Split Baffle Sleeve for Mechanical Seal Preassembly
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Solution Overview
Problem
Existing mechanical seals for high-temperature applications require complex onsite assembly of baffle sleeves, leading to increased assembly steps and potential human errors, and result in material wastage due to the machining of one-piece L-shaped baffle sleeves from round bars.
Innovation Solution
A mechanical seal design where the baffle sleeve is split into a flange part and a cylinder part, allowing for preassembly of all components at a factory or service center, reducing assembly complexity and material wastage, and featuring a slit, bolt holes, and tapered surfaces for secure engagement and vibration damping.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If a one-piece L-shaped baffle sleeve is used, then the structural integrity is improved, but the assembly complexity and onsite installation difficulty increase
Solution Approach 1:
The baffle sleeve is divided into two separate parts: a cylindrical part and a flange part. The cylindrical part can be pre-assembled with the bellows and other seal members at the factory, while the flange part is installed separately on the equipment exterior side. This segmentation reduces onsite assembly complexity while maintaining structural integrity through precise mating features.
2Strength
If a one-piece L-shaped baffle sleeve is machined from a round bar, then the structural strength is improved, but material wastage increases
Solution Approach 1:
The baffle sleeve is segmented into a cylindrical part and a flange part that can be manufactured separately using optimized processes. The cylindrical part can be manufactured with minimal waste from a round bar, while the flange part can be manufactured using sheet metal or casting processes that are more material-efficient. This eliminates the excessive material removal required to machine a one-piece L-shaped structure.
3Productivity
If all seal members are pre-assembled at the factory, then the productivity is improved, but the device complexity increases
Solution Approach 1:
The seal assembly is divided into modular sections that can be pre-assembled to different degrees. The cylindrical part of the baffle sleeve can be pre-assembled with the bellows and seal members at the factory, while the flange part is designed for simple onsite installation. This modular approach enables factory preassembly to improve productivity without creating excessive complexity, as each module maintains a manageable level of complexity.
Data Source
Figure 1
Figure 2
Figure 3(a)~3(b)
AI summary
{Technical Problem} Provide a mechanical seal that allows for preassembly of its seal members on the stationary side, baffle sleeve, damper, and other related parts at a factory, service center, etc., in a reliable and controlled manner, thereby requiring fewer assembly steps during onsite engineering works. {Solution to Problem} The mechanical seal has a seal ring 9 and a mating ring 10 that faces and slides against the seal ring 9 and either the seal ring 9 or mating ring 10 is supported via a bellows 7 on the equipment interior side of a seal cover 2 installed on a housing 1, while the other rotates together with a rotational shaft 3; and a baffle sleeve 17 or 37 with a roughly L-shaped cross-section is fixed on the equipment exterior side of the seal cover 2 to guide quenching liquid to the sliding surfaces of the seal ring 9 and mating ring 10, where the baffle sleeve 17 or 37 is structurally split into a flange part 21 or 38 and cylinder part 22 or 38.