Gearbox Cooling Ring Using Suction Jet Air Entrainment
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Solution Overview
Problem
There is a constant need to implement cooling of a transmission in as space-saving a manner as possible.
Innovation Solution
A transmission cooling device that includes a transmission housing part, a fan connected to the transmission housing part, and a hollow fan ring. The fan generates an operating flow that fluidically communicates with the fan ring, creating a suction jet effect through a discharge opening. This setup enhances the cooling air flow by drawing in ambient air, increasing the volume flow and cooling capacity without requiring additional space.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If a fan is used to generate cooling air flow directly against the transmission housing, then the cooling air flow volume is limited by the fan's direct output, but the cooling capacity is insufficient without additional space for larger fans or multiple fans
Solution Approach 1:
The patent applies pneumatic principles by using a hollow fan ring with internal channels to guide and accelerate air flow. The fan ring receives air from the conveying element and directs it through controlled passages to create a focused, high-velocity cooling jet against the transmission housing, enhancing cooling efficiency within limited space
Solution Approach 2:
The patent changes the physical parameters of air flow by using the hollow fan ring to accelerate and direct the air stream. The fan ring transforms the air flow from a diffuse pattern to a concentrated, high-velocity jet, increasing the cooling effect without requiring a larger fan or more installation space
2Volume of moving object
If the conveying element is positioned close to the transmission housing for direct cooling, then the installation space is reduced, but the conveying element may interfere with other internals and the cooling coverage is limited
Solution Approach 1:
The hollow fan ring serves as an intermediary device between the conveying element and the transmission housing. It receives air from the conveying element, guides it through internal channels, and directs it precisely onto the transmission housing surface, eliminating the need for the conveying element to be positioned close to the housing while maintaining effective cooling coverage
Solution Approach 2:
The patent uses the hollow fan ring to extend the cooling capability into a different spatial dimension. The fan ring's internal channels and external geometry allow it to distribute air flow across a broader area of the transmission housing, overcoming the limitations of direct linear air flow from the conveying element
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 achieves effective space-saving cooling of the transmission by generating a higher volume flow of cooling air through the suction jet effect, resulting in a significantly increased cooling capacity compared to direct airflow methods.
Implementation Method 1
the operating flow, which flows out via the discharge opening, generates the cooling air flow by means of a suction jet effect
Implementation Method 2
a volume flow of the cooling air flow is composed at least of a volume flow of the operating flow and a volume flow of the ambient air carried along by the operating flow owing to the suction jet effect
Implementation Method 3
the operating flow, which flows out via the discharge opening, generates the cooling air flow by means of a suction jet effect
Implementation Method 4
a fan, which is connected to the transmission housing part, for providing a cooling air flow against an outer side of the transmission housing part
Data Source
AI summary
A transmission cooling device includes a transmission housing part for housing rotating transmission elements and a fan, which is connected to the transmission housing part, for providing a cooling air flow against an outer side of the transmission housing part. The fan has a conveying element, which communicates with a hollow fan ring, for generating an operating flow within the fan ring. The fan ring communicates via at least one discharge opening with a volume provided radially within the fan ring in such a way that the operating flow generates the cooling air flow by a suction jet effect. Indirectly generating the cooling air flow with the aid of the operating flow generated by the conveying element in the hollow fan ring results in good cooling with a large flow cross section of the cooling air flow with small installation space requirement, thereby enabling space-saving cooling of a transmission.