High-Voltage Feedthrough Sealing Groove Relocation
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Solution Overview
Problem
Existing high-voltage bushings face manufacturing complexities and cost inefficiencies due to the need for intricate processing of the insulating body to create a sealing groove, which can lead to damage and increased production costs, especially when capacitive control inserts are involved.
Innovation Solution
The sealing groove is arranged in the winding carrier instead of the insulating body, allowing the sealing element and ring to be pre-installed before the insulating body is applied, using an elastic plastic sealing element and a concentric sealing ring with a resin mixture for improved sealing, and protective elements to prevent resin ingress during impregnation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the sealing groove is worked into the insulating body during manufacture, then the sealing function is achieved, but the insulating body may be damaged and production costs increase
Solution Approach 1:
The sealing groove is segmented from the insulating body and relocated to the winding carrier, allowing independent manufacturing of each component. The winding carrier with sealing groove is assembled separately from the insulating body, eliminating the need to machine the hardened insulating body and reducing manufacturing complexity and damage risk.
Solution Approach 2:
The sealing groove is preliminarily formed in the winding carrier before the insulating body is applied and hardened. This preliminary action allows the groove to be created in a softer, more workable material, avoiding the need to machine the final hardened insulating body and reducing production costs.
2Reliability
If the sealing groove is milled into the hardened insulating body, then the sealing element can be installed, but the insulating body and capacitive control inserts may be damaged
Solution Approach 1:
The sealing groove is separated from the insulating body and placed in the winding carrier, allowing the insulating body to be manufactured and hardened without subsequent machining operations that could damage capacitive control inserts embedded in it.
Solution Approach 2:
The sealing groove is created in the winding carrier before the insulating body is applied and cured. This preliminary creation of the groove avoids any risk of damaging the insulating body or embedded capacitive control inserts during or after the hardening process.
3Reliability
If complex processing is applied to the insulating body to create the sealing groove, then the sealing function is achieved, but production costs increase
Solution Approach 1:
The sealing groove is manufactured in the winding carrier as a separate component, allowing each part to be optimized for its specific manufacturing process. The insulating body can be produced using cost-effective methods without requiring expensive post-hardening machining operations.
Solution Approach 2:
The sealing groove is preliminarily formed in the winding carrier while the insulating body is still in a workable state or before it is applied. This eliminates the need for complex, costly machining operations on the hardened insulating body, reducing production costs.
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 approach simplifies the manufacturing process, reduces the risk of insulating body damage, lowers production costs, and enhances the sealing effectiveness by eliminating the need for complex mechanical processing of the insulating body.
Implementation Method 1
The sealing element preferably contains an elastic plastic. The use of elastic plastic has the advantage that the sealing element can develop a counterforce when deformed.
Implementation Method 2
the insulating body is also impregnated with a liquid insulating medium
Data Source
Figure 1
AI summary
The invention relates to a high-voltage feedthrough (1) comprising an insulating body (4) arranged concentrically around a cylinder-shaped winding support (2) made of electrically conductive material, and comprising a sealing device for sealing a gap between the winding support (2) and the insulating body (4). In addition, the sealing device comprises a sealing element (8) in a peripheral sealing groove (7). The invention is characterised in that the peripheral sealing groove is arranged in the winding support and accommodates the sealing element. The invention also relates to a method for producing a high-voltage feedthrough (1) comprising an insulating body arranged concentrically around a cylinder-shaped winding support made of electrically conductive material, said insulating body having insulating layers (51) arranged concentrically in relation to one another, wherein a sealing element (8) is introduced into a peripheral sealing groove in the winding support, and the insulating body (4) is subsequently impregnated with a resin, such that a gap between the winding support and the insulating body is sealed.