High-efficiency mixed-flow turbine

Abstract

The invention discloses a high-efficiency mixed-flow turbine which comprises turbine blades (1), a hub (2) and a turbine disk (3), wherein the center of the turbine disk is axially provided with the hub (2); the hub (2) is provided with the turbine blades (1) in the radial direction; and each turbine blade (1) is composed of a convex surface (4) and a concave surface (5). The shape parameters of the hub is as follows: the turbine hub bottom arc radius R2 is 92mm, the turbine inlet hub inclination angle alpha 2 is 30 degrees, the turbine outlet hub inclination angle alpha 3 is 6.11 degrees, the turbine outlet hub diameter Do is phi 58mm, the turbine inlet hub diameter Db is phi 145mm, and the turbine blade axial height Zm is 76.5mm. The number of the turbine blades is twelve, and the profile curve of the blades is in a double-equation mode. By using the reasonable hub and hub hood wire, the efficiency of the turbocharger is enhanced, the oil consumption is lowered, the use cost is saved, and the high-efficiency mixed-flow turbine can be completely used as a substitute for imported goods.

Description

Technical field: [0001] The invention belongs to the technical field of turbochargers for diesel engines, in particular to a high-efficiency mixed flow turbine Background technique [0002] The turbine is a key part of the turbocharger that rotates at high temperature at high speed. Its function is to convert the exhaust gas energy of the internal combustion engine into mechanical work that drives the compressor to rotate at high speed coaxially. Common turbines have three types: axial flow, radial flow, and mixed flow. As far as the working method is concerned, the mixed flow type is a mixed mode between the axial flow type and the radial flow type. The turbocharger is more effective, but the disadvantage is that the design is difficult and prohibitive. Invention content: [0003] The invention provides a high-efficiency mixed-flow turbine, which is used to improve the efficiency of the existing turbine, starting from reducing the gas incident loss, turning loss, and res...

AI Technical Summary

Problems solved by technology

[0003] The invention provides a high-efficiency mixed-flow turbine, which is used to solve the existing problem of improving the efficiency of the turbine, starting from reducing the gas incident loss, turning loss, and residual speed loss, under the premise of reasonable blade curve and ensuring blade strength Reasonable blade thickness distribution law, and the problem of determining the hub and hub line according to the gas flow field distribution

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