Adjustable experiment device for researching time sequence effect of guide vane of multistage centrifugal pump

Abstract

The invention discloses an adjustable experiment device for researching a time sequence effect of a guide vane of a multistage centrifugal pump. The device comprises a postpositional water outlet endvolute, a postpositional guide vane, an impeller, an indicating device and a ratchet wheel device, wherein the postpositional water outlet end volute, the postpositional guide vane, the ratchet wheeland the indicating device are matched with one another, on the basis that the multistage centrifugal pump is not disassembled, the ratchet wheel device is additionally arranged on a rotating shaft andis connected with the back of the postpositional guide vane, the rotating shaft is rotated to realize the rotation of the postpositional guide vane, the placement angle of the postpositional guide vane and a prepositional guide vane is changed, so that the effect of different time sequences of the prepositional guide vane and the postpositional guide vane is achieved, the indicating device is additionally arranged on the outer side of the postpositional guide vane at the same time to display the change angle of the postpositional guide vane. According to the adjustable experiment device, thelift and the efficiency of the multistage centrifugal pump are improved, the pump has good cavitation resistance and the anti-vibratility, the comprehensive performance of the multistage centrifugal pump is improved, and the disassembly and assembly of the multistage centrifugal pump are avoided.

Description

technical field [0001] The invention belongs to the field of multistage centrifugal pumps, in particular to an adjustable experimental device for studying the timing effect of guide vanes of multistage centrifugal pumps. Background technique [0002] Multistage centrifugal pumps are widely used in important fields of national economy such as fire protection, metallurgy, chemical industry and electric power. For a long time, the hydraulic design of multistage centrifugal pumps has adopted the design method of single pump, and the reflection of flow between stages has not been considered. In recent years, more and more studies and engineering practices have shown that the flow interference between stages of multistage centrifugal pumps has a very significant impact on pump performance. Therefore, how to apply interstage flow interference to improve the performance of multistage centrifugal pumps has become a research hotspot in the field of machinery. Among them, optimizing p...

AI Technical Summary

Problems solved by technology

However, at present, under the condition of non-uniform flow, the timing effect of the rear guide vane and the front guide vane on the performance of radial hydraulic machinery is still rare.

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