Segmented Clamping Set for Rotor Shaft Assembly
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Solution Overview
Problem
The high costs and logistical challenges of mounting a rotor on a long and heavy propeller shaft in large electric drives, including the need for trained personnel and expensive transportation of individual components, are not effectively addressed by existing technologies.
Innovation Solution
A non-positive clamping set with an outer and inner clamping ring, segmented for easy assembly and disassembly, allows for a frictional connection between the shaft and the magnet wheel, enabling quick and cost-effective assembly without the need for trained personnel at the assembly site.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a flywheel hub construction is shrunk onto the shaft and poles are mounted, then the rotor components can be assembled, but the process requires trained personnel and causes high costs
Solution Approach 1:
The clamping set is divided into multiple segments (at least two separate outer clamping ring segments and at least two separate inner clamping ring segments) that can be assembled independently around the shaft, eliminating the need for complex shrink-fitting operations and reducing assembly complexity
Solution Approach 2:
The pole wheel is pre-assembled with the clamping set in a disassembled state at the production site, allowing components to be manufactured separately and transported efficiently, then quickly assembled on-site without requiring specialized shrink-fitting equipment or trained personnel
2Adaptability or versatility
If individual rotor components are manufactured at different production sites and transported, then manufacturing flexibility is improved, but transportation costs and logistics complexity increase
Solution Approach 1:
The clamping set is segmented into multiple parts that can be manufactured at different locations and transported separately, then assembled on-site around the shaft, reducing transportation logistics complexity while maintaining manufacturing flexibility
Solution Approach 2:
The inner clamping ring segments are inserted into the outer clamping ring segments, creating a nested structure that compactly accommodates multiple components, reducing transportation volume and logistics complexity while allowing distributed manufacturing
3Productivity
If a non-positive connection is used between shaft and pole wheel, then assembly time and costs are reduced, but connection reliability may be compromised
Solution Approach 1:
The clamping rings utilize conical surfaces (curved geometry) to convert axial clamping forces into radial compression forces on the pole wheel and shaft, creating a reliable friction-based non-positive connection that maintains connection reliability while enabling quick assembly
Solution Approach 2:
The clamping set acts as an intermediary mechanism between the shaft and pole wheel, providing a reliable connection through friction and mechanical interlocking without requiring permanent attachment, thus maintaining reliability while enabling disassembly and reassembly
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This solution reduces production costs and time by allowing the magnet wheel to be easily and quickly connected to the shaft, facilitating faster delivery and assembly of the electrical rotating machine, particularly in ship propulsion systems.
Implementation Method 1
the outer clamping ring and the inner clamping ring being axially displaceable with respect to one another with the clamping device
Data Source
Figure 1
Figure 2~3
Figure 4~5
AI summary
In summary, the invention relates to an electric rotating machine (1), comprising a rotor (3), which can be rotated about an axis of rotation (4). The rotor has a shaft (5), a pole wheel (6) surrounding the shaft (5), and at least one clamping set (7). In order to save time and reduce costs in production, according to the invention, a frictional connection between the shaft (5) and the pole wheel (6) is produced by means of the clamping set (7).