Rotor Winding Head Carrier Spring Support Against Gravity
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In large dynamoelectric machines, the thermal expansion of winding elements leads to high mechanical stresses and potential deformation due to the weight of the end winding carrier, which is exacerbated when the axis of rotation is aligned with gravity, causing the winding elements to bear excessive weight and potentially sink over time.
Innovation Solution
Incorporating spring elements between the rotor body and the end winding carrier to support the carrier in the axial direction, reducing the force that needs to be compensated by the winding elements during thermal expansion, and optionally pre-tensioning the springs to maintain stability during operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the axis of rotation is aligned with gravity to simplify machine structure, then the overall structure becomes simpler, but the winding elements bear excessive weight leading to high mechanical stresses and potential deformation
Solution Approach 1:
A spring element is introduced as an intermediary component between the end winding carrier and the rotor body. This spring element acts as a mediator that bears part of the weight of the end winding carrier, thereby reducing the mechanical stress on the winding elements while maintaining the gravity-aligned axis structure.
2Stability of the object's composition
If the end winding carrier is made heavy to provide structural support, then structural stability is improved, but the weight forces increase leading to high stresses that compress and deform winding elements
Solution Approach 1:
The spring element serves as a weight-bearing intermediary that distributes the load from the heavy end winding carrier. It carries part of the carrier's weight, reducing the compressive force transmitted to the winding elements while allowing the carrier to maintain its necessary structural mass for stability.
Solution Approach 2:
The spring element introduces elasticity into the previously rigid weight-bearing structure. By changing from a purely rigid support system to one with elastic components, the system can dynamically adjust to weight forces and thermal expansion, reducing peak stresses on the winding elements.
3Adaptability or versatility
If the winding head carrier is freely movable in the axial direction to accommodate thermal expansion, then thermal expansion compensation is improved, but the winding elements must overcome the entire weight of the carrier leading to excessive loading
Solution Approach 1:
The spring element acts as a weight-compensating intermediary that reduces the effective weight the winding elements must overcome during axial movement. It supports part of the carrier's weight, so during thermal expansion the winding elements only need to overcome the difference between spring force and carrier weight, not the entire carrier weight.
Solution Approach 2:
The spring element provides an upward counterbalancing force that offsets part of the downward gravitational force on the end winding carrier. This anti-weight effect reduces the net force that winding elements must overcome during axial displacement, easing the loading on these elements.
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 minimizes mechanical loading on the winding elements, allows for easier axial movement of the winding carrier, and prevents sinking, ensuring long-term trouble-free operation by balancing the weight of the end winding carrier and maintaining stability against gravity.
Implementation Method 1
spring elements (19) are provided in the region of this fastening, which act in the axial direction against gravity between the rotor body and/or a component rotating with it and the end winding carrier
Implementation Method 2
act in the axial direction against gravity
Implementation Method 3
Current flows through the winding heads. They are therefore heated to higher temperatures and expand.
Data Source
Figure 1~2
AI summary
The invention relates to a rotor (6) for a dynamo-electric machine (7) having: a rotor body (10) which rotates about a rotation axis (R) which runs in the direction of gravity (g); winding elements (14) which are arranged in slots (13) which run axially in the rotor body; two winding heads (9) which are arranged above and below the rotor body in the axial direction, wherein the winding elements emerge from the slots in the axial direction in the region of the winding heads and are connected to further winding elements; a winding head carrier (15) for each of the winding heads, which winding head carrier is arranged radially within the winding head and coaxially to the rotation axis, and which winding head carrier is fixed at least indirectly on the rotor body, or on a component which revolves with said rotor body, in a rotationally fixed manner and such that it can move in the direction of the rotation axis. The invention is characterized by the following features: spring elements (19) are provided in the region of the fixing means, said spring elements acting in the axial direction against the force of gravity (g) between the rotor body, and/or a component which revolves with said rotor body, and the winding head carrier (15); each of the winding head carriers (15) has at least one carrying ring (15.1, 15.2) which is integral or is segmented in the circumferential direction; each of the carrying rings is mounted at least indirectly in relation to the rotor body (10) in the axial direction by means of spring elements (19).