초록 ▼

A turbine rotor unit and a method of producing the same are disclosed. This turbine rotor unit comprises a ceramic rotor, a ceramic shaft integrally united with the ceramic rotor and a metal shaft provided with a cylindrical portion fixing the ceramic shaft therein and is characterized by having a g

A turbine rotor unit and a method of producing the same are disclosed. This turbine rotor unit comprises a ceramic rotor, a ceramic shaft integrally united with the ceramic rotor and a metal shaft provided with a cylindrical portion fixing the ceramic shaft therein and is characterized by having a gap between a substantial portion of the inner peripheral surface of the cylinder portion located near the side of the ceramic rotor and the outer surface of the ceramic shaft. Further, the turbine rotor unit is produced by arranging on one end of the metal shaft a cylindrical portion wherein an inner diameter at its opening side is larger than that at the bottom side, inserting the ceramic shaft into the cylindrical portion, and fixing the ceramic shaft to the cylindrical portion at its small diameter side.

대표청구항 ▼

A turbine rotor unit comprising: a bearing housing; a ceramic rotor comprising a front surface and back surface; a ceramic shaft integral with said back surface of said ceramic rotor, said ceramic shaft having an outer peripheral surface; a metal shaft having a first longitudinal end, a hollow cylin

A turbine rotor unit comprising: a bearing housing; a ceramic rotor comprising a front surface and back surface; a ceramic shaft integral with said back surface of said ceramic rotor, said ceramic shaft having an outer peripheral surface; a metal shaft having a first longitudinal end, a hollow cylindrical portion with a first inside peripheral surface and second inside peripheral surface, said first inside peripheral surface having a diameter which is larger than an inside diameter of said second inside peripheral surface, said first inside peripheral surface being located closer to said back surface of said ceramic rotor than said second inside peripheral surface, a second portion of said outer peripheral surface of said ceramic shaft being fixed to said metal shaft at said second inner peripheral surface, thereby forming a contact surface area between said metal shaft and said ceramic shaft, such that a longitudinally extending radial gap exists between a first portion of said outer peripheral surface of said ceramic shaft and said first inside peripheral surface, wherein a portion of said longitudinal extending radial gap is located between two bearing members within said bearing housing, and said contact surface area is located completely within said bearing housing.