Turbomachinery Package Specification

Titan 250 Generator Set

 

 

4 Reduction-Drive Gearbox

4.1General Description

The reduction-drive gearbox (Figure 5) is an industrial, epicyclic, star-gear design selected specifically for generator set applications. The gearbox uses few moving parts, which provides high reliability and ease of assembly and disassembly. The reduction gearbox is designed for continuous-duty operation and reduces the output speed of the turbine to the required operating speed of the generator. The gearbox is coupled to the gas turbine through a balanced high-speed shaft, splined at both ends. The output shaft is coupled to the generator through a flexible disk-type dry coupling enclosed in a coupling guard. The design of the gearbox facilitates straight-through shafting, avoiding offset problems and permitting engine, gear, and generator alignment from a common base. Gear lubrication is provided by the package lube oil system.

The gearbox is designed to provide 99% reliability between major inspections and overhauls.

Figure 5. Typical Reduction Gearbox for the Titan 250 Generator Set

Table 2. Reduction-Drive Gearbox Specifications

Approximate Weight

Gearbox

 

7300 kg (16,100 lb)

Output Speed

 

50 Hz Service

 

1500 rpm

60 Hz Service

 

1800 rpm

Inspection and Overhaul Intervals

 

Major Inspection Interval

 

30,000 hours

Overhaul Interval

 

100,000 hours

Compliance

 

American Petroleum Institute (API)

 

613 Compliant With Exceptions, Refer to Solar’s

 

 

Standard List of Exceptions

Ratings

 

American Gear Manufacturers Association

 

In Excess of 1.10 for Generator Applications

(AGMA)

 

 

Vibration Monitoring

 

Gearbox

 

Acceleration Probe

© 2008 Solar Turbines Incorporated. All rights reserved.

TPS250GS/908 - Preliminary

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