Carbon face seal
AssigneeRtx Corporation
InventorsJacob Peter Mastro, Andrew V. Schwendenmann
Life of this patent
Estimating the term…
Abstract
An apparatus has: a first member (120); a shaft (40; 50) rotatable relative to the first member about an axis; and a seal system (100). The seal system has a seal carrier (150) having: an axially-extending wall (156) having an inner diameter (ID) surface (160); and a radially-extending wall (154) having a first surface (158). A seal (102) is carried by the first member and has: an outer diameter (OD) surface (206); and a seal face (106). A seat (104) is carried by the shaft and has a seat face (108) in sliding sealing engagement with the seal face. One or more springs (132) bias the seal carrier relative to the first member so as to bias the seal face against the seat face. A key (240; 280; 300; 338) spans an interface between the seal carrier and the seal.
Claims21
An apparatus comprising:
- a first member;
- a shaft rotatable relative to the first member about an axis;
- and
- a seal system comprising:
- a seal carrier having:
- an axially-extending wall having an inner diameter surface;
- and
- a radially-extending wall having a first surface;
- a seal carried by the seal carrier in a radial interference fit with the seal carrier axially-extending wall inner diameter surface and having:
- an outer diameter surface;
- and
- a seal face;
- a seat carried by the shaft and having a seat face in sliding sealing engagement with the seal face;
- and
- one or more springs biasing the seal carrier relative to the first member so as to bias the seal face against the seat face,
- wherein:
- a key spans an interface between the seal carrier and the seal;
- the key has:
- a first portion in a through-hole in the seal carrier axially-extending wall;
- a second portion in a hole in the seal carrier axially-extending wall;
- and
- a third portion in a circumferentially-extending channel formed by respective grooves in the seal carrier and seal and joining the first portion to the second portion.
An apparatus comprising:
- a first member;
- a shaft rotatable relative to the first member about an axis;
- and
- a seal system comprising:
- a seal carrier having:
- an axially-extending wall having an inner diameter surface;
- and
- a radially-extending wall having a first surface;
- a seal carried by the seal carrier in a radial interference fit with the seal carrier axially-extending wall surface and having:
- an outer diameter surface;
- and
- a seal face;
- a seat carried by the shaft and having a seat face in sliding sealing engagement with the seal face;
- and
- one or more springs biasing the seal carrier relative to the first member so as to bias the seal face against the seat face,
- wherein:
- a key spans an interface between the seal carrier and the seal;
- and
- the key has:
- a first portion in a through-hole in the seal carrier axially-extending wall;
- a second portion in an axially-extending channel formed by respective grooves in the seal carrier axially-extending wall inner diameter surface and seal outer diameter surface;
- and
- a third portion in a circumferentially-extending channel formed by respective grooves in the seal carrier and seal and joining the first portion to the second portion.
An apparatus comprising:
- a first member;
- a shaft rotatable relative to the first member about an axis;
- and
- a seal system comprising:
- a seal carrier having:
- an axially-extending wall having an inner diameter surface;
- and
- a radially-extending wall having a first surface;
- a seal carried by the seal carrier in a radial interference fit with the seal carrier axially-extending wall inner diameter surface and having:
- an outer diameter surface;
- and
- a seal face;
- a seat carried by the shaft and having a seat face in sliding sealing engagement with the seal face;
- and
- one or more springs biasing the seal carrier relative to the first member so as to bias the seal face against the seat face,
- wherein:
- a key spans an interface between the seal carrier and the seal;
- the key comprises a metallic pin;
- the metallic pin has a shaft having:
- an outboard portion in a through-hole in the seal carrier;
- an inboard portion in a hole in the seal;
- and
- a lateral protrusion backlocked against the seal carrier to resist outward displacement.
Dependencies are inferred from the claim text.