Variable geometry turbocharger
a turbocharger and variable geometry technology, applied in the direction of machines/engines, stators, liquid fuel engines, etc., can solve the problems of degrading turbine efficiency, limited, difficult to achieve enhancing turbine efficiency, etc., and achieve the effect of simple structure and guaranteed stable movement of nozzle vanes
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[0029]Embodiments of the invention will be described below with reference to the attached drawings.
[0030]FIG. 2 shows an embodiment of the invention in which a disk-shaped rear exhaust introduction wall 51 is substituted for the rear exhaust introduction wall 11 with the extension 11′ in the variable geometry turbocharger of FIG. 1. Thus, each of the front and rear exhaust introduction walls 10 and 51 is disk-shaped. It is preferable that the disk-shaped front and rear exhaust introduction walls 10 and 51 are made of same material or materials equivalent in linear expansion coefficient. With the rear and front exhaust introduction walls 51 and 10 set equivalent in linear expansion coefficient, the vane shafts 16a and 16b fixed to opposite sides of each nozzle vane 15 are consistently coaxially supported by the exhaust introduction walls 51 and 10.
[0031]The turbine housing 1 is formed with an extension 39 extending to a position facing to and spaced apart by a required space from the...
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