Journal Bearings in Wind Turbine Gearboxes

Journal Bearings In Wind Turbine Gearboxes-Free PDF

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R D Journal Bearings, Activities in 2015 2016 further investigations for reliability. Single Blade Installation,Installation high torque very low speed. Wear Behavior CuSn12Ni2 GZ,RNT measurement,Performance of different Lubricants. Load capacity and friction behavior used field oil. Field Performance JB gbx,4 years of operation facts. Prototype Testing 8MW gbx, Noise and vibration behavior roller vs journal bearings.
Real Life Experiences,Status and forecast cumulative field experiences. What next anonymised illustration, Siemens AG 2017 All Rights Reserved Page 2 March 17. Target Motivation and Approach,R D Journal Bearings activities in 2015 2106. Motivation Target Setting Load capacity different,Single blade installation. lubricants,secure safe introduction of new,technology.
fulfill new requirements,investigation of special operation. non operation modes,investigation on single blade,installation high torque very RNT wear behavior. low speeds Fretting false brinelling,bronze CuSn12Ni2 GZ. load capacity and friction behavior,for different lubricants Stribeck. fretting during transportation,stand still,investigation of the low wear.
behavior by RNT measurement,become fretting an issue during. transportation installation or standstill, Siemens AG 2017 All Rights Reserved Page 3 March 17. R D Investigation Single Blade Installation,Friction Temperature Behavior during Installation. swing time 4 minutes 20 MPa break time 5 minutes 0 8 MPa. Motivation Target Setting,fulfill customer specification. need for installation of huge rotor blades,system risk assessment time min.
swing cycles, permanent contact of the functional surfaces during test. procedure worse case, Test Features SBI break time no standstill of the shaft dynamic rotation worse. friction torque and temperature, friction increase during swing cycle and increase of friction torque. during procedure 100 up to 140, test performance no significant temperature increase during swing cycle delta 0 5 K. run in bearing for several hours 12 MPa, SBI test procedure with no additional oil Conclusion.
supply only wet surfaces, no scuffing and no wear detectable during test procedure 8 cycles. initial lubricated bearing test,low failure risk during SBI 2 swing cycles. specific load 20 MPa v 0 00134 m s, swing cycles 10 scuffing wear may occur to dry contact pattern. Siemens AG 2017 All Rights Reserved Page 4 March 17. R D Investigation Wear Behavior Characteristics,RNT Radionuclide Technology Wear Measurement. Motivation Target Setting,abrasive wear is very low.
emergency stop,geometrical wear measurement not, need for a high measurement accuracy initial loading. wear life time calculation required first repeat loading. Test Features RNT,spectrometer,oil circuit,normal operation. area LSS bearing, Test performance wear rate scale nm km sliding distance. radio activation of the Cu in alloy, normal operation no wear wear seen for high loads and low speeds. counting the gamma radiation of the wear, particles with high resolution repeat operation yellow bars with less wear as before blue bars.
resolution limit 0 1 g h,Conclusion,Mobil Gear SHC XMP 320. no filtration closed oil circuit approx cumulative wear over 20 years of operation less than 4 8 m. almost no wear no influence on cleanness and geometry. Siemens AG 2017 All Rights Reserved Page 5 March 17. R D Investigation Performance of different lubricants. Load Capacity and Friction Behavior,Motivation Target Setting Mobil Gear SHC XMP 320. high load friction, different lubricants are released transition speed run in behavior. investigation of all lubricants, are there any differences in load Mobil Gear XMP 320 WT. capacity and friction behavior friction high load friction. transition speed run in behavior,Test Features RNT Castrol Synthetic X320.
friction high load friction,transition speed run in behavior. Castrol Synthetic X320 WTO,friction high load friction. transition speed run in behavior,friction torque and temperature. differences in friction and temperature levels determined on high. load levels no differences below 20 MPa,Test performance. run in behavior and transition speed equal for all brands. perform comparable Stribeck curves,different load levels 10 MPa 55 MPa.
Conclusion,friction torque measured during operation. 4 different lubricants,all lubricants with a high load capacity. 3 years old field oil including particles Castrol brands slightly better than Mobil brands in load capacity. transition speed differences seen on high loads p 40 MPa. Siemens AG 2017 All Rights Reserved Page 6 March 17. R D Investigation Performance of different lubricants. Load Capacity and Friction Behavior used field oil. Motivation Target Setting,different lubricants are released. investigation of all lubricants,are there any differences in load. capacity and friction behavior,friction torque,Test Features RNT used field oil 3 years.
differences transition speed min friction,higher friction 45 55 MPa. friction torque and temperature, slightly increase of friction by using used oil only high loads 40 MPa. Test performance no differences in temperature levels. perform comparable Stribeck curves, different load levels 10 MPa 55 MPa Conclusion used field oil. friction torque measured during operation better run in behavior polishing effects. 4 different lubricants slightly wear 2 m on bearings 55 MPa with an increase of. 3 years old field oil including particles surface roughness not relevant for field operation p 20 MPa. oil cleanness acc DIN ISO 4406 16 14 10 minimum of friction differences seen on high loads p 40 MPa. Siemens AG 2017 All Rights Reserved Page 7 March 17. Field Prototype Performance of the first Winergy gbx. 4 Years of Operation set up,Motivation Target Setting Prototype Features. After successful in house test performance PEAJ 4435 2 Vestas V90 2 MW Turbine. gain field experience with all relevant one planetary stage two helical stages. bearings planetary wheel helical stage excluding carrier bearings. generate lessons learned items for next all bearings are journal bearings. prototypes and pilot lots bronze tin and aluminum tin alloys used. specific load radial bearings 11 5 21 MPa,specific load thrust bearings 1 5 2 MPa.
In House Test Performing,Gearbox shows good behavior on turbine. Better noise behavior,Temperatures of bearings constant at rated power. Turbine inspections without any issues,Oil samples without any wear particles. Original OSS can be used,No higher oil demand needed. Original cooling capacity of turbine sufficient,Design based on serial design plug play.
for serial OEM turbines, Siemens AG 2017 All Rights Reserved Page 8 March 17. Prototype Testing Performance of Journal Bearings,Noise and vibration behavior 8MW gearbox. Test Configuration,Test performance,back to back test arrangement. roller vs journal bearing gbx 1 2,roller bearing gbx. 14 MW gbx test bench,Test Features,Vibration measurement scan.
triax accelerator sensors used,different sensor position journal bearing gbx. Conclusion,better vibration behavior for JB gbx,expected on higher MOFT. Siemens AG 2017 All Rights Reserved Page 9 March 17. Prototype Testing Performance of Journal Bearings,Noise and vibration behavior 8MW gearbox. Test Configuration,roller bearing gbx,Test performance. back to back test arrangement,roller vs journal bearing gbx.
14 MW gbx test bench roller bearing gbx,journal bearing gbx. Test Features,Noise measurement,acc DIN ISO 9614 2 spot. journal bearing gbx,Conclusion,better noise behavior on JB gbx expected design. after vibration scan range,rated power JB gbx noise value 3 dB A. Siemens AG 2017 All Rights Reserved Page 10 March 17. Real Life Experiences Status and Forecast,Field Validation.
Summery turbine prototypes and, special operation modes and non operation modes of a wind turbine are uncritical. bearing loads in the gbx are below critical levels 55 MPa. journal bearings decrease noise and vibration levels. readiness level for 0 series pilot lots achieved,extend prototype field validation. gaining for more statistical validation increase amount of field gearboxes. how to test and qualify journal bearings in wind turbine gearboxes. Siemens AG 2017 All Rights Reserved Page 11 March 17. Thank you for your Attention,Dr Ing Thomas Meyer,Manager New Bearing Technologies. Siemens AG,Mechanical Drives Wind,Am Industriepark 2. 46562 Voerde Germany,Phone 49 2871 92 1572,E Mail thomas mrts meyer siemens com.
Page 12 14 October,Siemens AG 2017 All Rights Reserved. Field Prototype Performance of the first Winergy gbx Gearbox shows good behavior on turbine Turbine inspections without any issues Oil samples without any wear particles Better noise behavior Temperatures of bearings constant at rated power Original cooling capacity of turbine sufficient No higher oil demand needed Original OSS can be used Design based on serial design plug amp play for

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