Segmented ring for installation in a turbomachine

Patent metadata

Field	Value
Publication number	US-11125097-B2
Application number	US-201916453093-A
Country	US
Kind code	B2
Filing date	Jun 26, 2019
Priority date	Jun 28, 2018
Publication date	Sep 21, 2021
Grant date	Sep 21, 2021

Abstract

A segmented ring for installation in a turbomachine, circumferentially divided into segments, considered with respect to a ring axis of the segmented ring, wherein the segmented ring is adapted for installation from radially inside; i.e., the segments can be assembled radially outwardly to form the segmented ring. At least two immediately circumferentially adjacent segments meet in a joint at which a sealing insert is provided. A pocket which is open toward the joint is formed in each of the at least two immediately circumferentially adjacent segments; i.e., two circumferentially mutually facing pockets are provided at the joint. The sealing insert is disposed in the two mutually facing pockets and axially retained therein and extends circumferentially across the joint, and a pocket of the two mutually facing pockets is additionally also open in a radial direction such that this segment can be radially slid onto the sealing insert.

First claim

What is claimed is:

1. A segmented ring for installation in a turbomachine, the segmented ring comprising:
a first ring segments circumferentially dividing a plurality of second ring segments that form a complete ring when assembled with the first ring segment, considered with respect to a ring axis of the first ring segment, the segmented ring being adapted for installation from radially inside the second ring segments, so that the second ring segments are assemblable by moving radially outwardly to form the first ring segment; wherein the first segment and an adjacent second ring segment of the plurality of second ring segments directly adjacent to the first segment meet in a joint;
a sealing insert is provided at the joint, a first pocket being formed in the first segment at the joint and open toward the joint; and a second pocket being formed in the adjacent second ring segment provided at the joint and open toward the joint so that the first pocket faces the second pocket in the circumferential direction to form circumferentially mutually facing first and second pockets,
the sealing insert being disposed in the mutually facing first and second pockets and axially retained in the mutually facing first and second pockets and extending circumferentially across the joint;
the first pocket being additionally also open in a radial direction such that the first ring segment having the first pocket is radially slidable onto the sealing insert.

2. The segmented ring as recited in claim 1 wherein the first pocket is radially inwardly closed and radially outwardly open; and thus the first segment having the first pocket is slidable from radially inside onto the sealing insert.

3. The segmented ring as recited in claim 1 wherein the second pocket is closed both radially inwardly and radially outwardly.

4. The segmented ring as recited in claim 3 second pocket has a depth, taken perpendicular to the joint, at least 0.1 times its height taken parallel to the joint.

5. The segmented ring as recited in claim 1 wherein the sealing insert is a sealing plate or wherein the sealing insert seals the joint in the axial direction.

6. The segmented ring as recited in claim 1 further comprising a retaining ring, the first ring segment and second ring segment being seated on the retaining ring and supported radially inwardly.

7. The segmented ring as recited in claim 1 wherein the first segment has an abutting face at the joint and an another abutting face at the circumferentially opposite end, and the abutting face and the other abutting face are parallel to each other when viewed in the axial direction.

8. The segmented ring as recited in claim 2 wherein the first segment has an abutting face at the joint and an another abutting face at the circumferentially opposite end, and the abutting face and the other abutting face are parallel to each other when viewed in the axial direction; and wherein the radially inwardly closed and radially outwardly open pocket is provided in the segment having the mutually parallel abutting faces, segment having the mutually parallel abutting faces also being provided, at the circumferentially opposite end, with an other radially inwardly closed and radially outwardly open pocket, another sealing insert being disposed in the other radially inwardly closed and radially outwardly open pocket.

9. The segmented ring as recited in claim 1 wherein the first segment has an oblique abutting face at the joint, when viewed in the axial direction, forming an angle α of at least 85° and no more than 110° with a connecting line extending between a point of intersection of the oblique abutting face with an outer periphery of the segmented ring and a point of intersection of an opposite abutting face of the segment with an inner periphery of the segmented ring.

10. The segmented ring as recited in claim 2 wherein the first segment has an oblique abutting face at the joint, when viewed in the axial direction, forming an angle α of at least 85° and no more than 110° with a connecting line extending between a point of intersection of the oblique abutting face with an outer periphery of the segmented ring and a point of intersection of an opposite abutting face of the segment with an inner periphery of the segmented ring; and wherein the pocket radially inwardly closed and radially outwardly open at the joint between the two adjacent segments is disposed at the oblique abutting face.

11. The segmented ring as recited in claim 1 wherein the plurality of the second ring segments are identical in construction.

12. A segmented ring assembly for a turbomachine comprising:
the segmented ring as recited in claim 1 ; and
a mounting part having a form-fitting element having a radially inner projection, the segmented ring being axially form-fittingly disposed on the mounting part to allow the first and second the segments of the segmented ring to be fit to the form-fitting element by moving radially outwardly to be assembled with the radially inner projection of the form-fitting element.

13. The segmented ring assembly as recited in claim 2 further comprising a jacket ring segment adapted to radially outwardly surround a rotor blade ring of the turbomachine, wherein the mounting part on which the segmented ring is axially form-fittingly mounted is a casing part, and wherein the jacket ring segment is mounted radially inwardly of the casing part by the segmented ring forming a supporting seat and the jacket ring segment being seated and supported radially inwardly thereon with an axially forward end.

14. A turbine module comprising the segmented ring assembly as recited in claim 3 and a rotor blade ring, the rotor blade ring radially outwardly surrounded by a jacket ring segment.

15. The turbine module as recited in claim 14 wherein the segmented ring assembly is disposed at an axially forward end of the turbine module.

16. A turbomachine comprising the segmented ring as recited in claim 1 .

17. A jet engine comprising the segmented ring as recited in claim 1 .

Assignees

• MTU Aero Engines AG

Inventors

• Feldmann Manfred

Classifications

• F05D2240/55

  Seals · CPC title

• F05D2240/11

  Shroud seal segments · CPC title

• F01D9/04

  forming ring or sector · CPC title

• F01D11/003

  by packing rings; Mechanical seals · CPC title

• F01D11/08 Primary

  for sealing space between rotor blade tips and stator (specially-shaped blade tips therefor F01D5/20) · CPC title