Rotary kinetic fluid motors or pumps – Bearing – seal – or liner between runner portion and static part – Means to seal radial flow pump runner inlet from outlet
Patent
1998-06-23
2000-03-21
Verdier, Christopher
Rotary kinetic fluid motors or pumps
Bearing, seal, or liner between runner portion and static part
Means to seal radial flow pump runner inlet from outlet
4151734, 4151735, 4151744, 4151745, 415230, F04D 2908, F04D 2910, F04D 2916
Patent
active
060395354
ABSTRACT:
In a fluid machine such as multistage centrifugal compressor, the pressure of a working fluid is raised with the rotation of a impeller. A shaft sealing device is mounted at the end of the rotary shaft in order to prevent the working gas of the raised pressure from leaking out of the fluid machine and then polluting the surroundings. In a case where the fluid machine operates to rotate at high speed, a labyrinth sealing device is employed for the purpose of reducing a frictional loss in the shaft sealing device. The labyrinth sealing device includes a plurality of stages of labyrinth fins which are formed on a casing or the rotary shaft, and a layer of abradable coating to-be-bitten which is formed in the surface part of the rotary shaft or the casing opposing to the labyrinth fins. The clearances between the labyrinth fins and the rotary shaft or the casing are made narrower on the low-pressure side of the labyrinth sealing device than on the high-pressure side thereof. Thus, the fluid machine is run with the minimum clearance. Moreover, even when the coating layer has been lost in contacting the labyrinth fin or by peeling off, the labyrinth fin on the low-pressure side acts as a labyrinth seal.
REFERENCES:
patent: 3092306 (1963-06-01), Eder
patent: 3339933 (1967-09-01), Foster
patent: 3723165 (1973-03-01), Longo et al.
patent: 4057362 (1977-11-01), Schwaebel
patent: 4060250 (1977-11-01), Davis et al.
patent: 4405284 (1983-09-01), Albrecht et al.
patent: 4909706 (1990-03-01), Bergsten et al.
patent: 4999225 (1991-03-01), Rotolico et al.
patent: 5126205 (1992-06-01), Chon et al.
patent: 5153021 (1992-10-01), Litchfield et al.
patent: 5211535 (1993-05-01), Martin et al.
patent: 5599026 (1997-02-01), Sanders et al.
patent: 5890873 (1999-04-01), Willey
Development of High-Speed High-Performance Compressor, Mitsubishi Heavy Industries Technical Review, vol. 23, No. 5 (1986-9), 7 pages.
Modifying Compressors at Ethylene Plant for Increasing Capacity and Saving Energy; Proceedings of Ebara, No. 154 (1992-1), 7 pages.
Eino Takashi
Kobayashi Hiromi
Miura Haruo
Nishida Hideo
Takahashi Kazuki
Hitachi , Ltd.
Verdier Christopher
LandOfFree
Labyrinth sealing device, and fluid machine providing the same does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Labyrinth sealing device, and fluid machine providing the same, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Labyrinth sealing device, and fluid machine providing the same will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-725467