1.2 Layout and function

Layout of ABB TC

Filter silencer
Nozzle ring
Radial plain bearing
Turbine wheel
Thrust bearing
Bearing casing
Bearing bush
Radial plain bearing
Compressor wheel
Gas outlet casing
Air outlet casing
Gas inlet casing

Mode of operation
The turbocharger is a turbo-machine and consists of the following main components:
  1. Turbine
  2. Compressor
These are both mounted on a common shaft. The exhaust gases from the diesel engine flow through the gas inlet casing (7) and nozzle ring (8) to the turbine wheel.

The turbine wheel (9) uses the energy contained in the exhaust gas to drive the compressor wheel (12), whereby the compressor draws in fresh air, and the compressed air is forced into the cylinders.

The exhaust gases escape through the exhaust pipe which is connected to the gas outlet casing (6).

The air which is necessary for the operation of the diesel engine and which is compressed in the turbocharger is drawn through the suction branch or the filter silencer (1) into the compressor wheel (12). It then passes through the diffuser (11) and leaves the turbocharger through the compressor outlet on the air outlet casing (13).

The rotor runs in two radial plain bearings (2/5) which are located in the bearing bush (4) between the compressor and the turbine. The axial thrust bearing (3) is on the compressor side.

The plain bearings are connected to a central lubricating oil feed which is supplied by the oil lubrication circuit of the engine. The oil outlet is always at the lowest point of the bearing casing (10).

These turbocharger types are equipped with adjustable guide vanes instead of a nozzle ring.

          1. Purpose of the manual
          2. Layout and function
          3. Correct use of the turbocharger
          4. Essential information
          5. Abbreviations and symbols
          6. Turbocharger rating plate
          1. Basic safety instructions
          2. General safety instructions
          3. Special safety instructions
          4. Safety instructions and hazard protection
          5. Warnings on the turbocharger
          1. Oil supply
          2. Inspection work
          3. Putting into operation after laying up
          1. Servicing work
          2. Monitoring
          3. Emergency mode TPL..VA
          4. Surging of turbocharger
          5. Contact with rotating parts
          6. Shutting the engine down
          1. Foreword to MaintenanceServicing work
          2. Cleaning the filter silencer
          3. Cleaning the compressor during operation
          4. Cleaning turbines and guide blades in operation
          1. Possible remedies for failures
          1. Turbocharger weights
          2. Remove the turbocharger
          3. Installing the turbocharger
          1. Module weights
          2. Remove filter silencer/air suction branch and compressor casing
          3. Removing cartridge group
          4. Axial clearance
          5. Disassembling and assembling the turbine diffuser
          6. Dismantle the VTG unit together with the gas inlet casing
          7. Installing the VTG unit and gas inlet casing
          8. Installing the cartridge group
          9. Install filter silencer/air suction branch and compressor casing
          10. Table of tightening torques
          1. Possibilities for emergency repair
          2. Fitting the cover plate
          3. Blocking the inlets and outlets
          4. Bypass the turbocharger
          1. Taking out of operation for up to 12 months
          2. Taking out of operation for more than 12 months
          1. Ordering spare parts
          2. Directory of part numbers
          3. General view of turbocharger
          4. General view of cartridge group
          5. General view of VTG unit

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