Toroidal CVT Roller Cooling Nozzle for Friction Heat Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Toroidal Continuously Variable Transmissions (CVTs) face premature degradation due to heat generated from friction between rollers and disks, necessitating effective cooling solutions to maintain transmission efficiency.
Innovation Solution
A cooling arrangement featuring nozzles configured to project cooling fluid onto the edge and opposite surfaces of rollers in a toroidal CVT, ensuring increased contact surface area and efficient cooling, with a hub and hollow shaft system for fluid distribution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If cooling fluid is projected only onto the roller surface, then the cooling structure is simple, but the cooling efficiency is insufficient due to limited contact surface area
Solution Approach 1:
The cooling system transitions from two-dimensional surface cooling to three-dimensional cooling by injecting cooling fluid into the roller interior through radial holes and distributing it to multiple surfaces (peripheral, top, and bottom surfaces) simultaneously, dramatically increasing the contact surface area between cooling fluid and roller
2Temperature
If multiple nozzles are added to cool all roller surfaces, then the cooling efficiency improves, but the device complexity increases
Solution Approach 1:
Multiple cooling functions (cooling peripheral surface, top surface, and bottom surface) are merged into a single integrated nozzle structure that simultaneously injects cooling fluid into the roller interior and distributes it to multiple surfaces through internal passages and radial holes
Solution Approach 2:
The nozzle is designed as a multi-functional component that performs multiple cooling tasks (cooling different roller surfaces) through a single device, eliminating the need for separate nozzles for each surface and reducing overall system complexity
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 solution effectively cools the rollers by increasing the contact surface area with the cooling fluid, thereby reducing heat buildup and prolonging the lifespan of the transmission components.
Implementation Method 1
a nozzle so configured and positioned as to project cooling fluid onto the edge and onto the opposite surfaces of the roller
Data Source
AI summary
A cooling arrangement to cool the rollers of a toroidal CVT is described herein. The cooling arrangement includes nozzles so configured and sized as to project cooling fluid onto the edge and onto the opposite top and bottom surfaces of the roller.