Fail safe L-shaped spring carrier for gas seals
AssigneeDresser-Rand Company
InventorPhilippe Jacques Auber
Life of this patent
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Abstract
The present invention relates to a shaft seal (1) comprising a sealing element (14) mounted co-axially to a rotary sealing ring (10) to form a primary seal between opposed faces thereof to substantially prevent fluid flow across the primary seal. The sealing element (14) is urged axially towards the rotary ring (10) by a springs (15) acting between a pusher sleeve (17) connected to the sealing element 14 and a seal housing (19). A secondary seal formed between the pusher sleeve (17) and the housing (19) by a sealing member (20) located in a channel (21) in the pusher sleeve (17).
Claims3
A non-contact shaft seal comprising:
- a seal housing;
- a rotary sealing ring disposed in the seal housing;
- a sealing element mounted coaxially to the rotary sealing ring to form a primary seal between opposed faces thereof for substantially preventing a fluid from flowing across the primary seal from a high-pressure radial side to a low-pressure radial side;
- an L-shaped pusher sleeve slidably coupled to the seal housing, and having biasing means for urging the sealing element axially towards the rotary ring;
- a sealing member disposed in a channel of the pusher sleeve and engaging the seal housing to form a secondary seal;
- and
- a second sealing member disposed between the sealing element and the pusher sleeve to form a tertiary seal.
A non-contact shaft seal comprising:
- a seal housing;
- a rotary sealing ring disposed in the seal housing;
- a sealing element mounted coaxially to the rotary sealing ring to form a primary seal between opposed faces thereof for substantially preventing a fluid from flowing across the primary seal from a high-pressure radial side to a low-pressure radial side;
- an L-shaped pusher sleeve slidably coupled to the seal housing, and having biasing means for urging the sealing element axially towards the rotary ring;
- a sealing member disposed in a channel of the pusher sleeve and engaging the seal housing to form a secondary seal;
- and
- a second sealing member disposed between the sealing element and the pusher sleeve to form a tertiary seal, wherein the second sealing member is disposed in a half dove-tail channel formed in the pusher sleeve.
Dependencies are inferred from the claim text.