Mixed-flow turbocharger variable nozzle ring

Abstract

The invention discloses a mixed-flow turbocharger variable nozzle ring comprising an active shifting fork (4), a shifting fork plate (3), driven shifting forks (14), driven shifting fork tapered gear shafts (15), vaned tapered gear shafts (5), a nozzle ring vane (8), rolling wheels (13), rolling wheel shafts (12), a mounting plate (1) and a vaned tapered gear shaft positioning sleeve (9). The working surface of the nozzle ring vane (8) is a two-dimensional or three-dimensional surface and concentric spherical surface, the center of the sphere is outside a turbine housing, the bottom and top faces of the nozzle ring vane can be sealed to the vaned tapered gear shaft positioning sleeve (9) and a turbine housing inner gas flow inlet (6) respectively, so that the end of the gas flow inlet matches with a turbine blade (11). The mixed-flow turbocharger variable nozzle ring can well match with turbine wheels of a mixed-flow turbocharger, so that gas flow in the passages of the mixed-flow turbocharger is well organized, the loss of the gas flow is reduced, and efficiency is improved; according to the low speed ratio of the mixed-flow turbocharger, better matching effect is realized accordingly.

Description

technical field [0001] The invention relates to a variable nozzle ring of a turbocharger, in particular to a variable nozzle ring of a mixed flow turbocharger. Background technique [0002] Existing turbochargers for vehicles mainly include ordinary turbocharger (Turbocharger), wastegate turbocharger (Waste Gate Turbocharger, WGT), variable geometry turbocharger (Variable Geometry Turbocharger, VGT), etc. Among them, the main form of variable geometry turbocharger is variable nozzle ring turbocharger (Variable Nozzle Turbocharger, VNT). At present, 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 in small sizes. has grown to a very high level. With the development of turbochargers in the direction of high speed, high reinforcement, wide working range, and miniaturization, the specific speed of turbochargers is required to be higher and h...

AI Technical Summary

Problems solved by technology

[0012] Aiming at the problems existing in the above-mentioned prior art, the present invention provides a nozzle ring area that can be well adjusted, the flow field can be optimized, the gas flow can be efficiently adjusted and controlled, and the high-temperature gas sealing problem can be solved, and it can also meet the requirements of high efficiency and compactness. The variable nozzle ring of the mixed-flow turbocharger that realizes the best match between the turbocharger and the internal combustion engine under various working conditions

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