Nozzle ring for turbocharger

Abstract

The invention discloses a nozzle ring for a turbocharger. The nozzle ring comprises a lining plate, a mounting disc and a shifting fork disc, fixed distance shafts and vanes are arranged between the lining plate and the mounting disc at intervals, and the shifting fork disc is mounted on the outer circle of the mounting disc in a sleeving mode and can rotate around the mounting disc to do concentric rotation; and the shifting fork disc is movably connected with one ends of connecting plates through pin shafts in a spaced mode, the other ends of the connecting plates are movably connected withone ends of shifting forks through pin shafts, the other ends of the shifting forks are fixedly connected with one ends of vane shafts, and the other ends of the vane shafts penetrate through the mounting disc and are fixedly connected with the vanes and fixed to the lining plate. According to the nozzle ring for the turbocharger, the shifting fork disc and the outer circle of the mounting disc are directly matched for radial positioning, cylindrical grooves are not required to be formed in the shifting fork disc to be matched with one ends of the shifting forks for radial positioning of the shifting fork disc, but the shifting forks are driven by adopting the mode of rivet-connected connecting plates, the structure is more compact, machining is more simple and convenient, the machining accuracy is higher, and vane synchronization is more consistent.

Description

technical field [0001] The present invention relates to a turbocharger, in particular to a nozzle ring for a turbocharger. Background technique [0002] As we all know, a turbocharger is a product used to boost the air intake of an internal combustion engine and improve the working efficiency of the internal combustion engine. It is driven by the exhaust gas discharged from the internal combustion engine. The vanes at the compressor end of the turbocharger installed on the shaft on the intake pipe of the internal combustion engine rotate the intake air to increase the intake pressure, improve the working conditions of the internal combustion engine, and increase the power of the internal combustion engine. Among them, the blades in the variable section nozzle ring It is a component that changes the size of the exhaust section by rotating at a certain angle, thereby adjusting the exhaust pressure of the turbocharger, controlling the speed of the turbocharger, and then control...

AI Technical Summary

Problems solved by technology

[0003] The existing turbocharger variable section nozzle ring still has the following problems in operation: the shift fork drives the shift fork, and the shift fork drives the blades to swing. The radial positioning of the fork plate rotation is achieved by the sliding fit of the guide wheels arranged at fixed intervals between the guide wheel pins on the mounting plate. After working for a certain period of time, the wear gap between each set of arc-shaped grooves and the guide wheel increases, and the radial runout of the fork plate rotation increases, resulting in an increase in the rotation angle error of the blade driven by the fork plate to swing, and the blade rotates The initial time of the fork is inconsistent with the rate of angular rotation, resulting in a reduction in the synchronization of the blade rotation; and one end of the fork is fixedly connected to the blade, and the other end of the fork is embedded in a cylindrical groove on the fork plate. When the disc rotates, because the contact gap between the cylindrical groove and the other end of the shift fork is not uniform, after a certain period of work, the swing of the shift fork will vary from fast to slow, causing the blades to not rotate synchronously.

The existence of these two problems will cause uneven air intake per unit time, thus affecting the working performance of the engine

Images