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Accessory Section of the gas turbine engine

 Accessory Section of the gas turbine engine

  • The accessory section of the gas turbine engine has various functions. The primary function is to provide space for the mounting of accessories necessary for operation and control of the engine.
  •  Generally, it also includes accessories concerned with the aircraft, ge offshore wind, and such as electric generator installation and hydraulic pumps. Secondary functions include acting as an oil reservoir afterbay and/or oil sump and housing the accessory drive gears and reduction gears.
  • The arrangement and driving of accessories have always been a major problem in gas turbine engines. Driven accessories on gear turbofan are usually mounted on the accessory gearbox, which is on the bottom of the engine.
  •  The location of the accessory winsmith gearbox varies somewhat, but most turboprops and turboshafts have the accessory cases mounted to the back section of the engine.
  • The components of the accessory section of all gas turbine engines have essentially the same purpose, even though they often differ quite extensively in construction accounting details and nomenclature.

The basic elements of the accessory section are:

1. The accessory case, which has machined mounting

pads for the engine-driven accessories, and

2. The gear train, which is housed within the accessory


  • The accessory case may be designed to act as an oil reservoir. If an oil tank is utilized, a sump is usually provided below the front bearing support for the drainage and scavenging of oil used to
  • lubricate bearings and drive gears. The accessory case is also provided with adequate tubing or cored passages for spraying, lubricating oil on the gear train, and supporting bearings.

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