Koepe Hoisting Winding Machine Stator Attachment
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Solution Overview
Problem
The existing traction sheave shaft hoisting machines with internal electric motors have complex stator attachment mechanisms, requiring significant space and leading to maintenance challenges, noise issues due to axle movements in bearing blocks, and production complexities related to tolerances and clamping rings.
Innovation Solution
The design features two partial axles made of solid material with outer and inner flanges, a holding element between the inner flanges for stator attachment, and outer flanges connected to bearing blocks, allowing for simplified assembly and independent manufacturing of the stator and partial axes, with radial adjustment of the stator and improved load transfer through flange connections.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the stator is attached to the axle using two clamping rings and forged flanges, then the stator can be securely fixed, but the attachment mechanism becomes complex and requires significant space
Solution Approach 1:
The axle is divided into two separate partial axles that are joined together, with the holding element for the stator positioned between them. This segmentation allows the stator attachment to be decoupled from the bearing block connections, simplifying the overall structure while maintaining security of attachment
Solution Approach 2:
The holding element combines multiple functions: it serves as both the stator mounting bracket and the connection element between the two partial axles. By merging these functions into a single component, the number of separate parts is reduced, simplifying the attachment mechanism
2Reliability
If the stator is attached via clamping rings with multiple tolerance considerations, then secure fixation is achieved, but production coordination becomes complex
Solution Approach 1:
By separating the stator holding function from the axle support function through the use of distinct holding elements and partial axles, the manufacturing processes can be independently optimized. The holding element with its hole circles can be manufactured to specific tolerances without being constrained by the tolerance requirements of the bearing block mounting features
Solution Approach 2:
The stator holding function is extracted as a separate holding element that can be designed and manufactured independently. This extraction allows the production of the stator assembly to be coordinated separately from the axle manufacturing, reducing production complexity
3Ease of manufacture
If the axle is designed as a one-piece solid steel axle, then manufacturing is simpler and cheaper, but the stator attachment requires complex clamping ring connections
Solution Approach 1:
The axle is segmented into two partial axles that are joined together, creating a structure that maintains the simplicity of solid material construction while providing a dedicated interface (holding element) for simplified stator attachment. The segmentation enables a more efficient structural arrangement without compromising manufacturing ease
4Reliability
If the axle ends are designed as square edges for bearing block engagement, then the axle can be securely mounted, but movements and noise occur under load changes
Solution Approach 1:
The connection between the partial axles and bearing blocks is designed to accommodate dynamic load changes. The flange and screw configuration allows for controlled movement and stress distribution that prevents the noise and unwanted movements associated with rigid square edge engagement while maintaining secure mounting
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 design simplifies stator attachment, reduces noise by eliminating relative movements, and optimizes production by eliminating the need for complex clamping ring connections and square edge machining, enhancing maintenance predictability and load transfer efficiency.
Implementation Method 1
Cooling air is led in at the front side of the rotor and flows through the air gap between rotor and stator
Data Source
Figure 1
Figure 2
AI summary
The invention relates to a Koepe hoisting winding machine, comprising an electric motor, the rotor of which is connected to a cylinder jacket of the Koepe sheave and the stator of which is arranged on an axis mounted in bearing blocks, wherein the motor is located inside the cylinder jacket and between the lateral shields of the Koepe sheave in a cavity, which can be supplied with cooling air by way of axial cooling air passages for cooling the motor. In order to create a less complex design for a Koepe hoisting winding machine while maintaining the advantages of an axis made of solid material, the invention proposes that the axis is formed of two partial axes made of solid material, wherein an outer flange and an inner flange connect to the face of each partial axis, wherein a holding element to which the stator is fastened is clamped between the two inner flanges, and wherein the two outer flanges are fastened to the bearing blocks.