Luoyang Ming Electrical Engineering developed a new aircraft engine bearing test machine

Abstract high-tech enterprise by the state Luoyang Ming Electrical Equipment Engineering Co., Ltd. and Xi'an Jiaotong University jointly complete aircraft engine bearings cyclical dynamic loading test machine project, July 28, 2013 passed by the China Bearing Industry Association, Northwestern Polytechnical University. ...
    Work by the National High-tech enterprises in Luoyang Ming Electrical Equipment Co., Ltd. and Xi'an Jiaotong University to complete aircraft engine angular contact ball bearing cyclical dynamic loading test machine project, July 28, 2013 passed by the China Bearing Industry Association, Northwestern Polytechnical University, Henan University of Technology Henan Key Laboratory of Mechanical Design and Transmission, AVIC Shenyang Aeroengine Research Institute, Luoyang Bearing Research Institute and other research institutes, experts and professors of the appraisal committee for scientific and technological achievements appraisal, which indicates that China has independently developed the Air engine bearings cyclical dynamic loading test machine brands.
    Aero-engine technology has been the mainstream of the world's military powers priority development, degree of monopoly and long tight blockade of key technologies, is a measure of a country's level of military equipment, technology industrial strength even one important indicator of overall national strength.
    At present, our country because aero-engine technology is relatively backward, as a constraint to the development of the entire aviation industry "bottleneck", aircraft engines is listed as national key scientific and technological projects. The aero-engine bearings are one of the key components of aircraft engines, high-speed, high-temperature, force operating under complex conditions, the quality and performance directly affects engine performance, life and reliability, bearing failure have been grouped into eight aircraft engines faults. As the domestic high-speed bearing surface contact fatigue monographic study is relatively small, so that the poor quality of high-speed bearings, basically all imports. Therefore, the state development plan proposed new bearings, while Luoyang Ming Electrical Engineering, Xi'an Jiaotong University and the aero-engine bearings for dynamic loading test machine cyclical items and bearing damage propagation mechanism, fatigue life prediction, new bearings become a key development plan link.
    According to the project experts, China has independently developed the aero-engine bearing cyclical dynamic loading test machine, the performance test machine than similar foreign technical specifications must be high, mechanical design more reasonable, you can test each load when loading a variety of speeds, the bearing life and reliability testing and evaluation. Equipment to achieve the overall automatic control, measurement and advanced technology. Can wind turbine aeroengine bearings and bearings, high-speed rail bearings, rolling mill bearings, large bearings roller rpm and diameter (mm) of the product of 2,000,000 cyclical dynamic contact fatigue tests simulate actual bearing load spectrum, speed spectrum, temperature conditions, the data obtained by testing to improve the bearing design and manufacturing.
    1, advanced seismic structure of machine testing machine and test systems. Support bearings using split installation, testing load bearing cantilever elastic rotating, reasonable structure design, build aircraft engines bearing cyclical dynamic loading test machine, the machine has a good seismic performance. Its functions include automatic computer control of speed, load, temperature and time. Can be realized on the bearing temperature, vibration, motor current automatic monitoring, automatic save and print the experimental data.
    2, the use of large spindle realize bearing operating speed over twenty thousand rev / min spindle with a compact, light weight, small inertia, small vibration, low noise, fast response, high precision and high speed, high power simplify the structural design, easy to implement spindle positioning. Especially in high-power electric spindle applications on this device for aircraft engine testing machine spindle bearings innovation to a new era. Since the built-in spindle motor direct drive, eliminating the need for belts, gears, couplings and other intermediate gear and drive means having a simple and compact structure, high efficiency, low noise, small vibration and high accuracy. And the use of AC variable frequency technology, electric spindle can be achieved within the rated speed CVT to accommodate a variety of working conditions and load changing needs.
    3, according to the theory of tribology and virtual testing to establish the bearing life test theoretical mathematical models, computer vibration analysis test preparation software, vibration analysis and testing through computer software, using vibration spectrum resonance demodulation technology, roller bearings for diagnostic testing data .
    Bearing testing machine controlled by computer, in a certain condition (load certain) under test bearing when the maximum speed reached 30000r/pm, contact fatigue test bearing the extent of damage. Temperature, vibration, load and other parameters using temperature sensors, pressure sensors, acceleration sensors, the signals to be measured, the computer processing for display, print. The project is based on the indicators proposed bearing technology to achieve the bearing automatically detected. In the performance of detection and analysis device than similar foreign technical indicators must be high, mechanical design more reasonable test load greater test speed higher overall performance automatic control equipment, measurement and advanced technology.
    Expert appraisal committee that workers Ming Electrical Equipment Co., Ltd. Luoyang and Xi'an Jiaotong University to complete aircraft engine bearings cyclical dynamic loading test machine project:
    1, for large and small aircraft engine test requirements of different spindle bearings were developed bearing diameter of 15-30mm ,30-80mm ,80-180mm three test machines. Testing machine with spindle speed transmission, hydraulic loading serve to achieve a cyclical dynamic precision bearing load, using electromagnetic induction heating can effectively improve the rate of heating oil to meet the requirements of aircraft engine bearing test.
    2, developed a vibration spectrum detection device, the preparation of vibration demodulation analysis and control software, failure to establish a bearing life estimation model that can effectively detect bearing failure time.
    3, the user indicates that the project test machine stable and reliable operation, high precision control through a cylindrical roller bearing dn value 22 × 106 test assessment; The test machine has the technical innovation, leading the overall technical level, should further expand the application of the testing machine.