Mechanical Seal Cooling Device with Spring-Loaded Heat Absorber
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Solution Overview
Problem
Mechanical seals in centrifugal pumps face challenges in heat dissipation due to friction, leading to localized thermal expansion issues that complicate the integration of cooling devices, particularly in areas where installation space is limited and thermal expansion differences between components can disrupt heat transfer.
Innovation Solution
A mechanical seal design featuring a cooling device with a thermally conductive foil spring area for continuous heat absorption and dissipation, where the heat absorption area is directly in contact with the stationary ring, and spring elements ensure constant pressure, minimizing thermal expansion differences and enhancing cooling efficiency through optimized material selection and geometric design.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If a cooling device is integrated directly onto the sealing ring, then cooling efficiency is improved, but thermal expansion differences between components disrupt heat transfer
Solution Approach 1:
The patent applies parameter changes by using spring elements to dynamically adjust the contact pressure between the cooling device and the sealing ring. As thermal expansion occurs, the spring elements automatically adapt their force to maintain optimal thermal contact, compensating for dimensional changes and ensuring stable heat transfer throughout operation.
Solution Approach 2:
The patent introduces spring elements as intermediary components between the cooling device and the sealing ring. These spring elements act as a buffer that accommodates thermal expansion differences while maintaining continuous contact, thereby mediating the thermal connection and preventing disruption of heat transfer due to dimensional changes.
2Temperature
If cooling ribs are provided to increase surface area, then heat dissipation is improved, but device complexity increases
Solution Approach 1:
The patent applies local quality by providing cooling ribs only in specific areas where heat generation is most intense. Rather than uniformly increasing surface area throughout the entire sealing ring, the cooling features are strategically placed at critical thermal zones, thereby improving heat dissipation where needed while minimizing overall structural complexity.
3Temperature
If the heat absorption area is pressed against the second ring with constant force, then thermal contact is improved, but the spring elements must accommodate thermal expansion
Solution Approach 1:
The patent applies dynamics by using spring elements instead of rigid connections between the cooling device and the sealing ring. The spring elements provide a dynamic, adaptable connection that automatically adjusts to thermal expansion and contraction, maintaining constant thermal contact pressure without requiring complex adjustment mechanisms or pre-calculated dimensional compensations.
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 design ensures reliable and efficient cooling of the sealing arrangement by maintaining consistent contact and reducing thermal stresses, allowing for effective heat dissipation even under expansion, thereby protecting the sealing integrity and improving the mechanical seal's performance.
Implementation Method 1
spring elements with at least two transfer points, which permanently press the heat absorption against the second ring
Implementation Method 2
The spring area is formed by a thermally conductive foil. This brings both good thermal conductivity and a sufficient spring effect.
Implementation Method 3
the cooling device provides a first area for heat absorption, which is in direct contact with the second ring
Implementation Method 4
a second area for heat dissipation
Data Source
Figure 1
AI summary
Sealing arrangement, in particular a mechanical seal, wherein the sealing arrangement comprises a first rotating ring (1) and a second fixed ring (2) which are pressed against one another by means of a force, wherein a sealing surface (3) is formed between the first and the second ring (1, 2), wherein a cooling device is provided on the second fixed ring (2), wherein the cooling device has a first region for absorbing heat (4), which is in direct contact with the second ring (2), and a second region for dissipating heat (5), and also spring elements (6) with two transfer points (7) which permanently press the heat absorber (4) against the second ring (2).