Back-to-Back Planetary Test Box Coupling for Axial Displacement Control
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Solution Overview
Problem
The existing connecting structures for planetary back-to-back test benches face challenges with axial displacement and movement during high-speed operation, leading to unsafe and unstable planetary gear transmission tests due to limited connecting space.
Innovation Solution
A coupling device comprising a first and second output flange, transition coupling gears, a toothed flange, and an axial limiting unit with axial compensation grooves and radial limiting rings, allowing for precise and convenient connection and installation of test boxes, while compensating for axial displacement and ensuring stable operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If internal gear sleeves are used to connect the two connecting flanges, then the installation difficulty is solved, but axial displacement and movement occur during high-speed operation leading to unsafe operation
Solution Approach 1:
The connecting structure is divided into multiple functional components: connecting flanges for mounting, transition coupling gears for power transmission, toothed flanges for gear engagement, and axial limiting units with compensation grooves for positioning and displacement compensation. This segmentation allows each component to perform its specific function optimally, solving both installation convenience and operational safety requirements.
Solution Approach 2:
Transition coupling gears are introduced as intermediary components between the connecting flanges and toothed flanges. These transition coupling gears mesh with the toothed flanges while being connected to the output flanges, providing a reliable power transmission path that eliminates direct reliance on internal gear sleeves, thereby preventing axial displacement during operation.
2Volume of moving object
If the distance between test planetary gearbox and companion test planetary gearbox is limited, then the test bench size is reduced, but the connecting space becomes limited making installation difficult and accuracy hard to ensure
Solution Approach 1:
The connection approach transitions from relying on axial space (length dimension) to utilizing radial engagement through gear meshing. The toothed flanges and transition coupling gears engage through radial gear teeth interaction, allowing precise positioning and connection without requiring extensive axial distance, thus enabling compact test bench design while maintaining installation ease and accuracy.
Solution Approach 2:
The traditional mechanical connection using internal gear sleeves that required axial movement and space is replaced with a gear meshing system. The transition coupling gears and toothed flanges connect through gear tooth engagement, which provides precise positioning and rigid connection without requiring the same axial clearance, thereby solving the installation difficulty in limited space.
3Ease of manufacture
If internal gear sleeves are used for connection, then connecting structure is achieved, but large axial displacement and movement occur during high-speed operation
Solution Approach 1:
Axial limiting units are pre-installed on the toothed flanges, providing preliminary restraint against axial displacement before operation begins. These limiting units include axial compensation grooves that allow controlled accommodation of thermal expansion or manufacturing tolerances while preventing excessive axial movement during high-speed operation, thus maintaining connection stability.
Solution Approach 2:
The connection system transitions from a rigid internal gear sleeve connection with fixed axial parameters to a gear meshing system with adjustable axial clearance through compensation grooves. This parameter change allows the system to accommodate operational variations while maintaining stable axial positioning, eliminating the large axial displacements observed with internal gear sleeves.
Data Source
AI summary
A coupling device between a test box and a companion test box for back-to-back planetary testing to solve the problem of axial displacement and motion in the connecting structure of the existing back-to-back planetary test bench, which comprises a first output flange, a second output flange, a first transition coupling gear connected to the first output flange, a second transition coupling gear connected to the second output flange, a ring-shaped toothed flange with internal teeth coupled to the first and the second transition coupling gears, an axial limiting unit installed on the left and right sides of the toothed flange and extends towards the axis of the transmission shaft formed by two semicircular shaped grooved sleeve bodies, a radial limiting ring and screw rods, and an axial compensation groove formed on an inner sidewall of the axial limiting unit.