Anti-stall double-layer pump inlet structure

Abstract

The invention provides an anti-stall double-layer pump inlet structure. A horn seat and a separation seat are arranged at a pump inlet, the horn seat and the separation seat are both of horn mouth structures, the separation seat covers the surface of the horn seat through a support, and a circle of annular gap is reserved between the separation seat and the horn seat, so that a water inlet flow channel of a pump is divided into two parts, the part located in the center is a main inlet, and a gap between the horn seat and the separation seat forms an auxiliary inlet. The water inlet flow channel of the pump is divided into the main inlet and the auxiliary inlet through the separation seat, when the pump operates under the small-flow working condition, backflow at the inlet of the pump is discharged outwards through the divided auxiliary inlet, thus the main inlet is prevented from being blocked due to the backflow, the stall problem under the small-flow working condition is solved, the anti-stall performance of the pump is improved, and the application range of the pump is widened.

Description

technical field [0001] The invention belongs to the technical field of pumps, and in particular relates to a pump inlet structure for anti-stall. Background technique [0002] A pump is a common mechanical device used for liquid transportation, among which the vane pump is the most important form of pump. The main performance indicators of the vane pump include operating efficiency, anti-cavitation performance, operating stability, etc.; while the existing conventional design usually only guarantees the hydraulic performance of the vane pump under the design working condition, that is, only near the design working point Only then can the liquid in the pump flow smoothly and stably, achieving higher operating efficiency. However, in practical applications, there are factors such as the uncertain external working environment and the accumulated wear and tear of the pump’s mouth ring due to long-term operation, which makes it difficult for the vane pump to always operate under...

AI Technical Summary

Problems solved by technology

The specific performance is: the vane pump will stall when it is running under the condition of small flow, so that the internal flow is disordered, the operation is unstable, and the hydraulic loss increases. Cavitation phenomenon, the hydraulic performance drops sharply, leading to the formation of "saddle area", and generating large vibration and noise

Therefore, the stall will seriously affect the safety and stability of the pump, which needs to be overcome by technical means

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