Variable cross-section nozzle ring and turbocharger

By setting multiple toothed working surfaces in the variable cross-section nozzle ring and evenly distributing the friction path, the wear problem between the actuating plate and the mounting plate is solved, ensuring that the nozzle ring reaches the design opening throughout its entire life cycle, thereby improving engine performance and service life.

CN122428971APending Publication Date: 2026-07-21PINGXIANG DEBO TECH CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
PINGXIANG DEBO TECH CO LTD
Filing Date
2026-04-14
Publication Date
2026-07-21

AI Technical Summary

Technical Problem

The support structure between the actuation plate and the mounting plate of the existing variable cross section nozzle ring is prone to wear, which leads to limited adjustment stroke and affects engine power output and emission control.

Method used

A variable cross-section nozzle ring is designed. By setting multiple first toothed working surfaces on the shoulder of the mounting plate and multiple second toothed working surfaces on the inner ring of the actuating plate, it is ensured that the entire surfaces of the first and second toothed working surfaces are relatively slid over during the rotation of the actuating plate, so as to evenly distribute the friction path and avoid the formation of local wear pits.

Benefits of technology

Ensure that the nozzle ring can reach the original design maximum or minimum opening throughout its entire life cycle, reduce frictional resistance, extend service life, and improve engine power output and emission control.

✦ Generated by Eureka AI based on patent content.

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    Figure CN122428971A_ABST
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Abstract

The application discloses a variable cross-section nozzle ring. The variable cross-section nozzle ring comprises a mounting disc and a dial disc, the central axis of the mounting disc and the central axis of the dial disc are on the same axis, a plurality of first tooth-shaped working surfaces are arranged on the shaft shoulder of the mounting disc, a plurality of second tooth-shaped working surfaces are arranged on the inner ring of the dial disc, the first tooth-shaped working surfaces and the second tooth-shaped working surfaces are matched to form a pair of kinematic pairs for supporting the rotation of the dial disc, wherein when the dial disc rotates relative to the mounting disc from a first limit position to a second limit position, the whole surface of the first tooth-shaped working surfaces and the second tooth-shaped working surfaces is relatively slid. The whole contact surface of the first tooth-shaped working surfaces and the second tooth-shaped working surfaces is synchronously abraded and uniformly thinned, so that the nozzle ring can reach the maximum opening or the minimum opening of the original design in the whole service life.
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