Shaft seal for a transmission expander or compressor, and...

Details Shaft seal for a transmission expander or compressor, and... Shaft seal for a transmission expander or compressor, and...

2006-08-28

2008-09-16

Nguyen, Ninh H (Department: 3745)

Rotary kinetic fluid motors or pumps

With lubricating, sealing, packing or bearing means having...

For shaft sealing, packing, lubricating or bearing means

C415S230000, C415S174500

Reexamination Certificate

active

07425114

ABSTRACT:
A shaft seal for a transmission expander or compressor having at least one rotor which rotates in a housing and is arranged in a floating manner on a shaft, the shaft seal having a seal arrangement with seal tips attached on the hub of the rotor. A stationary sealing ring surrounds the seal tips which are arranged in three seal sections. An annular chamber is arranged between in each adjacent pair of seal sections. The annular chamber which faces the interior of the transmission expander or compressor is equipped with a feed means for a sealing gas, the pressure of which is higher than the pressure in the interior of the transmission expander or compressor. The annular chamber which faces away from the interior of the transmission expander or compressor is provided with an extraction means for the sealing gas.

REFERENCES:
patent: 3966351 (1976-06-01), Sproule
patent: 4193603 (1980-03-01), Sood
patent: 6330790 (2001-12-01), Arora et al.
patent: 6969231 (2005-11-01), Ghasripoor et al.

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