Turbomachinery incorporating heat transfer reduction features

Details Turbomachinery incorporating heat transfer reduction features Turbomachinery incorporating heat transfer reduction features

1993-07-02

1996-08-27

Look, Edward K.

Rotary kinetic fluid motors or pumps

Including heat insulation or exchange means

415200, 4152141, 417406, 384413, 384473, F04D 2958

Patent

active

055494498

ABSTRACT:
A turbocharger includes a turbine and compressor housing attached by a circumferential clamp with circumferentially staggered contact points between the clamp and the housings to reduce heat transfer from the turbine housing to the compressor housing. The mass of the turbine housing is reduced and the mass of the compressor housing is increased to reduce the transfer of heat from the turbine housing to the compressor housing from the thermal flux of the turbine side heat energy. The compressor housing mass is increased by incorporating a heat-transfer interface between the compressor housing and the oil reservoir cover, which oil reservoir extends circumferentially around the axis of the turbocharger rotor shaft. Concentricity between the components of the turbocharger is achieved by creating the radial junction between the turbine and compressor backwalls on the smallest feasible diameter to minimize the effects of thermally induced distortion on component concentricity. The compressor side backwall is fitted with an insert having a mean coefficient of thermal expansion equal to or greater than the average of the mean coefficient of thermal expansion of the turbine and compressor backwalls to maintain proper concentricity between the turbine housing and the compressor housing even though such housings are formed of different materials having different coefficients of thermal conductivity and thermal expansion.

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