Shaft bushing for pump

Abstract

The utility model relates to the technical field of mechanical transmission, in particular to a shaft bushing for a pump, which comprises an outer bushing and an inner bushing, the inner bushing is embedded in the outer bushing, a shaft hole for accommodating a transmission shaft is arranged on the inner bushing, a buffer groove connected with the shaft hole is arranged on the inner bushing, and a buffer part in interference fit with the transmission shaft is embedded in the buffer groove. The outer lining is made of metal materials, and the inner lining is made of high polymer materials. The shaft bushing has the advantages that high strength, high hardness and good corrosion resistance are achieved, self-lubricating and buffering damping functions are achieved, the buffering grooves are discontinuously and intermittently arranged, buffering performance and structural strength are balanced, relative movement between the shaft bushing and a transmission shaft is reduced, the service life of equipment is prolonged, and operation efficiency is improved.

Description

Technical Field

[0001] This utility model belongs to the field of mechanical transmission technology, and in particular relates to a pump bushing. Background Technology

[0002] In submersible pumps, bushings play an important role in supporting, positioning, and reducing friction. In complex pumping environments, the impeller will shake during operation, causing the bushing to move relative to the drive shaft and wear the drive shaft. Therefore, the performance of the bushing is directly related to the operating efficiency and lifespan of the equipment.

[0003] Traditionally, bushings are mostly made of metal materials, such as copper, steel, and alloys. While these metal bushings possess a certain degree of strength and wear resistance, during long-term operation, due to continuous friction and compression with the drive shaft, as well as the effects of load and vibration, the metal bushing and drive shaft cannot achieve 100% fit between their mating surfaces. The two contact surfaces are prone to very small relative movements, leading to wear on the metal bushing and further wear on the drive shaft surface. This wear not only reduces equipment operating efficiency but can also cause problems such as vibration, noise, and malfunctions.

[0004] In recent years, ceramic composite bushings have been increasingly used in pump environments. With their high hardness, high wear resistance, and corrosion resistance, ceramic composite bushings have shown significant advantages in reducing wear and extending equipment life. However, ceramic composite bushings also have some inherent drawbacks, such as high brittleness and fragility, making them unable to withstand impact loads exceeding their own strength. In complex pump environments, especially under large impact loads or vibrations, ceramic composite bushings are prone to cracking or damage.

[0005] Therefore, improving the impact resistance and toughness of bushings while ensuring their wear resistance and corrosion resistance has become an important direction in current bushing research. Furthermore, it is necessary to consider the fit between the bushing and the drive shaft, and how to reduce the relative movement between them to further extend the service life of the equipment and improve operating efficiency. Utility Model Content

[0006] The purpose of this invention is to address the aforementioned problems in existing technologies by proposing a pump bushing.

[0007] The objective of this utility model can be achieved through the following technical solutions:

[0008] A pump bushing includes an outer bushing and an inner bushing, wherein the inner bushing is embedded inside the outer bushing. The inner bushing has a shaft hole for accommodating a drive shaft and providing support and protection for it. The inner wall of the inner bushing has several buffer grooves that connect with the shaft hole. The buffer grooves are inlaid with buffer parts that can interfere with the drive shaft. The outer bushing is made of metal, and the inner bushing is made of polymer material.

[0009] Preferably, the outer bushing is a hollow cylindrical shape, and the inner bushing has an annular groove, which is embedded in the inner cavity of the outer bushing.

[0010] Preferably, the shaft hole has several uniformly arranged keyways circumferentially, and the buffer groove is connected to the keyways.

[0011] Preferably, the buffer grooves are arranged intermittently and discontinuously.

[0012] Preferably, the buffer portion is U-shaped and closely attached to the outer peripheral surface of the buffer groove.

[0013] Preferably, the buffer groove is located at the end of the inner liner and connects to its end face.

[0014] Preferably, the outer bushing is made of tungsten steel, the inner bushing is made of engineering plastic, and the buffer part is made of flexible material, specifically rubber or resin.

[0015] Preferably, the axial depth of the buffer groove is greater than 3 mm.

[0016] Preferably, an annular step is formed between the outer peripheral surface of the outer bushing and the outer peripheral surface of the inner bushing.

[0017] Preferably, the edge of one end face of the inner liner is rounded.

[0018] Compared with the prior art, the present invention has the following advantages:

[0019] Through ingenious structural design and material selection, the shaft bushing of this pump achieves self-lubrication and shock absorption while ensuring high strength, high hardness, and good corrosion resistance, thus improving its impact resistance and toughness. The discontinuous and intermittent setting of the buffer groove maintains the necessary buffering and shock absorption capacity while reducing the weakening of the overall structural integrity of the inner bushing and reducing the relative movement between the bushing and the drive shaft, thereby further extending the service life of the equipment and improving operating efficiency. The shaft bushing of this pump is easy to install and maintain and has strong adaptability. Attached Figure Description

[0020] Figure 1 This is the overall isometric drawing of this utility model.

[0021] Figure 2 This is a schematic diagram showing the disassembled structure of this utility model.

[0022] Figure 3 This is a top view of the present invention.

[0023] Figure 4 This is a bottom view of the utility model.

[0024] Figure 5 yes Figure 3 Schematic diagram of the cross-sectional structure at point AA.

[0025] Figure 6 This is a cross-sectional structural diagram of one embodiment of the present invention.

[0026] In the figure, 1 is the outer bushing; 11 is the step; 2 is the inner bushing; 21 is the annular groove; 22 is the shaft hole; 22a is the keyway; 23 is the buffer groove; and 3 is the buffer section. Detailed Implementation

[0027] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0028] like Figures 1-5 As shown, in this embodiment, a pump bushing is provided, including an outer bushing 1 and an inner bushing 2. The inner bushing 2 is embedded in the outer bushing 1, and the two are tightly combined to form a robust and durable integral structure. The inner bushing 2 is provided with a shaft hole 22 for accommodating the drive shaft and providing support and protection for it. The inner wall of the inner bushing 2 is provided with a plurality of buffer grooves 23 that connect with the shaft hole 22. The buffer grooves 23 are inlaid with buffer parts 3 that can be interference-fitted with the drive shaft. The outer bushing 1 is made of metal, and the inner bushing 2 is made of polymer material.

[0029] The outer bushing 1 is made of metal, which has high strength, high hardness and good corrosion resistance. This material choice ensures that the bushing can maintain stable performance in harsh working environments.

[0030] Unlike the metal outer bushing 1, the inner bushing 2 is made of polymer material. The polymer material has excellent wear resistance, self-lubrication and corrosion resistance, which can significantly reduce the friction coefficient between the drive shaft and the bushing, and reduce wear and energy consumption.

[0031] On the inner wall of the inner bushing 2, several buffer grooves 23 are cleverly provided to connect with the shaft hole 22. The design of these buffer grooves 23 is intended to further enhance the buffering and shock absorption capacity of the bushing, so as to reduce the vibration and noise generated by the drive shaft when it is running at high speed;

[0032] Within the buffer groove 23, buffer parts 3 are embedded, which can achieve an interference fit with the drive shaft. These buffer parts 3 have excellent elasticity and wear resistance. The elasticity of the material of the buffer parts 3 is used to expand and deform the shaft hole 22 to fit on the drive shaft. When the shaft hole 22 returns to its original state, it generates a clamping force on the drive shaft. While ensuring the wear resistance and corrosion resistance of the bushing, it can effectively absorb and disperse the impact force to improve its toughness, avoid serious wear between the bushing and the drive shaft, thereby reducing the relative movement between the two, and further extending the service life of the equipment and improving the operating efficiency.

[0033] like Figure 2 As shown, in this embodiment, the outer bushing 1 is a hollow cylindrical shape, and the inner bushing 2 has an annular groove 21. The inner bushing 2 is embedded in the inner cavity of the outer bushing 1 through the annular groove 21.

[0034] The annular groove 21 not only enhances the structural strength of the inner bushing 2, but also provides precise positioning and stable support for its connection with the outer bushing 1, so as to ensure that the inner bushing 2 can be tightly and firmly embedded in the inner cavity of the outer bushing 1.

[0035] In this embodiment, the shaft hole 22 has a plurality of uniformly arranged keyways 22a circumferentially expanded, and the buffer groove 23 is connected to the keyways 22a.

[0036] The main function of the keyway 22a is to install the key on the drive shaft. The key is used to connect and fix the drive shaft to the parts on the shaft. These keyways 22a allow the drive shaft to be securely installed in the shaft hole 22 and to transmit torque or axial force through the key. The connection between the buffer groove 23 and the keyway 22a helps to reduce the friction and vibration between the bushing and the key on the drive shaft during rotation, thereby improving the stability and durability of the mechanical system.

[0037] Furthermore, the buffer groove 23 is intermittently arranged. By intermittently arranging the buffer groove 23, the necessary buffering and shock absorption capacity of the bushing can be maintained while preserving a certain degree of rigidity, reducing the weakening of the overall structural integrity of the inner bushing 2. This design helps to balance the relationship between buffering performance and structural strength. The intermittent buffer groove 23 can more effectively disperse and alleviate stress concentration generated during the operation of the drive shaft, helping to reduce material fatigue and damage caused by stress concentration, thereby improving the service life of the bushing.

[0038] In addition, the discontinuous intermittent setting allows the buffer groove 23 to be flexibly adjusted according to specific working conditions and the characteristics of the drive shaft. This design helps to meet the needs of various pump bushings in different working environments.

[0039] Furthermore, the buffer part 3 is U-shaped and closely attached to the outer peripheral surface of the buffer groove 23.

[0040] The U-shaped buffer portion 3 can more fully cover the outer circumference of the buffer groove 23, thus providing a larger contact area and a more uniform buffering effect, which helps to more effectively absorb and disperse the impact force and vibration generated by the drive shaft during operation. This tight fit helps prevent the buffer portion 3 from loosening or falling off during operation, thereby ensuring the long-term stable operation of the bushing. The U-shaped buffer portion 3 can better adapt to the shape and size of the buffer groove 23, thereby optimizing stress distribution.

[0041] Furthermore, the buffer groove 23 is located at the end of the inner bushing 2 and is connected to its end face. By placing the buffer groove 23 at the end of the inner bushing 2 and connecting it to its end face, the impact force and vibration generated by the drive shaft during operation can be absorbed and dispersed more effectively. This allows the buffer groove to act directly on the axial movement of the drive shaft, thereby improving the buffering efficiency and helping to prevent excessive displacement or deformation caused by the axial movement of the drive shaft, thus ensuring the long-term stable operation of the bushing.

[0042] The buffer groove 23 is set at the end of the inner bushing 2, which makes it easier to fill, install and remove the buffer part 3, and also makes it easier to assemble the drive shaft.

[0043] Furthermore, the outer bushing 1 is made of tungsten steel, the inner bushing 2 is made of engineering plastic, and the buffer part 3 is made of flexible material, specifically rubber or resin.

[0044] The outer bushing 1 is made of tungsten steel, which is known for its high hardness, high strength, wear resistance and corrosion resistance. It is very suitable as the outer layer of the bushing and can withstand mechanical stress and chemical corrosion in harsh working environments, ensuring the long-term stable operation of the bushing.

[0045] The inner bushing 2 is made of engineering plastics. Engineering plastics have excellent wear resistance, self-lubrication, corrosion resistance and lightweight properties, making them very suitable for direct contact with the drive shaft. By selecting appropriate engineering plastics, such as polyamide and polytetrafluoroethylene, the performance of the bushing can be further optimized, friction and energy consumption can be reduced, and the operating efficiency of the equipment can be improved.

[0046] The buffer section 3 is made of rubber or resin, which has good elasticity and wear resistance. It can absorb and disperse the impact and vibration generated by the drive shaft during operation, providing effective cushioning and shock absorption. At the same time, it can also adapt to the small displacement of the drive shaft, ensuring a tight fit between the bushing and the drive shaft.

[0047] Furthermore, the axial depth of the buffer groove 23 is greater than 3 mm. This ensures that the buffer part 3 has sufficient embedding depth and support area, thereby more effectively absorbing and dispersing the impact force and vibration generated by the drive shaft during operation.

[0048] In this embodiment, as Figure 6 As shown, an annular step 11 is formed between the outer circumferential surface of the outer bushing 1 and the outer circumferential surface of the inner bushing 2. The step 11 is mainly used to enhance the structural strength of the outer bushing 1, making it more stable when subjected to working pressure and mechanical stress, and at the same time to facilitate the installation and fixing of the bushing, such as fixing the bushing to the pump body by fasteners such as bolts and snap rings.

[0049] Furthermore, the rounded corners on one end face of the inner bushing 2 help improve the overall performance and ease of installation of the bushing.

[0050] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to replace them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

Claims

1. A shaft bushing for a pump, comprising an outer bushing (1) and an inner bushing (2) which is inserted into the outer bushing (1), the inner bushing (2) being provided with a shaft hole (22) for accommodating and providing support and protection for a drive shaft, characterized in that, The inner sleeve (2) is provided with a plurality of buffer grooves (23) on the inner wall of the inner sleeve (2), the buffer grooves (23) are in engagement with the shaft hole (22), and the buffer grooves (23) are inlaid with buffer portions (3) capable of interference fit with the transmission shaft.

2. A shaft bushing for a pump according to claim 1, characterized in that The outer sleeve (1) is in the shape of a hollow cylinder, the inner sleeve (2) is provided with an annular groove (21) in the shape of a ring, and the inner sleeve (2) is inlaid in the inner cavity of the outer sleeve (1) through the annular groove (21).

3. A shaft bushing for a pump according to claim 1 or 2, characterized in that The shaft hole (22) is circumferentially provided with a plurality of uniformly arranged key grooves (22a), and the buffer grooves (23) are in engagement with the key grooves (22a).

4. A shaft bushing for a pump according to claim 3, wherein The buffer grooves (23) are discontinuously and intermittently arranged.

5. A shaft bushing for a pump according to claim 4, wherein The buffer portion (3) is in the shape of a U and closely adheres to the outer circumferential surface of the buffer groove (23).

6. A shaft bushing for a pump according to claim 5, wherein The buffer grooves (23) are located at the end of the inner sleeve (2) and in engagement with the end surface of the inner sleeve (2).

7. A shaft bushing for a pump according to any one of claims 4-6, characterized in that The material of the outer sleeve (1) is tungsten steel, the material of the inner sleeve (2) is engineering plastic, and the buffer portion (3) is in a flexible material, specifically rubber or resin.

8. A shaft bushing for a pump according to any one of claims 4-6, characterized in that The axial depth of the buffer groove (23) is greater than 3 mm.

9. A shaft bushing for a pump according to any one of claims 4-6, characterized in that An annular step (11) is formed between the outer circumferential surface of the outer sleeve (1) and the outer circumferential surface of the inner sleeve (2).

10. A shaft bushing for a pump according to any one of claims 4-6, characterized in that The edge of one end surface of the inner sleeve (2) is provided with a round corner.

Images