Jet device capable of improving cavitation performance of jet type centrifugal pump

A technology for centrifugal pumps and jets, applied in the field of jets, can solve the problems of induced vibration and noise, drop of head of jet centrifugal pumps, and restricted flow operating range, etc., to achieve the effect of increasing the operating range

Active Publication Date: 2016-08-31
JIANGSU UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As the flow rate increases, cavitation will occur inside the throat of the ejector, resulting in a sharp drop in the head o

Method used

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  • Jet device capable of improving cavitation performance of jet type centrifugal pump
  • Jet device capable of improving cavitation performance of jet type centrifugal pump
  • Jet device capable of improving cavitation performance of jet type centrifugal pump

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Embodiment Construction

[0031] image 3 Shown is a schematic structural view of an ejector 2 that can improve the cavitation performance of a jet-type centrifugal pump according to the present invention. The ejector 2 of the jet-type centrifugal pump includes a nozzle 21, a drainage section 22, a mixing section 23, a throat Tube 24, diffuser section 25 and booster hole 26.

[0032] Such as figure 2 As shown, when the jet centrifugal pump operates under the condition of large flow rate, cavitation will occur inside the throat of the jet, which will cause the pump head to drop sharply and induce vibration and noise at the same time. Such as Figure 4 As shown, when the booster hole 26 is designed at the throat 24 of the ejector 2, the booster hole 26 introduces the high-pressure liquid in the pump chamber 5 into the low-pressure area of ​​the throat 24, increases the pressure in the low-pressure area of ​​the throat 24, and improves the jet flow. Anti-cavitation performance of centrifugal pump ejec...

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Abstract

The invention relates to a jet device capable of improving the cavitation performance of a jet type centrifugal pump. The jet device comprises a nozzle, a flow guide section, a mixing section, a hollow tube, a dispersing section and a pressure increasing hole. According to the jet device, when the jet type centrifugal pump runs under a large-flow-rate working condition, the pressure increasing hole designed in the hollow tube of the jet device can guide high pressure liquid from a pump chamber into a low pressure area in the hollow tube, so that the pressure of the low pressure area of the hollow tube can be increased, the cavitation which leads to vibration and noise in the hollow tube of the jet device can be inhibited, and the phenomenon that the lift of the jet type centrifugal pump decreases sharply due to the cavitation occurring in the hollow tube of the jet device can be reduced; a lift stopping point can be deviated close to large flow rate, so that the running range of the jet type centrifugal pump can be expanded.

Description

technical field [0001] The invention relates to an ejector which is the main part of a jet-type centrifugal pump, in particular to an ejector which can improve the cavitation performance of the jet-type centrifugal pump. Background technique [0002] The jet-type centrifugal pump is an electric pump designed in combination with a jet and a centrifugal pump. It has the advantages of compact structure, convenient operation, no need for irrigation for the second start, no need to install a bottom valve, and self-priming. It is used in garden drip irrigation, It is widely used in water-saving systems such as agricultural sprinkler irrigation. Compared with traditional centrifugal pumps, jet centrifugal pumps operate on the principle that the high-pressure liquid flowing from the pump guide vanes into the pump cavity forms a partial vacuum in the mixing section through the nozzle jet, so that the liquid in the pump inlet pipe passes through the pump under the action of atmospheri...

Claims

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Application Information

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IPC IPC(8): F04F5/10F04D9/06
CPCF04D9/06F04F5/10
Inventor 李贵东王洋赵立峰冒杰云曹璞钰胡日新
Owner JIANGSU UNIV
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