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You are here: Home / Powerplant / Lubrication and Cooling Systems / Turbine Lubrication System Components – Oil Jets

Turbine Lubrication System Components – Oil Jets

Filed Under: Lubrication and Cooling Systems

Oil jets (or nozzles) are located in the pressure lines adjacent to, or within, the bearing compartments and rotor shaft couplings. [Figure 6-39] The oil from these nozzles is delivered in the form of an atomized spray. Some engines use an air-oil mist spray that is produced by tapping high-pressure bleed air from the compressor to the oil nozzle outlet. This method is considered adequate for ball and roller bearings; however, the solid oil spray method is considered the better of the two methods.

Figure 6-39. Oil nozzles spray lubricate on bearings.
Figure 6-39. Oil nozzles spray lubricate on bearings.

The oil jets are easily clogged because of the small orifice in their tips; consequently, the oil must be free of any foreign particles. If the last-chance filters in the oil jets should become clogged, bearing failure usually results since nozzles are not accessible for cleaning except during engine maintenance. To prevent damage from clogged oil jets, main oil filters are checked frequently for contamination.

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