Hydrostatic Transmission Cooling Apparatus with Protruding Members
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Solution Overview
Problem
Conventional hydrostatic transmissions require additional oil coolers to manage heat, leading to reduced space utilization and increased manufacturing costs due to the need for extra components.
Innovation Solution
A cooling apparatus integrated with the hydrostatic transmission system, featuring a cooling body with protruding members that form a through groove to reduce fluid friction and pressure drop, allowing the working fluid to flow smoothly and efficiently without the need for an additional oil cooler.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If an additional oil cooler is installed to cool the working fluid, then the cooling performance is improved, but the space utilization is reduced and manufacturing costs increase
Solution Approach 1:
The cooling apparatus is integrated into the hydrostatic transmission case, merging the cooling function with the transmission housing. The cooling body is formed within the case structure, eliminating the need for separate external oil coolers and reducing overall system complexity while maintaining effective cooling performance
2Temperature
If protruding members are arranged closely to increase cooling surface area, then cooling performance is improved, but fluid friction and pressure drop increase
Solution Approach 1:
Protruding members are strategically positioned at specific locations within the cooling flow path rather than uniformly distributed. This localized arrangement optimizes cooling where most needed while maintaining adequate flow passages, balancing cooling efficiency with acceptable pressure drop and power loss
3Temperature
If the cooling flow path is lengthened to improve cooling performance, then the cooling efficiency is improved, but the apparatus size increases
Solution Approach 1:
The cooling flow path is arranged in a nested configuration within the hydrostatic transmission case, utilizing the three-dimensional space efficiently. The cooling body is positioned to create a compact circulation path that maximizes cooling effectiveness within the existing case volume, avoiding external extensions
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 solution reduces fluid friction and pressure drop, minimizing power loss and manufacturing costs while maintaining adequate cooling performance, even at low temperatures, thus enhancing the stability and efficiency of the hydraulic system.
Implementation Method 1
a cooling flow path which cools a working fluid supplied from the hydrostatic transmission
Implementation Method 2
the protruding members are disposed in positions spaced apart from each other to form a through groove to allow the working fluid to pass therethrough
Data Source
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AI summary
The present invention relates to a cooling apparatus for a hydrostatic transmission which includes a cooling body (2) to be coupled with a hydrostatic transmission, a sidewall member (3) protruding from the cooling body to surround a cooling flow path which cools a working fluid supplied from the hydrostatic transmission and then discharges the working fluid into the hydrostatic transmission or a storage tank, an installing member (4) protruding from the cooling body at a position spaced apart from the sidewall member to be disposed inside the sidewall member, a detour member connected to the installing member and protruding from the cooling body to extend in a first axial direction to allow the working fluid, which flows along the cooling flow path, to make a detour, and a plurality of protruding members (6) protruding from the cooling body to be spaced apart from each of the sidewall member, the installing member, and the detour member in the cooling flow path. Here, the protruding members are arranged in positions spaced apart from each other to form a through groove to allow the working fluid to pass therethrough.