Low-cavitation-allowance low-pressure pulsation centrifugal pump

A NPSH and low pressure technology, applied in the direction of pumps, pump components, non-variable pumps, etc., can solve the problem of the ability of the inducer to reduce NPSH, the large range of pressure and speed changes, and the reduction of NPSH To reduce the amount of excavation, smooth flow, and reduce infrastructure investment
CN107956737APending Publication Date: 2018-04-24SHANDONG SHUANGLUN
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
SHANDONG SHUANGLUN
Publication Date
2018-04-24

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Abstract

The invention discloses a low-cavitation-allowance low-pressure pulsation centrifugal pump. The low-cavitation-allowance low-pressure pulsation centrifugal pump mainly comprises a pump body, a pump shaft and an impeller and is characterized in that a unique runner structure and a unique blade arrangement manner are adopted in the impeller, an energy conversion device is arranged on an inlet of theimpeller, and comprises an energy conversion component, a liquid guide pipe and an adjusting valve, a liquid guide groove is formed in the outer wall of the energy conversion component, jet flow ribplates are arranged on the circumference of the inner wall of the energy conversion component in an array manner, the outer wall of the energy conversion component is fixedly connected with the innerwall of a suction chamber of the pump body, the front end of the energy conversion component is fixedly connected with the pump body, a liquid outlet through hole is formed in the high-pressure area side wall of the pump body, a liquid inlet through hole is formed in the side wall of the low-pressure area, one end of the liquid guide pipe is communicated with the liquid outlet through hole, the other end of the liquid guide pipe is communicated with the liquid inlet through hole, the adjusting valve is arranged on the liquid guide pipe, and the liquid inlet through hole is communicated with the liquid guide groove. The centrifugal pump has the beneficial effects of being high in cavitation resistance capacity, stable and reliable in running, capable of prolonging the service life and reducing vibration and noise and the like.
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Description

technical field

[0001] The invention relates to the technical field of hydraulic mechanical engineering, in particular to a low NPSH and low pressure pulsation centrifugal pump. Background technique

[0002] In terms of water diversion projects, water pumps are required to have as low a NPSH as possible, which can reduce the excavation of the foundation of the entire pump house and reduce the amount of infrastructure investment. Under the premise of the same pump room height, the use of low NPSH pumps can slow down or even eliminate the phenomenon of blade perforation caused by cavitation, and avoid unplanned downtime maintenance and losses.

[0003] At present, the method of reducing the NPSH of the centrifugal pump mainly focuses on increasing the inlet area of ​​the blade, but because the impeller structure size is limited by the flow and head design parameters, the effect of reducing the NPSH of the pump by this method is very good. limited.

[0004] In order to solve ...

Claims

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