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Experimental method of surge detecting device of gas compressor

A technology for detection devices and experimental methods, applied to measuring devices, vibration measurement in solids, and measurement of vibrations, etc., can solve the problem that the sinusoidal pressure generating device cannot meet the needs of the compressor surge detection device experiment

Inactive Publication Date: 2012-08-15
NORTHWESTERN POLYTECHNICAL UNIV
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AI Technical Summary

Problems solved by technology

The existing sinusoidal pressure generating device used for dynamic pressure sensor calibration cannot meet the needs of the compressor surge detection device experiment

Method used

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  • Experimental method of surge detecting device of gas compressor
  • Experimental method of surge detecting device of gas compressor
  • Experimental method of surge detecting device of gas compressor

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Experimental program
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Embodiment Construction

[0039] This embodiment is an experimental method of a compressor surge detection device. In this experimental method, the digital signal of compressor surge dynamic pressure obtained by experiment or numerical simulation is truly reproduced or realized as dynamic pressure through D / A board, displacement mechanism and cylinder, which can be used for the assessment of compressor surge detection device, testing or research. In the static state, the computer controls the pressure relief valve and the boost valve through the D / A board to adjust the pressure in the cylinder to the set value. When working, the dynamic pressure digital signal is converted into the displacement of the displacement mechanism according to the relationship derived from gas thermodynamics, and the displacement mechanism drives the piston to move in the cylinder, so that the gas volume in the cylinder changes, making its pressure a dynamic pressure digital signal the true reproduction or realization of . ...

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Abstract

The invention discloses an experimental method of a surge detecting device of a gas compressor. The experimental method comprises the following steps that: surge dynamic pressure digital signals are converted into analog signals by D / A (digital / analog); and a driving displacement mechanism drives a piston to move in a cylinder and generates pressure by change of the volume of gas in the cylinder, so that the pressure is real representation of dynamic pressure digital signals, and the surge detecting device of the gas compressor installed on the cylinder can be checked, inspected or studied. The experimental method disclosed by the invention has the advantages that the consistency of the experimental condition and the working condition of the surge detecting device is guaranteed, the dynamic pressure digital signals of surge of the gas compressor generated by numerical simulation are realized into real dynamic pressure, and the surge forcing experiment of the gas compressor can be avoided or reduced; the experimental method has the characteristics of flexible experimental parameter setting and easiness in adjustment; and the experimental method disclosed by the invention is easy in implementation, low in energy consumption, short in period and good in repeatability.

Description

technical field [0001] The invention relates to an experimental method for a compressor surge detection device, which belongs to the technical field of anti-surge of impeller machinery. Background technique [0002] Surge not only reduces the performance of turbomachinery, but also brings strong vibration, which causes structural damage and causes major accidents. Surge typically manifests as oscillations in flow and pressure. The pressure is easier to measure than the flow rate and is sensitive to the surge response. Therefore, the surge detection device usually uses the dynamic pressure of the compressor outlet as the input signal, and judges whether the compressor enters or will enter the surge state by extracting the dynamic pressure characteristics. The alarm signal sent by the surge detection device triggers the operation of the anti-surge system, so that the compressor is out of the surge and enters a stable working state. Therefore, the surge detection device plays...

Claims

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Application Information

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IPC IPC(8): G01H1/00
Inventor 李长征雷勇
Owner NORTHWESTERN POLYTECHNICAL UNIV
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