High-speed magnetic fluid sealing device for high-temperature working condition

Abstract

The invention relates to the technical field of magnetic fluid sealing, in particular to a high-speed magnetic fluid sealing device for a high-temperature working condition. The high-speed magnetic fluid sealing device comprises a sealing shell, a rotating shaft rotatably connected to the interior of the sealing shell, a fixed magnetic assembly fixedly connected to the inner wall of the sealing shell, and a rotating magnetic assembly fixedly connected to the outer wall of the middle of the rotating shaft in a sleeved mode; a magnetic fluid channel communicated with the rotating magnetic assembly is arranged in the rotating shaft, and a one-way check valve is arranged at an inlet end of the magnetic fluid channel; the fixed magnetic assembly comprises a magnetic conductive plate fixedly connected to the inner wall of the sealing shell; the joint face of the rotating magnetic assembly and the fixed magnetic assembly is magnetically connected with magnetic fluid; a temperature sensor and a springback displacement sensor assembly are arranged on the inner wall of the magnetic conductive plate; and a cooling part is arranged in the sealing shell. The purpose that the magnetic fluid sealing device can still work normally under the high-temperature working condition can be achieved.

Description

technical field [0001] The invention relates to the technical field of magnetic fluid sealing, in particular to a high-speed magnetic fluid sealing device used in high temperature working conditions. Background technique [0002] Magnetic fluid is a new type of functional material composed of base carrier liquid, magnetic solid particles, and dispersant. It is widely used in various fields such as lubrication, sealing, vibration reduction, and heat transfer, especially in the field of sealing. As a "non-contact" sealing technology, the magnetic fluid seal is widely used due to its low friction, high transmission efficiency, excellent sealing performance, simple structure, high reliability, and long service life. The use under extreme working conditions is still very limited. Because the base carrier fluid, one of the components of the magnetic fluid, volatilizes under high-temperature conditions, causing the magnetic fluid to be destroyed. Under high-speed conditions, the m...

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Problems solved by technology

As a "non-contact" sealing technology, the magnetic fluid seal is widely used due to its low friction, high transmission efficiency, excellent sealing performance, simple structure, high reliability, and long service life. Use in extreme conditions is still very limited

Because the base carrier fluid, one of the components of the magnetic fluid, volatilizes under high-temperature conditions, causing the magnetic fluid to be destroyed. Under high-speed conditions, the magnetic fluid will be thrown away from the surface of the rotating shaft due to the influence of centrifugal force, resulting in a decrease in the magnetic fluid near the surface of the rotating shaft. Reduced sealing performance and frictional heat at high speeds

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