Mixed flow turbocharger with variable nozzle ring

Abstract

The invention discloses a mixed flow turbocharger with a variable nozzle ring which comprises a compressor impeller, a compressor casing, a bearing body, an actuating mechanism, a bearing, a nozzle ring blade, a turbine casing, a turbine shaft and a turbine impeller, wherein the actuating mechanism comprises an actuator, a rocker arm component, a driving ring and spatial link mechanisms; the actuator is connected with the rocker arm component, the rocker arm component is connected with the spatial link mechanisms, and the spatial link mechanisms are connected with the nozzle ring blade; the spatial link mechanisms are annularly arranged in the spherical shell formed by the bearing body and the turbine casing; the right angle shaped by the central line of the radial section outlet of the turbine casing and the axial direction can be changed into an obtuse angle. According to the invention, the top surface and the bottom surface of the nozzle ring blade are designed to concentric circular arcs, and the opening of the mixed flow turbine nozzle ring blade can be adjusted to rotate by utilizing the spatial link mechanisms, thus realizing the best matching of the mixed low turbocharger with the variable nozzle ring and each changing working condition of the internal combustion engine.

Description

technical field [0001] The invention relates to the technical field of a variable geometry turbocharger (VGT), in particular to a mixed flow turbocharger (VNMT) with a variable nozzle ring. Background technique [0002] Turbochargers can be divided into radial turbochargers and mixed flow turbochargers, and can be divided into variable geometry turbochargers (VGT) and non-adjustable geometry turbochargers; [0003] Radial-flow turbochargers are widely used in automotive turbochargers. The reason is that radial-flow turbochargers have simple structure, low cost, good reliability, and high efficiency when they are small in size. The technology has been developed to a very high level. s level. With the development of turbochargers in the direction of high speed, wide working range, and miniaturization, the specific speed of turbochargers is required to be higher and higher, which has exceeded the range of the highest efficiency of radial turbines. Both experiments and theory ...

AI Technical Summary

Problems solved by technology

[0010] The invention provides a mixed-flow turbocharger (VNMT) with a variable nozzle ring, which can well adjust the area of ​​the nozzle ring, thereby regulating and controlling the flow of gas, and at the same time solves the problem of high-temperature gas sealing and meets the requirements of compactness , to achieve the best match between the supercharger and the internal combustion engine under various working conditions

Images