Staged flow-adjustable turbine shell

Abstract

Disclosed is a staged variable flow turbine housing, comprising a turbine housing body (1), a turbine assembly (4) provided within the turbine housing body (1), and an exhaust intake flow path. The turbine housing body (1) is provided with an intake port in communication with the exhaust intake flow path. An intermediate wall (2) is provided within the exhaust intake flow path, and the exhaust intake flow path is divided into an inner flow path (3) and an outer flow path (6) thereby. A first valve device able to close the outer flow path (6) is provided within the outer flow path (6), and a second valve device able to communicate with or disconnect the inner flow path (3) and the outer flow path (6) is provided on the intermediate wall (2). With the turbine housing, boost requirements in different working conditions of the engine can be satisfied efficiently.

Description

technical field [0001] The invention relates to a turbine casing, in particular to a stage-type adjustable flow turbine casing including a stage-type adjustable flow section, which can effectively meet the supercharging requirements of the engine under different working conditions, and belongs to the field of engine supercharging. Background technique [0002] With the society's increasing requirements on engine performance and emission, turbocharging technology is getting more and more attention. The supercharging technology increases the air intake pressure of the engine and increases the air intake density of the engine, so that the engine can enter more air in the same working volume, so it can correspondingly increase the fuel supply of the working cycle, so that the engine can do more work. The output power and torque of the engine are greatly improved, and the structure of the engine is relatively strengthened, so that the engine with the same power can adopt a smalle...

AI Technical Summary

Problems solved by technology

However, many of the dual runners of the current double runner turbine housing are arranged side by side, that is, the arc lengths of the two runners are equal, such as patent 201010279953.8, so that when the exhaust gas flows in the runners, the contact area with the runner wall is large, and the flow loss is large.

In addition, most of the currently known dual-channel turbine casings have only two working modes, namely, low-speed working conditions and high-speed working conditions, such as patent 201010279953.8 and patent 201010280157.6, which makes the exhaust gas utilization rate unsatisfactory in some medium-speed working conditions

Finally, the known double-channel turbine casing structure, especially the intermediate wall, has high casting requirements, and the existing casting process is not easy to meet the requirements

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