Turbine and supercharger

By designing the nozzle blade unit and force-applying components, the reliability problem of the turbine variable capacity mechanism under irregular external forces was solved, achieving stable turbine operation and high-efficiency turbocharger performance.

CN116981838BActive Publication Date: 2026-06-26IHI CORP
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Patent Information

Application Number
CN202280020986.1
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Priority Date
2021-06-08
Filing Date
2022-04-27
Publication Date
2026-06-26
Estimated Expiration
2042-04-27

AI Technical Summary

Technical Problem

The reliability of existing turbine variable capacity mechanisms decreases when subjected to irregular external forces, especially due to changes in the exhaust gas state and the effects of vibration and impact, which cause irregular movement of the nozzle blades and affect performance.

Method used

The design employs a nozzle wing unit and force-applying components, using the axial force of the nozzle to make the nozzle blades abut against the facing part, restricting undesirable movements other than rotation. A disc spring or heat shield is used to eliminate gaps, ensuring that the nozzle wing unit rotates only around the nozzle axis.

Benefits of technology

It improves the reliability and performance stability of the turbine, suppresses irregular movement, maintains the normal operation of the variable capacity mechanism, and enhances the efficiency of the turbocharger.

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Abstract

A turbine is provided with: a turbine wheel; a turbine casing including a flow path for a gas flow received from an intake port; a variable capacity mechanism configured inside the turbine casing and receiving the gas to direct the turbine wheel, the variable capacity mechanism having a nozzle ring of a circular plate shape and a nozzle vane unit including: a nozzle vane configured on a main face side of the nozzle ring, a nozzle shaft extending from the nozzle vane and penetrating the nozzle ring, and a nozzle link plate configured on a back face side of the nozzle ring and linked to a front end of the nozzle shaft; and a butterfly spring applying a force in a direction of a nozzle axis line in a state of contacting the nozzle vane unit. The nozzle vane is brought into abutment with a portion facing the nozzle vane by the force.
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