Treatment method for high-cavitation peripheral pump impeller

Abstract

The invention discloses a treatment method for a high-cavitation peripheral pump impeller, and belongs to the field of peripheral pumps. The cavitation performance of a closed peripheral pump is effectively improved by welding buffering feather scales on the basis of an existing impeller, the buffering feather scales prevent liquid from being in direct contact with blade grooves, impact on the blade grooves due to bubble breakage is prevented, the blade is protected well, the V-shaped structure of the buffering feather scale plays a role in guiding the liquid entering and exiting from the blade grooves in the longitudinal vortex motion, so that the impact of the liquid can be effectively weakened, the energy loss is reduced to a certain extent, and the working efficiency is effectively improved; the impact buffering piece on the buffering feather scale intercepts and divides bubbles by utilizing a bubble retaining ball, gas in the bubbles enters a defoaming spherical shell through a breathable film, the bubble rate in liquid is effectively reduced, and the elastic force of an elastic horn on the impact buffering piece can absorb part of impact energy generated when the bubbles are broken; and the cavitation performance of the peripheral pump is effectively improved.

Description

technical field [0001] The invention relates to the field of vortex pumps, in particular to a method for treating impellers of highly cavitating vortex pumps. Background technique [0002] Vortex pump is a kind of vane pump. In terms of principle and structure, it is different from centrifugal and axial flow pumps. It is called a vortex pump because it sucks and discharges liquid by making the liquid vortex motion when the impeller rotates. There are three types of vortex pumps: closed type, open type and centrifugal type. Closed vortex pump adopts closed impeller and open channel structure. The closed impeller refers to an impeller with a middle partition on the blade part and relatively short blades. The suction and discharge ports of the pump are separated by the tongue part. Communicate through the flow channel. This kind of flow channel directly connected with the suction and discharge ports is called an open flow channel. [0003] In a closed vortex pump, when the...

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Problems solved by technology

[0004] However, the inlet liquid flow of the closed vortex pump flows from the outer edge of the impeller to the root of the blade groove, the flow velocity is unevenly distributed, and the impact is relatively large, so the cavitation is poor, which greatly reduces the service life of the impeller, and cavitation can also cause corrosion. There is a great potential safety hazard for pumps that transport energy, chemical and other liquids, and the current closed vortex pumps have no measures to solve this problem

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