Liquid-Cooled Assembly Mount for Thermal Management
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Solution Overview
Problem
Existing assembly mounts face reduced service life and unfavorable acoustic properties due to high temperatures, especially when using silicone-based spring bodies, which are not resistant to damping fluids and have limited temperature tolerance.
Innovation Solution
The implementation of a liquid-cooled assembly mount design with double-walled support bearings and housings forming coolant chambers, using a coolant circuit to maintain non-critical temperatures below 80°C, allowing the use of elastomeric materials with improved durability and acoustic properties, and eliminating the need for protective layers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If silicone-based spring bodies are used to withstand high temperatures, then temperature resistance is improved, but acoustic properties deteriorate and compatibility with damping fluids worsens
Solution Approach 1:
A protective layer made of fluorinated elastomer is introduced as an intermediary between the silicone spring body and the damping fluid. This protective layer is impermeable to the damping fluid, preventing fluid penetration into the spring body while allowing the spring body to maintain its superior temperature resistance and acoustic properties.
Solution Approach 2:
The patent changes the material parameter of the protective layer to fluorinated elastomer, which has specific properties including fluorine content of 15-40% by weight and glass transition temperature of -50°C to -100°C. This material parameter change enables the protective layer to remain flexible at operating temperatures while being impermeable to damping fluids.
2Strength
If metallic support bearings are used for structural strength, then strength is improved, but heat conduction to the spring body worsens
Solution Approach 1:
A protective layer of fluorinated elastomer is introduced as a thermal barrier between the metallic support bearing and the spring body. This protective layer has low thermal conductivity, preventing heat from the metallic bearing from reaching the spring body while allowing the bearing to maintain its structural strength.
Solution Approach 2:
The support bearing is designed as a composite structure combining metallic material for structural strength and fluorinated elastomer for thermal protection. This composite construction allows the bearing to provide mechanical strength while the elastomer layer isolates the spring body from harmful thermal effects.
3Device complexity
If the housing is made single-walled for simplicity, then device complexity is reduced, but thermal insulation performance worsens
Solution Approach 1:
The housing is segmented into an outer housing wall and an inner housing wall with a cooling channel space between them. This segmentation creates a thermal barrier that protects the spring body from thermal radiation while allowing coolant circulation to actively remove heat from the mounting assembly.
Solution Approach 2:
A cooling channel is introduced into the housing structure, allowing coolant to circulate through the space between the outer and inner housing walls. This hydraulic cooling system actively removes heat from the mounting assembly, compensating for the increased structural complexity of the double-walled housing.
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 ensures consistent good functional properties of the spring body over a long period, reduces heat exposure to critical components, and enhances acoustic insulation, enabling the use of elastomeric materials at higher temperatures without compromising durability.
Implementation Method 1
the coolant inlets and the coolant outlets form part of a coolant circuit, with a coolant pump, for example in the vehicle, causing the coolant to circulate through the liquid cooling system
Implementation Method 2
The housing keeps heat as a result of radiation, emanating from the engine and especially from the exhaust system including the exhaust gas turbocharger, away from the interior of the unit mount, especially from the spring body
Data Source
AI summary
The invention relates to an assembly mount, comprising a support bearing (1), a support (2) and a spring body (3) made of a resilient material, wherein the support bearing (1) has at least one first connecting surface (4), the support (2) has at least one second connecting surface (5) and the spring body (3) has at least one third connecting surface (6) and at least one fourth connecting surface (7), and wherein the first connecting surface (4) of the support bearing (1) is connected to the third connecting surface (6) of the spring body (3) and the second connecting surface (5) of the support (2) is connected to the fourth connecting surface (7) of the spring body (3). The first connecting surface (4) of the support bearing (1) and the third connecting surface (6) of the spring body (3) and/or the second connecting surface (5) of the support (2) and the fourth connecting surface (7) of the spring body (3) are designed to be liquid-cooled by means of liquid cooling (8).