US 11,674,600 B2
Assembly, more particularly turbomachine, comprising a shaft seal device
Rainer Gausmann, Duisburg (DE)
Assigned to Siemens Energy Global GmbH & Co., KG, Munich (DE)
Appl. No. 17/57,655
Filed by Siemens Energy Global GmbH & Co. KG, Munich (DE)
PCT Filed Apr. 29, 2019, PCT No. PCT/EP2019/060876
§ 371(c)(1), (2) Date Nov. 21, 2020,
PCT Pub. No. WO2019/228729, PCT Pub. Date Dec. 5, 2019.
Claims priority of application No. 18175111 (EP), filed on May 30, 2018.
Prior Publication US 2021/0199198 A1, Jul. 1, 2021
Int. Cl. F16J 15/43 (2006.01); F01D 11/04 (2006.01); F16J 15/447 (2006.01)
CPC F16J 15/43 (2013.01) [F01D 11/04 (2013.01); F16J 15/447 (2013.01); F05D 2240/55 (2013.01)] 6 Claims
OG exemplary drawing
 
1. An assembly, comprising:
a shaft, which extends along an axis,
a shaft seal device for sealing an annular gap between the shaft and a stator in order to seal a process fluid chamber in relation to the environment,
wherein the shaft seal device comprises a ferrofluid shaft seal,
wherein, at the process fluid chamber, the shaft seal device comprises a first shaft seal in addition to the ferrofluid shaft seal,
wherein the ferrofluid shaft seal is arranged at the annular gap axially between the first shaft seal and the environment and comprises a magnet comprising a pole, and ferrofluid between the pole and a surface of the shaft,
wherein a pressure sink is provided at the annular gap axially between the first shaft seal and the ferrofluid shaft seal,
wherein the assembly comprises a ferrofluid storage container, in which the ferrofluid is stored, and wherein the ferrofluid storage container is connected to the ferrofluid shaft seal by a supply line and a discharge line,
wherein the assembly comprises at least one bearing that supports the shaft via an oil film comprising the ferrofluid between the shaft and the at least one bearing, and
wherein the assembly comprises a conditioning system that supplies the ferrofluid at a first pressure to the ferrofluid shaft seal via the supply line and that supplies the ferrofluid to the at least one bearing as a lubricant via a lubricant supply line and at a second pressure that is different from the first pressure.