Looseness-preventing mechanism in reversion of pump impeller

Abstract

The invention relates to a looseness-preventing mechanism in reversion of a pump impeller, which is characterized by comprising the impeller, a cylinder pin, a shaft sleeve, an inner hexagon screw, an upper shaft sleeve, a main shaft, a plane and a coupling thread, wherein the impeller is screwed on the main shaft by the coupling thread; the impeller abuts against the shaft sleeve which abuts against the upper shaft sleeve, so that the axial movement of the impeller is limited; the impeller is connected with the shaft sleeve by the cylinder pin, and the relative movement of the impeller and the shaft sleeve in the circumferential direction is limited, so that the synchronous rotation of the impeller and the shaft sleeve is ensured; and the inner hexagon screw is screwed on the shaft sleeve and abuts against the plane on the main shaft to limit the relative movement the shaft sleeve and the main shaft in the circumferential direction, so that the synchronous rotation of the shaft sleeve and the main shaft is ensured. The looseness-preventing mechanism has the advantages that the taken measure is as follows: the plane is cut on the original main shaft and simple parts such as a column pin, the inner hexagon screw and the like are added, so that the looseness preventing action in reversion of the impeller can be effectively played. The method is very simple, convenient and reliable, and the cost is low.

Description

technical field [0001] The invention relates to a reverse anti-loosening structure of a pump impeller, which belongs to the technical field of pumps. Background technique [0002] In the pump system, when the pump is working normally, it is to transport the liquid in the suction pool to the extrusion pool. The suction pool is in the low water level or low pressure area, and the extrusion pool is in the high water level or high pressure area. For the pump system that transports granular media, fiber media or easy to crystallize, in order to prevent clogging or jamming, no check valve is installed in the outlet pipeline of the pump. However, this will cause when the pump stops, the liquid in the pump outlet pipeline will flow back to the suction pool through the impeller of the pump. When the liquid returns, it will impact the impeller blades and drive the impeller to rotate in reverse. For the impeller and the main shaft, the screw connection is adopted. In this type, the re...

AI Technical Summary

Problems solved by technology

However, this will cause when the pump stops, the liquid in the pump outlet pipeline will flow back to the suction pool through the impeller of the pump. When the liquid returns, it will impact the impeller blades and drive the impeller to rotate in reverse. For the impeller and the main shaft, the screw connection is adopted. For the type, the reverse rotation of the impeller will cause the impeller to loosen from the main shaft, make the impeller move forward, and get stuck on the front cover of the impeller, which may damage the impeller

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