Method of monitoring rubbing between a rotary party and a stationary part in a rotating turbomachine, monitoring arrangement and turbomachine

Patent metadata

Field	Value
Publication number	US-10161785-B2
Application number	US-201515305665-A
Country	US
Kind code	B2
Filing date	Apr 22, 2015
Priority date	Apr 24, 2014
Publication date	Dec 25, 2018
Grant date	Dec 25, 2018

Abstract

The arrangement for monitoring rubbing between a rotary part and a stationary part in a rotating turbomachine comprises at least one mechanical oscillations detector for measuring mechanical oscillations at at least one point of the turbomachine, at least one particles detector for measuring debris passing in at least one section of a flow path of the turbomachine, and an electronic monitoring unit electrically or electromagnetically connected to the oscillations detector and the particles detector, and arranged to acquire and process signals generated by the oscillations detector and the particles detector. The electronic monitoring unit uses the oscillations measurement primarily for estimating presence of rubbing and the debris measurement primarily for estimating severity of rubbing.

First claim

What is claimed is:

1. A method of monitoring rubbing between a rotary part and a stationary part in a rotating turbomachine, the method comprising:
measuring mechanical oscillations at at least one point of the turbomachine; and
measuring debris passing in at least one section of a flow path of the turbomachine;
wherein at least one oscillations measurement is used for estimating presence of rubbing; and
wherein at least one debris measurement is used for estimating severity of rubbing.

2. The method of claim 1 , wherein mechanical oscillations are measured at a set of points of the turbomachine, wherein oscillations measurements at the set of points are used for estimating a location of rubbing.

3. The method of claim 1 , wherein debris is measured at an outlet of the turbomachine.

4. The method of claim 1 , wherein rubbing severity estimation is carried out if rubbing presence estimation is positive.

5. The method of claim 1 , further comprising determining an operating mode of the turbomachine, wherein the rubbing presence estimation and/or the rubbing severity estimation are/is based on the determined operating mode.

6. The method of claim 1 , wherein the turbomachine is in an online washing operating mode with high mass flow of detergent substance.

7. The method of claim 1 , wherein the turbomachine is a combustion gas turbine engine.

8. An arrangement for monitoring rubbing between a rotary part and a stationary part in a rotating turbomachine, the arrangement comprising:
at least one mechanical oscillations detector;
at least one particles detector; and
an electronic monitoring unit electrically or electromagnetically connected to the at least one oscillations detector and the at least one particles detector, and arranged to acquire and process signals generated by the at least one oscillations detector and the at least one particles detector.

9. The arrangement of claim 8 , further comprising a set of vibrations detectors electrically or electromagnetically connected to the electronic monitoring unit.

10. A turbomachine comprising:
an arrangement for monitoring rubbing between a rotary part and a stationary part in the turbomachine when rotating the arrangement comprising:
at least one mechanical oscillations detector;
at least one particles detector; and
an electronic monitoring unit electrically or electromagnetically connected to the at least one oscillations detector and the at least one particles detector, and arranged to acquire and process signals generated by the at least one oscillations detector and the at least one particles detector.

11. The turbomachine of claim 10 , further comprising a set of vibrations detectors electrically or electromagnetically connected to the electronic monitoring unit.

Assignees

• Nuovo Pignone Srl

Inventors

• Pepe Antonello
• Sepe Marzia
• Nurzad Dario
• Garbin Riccardo

Classifications

• F05D2220/32

  in gas turbines · CPC title

• F01D21/04

  responsive to undesired position of rotor relative to stator {or to breaking-off of a part of the rotor}, e.g. indicating such position · CPC title

• G01H1/003 Primary

  of rotating machines (G01H1/10 takes precedence) · CPC title

• G01N2291/2693

  Rotor or turbine parts · CPC title

• F05D2270/114

  by limiting mechanical stresses · CPC title