Axial flow turbocharger adjustable nozzle device

Abstract

The invention discloses an adjustable nozzle device of an axial flow turbocharger. The adjustable nozzle device comprises a fixed base, a motor, an adjusting arm, guide vane rotating arms, a rotating ring and multiple guide vanes. One of the multiple guide vanes is a special guide vane, and the rest of the guide vanes are conventional guide vanes. The guide vanes include vane bodies and vane handles connected with the vane bodies. The vane handles are installed on the fixed base. The vane handles of the guide vanes are fixedly connected with one ends of the guide vane rotating arms. The other ends of the guide vane rotating arms are connected to the rotating ring. The guide vanes and the guide vane rotating arms can rotate around the axes of the vane handles. The outermost end of the vane blade of the special guide vane is fixedly connected with the adjusting arm. The motor can drive the adjusting arm to rotate around the vane handles, and therefore the special guide vane is driven to rotate. According to the adjustable nozzle device of the axial flow turbocharger, the rotating ring does not need to be additionally fixed, space is saved, the structure is more compact, a joint bearing connecting manner is adopted between the guide vane rotating arms and the rotating ring, abrasion of a workpiece is relieved, and the service life is prolonged.

Description

technical field [0001] The invention relates to an adjustable nozzle device of an axial flow turbocharger. Background technique [0002] At present, with the development of supercharger technology, only keeping the engine at high performance parameters at the calibration point can no longer meet the requirements of engine energy saving and emission reduction, and the adjustable nozzle technology of the supercharger can well solve the problem of The operating requirements under certain conditions, especially in the case of large changes in the external ambient temperature and altitude, make the operating line of the diesel engine always run in the high-efficiency zone of the turbocharger compressor characteristic curve. This technology will become the development trend of turbocharger technology in the future, and it is widely used in the field of small engines, mainly in radial flow or mixed flow turbochargers. At present, in the turbocharger industry of high-power medium-s...

AI Technical Summary

Problems solved by technology

The existing turbocharger adjustable nozzle device drives the motor to drive the rotating ring coaxial with the impeller to rotate the rotating ring and then drive the guide vanes to rotate. This transmission method needs to fix the rotating ring so that the external structure of the impeller It is relatively complicated, so that the guide vane arm must move relative to the rotating ring during the rotation process, so the sliding seat is usually installed in the rotating ring. This direct sliding fit makes the sliding seat easy to wear and affects the accuracy of angle adjustment. sex

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