US 11,988,219 B2
Sealing device and integrated pump
Toru Kuga, Tokyo (JP); and Yasuhiro Ishikawa, Tokyo (JP)
Assigned to IHI Corporation, Koto-ku (JP)
Appl. No. 17/433,488
Filed by IHI Corporation, Koto-ku (JP)
PCT Filed Aug. 2, 2019, PCT No. PCT/JP2019/030514
§ 371(c)(1), (2) Date Aug. 24, 2021,
PCT Pub. No. WO2020/174718, PCT Pub. Date Sep. 3, 2020.
Claims priority of application No. 2019-031403 (JP), filed on Feb. 25, 2019.
Prior Publication US 2022/0136517 A1, May 5, 2022
Int. Cl. F04D 29/10 (2006.01); F02K 9/46 (2006.01); F04D 13/04 (2006.01); F04D 13/14 (2006.01); F04D 29/12 (2006.01); F16J 15/00 (2006.01); F16J 15/3204 (2016.01); F16J 15/40 (2006.01); F16J 15/44 (2006.01); F16J 15/447 (2006.01)
CPC F04D 29/104 (2013.01) [F02K 9/46 (2013.01); F04D 13/14 (2013.01); F04D 29/108 (2013.01); F04D 29/128 (2013.01); F16J 15/002 (2013.01); F16J 15/3204 (2013.01); F16J 15/40 (2013.01); F16J 15/441 (2013.01); F16J 15/4472 (2013.01); F04D 13/043 (2013.01)] 5 Claims
OG exemplary drawing
 
1. An integrated pump, comprising:
a rotary shaft;
an oxidizer impeller, a fuel impeller and a turbine attached to the rotary shaft in this order in an axial direction of the rotary shaft;
a first bearing rotatably supporting the rotary shaft between the oxidizer impeller and the fuel impeller;
a second bearing rotatably supporting the rotary shaft between the fuel impeller and the turbine; and
a first seal device disposed between the first bearing and the fuel impeller; and
a second seal device disposed between the second bearing and the turbine, wherein
each of the first and second seal devices includes:
a plurality of non-contact seals provided along the rotary shaft;
a contact seal provided on at least one of two sides of the plurality of non-contact seals;
an injection part that supplies purge gas into a first space of spaces arranged in the axial direction, the spaces being between the plurality of non-contact seals and the contact seal; and
a collector that collects the purge gas from a second space of the spaces between the plurality of non-contact seals and the contact seal, the second space being positioned next to the first space in the axial direction,
the first bearing, the plurality of non-contact seals of the first seal device, and the contact seal of the first seal device are disposed in this order, and
the second bearing, the plurality of non-contact seals of the second seal device, and the contact seal of the second seal device are disposed in this order.