Rotor Sealing Bead Structure for Lower Rotational Torque
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Solution Overview
Problem
Existing valve devices with looped seals face challenges in reducing the torque required for rotor rotation, leading to increased energy consumption and potential mechanical stress.
Innovation Solution
A sealing device with a reduction unit on its surface, featuring a sealing bead and auxiliary beads that protrude in the circumferential direction, is used between the rotor and housing to distribute torque peaks and reduce rotational resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a looped seal is used to prevent fluid leakage, then sealing performance is improved, but torque required for rotor rotation increases
Solution Approach 1:
The sealing bead is divided into multiple segments or zones with different properties. The sealing device includes a sealing bead and at least one auxiliary bead that protrude from the sealing bead in the circumferential direction of the rotor, creating segmented contact zones that distribute the sealing force and reduce peak torque
Solution Approach 2:
Different portions of the sealing device have different functional properties. The auxiliary beads are positioned at specific locations on the sealing bead to provide localized torque reduction while maintaining sealing effectiveness in other areas. The sealing bead itself has a specific hardness and elasticity that balances sealing force with torque reduction
2Force
If material with low coefficient of friction is used, then torque required for rotation is reduced, but sealing performance may deteriorate
Solution Approach 1:
The sealing device utilizes the elasticity and hardness parameters of the sealing bead and auxiliary beads to achieve low friction. By carefully selecting the material properties (hardness, elasticity) of the sealing bead, the device reduces friction and torque while maintaining adequate sealing force through the elastic deformation of the beads
Data Source
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AI summary
A sealing device is provided between an outer circumferential surface of a rotatable rotor and an inner circumferential surface of a housing for accommodating the rotor. The sealing device includes: a body having a first surface facing the outer circumferential surface of the rotor, a second surface facing the inner circumferential surface of the housing, and a third opening corresponding to the second opening; a sealing bead on the first surface, the sealing bead surrounding the third opening; and at least one auxiliary bead on the first surface, the at least one auxiliary bead protruding from the sealing bead in a circumferential direction of the rotor.