Magnetic Liquid Seal Modules With Alternating Cooling Cycles
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Solution Overview
Problem
Magnetic liquids in traditional devices experience temperature increase due to continuous shear without effective cooling, affecting service life and pressure-resistant capacity.
Innovation Solution
A device with modular structures comprising first and second modules, each with pole-shoes and electromagnets, allows magnetic liquid to alternate between sealing and cooling positions based on electromagnet direction, using a control unit to manage magnetic fields for heat dissipation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If magnetic liquid is continuously filled in the sealing space during rotary shaft rotation, then sealing function is maintained, but temperature increases due to continuous shear without cooling period
Solution Approach 1:
The patent applies periodic action by using a magnetic field generating device to periodically change the magnetic field state, causing the magnetic liquid to alternately gather and disperse. This creates periodic sealing and cooling cycles, allowing the magnetic liquid to dissipate heat during non-sealing periods while maintaining sealing function when needed.
Solution Approach 2:
The patent implements dynamics by making the magnetic liquid's distribution dynamic rather than static. The magnetic field generating device dynamically adjusts the magnetic field to control the magnetic liquid's gathering and dispersing behavior, enabling the sealing structure to adapt between sealing mode and cooling mode during rotation.
2Reliability
If magnetic liquid is continuously sheared during rotation, then sealing is maintained, but service life decreases due to temperature increase
Solution Approach 1:
The magnetic field generating device creates periodic cycles where the magnetic liquid alternates between gathering (sealing phase) and dispersing (cooling phase). This periodic action reduces continuous shear heating, allowing the magnetic liquid to cool down periodically, thereby extending service life while maintaining sealing capability during the gathering phases.
3Reliability
If magnetic liquid is continuously sheared during rotation, then sealing is maintained, but pressure-resistant capacity decreases due to temperature increase
Solution Approach 1:
The patent uses periodic magnetic field activation to create alternating sealing and cooling cycles. During the cooling phase when magnetic liquid disperses, heat is dissipated, preventing temperature-related degradation of pressure-resistant capacity. The sealing function is restored during the gathering phase, maintaining overall reliability.
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
Ensures continuous cooling and heat dissipation of magnetic liquid, preventing excessive temperature rise and maintaining device performance.
Implementation Method 1
the control unit is configured to provide a first electric current for magnetizing the first electromagnet in a first direction... the control unit is configure to provide a second electric current for magnetizing the second electromagnet in a second direction
Implementation Method 2
allowing for cooling and heat dissipating
Data Source
AI summary
Provided is a device sealed with a magnetic liquid. The device includes: a rotary shaft, a tank body, a control unit, a first module, a second module, a magnetic liquid, and a pole-tooth. The first module and the second module are in the same configuration, each consists of an outer shell, a left pole-shoe, an electromagnet, a control wiring, a right pole-shoe, and a circlip. The device includes at least two modular structures; the control unit controls a first electromagnet and a second electromagnet to be magnetized to alternately bear a sealing role.