Tsinghua University

Pengdong Han

Decai Li

Sijie Ren

Yingsong Li

Xiao Xi Liu

Qian Li

A magnetic liquid sealing device includes a housing, a rotating shaft, a first pole shoe, a second pole shoe, a plurality of permanent magnets, a rotation ring, and a sealing block. A chamber is defined in the housing including a first housing and a second housing. The rotating shaft passes through and is rotatable. The first pole shoe and the second pole shoe surround the rotating shaft and are spaced apart. The plurality of permanent magnets between the first pole shoe and the second pole shoe are spaced apart. The rotation ring surrounds the rotating shaft and is rotatable. The first housing, the rotation ring, and the second housing define the chamber. The rotation ring on outer sides of the plurality of permanent magnets is defined with a through hole running through the rotation ring. The sealing block in the through hole is detachably connected to the rotation ring.

Magnetic liquid sealing device

A magnetic liquid sealing device is provided. The magnetic liquid sealing device includes a housing, a rotating shaft, a pole shoe, a permanent magnet, and a first sealing ring. The rotating shaft is provided with an annular first stop portion, the pole shoe has a first end face and a second end face opposite to each other in an axial direction of the rotating shaft, and the permanent magnet is fitted over the rotating shaft. The first sealing ring is fitted over the rotating shaft, and includes a first part and a second part. The first part is sealedly fitted with at least one of the first end face and an inner peripheral surface of the housing, and an inner end of the second part is a first free end movably arranged along the axial direction of the rotating shaft.

A magnetic fluid damper includes a housing defining a cavity; a plurality of mass blocks located in the cavity and spaced from each other in a first direction; at least one energy dissipating assembly, in which the plurality of mass blocks and the at least one energy dissipating assembly are arranged alternately along the first direction in the cavity, in which each energy dissipating assembly includes a first permanent magnet and a first porous medium member, pores of each first porous medium member being filled with first magnetic fluid; and a plurality of reset parts cooperating with the plurality of mass blocks in one-to-one correspondence to apply restoring forces in a second direction to the mass blocks, in which restoring forces received by two mass blocks adjacent in the first direction are not equal.

Growing community of inventors

Beijing, China

Pengdong Han