Rotary flow machine and method for disassembling the same

Patent metadata

Field	Value
Publication number	US-9739177-B2
Application number	US-201414191839-A
Country	US
Kind code	B2
Filing date	Feb 27, 2014
Priority date	Feb 27, 2013
Publication date	Aug 22, 2017
Grant date	Aug 22, 2017

Abstract

The invention refers to a rotary flow machine having a rotor unit, rotating about a rotational axis, around which in at least one partial axial area a stationary inner housing (IH) is provided at a radial distance. The stationary inner housing (IH) can be divided up along the rotational axis in an upper and a lower inner housing half which adjoin each other along a horizontal split plane. The inner housing (IH) is surrounded in at least one axial section by an outer housing (OH) which can be divided up along the rotational axis in one upper and one lower outer housing half. Further a method for disassembling of a rotary flow machine is disclosed. The lower inner housing half provides support means which support the inner lower housing half on the lower outer housing half. The support means are detachably mounted at the lower inner housing half at least at two opposite support positions (P 1 , P 2 ) relative to the rotational axis along the split plane.

First claim

The invention claimed is:

1. A rotary flow machine comprising:
a rotor unit, rotating around a rotational axis, around which in at least one partial axial area a stationary inner housing is provided at a radial distance which can be divided up along the rotational axis in an upper and a lower inner housing half which adjoin each other along a horizontal split plane, said inner housing is surrounded in at least one axial section by an outer housing which can be divided along the rotational axis in one upper and one lower outer housing half, and the lower inner housing half having a support, which supports the inner lower housing half on the lower outer housing half, and said support is detachably mounted at the lower inner housing half at least at two opposite support positions relative to the rotational axis along the split plane, wherein the lower and upper inner housing half each provides a recess at the support positions which complement to form a single recess in a closed state of the inner housing and said single recess is in a shape of a blind hole being open in a radially outward direction and formed closed against the rotor unit, and said single recess in the inner housing at each support position surrounds a mounting section of the support,
wherein the support includes the mounting section and a carrier section, said mounting section is in contact with the lower inner housing half and detachably mounted to said lower inner housing, and said carrier section protrudes from the lower inner housing half radially outward and ends in a recess of the outer housing half, in which the carrier section rests slidably in a radial direction, and
wherein said recess is formed as an access hole to enable access from radially outside of the outer housing, is bordered by an upper periphery of the upper outer housing half and by a lower periphery of the lower outer housing half, and said carrier section of the support extends radially outward into the recess of the outer housing at each support position such that the carrier section of the support encloses an upper gap with the upper periphery and a lower gap with the lower periphery, and wherein adjustment devices are placed into the lower and upper gap for the purposes of centering the carrier section of the support in a circumferential direction of the outer housing.

2. The rotary flow machine according to claim 1 , wherein the support is a bar-shaped element.

3. The rotary flow machine according to claim 1 , further comprising:
at least one shim, the at least one shim configured to be insertable and removable in radial direction in or out of the lower gap and the upper gap, and wherein the at least one shim is located between the adjustment devices and the support.

4. The rotary flow machine according to claim 1 , wherein the lower periphery of the lower outer housing half, which corresponds to the support surface of the lower outer housing half, is in the circumferential direction below the split plane.

5. The rotary flow machine according to claim 3 , wherein a number and/or a thickness of the at least one shim are chosen such that said carrier section of the support is centered along the split plane.

6. The rotary flow machine according to claim 1 , wherein the rotary flow machine is a gas turbine or a steam-turbine or a compressor unit.

7. A method for disassembling a rotary flow machine, the rotary flow machine includes a rotor unit, rotating around a rotational axis, around which in at least one partial axial area a stationary inner housing is provided at a radial distance which can be divided up along the rotational axis in an upper and a lower inner housing half which adjoin each other along a horizontal split plane, said inner housing is surrounded in at least one axial section by an outer housing which can be divided along the rotational axis in one upper and one lower outer housing half, and the lower inner housing half having a support, which supports the inner lower housing half on the lower outer housing half, and said support is detachably mounted at the lower inner housing half at least at two opposite support positions relative to the rotational axis along the split plane, wherein the lower and upper inner housing half each provides a recess at the support positions which complement to form a single recess in a closed state of the inner housing and said single recess is in a shape of a blind hole being open in a radially outward direction and formed closed against the rotor unit, and said single recess in the inner housing at each support position surrounds a mounting section of the support, wherein the support includes the mounting section and a carrier section, said mounting section is in contact with the lower inner housing half and detachably mounted to said lower inner housing, and said carrier section protrudes from the lower inner housing half radially outward and ends in a recess of the outer housing half, in which the carrier section rests slidably in a radial direction, and wherein said recess is formed as an access hole to enable access from radially outside of the outer housing, is bordered by an upper periphery of the upper outer housing half and by a lower periphery of the lower outer housing half, and said carrier section of the support extends radially outward into the recess of the outer housing at each support position such that the carrier section of the support encloses an upper gap with the upper periphery and a lower gap with the lower periphery, and wherein adjustment devices are placed into the lower and upper gap for the purposes of centering the carrier section of the support in a circumferential direction of the outer housing, the method comprising:
removing the upper outer housing half by lifting off in a vertical direction the upper outer housing half from the lower outer housing half, and
removing the upper inner housing half by lifting off in a vertical direction the upper inner housing half from the lower inner housing half while the lower inner housing half being supported by the lower outer housing half exclusively.

8. The method according to claim 7 , comprising:
releasing the support at the support positions between the lower inner housing half and the lower outer housing half, and
rotating the lower inner housing half around the rotational axis until the lower inner housing half is able to be lifted vertically.

9. The rotary flow machine according to claim 5 , wherein the split plane passes through the carrier section of the support.

10. The method according to claim 7 , wherein the support is a bar-shaped element.

11. The method according to claim 7 , comprising:
inserting at least one shim in radial direction in or out of the lower gap and the upper gap, and
detachably fixing the adjustment devices at the lower outer housing half and at the upper outer housing half.

12. The method according to claim 7 , wherein the lower periphery of the lower outer housing half, which corresponds to the support surface of the lower outer housing half, is in the circumferential direction below the split plane.

13. The method according to claim 11 , comprising:
choosing a number and/or a thickness of the at least one such that said carrier section of the support is centered along the split plane.

14. The method according to claim 7 , wherein the rotary flow machine is a gas turbine or a steam-turbine or a compressor unit.

Assignees

• Alstom Technology Ltd
• Ansaldo Energia Switzerland AG

Inventors

• Schaefer Martin
• Rauch Marc
• Steffen Tobias
• Seng Daniel

Classifications

• F01D25/246

  Fastening of diaphragms or stator-rings · CPC title

• F01D25/28 Primary

  Supporting or mounting arrangements, e.g. for turbine casing · CPC title

• Y10T29/49318

  Repairing or disassembling · CPC title