Compressor Electrical Feedthrough Sealing With Radial Pressure
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Solution Overview
Problem
Conventional sealing arrangements for electrically driven compressors in refrigerant circuits face challenges in achieving reliable and cost-effective hermetic sealing due to production-related deviations in glass-metal feed-throughs and the complexity of using multiple sealing elements, which can lead to increased assembly time and costs.
Innovation Solution
A sealing arrangement featuring a two-component structure with a connection terminal element and a pressure element, where the sealing element is radially enclosed by the holding element and a pressure element, providing a fluid-tight seal through a pressure force acting on the sealing element, reducing the number of components and simplifying assembly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If glass-metal feed-throughs with elastic shape parts are used for sealing, then hermetic sealing and electrical insulation are achieved, but production-related deviations in glass shape lead to increased assembly complexity and time
Solution Approach 1:
The patent combines the sealing element and holding element into a single integrated component. The holding element features an integrated receptacle that receives the sealing element, eliminating the need for separate glass-metal feed-throughs and reducing assembly steps while maintaining hermetic sealing reliability
Solution Approach 2:
The sealing arrangement is segmented into functional zones within the integrated holding element: the receptacle for the sealing element, the pressure element application zone, and the radial sealing zone. This segmentation allows each function to be optimized independently while simplifying overall assembly
2Reliability
If multiple sealing elements are used to compensate for production deviations, then sealing reliability is improved, but the number of components and assembly time increase
Solution Approach 1:
The patent changes the geometric parameters of the integrated holding element, specifically the receptacle dimensions and the pressure element configuration, to accommodate production deviations in the sealing element while maintaining effective sealing with a single component rather than multiple components
3Reliability
If conventional glass-metal feed-throughs are used, then electrical insulation is achieved, but the shape and amount of glass are difficult to adjust and reproduce
Solution Approach 1:
The integrated holding element combines different materials with complementary properties: the holding element material provides structural support and electrical insulation, while the sealing element material provides hermetic sealing. This composite approach allows independent optimization of each material's properties and easier adjustment during manufacturing
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 minimizes production and assembly costs while ensuring maximum functional safety with a simplified structure and reduced complexity, achieving effective radial sealing without the need for separate metal sealing elements.
Implementation Method 1
a pressure element (21) for creating a sealing by means of a pressure force on the sealing element (20) acting in the direction of the longitudinal axis (13)
Data Source
AI summary
A sealing arrangement for guiding electrical connections through a wall of a housing for a device for driving a compressor. The sealing arrangement has a connection arrangement with at least one electrically conductive connection element and a holding element, at least one connection terminal element for receiving the connection element in the direction of a longitudinal axis and at least one pressure element. The connection terminal element is enclosed respectively by the holding element and a sealing element around the whole circumference. In doing so, the sealing element is sealingly arranged in the region of a feed-through opening of the housing between the housing and the connection terminal element and respectively in the radial direction. The pressure element is formed for creating a sealing acting in the radial direction by means of a pressure force on the sealing element acting in the direction of the longitudinal axis.