US 11,746,827 B2
Steam leakage compact bearing
Franz Pawellek, Lautertal (DE); and Marcel Berner, Hildburghausen (DE)
Assigned to NIDEC GPM GmbH, Auengrund Ot Merbelsrod (DE)
Appl. No. 17/766,012
Filed by NIDEC GPM GmbH, Auengrund OT Merbelsrod (DE)
PCT Filed Aug. 3, 2020, PCT No. PCT/EP2020/071771
§ 371(c)(1), (2) Date Apr. 1, 2022,
PCT Pub. No. WO2021/069125, PCT Pub. Date Apr. 15, 2021.
Claims priority of application No. 102019126968.7 (DE), filed on Oct. 8, 2019.
Prior Publication US 2022/0325756 A1, Oct. 13, 2022
Int. Cl. F16C 33/10 (2006.01); F16C 33/74 (2006.01); F04D 29/10 (2006.01); F04D 29/046 (2006.01); F04D 29/06 (2006.01)
CPC F16C 33/743 (2013.01) [F04D 29/0462 (2013.01); F04D 29/061 (2013.01); F04D 29/108 (2013.01); F16C 33/104 (2013.01); F16C 2360/44 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A shaft bearing having a sealing arrangement for radially mounting and sealing a shaft inside a housing of a coolant pump between a coolant side and an air side, comprising:
a rotatory bearing portion for rotatably mounting the shaft;
a primary radial seal for sealing a shaft circumference to the coolant side;
a secondary radial seal for sealing a shaft circumference to the air side; and
an oil chamber that takes in a volume of a lubricating oil; wherein
a grease chamber surrounding a shaft circumference and receiving a volume of a lubricating grease having a higher viscosity than the lubricating oil and the coolant is arranged between the primary radial seal and the rotatory bearing portion; wherein
a volume compensator including a compressible material is provided for compensating a temperature-dependent volume variation and is arranged such that the volume compensator interacts with the volume of the lubricating oil and the volume of the lubricating grease.