[특허]Remotely accessible locking system for turbine blades

Siemens Power Corporation, Inc.

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특허 상세정보

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내보내기 페이스북 공유 트위터 공유 카카오톡 공유

Remotely accessible locking system for turbine blades

특허상세정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	B63H-001/20 B63H-001/00
미국특허분류(USC)	416/212.R; 416/214.R
출원번호	US-0959532 (2004-10-06)
등록번호	US-7264448 (2007-09-04)
발명자 / 주소	Garner,Chad Marcus
출원인 / 주소	Siemens Power Corporation, Inc.
인용정보	피인용 횟수 : 10 인용 특허 : 7

초록
▼

Embodiments of the invention relate to an axial locking system for a row of blades in a turbine engine. While achieving the desired axial restraint, the system is configured to allow remote manipulation of the locking system. For example, a locking system provided on the upstream side of a row of blades can be accessed from the downstream side of the blades. Such a system can provide significant cost savings during the installation and removal of the blades. In one embodiment, the axial locking system can include a plate with a rotatable cam. Cooperating with the disc, the cam can be rotated to bring the radially outer end of the plate into locking engagement with the turbine blades. The cam can be manipulated from the other side of the disc by a tool extending through a passage formed between the disc and the blade root.

대표
청구항
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What is claimed is: 1. A locking plate assembly for axially restraining a turbine component comprising: a turbine blade; a plate having a first side and a second side, wherein an opening extends through the plate from the first side to the second side; a cam including a cam body and a cam shaft extending from the cam body, the cam body being disposed on the first side of the plate, the cam body being rotatably connected to the plate by engagement between the cam shaft and the opening, the cam shaft defining an axis of rotation of the cam body that is offset from the center of the cam body, a portion of the cam being accessible from the second side of the plate, wherein the accessible portion of the cam is adapted for engagement by a tool, wherein turning of the accessible portion of the cam causes the cam body to rotate about the axis of rotation; and a locking member disposed between the cam body and the plate, whereby the locking member impedes undesired movement of the cam. 2. The assembly of claim 1 wherein the opening in the plate is threaded and the cam shaft is threaded, wherein the cam body is rotataby connected to the plate by threaded engagement between the cam shaft and the opening. 3. The assembly of claim 1 wherein the cam shaft extends from the cam body to an end, wherein the end of the cam shaft is the accessible portion of the cam. 4. The assembly of claim 1 wherein the accessible portion of the cam includes one of a flat head slot, a Phillips head recess, a socket head recess, a hex head recess, an Allen head recess, and a protrusion. 5. A turbine blade axial locking system comprising: a turbine blade; a disc having an axial upstream side and an axial downstream side, the disc being adapted for receiving at least a portion of the turbine blade such that a substantially axial passage is formed between the blade and the disc, the passage being open at both ends; and a plate having an inner face and an outer face, the plate positioned on one side of the disc such that the inner face of the plate faces the disc; a cam including a cam body provided on the outer face of the plate, the cam body being rotatably connected to the plate, the cam body having an axis of rotation that is offset from the center of the cam body, the cam body engaging a portion of the disc such that the plate is movable into and out of locking engagement with the blade, wherein, for all travel positions of the cam body, a sufficient portion of the cam is accessible from the inner face of the plate within an area defined by superimposing the passage onto the inner face of the plate, whereby an elongated tool inserted into the passage from the side of the disc opposite the side on which the plate is positioned can engage the sufficient portion of the cam so as to rotate the cam body. 6. The system of claim 5 further including a locking member disposed between the plate and the cam body, whereby unwanted movement of the cam is substantially impeded by the locking member. 7. The assembly of claim 5 wherein the cam body includes a rounded portion and a flat portion, wherein the axis of rotation of the cam body is located closer to the rounded portion than the flat portion of the cam body. 8. The system of claim 5 wherein the blade includes at least a platform portion and a root portion, wherein the plate lockingly engages the platform portion of the blade. 9. The system of claim 8 wherein the platform portion provides a slot for receiving the plate. 10. The system of claim 5 wherein the accessible portion of the cam is adapted for engagement by a tool. 11. The system of claim 5 wherein the accessible portion of the cam includes one of a flat head slot, a Phillips head recess, a socket head recess, a hex head recess, an Allen head recess, and a protrusion. 12. The system of claim 5 wherein the plate includes a threaded opening extending between the outer face and the inner face of the plate, and wherein a threaded cam shaft extends from the cam body and into threaded engagement with the threaded opening, whereby the cam body rotates relative to the plate by threaded engagement between the cam shaft and the opening. 13. The system of claim 12 wherein the cam shaft extends from the cam body to an end, wherein the end of the cam shaft is accessible from the inner face of the plate. 14. The system of claim 13 wherein the end of the cam shaft is adapted for engagement by a tool. 15. The system of claim 5 wherein, when the plate lockingly engages the blade, a portion of the opposite end of the plate abuts a portion of the disc. 16. A method of accessing turbine blades comprising: providing a turbine blade and a disc, the disc having an axial upstream side and an axial downstream side, the disc being adapted for receiving at least a portion of the turbine blade such that a substantially axial passage is formed between the blade and the disc; providing a plate having an inner face and an outer face, the plate positioned on one side of the disc such that the inner face of the plate faces the disc, providing a cam including a cam body disposed on the outer face of the plate, the cam body being rotatably connected to the plate, the cam body having an axis of rotation that is offset from the center of the cam body, the cam body engaging a portion of the disc such that the plate is movable into and out of locking engagement with the blade, wherein, for all travel positions of the cam body, a sufficient portion of the cam is accessible from the inner face of the plate within an area defined by superimposing the passage onto the inner face of the plate; inserting an elongated tool into the passage from the side of the disc opposite the side on which the plate is positioned; and engaging the accessible portion of the cam with the tool. 17. The method of claim 16 further including the step of rotating the cam body with the tool so as to move the plate into locking engagement with the blade. 18. The method of claim 16 further including the step of rotating the cam body with the tool so as to move the plate out of locking engagement with the blade. 19. The method of claim 18 further including the step of holding the plate during the step of rotating the cam body. 20. The method of claim 18 further including the step of removing the blade by moving the blade axially toward the side of the disc opposite the side on which the plate is positioned. 21. The assembly of claim 1, wherein rotating the accessible portion of the cam causes the plate to translate in a radial direction.

이 특허에 인용된 특허 (7)

이 특허를 인용한 특허 (10)

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특허 상세정보

Remotely accessible locking system for turbine blades

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이 특허에 인용된 특허 (7)

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특허 상세정보

Remotely accessible locking system for turbine blades

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이 특허에 인용된 특허 (7)

이 특허를 인용한 특허 (10)

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IPC 상세정보(version : 201201)

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