Anti-cavitation centrifugal pump and manufacturing method thereof

Abstract

The invention discloses a cavitation-resistant centrifugal pump and a manufacturing method thereof. The device includes a pump casing, an impeller and an inducer, the impeller is arranged in the pump casing, the pump casing is provided with a water inlet jacket, and the inducer is arranged in the water inlet jacket , also includes a support ring, the support ring is provided with deflectors, the water inlet sleeve is provided with a groove, the support ring is set in the groove, the water inlet sleeve is threadedly connected with a clamping ring, the support ring is provided with a clamp ring, and the clamping ring Snap the collar tightly. The manufacturing method adopts a. processing preparation; b. deflector processing; c. pump casing processing; d. assembly of pump body; e. processing of water inlet sleeve; f. deflector installation; g. overall assembly; h. Eight steps to test the manufacture of centrifugal pumps. The invention can make the flow field of the water inlet jacket uniform, reduce the backflow area, effectively reduce the unstable state induced by the rotating cavitation, ensure the stable operation of the pump body, and optimize the manufacturing steps with simple steps by setting the deflector on the water inlet jacket , high manufacturing efficiency and easy implementation.

Description

technical field [0001] The invention belongs to the technical field of centrifugal pumps, in particular to an anti-cavitation centrifugal pump and a manufacturing method thereof. Background technique [0002] High-speed centrifugal pumps are widely used in petrochemical, aerospace and other fields. Due to the high speed and low flow rate of high-speed centrifugal pumps, cavitation is easy to occur at the pump inlet, and cavitation occurs under low flow conditions. Therefore, high-speed The long-term safe and stable operation of the pump is the key to hydraulic design. At present, installing an inducer in a high-speed centrifugal pump has become a key technology to ensure that the pump obtains superior cavitation performance. When the inducer is used in a high-speed centrifugal pump, its working conditions often change during operation, and it is often accompanied by complex cavitation phenomena. The instability of the inlet flow field caused by backflow is considered to be ...

AI Technical Summary

Problems solved by technology

When the inducer is used in a high-speed centrifugal pump, its working conditions often change during operation, and it is often accompanied by complex cavitation phenomena. The instability of the inlet flow field caused by backflow is considered to be an important reason for inducing rotating cavitation. , even when the inducer is running normally, its internal flow is more complicated due to the twisted blade flow path; when the inducer is cavitating during operation, it is easy to generate cavitation unstable flow phenomenon inside, and cavitation occurs, causing The severe fluctuation of the system flow and pressure will generate vibration and noise, which will seriously affect the stable operation of the pump body.

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