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why A thrust bearing is used in diesel propulsion engine ?

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  • why A thrust bearing is used in diesel propulsion engine ?



    why A thrust bearing is used in diesel propulsion engine ?

  • #2


    control axial movement of the crankshaft.

    When the ship moves forward or aft, the propeller produces a thrust which is applied to ship’s hull. At the same time this thrust is exerted on the propeller blades. As the propeller is connected to the propeller shaft which is connected to the engine shaft, due to the axial thrust created, there is a tendency for the crankshaft to move inside the engine i.e. the crankshaft will have axial movement. If this axial movement is not prevented or taken care off, there will be misalignment between the piston connecting rod and bottom end bearing. Also the crankshaft webs may touch the A-frame and the main bearings which may damage to the engine structure. Also the rest of the crankshaft will be subjected to axial thrust and hence it may bend or break. Hence it is necessary to take care of this axial thrust before it enters the engine and affects the moving parts of the engine. For this purpose, thrust block is provided at the end of the last unit so that all other units and crankshaft is protected from the axial thrust and the crankshaft alignment will not be affected.

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    • #3
      The thrust bearing bears the axial thrust of the rotor in operation and determines and maintains the axial position between the turbine rotor and the cylinder.

      Thrust ball bearing is a separate bearing, shaft ring, seat ring can be separated from the cage, steel ball components. The shaft ring is a ring matched with the shaft, the seat ring is a ring matched with the bearing hole, and there is a gap between the shaft and the shaft. Thrust ball bearings can only withstand axial load, one-way thrust ball bearings can only withstand one direction of axial load, two-way thrust ball bearings can withstand two directions of axial load. The radial displacement of the shaft can not be limited by the thrust ball bearing, the limit speed is very low, the axial displacement in one direction of the shaft and the shell can be limited by the unidirectional thrust ball bearing, and the axial displacement in both directions can be limited by the two-way bearing.
      Causes of cracks in cylinder Block and cylinder head of Diesel Generator set The cracks in the cylinder block and the cylinder head of diesel generator set are often related to their structures and have certain regularity. Generally speaking, there are three main aspects.

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