ANTI-BLOCKING AND ANTI-WEAR MULTI-STAGE PUMP

WIPO Patent Application WO/2023/179212

A1

The present invention relates to the field of fluid machinery, and relates to a multi-stage pump for improving anti-blocking and anti-wear performances by utilizing internal circulation high-pressure water jet. Due to the fact that the situation that a multi-stage pump transports sand-containing water is relatively common, the problems such as abrasion, wear, and operation jamming of a key hydraulic component are always key problems restricting the high-speed development of the multi-stage pump. A drainage pipe is combined with a jet ring, and a pressure difference is used for leading out internal circulation high-pressure water to impact a gap part of an impeller outlet and a pump housing, such that solid particles are prevented from being deposited in a front pump cavity to cause wear or operation jamming, meanwhile, the secondary backflow is inhibited, and the hydraulic performance is improved. The invention is mainly used in industries, in which transport mediums contain solid particles, such as deep-sea mineral exploration, mine drainage and sand discharge, and sewage treatment.

HAN YONG (CN)
ZHOU LING (CN)
JIANG LEI (CN)
BAI HONGEN (CN)
LU WEIGANG (CN)

PCT/CN2023/074362

September 28, 2023

February 03, 2023

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WENLING RESEARCH INSTITUTE OF FLUID MACHINERY JIANGSU UNIV (CN)
UNIV JIANGSU (CN)

F04D29/44; F04D7/04

CN114790989A	2022-07-26
CN111425405A	2020-07-17
CN102207092A	2011-10-05
DE490265C	1930-01-25
CN102207091A	2011-10-05
CN110332124A	2019-10-15
CN210317880U	2020-04-14
SU1041758A1	1983-09-15

SUZHOU LUNGHENG INTELLECTUAL PROPERTY FIRM (GENERAL PARTNER) (CN)

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