Axial flow turbine for turbomachinery, related disassembly methods, and use

Abstract

This specification describes an axial flow turbine for turbomachinery, a turbomachinery, and a method for disassembling a nozzle ring. The axial flow turbine for turbomachinery includes a turbine housing, a turbine wheel disposed within the turbine housing and mounted on a shaft, and a nozzle ring (110) at least partially located upstream of the turbine wheel within the turbine housing (160). The nozzle ring has an outer ring (112). Furthermore, the axial flow turbine includes a cover ring (120) located downstream of the nozzle ring (110) within the turbine housing (160), and fastening means (140) that axially removably connects the outer ring (112) to the cover ring (120) on a radially outward side. The downstream end of the outer ring (112) has a nozzle ring cam (115) projecting radially outward, and the upstream end of the cover ring (120) has a cover ring cam retainer (121). The nozzle ring cam (115) engages with the cover ring cam retainer (121).

Claims

1. A turbomachinery, more specifically an axial flow turbine (100) for an exhaust gas turbocharger, Turbine housing (160) and A turbine impeller (180) is located within the turbine housing (160) and attached to the shaft (170), Displaced within the turbine housing (160), at least partially upstream of the turbine impeller (180), a nozzle ring (110) having an outer ring (112), The covering ring (120) is located within the turbine housing (160) and downstream of the nozzle ring (110), A fastening means (140) is provided to detachably connect the outer ring (112) to the covering ring (120) in the axial direction, Equipped with, An axial flow turbine in which the downstream end of the outer ring (112) has a nozzle ring lug (115) that protrudes radially outward, the upstream end of the covering ring (120) has a covering lug receiving portion (121), and the nozzle ring lug (115) engages with the covering lug receiving portion (121).

2. The axial flow turbine according to claim 1, further comprising a dome (111) positioned at the upstream end of the nozzle ring, wherein the dome (111) is fastened only to the inner ring (114) of the nozzle ring (110), or the dome (111) is integrally formed with the nozzle ring (110), and more specifically with the inner ring (114) of the nozzle ring (110).

3. The axial flow turbine (100) according to any one of claims 1 to 2, wherein the outer ring (112) has a clamp segment (116), and the fastening means (140) extends through an insertion opening (117) of the clamp segment (116), and optionally the fastening means (140) engages with the threads of the covering ring (120).

4. The axial flow turbine (100) according to claim 3, wherein the nozzle ring lug (115) protrudes from the clamp segment (116) by at least 0.05 mm, preferably at least 0.1 mm, more preferably at least 0.2 mm, and most preferably at least 0.3 mm.

5. The axial flow turbine (100) according to claim 3 or 4, wherein the clamp segment (116) has two insertion openings (117), and the nozzle ring lug (115) is positioned between the two insertion openings when viewed in the circumferential direction.

6. The axial flow turbine (100) according to any one of claims 3 to 5, wherein the clamp segment (116) is positioned upstream of the nozzle ring lug (115) and spaced apart from the nozzle ring lug (115), and / or the clamp segment (116) at least partially overlaps the nozzle ring lug (115) when viewed in the circumferential direction.

7. The axial flow turbine (100) according to any one of claims 3 to 6, wherein the covering (120) has a clamp projection (122) for receiving the clamp segment (116).

8. The axial flow turbine (100) according to any one of claims 1 to 7, wherein the outer ring (112) is fastened axially to the covering ring (120) by the fastening means (140), so that the nozzle ring lug (115) is pressed into the covering lug receiving portion (121), more specifically, the clamp segment (116) is pressed against the clamp projection (122).

9. The axial flow turbine (100) according to any one of claims 1 to 8, further comprising a turbine diffuser (130) at least partially located downstream of the turbine impeller (180).

10. The axial flow turbine (100) according to claim 9, wherein the turbine diffuser (130) is integrally formed with the covering (120).

11. The downstream end of the covering (120) is fastened to the upstream end of the turbine diffuser (130), more specifically, the turbine diffuser (130) is removably coupled to the covering (120) by fastening elements (150), the fastening elements (150) extending along an insertion opening (125) of the covering (120) and engaging with threads (131) of the turbine diffuser (130), as described in claim 9.

12. The nozzle ring lug (115) and the covering lug receiving portion (121) form a lug-lug receiving portion pair, and the axial flow turbine (100) has at least three lug-lug receiving portion pairs spaced apart from each other in the circumferential direction of the outer ring (112), according to any one of claims 1 to 11.

13. The axial flow turbine (100) according to any one of claims 1 to 12, wherein the nozzle ring (110) and / or the cover ring (120) are designed to be axially removed on the turbine side.

14. A method for disassembling a nozzle ring (110) that is incorporated into an axial flow turbine (100) and located within the turbine housing (160) of the axial flow turbine, The axial flow turbine (100) has a fastening means (140) on the radially outward side that removably axially connects the outer ring (112) of the nozzle ring (110) to the covering ring (120) of the axial flow turbine (100), and optionally the axial flow turbine (100) has a fastening element (150) on the radially outward side that removably axially connects the covering ring (120) to the turbine diffuser (130) of the axial flow turbine (100), The turbine housing (160) and the nozzle ring (110) are shaped such that an intermediate space (163) is provided between the outer ring (112) of the nozzle ring (110) and the turbine housing, and the method is The steps include removing the outer portion of the gas inlet housing (161) of the turbine housing (160) of the axial flow turbine (100), The steps include removing the fastening means (140) by axial access in the intermediate space (163), and removing the nozzle ring (110) axially from the turbine housing (160) on the turbine side, or The steps include removing the fastening element (150) by axial access in the intermediate space (163), and removing the nozzle ring (110) and the cover ring (120) axially from the turbine housing (160) on the turbine side, Methods that include...

15. The use of an assembly comprising a nozzle ring (110) and a covering ring (120) for the turbine-side installation and / or removal of an axial flow turbine (100) for turbomachinery, wherein the assembly is A nozzle ring (110) having an outer ring (112), incorporated into the turbine housing (160) of the axial flow turbine (100), and designed to be at least partially positioned upstream of the turbine impeller (180) of the axial flow turbine (100), A covering ring (120) is incorporated into the turbine housing (160) and is designed to be positioned downstream of the nozzle ring (110), A fastening means (140) is provided to detachably connect the outer ring (112) to the covering ring (120) in the axial direction, Equipped with, The assembly is used in which the downstream end of the outer ring (112) has a nozzle ring lug (115) that protrudes radially outward, the upstream end of the covering ring (120) has a covering lug receiving portion (121), and the nozzle ring lug (115) engages with the covering lug receiving portion (121).

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