Blade zero clearance variable area nozzle ring

By disassembling the blades into multiple rows of components and designing an arc-shaped blade profile, the problem of air resistance and exhaust gas loss caused by the large blade size in existing nozzle rings is solved, achieving zero-gap and high-precision airflow control, and reducing the resistance and loss of the nozzle ring.

CN224550189UActive Publication Date: 2026-07-24PINGXIANG DEBO TECH CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
PINGXIANG DEBO TECH CO LTD
Filing Date
2025-07-29
Publication Date
2026-07-24

AI Technical Summary

Technical Problem

The existing variable cross section nozzle ring has a large blade size, resulting in high air resistance and large exhaust power loss. In addition, the gap between multiple blades is not zero at the minimum opening, which cannot meet the application scenarios of zero gap.

Method used

The blades are split into two or more rows of blade assemblies, and multiple rows of blade assemblies are used to control the nozzle ring airflow channel. The blade assemblies are synchronously rotated by the drive plate and the mounting plate through rotational connection, and the driven fork and slot are used to reduce the resistance section per unit length and achieve zero clearance at minimum opening.

Benefits of technology

It reduces air resistance and exhaust power loss, improves the control accuracy of the nozzle ring for regulating airflow, and broadens the applicable scenarios.

✦ Generated by Eureka AI based on patent content.

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Abstract

The application discloses a zero-clearance variable cross-section nozzle ring, comprising a mounting disc and a driving disc, wherein the mounting disc and the driving disc are coaxially arranged, and the mounting disc and the driving disc are rotationally connected through a connecting mechanism; at least two rows of vane assemblies defined as being arranged on different index circles of the mounting disc are rotationally mounted on the end face of the mounting disc; a driven yoke is fixedly mounted on the vane assembly; and a clamping groove for cooperating with the driven yoke to rotate synchronously is arranged on the driving disc. The application has the beneficial effects that: the effect of jointly controlling the air flow channel of the nozzle ring by the multiple-row vane assemblies is the same as that of the single-row vane, but the resistance cross section in unit length is smaller, so that the nozzle ring has lower air resistance and lower waste gas working loss; in addition, the multiple-row vane assemblies are alternately arranged, when the nozzle ring reaches the minimum opening degree, the multiple vane shapes are connected in a head-to-tail mode to achieve the effect of zero clearance, and the application scenarios of the nozzle ring are further widened.
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