Integrated Slewing Bearing-Gearbox Structure Without a Main Shaft
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Solution Overview
Problem
Traditional high-power wind turbines have a large size, heavy weight, and high cost due to the traditional connection between the spindle assembly and gearbox, which includes multiple bearings and a main shaft, leading to increased costs and complexity.
Innovation Solution
A three-row roller slewing bearing-gearbox integrated structure that eliminates the need for a main shaft and split or integral bearing seats by directly connecting the three-row roller slewing bearing to the gearbox, providing excellent rigidity and reducing size and weight through a simplified design.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional connection between spindle assembly and gearbox with multiple bearings and main shaft is used, then reliable load transfer is ensured, but device complexity, size, and weight increase
Solution Approach 1:
The patent combines the slewing bearing and gearbox into a single integrated structure where the outer ring of the slewing bearing is directly connected to the gearbox housing, and the inner ring is connected to the planet carrier. This merging eliminates the need for separate main shafts and bearing seats, reducing structural complexity while maintaining load transfer reliability through the integrated rigid connection.
Solution Approach 2:
The slewing bearing in this invention serves multiple functions simultaneously: it acts as both a support bearing for the gearbox and a structural connection element between the rotor and gearbox. The bearing rings directly integrate with both the gearbox housing and the planet carrier, making the bearing a multi-functional component that reduces overall system complexity.
2Stability of the object's composition
If traditional connection with main shaft and bearing seats is used, then structural stability is maintained, but weight and size increase
Solution Approach 1:
The patent extracts and eliminates the separate main shaft and bearing seat components from the traditional design. By directly integrating the sleving bearing rings with the gearbox housing and planet carrier, the design removes unnecessary structural elements that contributed to weight and size while maintaining structural stability through the integrated connection.
3Reliability
If traditional connection structure is used, then load transfer is reliable, but manufacturing cost increases
Solution Approach 1:
The integrated design merges the slewing bearing and gearbox into one unified structure, reducing the total number of parts that need to be manufactured, assembled, and maintained. This consolidation simplifies the manufacturing process and reduces costs while preserving reliable load transfer through the direct structural connection between bearing rings and gearbox components.
Data Source
AI summary
A three-row roller slewing bearing-gearbox integrated structure, including a three-row roller slewing bearing and a gearbox. The three-row roller slewing bearing includes an outer ring, a first inner ring, and a second inner ring. The first inner ring and the second inner ring are connected to each other. The outer ring is sleevedly provided outside the first inner ring and the second inner ring. The gearbox includes a housing, an inner ring gear, and a first-stage planet carrier. The inner ring gear is fixedly connected to the housing. The first-stage planet carrier is provided in the housing. The first-stage planet carrier is rotatable relative to the housing. The outer ring is connected to the inner ring gear, and the first inner ring is connected to the first-stage planet carrier.