Improved sealing ring structure for horizontal middle opening double suction pump

A sealing ring and double-suction pump technology, which is applied to parts of pumping devices for elastic fluids, non-variable pumps, pumps, etc., can solve the problems of impeller wear and tear, avoid direct wear and reduce maintenance costs Effect

Inactive Publication Date: 2011-10-19
HITACHI PUMP MFG WUXI
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  • Summary
  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

[0003] In view of the above problems, the present invention provides an improved sealing ring structure for horizontal split double-suction pumps, which can effectively solve the problem that the impeller is easy to wear due to the sealing ring being directly placed on the impeller in the past, thereby reducing equipment replacement and maintenance. cost

Method used

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  • Improved sealing ring structure for horizontal middle opening double suction pump
  • Improved sealing ring structure for horizontal middle opening double suction pump
  • Improved sealing ring structure for horizontal middle opening double suction pump

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Embodiment Construction

[0009] See figure 2 , The structure of the present invention includes a seal ring 1, the seal ring 1 is installed at the inlet of the impeller 2, an impeller wear-resistant ring 7 is installed between the seal ring 1 and the impeller 2, and the gap fit between the seal ring 2 and the impeller wear-resistant ring 7. The impeller wear-resistant ring 7 is fixed to the impeller 2 by fastening screws; the surface hardness of the sealing ring 1 reaches HRC40.5-46, and the surface hardness of the impeller wear-resistant ring 7 reaches HRC60-68. Among them, the sealing ring material can be precipitated martensitic stainless steel, the outer circle of the impeller wear ring is made of hard alloy Co-Wc for supersonic thermal spraying, and the coating hardness is HV1200-1500, which improves the surface hardness of the impeller wear ring 7 .

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Abstract

The invention provides an improved sealing ring structure for a horizontal middle opening double suction pump, which can effectively solve the problem that an impeller is easy to wear because a sealing ring is directly sleeved on the impeller in the prior art so as to reduce cost for replacing and maintaining equipment. The sealing ring structure comprises a sealing ring arranged at the inlet of an impeller, and is characterized in that: an impeller wear-resistant ring is arranged between the sealing ring and the impeller; and the sealing ring is in clearance fit with the impeller wear-resistant ring.

Description

technical field [0001] The invention relates to the technical field of centrifugal pump construction, in particular to an improved sealing ring structure for a horizontal split double-suction pump. Background technique [0002] Generally, the double-suction sealing ring used for horizontal split double-suction pumps is directly set on the impeller, see the attached figure 1 , the double-suction sealing ring is to reduce the flow of water in the pump chamber from the high-pressure side to the inlet side of the impeller through the gap seal to increase the volume ratio. When the pump is working, one side of the sealing ring 1 is the high-pressure chamber 4, and the other side is the low-pressure chamber 5. The high-pressure chamber The rapid serial flow of water from 4 to the low-pressure chamber 5 is easy to cause wear on the clearance surface between the sealing ring 1 and the impeller 2, especially when the water contains a large amount of sediment, it will cause serious we...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F04D29/08
Inventor 霍杭如
Owner HITACHI PUMP MFG WUXI
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