Dynamic variable-diameter impeller for constant-pressure pump

Abstract

The invention discloses a dynamic variable-diameter impeller for a constant-pressure pump. The impeller comprises a wheel disc, a hub arranged in the center of the wheel disc and a plurality of bladesconnected with one side face of the wheel disc and the peripheral face of the hub, wherein a variable-diameter device is arranged on the other side face of the wheel disc, the variable-diameter device comprises an upper end cover assembly and a lower end cover assembly, the upper end cover assembly comprises a plurality of upper fan-shaped plates which are evenly distributed in the circumferential direction, protrusions are arranged on bottom surfaces of the upper fan-shaped plates, the lower end cover assembly comprises a plurality of lower fan-shaped plates which are evenly distributed in the circumferential direction, the protrusions are located between every two adjacent lower fan-shaped plates, the upper fan-shaped plate and the lower fan-shaped plate can move outwards and inwards inthe radial direction relative to the wheel disc, springs are arranged between the hub and the upper fan-shaped plate and between the hub and the lower fan-shaped plate, and the springs always have outward elasticity on the upper fan-shaped plate and the lower fan-shaped plate. The impeller is advantaged in that purposes of changing the water outlet flow and keeping constant pressure are achievedby changing the diameter of the water pump impeller.

Description

technical field [0001] The invention relates to the technical field of constant-pressure pumps, in particular to a dynamic variable-diameter impeller for constant-pressure pumps. Background technique [0002] The outlet flow and head of the pump are related to the pump speed and the diameter of the impeller. At present, the constant pressure of the water pump to adjust the flow rate is achieved by adjusting the speed of the water pump, that is, the frequency conversion speed regulation water supply. This method requires a matching frequency converter to control the running speed of the water pump, and the cost is relatively high. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide a dynamic variable-diameter impeller for a constant pressure pump, which automatically changes the diameter of the impeller of the water pump according to the water pressure, so as to achieve the purpose of changing the water flow and keepi...

AI Technical Summary

Problems solved by technology

At present, the constant pressure of the water pump to adjust the flow rate is achieved by adjusting the speed of the water pump, that is, the water supply is controlled by frequency conversion. This method needs to be equipped with a frequency converter to control the running speed of the water pump, and the cost is relatively high.

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