SU979942A1 - Stand for testing gas turbine engine hydraulic speed regulator - Google Patents

Description

(54) STAND FOR TESTING A HYDRAULIC REGULATOR OF GAS TURBINE ENGINE COVERS

one

The invention relates to the testing of regulators of gas turbine engines.

A stand for testing a hydraulic regulator of revolutions of a gas turbine engine is known, comprising pressure and flow sensors for a controlled regulator associated with a computational fluid; by means of an electric drive and with a gas pressure simulator, as well as an adder connected by one input to the pressure sensor 1.

However, the stand does not provide the required range of tests.

The aim of the invention is to expand the range of tests.

This goal is achieved by the fact that stand 5 additionally contains an analog-code converter, a second electric drive, a progressively connected random number generator, a code-analog converter, an amplifier, an integrator, a non-linear unit, an analog-frequency converter 20, and a comparison unit associated with the flow sensor connected to the computing unit, the latter being connected to a gas pressure simulator, a random number generator, an analog-code converter, and to a second electric drive connected with the test circuit. Str torus, and the second input of the adder and its output connected respectively to the output of the amplifier and the input of the converter analog code.

The drawing shows the block diagram of the stand.

Claims (1)

The test bench for testing the hydraulic regulator 1 revolutions of the gas turbine engine includes a pressure sensor 2 and a sensor 3 for the working fluid flow rate of the regulator connected to the computing unit 4 by means of the electric drive 5 and the gas pressure simulator 6, as well as the converter 8 analog-code , a second electric drive 9 and a series-connected random number generator 10, a converter And a code analog, a driver 12, an integrator 13, a nonlinear block 14, a converter 15 analog-frequency, and a block 16 of comparison. In addition, the drawing shows a tandem 17, a spring 18, centrifugal weights 19, a metering needle 20 and a regulator hydraulic booster 21, a controlled throttle 22, a compressor. 23, a membrane cavity 24, a spool 25 and a simulator hydraulic booster 26, profiled cams 27, 28 and a pump 29. The stand operates as follows. Computing unit 4 implements the control of gas pressure simulator 6, in accordance with engine models of control bodies and external influences. changes the speed of the hydraulic regulator I by applying signals to the electric drive 5 and changes the position. the tiger 17, balanced by the force of the spring 18 and the action of the centrifugal weights 19, by rotating the profiled cam 27 and 28 by the electric actuator 9 and the hydraulic booster 26. The hydraulic booster 26 processes the movements of the spool 25 depending on the air pressure in the membrane cavity 24, is injected by my compressor 23 and is set The controlled throttle 22. The position of the tip 17 determines the position of the metering needle 20 connected to the hydraulic booster 21. As the metering needle moves, the pressure and flow rate of the working fluid change , on the pumped-up pump 29, measured respectively by the pressure sensor 2 and the flow sensor 3. The signals from the pressure sensor 2 are fed to the adder 7, to another input of which the signals go through the converter. 11 code analogue and amplifier 12 from 10 random number generator, controlled by computing unit 4. The error signal is output from the adder 7 through the converter 8 analog-code to the computing unit and worked until the effect of the computing unit on the display 17 disappears. Signals received from the flow sensor 3 are fed to a comparison unit 16, where they are compared with signals from a random generator. the numbers coming from the output of amplifier 12 through integrator 13, nonlinear block 14 and converter 15 analog-code, simulating hydraulic booster 21 and nonlinear characteristic of metering needle 20. The difference signal converted to code from the output of comparison block 16 goes to the computing unit and is used to control the position tutor Computing unit 4 generates, using the generator 10, a sequence of random numbers distributed according to a given 9 4 law to simulate interference of measurement circuits containing pressure and flow sensors, as well as a sequence of reference signals worked out by the electric drive 5, the second electric drive 9 and the simulator 6 gases that make corrections for air temperature and pressure downstream of the compressor. In the process of testing, the input and output parameters are fixed, which make it possible to obtain a family of controller characteristics. Thus, the introduction of an analog-code converter, a second electric drive, a series-connected random number generator, a code-analog converter, an amplifier, an integrator, a nonlinear block, an analog-frequency converter and a comparison block into the bench allowed us to extend the range of tests for. by introducing correction for air temperature and pressure downstream of the compressor and simulating measurement circuit errors. Invention Stand for testing a hydraulic regulator of revolutions of a gas turbine engine, comprising pressure and flow sensors of a test regulator connected to a computing unit by means of an electric drive and a pressure simulator, gases, as well as an adder connected by one input to a pressure sensor, characterized by that, in order to extend the range of tests, it additionally contains an analog-code converter, a second electric drive, series-connected random generator Ate, code-to-analog converter, amplifier, integrator, nonlinear block, analog-frequency converter and comparison block associated with a flow sensor and connected to an output of a computing unit, the latter connected to a gas pressure simulator, generator) for random numbers, an analog converter - the code and to the second electric drive connected by Q by the tested regulator, and the second input of the adder and its output are connected respectively to the output of the amplifier and the input of the analog-code converter. , Sources of information taken into account in the examination 1. USSR author's certificate №578773, cl. G 01 M 15/00, 1976. R Ljj3j - & 15 2S J