Turbocharger

Abstract

The invention relates to a turbocharger. The turbocharger comprises a volute, a transition connector is fastened and connected to the installation face of the volute, a partition wall is arranged in an inner cavity of the transition connector, and a channel is formed in the bottom face of the inner cavity of the transition connector. Firstly, due to the fact that the partition wall is arranged, bypass flow and main flow can hardly be mixed, so that entropy production is reduced; in addition, due to the fact that the special channel is design, flowing of the bypass flow can be smoother compared with the flowing of the bypass flow under the condition that the special channel is not formed, turbulence intensity is lowered, and entropy production can be reduced as well; efficiency can be lowered due to entropy production, and efficiency can be lowered when entropy production is reduced. Secondly, due to the existence of the partition wall and the special channel, mixing of the bypass flow and the main flow is farther away from an impeller compared with the traditional design that no partition wall or channel is formed, and the work capacity of the impeller can be lowered although the backpressure of the impeller can still be increased. The farther the mixing position is, the smaller the backpressure is, and therefore the lowering amplitude of the work capacity is smaller.

Description

technical field [0001] The invention relates to a turbocharger. Background technique [0002] A turbocharger is an accessory of a reciprocating internal combustion engine, which can use the energy of the high-temperature and high-pressure gas discharged from the internal combustion engine to inhale more fresh air into the combustion chamber. [0003] The energy in the combustion chamber of the internal combustion engine has three kinds of consumption, one is the work done on the piston, that is, the output work of the internal combustion engine spindle; the other is the energy dissipated by heat transfer through the inner wall of the combustion chamber; the third is the energy of the exhaust gas. Under the condition of a certain fuel consumption rate, in order to allow the main shaft of the internal combustion engine to output more work, we hope that the energy in the exhaust gas discharged by it should be as small as possible, but in order to ensure that the internal combus...

AI Technical Summary

Problems solved by technology

This way when two air streams are mixed, one is a high temperature gas and the other is a low temperature gas, due to the huge temperature difference, when they mix, it will cause a huge increase in entropy, and the increase in entropy will cause a decrease in efficiency

[0009] That is to say, there are three reasons for the drop. One is that the bypass air flow no longer participates in the work. The second is that the back pressure of the impeller increases due to the mixing of the bypass air flow and the mainstream flow, which leads to a decrease in the working capacity of the impeller. The last one is the bypass air flow Mixing with mainstream leads to entropy increase

[0010] In most cases, only the first factor is considered in engineering, but in fact the influence of the latter two factors is also very large

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