US 12,313,076 B2
Multistage fluid compressor
Seong Kook Cho, Daejeon (KR); and Ho Bin Im, Daejeon (KR)
Assigned to HANON SYSTEMS, Daejeon (KR)
Appl. No. 18/283,232
Filed by Hanon Systems, Daejeon (KR)
PCT Filed Mar. 17, 2022, PCT No. PCT/KR2022/003727
§ 371(c)(1), (2) Date Sep. 21, 2023,
PCT Pub. No. WO2022/234946, PCT Pub. Date Nov. 10, 2022.
Claims priority of application No. 10-2021-0059002 (KR), filed on May 7, 2021.
Prior Publication US 2024/0167481 A1, May 23, 2024
Int. Cl. F04D 17/12 (2006.01); F04D 25/06 (2006.01); F04D 29/056 (2006.01); F04D 29/28 (2006.01)
CPC F04D 17/12 (2013.01) [F04D 25/06 (2013.01); F04D 25/0606 (2013.01); F04D 29/056 (2013.01); F04D 29/286 (2013.01)] 13 Claims
OG exemplary drawing
 
1. A multistage fluid compressor comprising:
a motor housing having a fluid injection port formed at one side thereof and configured to communicate with the inside of the motor housing, the motor housing having an inlet flow path formed at one side thereof and configured to communicate with the fluid injection port, and a discharge flow path formed at the other side thereof and configured to communicate with the inside of the motor housing;
a stator provided in the motor housing;
a rotor provided in the motor housing and rotatably coupled to the motor housing;
an impeller housing coupled to the other side of the motor housing, configured to communicate with the inside of the motor housing, and having a fluid discharge port through which a fluid is discharged; and
first and second impellers provided in the impeller housing and coupled to the rotor,
wherein journal bearings are respectively coupled to bearing mounting portions formed at two opposite sides of the motor housing based on an axial direction, the stator has accommodation portions concavely formed radially inward at two opposite ends based on the axial direction, and the bearing mounting portions are partially accommodated in the accommodation portions, and
wherein the stator comprises a core, teeth, insulators configured to surround and insulate the core and the teeth, and coils wound around the teeth and disposed outside the insulators, and the accommodation portions are formed in the insulators.