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Multi-sealing easy-to-maintenance efficient double-suction centrifugal pump

An easy-to-maintain, centrifugal pump technology, applied in the field of centrifugal pumps, can solve the problems of poor airtightness, difficult processing of long shaft sleeves, complex structure, etc., to improve cavitation performance, improve impeller inlet flow state, and increase inlet area. Effect

Inactive Publication Date: 2010-06-02
常州东申泵业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to overcome the defects of complex structure, difficult processing of long shaft sleeves and poor airtightness in the prior art, a multi-sealed centrifugal pump with simple structure and good airtight performance is provided, which is easy to maintain and high-efficiency.

Method used

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  • Multi-sealing easy-to-maintenance efficient double-suction centrifugal pump
  • Multi-sealing easy-to-maintenance efficient double-suction centrifugal pump
  • Multi-sealing easy-to-maintenance efficient double-suction centrifugal pump

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Embodiment Construction

[0018] Such as figure 1 , 2 The first embodiment of the present invention shown in Figure 3 is a multi-seal, easy-to-maintain, high-efficiency double-suction split centrifugal pump with an impeller 1, a pump shaft 2, and a pump body 3. The impeller 1 and the pump shaft 2 are connected by keys, Installed together in the pump body 3. A section of thread is provided on the pump shaft 2 on both sides of the impeller hub, and the impeller nut 5 for fixing and adjusting the center of the impeller 1 is installed on it. A packing shaft seal device is installed between the pump shaft 2 and the pump body 3. 5. The shaft sleeve 4 and the impeller 1 do not share keys, do not touch, and do not interfere. The shaft sleeve 4 and the pump shaft 2 are sealed with two O-rings 6; the shaft sleeve 4 is fixed with the positioning key 10 and the sleeve pressing ring 11; the shaft sleeve 4 and the pump body 3 are sealed with a packing shaft seal device 9 seal.

[0019] Such as Figure 4 In order to ...

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Abstract

The invention relates to a centrifugal pump, which has an impeller, a pump spindle, a pump case, a shaft sleeve and a sealing device. The impeller is connected with the pump spindle key and they are mounted in the pump case together. On the pump spindle on both sides of the impeller hub is disposed a section of screw-thread, on which are mounted a fixed impeller and an impeller nut for regulatingthe impeller centre. Each side of the impeller is fixed with two impeller nuts. The key is only needed to fix the impeller and it need not to be sealed in the hub position.

Description

Technical field [0001] The invention relates to a centrifugal pump, in particular to a multi-seal type, easy-to-maintain and high-efficiency double-suction split centrifugal pump. Background technique [0002] Conventional double-suction split centrifugal pumps such as Figure 5 , Image 6 As shown, the impeller is fixed on the pump shaft through the shaft sleeves at both ends, and the entire shaft sleeve passes through the sealing cavity and is locked with a shaft sleeve nut. To ensure that the center of the impeller coincides with the center of the pump casing, the sleeve nut also plays a role in adjusting the center of the impeller. In order to ensure that the pumped liquid does not flow out between the pump shaft and the shaft sleeve, a gasket must be added at the end of the shaft sleeve and the impeller hub, and the impeller and the shaft sleeve share a key, which requires the diameter of the impeller hub to be large enough to Ensure that there is enough sealing area after i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F04D1/00F04D29/62F04D29/043F04D29/24F04D29/10F04D29/12
Inventor 王俊龙汪淑君
Owner 常州东申泵业有限公司
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