High-speed sealed internal fluid static and dynamic characteristic measurement system

Abstract

The invention discloses a high-speed sealed internal fluid static and dynamic characteristic measurement system. The system comprises a test drill base, a sealed cavity, a driving assembly and a bearing base; a main shaft is horizontally inserted in the sealed cavity along a central axis, bearings are connected to the left and right ends of the main shaft respectively, the bearings are mounted inthe bearing base fixed on the test drill base, one end of the main shaft penetrates through the bearing base and is connected with the driving assembly, the main shaft can rotate under the action of the driving assembly, and the sealed cavity is further connected with a centering mechanism so as to adjust the center line between the main shaft and the sealed cavity to be located on the same straight line, and a sensor assembly is further arranged on the sealed cavity so as to measure the static and dynamic characteristics of the sealed cavity. The driving assembly drives the main shaft to rotate at a high speed, high-pressure fluid is introduced into a water inlet to simulate the working scene of a spiral sealing sleeve of a centrifugal pump, the static and dynamic characteristics of the spiral sealing sleeve at the moment are measured through the sensor assembly, and the problem that the spiral sealing theory cannot be combined with reality is solved.

Description

technical field [0001] The invention belongs to the technical field of centrifugal pump analog measurement systems, in particular to a measurement system for static and dynamic characteristics of fluid in a high-speed seal. Background technique [0002] The excitation of high-speed circulating fluid in the sealing gap inside the centrifugal pump can easily induce the flow-induced vibration of the rotor, which will increase the vibration of the rotor in the centrifugal pump. The spiral seal sleeve is the key component to control the leakage of the centrifugal pump, and it has great influence on the efficiency of the centrifugal pump and the vibration of the rotor. Important significance, excessive leakage can even seriously affect the operation of the centrifugal pump, leading to major accidents. In addition, when the centrifugal pump is working, under the action of radial excitation, such as unbalanced excitation, the high-speed self-rotating rotor has radial vortex motion, ...

AI Technical Summary

Problems solved by technology

There is no experimental platform for the static and dynamic characteristics of the screw seal in the centrifugal pump, so that the working conditions of various screw seals in the pump cannot be measured experimentally, which is the main reason why the theory and engineering practice cannot be combined

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