A water erosion test and measurement and control system

Abstract

The invention discloses a water erosion testing, measuring and controlling system. A high-speed jet is adjusted to impact test pieces to drive the system to rotate, so as to simulate a real blade erosion environment, so that the safe and reliable test performance is guaranteed; high-pressure jet water is utilized for impacting the symmetric test pieces by symmetric nozzles to drive a rotor to rotate at a high speed to produce tangential symmetric jet flow, so that the unbalanced force of the rotor is effectively reduced; a load is connected with the rotor through a flexible coupling and can be used for controlling the output power and rotation speed of the rotor; two ends of the rotor at a test section are sealed by water, so that the suction pressure of a vacuum pump is reduced; bearings at two ends of the rotor are lubricated by virtue of an air bag oil station, so that the bearings can be lubricated until the rotor stops when power is off; an auxiliary nozzle is arranged in an air cylinder and is used for rapidly braking, so that the galloping is avoided; and a flow guide plate is arranged in the air cylinder, so that the rebounding of jet flow after the jet flow collides with walls is prevented. The water erosion testing, measuring and controlling system can be used for monitoring and regulating key parameters. According to the water erosion testing, measuring and controlling system, the test building cost can be greatly lowered, and meanwhile, the manual dependency can be effectively reduced. The water erosion testing, measuring and controlling system has wide application prospects.

Description

Technical field: [0001] The invention relates to a material water erosion test device, in particular to a water erosion test and measurement and control system. Background technique: [0002] In the low-pressure cylinder of thermal power steam turbines and most of the turbine stages starting from the first stage of nuclear power steam turbines work in the wet steam area. Under the erosion of water droplets, the rotor blades are prone to deformation and fatigue cracks, which eventually lead to the loss of blade surface materials. A large number of shedding, corrosion marks and honeycomb pits, especially the severe erosion of the final cascade may cause the blade to break, causing a serious accident that destroys the entire unit, causing serious accidents to production safety and economy. After investigation and analysis, the blade cascade of large power units above 200MW generally has the problem of blade water erosion, which seriously affects the strength and life of the bla...

AI Technical Summary

Problems solved by technology

The water erosion test device described in ZL201110071624.9 is constrained by the construction cost and test cost, the axial pulse force cannot be offset, and the artificial dependence is large, which has obvious limitations for long-term continuous erosion tests.

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