SEGMENTED PISTON SEAL SYSTEM

• US 20190323370A1
• Filed: 04/19/2018
• Published: 10/24/2019
• Est. Priority Date: 04/19/2018
• Status: Active Grant

• Current Assignee: GE Infrastructure Technology, LLC (General Electric Company)
• Original Assignee: General Electric Company
• Inventors: Trivedi, Deepak, Bidkar, Rahul Anil, Zheng, Xiaoqing, Wolfe, Christopher Edward
• Granted Patent: US 10,989,058 B2
• Time in Patent Office: Days
• CPC Class Codes: F01D 11/003 by packing rings; Mechanical seals
• CPC Class Codes: F01D 25/183 Sealing means
• CPC Class Codes: F01D 25/265 Vertically split casings; Clamping arrangements therefor
• CPC Class Codes: F01D 5/02 Blade-carrying members, e.g. rotors rotors of non-bladed type F01D1/34; stators F01D9/00 ; selecting particular materials F01D5/28
• CPC Class Codes: F05D 2220/32 in gas turbines
• CPC Class Codes: F05D 2230/60 Assembly methods
• CPC Class Codes: F05D 2240/55 Seals
• CPC Class Codes: F16J 15/3272 the rings having a break or opening, e.g. to enable mounting on a shaft otherwise than from a shaft end
• CPC Class Codes: F16J 15/3488 Split-rings

Abstract

The subject matter described herein relate to a segmented piston seal system. The segmented piston seal includes a first semi-circular section (FSCS) that includes a first locking structure at opposite ends of the FSCS. The segmented piston seal includes a second semi-circular section (SSCS) that includes a second locking structure at opposite ends of the SSCS. The first and second locking structures are configured to lock the FSCS and the SSCS together to form a piston seal.

Claims

1. A segmented piston seal comprising:

a first semi-circular section (FSCS) that includes first locking structures at opposite ends of the FSCS;

a second semi-circular section (SSCS) that includes second locking structures at opposite ends of the SSCS, wherein the first and second locking structures are configured to lock the FSCS and the SSCS together to form a piston seal; and

the FSCS and the SSCS are configured to reduce the pre-load of the piston seal on a rotor, wherein the first and second locking structures preserve an internal moment continuity across a circumference of the piston seal.

2. The segmented piston seal of claim 1, wherein the FSCS and the SSCS are configured to be installed on the rotor of a combined cycle system.

3. The segmented piston seal of claim 1, wherein the first and second locking structures include orthogonal arms configured to be positioned within orthogonal receptacles of opposing first and second locking structures.

4. The segmented piston seal of claim 1, wherein the first and second locking structures include a plurality of rods configured to be positioned within a series of receptacle holes that are configured to receive the plurality of rods.

5. The segmented piston seal of claim 1, wherein the first and second locking structures include a plurality of rods having spheres with expanded diameters, the plurality of rods are configured to be received by corresponding holes, the corresponding holes having an expanded diameter to receive the plurality of rods.

6. The segmented piston seal of claim 1, wherein the first and second locking structures each include a rod having a sphere with an expanded diameter, the rods configured to be received by corresponding holes, the holes having an expanded diameters to receive the rods.

7. The segmented piston seal of claim 1, wherein the first and second locking structures include a plurality of rods having expanded diameters, the plurality of rods are configured to be received by corresponding holes, the holes having expanded diameters to receive the plurality of rods.

8. The segmented piston seal of claim 1, wherein the first and second locking structures each include a rod having an expanded diameter, the rods configured to be received by corresponding holes, the holes having expanded diameters to receive the rods.

9. The segmented piston seal of claim 1, wherein the first and second locking structures include first and second orthogonal cut-outs, the first and second orthogonal cut-outs are configured to be received by each other.

10. The segmented piston seal of claim 1, wherein an outer circumference of the FSCS and the SSCS include a groove, the groove includes an orthogonal cut-out.

11. A method of forming a segmented piston seal, the method comprising:

forming a first semi-circular section (FSCS);

constructing a first locking structure at opposite ends of the FSCS;

forming a second semi-circular section (SSCS); and

constructing a second locking structure at opposite ends of the SSCS, wherein the first and second locking structures are configured to lock the FSCS and the SSCS together to form a piston seal, wherein the FSCS and the SSCS reduces the pre-load of the piston seal on a rotor.

12. The method of claim 11, further comprising installing the FSCS and the SSCS to install on a rotor of a combined cycle system.

13. The method of claim 11, further comprising constructing the first and second locking structures orthogonal arms;

and

forming orthogonal receptacles of opposing first and second locking structures.

14. The method of claim 11, further comprising constructing the first and second locking structures to include a plurality of rods;

and

forming receptacle holes that are configured to receive the plurality of rods.

15. The method of claim 11, further comprising constructing the first and second locking structures to include a plurality of rods having spheres with expanded diameters;

and

forming the corresponding holes having an expanded diameter to receive the plurality of rods.

16. The method of claim 11, further comprising constructing the first and second locking structures each include a rod having a sphere with an expanded diameter;

and

forming the corresponding holes having expanded diameters to receive the rods.

17. The method of claim 11, further comprising constructing the first and second locking structures each include a plurality of rods having an expanded diameter;

and

forming the corresponding holes having expanded diameters to receive the plurality of rods.

18. The method of claim 11, further comprising constructing the first and second locking structures include a rod having expanded diameters;

and

forming the corresponding holes having an expanded diameter to receive the rod.

19. The method of claim 11, further comprising constructing the first and second locking structures include first and second orthogonal cut-outs;

and

forming the first and second orthogonal cut-outs are configured to be receive the first and second orthogonal cut-outs.

20. The segmented piston seal of, comprising:

a first semi-circular section (FSCS) that includes a first locking structure at opposite ends of the FSCS;

a second semi-circular section (SSCS) that includes a second locking structure at opposite ends of the SSCS, wherein the first and second locking structures are configured to lock the FSCS and the SSCS together to form a piston seal, wherein the FSCS and the SSCS are configured to be installed horizontally on a rotor of a combined cycle system;

the FSCS and the SSCS are configured to reduce the pre-load of the piston seal on a rotor, wherein the first and second locking structures preserve an internal moment continuity across a circumference of the piston seal; and

wherein the first and second locking structures comprises at least one of;

orthogonal arms, the orthogonal arms are configured to be positioned within orthogonal receptacles, a plurality of rods, the plurality of rods are configured to be positioned within a series of receptacle holes that are configured to receive the plurality of rods;

a plurality of rods having spheres with expanded diameters, the plurality of rods are configured to be received by corresponding holes, the holes having an expanded diameter to receive the plurality of rods;

a rod having a sphere with expanded diameters, the rod is configured to be received by corresponding holes, the holes having an expanded diameter to receive the rod;

a plurality of rods having expanded diameters, the plurality of rods are configured to be received by corresponding holes, the holes having an expanded diameter to receive the plurality of rods, a rod having expanded diameters;

the rod is configured to be received by corresponding holes, the holes having an expanded diameter to receive the rod, first and second orthogonal cut-outs; and

the first and second orthogonal cut-outs are configured to be received by each other.