Ceramic Turbocharger Rotor

A nickel plate 5 is brazed to a shaft of a ceramic turbine wheel 3 by way of a brazed joint layer 13 of the composition consisting of 20 to 70 wt of silver 1 to 20 wt of palladium 10 to 60 wt of nickel and 1 to 10 wt of titanium.

Ceramic turbocharger rotor.

Development of ceramic turbocharger rotors for high temperature use full record. Performance of a ceramic rotor in a cummins t46 turbocharger 840014 this paper documents the successful operation of a modified cummins t46 turbocharger with a ceramic rotor. Turbochargers adopting ceramic turbine rotor s ctr have been successfully introduced for the purpose of improving vehicle acceleration response the first ceramic turbocharger rotor made up o f. This turbocharger is modified to incorporate a 4 6 inch diameter ceramic turbine rotor pressureless sintered silicon nitride on the hot end.

The features of this rotor are the use of silicon nitride which maintains high mechanical strength up to 1200 c and a new joining technique between the ceramic rotor and its metal shaft. The turbocharger with ceramic rotor reduced response time in boost pressure by 30 resulting in an improvement of engine performances on acceleration response and maximum power out put 165kw. The ceramic turbocharger rotor 1 produced under the same condition as the examples nos. A nickel plate 5 is brazed to a shaf.

In a method of manufacturing a ceramic turbo charger rotor wherein an inner race of an angular ball bearing and a spacer are integrally secured to a journal portion of a metal shaft for connecting a ceramic turbine rotor and a metal compressor rotor the inner race and the spacer are inserted to the journal portion of the metal shaft under a condition such that a tensile load is applied to. Ep0376092b1 ep19890123232 ep89123232a ep0376092b1 ep 0376092 b1 ep0376092 b1 ep 0376092b1 ep 19890123232 ep19890123232 ep 19890123232 ep 89123232 a ep89123232 a ep 89123232a ep 0376092 b1 ep0376092 b1 ep 0376092b1 authority ep european patent office prior art keywords shaft brazed joint metal joint layer brazing prior. Ceramic turbocharger rotor download pdf info publication number ep0376092b1. By this test no defect or damage was found in the brazed joint portion of the turbocharger rotor 1.

A ceramic turbocharger rotor ctr for high temperature use has been developed. 1 7 and actually installed on an engine was tested for the durability under the condition that it was operated at the speed of 120 000 rpm and in the exhaust gases of 950 c.