Axial force self-balancing device and method for a single-stage single-suction centrifugal pump

Abstract

The embodiment of the present invention provides an axial force self-balancing device and method for a single-stage single-suction centrifugal pump, which relates to the field of water pump equipment. The axial force self-balancing device includes: a pump body, an impeller arranged in the pump body, an The pump back cover on one side, the shaft sleeve set in the shaft hole of the pump back cover and the pump shaft connected to the impeller after passing through the shaft sleeve at one end; the front cavity is enclosed between the front cover plate of the impeller and the pump body, There is a first gap between the front sealing ring of the impeller and the pump body, the front cavity communicates with the inlet of the impeller through the first gap, a balance chamber is enclosed between the back cover of the impeller and the back cover of the pump, and the rear sealing ring of the impeller is respectively There is a second gap between the pump body and the pump back cover, and a plurality of balance holes are arranged at intervals on the back cover. The balance holes extend to the shaft sleeve and form a third gap with the shaft sleeve. The impeller realizes axial force self-balancing through self-adjustment, without adding devices such as back blades, balance discs or balance drums. The structure is simple, easy to process, and effectively reduces costs.

Description

technical field [0001] The invention relates to the field of water pump equipment, in particular to an axial force self-balancing device and method for a single-stage single-suction centrifugal pump. Background technique [0002] Centrifugal pumps are one of the most widely used general-purpose equipment in production and life, among which single-stage single-suction centrifugal pumps are the most common. Due to the pressure difference between the front shroud and the rear shroud, axial pressure will be generated, and the force will increase as the blade twist increases. Therefore, the pump shaft is usually subjected to various stresses caused by multiple forces and moments. If not properly balanced, these forces will act on the shaft causing the shaft to deflect and be transmitted to the bearings causing overloading. In order to avoid the failure of pump shafts, bearings and other components, it is of great significance to design a self-balancing method for the axial forc...

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Problems solved by technology

[0008] The embodiment of the present invention provides an axial force self-balancing device and method for a single-stage single-suction centrifugal pump, which is used to solve the complex structure, high cost and hydraulic problems of the centrifugal pump axial force self-balancing design method and device in the prior art. The problem of inefficiency

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