A variable radial clearance double-entry turbine box

Abstract

The invention discloses a turbine box with variable radial clearance and double inlets, which comprises: an impeller, a left air flow passage, a right air flow passage and a middle partition; The left and right are arranged side by side, the middle partition is located between the left air flow passage and the right air flow passage, and is arranged at the meridian plane of the turbine box; the axial direction of the middle partition is annular, and the inner edge is It is circular and has a spiral outer edge, and the radial gap between the inner edge of the intermediate partition and the inlet of the turbine impeller can gradually increase linearly within the range of 0° to 360° in the circumferential direction of the vortex tongue. The invention reduces the internal gas leakage of the left and right airflow passages of the double-entrance turbine box, and at the same time helps to reduce friction loss, increase the cross-sectional flow area of ​​the turbine box, and reduce or not increase the turbine speed when the engine is running at high speed. The resulting back pressure reduces the fuel consumption of the engine.

Description

technical field [0001] The invention relates to the technical field of turbine boxes, in particular to a variable radial gap double-entry turbine box. Background technique [0002] Turbocharging is one of the important ways to utilize the waste heat of the internal combustion engine. At the same time, the energy of the engine exhaust is recovered through the turbine, which drives the compressor to run and compress the air, thereby increasing the pressure and density of the fresh air entering the engine. Therefore, the use of turbochargers can effectively increase the power and efficiency of internal combustion engines. The development of high-performance turbochargers can effectively realize energy saving and emission reduction, which has important practical significance. [0003] The turbocharger is composed of a compressor and a turbine, and its outer casing includes a compressor volute, a bearing casing and a turbine casing. In order to ensure the continuous supply of e...

AI Technical Summary

Problems solved by technology

In this way, starting from the vortex tongue, the gas on the side with high pressure flows to the other side with low pressure through the radial gap δ, causing the gas to leak to the exhaust pipe that does not supply gas

On the one hand, this reduces the supply of exhaust gas to the turbine wheel, and on the other hand, it also interferes with the normal exhaust of some cylinders of the engine.

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