Question

Identify appropriate bearings for the following applications: (a) A single spool (shaft) gas turbine operating at 12000 rpm with a shaft diameter of 40 mm. (b) A turbocharger spinning at up to 150 000 rpm with a shaft diameter of 10 mm. (c) A photocopier roller operating at 150 rpm with a spindle diameter of 10 mm. (d) A ship's propeller shaft operating at ! 1500 rpm WY: 1 h him in Figure 4 31 -

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Answer 1

(a) A single spool (shaft) of gas turbine of 40mm shaft diameter operating at 12000 rpm will require one deep groove ball bearing to handle thrust & radial load and one straight roller bearing to handle only radial load.

(b) Due to high heat generation in turbocharger a turbocharger of 10 mm shaft diameter operating at 150000 rpm will require high heat resistant ceramic ball bearing.

(c) A photocopier roller with spindle diameter 10 mm operating at 150 rpm will require Deep Groove Ball Bearing.

(d) A ship's propeller shaft operating at 1500 rpm will require shoe type thrust bearing.