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Arrangement structure
This kind of scheme is widely used in the main shaft support structure of megawatt wind turbines. There are two common arrangements: one is that the tapered roller bearing is arranged in the upwind direction, the cylindrical roller bearing is arranged in the downwind position; the second is The tapered roller bearing is arranged in the downwind position, and the cylindrical roller bearing is arranged in the upwind direction. In either arrangement, a generally tapered roller bearing receives axial force as a fixed end support, while a cylindrical roller bearing acts as a floating end to absorb axial thermal expansion. When the tapered roller bearing is arranged in the upwind direction, the bearing capacity required for the bearing is much larger than that of the cylindrical roller bearing of the downwind direction because it not only has to bear a large radial force but also bears the axial force. Therefore, the cost of the bearing is relatively high, but the tapered roller bearing can adopt a pre-tightening, that is, a negative clearance, so that the rigidity of the hub end is improved.
2. Choice of clearance and cone angle
The more common combination of this type of solution is the NU/NNU cylindrical roller bearing plus double inner ring tapered roller bearing, and sometimes the NJ cylindrical roller bearing. The load distribution between two rows of rollers of double row tapered roller bearings is generally not uniform, and the force subjected to external axial force is much larger, and the fatigue life is correspondingly much smaller. To the extent that this situation is avoided. Figure 1 and Figure 2 show the comparison of the bearing areas formed by different clearances under the same working condition of a 1.5MW wind turbine.
The taper angle of tapered roller bearings used in this solution is generally small because the reduction of the taper angle in the same size can improve the radial load carrying capacity of the bearing. In addition, the small taper angle of the bearing can reduce the probability of a single row bearing condition of the double row tapered roller bearing.
About Us
Henan Weichuang Bearing Precision Technology Co.,Ltd.(WBM) was founded in 1988 which located in Lilou industrial zone, Luolong district, Luoyang, PRC. WBM is a professional provider of bearing cold heading dies, taper rollers, grinding tools and detection equipment and comprehensive service of consultation/trading in supply chain in bearing industry. Designing, production, sales, service and survey are all included in the quality management system. The plant is about 36300 ㎡. Nowadays, WBM has 80 patents for invention.
WBM has obtained the certificates of ISO9001:2000 and ISO/IATF16949, The outstanding reputation of WBM is built on our core managerial principles: technical innovation, high output quality and efficiency, honest working, meeting and beyond clients’ expectation.
Foundation:1988
Nature: Private(Family Control)
ISO9001:2000 in 2007
IATF16949 in 2013
ISO14001 & OHSAS 18001 in 2017
Our History
1988 Luoyang bearings mould co.,Ltd established
1993 Become the supplier of Rothe Erde GmbH(xuzhou)
2003 Named Luoyang weichuang bearings mould co., Ltd
2004 Awarded patent polit enterprise by henan intellectual property office
2004 Award Science-and-technology enterprise by henan Science and Technology Agency
2005 Phase I extension plant went into operation
2007 Got ISO9001
2009 Phase II extension plant went into operation
2012 Award henan famous brand
2013 Got IATF16949
2017 ISO14001 & OHSAS 18001
2017 Got the title of International High-Tech Enterprise
2018 We has officially changed its name from Luoyang bearings mould co.,Ltd to Henan Weichuang Bearing Precision Technology Co.,Ltd.
Vision&Mission
Our Vision
Promotion, Innovation, Manufacturing super quality，Leading the development of China bearings mold industry
Our Mission
Insisting on the concept of honest service and keeping improving;manufacturing each products carefully,in order to help customers increase efficiency
Quality Control
Weichuang is focused on the quality assurance since established.Our brand influence is improving by strict quality management and control,and leads the development of bearings rolling element dies and tooling with 20 years technical innovation. Now we have a complete quality management and control system, which can monitoring raw materials purchasing,process,delivery,quality statictics,performance test and others.
Certificate
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