Rotor for a turbomachine

Patent metadata

Field	Value
Publication number	US-2018371916-A1
Application number	US-201615781719-A
Country	US
Kind code	A1
Filing date	Nov 21, 2016
Priority date	Dec 16, 2015
Publication date	Dec 27, 2018
Grant date	—

Abstract

A rotor for a turbomachine, includes a plurality of axially adjacently arranged rotor segments which are each provided with a central opening, an individual tie rod extending through the openings of the rotor segments, and two holding devices which are arranged on axially opposing ends of the tie rod and hold the rotor segments together, the rotor segments forming at least two rotor segment groups between which at least one other holding device is arranged.

First claim

1 .- 9 . (canceled)

10 . A rotor for a turbomachine, comprising:
a plurality of rotor segments which are each provided with a central opening and are arranged axially adjacent to one another, a single tie rod which extends through the openings of the rotor segments, and two braces which are arranged at axially opposite ends of the tie rod and brace the rotor segments against one another, wherein the rotor segments form at least two rotor segment groups, between which at least one further brace is arranged, and wherein the tie rod comprises a plurality of cylindrical tie rod sections which are arranged axially adjacent to one another and are associated with in each case one rotor segment group, wherein, starting from one end of the tie rod, the cylinder diameters of the tie rod sections decrease in a stepwise manner with a stepped outer contour being formed, wherein the braces comprise multiple pressure elements which are axially adjustable for the purpose of bracing and by way of which the rotor segments are acted on by an axial force in the direction of in each case corresponding stop elements, wherein each pressure element is formed by a nut which is screwed onto an outer thread of the tie rod, said nut being arranged in a receiving space, defined by a rotor segment, and pressing against said rotor segment.

11 . The rotor as claimed in claim 10 ,
wherein the braces comprise a stop element and a pressure element which is adjustable for the purpose of bracing and by way of which the rotor segments of a rotor segment group are acted on by an axial force in the direction of the stop element.

12 . The rotor as claimed in claim 11 ,
wherein at least one stop element is formed by a rotor segment.

13 . The rotor as claimed in claim 12 ,
wherein the at least one stop element is formed by a rotor segment which has an axially extending threaded bore into which an outer thread formed at a free end of the tie rod is screwed.

14 . The rotor as claimed claim 12 ,
wherein the at least one stop element is formed by a rotor segment of an adjacent rotor segment group.

15 . The rotor as claimed in claim 11 ,
wherein at least one pressure element is formed by a nut which is screwed onto an outer thread of the tie rod, said nut being arranged in a receiving space, defined by at least one rotor segment, and pressing against an adjacent rotor segment.

16 . The rotor as claimed in claim 10 ,
wherein adjacent tie rod sections are screwed to one another, wherein a tie rod section has an axially extending threaded bore into which an outer thread formed at a free end of the adjacent tie rod section is screwed.

Assignees

• Siemens Ag

Inventors

• Jahrmarcht Steffen
• Miny Kevin

Classifications

• F01D5/066 Primary

  Connecting means for joining rotor-discs or rotor-elements together, e.g. by a central bolt, by clamps · CPC title

• F04D29/054

  Arrangements for joining or assembling shafts · CPC title

• F04D17/122

  the individual rotor discs being, one for each stage, on a common shaft and axially spaced, e.g. conventional centrifugal multi- stage compressors · CPC title

• F05D2240/60

  Shafts · CPC title

• F05D2260/31

  Retaining bolts or nuts · CPC title