An 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 the pump inlet, both of which are bell mouth structures. The separation seat is covered on the surface of the horn seat through the support, and the other is There is an annular gap between them, so that the water inlet channel of the pump is divided into two parts, of which the main inlet is located in the center, and the auxiliary inlet is formed by the gap between the horn seat and the separation seat. The water inlet channel of the pump is divided into two parts: the main inlet and the auxiliary inlet through the separation seat. When the pump is running in a small flow condition, the backflow at the pump inlet is discharged outward by the above-mentioned sub-inlet, so as to avoid the main inlet caused by the backflow. Blockage, solve the stall problem under small flow conditions, improve the anti-stall performance of the pump, and expand the scope of application of the pump.

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] Pump is a common mechanical equipment used for liquid transportation, of which 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 operating conditions, that is, only near the design operating point. At this time, the liquid in the pump can flow smoothly and stably and achieve high operating efficiency. However, in practical applications, there are factors such as the uncertain external working environment and the wear and tear of the mouth ring gap accumulated by the pump itself due to long-term operation, which make it difficult for the vane pump to al...

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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