Gearbox Housing Coolant Channel Layout for Blind-Area Heat Dissipation
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Solution Overview
Problem
Conventional liquid cooling heat dissipation structures in gearbox casings have a small heat dissipation area and coolant blind areas, leading to poor heat exchange performance, which affects the gearbox's transmission performance and service life, especially in high-power vehicles.
Innovation Solution
The gearbox casing incorporates multiple coolant tanks with parallel partition walls and interlaced guide ribs forming S-shaped or maze channels, along with suspended guide ribs to enhance coolant flow and prevent eddies, increasing the heat dissipation contact area and efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If conventional liquid cooling heat dissipation structures are used, then the structure is simple, but the heat dissipation area is small and heat exchange efficiency is poor
Solution Approach 1:
The coolant tank is divided into multiple compartments by partition walls, with each compartment containing guide ribs that create independent flow channels. This segmentation increases the heat dissipation area while organizing the coolant flow path to avoid blind spots, resolving the contradiction between expanding heat dissipation area and maintaining structural simplicity.
Solution Approach 2:
Guide ribs are added in the vertical dimension within the coolant tank, creating three-dimensional flow channels rather than simple planar paths. This dimensional addition significantly increases the heat dissipation area and ensures comprehensive coolant circulation, transforming a two-dimensional cooling surface into a three-dimensional heat exchange system.
2Reliability
If conventional coolant tanks are used, then the structure is simple, but coolant blind areas are formed leading to poor heat exchange performance
Solution Approach 1:
Guide ribs are strategically positioned at specific locations within the coolant tank where blind spots are likely to form. These localized structural additions modify the coolant flow characteristics in critical areas, ensuring complete coverage and eliminating dead zones without requiring complete redesign of the entire tank structure.
Solution Approach 2:
The guide ribs are designed to automatically guide coolant flow through the entire tank volume, utilizing the coolant's own kinetic energy and pressure differential to achieve complete circulation. The structure enables the coolant to self-organize into an efficient flow pattern that eliminates blind areas without requiring external control mechanisms.
3Duration of action of stationary object
If conventional heat dissipation structures are used, then the cost is low, but the heat dissipation performance is poor affecting gearbox service life
Solution Approach 1:
The guide ribs and partition walls are pre-designed into the coolant tank structure, creating optimized flow paths before the gearbox operates. This preliminary structural arrangement ensures that coolant flow is efficiently distributed across all heat-generating areas from the start of operation, preventing localized overheating that would otherwise reduce gearbox service life.
Solution Approach 2:
The cooling system combines multiple structural elements (tank body, partition walls, guide ribs) into a composite cooling structure that works synergistically. This composite design achieves superior heat dissipation performance compared to simple single-structure cooling systems, thereby extending gearbox service life through more effective thermal management.
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 significantly improves heat exchange efficiency and prevents coolant blind areas, resulting in a gearbox casing with high heat dissipation performance and cost-effectiveness compared to traditional structures.
Implementation Method 1
the first coolant tanks are used to cool the lubricating liquid
Implementation Method 2
forming a continuous S-shaped or maze shaped channel for the coolant to flow through
Data Source
AI summary
A gearbox casing is provided in which a bottom part or a side part of the gearbox casing has a number of first coolant tanks. The gearbox casing above a bottom part of the first coolant tanks is provided therein with a lubricating liquid, and the first coolant tanks are used to cool the lubricating liquid. A first coolant tank is provided therein with a number of parallel partition walls, by which the first coolant tank is separated into at least two communicated sub-tanks that are provided with first fixed guide ribs and first suspended guide ribs to divide the coolant.