Spoiler Hedging Venturi Integrated Mixer

Abstract

The present invention relates to a turbulence-hedging Venturi integrated mixer, the integrated mixer includes a casing, an EGR beam, an EGR impeller, a natural gas beam and a natural gas impeller, and the EGR beam and the EGR impeller are fixed to form an EGR core with a Venturi structure ; After the natural gas beam and the natural gas impeller are fixed to form a whole, they are fixed with the casing; the air enters the air channel from the inlet, and the EGR exhaust gas enters the air channel through the air hole on the wall surface of the EGR core and the central air hole, and then mixes with the air in the air channel, and is lifted by the Venturi structure. The gas flow rate depends on the relationship between the flow rate and the pressure to promote mixing. After passing through the EGR impeller, the gas undergoes a rotation mixing; natural gas passes through the gas holes on the wall surface of the natural gas beam and the gas groove in the center of the natural gas impeller, enters the channel and mixes with the mixed gas mixed in the first rotation, and then a new mixing The gas undergoes secondary rotational mixing under the diversion of the natural gas impeller. The rotational direction of the primary rotational mixing and the secondary rotational mixing are opposite, and the sudden change of the gas flow direction is used to promote the mixing.

Description

technical field [0001] The invention relates to the technical field of natural gas engine intake systems, in particular to a turbulent-flow-contrast type Venturi integrated mixer. Background technique [0002] Exhaust Gas Recirculation (EGR for short) refers to the technology that the internal combustion engine separates a part of the exhaust gas after combustion, and introduces it into the intake side to make it burn again. The main purpose is to reduce the nitrogen oxides (NOx ) and partial load sharing can increase the fuel consumption rate. The oxygen content in the exhaust gas after combustion of the internal combustion engine is extremely low or even non-existent. After the exhaust gas is mixed with the inhalation air, the oxygen concentration in the inhalation air will be reduced, so the following phenomena will occur: the oxygen content lower than the atmosphere is burning When the temperature is lowered, the generation of nitrogen oxides (NOx) will be suppressed. ...

AI Technical Summary

Problems solved by technology

However, the impeller of this patent solution is arranged upstream of the core, which will cause the core to damage the cyclone formed by the impeller, and the streamline shape of the impeller is relatively poor, and the pressure loss is relatively high, which will lead to insufficient air intake of the engine and low engine output power. , the square pores will lead to high addition cost and small effective flow area

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