housing, a rotor mounted in the inner cavity of the stator, and a change in the cavity area formed by the rotating rotor to achieve oil suction and discharge.

[0008] The outer wall and inner hole of the stator are both eccentrically designed, and the stator and the rotor are installed concentrically according to the outer wall. A spring is installed on one side of the rotor, and a blade is installed on one side of the spring. The rotation of the rotor drives the spring and the blade to rotate synchronously and completes the repeated compression and extension of the spring.

[0009] Preferably, a through hole is provided in the inner cavity of the shell and is used for fixing the shell, and the oil inlet is connected to an external oil tank.

[0010] Preferably, the rotor is fixedly connected to the output shaft of the external motor, the outer wall of the stator is provided with a waist groove and the area where the waist groove is located is semicircular, and a set screw is also installed in the inner cavity of the shell and the size of the set screw matches the size of the inner wall of the waist groove.

[0011] Preferably, the outer wall of the rotor is provided with rotor slots and the rotor slots are distributed in a plurality of circumferential arrays, the springs and blades are both installed in the inner cavity of the rotor slots and the springs are fixedly connected to the inner wall of the rotor slots.

[0012] Preferably, the thickness of the blade is the same as that of the rotor, and the contact portions of the blade and the rotor are both designed as cambered surfaces.

[0013] Preferably, an end cover is installed on one side of the shell, and the end cover is fixedly connected to the shell via a sealing ring to ensure the sealing of the interior of the shell.

[0014] Compared with the prior art, the beneficial effects achieved by the present invention are:

[0015] 1. Through precise design and optimized layout, the vane pump of the present invention is designed to be cylindrical as a whole, and has a compact internal structure, which effectively reduces the volume. Compared with traditional large vane pumps, it not only reduces the manufacturing cost and improves the cost performance, but also facilitates the use of the arc surface design between the vanes and the rotor in a limited space, as well as the repeated compression and extension of the spring, so that the vanes can fit tightly on the inner wall of the stator, effectively preventing oil leakage and damage to the pump, thereby improving the overall life of the product.

[0016] 2. Due to the miniaturization of the volume and optimization of the structure, the vane pump of the present invention generates relatively less heat during operation and has a better heat dissipation effect. At the same time, through the precise oil flow design and the compression and extension action of the vanes, the uniform distribution and effective circulation of the oil in the pump body are ensured, further improving the lubrication effect, which not only extends the service life of the pump, but also improves the stability and reliability of the entire lubrication system. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a front view of the structure of the utility model;

[0018] Figure 2 It is a right side view of the structure of the utility model;

[0019] Figure 3 This is a schematic diagram of the internal structure of the utility model;

[0020] Figure 4 For this utility model Figure 2 Internal cross-sectional view of .

[0021] Among them: 1. Shell; 2. Cavity; 3. Oil inlet hole; 4. Oil outlet hole; 5. Stator; 6. Rotor; 7. Spring; 8. Blade; 9. Through hole; 10. Waist groove; 11. Set screw; 12. Rotor groove; 13. End cover; 14. Sealing ring. DETAILED DESCRIPTION

[0022] 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.

[0023] Please refer to Figure 1-Figure 3 A lubricating vane pump includes a housing 1, a stepped cavity 2 is formed on one side of the housing 1, an oil inlet 3 and an oil outlet 4 are formed on both sides of the housing 1, and the oil inlet 3 and the oil outlet 4 are connected to the cavity 2 respectively. A stator 5 is installed in the inner cavity of the housing 1, and a rotor 6 is installed in the inner cavity of the stator 5. The rotor 6 forms a change in the area of ​​the cavity 2 with the rotating rotor 6 to complete the action of sucking and discharging oil;

[0024] The outer wall and inner hole of the stator 5 are both eccentrically designed, and the stator 5 and the rotor 6 are installed concentrically according to the outer wall. A spring 7 is installed on one side of the rotor 6, and a blade 8 is installed on one side of the spring 7. The rotation of the rotor 6 drives the spring 7 and the blade 8 to rotate synchronously and complete the repeated compression and extension of the spring 7.

[0025] The inner cavity of the shell 1 is provided with a through hole 9 for fixing the shell 1, the oil inlet 3 is connected to the external oil tank, the rotor 6 is fixedly connected to the output shaft of the external motor, the outer wall of the stator 5 is provided with a waist groove 10, and the area where the waist groove 10 is located is semicircular, and a set screw 11 is also installed in the inner cavity of the shell 1, and the size of the set screw 11 matches the inner wall size of the waist groove 10.

[0026] In this embodiment of the utility model, the vane pump is designed as a cylindrical structure. The housing 1 serves as the main structure, and within it is a precisely stepped chamber 2, which serves as the core area for the vane pump's oil suction and discharge operations. Separately, on either side of the housing 1 are a non-interconnected oil inlet 3 and an oil outlet 4. These two oil holes communicate with the chamber 2, allowing for the flow of oil in and out.

[0027] Please refer to Figures 1-4 The outer wall of the rotor 6 is provided with a rotor slot 12, and the rotor slot 12 is distributed in a plurality of circular arrays. The spring 7 and the blade 8 are both installed in the inner cavity of the rotor slot 12, and the spring 7 is fixedly connected to the inner wall of the rotor slot 12. The thickness of the blade 8 is the same as that of the rotor 6, and the contact part between the blade 8 and the rotor 6 is a curved surface design.

[0028] An end cover 13 is installed on one side of the housing 1 , and the end cover 13 is fixedly connected to the housing 1 via a sealing ring 14 to ensure the sealing of the interior of the housing 1 .

[0029] In the embodiment of the present invention, a stator 5 is installed in the inner cavity of the shell 1. The outer wall and inner hole of the stator 5 are both eccentrically designed. This design allows a variable volume inner cavity to be formed between the stator 5 and the rotating rotor 6. When the rotor 6 rotates, due to the eccentric design of the stator 5, the area of ​​the volume inner cavity will continue to change, thereby realizing the functions of oil suction and discharge. A spring 7 is installed on one side of the rotor 6, and a blade 8 is installed on one side of the spring 7. The rotation of the rotor 6 will drive the synchronous rotation of the spring 7 and the blade 8. During the rotation process, due to the eccentric design of the stator 5, the blade 8 will be repeatedly compressed and extended under the action of the spring 7. This action allows the blade 8 to fit tightly against the inner wall of the stator 5, thereby further ensuring the sealing of the volume inner cavity.

[0030] During operation, when the vane pump begins operating, the oil inlet 3 is connected to the external oil tank, allowing oil to enter the chamber 2 through the oil inlet 3. At this point, the rotor 6 is driven by the output shaft of the external motor to rotate. As rotor 6 rotates, the vanes 8, acted upon by spring 7, compress and extend, causing the area of ​​the internal chamber to continuously change. When the area of ​​the internal chamber decreases, the oil is compressed and discharged through the oil outlet 4. When the area of ​​the internal chamber increases, the oil is drawn into the chamber 2, thus achieving continuous oil suction and discharge in the vane pump.

[0031] In addition, the outer wall of the stator 5 is provided with a semicircular groove 10. A set screw 11 is installed in the inner cavity of the housing 1, and its size matches the inner wall size of the groove 10. When the power input of the pump changes direction, the stator 5 rotates due to the friction of the rotor 6; however, when the stator 5 rotates to the point where the set screw 11 is fixed, the stator 5 will stop rotating. At this time, the position of the stator 5 just makes the compression and extension of the vanes 8 match the suction and discharge ports properly. In this way, even if the rotation direction of the power input of the pump changes, the suction and discharge ports can remain unchanged, thus ensuring the stable operation of the vane pump.

[0032] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A vane pump for lubrication, comprising a housing (1), characterized in that: A cavity (2) is provided on one side of the shell (1), and the cavity (2) is a step-shaped cavity. An oil inlet hole (3) and an oil outlet hole (4) that are not connected are provided on both sides of the shell (1), and the oil inlet hole (3) and the oil outlet hole (4) are respectively connected to the cavity (2). A stator (5) is installed in the inner cavity of the shell (1), and a rotor (6) is installed in the inner cavity of the stator (5). The rotor (6) forms a change in the area of ​​the cavity (2) with the rotating rotor (6) to complete the action of sucking and discharging oil. The outer wall and the inner hole of the stator (5) are both eccentrically designed, and the stator (5) and the rotor (6) are installed concentrically according to the outer wall. A spring (7) is installed on one side of the rotor (6), and a blade (8) is installed on one side of the spring (7). The rotation of the rotor (6) drives the spring (7) and the blade (8) to rotate synchronously and complete the repeated compression and extension of the spring (7).

2. A lubricating vane pump according to claim 1, characterized in that: The inner cavity of the housing (1) is provided with a through hole (9) for fixing the housing (1), and the oil inlet hole (3) is connected to an external oil tank.

3. The lubricating vane pump according to claim 1, characterized in that: The rotor (6) is fixedly connected to the output shaft of the external motor, the outer wall of the stator (5) is provided with a waist groove (10), and the area where the waist groove (10) is located is semicircular, and a set screw (11) is also installed in the inner cavity of the shell (1), and the size of the set screw (11) matches the size of the inner wall of the waist groove (10).

4. The lubricating vane pump according to claim 1, characterized in that: The outer wall of the rotor (6) is provided with a rotor slot (12), and the rotor slot (12) is distributed in a plurality of groups of circumferential arrays. The spring (7) and the blade (8) are both installed in the inner cavity of the rotor slot (12), and the spring (7) is fixedly connected to the inner wall of the rotor slot (12).

5. The lubricating vane pump according to claim 1, characterized in that: The thickness of the blade (8) is the same as that of the rotor (6), and the contact portions of the blade (8) and the rotor (6) are both designed as cambered surfaces.

6. The lubricating vane pump according to claim 1, characterized in that: An end cover (13) is installed on one side of the housing (1), and the end cover (13) is fixedly connected to the housing (1) via a sealing ring (14) to ensure the sealing inside the housing (1).

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