US 12,438,411 B2
Magnetic fluid sealed shaft assembly, shielded motor, and shielded pump
Jie Han, Shenyang (CN); Ailiang Han, Shenyang (CN); and Yutong Wang, Shenyang (CN)
Assigned to SHENYANG ANTI-CORROSION ALLOY PUMP CO., LTD., Shenyang (CN)
Appl. No. 18/269,618
Filed by Shenyang Anti-Corrosion Alloy Pump CO., LTD., Shenyang (CN)
PCT Filed Dec. 23, 2021, PCT No. PCT/CN2021/140769
§ 371(c)(1), (2) Date Jun. 26, 2023,
PCT Pub. No. WO2022/135512, PCT Pub. Date Jun. 30, 2022.
Claims priority of application No. 202011559309.6 (CN), filed on Dec. 25, 2020; and application No. 202111554050.0 (CN), filed on Dec. 17, 2021.
Prior Publication US 2024/0063681 A1, Feb. 22, 2024
Int. Cl. H02K 5/124 (2006.01); F04D 29/10 (2006.01); F16J 15/43 (2006.01)
CPC H02K 5/124 (2013.01) [F04D 29/10 (2013.01); F16J 15/43 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A magnetic fluid sealed shaft assembly, comprising:
a housing in which an accommodating cavity is provided, the accommodating cavity being provided with a fixed structure on an inner wall;
a rotating shaft supported and mounted in the accommodating cavity;
a magnetic fluid sealing device which is located in the accommodating cavity and is sleeve mounted on the rotating shaft, wherein the housing is provided with space for runout of the magnetic fluid sealing device following the rotating shaft and/or adjustment of a mounting angle and position according to a mounting state of the rotating shaft; and
a resilient member which is hermetically connected to both the magnetic fluid sealing device and the fixed structure, wherein after the magnetic fluid sealing device is resiliently and hermetically connected to the fixed structure by the resilient member, the magnetic fluid sealing device is configured to runout following the rotating shaft and/or adjust the mounting angle and position according to the mounting state of the rotating shaft; wherein
the fixed structure is provided on an inner side wall of the housing, or the fixed structure is mounted on an end portion structure located on the housing; and/or
a radial spacing is provided between the magnetic fluid sealing device and the fixed structure, and an axial spacing is provided between the housing and two ends of the magnetic fluid sealing device; and
the resilient member is a resilient connecting barrel that comprises a sleeve part and a mounting part, the sleeve part sleeving and being mounted on the magnetic fluid sealing device, and the mounting part being provided on the sleeve part and sealedly and fixedly connected to the fixed structure,
wherein the sleeve part and the mounting part are of a one-piece structure, a radial spacing is provided between the sleeve part and the fixed structure, and an axial spacing is provided between the housing and two ends of the magnetic fluid sealing device.