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Turbine disc cavity sealing efficiency testing method and device

A technology of turbine disk and detection method, which is applied in the direction of using liquid/vacuum for liquid tightness measurement, etc., can solve the problems of high-pressure gas waste and inability to recycle, and achieve the effect of avoiding waste and quickly collecting

Pending Publication Date: 2022-01-14
INST OF ENGINEERING THERMOPHYSICS - CHINESE ACAD OF SCI +1
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Problems solved by technology

[0004] The invention proposes a method and device for testing the sealing efficiency of the turbine disk cavity, in order to solve the problem that the sampled gas cannot be recycled after being discharged into the atmosphere in the existing measurement method, resulting in the waste of high-pressure gas, and proposes a sealing Method for Unsteady Measurement of Strict Efficiency

Method used

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  • Turbine disc cavity sealing efficiency testing method and device
  • Turbine disc cavity sealing efficiency testing method and device
  • Turbine disc cavity sealing efficiency testing method and device

Examples

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Embodiment 1

[0037] This embodiment provides a method for testing the sealing efficiency of the turbine disc cavity (see figure 1 ), including the following steps:

[0038] Step 1, set the sampling point:

[0039]1) Sampling point 1 is arranged at the sample point to be tested on the turbine guide vane blade, and a pipeline 1 is set at the sampling point to connect with the air inlet of the gas analyzer, and a control valve 3 is set on the pipeline 1;

[0040] 2) Arrange sampling point 2 at the sample point to be tested at the sealing gas inlet at the low radius, set pipeline 2 at the sampling point 2 to connect with the gas outlet of the gas analyzer, and set control valve 2 on the pipeline 2;

[0041] 3) Sampling point 3 is arranged in the main flow channel. Pipeline 3 is set at sampling point 3 to connect with the gas analyzer inlet. Control valve 1 is set on pipeline 3; branch pipeline 1 and pipeline 2 are set on pipeline 3. connection, branch pipeline 1 is provided with control valv...

Embodiment 2

[0050] This embodiment provides a device for detecting the sealing efficiency of the turbine disc cavity, such as image 3 As shown, a gas analyzer 1 is included, the gas inlet of the gas analyzer 1 is connected with a first branch pipeline 11 and a third branch pipeline 13, and the inlet of the first branch pipeline 11 is used as the first sampling point 1001, the inlet of the third branch pipeline 13 is used as the third sampling point 1003; the first branch pipeline 11 is provided with a third control valve 103, and the third branch pipeline 13 is provided with a first control valve Valve 101; the gas outlet of the gas analyzer 1 is provided with a second branch pipeline 12 and a fourth branch pipeline 14, the inlet of the second branch pipeline 12 is used as the second sampling point 1002, and the fourth branch pipeline 14 as the exhaust port 1004; wherein the second branch pipeline 12 is provided with a second control valve 102, and the fourth branch pipeline 14 is provid...

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Abstract

The invention discloses a turbine disc cavity sealing efficiency testing method and device. The method comprises the steps of arranging a first sampling point at a to-be-tested sampling point on a turbine guide vane, arranging a second sampling point at a to-be-tested sampling point at a sealing gas inlet at a low radius, arranging a third sampling point in a main flow channel, meanwhile, connecting isomorphic and different pipelines of the first sampling point, the second sampling point and the third sampling point and branch pipelines with a gas analyzer, arranging control valves on the pipelines, controlling and measuring the gas concentration of all the sampling points through the control valves, and finally acquiring the sealing efficiency through calculation. The device comprises a plurality of sampling points and a device formed by connecting a gas analyzer through a pipeline and a control valve. The method can effectively solve the problem of high-pressure gas waste caused by the fact that the sampling gas cannot be recycled after being discharged into the atmosphere in the existing measurement method, and provides a method for unsteady measurement of the sealing efficiency.

Description

technical field [0001] The invention relates to the field of turbomachinery disk cavity sealing, in particular to the technical field of turbine disk cavity sealing efficiency testing. In particular, it relates to a method and a device for testing the sealing efficiency of a turbine disk cavity. Background technique [0002] Turbines are widely used in energy equipment fields such as gas turbines, aeroengines, and compressed air energy storage systems. Due to the existence of the rotor and stator systems, in order to prevent the two from colliding and friction, a certain gap is usually left between the rotor disc and the stator. For the cavity. Considering that the mainstream of the turbine is generally high-pressure or even high-temperature gas, in order to prevent the mainstream of the turbine from invading the disk cavity, sealing gas and sealing structure are often used to seal the disk cavity, thereby reducing the leakage of the mainstream gas and improving the efficie...

Claims

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Application Information

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IPC IPC(8): G01M3/02
CPCG01M3/02Y02E10/20
Inventor 陈海生尹钊张华良徐玉杰郑派
Owner INST OF ENGINEERING THERMOPHYSICS - CHINESE ACAD OF SCI
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