Wear Ring Tab Design for Integrated Drive Generator Speed Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Integrated drive generators face challenges in maintaining a constant frequency of generated electric power due to varying input shaft speeds, which requires effective speed trimming mechanisms to stabilize the output speed and frequency.
Innovation Solution
A wear ring design is implemented in the speed trimming unit, featuring a cylindrical body with a radially extending tab that prevents rotation, ensuring precise control of speed and direction through interaction with the swash plate and hydraulic units, thereby stabilizing the output speed and frequency of the generator.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a wear ring is designed to prevent rotation in the speed trimming unit, then the control precision of speed and direction is improved, but the device complexity increases due to the additional tab structure and its interaction components
Solution Approach 1:
The wear ring is segmented into a cylindrical body and a radially extending tab portion. This segmentation allows the tab to interact with the swash plate for rotational prevention while the cylindrical body maintains the hydraulic connection, thereby achieving precise speed control without overly complicating the overall structure.
Solution Approach 2:
The tab on the wear ring acts as an intermediary element between the hydraulic unit and the swash plate. It transmits the rotational constraint from the swash plate to the cylindrical body, enabling precise speed and direction control while maintaining a relatively simple wear ring design.
2Stability of the object's composition
If the wear ring includes a radially extending tab to prevent rotation, then the stability of output speed and frequency is improved, but the manufacturing complexity increases due to the additional radial tab feature
Solution Approach 1:
The wear ring is segmented into a cylindrical body and a radially extending tab portion. This segmentation allows the tab to interact with the swash plate for rotational prevention while the cylindrical body maintains the hydraulic connection, thereby achieving precise speed control without overly complicating the overall structure.
Solution Approach 2:
The radially extending tab provides localized rotational constraint at the interface with the swash plate, while the rest of the cylindrical body maintains its simple hydraulic connection function. This local quality approach stabilizes output speed without requiring complex features throughout the entire wear ring structure.
3Productivity
If the wear ring design incorporates interaction with swash plate and hydraulic units for precise control, then the efficiency of speed trimming mechanism is improved, but the device complexity increases
Solution Approach 1:
The wear ring serves multiple functions: it maintains hydraulic connection through its cylindrical body and prevents rotation through its radially extending tab. This multi-functionality improves speed trimming efficiency without requiring separate components for each function, thereby limiting the increase in device complexity.
Solution Approach 2:
The wear ring combines the hydraulic connection function (cylindrical body) and the rotational prevention function (radially extending tab) into a single integrated component. This merging improves the efficiency of the speed trimming mechanism by ensuring coordinated action between hydraulic control and rotational constraint while avoiding the complexity of multiple separate parts.
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
The wear ring design effectively stabilizes the output speed and frequency of the generator by preventing rotation and ensuring precise control, enhancing the efficiency of the speed trimming mechanism and maintaining consistent electric power generation.
Implementation Method 1
A wear ring that is incorporated into the trimming unit faces design challenges
Data Source
Figure 1
Figure 2~3
Figure 4A~4B
AI summary
A wear ring for use in an integrated drive generator has a cylindrical body defining an axis and having a tab (150) extending radially outwardly of an outer cylindrical surface of the cylindrical body. The tab has a radially outer point (151). A ratio of a first radius to the outer cylindrical surface from the axis to a second radius extending to the radially outer point from the axis is between .90 and .95. An integrated drive generator and a method are also disclosed.