IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0266268
(2010-05-19)
|
등록번호 |
US-8678742
(2014-03-25)
|
우선권정보 |
DE-10 2009 023 061 (2009-05-28) |
국제출원번호 |
PCT/DE2010/000570
(2010-05-19)
|
§371/§102 date |
20111026
(20111026)
|
국제공개번호 |
WO2010/136018
(2010-12-02)
|
발명자
/ 주소 |
|
출원인 / 주소 |
|
대리인 / 주소 |
Barlow, Josephs & Holmes, Ltd.
|
인용정보 |
피인용 횟수 :
1 인용 특허 :
7 |
초록
▼
The invention relates to a clearance control system for adjusting a running clearance (L) between a rotor (12) having rotor blades (10) of a turbomachine (14), especially a gas turbine, and a casing (18) that surrounds at least sections thereof and comprises at least two segments (16a-d), the cleara
The invention relates to a clearance control system for adjusting a running clearance (L) between a rotor (12) having rotor blades (10) of a turbomachine (14), especially a gas turbine, and a casing (18) that surrounds at least sections thereof and comprises at least two segments (16a-d), the clearance control system having at least one adjusting device (20), which can be coupled to at least one segment (16a-d) of the casing (18), and by means of which the at least one segment (16a-d) can be moved radially in relation to a rotational axis (D) of the rotor (12) for adjusting the running clearance (L), wherein each segment (16a-d) of the casing (18) is coupled to at least three adjusting devices (20) of the clearance control system. The invention also relates to a turbomachine (14), especially a gas turbine, as well as to a method for adjusting a running clearance (L).
대표청구항
▼
1. A clearance control system for adjusting a running clearance (L) between a rotor (12) having rotor blades (10) of a turbomachine (14) and a casing (18) that surrounds at least sections thereof and comprises at least two segments (16a-d), with at least one adjusting device (20), which is coupled t
1. A clearance control system for adjusting a running clearance (L) between a rotor (12) having rotor blades (10) of a turbomachine (14) and a casing (18) that surrounds at least sections thereof and comprises at least two segments (16a-d), with at least one adjusting device (20), which is coupled to at least one segment (16a-d) of the casing (18), and by means of which the at least one segment (16a-d) for adjusting the running clearance (L) can be moved radially in relation to a rotational axis (D) of the rotor (12), characterized in that each segment (16a-d) of the casing (18) is coupled to at least three adjusting devices (20) of the clearance control system, wherein the at least one segment (16a-d) is movable independently of one another. 2. The clearance control system according to claim 1, wherein two adjusting devices (20) are arranged at oppositely placed edge regions of their associated segment (16a-d) and an adjusting device (20) is arranged in the middle of its associated segment (16a-d). 3. The clearance control system according to claim 1, wherein at least two adjacent segments (16a-d) are coupled to a common adjusting device (20). 4. The clearance control system according to claim 1, further comprising: an adjusting element (22) that is arranged around the rotor (12) is provided, which element is coupled to at least one adjusting device (20) and can be moved with respect to it for actuating the adjusting device (20). 5. The clearance control system according to claim 4, wherein the adjusting element (22) comprises several subsections (22a, 22b), which are joined with one another in an articulated manner. 6. The clearance control system according to claim 4, wherein the adjusting element (22) can be at least one of shifted axially in relation to the rotational axis (D) of the rotor (12) and pivoted with respect to the rotor (12) in order to adjust the running clearance (L). 7. The clearance control system according to claim 4, wherein at least one of the adjusting devices (20) is designed to transform an at least predominantly axial movement of the adjusting element (22) into an at least predominantly radial movement of the associated segment (16a-d) of the casing (18). 8. The clearance control system according to claim 1, wherein at least one adjusting device (20) is fixed in place on a support housing (24). 9. The clearance control system according claim 8, wherein the support housing (24) is arranged on the outer circumference of the casing (18). 10. The clearance control system according to claim 8, wherein at least one sealing element (40) is provided, by means of which the support housing (24) is sealed with respect to the casing (18). 11. The clearance control system according to claim 8, wherein the casing (18) comprises at least one guide vane (34) and rests against the support housing (24), by means of a thrust rod (36). 12. The clearance control system according to claim 1, wherein at least one sensor device (26) is provided, for determining a magnitude (Δr) of the running clearance (L). 13. The clearance control system according to claim 12, wherein the sensor device (26) is arranged in the region of at least one adjusting device (20). 14. The clearance control system according to claim 12, wherein several sensor devices (26a-d) are provided, which are arranged at a spacing from one another, uniformly, or can be arranged on the outer circumference of the casing (18). 15. The clearance control system according to claim 4, wherein at least one actuator (28) coupled to the adjusting element (22) is provided, by means of which the adjusting element (22) can be shifted axially in relation to the rotational axis (D) of the rotor (12) or can be pivoted with respect to the rotor (12). 16. The clearance control system according to claim 15, wherein the actuator (28) is arranged in the region of at least one adjusting device (20). 17. The clearance control system according to claim 15, wherein several actuators (28a-d) are provided, which are arranged at a distance from one another, uniformly, and/or is arranged on the outer circumference of the casing (18). 18. The clearance control system according to claim 12, wherein at least one regulating unit (30) is provided, which is coupled to at least one sensor device (26a-d) and at least one actuator (28a-d) and is designed to control or regulate the at least one actuator (28a-d) depending on the magnitude (Δr) of the running clearance (L) determined by means of the at least one sensor device (26a-d). 19. The clearance control system according to claim 4, wherein at least two adjusting devices (20) are arranged axially in relation to the rotational axis (D) of the rotor (12) and can be actuated jointly by means of the adjusting element (22). 20. The clearance control system according to claim 1, wherein at least one adjusting device (20) comprises at least one of: an actuating lever (66), a thrust bearing (60), a recirculating ball thread (58), a spindle drive, a camshaft (46), a flexing spring (38), a spring element (54), a toggle lever (42), and a catch mechanism. 21. The clearance control system according to claim 1, wherein at least one adjusting device (20) comprises a sealing element (52), which is designed as one of a V-band clamp, a bellows seal, a piston ring, a C seal. 22. The clearance control system according to claim 1, wherein at least one adjusting device (20) comprises a tension bolt (31) coupled to at least one segment (16a, 16b) and a pressure bolt (80) coupled to at least one segment (16a, 16b), with the tension bolt (31) and the pressure bolt (80) being movable relative to one another and being force-loaded against one another. 23. The clearance control system according to claim 1, comprising: a rotor (12) having rotor blades (10), the casing (18) that surrounds at least sections thereof and comprises at least two segments (16a-d), and a clearance control system by means of which a running clearance (L) between the rotor (12) and the casing (18) can be adjusted, wherein the rotor blades, casing and clearance control system are configured for use in a turbomachine. 24. The clearance control system according to claim 23, wherein the clearance control system is accommodated in a housing (50) forms at least a part (24) of the housing. 25. The clearance control system according to claim 23, wherein the casing (18) comprises at least one guide vane (34). 26. The clearance control system according to claim 23, wherein at least one segment (16a-d) of the casing (18) comprises a stiffening element (32), by means of which a curvature of the segment (16a-d) can be adjusted depending on the magnitude (Δr) of the running clearance (L). 27. The clearance control system according to claim 23, wherein the clearance control system is arranged in the region of one of: a low-pressure compressor stage, a high-pressure compressor stage, a low-pressure turbine stage, a high-pressure turbine stage of the turbomachine (14). 28. The clearance control system according to claim 23, wherein the casing (18) comprises between two and eight segments (16), these segments being constructed as ring segments of equal arc length. 29. The clearance control system according to claim 23, wherein each segment (16a-d) of the casing (18) is coupled to at least three mutually spaced adjusting devices (20) of the clearance control system. 30. The clearance control system according to claim 23, wherein several casings (18) are arranged along the rotational axis (D) of the rotor (12) with the formation of several running clearances (L) and the running clearances (L) can be adjusted jointly between the rotor (12) and the casings (18) by means of the clearance control system. 31. A method for adjusting a running clearance (L) between a rotor (12) having rotor blades (10) of a turbomachine (14) and a casing (18) that surrounds at least sections thereof and comprises at least two segments (16a-d), comprising the steps of: determining the magnitude (Δr) of the running clearance (L) by means of at least one sensor device (26a-d) and transmission of the magnitude (Δr) to a regulating unit (30);controlling or regulating at least one actuator (28a-d) by means of the regulating unit (30) depending on the determined magnitude (Δr) of the running clearance (L);carrying out at least one of the following: axial shifting pivoting, in relation to a rotational axis (D) of the rotor (12), of an adjusting element (22) arranged around the rotor (12) by means of at least one actuator (28a-d); the at least one actuator (28a-d) being capable of causing at least two points on the adjusting element to move differently far along the rotational axis (D);actuating at least one adjusting device (20) by means of the adjusting element (22), wherein each segment of the casing is coupled to at least three adjusting devices (20); andradially moving, in relation to the rotational axis (D) of the rotor (12), at least one segment (16a-d) of the casing (18) by means of the at least one adjusting device (20) and the magnitude (Δr) of the running clearance (L) is determined in the case of a defective sensor device (26a-d) by means of the regulating unit (30) on the basis of the magnitude (Δr) determined by another sensor device (26a-d) and the at least one actuator (28a-d) is controlled or regulated depending on the magnitude (Δr) hereby determined.
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