A friction-reducing vane pump stator

Abstract

This utility model discloses a friction-reducing vane pump stator, including a fixed outer frame, a shock-absorbing structure, a cooling structure, an inner shell, and a sealing shell. The cooling structure, used to absorb heat generated by friction between the inner shell and the stator, is located inside the fixed outer frame and concentrically positioned with it. A mounting groove is provided between the fixed outer frame and the cooling structure. A shock-absorbing structure, used to absorb vibration energy between the fixed outer frame and the cooling structure, is located within the mounting groove. One end of the shock-absorbing structure is connected to the inner surface of the fixed outer frame, and the other end is connected to the outer surface of the shock-absorbing structure. The inner surface of the cooling structure is connected to the inner shell, and the inner surface of the inner shell is provided with an oil reservoir to reduce friction. Advantages: It achieves shock absorption during vane-stator friction and cools the stator to reduce thermal deformation.

Description

Technical Field

[0001] This invention relates to the field of vane pump technology, and particularly to a vane pump stator that reduces friction. Background Technology

[0002] When the rotor of the vane pump rotates, the vanes, under the action of centrifugal force and pressurized oil, have their tips pressed tightly against the inner surface of the stator. The working volume formed by the two vanes, the rotor, and the inner surface of the stator first increases in volume to draw in oil, then decreases in volume to discharge oil. One rotation of the vane completes one cycle of oil intake and discharge. During the operation of the vane pump, the vanes contact and cooperate with the stator to form a sealed cavity. As the vanes rotate, oil is discharged from the suction cavity to the pressure cavity. Throughout this process, the vanes remain in continuous contact with the stator.

[0003] Chinese patent CN212177410U discloses a vane pump stator that reduces friction and improves service life. The stator includes a cylindrical body with grooves on its inner wall for oil storage. By creating these grooves on the inner wall of the stator, the vanes are lubricated by the oil stored in the grooves when in contact with the stator's inner wall. This reduces friction and heat generation between the stator and vanes, thereby improving the service life of the stator, vanes, and vane pump.

[0004] However, this application cannot achieve the cooling treatment to reduce vibration and thermal deformation when the blades rub against the stator. Utility Model Content

[0005] The technical problem to be solved by this utility model is to reduce vibration when the blades rub against the stator and to cool the stator to reduce thermal deformation.

[0006] To address the aforementioned technical problems, a friction-reducing vane pump stator is proposed; this is achieved through the following technical solution:

[0007] It includes a fixed outer frame, a shock-absorbing structure, a cooling structure, and an inner shell. The cooling structure, which absorbs the heat generated by friction of the inner shell, is located inside the fixed outer frame and is concentric with the fixed outer frame. A mounting groove is provided between the fixed outer frame and the cooling structure. A shock-absorbing structure is provided in the mounting groove to absorb the vibration energy between the fixed outer frame and the cooling structure. One end of the shock-absorbing structure is connected to the inner surface of the fixed outer frame, and the other end is connected to the outer surface of the cooling structure. The inner surface of the cooling structure is connected to the inner shell, and an oil reservoir is provided on the inner surface of the inner shell to reduce friction.

[0008] The vibration damping structure reduces the energy generated by vibration between the fixed outer frame and the cooling structure, thereby reducing the noise generated by the entire vane pump. When the vane and stator generate heat due to long-term friction, the cooling structure cools the inner shell that is in contact with the vane, thus ensuring that the vane can still contact the inner shell after long-term use, reducing the impact of thermal deformation and the possibility of oil leakage. The oil reservoir allows the oil transported by the vane pump to remain on the inner surface of the inner shell, thereby reducing the friction between the vane and the inner surface of the inner shell.

[0009] In a preferred embodiment of the present invention, the shock-absorbing structure includes a spring and a damper. The two ends of the damper are connected to the inner surface of the fixed outer frame and the outer surface of the cooling structure, respectively. The spring is sleeved on the damper, and the spring, in conjunction with the damper, absorbs the vibration energy generated between the fixed outer frame 1 and the cooling structure.

[0010] In a preferred embodiment of the present invention, a sealing shell is connected above the position where the shock-absorbing structure is installed between the fixed outer frame and the cooling structure to protect the shock-absorbing structure. The outer surface of the sealing shell is connected to the inner surface of the fixed outer frame, and the inner surface of the sealing shell is connected to the outer surface of the cooling structure, so as to prevent the internal shock-absorbing structure from being damaged during the use of the stator.

[0011] In a preferred embodiment of the present invention, the cooling structure includes a connecting block, a locking block, a sealing strip, and a water inlet. The connecting block is installed inside the fixed outer frame and connected to the inner surface of the fixed outer frame through a shock-absorbing structure. The outer side of the connecting block is fixedly connected to the sealing shell. A slot for installing the locking block is provided inside the connecting block. One end of the locking block is threadedly connected to the bottom of the slot of the connecting block. A cavity for storing cooling water is formed between the locking block and the connecting block. A sealing strip is provided at the connection point of the two ends of the connecting block and the locking block. A water inlet is provided on the side of the locking block. By adding cooling water into the cooling structure, the stator can achieve cooling of the contact surface between the stator and the blades during the operation of the vane pump.

[0012] In a preferred embodiment of the present invention, the sides of the card block and the connecting block are provided with multiple sealing structures to prevent water from flowing out of the cooling structure and affecting the operation of the vane pump.

[0013] In a preferred embodiment of the present invention, the sealing structure includes two fixing grooves, a limiting plate, a sealing plug, and a nut. A fixing groove is provided on the side of both the connecting block and the locking block. The two fixing grooves are respectively located on both sides of the water inlet. The two ends of the limiting plate correspond to the two fixing grooves respectively. The two ends of the limiting plate are connected to the fixing grooves via nuts. A sealing plug, adapted to the water inlet, is provided at the middle position of the surface of the limiting plate that contacts the locking block, for sealing the cooling structure. The nuts fix the relative positions of the connecting block and the locking block, while the sealing plug seals the water inlet to prevent liquid from flowing out of the cooling structure.

[0014] In a preferred embodiment of the present invention, an oil outlet and an oil inlet are provided through the fixed outer frame, the cooling structure, and the inner shell. An oil outlet pipe and an oil inlet pipe are respectively connected to the oil outlet and the oil inlet pipe. The oil outlet pipe and the oil inlet pipe are sealed to the oil outlet and the oil inlet pipe. The oil outlet pipe and the oil inlet pipe pass through the inner shell, the cooling structure, and the fixed outer frame to prevent oil from entering the stator and affecting normal operation.

[0015] In a preferred embodiment of the present invention, a mounting hole for the rotor to pass through is provided at the bottom center of the fixed outer frame for mounting the rotor that is used in conjunction with the stator.

[0016] The advantages of this utility model compared with the prior art are:

[0017] 1. By using a shock-absorbing structure, the energy generated by vibration between the fixed outer frame and the cooling structure is reduced, thereby reducing the noise generated by the entire vane pump.

[0018] 2. When the blades and stator generate heat through prolonged friction, the cooling structure cools the inner shell that is in contact with the blades, thus ensuring that the blades can remain in contact with the inner shell even after prolonged use, reducing the impact of thermal deformation and the possibility of oil leakage.

[0019] 3. The oil reservoir allows the oil pumped by the vane pump to remain on the inner surface of the inner casing, thereby reducing the friction between the vanes and the inner surface of the inner casing.

[0020] 4. If the inner shell deforms due to heat after prolonged use, it can be removed and replaced with a new one. Attached Figure Description

[0021] Figure 1 The figure shown is a three-dimensional structural diagram of a friction-reducing vane pump stator according to this utility model. Figure 1 ;

[0022] Figure 2 The figure shown is a three-dimensional structural diagram of the open sealing shell of a vane pump stator for reducing friction according to this utility model.

[0023] Figure 3 The diagram shown is a schematic diagram of the stator of a vane pump with reduced friction, without the installation of a sealing structure.

[0024] Figure 4 The figure shown is a cross-sectional view of a vane pump stator for reducing friction according to this utility model.

[0025] Figure 5 The diagram shows a sealing structure of a vane pump stator that reduces friction according to this invention.

[0026] Explanation of reference numerals in the attached drawings: 1. Fixed outer frame; 2. Shock absorption structure; 21. Spring; 22. Damper; 3. Cooling structure; 31. Connecting block; 32. Locking block; 33. Sealing strip; 34. Water inlet; 35. Slot; 4. Inner shell; 5. Sealing shell; 6. Mounting slot; 7. Oil reservoir; 8. Sealing structure; 81. Fixing slot; 82. Limiting plate; 83. Sealing plug; 84. Nut; 9. Oil outlet pipe; 10. Oil inlet pipe; 11. Mounting hole. Detailed Implementation

[0027] The following will refer to the appendix in the embodiments of this utility model. Figures 1-5 The technical solutions in the embodiments of this utility model will be described in detail below.

[0028] like Figure 1 and Figure 2 As shown, it includes a fixed outer frame 1, a shock-absorbing structure 2, a cooling structure 3, an inner shell 4, and a sealing shell 5. The fixed outer frame 1 is a cylindrical shell with a groove in the middle. The shock-absorbing structure 2, the cooling structure 3, and the inner shell 4 are installed inside the groove in the middle of the fixed outer frame 1. The fixed outer frame 1 has a mounting hole 11 at the middle of the bottom for the rotor to pass through and for connecting the rotor.

[0029] An installation groove 6 is formed between the fixed outer frame 1 and the cooling structure 3. A shock-absorbing structure 2 is provided in the installation groove 6. One end of the shock-absorbing structure 2 is welded to the inner surface of the installation groove 6 formed by the fixed outer frame 1, and the other end of the shock-absorbing structure 2 is welded to the outer surface of the cooling structure 3. When the blades rub against the stator, vibration is generated. The shock-absorbing structure 2 absorbs the vibration energy and plays a shock-absorbing role.

[0030] A sealing shell 5 is welded above the mounting groove 6 inside the fixed outer frame 1. One end of the outer surface of the sealing shell 5 is welded to the inner surface of the fixed outer frame 1, and the other end of the inner surface is welded to the outer surface of the cooling structure 3, so as to protect the vibration structure installed between the fixed outer frame 1 and the cooling structure 3.

[0031] The inner surface of the cooling structure 3 is welded with an inner shell 4. When the inner shell 4 rubs against the blades and generates heat, the cooling structure 3 absorbs the heat from the inner shell 4, reducing the possibility of the inner shell 4 being deformed by heat.

[0032] The inner shell 4 is provided with an oil reservoir 7 to reduce friction. When the vane pump passes through the oil, the oil will stay in the oil reservoir 7 to reduce the friction between the vane and the inner shell 4. The oil reservoir 7 can be a circular groove or a square groove that is evenly distributed on the inner surface of the inner shell 4.

[0033] In this embodiment, four sets of damping structures 2 are uniformly welded between the fixed outer frame 1 and the cooling structure 3. The damping structure 2 includes a spring 21 and a damper 22. One end of the damper 22 is connected to the inner surface of the fixed outer frame 1 by a screw, and the other end of the damper 22 is connected to the outer surface of the cooling structure 3 by a screw. The spring 21 is sleeved on the damper 22. When the inner shell 4 rubs against the blade, the inner shell 4 vibrates with the cooling structure 3. The damper 22 and the spring 21 absorb the vibration energy and play a damping role.

[0034] An annular sealing shell 5 is connected to the surface of the mounting groove 6 between the fixed outer frame 1 and the cooling structure 3. One side of the sealing shell 5 is welded to the fixed outer frame 1, and the other side of the sealing shell 5 is welded to the cooling structure 3, so that the entire sealing shell 5 seals the space between the fixed outer frame 1 and the cooling structure 3, so that the shock absorption structure 2 will not be affected and damaged when the vane pump is working.

[0035] The cooling structure 3 includes a connecting block 31, a locking block 32, a sealing strip 33, and a water inlet 34. The connecting block 31 is a cylindrical body with a locking groove 35 on the inner surface near the fixed outer frame 1. The locking block 32 is installed in the locking groove 35. The side of the locking block 32 corresponding to the locking groove 35 has an empty compartment for storing cooling water. The locking block 32 is threadedly connected to the locking groove 35 of the connecting block 31. The lower end of the locking block 32 and the bottom of the locking groove 35 of the connecting block 31 are connected by threads. The side of the locking block 32 and the connecting block 31 are connected by a sealing structure 8. By opening the sealing structure 8, the locking block 32 can be turned out of the connecting block 31. The long-term used locking block 32 and the long-term friction inner shell 4 can be replaced, so that the stator can be reused. When the stator and rotor stop working, when the locking block 32 is turned out of the connecting block 31, the internal cooling water flows out. After replacing the new locking block 32 and the inner shell 4, the cooling water is replenished to the inside through the water inlet 34.

[0036] A circular sealing strip 33 is affixed to the connection between the two ends of the slot 35 and the block 32 to ensure that the internal cooling water will not flow out and affect the normal operation of the vane pump.

[0037] The side of the card block 32 is provided with a water inlet 34. By adding cooling water into the cooling structure 3, the stator can achieve cooling of the contact surface between the stator and the blades during the operation of the vane pump, reducing the possibility of thermal deformation. In this embodiment, four water inlets 34 are evenly provided on the side of the card block 32 to ensure that cooling water can be easily added into the stator from different positions.

[0038] In this embodiment, four sealing structures 8 are provided corresponding to the water inlet 34. Each sealing structure 8 includes two fixing grooves 81, a limiting plate 82, a sealing plug 83, and a nut 84. The two fixing grooves 81 are respectively provided on the locking block 32 and the connecting block 31. The two fixing grooves 81 are collinear with the water inlet 34 and are respectively opened on both sides of the water inlet 34. The two ends of the limiting plate 82 correspond to the two fixing grooves 81 respectively. The two ends of the limiting plate 82 are fixedly connected to the fixing grooves 81 using two nuts 84. The positions of the fixing block 32 and the connecting block 31 are fixed to prevent the connection from becoming loose.

[0039] A sealing plug 83 is welded to the lower surface of the limiting plate 82. When the limiting plate 82 and the fixing groove 81 are fixedly installed by the nut 84, the sealing plug 83 seals the water inlet 34 to prevent cooling water leakage.

[0040] An oil outlet and an oil inlet are provided through the fixed outer frame 1, the cooling structure 3 and the inner shell 4. An oil outlet pipe 9 and an oil inlet pipe 10 are respectively connected to the oil outlet and the oil inlet. The oil outlet pipe 9 and the oil inlet pipe 10 are welded to the oil outlet and the oil inlet to ensure the sealing of the connection between the oil outlet pipe 9 and the oil inlet pipe 10 and the oil outlet and the oil inlet, so as to prevent the coolant in the cooling structure 3 from leaking out and affecting the operation of the stator.

[0041] Working principle:

[0042] When the vane pump is working, the friction between the vanes and the inner surface of the stator inner shell 4 generates heat, which may cause thermal deformation of the inner shell 4. Therefore, a cooling structure 3 is set on the outside of the inner shell 4. The cooling structure 3 absorbs the heat generated by the friction of the inner shell 4 and reduces the possibility of thermal deformation of the inner shell 4. When the inner shell 4 is used for a long time and the thermal deformation is severe, the sealing structure 8 can be opened, and the locking block 32 can be turned out to disassemble and replace the inner shell 4 together. The shock absorption structure 2 absorbs the vibration energy of the stator and reduces the noise of the entire vane pump. The oil storage groove 7 set on the inner surface of the inner shell 4 allows the oil transported inside the vane pump to stay in the oil storage groove 7 when the vane pump is working, which plays a lubricating role on the inner shell 4 and makes the friction between the inner shell 4 and the vanes smaller.

[0043] The above embodiments are only for illustrating the technical concept of this utility model and should not be construed as limiting the scope of protection of this utility model. Any modifications made to the technical solution based on the technical concept proposed by this utility model shall fall within the scope of protection of this utility model.

Claims

1. A friction-reducing stator for a vane pump, characterized in that: The device includes a fixed outer frame (1), a shock-absorbing structure (2), a cooling structure (3), and an inner shell (4). The cooling structure (3), which absorbs the heat generated by friction of the inner shell (4), is located inside the fixed outer frame (1) and is concentric with the fixed outer frame (1). An installation groove (6) is provided between the fixed outer frame (1) and the cooling structure (3). A shock-absorbing structure (2), which absorbs the vibration energy between the fixed outer frame (1) and the cooling structure (3), is provided in the installation groove (6). One end of the shock-absorbing structure (2) is connected to the inner surface of the fixed outer frame (1), and the other end is connected to the outer surface of the cooling structure (3). The inner surface of the cooling structure (3) is connected to the inner shell (4). An oil storage groove (7) is provided on the inner surface of the inner shell (4) to reduce friction.

2. The friction-reducing vane pump stator according to claim 1, characterized in that: The damping structure (2) includes a spring (21) and a damper (22). The two ends of the damper (22) are connected to the inner surface of the fixed outer frame (1) and the outer surface of the cooling structure (3), respectively. The spring (21) is sleeved on the damper (22).

3. The friction-reducing vane pump stator according to claim 1, characterized in that: A sealing shell (5) is connected above the position where the shock-absorbing structure (2) is installed between the fixed outer frame (1) and the cooling structure (3). The outer surface of the sealing shell (5) is connected to the inner surface of the fixed outer frame (1), and the inner surface of the sealing shell (5) is connected to the outer surface of the cooling structure (3).

4. The friction-reducing vane pump stator according to claim 1, characterized in that: The cooling structure (3) includes a connecting block (31), a locking block (32), a sealing strip (33), and a water inlet (34). The connecting block (31) is installed inside the fixed outer frame (1) and connected to the inner surface of the fixed outer frame (1) through a shock-absorbing structure (2). The outer side of the connecting block (31) is fixedly connected to the sealing shell (5). The connecting block (31) has a slot (35) for installing the locking block (32) inside. One end of the locking block (32) is threaded to the bottom of the slot (35) of the connecting block (31). A cavity for storing cooling water is formed between the locking block (32) and the connecting block (31). A sealing strip (33) is provided at the connection between the two ends of the connecting block (31) and the locking block (32). A water inlet (34) is provided on the side of the locking block (32).

5. The friction-reducing vane pump stator according to claim 4, characterized in that: Multiple sealing structures (8) are provided on the sides of the card block (32) and the connecting block (31).

6. The friction-reducing vane pump stator according to claim 5, characterized in that: The sealing structure (8) includes two fixing grooves (81), a limiting plate (82), a sealing plug (83) and a nut (84). A fixing groove (81) is provided on the side of the connecting block (31) and the locking block (32). The two fixing grooves (81) are respectively located on both sides of the water inlet (34). The two ends of the limiting plate (82) correspond to the two fixing grooves (81) respectively. The two ends of the limiting plate (82) are connected to the fixing grooves (81) through nuts (84). A sealing plug (83) adapted to the water inlet (34) for sealing the cooling structure (3) is provided at the middle position of the surface of the limiting plate (82) in contact with the locking block (32).

7. The friction-reducing vane pump stator according to claim 1, characterized in that: An oil outlet and an oil inlet are provided through the fixed outer frame (1), cooling structure (3) and inner shell (4). An oil outlet pipe (9) and an oil inlet pipe (10) are respectively connected to the oil outlet and the oil inlet. The oil outlet pipe (9) and the oil inlet pipe (10) are sealed to the oil outlet and the oil inlet.

8. The friction-reducing vane pump stator according to claim 1, characterized in that: The bottom center of the fixed outer frame (1) is provided with a mounting hole (11) for the rotor to pass through.

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