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Wind Turbines Slewing Bearing
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Product Details
| Place of Origin | Shandong, China | Brand Name | Titanhorse |
Product Description
Specifications
1. Self Owned Forging Ring Mill;2. Technical Cooperation with Germany Rothe Erde;
3. Supplier for Zoomlion, Kubota, Sany, etc
Wind Turbines Slewing Bearing contains, normally, the yaw bearing, blade bearing, transmission system bearing(spindle bearing and gearbox bearing). Currently HaoYang concerntrate on providing clients with the yaw bearing and blade bearing. The yaw bearing installed at the interconnnecting part of the tower and the cockpit, while balde bearing installed on the joint part between each blade root and the wheel hu. Every wind power generator has a set of yaw bearing and three blade bearings.
The service life of the wind driven generator is usually not less than 20 years, the maintenance cost is very high, this request the yaw bearing and the blade bearing of life cannot be less than twenty years. Considering the compex force situation, as well as the strong impact and vibration of the yaw bearing, blade ebaring, so the demands to bearing can withstand the impact, and can bear larger load, the mechanical properties of materials have very high requirements. We choose the material 42CrMo4v in making the ring, quenching and tempering adopting in heat treatment, ring hardness reaches 240-280 HB, raceway surface quenching, hardness at 55-62 HRC, all that ensures withstand the impact without plasic deformation occurs, increase the contact fatigue life, thus ensuring the use requirements of the bearing service life of 20 years.
Our Company provides four main types of slewing bearings, as shown in the following figure:
Single-row four-point contact ball series 01
|
Single-row crossed roller series 11
|
Double-row ball series 02
|
Tri-row pin roller series 13
|
Our Company can also design and manufacture other types of slewing bearings according to user’s needs, e.g. double-row ball slewing bearing, ball-pin combined slewing bearing, and light-weighted slewing bearing, etc.
For detailed drawing, please contact us directly.
Detailed Pictures
Production Process
Certification Show
Application
Ø History
l Headquarter founded in the 1980s as a state-owned enterprise, reformed to be one limited liability company in 2005.
l Start to produce slewing ring in 1995, have own brand name for slewing ring.
l Four subsidiaries belong to the headquarter: Ring mill plant, Slewing ring plant, Wheel hub plant, Beijing Titanhorse International Trade Dept.
Ø Company Scale
l Total area: 100,000sq.m
l Factory: 60,000sq.m
l Office: 7,000sq.m
l 700 employees
l Lines of product: forged raw rings (The raw material of slewing ring), Slewing rings, Wheel hub
Ø Production Scale
l Slewing ring 50,000pcs/month
l Ring/flange 8,000pcs/month
l Wheel hub 20,000pcs/month
Ø Unique Advantage
l 6 series of slewing ring, the raceway diameter ranges from 200-5,000mm
l Germany 5S standard site management and QC management engineering standards
l ISO9001:2008, OHSAS18001:1999, ISO14001:2004
Operation & Maintanence
Suitable lubrication is necessary for durability of raceway and gear. Lubricating grease improves capability and service life of slewing bearing, while working condition, e.g. load, temperature, speed, and vibration, determines lubricant selection.
Characteristics of recommended lubricant for slewing bearing:
² Lithium base grease
² Minimum viscosity of base oil: 150 mm2/S
² NLGI consistency grade: 2
² Anti-friction and extreme pressure additive
² Working temperature: -300 Ca+1200 C
² Four-ball test: Clinkering load STMD 2596 (NT24)>300
² Maximum NDM value (revolving speed x raceway center diameter)
ü For ball slewing bearing=60000
ü For pin roller slewing bearing=30000
Lubricating grease compatibility table
According to our experience, the lubricating greases listed in the following table are compatible with each other and with all parts of slewing bearing. Any other grease which is deemed compatible with any of the lubricating greases recommended by the Company is usable. However, molybdenum-containing disulphide MOS2 is strictly prohibited.
Grease for raceway of slewing bearing |
Lubricating grease designation |
Grease for gear | ||||
| Aralub HLP2 | ARAL | Aralub LFZ1 |
| ||
| Rhus L 474/2 | MOTUL/bECHEM | Berulit GA 400 |
| ||
| Energrease LS-EP2 | BP | EnergolwRL/GR 154 GS |
| ||
| Grease LMX | CASTROL |
| |||
| Epexa2/Epexelf2 | ELF | Cardrexa DC1 |
| ||
| Beacon EP2 | ESSO | Surret Fluid NX |
| ||
| Mobilux EP2 | MOBIL | Mobilgear OGL 007 |
| ||
| Retina EP2-Alvania EPLF2 | SHELL | Malleus GL 205 |
| ||
| Multis EP2-Lical EP2 | TOTAL FINA ELF | Ceran AD |
| ||
This table is subject to update by manufacturer.
Removal of Common Faults
Difficult turning of slewing bearing
Every slewing bearing goes through strict inspection and test run before being released from plant, so all of them are acceptable products. As the slewing bearing has pre-tightening force on its sealing face and frictional force of the sealing face should be overcome for turning, it’s normal that certain starting moment is needed when it is turned.
In case of clamping stagnation in turning, the following method should be taken to remove the trouble:
Case |
Cause analysis |
Troubleshooting methods |
Inflexible idling of new product | The slewing bearing has been stored for long time (e.g. over a half year) or the ambient temperature is low, which results in less liquidity of the grease inside, leading to inflexible operation. This case is prominent in cold regions and in winter. | After force is exerted, if it works well without any abnormal sound, it can serve for normal serve, but new grease should be filled until it is oozed from the seal. If operation is accompanied with any abnormal sound, check whether there is any damage caused during transport or storage and feedback the information to our after-sale service department for a solution. |
Inflexible operation after installation | The mounting surface of the main machine does not match well with that of the slewing bearing, resulting in that after installation, axial clearance of the slewing bearing can’t compensate for deformation of the slewing bearing, raceway of the slewing bearing is distorted, and the roller moves with difficulty in raceway (sometimes with abnormal sound). |
Rework mounting surface of the main machine to make it in compliance with the requirements; or treat the surface by filling in plastic or partial washer. If flatness is still unacceptable after completion of surface treatment, try to exchange for a slewing bearing with larger clearance. |
Bad gear engagement is caused by failure to adjust gear backlash according to radial top point of gear pitch circle (three teeth marked with green paint). Deformation is caused by compressing the slewing bearing at the top point, resulting in difficult turning or abnormal sound. | Adjust gear and pinion engagement and gear backlash again as required. | |
Impurities are jammed in the gear and pinion. | Check and be sure that gear and pinion engagement is free of impurities. | |
Inflexible operation in use | The sealing strip is broken, resulting in entry of impurities into raceway. |
Replace sealing strip or take effective sealing protection measures, e.g. installing guard plates. |
Failure to lubricate it with sufficient grease periodically according to the maintenance requirement, resulting in abnormal wear and tear of raceway. | Lubricate it with sufficient grease until grease is oozed out from the sealing strip. It’s noted that every oil cup should be oiled, and operation should be kept in oiling, if possible. If wear and tear is serious, the slewing bearing should be replaced. If you continue using it in short time, lubricate it with more amount of grease until grease overflows, so that the scrap iron is discharged as most as possible. | |
Abnormal engagement between gear and pinion, with impurities or broken teeth | Remove impurities (if any); replace the slewing bearing, if there is any broken tooth. |
Contact Us
- Beijing Titanhorse Industry & Trading Co., Ltd.
- Contact nameWendy Dong Chat Now
- Phone86-10-63870478
- AddressRoom 5033, No. 9 Building, No. 16, Fengguan Road
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