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Impeller back sealing structure

A technology of sealing structure and impeller, which is applied to components of pumping devices for elastic fluids, non-variable pumps, machines/engines, etc. It can solve the problem of increased sealing gap, impeller axial force cannot be adjusted, and sealing effect Variation and other problems, to achieve the effect of ensuring the sealing effect

Pending Publication Date: 2018-02-23
NANJING CIGU TECH CORP LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] 1) When the axial seal is used, the rotor moves axially, resulting in an increase in the seal gap and poor sealing effect;
[0004] 2) When the radial seal is used, the axial force of the impeller cannot be adjusted

Method used

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Embodiment Construction

[0014] The present invention will be further described below in conjunction with the accompanying drawings.

[0015] Such as figure 1 As shown, the present invention discloses an impeller back sealing structure, including an impeller 1 and a seal seat 4, a groove portion 11 is provided on the back of the impeller 1, and the seal seat 4 is placed in the groove portion 11, and the impeller 1 and the seal seat A rotation gap 10 is formed between the seats 4 .

[0016] A sealing ring 2 is provided on the groove portion 11 of the impeller 1, and the impeller 1 and the sealing ring 2 are integrally formed. A sealing groove 5 is provided on the sealing seat 4 , and the sealing ring 2 extends in the sealing groove 5 .

[0017] In order to further ensure the sealing effect, sealing teeth 3 are provided on the side wall of the sealing ring 2 .

[0018] When in use, the axial dimensions of the seal ring 2, the seal teeth 3 and the seal groove 5 are determined according to the axial mo...

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PUM

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Abstract

The invention discloses an impeller back sealing structure. The impeller back sealing structure comprises an impeller and a sealing seat. A groove part is formed at the back of the impeller, the sealing seat is arranged in the groove part, and a rotating clearance is formed between the impeller and the sealing seat; a sealing ring is arranged on the groove part, a sealing groove is formed in the sealing seat, and the sealing ring extends into the sealing groove; a sufficient effective sealing length can further be ensured even when axial endplay is conducted on a rotor, and the sealing effectis ensured; and the position of a sealing tooth is ensured according to the needs of axial force of the impeller, and reasonable impeller axial force is obtained.

Description

Technical field: [0001] The invention relates to an impeller back sealing structure. Background technique: [0002] The existing impeller back seal is to arrange sealing teeth on the back of the impeller and adopt axial seal, or arrange seal teeth at the main shaft and adopt radial seal. The above sealing structure has the following defects: [0003] 1) When the axial seal is used, the rotor moves axially, resulting in an increase in the seal gap and poor sealing effect; [0004] 2) When the radial seal is used, the axial force of the impeller cannot be adjusted. Invention content: [0005] The present invention provides an impeller back sealing structure in order to solve the above-mentioned problems in the prior art. [0006] The technical solutions adopted in the present invention include: a sealing structure for the back of the impeller, including the impeller and the sealing seat, the back of the impeller is provided with a groove, the sealing seat is placed in the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F04D29/08F04D29/26
CPCF04D29/083F04D29/26
Inventor 孙益龙李健吴立华董继勇
Owner NANJING CIGU TECH CORP LTD
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