Digital calibration method and application of compressor variable stator vanes
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摘要:
为了提高可调静子叶片（variable stator vane，VSV）的角度精度，建立了压气机可调静子叶片数字化标定的流程和方法，主要步骤包括：角位移传感器标零，极限位置角度测量，连杆长度调节，极限位置角度校核，叶片角度与作动机构线位移调试以及全转速角度偏差校核等。搭建了VSV数字化标定的平台，规避了传统标定方法受人员操作，工装精度对标定结果的影响。试验结果表明：新的数字化标定方法精度控制在0.5°范围。可调静叶角度的精度提升提高了压气机匹配性能和压气机性能评定的精确性。
Abstract:In order to improve the angle precision of variable stator vane (VSV), the process and method of digital calibration for VSV were established. The main steps include: zero calibration of angular resolver, angle measurement of extreme position, length adjustment of connecting rod, angle checking of extreme position, vane’s angle and liner displacement of actuator, and angle checking of difference for all speeds. The platform system was also founded for VSV digital calibration. The method proposed avoided the impact from personal operation deviation and precision of calibration tool. The test results showed that, the new digital VSV calibration improved the angle precision at half degree. The improvement of angle precision promoted the matching performance of compressor and the accuracy of compressor performance evaluation.
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Key words:
- compressor /
- variable stator vane /
- digital /
- calibration /
- application
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图 6 角位移传感器标定台定位销孔示意图
Figure 6. Schematic diagram of the pin hole of angular resolver calibration platform
图 10 可调静子叶片角度周向分布示意图
Figure 10. Schematic diagram of the angle circumferential distribution for VSV
图 12 连杆长度测量示意图
Figure 12. Schematic diagram of the length measurement for connecting rod
图 13 作动筒（左）线位移与叶片角度关系图
Figure 13. Curve graph of the left actuator linear displacement and vane angle
图 14 作动筒（右）线位移与叶片角度关系图
Figure 14. Curve graph of the right actuator linear displacement and vane angle
图 15 采用数字化标定方法的VSV角度试验数据
Figure 15. VSV angle test data relate to digitized calibration method
图 16 中高转速减速过程VSV试验角度与目标值偏差对比
Figure 16. Angle difference comparison of test data and target in deceleration process at medium and high speeds
表 1 各级连杆长度值
Table 1. Length of the connecting rod
mm 叶片级 L参考值 L实测值（左） L实测值（右） 两侧实测值差异 与参考值最大差异 S0 95.30 95.32 95.34 0.02 0.04 S1 88.85 88.40 88.50 0.10 0.45 S2 89.73 89.74 89.74 0.00 0.01 S3 90.81 90.79 90.75 0.04 0.06 S4 89.64 89.30 89.31 0.01 0.34 
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表 2 偏心状态下同级叶片角度差异对比
Table 2. Different vane angle at eccentric state of the same stage
（°） 叶片位置 偏心状态 测点1 测点2 测点3 测点4 极差 平均值 差异 极限关 偏心大 13.70 18.27 19.27 15.54 5.57 16.70 0.09 偏心小 16.77 16.90 16.77 16.73 0.17 16.79 中间点 偏心大 −10.17 −6.12 −5.25 −8.63 4.92 −7.54 0.09 偏心小 −7.88 −7.46 −7.40 −7.79 0.48 −7.63 极限开 偏心大 −9.37 −4.98 −3.88 −7.40 5.49 −6.41 0.21 偏心小 −6.21 −6.21 −6.17 −6.21 0.04 −6.20
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表 3 作动筒活塞杆伸出量-叶片转角的对应关系目标值
Table 3. Target of relationship between the actuator piston rod displacement and vane angles
状态 位移参考值 S0摇臂角 S1摇臂角 S2摇臂角 S3摇臂角 S4摇臂角 1 1 1 1 1 1 1 2 0.993 1.000 0.984 0.983 0.977 0.978 3 0.979 0.998 0.948 0.943 0.926 0.928 4 0.957 0.994 0.895 0.886 0.848 0.858 5 0.921 0.981 0.811 0.793 0.727 0.745 6 0.870 0.950 0.689 0.662 0.557 0.588 7 0.790 0.871 0.504 0.465 0.306 0.364 8 0.676 0.699 0.249 0.202 −0.020 0.084 9 0.534 0.379 −0.074 −0.114 −0.386 −0.207 10 0.293 −0.254 −0.525 −0.508 −0.783 −0.458 11 0.188 −0.592 −0.711 −0.647 −0.892 −0.490 12 0.121 −0.825 −0.821 −0.721 −0.935 −0.481 13 0.064 −1.039 −0.909 −0.773 −0.956 −0.454 14 0.041 −1.130 −0.942 −0.791 −0.959 −0.438
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