Apparatus for simulating airflow exciting-vibration in high-speed rotating machine and testing vibration

Abstract

This invention relates to an analogy and vibration measurement device of high-speed revolving mechanic air-current exciting, which is characterized by the following: a high-speed revolving mechanic air-current exciting analogy and vibration measurement device which comprises the following steps: its rotor supporting and fixing on the checking platform, the driving device activating the rotor revolving, an air-seal assembling liner in the cylinder, the air-seal elaborating on the rotor, the liner and air-seal on the rotor constituting a labyrinth air-seal; an entrance in the middle of the cylinder which injects pressure to the cylinder through the air-line device; Signal measurement device contains many groups of sensors, which fixed two sensors in the entrance, exit, and stator air-seal gear of the cylinder and the shaft bearing shelf separately; Fitting a sensor on the end of the driving generator shaft bearing shelf; the signal of the sensor connects the multi-route datum device through the wire.

Description

(1) Technical field [0001] The invention relates to a high-speed rotary machine airflow excitation simulation and vibration test device, which is used for simulating the airflow excitation phenomenon in the rotary machine and belongs to the technical field of power machinery. (2) Background technology [0002] The use of ultra-supercritical pressure is one of the important ways to improve the thermal efficiency of steam turbines. However, the improvement of the steam parameters of the steam turbine will lead to an increase in the density of the steam entering the high-pressure cylinder and an increase in the flow rate, and the sensitivity of the tangential force of the steam acting on the rotor to the dynamic and static gap, the sealing structure and the alignment between the rotor and the cylinder will increase, which will increase the effect The excitation force on the rotor makes the ultra-supercritical steam turbine more likely to generate steam flow excitation than the ...

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Problems solved by technology

In addition, the rotor vibration measurement in previous airflow excitation experiments can only measure the vibration of the shaft outside the air seal teeth. Since the distance between the air seal teeth is only a few millimeters, and the general displacement sensor has a large structural size, the internal air seal The vibration of the rotating shaft cannot be measured, so it is impossible to experimentally study the coupling relationship between the flow field inside the air seal and the vibration of the rotor. However, this is the key to the fluid-solid coupling problem of the airflow excitation

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