Three-dimensional nozzle ring vane of variable geometry turbocharger and design method thereof

Abstract

The invention relates to a three-dimensional nozzle ring vane of a variable geometry turbocharger (VGT), comprising a pressure side, a suction side, a vane leading edge and a vane trailing edge, wherein the pressure side corresponds to the concave side of the vane profile; the suction side corresponds to the convex side of the vane profile; the molding lines of the pressure side and the suction side are quadratic curves or biquadratic curves and are not the same; the leading edges of the pressure side and the suction side form the leading edge of the vane; the molding line of the leading edgeof the vane is a quadratic curve and forms the three-dimensional curve leading edge; the trailing edges of the pressure side and the suction side form the trailing edge of the vane; the molding line of the trailing edge of the vane is a quadratic curve, and the height molding line of the trailing edge is identical with the inlet molding line of the turbine vane and the molding line of the trailing edge forms the three-dimensional spatial curve sharp trail. The nozzle ring vane ensures the radial-flow turbine of the VGT to develop into the mixed flow turbine, thus improving the turbine efficiency. The invention also provides a design method of the three-dimensional nozzle ring vane, and the nozzle ring vane designed by the method has higher success rate and lower cost.

Description

technical field [0001] The invention belongs to the technical field of mechanical design, and relates to a three-dimensional nozzle ring vane of a variable geometry turbocharger and a design method thereof. Background technique [0002] Turbocharging is one of the main development directions of piston internal combustion engine technology, and turbocharger has become an essential part of contemporary advanced vehicle internal combustion engines. The internal combustion engine adopts advanced variable geometry turbocharger (VGT), especially its main form of variable nozzle ring turbocharger (VNT), which can further improve performance, such as improving fuel economy, reducing emissions, and increasing engine torque reserve , Improve acceleration, etc. The turbocharger vane nozzle ring is divided into fixed type and adjustable type. The fixed nozzle ring is mainly used for large turbochargers for ships, power generation and other purposes. Limited by factors such as applicat...

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Problems solved by technology

[0007] At present, there have been many patents related to the design of VNT nozzle ring vanes, such as the improved vane of patent 02800079.X variable nozzle turbocharger, the variable vane manufacturing method and variable Vanes, 02819329.6 Manufacturing method of variable vanes in VGS type turbochargers and variable vanes, 03824627.9 Curved vanes for improved turbochargers, 03809928.4 Improved vanes for variable geometry turbochargers Design, 200380111024.4 is used for curved blades of turbochargers, etc., but the working surface of the blades they involve is not a three-dimensional blade surface, but a ruled surface blade-shaped developable curved surface, and its forming method is relatively simple

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