Valve flow-distribution reciprocating pump with induced wheel

Abstract

The invention discloses a valve flow-distribution reciprocating pump with an induced wheel, and aims to provide a valve flow-distribution reciprocating pump which is provided with a set of induced wheel device to effectively reduce cavitation phenomena and has the characteristics of low cavitation damage, long service life, small vibration, low noise, wide application field, high stroke frequency and the like. The pump comprises the induced wheel, an induced wheel shell and an induced wheel shaft, wherein the induced wheel is fixed on the induced wheel shaft; the induced wheel shaft and a pump main motor shaft are connected through a transmission device and are driven to rotate through a motor; the induced wheel shell is a hollow pipeline; the induced wheel is arranged in the induced wheel shell; the induced wheel and the induced wheel shaft are coaxial with the induced wheel shell; and the induced wheel is a pitch-variable induced wheel with a small inlet vane angle and a large outlet vane angle.

Description

technical field [0001] The invention relates to a reciprocating pump, in particular to a valve distribution reciprocating pump with an induction wheel. Background technique [0002] Reciprocating pumps have been attracting people's attention because of their high efficiency and wide application fields. [0003] When the valve-distributed reciprocating pump with suction and discharge valves works in the following scenarios, the suction work will deteriorate and abnormal phenomena such as cavitation, water hammer, and knocking will occur: [0004] 1. When the temperature of the liquid medium is relatively high; [0005] 2. When the number of strokes of the pump is relatively high and the piston movement is relatively fast; [0006] 3. When the conveying medium is a liquid medium with high viscosity. [0007] The reason for the problem is that the inlet valve of the reciprocating pump has a large liquid resistance, so that in the above scenario, the speed of the fluid enteri...

AI Technical Summary

Problems solved by technology

[0004] 1. When the temperature of the liquid medium is relatively high;

[0005] 2. When the number of strokes of the pump is relatively high and the piston movement is relatively fast;

[0007] The reason for the problem is that the inlet valve of the reciprocating pump has a large liquid resistance, so that in the above scenario, the speed of the fluid entering the cylinder through the inlet valve is lower than the speed of the increase in the volume of the pump cylinder caused by the movement of the piston, causing the pump to The pressure in the cylinder decreases, the liquid in the cylinder reaches its saturated vapor pressure and vaporizes, and cavitation occurs

When cavitation occurs, in addition to causing fatigue erosion and electrochemical corrosion on the metal surface, the reciprocating pump will also produce water hammer impact, which will increase the vibration and noise of the pump

[0008] In high-speed centrifugal pumps, in order to reduce the occurrence of cavitation, there are reports in the literature that an inducer is installed at the inlet, but no literature on the application of an inducer in a reciprocating pump has been retrieved.

Images