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Junfeng talk:Bearing housing

Junfeng talk:Bearing housing

1970-01-01
Junfeng talk:Bearing housing   

The greatest temperature gradient in the turbocharger arises between the turbine housing and the bearing housing. That is why an optimum connection of the two housings is so important to the service life of the turbocharger.
The bearing housing was previously connected using clamping segments. This solution allows for a compact and economical design of the turbocharger. The tension strap was selected as a connecting element after taking the aspects of a secure connection for the housing, good thermal decoupling and a simple mounting procedure into account.  

Due to the higher heat flux at 1050°C, the water cooling system of the bearing housing was optimized. The water core in the bearing housing was made larger and moved closer to the piston ring seat. In order to obtain optimal cooling properties, the open flow cross-sectional area was held constant as much as possible along the circumference. The placement of the water connections at the highest point on the bearing housing allow the unimpeded withdrawal of steam bubbles. The number of surfaces to be machined was also reduced through this measure. It is still possible to place the water connections on the side in addition to the water connections on the top of the bearing housing. The supply and return lines can be selected as desired.
 
Picture shows the new generation of turbochargers to be used in the future for all gasoline engines regardless of how high the exhaust gas temperature is. The new series of turbocharger fulfills all requirements placed on a turbo for exhaust temperatures of 1050°C. 

In addition, the existing series of turbines with variable geometry was further refined for use in the new series at an exhaust gas temperature of 1050°C.


                   

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