In order to test the output performance and input-output mapping relationship of centimeter-scale variable nozzle two-stage axial flow micro-turbine air motor, and reveal the flow loss mechanism and energy conversion efficiency under design conditions, the calculation formula for output torque and power of two-stage axial flow turbine air motor was established under adiabatic isentropic condition, and the quantitative relationship between input state parameters and output torque and power was obtained. The special microturbine motor testing device can collect physical quantities such as inlet pressure, flow rate, temperature, speed and torque and realize the conversion output. The quantitative relationship between air supply pressure, nozzle inlet pressure and volume flow rate is obtained. When the absolute inlet pressure of the nozzle is 300 kPa and 224 kPa, the output power and torque of the two-stage axial flow turbine motor are tested. It is found that the maximum efficiency is achieved when the inlet pressure is 300 kPa and the velocity coefficient is 0.22, and the output efficiency and output power are 56% and 78 W, respectively. The comparison of theoretical calculation and experimental results shows that the test device can better test the output characteristics of the micro-turbine motor, and provides experimental conditions for the subsequent comprehensive performance test of the centimeter-level microturbine motor.
XUY H, WANGX, ZAHNGJ, et al. Experimental investigation and artificial neural network prediction of small-scale compressed air energy storage system based on pneumatic motor[J]. Thermal Science and Engineering Progress, 2024, 47: 102287.
[2]
KHAGHANIA, CHENGK. CFD-based design and analysis of air-bearing-supported paint spray spindle[J]. Nanotechnology and Precision Engineering, 2018, 1(4): 226-235.
[3]
GUANY, WANGX, ZHUY L, et al. Optimal design and research for nozzle governing turbine of compressed air energy storage system[J]. Journal of Energy Storge, 2024, 77: 109683.
[4]
CAOR F, LIW Q, CONGX W, et al. Energy, exergy and economic (3E) analysis and multi-objective optimization of a combined cycle power system integrating compressed air energy storage and high-temperature thermal energy storage[J]. Applied Thermal Engineering, 2024, 238: 122077.
[5]
SPENSA, BONSJ P. Active fluidic control of a nozzle guide vane throat[J]. Journal of Turbomachinery, 2024(1): 011004.
[6]
CHENW, QINH X, ZHUQ, et al. Optimal design and performance assessment of a proposed constant power operation mode for the constant volume discharging process of advanced adiabatic compressed air energy storage[J]. Renewable Energy, 2024, 221: 119728.
[7]
SHANX C, ZHANGQ D, SUNY F, et al. Design, fabrication and characterization of an air-driven micro turbine device[J]. Journal of Physics: Conference Series, 2006, 34: 316.
[8]
LIW, LIUM J, RENY H, et al. A high-speed precision micro-spindle use for mechanical micro-machining[J]. The International Journal of Advanced Manufacturing Technology, 2019, 102(9): 3197-3211.
[9]
ZHANGG H, EHMANNK F. Dynamic design methodology of high speed micro-spindles for micro/meso-scale machine tools[J]. The International Journal of Advanced Manufacturing Technology, 2015, 76(1): 229-246.
[10]
MÜLLERC, KIRSCHB, AURICHJ C. Compact air bearing spindles for desktop sized machine tools[M]//WULFSBERG J, SANDERS A. Small Machine Tools for Small Workpieces. Cham: Springer International Publishing, 2017: 21-34.
[11]
MÜLLERC, REICHENBACHI G, AURICHJ C. Design and numerical simulation of an air turbine for a high frequency tool spindle[C]//9th International Conference on MicroManufacturing. Singapore: International Institution of Micro Manufacturing, 2014: 30.
[12]
JURAEVAM, SONGD J, KANGD J. Optimum design of the dental air-turbine handpiece system using the design of experiment method[J]. International Journal of Precision Engineering and Manufacturing, 2020, 21: 265-272.
[13]
HARRISP, WINTTERERM, JASPERD, et al. Design and development of a high efficiency air turbine spindle for small-part machining[J]. International Journal of Precision Engineering and Manufacturing-Green Technology, 2020, 7(5): 915-928.
[14]
HARRISP, LINKEB, SPENCES. A numerical investigation of a miniature pneumatic spindle turbine[C]//BATH/ASME 2016 Symposium on Fluid Power and Motion Control. Bath, UK: ASME, 2016: V001T01A027.
[15]
ADELMANNB, HELLMANNR. Function integration in additive manufacturing: design and realization of an LPBF built compressed air motor[J]. Materials, 2022, 15(19): 6632.
[16]
LIUJ, GUOZ P, MIAOS J. Research on aerodynamic characteristics of two-stage axial micro air turbine spindle for small parts machining[J]. Advances in Mechanical Engineering, 2020, 12(12): 1-12.