Design and software simulation of a large gap rotary seal structure of magnetic liquid in a marine environment

For the topic of this paper, there are problems such as a large sealing gap (about 0.7 mm), a large size (maximum shaft diameter is about 700 mm), difficult assembly, harsh sealing environment conditions, special sealing structure, and special sealing medium materials in high-power motor sealing sealing. It is difficult to meet the requirements by using traditional sealing methods. This paper uses a new functional material, a magnetic liquid, to seal the high-power motor in combination with magnetic grease, to solve the above problems, and successfully applies magnetic liquid to the field of navigation operations of large ships and expands its application fields. In order to solve the sealing problem of the cooling and evaporating medium of the large air volume fan in the large ship equipment, a five-stage, twenty-tooth, large-gap magnetic fluid and magnetic grease combined rotary sealing device is designed, which is suitable for the environment with high rolling and high corrosion of large ships.