You need JavaScript to view this

Ultrasonic test of highly stressed gear shafts

Abstract

In the power plant industry, gears are used for increasingly higher turbine capacities. Efficiency enhancements, particularly for the combined gas and steam turbine process, lead to an increase in stresses, even for high-performance gears. Consequently, the requirements for non-destructive material testing are on the increase as well. At Siemens KWU, high-performance gears are used so far only for gas turbines with lower rating (65 MW) to adapt the gas turbine speed (5413 rpm) to the generator speed (3000 rpm/ 50 Hz or 3600 rpm/60 Hz). The gear train consists of a forged and case-hardened wheel shaft and pinion shaft made of material 17 CrNiMo 6, where the wheel shaft can be either a solid or a hollow shaft. Dimensions are typically 2.3 m length and 1 m diameter. As a rule, pinion shafts are solid. The gear design, calling for an additional torsion shaft turning inside the hollow wheel shaft, can absorb more torsional load surges and is more tolerant of deviations during gear train alignment. This design requires two additional forgings (torsion shaft and hub) and an additional bearing 2 refs.
Authors:
Schreiner, T; [1]  Heinrich, W; [2]  Achtzehn, J; [3]  Hensley, H [4] 
  1. Siemens AG, Power Generation, KWU, Muelheim (Germany)
  2. Siemens AG, Power Generation, KWU, Berlin (Germany)
  3. Siemens AG, Power Generation, ICVW, Erlangen (Germany)
  4. Siemens Power Generation (Germany)
Publication Date:
Dec 31, 1998
Product Type:
Conference
Report Number:
VTT-SYMP-185(v.2); CONF-980999-
Reference Number:
SCA: 200105; 200104; 360103; PA: FI-99:003079; EDB-99:034983; SN: 99002064693
Resource Relation:
Conference: 4. Baltica seminar on plant maintenance for managing life and performance, Helsinki (Finland), 7-9 Sep 1998; Other Information: PBD: 1998; Related Information: Is Part Of BALTICA IV. Plant maintenance for managing life and performance; Hietanen, S.; Auerkari, P. [eds.] [VTT Manufacturing Technology, Espoo (Finland). Operational Reliability]; PB: 398 p.
Subject:
20 FOSSIL-FUELED POWER PLANTS; 36 MATERIALS SCIENCE; COMBINED-CYCLE POWER PLANTS; GEARS; MECHANICAL SHAFTS; ULTRASONIC TESTING; CHROMIUM-NICKEL-MOLYBDENUM STEELS; STRESSES; QUALITY ASSURANCE; DAMAGE; HEAT TREATMENTS; STEAM TURBINES
OSTI ID:
324995
Research Organizations:
Technical Research Centre of Finland, Espoo (Finland)
Country of Origin:
Finland
Language:
English
Other Identifying Numbers:
Other: ON: DE99730863; ISBN 951-38-4577-X; TRN: FI9903079
Availability:
OSTI as DE99730863
Submitting Site:
FI
Size:
pp. 523-534
Announcement Date:

Citation Formats

Schreiner, T, Heinrich, W, Achtzehn, J, and Hensley, H. Ultrasonic test of highly stressed gear shafts. Finland: N. p., 1998. Web.
Schreiner, T, Heinrich, W, Achtzehn, J, & Hensley, H. Ultrasonic test of highly stressed gear shafts. Finland.
Schreiner, T, Heinrich, W, Achtzehn, J, and Hensley, H. 1998. "Ultrasonic test of highly stressed gear shafts." Finland.
@misc{etde_324995,
title = {Ultrasonic test of highly stressed gear shafts}
author = {Schreiner, T, Heinrich, W, Achtzehn, J, and Hensley, H}
abstractNote = {In the power plant industry, gears are used for increasingly higher turbine capacities. Efficiency enhancements, particularly for the combined gas and steam turbine process, lead to an increase in stresses, even for high-performance gears. Consequently, the requirements for non-destructive material testing are on the increase as well. At Siemens KWU, high-performance gears are used so far only for gas turbines with lower rating (65 MW) to adapt the gas turbine speed (5413 rpm) to the generator speed (3000 rpm/ 50 Hz or 3600 rpm/60 Hz). The gear train consists of a forged and case-hardened wheel shaft and pinion shaft made of material 17 CrNiMo 6, where the wheel shaft can be either a solid or a hollow shaft. Dimensions are typically 2.3 m length and 1 m diameter. As a rule, pinion shafts are solid. The gear design, calling for an additional torsion shaft turning inside the hollow wheel shaft, can absorb more torsional load surges and is more tolerant of deviations during gear train alignment. This design requires two additional forgings (torsion shaft and hub) and an additional bearing 2 refs.}
place = {Finland}
year = {1998}
month = {Dec}
}