Comparison study between two types of nozzles for a turbocharger balancing machine using ANSYS software

Sigismund Becze,Gheorghe Ioan Vuscan,N Balc,D Leordean

doi:10.1051/matecconf/201929904007

Sigismund Becze, Gheorghe Ioan Vuscan + Show 2 more

Open Access

https://doi.org/10.1051/matecconf/201929904007

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Abstract

Turbocharger balancing machines require a specific tooling for spinning the center housing rotating assembly, in order to balance it dynamically. The tooling requires a nozzle to guide the air to the blades of the turbine wheel in order to spin it. Depending on the type of nozzle chosen, the maximum rotational speed achieved and the acceleration curve can be different. In today?s market there is anincreasing demand for a higher turbocharger speed, generally driven by the demand for engine downsizing and for a higher performance. Due to that, turbochargers need to be better balanced, thus requiring a wider measurement range of the unbalanced in order to see how the part performs in all its working range. Consequently, the nozzles used by turbocharger balancing machines need to be verified at a higher speed limit.

Highlights

Today’s turbocharger industry, characterized by an increasing operational speed, one of the challenges is to deliver better balanced components
Turbocharger balancing machines require a specific tooling for spinning the center housing rotating assembly, in order to balance it dynamically
The tooling requires a nozzle to guide the air to the blades of the turbine wheel in order to spin it

Summary

Introduction

Today’s turbocharger industry, characterized by an increasing operational speed, one of the challenges is to deliver better balanced components. Besides all the other challenges, and despite the fact that there are better components available on today’s developing market, the maximum rotational speed of the turbocharger placed on the balancing machine has the same unchanged constrains: 600 kPa, cold air. This is due to safety regulations and to industry standard compressors [3, 4]. In the following pages we analyzed a chambered nozzle similar to those which are widely used in turbocharger balancing machines They have various sizes and different outlet holes. We compared it to a prototype devised by the authors based on observations and various optimizations

Simulation conditions

Calculation and data evaluation

Conclusions