Axial force balancing device of pump

A technology of balancing device and axial force, which is applied to parts, pumps, and pump elements of pumping devices used for elastic fluids, and can solve the problem of high manufacturing cost and poor axial force balance of static ring compensation balanced mechanical seals. No guarantee, high control precision requirements, etc., to avoid axial movement and pulsation, safe and reliable use process, and improve the effect of shaft sealing

Inactive Publication Date: 2009-07-29
杨丽萍
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This structure basically has no leakage when it works normally, and the efficiency is very high. However, the manufacturing cost of the static ring compensation balanced mechanical seal is high, and the requirements for the processing and overall assembly control accuracy of other parts ar

Method used

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  • Axial force balancing device of pump
  • Axial force balancing device of pump

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Experimental program
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Effect test

Embodiment Construction

[0016] Attached below figure 1 Embodiment 1 of the present invention is described:

[0017] In this embodiment 1, the axial force balance device of this pump of the present invention consists of a stepped floating seal sleeve 1, an impeller 3, a body 4, a rotating main shaft 6, a stepped balancing drum 7, a mechanical seal moving ring 9, a shaft Sleeve 10, mechanical seal static ring 12, seal cover 13 and related seals and connectors, the step-type floating seal sleeve 1 is sealed and floated on the inner cavity of the body 4 at the rear end of the impeller 3 through the seal sleeve seal ring 2, The axial seal and axial force balance between the stepped floating seal sleeve 1 and the impeller 3 rely on the automatic axial displacement of the stepped floating seal sleeve 1 under the action of pressure changes, and the floating gap between the stepped floating seal sleeve 1 and the impeller 3 The impeller 3 is fixedly installed on the rotating main shaft 6 through the impeller ...

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PUM

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Abstract

The invention relates to an axial force balancing device of a pump, which is characterized in that an engine body at the rear end of an impeller is provided with one or a set of step type floating sealing sleeve(s). When in work, under the condition of changeable pressure at the two ends, the step type floating sealing sleeve(s) can automatically regulate the axial clearance with the impeller, thereby having the effects of reducing leakage flow rate and automatically balancing axial force; a rotating main shaft at the rear end of the impeller is provided with a step type balancing drum matched with the step type floating sealing sleeve(s); the step type balancing drum is not only matched with the function that the step type floating sealing sleeve(s) can automatically regulate the axial clearance with the impeller, but also preserves the function of the traditional balancing drum, and has the effect of labyrinth clearance seal. The axial force balancing device of the pump has compact structure and small axial dimension, is high in the generalized degree with the existing products and parts, can greatly reduce the volume loss and disk friction loss, improves the efficiency of the pump, and has the characteristics of simple structure, low manufacturing cost as well as safe and reliable use.

Description

technical field [0001] The invention relates to an axial force balance device, in particular to an axial force balance device of a pump. Background technique [0002] In the axial force balance device of the existing structure of the segmented multistage centrifugal pump, the vertical pump generally adopts the balance drum structure; the horizontal pump generally adopts the balance disc structure. in: [0003] The structure of the balance drum device is relatively simple. The pressure difference between the two ends of the balance drum is realized by connecting one end with the inlet low-pressure end. The leakage flow rate is determined by the radial gap between the balance drum and the balance sleeve and the frictional resistance of the disc. The leakage flow of existing traditional structure products is 5% to 18% of the rated flow (inversely proportional to the specific speed of the water pump), and the volume leakage loss is very large. [0004] The balance disc works b...

Claims

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Application Information

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IPC IPC(8): F04D29/041F04D29/08
Inventor 杨丽萍
Owner 杨丽萍
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