A high-parameter turbomachinery airflow excitation test measuring device and method

Abstract

The invention discloses a high-parameter turbine mechanical airflow excitation test measuring device and method. The device comprises a rotor power system, a single stage turbine test system and a signal measuring system, the single stage turbine test system comprises an inner wall and an outer wall arranged from the inside to the outside and end walls arranged at two ends of the inner wall and the outer wall, two air inlets are uniformly arranged in the circumferential direction of one end of the outer wall, the end wall connected with the other end of the outer wall is provided with an air outlet, a voltage-stabilizing chamber, an air-inlet segment cavity, an excitation cavity, and an exhaust segment cavity are formed in sequence between the air inlets and the air outlet and the inner wall and the outer wall, the excitation cavity is provided with a replaceable sealing segment, an outer wall of the excitation cavity is provided with a vibration exciter, the rotor power system is connected with a rotor and provides power for the rotor, the signal measuring system comprises multiple groups of sensors, and signals of the sensors are connected to a multichannel data collector throughwires. The device and method can be used for research of an airflow excitation rule in different conditions, and reliable basis is provided for prevention of the airflow excitation problem in a high-parameter turbine in production practice.

Description

technical field [0001] The invention relates to a high-parameter turbomachinery airflow excitation test measuring device and method, which are used for simulating and measuring the airflow excitation phenomenon in the turbomachinery. Background technique [0002] In recent years, turbomachinery is gradually developing towards high parameters, which increases the airflow parameters inside the turbomachinery, which in turn causes the problem of airflow excitation, which seriously affects the stability and safe operation of the rotor system. Therefore, it is of great significance for the design and safe operation of high-parameter turbines to design an airflow excitation test device and study the characteristics of airflow excitation and the law of rotor dynamics under excitation. [0003] Most of the existing airflow excitation test benches are sealed excitation test benches. The main measurement section of the test bench is the internal flow channel of the sealed chamber, whi...

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Problems solved by technology

[0003] Most of the existing airflow excitation test benches are sealed excitation test benches. The main measurement section of the test bench is the internal flow channel of the sealed chamber, which does not include the blade flow channel. Therefore, only the excitation caused by the air flow in the sealed chamber can be considered in the measurement. However, it is impossible to measure the excitation effect caused by the airflow near the tip of the blade, that is, the airflow excitation in the tip clearance, so it is difficult to make a comprehensive and accurate assessment of the airflow excitation inside the turbomachinery

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