Center diversion type venturi integrated mixer

Abstract

The invention relates to a center diversion type venturi integrated mixer. The center diversion type venturi integrated mixer comprises a shell, an EGR core, a cross arm, a fixing pin, a natural gas cross beam and a natural gas impeller. Air enters an air channel from an inlet, EGR waste gas sequentially passes through wall face round holes in the EGR core and a cross arm center air hole and then enters the air channel to be mixed with the air, the gas flow speed is increased by means of a venturi structure formed in the EGR core, and mixing is promoted by means of the relation between the flow speed and pressure; a central diversion plate is additionally arranged at a flaring of the venturi structure in the EGR core, so that gas is rotationally mixed once; and natural gas sequentially passes through wall face round holes in the natural gas cross beam and a gas groove formed in the center of the natural gas impeller and then enters the air channel to be mixed with mixed gas in a secondary rotating mode, the rotating direction of primary rotating mixing and the rotating direction of secondary rotating mixing are opposite, the mixed gas obtained after primary rotating mixing is reversely disturbed through the natural gas impeller, mixing is promoted through hedging, meanwhile, rotating gas flow is formed, and the mixing uniformity is improved.

Description

technical field [0001] The invention relates to the technical field of natural gas engine intake systems, in particular to a central diversion 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. When t...

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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