A compressor adjustable guide vane automatic calibration device and calibration method

Abstract

A compressor adjustable guide vane automatic calibration device, a display and a chassis are arranged in front of the control cabinet, a wiring board, a servo amplifier, a DC signal amplifier, and a DC power supply are arranged inside the control cabinet; a mouse and a keyboard are connected to the chassis; an aviation socket is arranged on the side of the control cabinet, and a rotary encoder is connected to a positioning tool. A calibration method for a compressor adjustable guide vane automatic calibration device, a compressor adjustable guide vane automatic calibration test, completes the lowering stroke or raising stroke of the actuator cylinder during the movement from full extension to full retraction, measures the actuator cylinder displacement sensor LVDT signal feedback value and the guide vane angle at each calibration point, and calculates the hysteresis loop, and needs to measure multiple points and draw a curve to obtain the hysteresis loop. The advantages of the present invention: the use of a rotary encoder improves detection accuracy; the automatic angle reading reduces manual measurement errors; and the automatic calibration by computer reduces manpower and improves work efficiency.

Description

Technical Field

[0001] The invention relates to the field of adjustable guide vanes of aircraft engines, and in particular to an automatic calibration device and a calibration method for adjustable guide vanes of a compressor. Background Art

[0002] The compressor guide vane adjustment mechanism calibration test is a key test after the adjustable guide vane is assembled. The purpose is to check whether the output signal of the actuator linear displacement sensor LVDT and the maximum hysteresis loop are within the specified range when the guide vane rotation angle corresponds to the dial, so as to determine whether the product is qualified.

[0003] In the past, calibration equipment mostly used manual pressure control to move the actuator to rotate the guide vane. When the dial pointer indicated the angle to be calibrated, i.e. the guide vane angle, the operator manually read the angle data, and the data acquisition system collected the output signal of the position sensor, calculated the feedback value through the formula, and then compared it with the standard value to determine whether the feedback signal was qualified. Manual reading of data had large errors and required cooperation with the pressure personnel. During the test, the test was often repeated due to improper cooperation. Summary of the invention

[0004] The purpose of the present invention is to overcome the above problems and to provide an automatic calibration device and a calibration method for adjustable guide vanes of a compressor.

[0005] The present invention provides an automatic calibration device for adjustable guide vanes of a compressor, which is characterized in that: the automatic calibration device for adjustable guide vanes of a compressor comprises a control cabinet 1, a display 2, a chassis 3, a wiring board 4, a servo amplifier 5, a DC signal amplifier 6, a DC power supply 7, a mouse 8, a keyboard 9, an aviation socket 10, a rotary encoder 11, and a positioning tool 12;

[0006] Among them: a display 2 and a chassis 3 are arranged in front of the control cabinet 1, and a wiring board 4, a servo amplifier 5, a DC signal amplifier 6, and a DC power supply 7 are arranged inside the control cabinet 1; a mouse 8 and a keyboard 9 are connected to the chassis 3; an aviation socket 10 is arranged on the side of the control cabinet 1, and a rotary encoder 11 is connected to a positioning tooling 12.

[0007] A calibration method for an automatic calibration device for an adjustable guide vane of a compressor, characterized in that: the automatic calibration test for the adjustable guide vane of the compressor mainly completes the descending stroke of the actuator cylinder during the movement from full extension to full retraction or the ascending stroke of the actuator cylinder during the movement from full retraction to full extension, and at each calibration point, measures the feedback value of the LVDT signal of the actuator cylinder displacement sensor and guide vane angle, and calculate the hysteresis; the hysteresis is the difference in guide vane angles corresponding to the same electrical signal acquisition value of the linear displacement sensor in the ascending and descending strokes; it is necessary to measure multiple points and draw a curve to obtain the hysteresis;

[0008] Use the data acquisition card to read the LVDT signal value of the linear displacement sensor and calculate the signal feedback value

[0009] Adopt high-precision rotary encoder to automatically read the angle value of the dial through data collection and calculate the guide vane angle;

[0010] By controlling the extension and retraction step of the actuator, the lift or lowering calibration point is automatically determined, and the signal feedback value and guide vane angle at this time are measured to provide data for calculating the hysteresis amount;

[0011] The software designs a spline interpolation algorithm to calculate the hysteresis value, which can more accurately calculate the maximum hysteresis value under the same LVDT.

[0012] Compressor adjustable guide vane calibration test steps:

[0013] The device hardware is connected, the data acquisition card analog input is connected to the actuator signal sensor, and the rotary encoder is installed on the dial fixture;

[0014] Use manual oil supply to move the actuator to the fully extended position, at which time the actuator setpoint is set to the maximum limit value;

[0015] The movement from full extension to full retraction is the down-stroke calibration, which is automatically performed. In each cycle, the actuator set value minus the step length is used as the new set value. After stabilization, the actuator linear displacement sensor LVDT signal feedback value and the guide vane angle are collected until the actuator moves to the fully retracted position, that is, the full-stroke calibration is completed;

[0016] The lift calibration is performed automatically from full retraction to full extension. In each cycle, the actuator set value plus the step length is used as the new set value. After stabilization, the actuator linear displacement sensor LVDT signal feedback value and the guide vane angle are collected until the actuator moves to the fully extended position, that is, the full lift calibration is completed;

[0017] Arrange the lifting stroke calibration data, use the interpolation algorithm to calculate the hysteresis and obtain the maximum hysteresis; the number of collected data points = (maximum limit value of the actuator - minimum limit value of the actuator) / step length. The smaller the step length, the more collection points, and the more accurate the hysteresis calculation.

[0018] The adjustable guide vane automatic calibration device realizes the full automation of the guide vane calibration test process and eliminates manual measurement errors. At the same time, the intelligent measurement software is designed to perform multi-point measurement of the entire stroke through automatic control, and the data acquisition automatically reads the angle value, so the measurement data is more accurate, and the computer automatically determines the test results.

[0019] Advantages of the present invention:

[0020] The automatic calibration device and method for adjustable guide vanes of a compressor described in the present invention use a rotary encoder to improve detection accuracy; automatically read angles to reduce manual measurement errors; and realize automatic calibration through a computer to reduce manpower and improve work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments:

[0022] Figure 1 Design the schematic diagram for the automatic calibration device of the adjustable guide vanes of the compressor;

[0023] Figure 2 Design schematics for calibration test software;

[0024] Figure 3 It is the main view of the structure;

[0025] Figure 4 This is a side view of the structure. DETAILED DESCRIPTION

[0026] Example 1

[0027] The present invention provides an automatic calibration device for adjustable guide vanes of a compressor, which is characterized in that: the automatic calibration device for adjustable guide vanes of a compressor comprises a control cabinet 1, a display 2, a chassis 3, a wiring board 4, a servo amplifier 5, a DC signal amplifier 6, a DC power supply 7, a mouse 8, a keyboard 9, an aviation socket 10, a rotary encoder 11, and a positioning tool 12;

[0028] Among them: a display 2 and a chassis 3 are arranged in front of the control cabinet 1, and a wiring board 4, a servo amplifier 5, a DC signal amplifier 6, and a DC power supply 7 are arranged inside the control cabinet 1; a mouse 8 and a keyboard 9 are connected to the chassis 3; an aviation socket 10 is arranged on the side of the control cabinet 1, and a rotary encoder 11 is connected to a positioning tooling 12.

[0029] A calibration method for an automatic calibration device for an adjustable guide vane of a compressor, characterized in that: the automatic calibration test for the adjustable guide vane of the compressor mainly completes the descending stroke of the actuator cylinder during the movement from full extension to full retraction or the ascending stroke of the actuator cylinder during the movement from full retraction to full extension, and at each calibration point, measures the feedback value of the LVDT signal of the actuator cylinder displacement sensor and guide vane angle, and calculate the hysteresis; the hysteresis is the difference in guide vane angles corresponding to the same electrical signal acquisition value of the linear displacement sensor in the ascending and descending strokes; it is necessary to measure multiple points and draw a curve to obtain the hysteresis;

[0030] Use the data acquisition card to read the LVDT signal value of the linear displacement sensor and calculate the signal feedback value

[0031] Adopt high-precision rotary encoder to automatically read the angle value of the dial through data collection and calculate the guide vane angle;

[0032] By controlling the extension and retraction step of the actuator, the lift or lowering calibration point is automatically determined, and the signal feedback value and guide vane angle at this time are measured to provide data for calculating the hysteresis amount;

[0033] The software designs a spline interpolation algorithm to calculate the hysteresis value, which can more accurately calculate the maximum hysteresis value under the same LVDT.

[0034] Compressor adjustable guide vane calibration test steps:

[0035] The device hardware is connected, the data acquisition card analog input is connected to the actuator signal sensor, and the rotary encoder is installed on the dial fixture;

[0036] Use manual oil supply to move the actuator to the fully extended position, at which time the actuator setpoint is set to the maximum limit value;

[0037] The movement from full extension to full retraction is the down-stroke calibration, which is automatically performed. In each cycle, the actuator set value minus the step length is used as the new set value. After stabilization, the actuator linear displacement sensor LVDT signal feedback value and the guide vane angle are collected until the actuator moves to the fully retracted position, that is, the full-stroke calibration is completed;

[0038] The lift calibration is performed automatically from full retraction to full extension. In each cycle, the actuator set value plus the step length is used as the new set value. After stabilization, the actuator linear displacement sensor LVDT signal feedback value and the guide vane angle are collected until the actuator moves to the fully extended position, that is, the full lift calibration is completed;

[0039] Arrange the lifting stroke calibration data, use the interpolation algorithm to calculate the hysteresis and obtain the maximum hysteresis; the number of collected data points = (maximum limit value of the actuator - minimum limit value of the actuator) / step length. The smaller the step length, the more collection points, and the more accurate the hysteresis calculation.

[0040] The adjustable guide vane automatic calibration device realizes the full automation of the guide vane calibration test process and eliminates manual measurement errors. At the same time, the intelligent measurement software is designed to perform multi-point measurement of the entire stroke through automatic control, and the data acquisition automatically reads the angle value, so the measurement data is more accurate, and the computer automatically determines the test results.

[0041] Matters not covered by the present invention are known technologies.

[0042] The above embodiments are only for illustrating the technical concept and features of the present invention, and their purpose is to enable people familiar with the technology to understand the content of the present invention and implement it accordingly, and they cannot be used to limit the protection scope of the present invention. Any equivalent changes or modifications made according to the spirit of the present invention should be included in the protection scope of the present invention.

Claims

1. A calibration method for an automatic calibration device for adjustable guide vanes of a compressor, characterized in that: The compressor adjustable guide vane automatic calibration device comprises a control cabinet (1), a display (2), a chassis (3), a wiring board (4), a servo amplifier (5), a DC signal amplifier (6), a DC power supply (7), a mouse (8), a keyboard (9), an aviation socket (10), a rotary encoder (11), and a positioning tool (12); Wherein: a display (2) and a chassis (3) are arranged in front of the control cabinet (1); a wiring board (4), a servo amplifier (5), a DC signal amplifier (6), and a DC power supply (7) are arranged inside the control cabinet (1); a mouse (8) and a keyboard (9) are connected to the chassis (3); an aviation socket (10) is arranged on the side of the control cabinet (1); a rotary encoder (11) is connected to a positioning tool (12), and the positioning tool (12) is used to connect to a test piece; The calibration method described: The automatic calibration test of the adjustable guide vane of the compressor mainly completes the descending stroke of the actuator from full extension to full retraction or the ascending stroke of the actuator from full retraction to full extension. At each calibration point, the LVDT signal feedback value of the actuator displacement sensor and the guide vane angle are measured, and the hysteresis is calculated; and the hysteresis is the difference in the guide vane angle corresponding to the same electrical signal acquisition value of the linear displacement sensor in the ascending and descending strokes; it is necessary to measure multiple points and draw a curve to obtain the hysteresis; Use a data acquisition card to read the LVDT signal value of the linear displacement sensor and calculate the signal feedback value; Adopt high-precision rotary encoder to automatically read the angle value of the dial through data collection and calculate the guide vane angle; By controlling the extension and retraction step of the actuator, the lift or lowering calibration point is automatically determined, and the signal feedback value and guide vane angle at this time are measured to provide data for calculating the hysteresis amount; The software designs a spline interpolation algorithm to calculate the hysteresis value, which can more accurately calculate the maximum hysteresis value under the same LVDT.

2. The calibration method of the automatic calibration device for adjustable guide vanes of a compressor according to claim 1, characterized in that: Compressor adjustable guide vane calibration test steps: The device hardware is connected, the data acquisition card analog input is connected to the actuator signal sensor, and the rotary encoder is installed on the dial fixture; Use manual oil supply to move the actuator to the fully extended position, at which time the actuator setpoint is set to the maximum limit value; The movement from full extension to full retraction is the down-stroke calibration, which is automatically performed. In each cycle, the actuator set value minus the step length is used as the new set value. After stabilization, the actuator linear displacement sensor LVDT signal feedback value and the guide vane angle are collected until the actuator moves to the fully retracted position, that is, the full-stroke calibration is completed; The lift calibration is performed automatically from full retraction to full extension. In each cycle, the actuator set value plus the step length is used as the new set value. After stabilization, the actuator linear displacement sensor LVDT signal feedback value and the guide vane angle are collected until the actuator moves to the fully extended position, that is, the full lift calibration is completed; Arrange the lifting stroke calibration data, use the interpolation algorithm to calculate the hysteresis and obtain the maximum hysteresis; the number of collected data points is equal to the maximum limit value of the actuator minus the minimum limit value of the actuator, and the result is divided by the step size. The smaller the step size, the more collection points, and the more accurate the hysteresis calculation.

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