Vehicle rear processor and rotary vane pipe thereof

Abstract

The invention relates to a vehicle rear processor and a rotary vane pipe thereof. The rear processor comprises a DOC oxidation catalyst, a PDF particle catcher, a urea mixing box and an SCR catalyticbox assembly which are sequentially mounted; the urea mixing box comprises a mixing box housing, a nozzle seat, an air duct and a mixer; the urea mixing box also comprises the rotary vane pipe; the rotary vane pipe is positioned in a urea mixing chamber of the mixing box housing, is matched and mounted at the upper end of the air duct, and is matched and aligned with a bottom injection port of thenozzle seat; the rotary blade pipe is of an integrated structure and comprises a rotary blade framework and rotary blades; the rotary blade framework is a hollow cylindrical framework; the upper endof the rotary blade framework is matched and aligned with the nozzle seat; the lower end of the rotary blade framework is matched and butted with one end of the air duct; and the rotary blades are uniformly distributed along the circumferential side wall of the rotary blade framework and extend obliquely towards the outside of the circumferential side wall of the rotary blade framework. The vehicle rear processor and the rotary vane pipe are simple and reasonable in structural design, and the vaporization effect and uniformity in the urea mixing chamber are good.

Description

technical field [0001] The invention relates to the technical field of vehicle after-processors, in particular to a vehicle after-processor and a rotary vane pipe thereof. Background technique [0002] Research and develop an integrated exhaust after-treatment system device suitable for diesel vehicles. Using CAE software, according to the engine, temperature characteristics, noise spectrum characteristics, airflow pressure characteristics, pollutant emission characteristics, noise reduction, and emission objectives, the design is compatible with the system. The exhaust after-treatment system device that matches the model and engine best, so that the entire system has the reliability of the same lifespan as the whole vehicle, is the specific research and development direction. [0003] However, in the existing vehicle post-processor, the vaporization effect and uniformity in the urea mixing chamber are not good enough, which will cause a large amount of urea crystallization ...

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Problems solved by technology

[0004] In order to solve the problem of a large amount of urea crystallization in the nozzle seat caused by the insufficient vaporization effect and uniformity in the urea mixing chamber existing in the above-mentioned background technology, the present invention proposes a urea mixing chamber with good vaporization effect and uniformity, which can prevent Vehicle post-processor for urea crystallization and its rotary vane tube

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