IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0094298
(2013-12-02)
|
등록번호 |
US-9709172
(2017-07-18)
|
발명자
/ 주소 |
- Sardinskas, Stuart
- Bonito, Matthew
|
출원인 / 주소 |
|
대리인 / 주소 |
|
인용정보 |
피인용 횟수 :
0 인용 특허 :
12 |
초록
▼
A shaft seal assembly for sealing along a rotor shaft is provided. The shaft seal assembly includes a seal housing, annular inner and outer seal members, an annular middle element, and an end plate. The seal housing has a seal member bore and a shaft bore. The annular inner and outer seal members ar
A shaft seal assembly for sealing along a rotor shaft is provided. The shaft seal assembly includes a seal housing, annular inner and outer seal members, an annular middle element, and an end plate. The seal housing has a seal member bore and a shaft bore. The annular inner and outer seal members are configured to be disposed in the seal member bore. The middle element is disposed between the inner seal member and the outer seal member within the seal member bore. The end plate is attached to the seal housing and covers a portion of the seal member bore. The middle element biases the inner seal member against the seal housing and biases the outer seal member against the end plate.
대표청구항
▼
1. A shaft seal assembly for sealing along a rotor shaft, the rotor shaft rotatable about an axis of rotation, the assembly comprising: a seal housing having an interior surface, an exterior surface, an outer radial surface, a seal member bore, and a seal housing shaft bore, the seal housing shaft b
1. A shaft seal assembly for sealing along a rotor shaft, the rotor shaft rotatable about an axis of rotation, the assembly comprising: a seal housing having an interior surface, an exterior surface, an outer radial surface, a seal member bore, and a seal housing shaft bore, the seal housing shaft bore is configured to receive the rotor shaft;an annular inner seal member configured to be disposed in the seal member bore;an annular outer seal member configured to be disposed in the seal member bore;an annular middle element disposed between the inner seal member and the outer seal member within the seal member bore; andan end plate having a an end plate shaft bore, wherein the end plate is attached to the seal housing and covers a portion of the seal member bore, the end plate shaft bore configured to receive the rotor shaft;wherein the middle element biases the inner seal member against the seal housing and biases the outer seal member against the end plate;wherein the annular inner seal member, the annular outer seal member, and the annular middle element are disposed within the seal housing in a manner so as to be substantially non-rotatable relative to the rotor shaft during rotation of the rotor shaft. 2. The shaft seal assembly of claim 1, wherein the seal housing includes at least one fluid port in communication with the seal member bore, the fluid port providing a fluid passage into the seal member bore; and wherein the inner seal member includes a shaft surface disposed proximate an exterior radial surface of the rotor shaft; andwherein the shaft seal assembly is configured to include a fluid path that allows a purge fluid entering the fluid port of the shaft seal assembly to exit the shaft seal assembly between the exterior radial surface of the rotor shaft and the shaft surface of the inner seal member. 3. The shaft seal assembly of claim 2, wherein the inner seal member includes a lip seal for engagement with the rotor shaft. 4. The shaft seal assembly of claim 3, wherein the inner seal member includes one or more fluid passages that permit fluid to pass on one or both sides of a lip of the lip seal. 5. The shaft seal assembly of claim 1, wherein the middle element is an O-ring. 6. The shaft seal assembly of claim 1, wherein the middle element is a ring structure that is elastically compressible in an axial direction. 7. The shaft seal assembly of claim 1, further comprising at least one first anti-rotation member operable to prevent rotation of the inner seal member, and at least one second anti-rotation member operable to prevent rotation of the outer seal member. 8. The shaft seal assembly of claim 7, wherein the inner seal member includes a bore surface having a bore surface cavity, the bore surface cavity having a radial dimension, and the first anti-rotation member extends out from the seal housing and into the bore surface cavity; wherein the first anti-rotation member has a radial dimension, and the first anti-rotation member radial dimension is less than the bore surface cavity radial dimension. 9. The shaft seal assembly of claim 7, wherein the annular outer seal member includes an end plate surface having an end plate surface cavity, the end plate surface cavity having a radial dimension, and the second anti-rotation member extends out from the end plate and into the end plate surface cavity; wherein the second anti-rotation member has a radial dimension, and the second anti-rotation member radial dimension is less than the end plate surface cavity radial dimension. 10. The shaft seal assembly of claim 1, further comprising an inner seal member retention ring disposed around a circumference of the inner seal member, and an outer seal member retention ring disposed around a circumference of the outer seal member. 11. The shaft seal assembly of claim 1, wherein the seal member bore has an inner radial diameter, and the inner seal member has an outer radial diameter, and the outer seal member has an outer radial diameter, and wherein the seal member bore inner radial diameter is greater than the outer radial diameters of the inner seal member and the outer seal member. 12. A continuous mixer, comprising: a housing;at least one rotor shaft operable to be rotated about an axis of rotation within the housing;at least one shaft seal assembly for sealing along the rotor shaft, the shaft seal assembly including a seal housing having an interior surface, an exterior surface, an outer radial surface, a seal member bore, and a seal housing shaft bore, the seal housing shaft bore configured to receive the rotor shaft, an annular inner seal member configured to be disposed in the seal member bore, an annular outer seal member configured to be disposed in the seal member bore, an annular middle element disposed entirely between the inner seal member and the outer seal member within the seal member bore, and an end plate having an end plate shaft bore, wherein the end plate is attached to the seal housing and covers a portion of the seal member bore, the end plate shaft bore configured to receive the rotor shaft, wherein the middle element biases the inner seal member against the seal housing and biases the outer seal member against the end plate, and wherein the annular inner seal member, the annular outer seal member, and the annular middle element are disposed within the seal housing in a manner so as to be substantially non-rotatable relative to the rotor shaft during rotation of the rotor shaft. 13. The continuous mixer of claim 12, wherein the seal housing includes at least one fluid port in communication with the seal member bore, the fluid port providing a fluid passage into the seal member bore; and wherein the inner seal member includes a shaft surface disposed proximate an exterior radial surface of the rotor shaft, and the outer seal member includes a shaft surface disposed proximate the exterior radial surface of the rotor shaft; andwherein the shaft seal assembly is configured to include a fluid path that allows a purge fluid entering the fluid port of the shaft seal assembly to exit the shaft seal assembly between the exterior radial surface of the rotor shaft and the shaft surface of at least one of the seal members. 14. The continuous mixer of claim 12, wherein the inner seal member includes at least one lip seal for engagement with the rotor shaft. 15. The continuous mixer of claim 12, further comprising at least one first anti-rotation member operable to prevent rotation of the inner seal member, and at least one second anti-rotation member operable to prevent rotation of the outer seal member. 16. The continuous mixer of claim 15, wherein the inner seal member includes a bore surface having a bore surface cavity, the bore surface cavity having a radial dimension, and the first anti-rotation member extends out from the seal housing and into the bore surface cavity; wherein the first anti-rotation member has a radial dimension, and the first ant-rotation member radial dimension is less than the bore surface cavity radial dimension. 17. The continuous mixer of claim 16, wherein the outer seal member includes an end plate surface having an end plate surface cavity, the end plate surface cavity having a radial dimension, and the second anti-rotation member extends out from the end plate and into the end plate surface cavity; wherein the second anti-rotation member has a radial dimension, and the second anti-rotation member radial dimension is less than the end plate surface cavity radial dimension. 18. A compact processor, comprising: a frame;a continuous mixer including a housing, at least one rotor shaft operable to be rotated about an axis of rotation within the housing, and at least one shaft seal assembly for sealing along the rotor shaft, the shaft seal assembly including a seal housing having an interior surface, an exterior surface, an outer radial surface, a seal member bore, and a seal housing shaft bore, the seal housing shaft bore configured to receive the rotor shaft, an annular inner seal member configured to be disposed in the seal member bore, an annular outer seal member configured to be disposed in the seal member bore, an annular middle element disposed between the inner seal member and the outer seal member within the seal member bore, and an end plate having an end plate shaft bore, wherein the end plate is attached to the seal housing and covers a portion of the seal member bore, the end plate shaft bore configured to receive the rotor shaft, wherein the middle element biases the inner seal member against the seal housing and biases the outer seal member against the end plate, and wherein the annular inner seal member, the annular outer seal member, and the annular middle element are disposed within the seal housing in a manner so as to be substantially non-rotatable relative to the rotor shaft during rotation of the rotor shaft;an extruder; andan extruder hopper chute extending between the continuous mixer and the extruder. 19. The shaft seal assembly according to claim 1, wherein the annular inner seal member and the annular outer seal member are not in contact with one another. 20. The shaft seal assembly according to claim 1, wherein the middle element axially biases the inner seal member against the seal housing and biases the outer seal member against the end plate, but does not substantially impede radial movement of either the inner seal member or the outer seal member. 21. The shaft seal assembly according to claim 1, wherein the middle element is disposed entirely between the inner seal member and the outer seal member within the seal member bore.
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