Flow passage structure of regenerative pump

Abstract

Disclosed is the interval channel structure of a regenerative pump, which comprises the vane interval channel of a closed impeller and a pump shell interval channel; an impeller is provided with radial vanes; the space between the two vanes on the same side construct the radial vane interval channel; the vane interval channel includes a vane inlet, a vane inlet root arc, a vane lateral plate, a vane hub plate, a vane outlet and a vane root; a pump shell has an arc-shaped interval channel section; the interval channel section includes the interval channel inner wall top part, the interval channel lateral side inner wall and the interval channel bottom inner wall; the largest width of the interval channel section is close to the inlet of the vane; the interval channel inner wall top part is close to the vane outlet; the inner diameter of the interval channel inner wall top part is more than the largest outer diameter of the impeller; the corner angle of the interval channel inner wall top and the interval channel lateral side inner wall is an obtuse angle; the interval channel lateral side inner wall is extended to be open towards the section of the interval channel with the largest width and smoothly connected with the interval channel bottom inner wall; the interval channel bottom inner wall furls towards the vane inlet; the interval channel bottom inner wall maintains smooth with the vane inlet root arc. The interval channel structure of a regenerative pump can improve the noise problem of the regenerative pump and improve the output flow.

Description

【Technical field】 [0001] The present invention relates to a low-noise regenerative pump enclosed impeller and pump casing flow channel structure, in particular to a structure used to improve the intense flow interference between the fluid in the pump casing flow channel and the blades of the impeller. The interference phenomenon is the source of the noise generated by the regenerative pump, and will reduce the output flow of the pump. The cross section of the circulating channel of the pump casing of the present invention has the largest section width on the blade inlet side, which can ensure that the return flow line of the channel section is at both the inlet and outlet of the blade. With a better radius of curvature, the blades of the closed impeller only work on the fluid circulating in the flow channel and not on the fluid in the vortex area of ​​the return flow, which reduces the flow velocity of the vortex in the vortex area, and the isolation of the side plate of the cl...

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Problems solved by technology

[0015] 2. In the backflow mode on the flow channel section, the vortex area in the middle of the backflow area will interfere with the blade side and its sharp point, which will seriously affect the pump performance and noise

[0016] 3. In the backflow mode on the flow channel section, the radius of curvature of the blade inlet and outlet streamlines is too small, which seriously affects the performance and noise of the pump

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