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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 problems such as 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: 2007-06-06
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

Examples

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Embodiment Construction

[0018] The first embodiment of the present invention shown in Figures 1, 2, and 3 is a multi-sealed, easy-to-maintain, high-efficiency double-suction split centrifugal pump, which has an impeller 1, a pump shaft 2, and a pump body 3. The impeller 1 and the pump The shaft 2 is keyed and installed together in the pump body 3. A section of thread is set on the pump shaft 2 on both sides of the hub of the impeller 1, and the impeller nut 5 for fixing and adjusting the center of the impeller 1 is installed on it, between the pump shaft 2 and the pump body 3 The packing shaft seal device 5 is installed, and the shaft sleeve 4 and the impeller 1 do not share keys, do not contact, and do not interfere. Two O-rings 6 are used for sealing between the shaft sleeve 4 and the pump shaft 2, the shaft sleeve 4 is fixed with the positioning key 10 and the shaft sleeve pressure ring 11, and the packing shaft seal device 9 is used between the shaft sleeve 4 and the pump body 3 seal.

[0019] A...

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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 regulating the 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 are shown in Figures 5 and 6. The impeller is fixed on the pump shaft through bushings at both ends, and the entire bushing passes through the sealing chamber and is locked with bushing nuts. In order to ensure that the center of the impeller coincides with the center of the pump casing, the sleeve nut also plays the role of 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 joint between the end face of the shaft sleeve and the hub of the impeller, and the impeller and the sleeve share a key, which requires that the diameter of the hub of the impeller must be large enough to Make sure there is en...

Claims

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Application Information

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Patent Type & Authority Applications(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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