Modularized sealing assembly of magnetic drive pump

Abstract

The utility model discloses a magnetic drive pump modularized sealing assembly, which belongs to the technical field of magnetic drive pumps, and comprises a static sealing module and a dynamic sealing module, the static sealing module comprises a static ring seat and a static sealing ring, the static ring seat is sleeved on the outer side of a shaft sleeve of a magnetic drive pump and is fixedly connected with a pump body, an annular clamping groove is arranged on the inner side of the static ring seat, and the static sealing ring is arranged in the annular clamping groove. The static sealing ring is arranged in the annular clamping groove in an interference fit mode. The movable sealing module comprises a movable sealing ring, an elastic piece and a sealing sleeve, the movable sealing ring is arranged on the outer side of a shaft sleeve of the magnetic drive pump in a sleeving mode, the end face of the movable sealing ring is attached to the end face of the static sealing ring to form a friction pair, an annular boss is machined on the outer side of the shaft sleeve, the elastic piece is connected with the movable sealing ring and the annular boss, and the sealing sleeve is arranged on the outer side of the elastic piece. The sealing ring is connected with the annular boss. Modular design is adopted, the difficulty of replacement and maintenance is reduced, the cost is reduced, the elastic piece provides dynamic compensation, the sealing effect is improved, and the leakage risk is reduced.

Description

Technical Field

[0001] This utility model relates to the field of magnetic pump technology, specifically to a modular sealing assembly for a magnetic pump. Background Technology

[0002] Magnetic drive pumps, as leak-free fluid transport devices, are widely used in fields with extremely high sealing requirements, such as chemical, pharmaceutical, and nuclear power industries. Traditional magnetic drive pump sealing components are mostly one-piece sealing structures with multi-stage sealing rings. This method ensures sealing performance but increases the difficulty of disassembly and assembly, requiring the removal of the entire pump shaft to replace the sealing component. Moreover, replacing the entire component increases costs. On the other hand, multi-layer sealing designs are generally rigidly connected by bolts, lacking dynamic compensation capabilities. The sealing method relies on the tight fit of each component, and pump shaft vibration can easily lead to leakage. Utility Model Content

[0003] The purpose of this utility model is to provide a modular sealing assembly for a magnetic pump to solve the above problems, ensure sealing effect, facilitate quick and easy maintenance, enable partial replacement, and reduce costs.

[0004] Technical Solution: This utility model provides a modular sealing assembly for a magnetic pump, including: a static sealing module and a dynamic sealing module. The static sealing module includes a static ring seat and a static sealing ring. The static ring seat is fitted onto the outside of the shaft sleeve of the magnetic pump and is fixedly connected to the pump body. An annular groove is provided on the inner side of the static ring seat, and the static sealing ring is interference-fitted into the annular groove. The dynamic sealing module includes a dynamic sealing ring, an elastic element, and a sealing sleeve. The dynamic sealing ring is fitted onto the outside of the shaft sleeve of the magnetic pump, and the end faces of the dynamic sealing ring and the static sealing ring are in contact to form a friction pair. An annular boss is machined on the outside of the shaft sleeve. One end of the elastic element is connected to the dynamic sealing ring, and the other end is connected to the annular boss. The sealing sleeve is disposed on the outside of the elastic element, and both sides of the sealing sleeve are connected to the sealing ring and the annular boss, and a sleeve rubber ring is provided for sealing.

[0005] Furthermore, in the aforementioned modular sealing assembly for a magnetic pump, the roughness of the contact surface between the static sealing ring and the dynamic sealing ring is less than Ra0.4.

[0006] Furthermore, in the aforementioned modular sealing assembly for a magnetic pump, the static sealing ring and the dynamic sealing ring are made of silicon carbide, hard alloy, or ceramic materials.

[0007] Furthermore, in the aforementioned modular sealing assembly for a magnetic pump, a pressure cap is provided on the outer side of the stationary ring seat, and a sealing gasket is provided between the pressure cap and the magnetic pump body.

[0008] Furthermore, in the aforementioned modular sealing assembly for a magnetic pump, the static sealing ring is provided with an anti-rotation pin to fix it to the static ring seat, preventing the static sealing ring from rotating circumferentially.

[0009] Furthermore, in the aforementioned modular sealing assembly for a magnetic pump, the elastic element is a bellows or a spring.

[0010] Furthermore, in the aforementioned modular sealing assembly for a magnetic pump, the end faces of the static sealing ring and the dynamic sealing ring are provided with micron-sized spiral grooves for the inflowing medium to form a lubricating film.

[0011] Furthermore, in the aforementioned modular sealing assembly for a magnetic pump, a keyway is provided on the outer side of the bushing, and a retaining key is provided on the inner side of the dynamic sealing ring. The keyway and the retaining key cooperate to ensure that the bushing and the dynamic sealing ring rotate synchronously.

[0012] As can be seen from the above technical solution, the present invention has the following beneficial effects: The modular sealing assembly for a magnetic pump described in this invention uses a modular design. It achieves end-face sealing by forming a friction pair through the contact surfaces of the dynamic sealing ring and the static sealing ring. It provides contact pressure through an elastic element to improve the sealing effect. The dynamic sealing module is placed outside the shaft sleeve, and absorbs pump shaft vibration through the elastic element to provide dynamic compensation. The overall design allows for direct replacement of the dynamic sealing module or the static sealing module without removing the pump shaft, reducing the difficulty of replacement and maintenance and lowering costs. Attached Figure Description

[0013] Figure 1 This is a cross-sectional schematic diagram of a modular sealing assembly for a magnetic pump according to the present invention;

[0014] Figure 2 This is a schematic diagram of the cross-section of the contact surface between the dynamic sealing ring and the static sealing ring of this utility model;

[0015] Figure 3 This is a schematic diagram of the cross-section connecting the bushing and the dynamic sealing ring of this utility model.

[0016] In the figure: static sealing module 1, dynamic sealing module 2, static ring seat 11, static sealing ring 12, bushing 101, annular boss 102, gland 103, sealing gasket 104, annular groove 111, dynamic sealing ring 21, elastic element 22, sealing sleeve 23, sleeve rubber ring 231, keyway 1011, retaining key 211, micron spiral groove 121. Detailed Implementation

[0017] Example 1

[0018] like Figure 1The illustrated modular sealing assembly for a magnetic pump includes: a static sealing module 1 and a dynamic sealing module 2. The static sealing module 1 includes a static ring seat 11 and a static sealing ring 12. The static ring seat 11 is fitted onto the outside of the shaft sleeve 101 of the magnetic pump and is fixedly connected to the pump body. An annular groove 111 is provided on the inner side of the static ring seat 11, and the static sealing ring 12 is provided with an interference fit in the annular groove 111. The dynamic sealing module 2 includes a dynamic sealing ring 21, an elastic element 22, and a sealing sleeve 23. The dynamic sealing ring 21 is fitted onto the outside of the shaft sleeve 101 of the magnetic pump, and the end faces of the dynamic sealing ring 21 and the static sealing ring 12 are in contact to form a friction pair. An annular boss 102 is machined on the outside of the shaft sleeve 101. One end of the elastic element 22 is connected to the dynamic sealing ring 21, and the other end is connected to the annular boss 102. The sealing sleeve 23 is disposed on the outside of the elastic element 22, and both sides of the sealing sleeve 23 are connected to the sealing ring 21 and the annular boss 102, and a sleeve rubber ring 231 is provided for sealing. The end face sealing function is achieved by forming a friction pair through the contact surface of the dynamic sealing ring 21 and the static sealing ring 12. The modular design allows the dynamic sealing module 2 or the static sealing module 1 to be directly replaced without removing the pump shaft, reducing the difficulty of replacement and maintenance and lowering costs.

[0019] In this embodiment, the roughness of the contact end face between the static sealing ring 12 and the dynamic sealing ring 21 is less than Ra0.4.

[0020] In this embodiment, a pressure cover 103 is provided on the outer side of the stationary ring seat 11, a sealing gasket 104 is provided between the pressure cover 103 and the magnetic pump body, and an O-ring is provided between the pressure cover 103 and the stationary ring seat 11; the stationary sealing ring 12 is provided with an anti-rotation pin to fix it to the stationary ring seat 11 to prevent the stationary sealing ring 12 from rotating circumferentially.

[0021] In this embodiment, the elastic element 22 is a bellows or a spring, and the initial clamping force is set to 50-80N. The elastic element 22 absorbs pump shaft vibration, provides dynamic compensation, and reduces the risk of leakage.

[0022] In this embodiment, the bushing 101 is provided with a leakage monitoring unit at the connection end with the magnetic pump shaft to detect leakage in real time.

[0023] Example 2

[0024] Based on Example 1, in this example, as... Figure 2 The diagram shows a modular sealing assembly for a magnetic pump. The static sealing ring 12 and the dynamic sealing ring 21 have micron-sized spiral grooves 121 on their end faces for the inflowing medium to form a lubricating film. The depth of the micron-sized spiral grooves 121 is controlled at 1-3 μm, and the groove area accounts for 10%-20%. The spiral angle of the micron-sized spiral grooves 121 is consistent with the direction of pump shaft rotation, leaving sufficient sealing contact surface to ensure the stability of the liquid film and guarantee the sealing effect.

[0025] In this embodiment, the static sealing ring 12 and the dynamic sealing ring 21 are made of silicon carbide, hard alloy or ceramic material, and the outer side of the dynamic sealing ring 21 is coated with tungsten carbide coating.

[0026] In this embodiment, a dustproof ring is provided on the outer side of the dynamic sealing ring 21 to prevent impurities from entering the contact surface between the dynamic sealing ring 21 and the static sealing ring 12, thus preventing them from affecting the friction pair.

[0027] In this embodiment, a coolant channel is provided on the outside of the dynamic sealing ring 21. The coolant channel is a spiral copper tube that is sleeved on the outside of the dynamic sealing ring.

[0028] like Figure 3 The diagram shows a modular sealing assembly for a magnetic pump. The outer side of the bushing 101 is provided with a keyway 1011, and the inner side of the dynamic sealing ring 21 is provided with a retaining key 211. The keyway 1011 and the retaining key 211 cooperate to ensure that the bushing 101 and the dynamic sealing ring 21 rotate synchronously.

[0029] It should be noted that the above description is merely a technical solution of the utility model and not a limitation. Although the present utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of the utility model without departing from the scope of the present utility model, and all such modifications and substitutions should be covered within the scope of the claims of the present utility model.

Claims

1. A modular sealing assembly for a magnetic pump, characterized in that: include: A static sealing module (1) includes a static ring seat (11) and a static sealing ring (12). The static ring seat (11) is fitted on the outside of the shaft sleeve (101) of the magnetic pump and is fixedly connected to the pump body. An annular groove (111) is provided on the inner side of the static ring seat (11). The static sealing ring (12) is set in the annular groove (111) by interference fit. The dynamic sealing module (2) includes a dynamic sealing ring (21), an elastic element (22), and a sealing sleeve (23). The dynamic sealing ring (21) is sleeved on the outside of the shaft sleeve (101) of the magnetic pump. The dynamic sealing ring (21) and the end face of the static sealing ring (12) are fitted together to form a friction pair. An annular boss (102) is machined on the outside of the shaft sleeve (101). One end of the elastic element (22) is connected to the dynamic sealing ring (21), and the other end is connected to the annular boss (102). The sealing sleeve (23) is set on the outside of the elastic element (22). The two sides of the sealing sleeve (23) are connected to the sealing ring (21) and the annular boss (102), and a sleeve rubber ring (231) is provided for sealing.

2. The modular sealing assembly for a magnetic pump according to claim 1, characterized in that: The surface roughness of the contact end face between the static sealing ring (12) and the dynamic sealing ring (21) is less than Ra0.

4.

3. A modular sealing assembly for a magnetic pump according to claim 1, characterized in that: The static sealing ring (12) and the dynamic sealing ring (21) are made of silicon carbide, hard alloy or ceramic materials.

4. A modular sealing assembly for a magnetic pump according to claim 1, characterized in that: The outer side of the stationary ring seat (11) is provided with a pressure cover (103), and a sealing gasket (104) is provided between the pressure cover (103) and the magnetic pump body.

5. A modular sealing assembly for a magnetic pump according to claim 1, characterized in that: The static sealing ring (12) is provided with an anti-rotation pin to fix it to the static ring seat (11) to prevent the static sealing ring (12) from rotating circumferentially.

6. A modular sealing assembly for a magnetic pump according to claim 1, characterized in that: The elastic element (22) is a bellows or a spring.

7. A modular sealing assembly for a magnetic pump according to claim 1, characterized in that: The static sealing ring (12) and the dynamic sealing ring (21) have micron-sized spiral grooves (121) on their end faces for the inflowing medium to form a lubricating film.

8. A modular sealing assembly for a magnetic pump according to claim 1, characterized in that: The bushing (101) has a keyway (1011) on the outside and a retaining key (211) on the inside of the dynamic sealing ring (21). The keyway (1011) and the retaining key (211) cooperate to ensure that the bushing (101) and the dynamic sealing ring (21) rotate synchronously.

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