초록 ▼

In a gas turbine having a chordal hinge seal between an inner rail of each nozzle segment and an annular axially facing sealing surface of a nozzle support ring, a flexible supplemental seal is disposed between the support ring and inner band of the nozzle segment radially inwardly of the chordal hi

In a gas turbine having a chordal hinge seal between an inner rail of each nozzle segment and an annular axially facing sealing surface of a nozzle support ring, a flexible supplemental seal is disposed between the support ring and inner band of the nozzle segment radially inwardly of the chordal hinge seal. To minimize or prevent leakage flow across the chordal hinge seal, the flexible seal extends between the inner rail and the sealing surface of the support ring radially inwardly of the chordal hinge seal. A first margin of the flexible seal engages in a linear groove carried by the inner rail. The opposite margin extends arcuately in sealing engagement with the nozzle support ring.

대표청구항 ▼

In a gas turbine having a chordal hinge seal between an inner rail of each nozzle segment and an annular axially facing sealing surface of a nozzle support ring, a flexible supplemental seal is disposed between the support ring and inner band of the nozzle segment radially inwardly of the chordal hi

In a gas turbine having a chordal hinge seal between an inner rail of each nozzle segment and an annular axially facing sealing surface of a nozzle support ring, a flexible supplemental seal is disposed between the support ring and inner band of the nozzle segment radially inwardly of the chordal hinge seal. To minimize or prevent leakage flow across the chordal hinge seal, the flexible seal extends between the inner rail and the sealing surface of the support ring radially inwardly of the chordal hinge seal. A first margin of the flexible seal engages in a linear groove carried by the inner rail. The opposite margin extends arcuately in sealing engagement with the nozzle support ring. ember adjoining said belt for spacing said separating member and said belt; and a collar support member rotatable around a shaft, said collar support member supporting the spacing member and being driven in conjunction with the belt, wherein said spacing member includes a pair of rotatable members positioned at both sides of the belt in a widthwise direction and when said collar support member rotates around the shaft, the rotatable members also rotate around the shaft such that the spacing member automatically spaces said belt and said separating member from each other in conjunction with rotation of said belt when a single sheet is conveyed from a nip between said belt and said separating member to a preselected position downstream of said nip in a direction of sheet feed. 2. The device as claimed in claim 1, further comprising biasing means for biasing said feeding means and said spacing member toward said separating member. 3. The device as claimed in claim 2, wherein said feeding means and said spacing member are constructed integrally with each other. 4. The device as claimed in claim 1, wherein when the sheet is fully separated and fed, a space formed between said belt and said separating member by said spacing member is canceled. 5. The device as claimed in claim 1, wherein, upon completion of one rotation of said rotatable members around the shaft, said pair of rotatable members space said separating member and said belt one time. 6. The device as claimed in claim 1, wherein when a single sheet is conveyed from the nip between said belt and said separating member to said preselected position, only said belt or said belt and said separating member stop being driven while said spacing member spaces said belt and said separating member from each other. 7. The device as claimed in claim 2, wherein a said shaft about which said separating member is rotatable and a shaft about which said belt is angularly moved away from said spacing member comprise a single shaft. 8. The device as claimed in claim 7, further comprising a cam connected to said spacing member and driven by said single shaft, wherein said spacing member and said belt are angularly moved away from said separating member in accordance with a rotation of said cam. 9. The device as claimed in claim 8, wherein said cam comprises a pair of cams positioned at both sides of said belt. 10. The device as claimed in claim 8, wherein said cam is formed with a notch at a position where said cam and a unit including said belt rotate in contact with each other and space said belt from said separating member. 11. The device as claimed in claim 8, further comprising a stepping motor for causing said cam to rotate, wherein when said cam stops after spacing said spacing member and said belt from said separating member, said stepping motor stops rotating in an excited state. 12. The device as claimed in claim 8, wherein a nip angle at which said belt and said separating member contact each other is variable in accordance with a position where said cam stops. 13. The device as claimed in claim 7, further comprising: a sheet tray; a feeding member selectively movable into or out of contact with a sheet stack set on said sheet tray; and up-and-down interlocking means for interlocking an up-and-down movement of said feeding member and an angular movement for spacing said belt from said separating member. 14. The device as claimed in claim 7, further comprising: a restricting member mounted on said single shaft and selectively movable into or out of contact with a sheet tray on which a sheet stack is set for causing, when brought into contact with said sheet tray, a leading edge of said sheet stack to abut against said restricting member to thereby prevent said sheet stack from moving to a position downstream of a preselected position on said sheet tray in the direction of sheet feed; and a restriction interlocking member for interlocking a movement of said restricting