Turbocharger volute assembly

Abstract

The invention belongs to the technical field of turbochargers, and relates to a turbocharger volute assembly. The turbocharger volute assembly comprises a volute, wherein the volute is provided with avolute runner, the volute runner is divided into two separate air inlet channels by a partition wall, the inner side of an air inlet end of the volute runner is provided with a volute tongue, the partition wall is a separation structure which keeps separate air inlet at two sides of the volute runner, the height of the partition wall is changed along with an angle, and the partition wall is a gradually changing partition wall. According to the volute assembly, the efficiency of turbochargers can be improved, the utilization rate of the runner to pulse can be kept, and the risk of high-cycle fatigue can be reduced as much as possible. The turbocharger volute assembly is simple and easy to obtain, and through simulation verification, the efficiency of the vortex ends of the turbochargers can be improved and the risk of high-cycle fatigue can be reduced.

Description

technical field [0001] The invention belongs to the technical field of turbochargers, and relates to a turbocharger volute assembly. Background technique [0002] The volute structure and aerodynamic performance of turbocharger are an important part of turbine research. We hope that the airflow of the intake volute is distributed as evenly as possible in the cross-section, and the pressure loss is minimized, which is conducive to improving the efficiency of the entire supercharger. We also hope that the wetting perimeter of the airflow should be as small as possible to reduce friction losses and increase efficiency. On the other hand, because the exhaust system of the engine presents a pulsed exhaust state, the turbocharger is installed downstream of the exhaust manifold of the engine, so the dual-channel turbocharger separated by a partition wall can avoid the gap between the exhaust cylinders of the engine. Compared with the single-channel supercharger, it can use the pu...

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Problems solved by technology

But on the other hand, due to the existence of the partition wall, the pressure distribution at the turbine inlet will be uneven to a certain extent, which will increase the risk of high-cycle fatigue of the turbine blades.

At present, the national emission requirements are becoming increasingly stringent. How to improve the overall efficiency of the turbocharger brings us new challenges. Therefore, the flow channel design of the double-channel volute not only needs to consider the installation requirements, but also meet the performance and reduce the risk of high stress. , if you want to take into account the above, the room for improvement is very limited

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