Water pump shaft with multiple sealing structures

Abstract

The utility model discloses a water pump shaft with a multi-sealing structure, which belongs to the technical field of water pump shaft sealing and is characterized in that a first multi-sealing component and a second multi-sealing component are arranged on a rod body of a shaft rod, and the first multi-sealing component and the second multi-sealing component are identical in structure. Multiple sealing operation of the shaft rod is achieved through the first multiple sealing assembly and the second multiple sealing assembly. The first multi-sealing assembly comprises a shaft body, a sealing ring, an outer cover and an inner supporting seat, the shaft body is located on a rod body of the shaft rod, a filler bin is formed in the shaft body, the inner supporting seat is arranged in the middle of the filler bin, and the outer cover matched with the shaft body is arranged at the outer end of the inner supporting seat. The multiple sealing assemblies cooperate to enhance sealing protection of the shaft rod, and liquid leakage is effectively prevented. In a severe environment, the reliability of the water pump shaft is ensured, and sealing failure faults are prevented. The sealing filler uniformly applies pressure through the spring and the ring, the sealing effect is ensured, and local abrasion is avoided. And the integrated and wedge-shaped design of the inner supporting seat and the limiting strip improves the structural stability.

Description

Technical Field

[0001] This utility model relates to the field of water pump shaft sealing technology, and in particular to a water pump shaft with a multi-seal structure. Background Technology

[0002] The pump shaft is one of the core components of a water pump, primarily used to fix the impeller and drive its rotation to achieve the pumping function. The main function of the pump shaft is to transmit the torque input from the engine to the impeller, providing the energy required for the impeller to perform its work. Simultaneously, it supports the impeller to maintain stability during high-speed rotation. During pump operation, the pump shaft simultaneously withstands bending moment and torque, making it a critical component for the normal operation of the water pump.

[0003] In practical applications of water pump shafts, it is indeed common to use a sealing ring fitted onto the shaft to achieve a sealing effect. The original design purpose of this sealing ring was to prevent liquid leakage and ensure the normal operation of the water pump. However, prolonged use often leads to wear of the sealing ring, thereby affecting its sealing performance.

[0004] Once the sealing ring wears down, its sealing performance will decrease significantly, and a single sealing ring often cannot achieve a good seal. This not only leads to a reduction in water pump efficiency but may also cause safety hazards such as leaks. Therefore, to ensure the normal operation of the water pump and extend its service life, it is necessary to inspect and replace the sealing rings regularly. Utility Model Content

[0005] The main objective of this invention is to provide a water pump shaft with a multi-seal structure, which can effectively solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0007] A water pump shaft with a multiple sealing structure includes a shaft and a bearing assembly, wherein the bearing assembly is sleeved on the shaft;

[0008] The shaft is provided with a first multi-seal assembly and a second multi-seal assembly. The first multi-seal assembly and the second multi-seal assembly have the same structure, and the first multi-seal assembly and the second multi-seal assembly realize the multi-seal operation of the shaft.

[0009] The first multi-seal assembly includes a shaft, a sealing ring, an outer cover, and an inner support seat. The shaft is located on the shaft body, and a filling chamber is formed inside the shaft. An inner support seat is provided in the middle of the filling chamber. An outer cover that is adapted to the shaft is provided at the outer end of the inner support seat. A first sealing ring and a second sealing ring are fitted at the two openings formed by the outer cover and the shaft. The first sealing ring and the second sealing ring are a multi-seal design.

[0010] The end face of the inner support seat has multiple through holes, and a clamping spring is inserted into each through hole. The edge of the end face of the inner support seat is provided with a limiting strip. A clamping ring is provided between the limiting strip, the inner support seat and the shaft. The clamping ring is connected to the clamping spring and is used to isolate the packing chamber. The inside of the packing chamber is filled with sealing packing. The clamping ring drives the sealing packing through the clamping spring, thereby pressing the first sealing ring and the second sealing ring tightly.

[0011] The shaft and the rod are designed as a single unit, and the outer diameter of the shaft is the same as that of the outer cover. The side walls of the outer cover and the inner support seat are provided with aligned screw holes, and bolts are inserted into the outer cover and the inner support seat to achieve fixation.

[0012] The outer cover, shaft body, first sealing ring and second sealing ring are bonded together with adhesive. The cross-section of the first sealing ring and the second sealing ring is "L" shaped and is embedded in the filling chamber and adapted to the limiting strip.

[0013] The inner support base and the limiting strip are designed as a single unit, and the upper end of the limiting strip is wedge-shaped. The limiting strip prevents the clamping ring from falling off. The inner support base and the shaft are fixed with bolts.

[0014] The clamping spring is fixed to two clamping rings by bolts, and multiple clamping springs are distributed in a ring on the inner support seat. The outer end face of the clamping ring is connected to an anti-corrosion rubber gasket by adhesive.

[0015] The sealing filler includes any one of polytetrafluoroethylene, synthetic fiber, or a mixture of synthetic fiber and polytetrafluoroethylene.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] The combined operation of two multi-seal assemblies enhances the multiple sealing protection of the shaft, effectively preventing liquid leakage. In harsh operating environments, the multi-seal assemblies ensure the reliability of the pump shaft and prevent malfunctions caused by seal failure.

[0018] The sealing packing applies pressure evenly through the clamping spring and clamping ring to ensure a good seal and prevent localized wear of the sealing ring. The integrated design of the inner support base and the limiting strip, along with the wedge-shaped design, increases the structural stability.

[0019] The integrated design and aligned screw holes simplify the assembly process while ensuring a tight connection between components. Adhesive is used to connect the housing, shaft, and seal, enhancing the bond strength between the seal and the shaft. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0021] Figure 2 This is a diagram illustrating the multi-sealing assembly of this utility model;

[0022] Figure 3 This is a cross-sectional view of the multi-sealing component of this utility model;

[0023] Figure 4 This is a diagram illustrating the inner support frame, the clamping spring, and the clamping ring of this utility model.

[0024] Figure 5 This is a cross-sectional view of the multi-sealing component of this utility model.

[0025] In the diagram: 1. Shaft; 2. Bearing assembly; 3. First multiple sealing assembly; 31. Shaft body; 32. First sealing ring; 33. Second sealing ring; 34. Packing chamber; 35. Outer cover; 36. Inner support seat; 37. Clamping spring; 38. Limiting strip; 39. Clamping ring; 4. Second multiple sealing assembly; 5. Sealing packing. Detailed Implementation

[0026] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0027] like Figure 1 - Figure 5 As shown, a water pump shaft with a multi-seal structure includes a shaft 1 and a bearing assembly 2, wherein the bearing assembly 2 is mounted on the shaft 1. This design enables the water pump shaft to obtain more stable support during operation, thereby improving the overall performance and service life of the water pump.

[0028] On the shaft 1, a first multi-seal assembly 3 and a second multi-seal assembly 4 are designed, and the structures of these two multi-seal assemblies are exactly the same. Through the coordinated work of these two multi-seal assemblies, multiple sealing protections can be achieved for the shaft 1; this design not only enhances the sealing effect, but also improves the reliability of the pump shaft in harsh working environments.

[0029] The first multi-seal assembly 3 consists of a shaft 31, sealing rings, an outer cover 35, and an inner support 36. The shaft 31 is fixed to the shaft 1, forming a stuffing box 34 inside. The inner support 36 is located in the middle of the stuffing box 34, and the outer cover 35, which is adapted to the shaft 31, is installed at the outer end of the inner support 36. Two openings are formed between the outer cover 35 and the shaft 31, and a first sealing ring 32 and a second sealing ring 33 are respectively fitted into these two openings. Both sealing rings are multi-seal designs; this structural design ensures that the sealing rings can effectively prevent liquid leakage during operation.

[0030] The inner support 36 has multiple through holes on its end face, each into which a clamping spring 37 is inserted. A limiting strip 38 is provided at the edge of the end face of the inner support 36, and a clamping ring 39 is provided between the limiting strip 38, the inner support 36, and the shaft 31. The clamping ring 39 is connected to the clamping spring 37, and its function is to isolate the stuffing box 34. The stuffing box 34 is filled with sealing packing 5. The clamping ring 39, through the action of the clamping spring 37, drives the sealing packing 5, thereby applying pressure to the first sealing ring 32 and the second sealing ring 33 to ensure their sealing effect. This design allows the sealing packing 5 to be pressurized evenly, thus improving the sealing effect.

[0031] The shaft 31 and the shaft rod 1 are designed as a single unit, and the outer diameter of the shaft 31 is consistent with the outer diameter of the outer cover 35. Aligned screw holes are provided on the side walls of the outer cover 35 and the inner support 36, and the outer cover 35 and the inner support 36 are fixed together by bolts; this design simplifies the assembly process while ensuring a tight connection between the components.

[0032] The outer cover 35, the shaft 31, and the first sealing ring 32 and the second sealing ring 33 are bonded together with adhesive. The cross-section of the first sealing ring 32 and the second sealing ring 33 is designed to be "L" shaped and can be embedded in the stuffing box 34 and matched with the limiting strip 38; this design not only enhances the bonding strength between the sealing ring and the shaft 31, but also improves the sealing performance.

[0033] The inner support base 36 and the limiting strip 38 are designed as a single unit. The upper end of the limiting strip 38 is wedge-shaped to prevent the retaining ring 39 from falling off. The inner support base 36 and the shaft 31 are fixed together with bolts. This design ensures a stable connection between the inner support base 36 and the shaft 31, while the wedge-shaped design increases the structural stability.

[0034] The clamping springs 37 are fixed to the two clamping rings 39 by bolts, and multiple clamping springs 37 are distributed in a ring on the inner support seat 36. The outer end face of the clamping rings 39 is connected to the anti-corrosion rubber gasket by adhesive; this design allows the springs to apply pressure evenly, while the anti-corrosion rubber gasket protects the clamping rings 39 from corrosion.

[0035] The sealing packing 5 can be made of any one of polytetrafluoroethylene (PTFE), synthetic fibers, or a mixture of synthetic fibers and PTFE to adapt to different working environments and requirements. This diverse material selection allows the pump shaft to adapt to various working conditions, thereby ensuring the stable operation of the pump.

[0036] Prepare shaft 1 and bearing assembly 2. Prepare a first multi-seal assembly 3 and a second multi-seal assembly 4, each assembly including shaft 31, sealing rings, outer cover 35, inner support seat 36, clamping spring 37, limiting strip 38, clamping ring 39, and sealing filler 5. Install bearing assembly 2 on shaft 1, ensuring stable support. Fix shaft 31 to the shaft body of shaft 1. Form a filling chamber 34 inside shaft 31, and set inner support seat 36 in the middle. Install outer cover 35, which is adapted to shaft 31, on the outer end of inner support seat 36. Form two openings between outer cover 35 and shaft 31, and respectively fit the first sealing ring 32 and the second sealing ring 33. Ensure that the sealing rings are multi-seal designed to enhance the sealing effect. Open multiple through holes on the end face of inner support seat 36 and insert clamping spring 37. Set limiting strip 38 on the edge of end face of inner support seat 36. Ensure that a retaining ring 39 is provided between the limit strip 38, the inner support seat 36, and the shaft 31. Aligned screw holes are made on the side walls of the outer cover 35 and the inner support seat 36. Secure the outer cover 35 and the inner support seat 36 together with bolts, ensuring a tight connection between the components. Use adhesive to connect the outer cover 35, the shaft 31, and the first sealing ring 32 and the second sealing ring 33. Secure the retaining spring 37 to the two retaining rings 39 with bolts. Ensure that multiple retaining springs 37 are distributed in a ring on the inner support seat 36. Connect anti-corrosion rubber gaskets to the outer end faces of the retaining rings 39 using adhesive. Fill the stuffing box 34 with sealing packing 5. The action of the retaining rings 39 and the retaining springs 37 drives the sealing packing 5, applying pressure to the first sealing ring 32 and the second sealing ring 33 to ensure a sealing effect. Check that all components are correctly installed and secured. Ensure that all sealing parts are leak-free, ensuring the stability and reliability of the pump shaft.

[0037] Install the assembled pump shaft into the pump, ensuring proper connection with other pump components. Start the pump and check for smooth operation of the pump shaft. Monitor the pump's operation to ensure there is no abnormal noise or vibration. Regularly check the sealing effectiveness of the multiple sealing components to ensure no liquid leakage. If leakage is detected, promptly inspect and replace the sealing rings or sealing packing 5. Regularly maintain and service the pump shaft, including cleaning and lubricating the bearing assembly 2. Check that all bolts and connections are tight to ensure stable operation of the pump shaft. In harsh working environments, pay special attention to checking the performance of the sealing components to ensure they can adapt to different working conditions. Replace the sealing packing 5 material as needed to adapt to different working environments and requirements.

[0038] It should be noted that, in this document, relational terms such as first and second (number one, number two), etc., are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes the element.

[0039] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A water pump shaft with a multiple sealing structure, comprising a shaft (1) and a bearing assembly (2), wherein the bearing assembly (2) is sleeved on the shaft (1), characterized in that: The shaft (1) is provided with a first multi-seal assembly (3) and a second multi-seal assembly (4). The first multi-seal assembly (3) and the second multi-seal assembly (4) have the same structure. The first multi-seal assembly (3) and the second multi-seal assembly (4) are used to realize the multi-seal operation of the shaft (1). The first multi-seal assembly (3) includes a shaft (31), a sealing ring, an outer cover (35), and an inner support seat (36). The shaft (31) is located on the shaft (1). A filling chamber (34) is formed inside the shaft (31), and an inner support seat (36) is provided in the middle of the filling chamber (34). An outer cover (35) adapted to the shaft (31) is provided at the outer end of the inner support seat (36). A first sealing ring (32) and a second sealing ring (33) are fitted at the two openings formed by the outer cover (35) and the shaft (31). The first sealing ring (32) and the second sealing ring (33) are multi-seal designs. The inner support base (36) has multiple through holes on its end face, and a clamping spring (37) is inserted into each through hole. The end face edge of the inner support base (36) is provided with a limiting strip (38). A clamping ring (39) is provided between the limiting strip (38), the inner support base (36) and the shaft (31). The clamping ring (39) is connected to the clamping spring (37). The clamping ring (39) is isolated from the filling chamber (34). The filling chamber (34) is filled with sealing packing (5). The clamping ring (39) drives the sealing packing (5) through the clamping spring (37), thereby pressing the first sealing ring (32) and the second sealing ring (33).

2. A water pump shaft with a multiple sealing structure according to claim 1, characterized in that: The shaft (31) and the shaft rod (1) are designed as a single unit. The outer diameter of the shaft (31) and the outer cover (35) are the same. The side walls of the outer cover (35) and the inner support (36) are provided with aligned screw holes. Bolts are inserted into the outer cover (35) and the inner support (36) to achieve fixation.

3. A water pump shaft with a multiple sealing structure according to claim 2, characterized in that: The outer cover (35), shaft (31) are bonded to the first sealing ring (32) and the second sealing ring (33) by adhesive. The cross-section of the first sealing ring (32) and the second sealing ring (33) is designed in an "L" shape and is embedded in the filling chamber (34) and the limiting strip (38) for adaptation.

4. A water pump shaft with a multiple sealing structure according to claim 3, characterized in that: The inner support base (36) and the limiting strip (38) are designed as a single unit, and the upper end of the limiting strip (38) is wedge-shaped. The limiting strip (38) prevents the clamping ring (39) from falling off. The inner support base (36) and the shaft (31) are fixed by bolts.

5. A water pump shaft with a multiple sealing structure according to claim 4, characterized in that: The clamping spring (37) is fixed to the two clamping rings (39) by bolts. Multiple clamping springs (37) are distributed in a ring on the inner support seat (36). The outer end face of the clamping ring (39) is connected to the anti-corrosion rubber gasket by adhesive.

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