Adjustable nozzle mechanism for variable capacity turbine and its production method

摘要

The object of this invention is to propose a variable capacity turbine, in which the adjustment works can be simplified to decrease man-hours, as well as assembly and adjustment costs. The structure can also be simplified to decrease part category numbers and the number of the parts itself, thus decreasing part costs and furthermore enabling the nozzle vane setup of the adjustable nozzle mechanism to a high degree of accuracy without being influenced by the degree of dimensional accuracy of the component parts, such as the nozzle vane and the link assembly. To assemble the adjustable nozzle mechanism used in such variable capacity turbine, it needs the steps of providing a plurality of joint members (lever plates) which are the same in number as the nozzle shafts, and connect a plurality of nozzle vanes with the nozzle driving member; fitting and fixing each nozzle shaft to one end of each lever plate after setting the predetermined positional relationship between the wing angle of the nozzle vanes and the predetermined fitting direction of the fixed section of the lever plate; and engaging another end of each lever plate with the nozzle driving member.