A gas turbine axial force control device and control method thereof

A gas turbine and control device technology, which is applied to gas turbine devices, jet propulsion devices, mechanical equipment, etc., can solve the problems of high pressure value, reduced life of control valve, gas leakage, etc., and achieves simple method, guarantees smoothness, and meets high automation. Effect

Active Publication Date: 2019-10-01
BEIJING HUAQING GAS TURBINE & INTEGRATED GASIFICATION COMBINED CYCLE ENG TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The technical problem to be solved by the present invention is to provide a gas turbine axial force control device and its control method, which can not only effectively control the gas turbine axial force, but also effectively reduce the unloading regulating valve that the gas extraction disturbs the operation of the gas turbine, and solve the problem of regulating valve If the final pressure value is too high, gas leakage will occur, and the life of the regulating valve will be reduced.

Method used

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  • A gas turbine axial force control device and control method thereof
  • A gas turbine axial force control device and control method thereof
  • A gas turbine axial force control device and control method thereof

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Embodiment 1

[0039] A gas turbine axial force control device provided by an embodiment of the present invention, such as figure 1 As shown, a thrust bearing 6 is arranged in the bearing assembly, and the thrust bearing 6 includes an auxiliary thrust bearing 1 and a main thrust bearing 2. When a gas turbine exceeds about 70% of the rated load in winter, the main thrust bearing 2 in the thrust bearing 6 The bearing axial thrust will exceed its design axial thrust value of 17.7×10 4 N, at this time, the unloading regulating valve 5 needs to be opened, and the compressor pumping air is introduced into the unloading chamber to control the pressure of the main thrust bearing 2 in the thrust bearing 6 within its rated range.

[0040] The control device includes a pressure sensor arranged on the thrust bearing 6, such as figure 2 As shown, the thrust bearing 6 includes a thrust disc 11, a thrust pad 12, a support disc 13, an equalizer plate 14 and a seat ring 15, wherein the thrust pad 12 is in ...

Embodiment 2

[0046]A control method of a gas turbine axial force control device provided in an embodiment of the present invention includes the following steps:

[0047] S1. The pressure sensor detects the pressure measurement value according to the force of the thrust bearing;

[0048] S2. In order to improve the accuracy of the measured pressure, the pressure measurement value is transmitted to the optimization module, and the optimal pressure value is selected by the optimization module; wherein, the optimization module is realized by software. Four axial force pressure sensors are installed on the main thrust bearing 2 side, and the pressure value is selected through the optimal scheme. The controller has a programming function, and the optimization module is realized by programming, that is, software. The simpler optimization method is: calculate the square of the difference between each pressure value and the other three pressure values ​​one by one and add them up, and select the sm...

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Abstract

The invention relates to an axial force control device for a combustion gas turbine. The axial force control device comprises a pressure sensor, wherein the pressure sensor is arranged on a thrust bearing; a pressure value detected by the pressure sensor is used as a controlled parameter and is transmitted to a controller and an unloading adjustment valve is controlled by the pressure sensor. The control method of the axial force control device comprises the following steps that the pressure value obtained by the thrust bearing pressure sensor is fed to an optimizing module, and the optimal pressure value is selected out; the optimal pressure value is compared with a predetermined threshold value, an adjustment direction of the adjustment valve is determined based on a comparison result and an opening value is adjusted; an opening instruction is output, and the opening size of the valve is changed by a valve execution mechanism according to the opening instruction. According to the control device and the control method, the axial force of the combustion gas turbine can be effectively controlled, the disturbance on the operation of the combustion gas turbine by air extraction can be effectively reduced, and the problems that the leakage of the gas is produced because the adjustment downstream pressure value is over-high and the service life of the adjustment valve is shortened are solved.

Description

technical field [0001] The invention relates to the technical field of gas turbine control technology, in particular to a gas turbine axial force control device and a control method thereof. Background technique [0002] The gas turbine bearing assembly is provided with a thrust bearing, and the function of the thrust bearing is to bear the thrust load formed when the gas turbine rotates. During the normal operation of the gas turbine, the thrust load of the rotor assembly is unidirectional, however, during startup and shutdown, the direction of the thrust load is usually opposite to it, therefore, in order to bear the thrust load from two directions, the thrust bearing includes the main thrust Bearings and auxiliary thrust bearings, the main thrust bearing bears the thrust during normal operation, and the auxiliary thrust bearing bears the thrust during startup and shutdown. The main thrust bearing and the auxiliary thrust bearing are provided with pressure sensors for det...

Claims

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Application Information

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IPC IPC(8): F02C9/18
Inventor 梁友
Owner BEIJING HUAQING GAS TURBINE & INTEGRATED GASIFICATION COMBINED CYCLE ENG TECH
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