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Guide for pumps

A technology for guides and pumps, applied in the field of rotating machinery, can solve the problems of narrow working range and high level of vibration and pulsation, and achieve the effects of high shell strength and simple and effective structural scheme.

Active Publication Date: 2014-03-12
NO 11 INST OF NO 6 ACADEMY OF CHINA AEROSPACE SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the technical problems of narrow working range and high vibration pulsation level of the existing vane-type guide pump, the present invention provides a pump guide with a new structure, which can improve the performance of the existing pump and reduce the pulsation and vibration of the pump Level

Method used

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Embodiment Construction

[0026] figure 1 It is a front view of the pump guide device of the present invention, which is also a preferred embodiment of the present invention. The main structure is an annular part tightly surrounding the outlet of the impeller. Channels are provided on the annular part as guides, and at the outlet of the guides is a liquid collector with an annular space. The annular part comprises: an inner cylindrical surface (inner surface) 1 of the ring; an outer cylindrical surface (outer surface) 2 of the ring; a group of circumferentially uniform passages extending substantially radially from the inner surface to the outer surface, the passages having a circular cross-section, The centerline of the channel is a straight line. The size of each channel of the guide increases along the flow direction of the impeller, and each channel is composed of an inlet cylindrical section (straight section) 3 and an outlet conical section (flared section) 4. The centerlines of the passages a...

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Abstract

The invention provides a guide for pumps, which is applicable to centrifugal pumps, and the impact loss of the guide can be reduced, so that the purpose of reducing pump pressure fluctuation and pump vibration is achieved. The guide is an annular part arranged on the outlet of an impeller, and the annular part comprises a group of round hole passages. The essence of the guide is that the specific secondary flow of the rectangular passages of the blade type guide is eliminated by the round-section passages and that the impact loss of the inlets is reduced by the sweepback effect of the elliptic inlet brims of the round hole passages which are naturally formed at the inlets. The vibration magnitude of a pump can be remarkably decreased by the guide, so that the performance and reliability of the pump are enhanced, and the guide can be popularized and applied in like large-size high-pressure pumps.

Description

technical field [0001] The present invention belongs to the field of rotating machinery, and more particularly, to centrifugal pumps. Background technique [0002] The pump outlet part is used to collect the liquid flowing from the impeller and convert the kinetic energy of the liquid into pressure energy. When the head of the pump is high, the pressure and flow rate at the outlet of the pump impeller are very high, the impact loss and friction loss of the guide are very large, and it is accompanied by a large vibration impact. Therefore, for high-power turbo pumps, a guide structure with higher performance must be selected. It is best to use a vaneless guide, but for high-power pumps, this will lead to a very thick pump casing, which is unacceptable for liquid rocket engine pump products. Generally, on high-power turbo pumps, in order to improve the strength of the pump casing and reduce the weight, an annular vane guide is arranged in the outlet part. [0003] At presen...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F04D29/44
Inventor 陈晖李向阳李惠敏王文廷王晓锋韩飞苗旭升宣统李昌奂于晴李春乐毛凯张聃
Owner NO 11 INST OF NO 6 ACADEMY OF CHINA AEROSPACE SCI & TECH
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