An anti-cavitation double-suction split pump and its working method

Abstract

The invention discloses an anti-cavitation double-suction split pump, which comprises a pump cover, an oil nozzle and a spiral groove. The top of the pump body is equipped with a pump cover, and one end of the pump body is equipped with an anti-cavitation mechanism; When the liquid enters the feeding and cutting pipe through the telescopic tube, it acts on the guide impeller and drives the connecting shaft to rotate under the exhaust column, generating centrifugal force to drive the liquid to rotate and flow in the conical working chamber, centrifugal separation occurs between the gas and liquid, and the gas gathers toward the center And as the liquid flow rate increases, the axial gas pressure difference is caused, so that the gas flows towards the bottom of the cone, and passes through the through groove of the exhaust column, and then is discharged from the exhaust groove to remove a large amount of air in the liquid, and then passes through the pump body. The air contained in the liquid is greatly reduced, which will eliminate the cavitation caused by the air in the liquid to the pump body, reduce the erosion and corrosion of the flow-passing parts, ensure the working performance of the double-suction split pump, and improve the service life of the double-suction split pump .

Description

technical field [0001] The invention relates to the field of split pumps, in particular to an anti-cavitation double-suction split pump and a working method thereof. Background technique [0002] Split pump, also known as single-stage double-suction centrifugal pump, its main feature is the large flow rate of the conveying medium; the working principle of split pump operation is to install the impeller in the pump casing and fasten it on the pump shaft. The shaft is directly driven by the motor, and there is a liquid suction in the center of the pump casing that is connected to the suction pipe, and the liquid enters the pump through the bottom valve and the suction pipe. The liquid discharge port on the pump casing is connected to the discharge pipe. When the pump speed is constant, the pressure head and flow rate are related to the diameter of the impeller. [0003] When the split pump is working, the servo motor drives the rotating shaft and the blades to rotate to reali...

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Problems solved by technology

[0004] The object of the present invention is to provide an anti-cavitation double-suction split pump and its working method. In order to overcome the above-mentioned split pump when it is working, it drives the rotating shaft and blades to rotate through the servo motor to realize the liquid delivery. When the body and the bearing are rotated and installed, the insufficient lubrication of the rotating shaft between the bearings will cause the vibration frequency and amplitude of the split pump to be high during long-term work. At the same time, when the split pump works and circulates, the cavitation phenomenon is an important hazard factor affecting the pump outlet flow and head. When cavitation occurs, the flow-passing parts will be corroded and corroded. Damage, the performance of the pump suddenly drops, and in severe cases, 600-25000Hz noise and unit vibration are generated. The mutual excitation of the two causes the pump to produce strong cavitation resonance, which leads to major accidents of equipment damage. The main cause of cavitation is water The naturally contained air and liquid begin to vaporize and generate bubbles in the pump body, and the bubbles burst when they enter the high-pressure area of ​​the pump body with the liquid flow, and the surrounding liquid quickly fills the cavity of the original bubbles, resulting in a technical problem of hydraulic impact

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