High-power corrosion-resistant leakage-free magnetic transmission centrifugal pump

Abstract

The utility model provides a high-power corrosion-resistant leakage-free magnetic transmission centrifugal pump, and relates to the technical field of magnetic transmission centrifugal pumps, the high-power corrosion-resistant leakage-free magnetic transmission centrifugal pump comprises a pump body and a suspension, the rear side of the pump body is provided with a middle body, the rear side of the middle body is provided with an isolation sleeve, the rear side of the isolation sleeve is provided with the suspension, and the rear end of the suspension is provided with a double-diaphragm coupling. The double-diaphragm coupling is covered with a protective cover, the rear end of the protective cover is installed at the front end of the motor, a suspension support is arranged on the lower portion of the suspension and fixed to the bottom plate, an impeller is arranged in the pump body and installed on the front portion of a pump shaft, and the middle of the pump shaft is sleeved with a sliding bearing. The pump shaft, the bearing and the thrust bearing are made of high-purity pressureless sintered silicon carbide, a shaft sleeve part is omitted, a shaft diameter increasing simplified structure is adopted, the high-purity pressureless sintered silicon carbide pump shaft can transmit larger magnetic torque, and the ultrapure electronic chemical delivery pump can generate larger flow and lift.

Description

Technical Field

[0001] This utility model relates to the field of magnetic drive centrifugal pump technology, specifically to a high-power, corrosion-resistant, leak-free magnetic drive centrifugal pump. Background Technology

[0002] The magnetic drive pump structure consists of a pump body, impeller, pump cover, outer magnetic rotor and transmission components, inner magnetic rotor, thrust ring, isolation sleeve, pump shaft, shaft sleeve, bearings, and motor. The inner and outer magnetic rotors are separated by a non-magnetic isolation sleeve, which is secured to the pump cover with a gasket. The inner magnetic rotor, connected to the impeller, is driven by the outer magnetic rotor, connected to the motor, through the action of a magnetic field, thus enabling the pump to transport media in a completely sealed and leak-free manner. Due to its leak-free characteristics, magnetic drive pumps are widely used in petrochemical and other fields for transporting high-temperature, flammable, explosive, highly toxic, valuable, and corrosive media.

[0003] The specification of a magnetically driven leak-free centrifugal pump in the prior art (announcement number CN204386895U) mentions that "the pump body is provided with a pump shaft, the head of the pump shaft is provided with an impeller, the pump shaft and the pump body are positioned by a bearing seat, the pump shaft and the bearing seat are positioned by a pair of bearings spaced apart, a bushing is provided between the bearing and the pump shaft, a metal bushing is provided between the bushing and the pump shaft, and the bearing is positioned with the bearing seat by a thrust ring." However, the leak-free centrifugal pump in the prior art may generate wear particles during operation, and the accumulation of liquid after long-term pump shutdown will cause contamination of the medium when the pump is restarted. This is not conducive to the transmission of greater magnetic torque by the high-purity pressureless sintered silicon carbide pump shaft, resulting in a small and slow flow rate for ultrapure electronic chemical transfer pumps, which is not efficient and practical. Utility Model Content

[0004] To overcome the shortcomings of existing technologies, a high-power, corrosion-resistant, leak-free magnetic drive centrifugal pump is provided. This addresses the problem that existing leak-free centrifugal pumps may generate wear particles during operation, which is detrimental to the transmission of greater magnetic torque by the high-purity, pressureless sintered silicon carbide pump shaft, resulting in small and slow flow rates in ultrapure electronic chemical transfer pumps, making them inefficient and impractical.

[0005] To achieve the above objectives, a high-power, corrosion-resistant, leak-free magnetically driven centrifugal pump is provided, comprising a pump body and a suspension. A middle body is provided at the rear of the pump body, and an isolation sleeve is provided at the rear of the middle body. The suspension is provided at the rear of the isolation sleeve, and a double diaphragm coupling is provided at the rear end of the suspension. The double diaphragm coupling is covered by a protective cover, and the rear end of the protective cover is installed at the front end of the motor. A suspension bracket is provided at the lower part of the suspension, and the suspension bracket is fixed to the base plate.

[0006] Furthermore, an impeller is provided in the pump body and is installed at the front of the pump shaft. A sliding bearing is fitted in the middle of the pump shaft, and a pump body sealing gasket is provided at the connection between the front end of the isolation sleeve and the rear end of the pump body.

[0007] Furthermore, the rear part of the pump shaft is fitted with an isolation sleeve sealing gasket, and an inner magnetic rotor is fitted over the isolation sleeve sealing gasket, with the inner magnetic rotor located inside the isolation sleeve.

[0008] Furthermore, an outer support is provided on the outer side of the inner magnetic rotor, and an outer magnetic rotor is provided on the outer side of the outer support. The rear part of the outer magnetic rotor is sleeved on the front part of the transmission shaft, and the front end of the transmission shaft is fixed together with the rear end of the pump shaft.

[0009] Furthermore, the rear end of the drive shaft is fixed to the front end of the double diaphragm coupling, and the centers of the pump shaft, drive shaft, and double diaphragm coupling are all located on the same axis, and the pump shaft, drive shaft, and double diaphragm coupling are all rotatable structures.

[0010] Furthermore, a drain port cover is provided on the lower front side of the pump body, an inlet pipe is provided on the front side of the pump body, and an outlet pipe is provided on the upper side of the pump body.

[0011] Furthermore, a suspension bracket is fixed to the lower rear side of the suspension, and the lower ends of the suspension bracket and the protective cover are both fixed to the base plate, and the bottom of the motor sleeve fitted on the outside of the motor is fixed to the base plate.

[0012] The beneficial effects of this utility model are as follows:

[0013] 1. In this utility model, the pump body is made of steel shell and the inner lining of the flow-through components is made of ultra-pure PFA material to avoid contamination of the conveyed medium by precipitated ions.

[0014] 2. The double-support bearing structure in this utility model is beneficial to the long-term stable operation of the pump; moreover, the pump shaft, bearings and thrust bearings are made of high-purity pressureless sintered silicon carbide, which avoids the generation of wear particles during the operation of the pump.

[0015] 3. The pump of this utility model has a drain port at the lowest position to avoid the accumulation of liquid during long-term pump shutdown and the resulting contamination of the medium when the pump is restarted; moreover, the shaft sleeve component is eliminated and the structure is simplified by increasing the shaft diameter, which is conducive to the transmission of greater magnetic torque by the high-purity pressureless sintered silicon carbide pump shaft, so that the ultrapure electronic chemical transfer pump can generate greater flow and head, and meet the needs of more ultrapure electronic chemicals. Attached Figure Description

[0016] Figure 1 This is a front view schematic diagram of an embodiment of the present utility model;

[0017] Figure 2 This is a top view schematic diagram of an embodiment of the present utility model;

[0018] Figure 3 This is a cross-sectional schematic diagram of an embodiment of the present utility model;

[0019] Figure 4 This is a schematic diagram of the base plate of an embodiment of the present utility model.

[0020] In the diagram: 1. Pump body; 2. Impeller; 3. Pump body gasket; 4. Middle body; 5. Sliding bearing; 6. Pump shaft; 7. Isolation sleeve gasket; 8. Isolation sleeve; 9. Inner magnetic rotor; 10. Outer support; 11. Outer magnetic rotor; 12. Suspension; 13. Drive shaft; 14. Double diaphragm coupling; 15. Protective cover; 16. Motor; 17. Base plate; 18. Suspension bracket; 19. Drain port cover. Detailed Implementation

[0021] To make the technical problems, technical solutions, and beneficial effects of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. The specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model. Specific details such as particular system structures and technologies are provided to facilitate a more thorough understanding of the embodiments of this utility model. The described embodiments are some, but not all, of the embodiments disclosed herein. However, those skilled in the art should understand that the present utility model can also be implemented in other embodiments without these specific details. All other embodiments obtained by those skilled in the art based on the embodiments of this disclosure without inventive effort are within the scope of protection of this disclosure.

[0022] The specific embodiments of this utility model will now be described in detail with reference to the accompanying drawings.

[0023] Figure 1 This is a front view schematic diagram of an embodiment of the present utility model. Figure 2 This is a top view schematic diagram of an embodiment of the present utility model. Figure 3 This is a cross-sectional schematic diagram of an embodiment of the present utility model and Figure 4 This is a schematic diagram of the base plate of an embodiment of the present utility model.

[0024] Reference Figures 1 to 4 As shown, this utility model provides a high-power, corrosion-resistant, leak-free magnetic drive centrifugal pump, including a pump body 1 and a suspension 12. A middle body 4 is provided on the rear side of the pump body 1, and an isolation sleeve 8 is provided on the rear side of the middle body 4. The suspension 12 is provided on the rear side of the isolation sleeve 8, and a double diaphragm coupling 14 is provided at the rear end of the suspension 12. The double diaphragm coupling 14 is covered by a protective cover 15, and the rear end of the protective cover 15 is installed at the front end of the motor 16. A suspension bracket 18 is provided at the lower part of the suspension 12, and the suspension bracket 18 is fixed on the base plate 17.

[0025] In this embodiment, an impeller 2 is provided inside the pump body 1, and the impeller 2 is installed at the front of the pump shaft 6. A sliding bearing 5 is sleeved in the middle of the pump shaft 6, and a pump body sealing gasket 3 is provided at the connection between the front end of the isolation sleeve 8 and the rear end of the pump body 1.

[0026] As a preferred embodiment, the pump body 1 of this utility model is made of 304 steel shell, and the inner lining of the flow-through components is made of ultra-pure PFA material to avoid contamination of the conveyed medium by precipitated ions.

[0027] In this embodiment, an isolation sleeve sealing gasket 7 is fitted over the rear part of the pump shaft 6, and an inner magnetic rotor 9 is fitted over the isolation sleeve sealing gasket 7, with the inner magnetic rotor 9 located inside the isolation sleeve 8; an outer support 10 is provided on the outer side of the inner magnetic rotor 9, and an outer magnetic rotor 11 is provided on the outer side of the outer support 10, with the rear part of the outer magnetic rotor 11 fitted over the front part of the drive shaft 13, and the front end of the drive shaft 13 is fixed together with the rear end of the pump shaft 6; the rear end of the drive shaft 13 is fixed to the front end of the double diaphragm coupling 14, and the centers of the pump shaft 6, the drive shaft 13, and the double diaphragm coupling 14 are all located on the same axis, and the pump shaft 6, the drive shaft 13, and the double diaphragm coupling 14 are all rotatable structures.

[0028] As a preferred embodiment, the double-support bearing structure in this utility model is beneficial to the long-term stable operation of the pump; moreover, the pump shaft, bearings, and thrust bearings are made of high-purity pressureless sintered silicon carbide, which avoids the generation of wear particles during the operation of the pump.

[0029] In this embodiment, a drain cover 19 is provided on the lower front side of the pump body 1, and an inlet pipe is provided on the front side of the pump body 1, and an outlet pipe is provided on the upper side of the pump body 1; a suspension bracket 18 is fixed on the lower rear side of the suspension 12, and the lower ends of the suspension bracket 18 and the protective cover 15 are both fixed on the base plate 17, and the bottom of the motor sleeve fitted on the outside of the motor 16 is fixed on the base plate 17.

[0030] As a preferred embodiment, the pump of this invention has a drain port at its lowest position to avoid contamination of the medium during the next start-up due to liquid accumulation after long-term pump shutdown; moreover, the shaft sleeve component is eliminated and the structure is simplified by increasing the shaft diameter, which is conducive to the transmission of greater magnetic torque by the high-purity pressureless sintered silicon carbide pump shaft, so that the ultrapure electronic chemical transfer pump can generate greater flow rate and head, and meet the needs of more ultrapure electronic chemicals.

[0031] This invention effectively solves the problems in existing leak-free centrifugal pumps, such as the generation of wear particles during operation, and the accumulation of liquid during long-term pump shutdowns leading to media contamination upon restarting. These issues hinder the transmission of greater magnetic torque by the high-purity pressureless sintered silicon carbide pump shaft, resulting in low and slow flow rates and inefficiency in ultrapure electronic chemical transfer pumps. In this invention, the pump shaft, bearings, and thrust bearings are made of high-purity pressureless sintered silicon carbide. The shaft sleeve component is eliminated, and the structure is simplified by increasing the shaft diameter. This facilitates the transmission of greater magnetic torque by the high-purity pressureless sintered silicon carbide pump shaft, enabling the ultrapure electronic chemical transfer pump to generate greater flow rates and head.

[0032] The above embodiments are used to explain and illustrate the present utility model, and not to limit the utility model. Any modifications and changes made to the present utility model within the spirit and scope of the claims should be included within the protection scope of the present utility model.

Claims

1. A high-power, corrosion-resistant, leak-free magnetically driven centrifugal pump, characterized in that: The system includes a pump body (1) and a suspension (12). A middle body (4) is provided on the rear side of the pump body (1), and an isolation sleeve (8) is provided on the rear side of the middle body (4). The suspension (12) is provided on the rear side of the isolation sleeve (8), and a double diaphragm coupling (14) is provided at the rear end of the suspension (12). The double diaphragm coupling (14) is covered with a protective cover (15), and the rear end of the protective cover (15) is installed at the front end of the motor (16). A suspension bracket (18) is provided at the lower part of the suspension (12), and the suspension bracket (18) is fixed on the base plate (17).

2. The centrifugal pump with magnetic drive for high-power, corrosion-resistant, and leak-free operation according to claim 1, characterized in that, An impeller (2) is provided inside the pump body (1), and the impeller (2) is installed at the front of the pump shaft (6). A sliding bearing (5) is fitted in the middle of the pump shaft (6), and a pump body sealing gasket (3) is provided at the connection between the front end of the isolation sleeve (8) and the rear end of the pump body (1).

3. A high-power, corrosion-resistant, leak-free magnetically driven centrifugal pump according to claim 2, characterized in that, The rear part of the pump shaft (6) is fitted with an isolation sleeve gasket (7), and the isolation sleeve gasket (7) is fitted with an inner magnetic rotor (9), and the inner magnetic rotor (9) is located inside the isolation sleeve (8).

4. A high-power, corrosion-resistant, leak-free magnetically driven centrifugal pump according to claim 3, characterized in that, An outer support (10) is provided on the outside of the inner magnetic rotor (9), and an outer magnetic rotor (11) is provided on the outside of the outer support (10). The rear part of the outer magnetic rotor (11) is sleeved on the front part of the transmission shaft (13), and the front end of the transmission shaft (13) is fixed together with the rear end of the pump shaft (6).

5. A high-power, corrosion-resistant, leak-free magnetically driven centrifugal pump according to claim 4, characterized in that, The rear end of the drive shaft (13) is fixed to the front end of the double diaphragm coupling (14), and the centers of the pump shaft (6), drive shaft (13) and double diaphragm coupling (14) are all located on the same axis. The pump shaft (6), drive shaft (13) and double diaphragm coupling (14) are all rotatable structures.

6. A high-power, corrosion-resistant, leak-free magnetically driven centrifugal pump according to claim 1, characterized in that, The pump body (1) has a drain cover (19) on the lower front side, an inlet pipe on the front side of the pump body (1), and an outlet pipe on the upper side of the pump body (1).

7. A high-power, corrosion-resistant, leak-free magnetically driven centrifugal pump according to claim 1, characterized in that, The lower rear side of the suspension (12) is fixed with a suspension bracket (18), and the lower ends of the suspension bracket (18) and the protective cover (15) are both fixed on the base plate (17), and the bottom of the motor sleeve fitted on the outside of the motor (16) is fixed on the base plate (17).

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