Wall-surface-flow-guide type Venturi integrated mixer

Abstract

The invention relates to a Wall-surface-flow-guide type Venturi integrated mixer. The integrated mixer comprises an outer shell, an EGR core, a cross arm, a fixing pin, a natural gas cross beam, a natural gas impeller and a natural gas straight joint, wherein the EGR core, the natural gas cross beam and the natural gas impeller are sequentially and fixedly arranged in the outer shell in the direction of a gas channel; air enters the gas channel from an inlet, EGR waste gas sequentially passes through a wall-surface round hole of the EGR core and a central gas hole of the cross arm and then enters the gas channel to be mixed with the air, the flow speed of the gas is increased by means of a Venturi structure formed in the EGR core, and mixing is promoted by means of the relationship between the flow speed and pressure; a wall surface flow guide plate is additionally arranged at a flaring of the Venturi structure in the EGR core, so that the gas is rotationally mixed; and the natural gas sequentially passes through a wall-surface round hole of the natural gas cross beam and a central gas groove of the natural gas impeller and then enters the gas channel to be mixed with the mixed gas, then new mixed gas is disturbed through the natural gas impeller, and the rotating strength is enhanced, so that the mixing uniformity is further improved in a follow-up pipeline.

Description

technical field [0001] The invention relates to the technical field of natural gas engine intake systems, in particular to a wall-guided 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 the combusti...

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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