Cooling Jacket Radial Deformation Sealing
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Solution Overview
Problem
Existing cooling jackets for machines, particularly electrical machines, suffer from unintentional fluid leakage due to inadequate sealing, which becomes apparent only after end shields are mounted, and struggle to withstand pressure fluctuations during operation.
Innovation Solution
A cooling jacket design featuring a radial deformation that connects the jacket to a sealing means, creating a wedge-shaped cross-section at the opening, allowing for enhanced sealing and reduced leakage by compressing the sealant over its entire axial length, thus maintaining tightness before end shield attachment and accommodating varying pressures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional sealing method is used in the cooling jacket, then the sealing is only effective after end shields are mounted, but fluid leakage occurs during operation before end shields are attached
Solution Approach 1:
The radial deformation is applied to the jacket before the cooling jacket is assembled into the machine, creating a pre-compressed sealing condition at the opening. This preliminary action allows the sealing means to be effective immediately upon fluid introduction, enabling tightness checks before end shield mounting and preventing fluid escape during operation.
2Reliability
If the sealing means is compressed only at the end shield interface, then the sealing is insufficient, but compressing the sealant over the entire axial length increases manufacturing complexity
Solution Approach 1:
The sealing function is segmented into two parts: the radial deformation provides compression along the entire axial length of the opening, while the end shield provides additional sealing at the interface. This segmentation allows the sealing means to be effectively compressed over the full axial length without requiring a completely redesigned sealing structure.
Solution Approach 2:
The radial deformation creates a curved, wedge-shaped compression profile in the opening that tapers from a larger radius at one end to a smaller radius at the other end. This curved geometry naturally distributes the compressive force on the sealing means along the entire axial length, providing uniform sealing pressure without complex mechanical structures.
3Power
If the cooling jacket operates with high pressure fluctuations, then cooling performance is improved, but fluid leakage increases due to inadequate sealing
Solution Approach 1:
The radial deformation pre-compresses the sealing means before pressure fluctuations occur during operation. This beforehand cushioning creates a resilient sealing condition that can withstand subsequent pressure variations, preventing fluid leakage even when the cooling jacket operates with high pressure fluctuations for optimal cooling performance.
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 radial deformation effectively reduces fluid leakage from the cooling jacket, ensuring better protection of machine components from fluid exposure and preventing electrical conductive connections that could lead to damage or safety hazards, while allowing for easier manufacturing and maintenance by enabling pre-assembly tightness checks.
Implementation Method 1
The radial deformation, which extends into the opening, connects the jacket to the sealing means. The opening is advantageously sealed in such a way that the fluid flowing in the cooling jacket is reduced from escaping from the opening.
Implementation Method 2
The radial deformation reduces leakage of the fluid flowing in the cooling jacket by being able to withstand higher pressures and large pressure fluctuations.
Data Source
Figure 1~2
Figure 3
Figure 4~9
AI summary
The invention relates to a cooling jacket (1, 31) for cooling by means of a fluid (14) flowing in the cooling jacket (1, 31), comprising a jacket (2) that has an inner jacket (3, 103) and an outer jacket (4, 44, 74, 94, 104, 114). The jacket (1) has an opening (6, 46, 56, 86, 96, 106, 146) at an axial end (5, 145). The cooling jacket further comprises a sealing means (7, 37, 97, 107, 117, 127, 137) in the opening (6, 46, 56, 86, 96, 106, 146) as well as a radial deformation (8, 58, 68, 98, 108, 118) which connects the jacket (2) to the sealing means (7, 37, 97, 107, 117, 127, 137) and extends into the opening (6, 46, 56, 86, 96, 106). The invention further relates to a jacket (2) for the cooling jacket (1, 31), said jacket (2) being connectible to the sealing means (7, 37, 97, 107, 117, 127, 137) by means of the radial deformation (8, 58, 68, 98, 108, 118), a sealing means (7, 37, 97, 107, 117, 127, 137) for the cooling jacket (1, 31), said sealing means (7, 37, 97, 107, 117, 127, 137) being connectible to the jacket (2) by means of the radial deformation (8, 58, 68, 98, 108, 118), a machine, in particular an electric machine comprising said cooling jacket (1, 31), a method for producing the cooling jacket (1, 31) in which a connection between the jacket (2) and the sealing means (7, 37, 97, 107, 117, 127, 137) is created, and methods for producing said machine, in particular said electric machine, in which the tightness of the cooling jacket (1, 31) is tested before mounting an end shield (112, 122) on the cooling jacket (1, 31).