CN216665716U - Fuel nozzle for DPF regeneration system - Google Patents

Abstract

The utility model provides a fuel nozzle for a DPF regeneration system, which comprises a bottom plate, a fuel inner core nozzle and an air outer ring nozzle, wherein the air outer ring nozzle comprises an air guide pipe and an air cavity shell fixed on the bottom plate, an air inlet of the air cavity shell is connected with the air guide pipe, the other end of the air guide pipe is connected with an air source, an air guide ring is arranged below the air cavity shell, the fuel inner core nozzle comprises a fuel guide fluid and a fuel inner ring nozzle, the fuel inner ring nozzle is arranged in the air cavity shell, the fuel guide fluid is arranged above the fuel inner ring nozzle to guide fuel into the fuel inner ring nozzle, and outlets are arranged at the bottoms of the air guide ring and the fuel inner ring nozzle. The fuel oil atomizer has the advantages of simple structure and reasonable design, and after the fuel oil is sprayed out from the inner ring nozzle and atomized, the fuel oil is mixed with air at the opening of the guide ring to enhance the atomization mechanism effect and reduce the spraying amount.

Description

Fuel nozzle for DPF regeneration system

Technical Field

The utility model relates to a fuel nozzle, in particular to a fuel nozzle for a DPF regeneration system.

Background

The particulate matter emission of diesel engines seriously pollutes the environment and endangers human health, and the purification technology thereof is always the direction of people research. Particulate matter trap dpf (diesel particulate filter) is the most effective aftertreatment device for controlling particulate matter emissions from diesel engines, and is a wall-permeable filter mounted on the exhaust pipe of a diesel engine and capable of trapping Particulate Matter (PM) before it enters the atmosphere. The DPF, which effectively reduces the emission of particulate matter, first traps particulate matter in exhaust gas and then oxidizes the trapped particulate matter to regenerate the DPF. DPF regeneration is a process of recovering the filtering performance of a DPF by periodically removing deposited particulate matter, because the increase of particulate matter in the DPF during a long-term operation causes an increase in the back pressure of an engine and a decrease in the performance of the engine. With the stricter emission regulations, the application of the method is more and more extensive. The fuel nozzle is needed to be used for exhaust pipe injection in DPF active regeneration, the fuel nozzle of the DPF in the prior art is basically a single fuel nozzle, and the phenomena of poor atomization effect and serious carbon deposition exist in the use process, so that the normal use of the fuel nozzle is influenced, and the service life of the fuel nozzle is shortened.

SUMMERY OF THE UTILITY MODEL

Aiming at the defects of the prior art, the utility model provides the fuel nozzle for the DPF regeneration system, which is simple in structure and convenient to use, enhances the atomization effect through air mixing, and reduces the injection amount.

The technical scheme provided by the utility model is as follows: the utility model provides a fuel nozzle for DPF regeneration system, includes bottom plate, fuel inner core nozzle and air outer loop nozzle, air outer loop nozzle includes the air honeycomb duct and fixes air chamber shell on the bottom plate, the air inlet and the air honeycomb duct of air chamber shell are connected, the other end and the air supply of air honeycomb duct are connected, air water conservancy diversion ring is installed to the below of air chamber shell, fuel inner core nozzle includes that the fuel draws fluid and fuel inner ring spout, fuel inner ring spout sets up in the air chamber shell, the fuel draws the fluid to install in fuel inner ring spout top, introduces fuel inner ring spout with the fuel, the bottom of air water conservancy diversion ring and fuel inner ring spout is equipped with the export.

Furthermore, a filter screen is arranged at an oil inlet above the fuel oil drainage body, a vortex cavity is arranged inside the fuel oil inner ring nozzle, and fuel oil flows out of a wall hole of the side wall of the lower end after passing through the drainage body and then flows into the vortex cavity through the wall hole of the vortex cavity.

Furthermore, an air pipe joint is arranged above the air guide pipe and is used for being connected with an air source.

Furthermore, the bottom plate is an ear seat plate, and the bottom plate is provided with a mounting hole.

The utility model has simple structure and convenient use, integrates the fuel oil inner core nozzle and the air outer ring nozzle, fuel oil is sprayed out by the inner ring nozzle and atomized and then mixed with air of the guide ring port to enhance the atomization effect, the spraying amount is reduced, the outlet of the fuel oil nozzle is connected with the exhaust pipe of the DPF regeneration system, the air increases the combustion-supporting effect, and the temperature in the DPF is improved by the combustion of the fuel oil, so that the oxidation combustion of particles in the DPF is realized, the smooth regeneration of the DPF is ensured, and the utility model has higher practical value.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a side view of FIG. 1;

FIG. 3 is a schematic cross-sectional view taken along the line A-A in FIG. 2;

FIG. 4 is an enlarged schematic view of the structure at A in FIG. 3;

in the figure: the fuel oil vortex flow-guiding device comprises a base plate 1, an air flow-guiding pipe 2, an air cavity shell 3, an air flow-guiding ring 4, a fuel oil flow-guiding body 5, a fuel oil inner ring nozzle 6, a fuel oil outlet 7, a filter screen 8, a vortex cavity 9 and an air pipe joint 10.

Detailed Description

The present invention will be further described with reference to the following detailed description, wherein the drawings are for illustrative purposes only and are not intended to be limiting, wherein certain elements may be omitted, enlarged or reduced in size, and are not intended to represent the actual dimensions of the product, so as to better illustrate the detailed description of the utility model.

In the description of the present invention, it should be noted that the terms "front", "back", "upper", "lower", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "disposed," "connected," and the like are to be construed broadly, and for example, "connected" may be a fixed connection, a detachable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

The fuel nozzle for the DPF regeneration system as shown in FIGS. 1-3 comprises a bottom plate 1, a fuel core nozzle and an air outer ring nozzle, wherein the air outer ring nozzle comprises an air guide pipe 2 and an air cavity shell 3 fixed on the bottom plate 1, an air inlet of the air cavity shell 3 is connected with the air guide pipe 2, the other end of the air guide pipe 2 is connected with an air source, an air guide ring 4 is installed below the air cavity shell 3, the fuel core nozzle comprises a fuel guide fluid 5 and a fuel inner ring nozzle 6, the fuel inner ring nozzle 6 is arranged in the air cavity shell 3, the fuel guide fluid 5 is installed above the fuel inner ring nozzle 6 and used for guiding fuel into the fuel inner ring nozzle 6, and outlets 7 are arranged at the bottoms of the air guide ring 4 and the fuel inner ring nozzle 6.

A filter screen 8 is arranged at an oil inlet above the fuel oil guide body 5, a vortex cavity 9 is arranged inside the fuel oil inner ring nozzle 6, and fuel oil flows out from a wall hole of the side wall of the lower end after passing through the guide body and then flows into the vortex cavity through a wall hole of the vortex cavity.

An air pipe joint 10 is arranged above the air guide pipe 2 and is used for being connected with an air source. The base plate 1 is an ear seat plate, and the base plate 1 is provided with a mounting hole.

When the nozzle is used, oil is introduced into the inner cavity of the nozzle from the connecting port at the upper end of the drainage body, impurities are filtered by the filter screen, and then the oil flows out of the transverse wall hole at the lower end and flows to the periphery of the outer wall of the nozzle of the fuel inner ring. The fuel inner ring nozzle is internally provided with a vortex cavity, and oil is guided into the vortex cavity from a side wall hole of the internally arranged vortex cavity to form annular central pressure vortex flow, and is sprayed out from the converging nozzle to form atomization characteristics. The air outer ring nozzle is introduced into the MU control unit by an air source of air pressure on the vehicle, and is connected with the air pipe joint through a connecting pipeline, and the air source is opened when the vehicle is started. The gas is guided out through the air outer ring opening and is combined with fine grease particles atomized by the fuel nozzle for diffusion again, atomization is assisted, the physical effect of combustion of the atomized fuel in the DPF is promoted, and the unit injection amount is reduced.

The above description is only a detailed description of specific embodiments of the present invention, and should not be taken as limiting the utility model, and any modifications, equivalents, improvements, etc. made on the design concept of the present invention should be included in the protection scope of the present invention.

Claims (4)

1. A fuel injector for a DPF regeneration system, characterized by: including bottom plate (1), fuel inner core nozzle and air outer loop nozzle, air outer loop nozzle includes air honeycomb duct (2) and fixes air chamber shell (3) on bottom plate (1), the air inlet and the air honeycomb duct (2) of air chamber shell (3) are connected, the other end and the air supply of air honeycomb duct (2) are connected, air water conservancy diversion ring (4) are installed to the below of air chamber shell (3), fuel inner core nozzle includes that fuel draws fluid (5) and fuel inner ring spout (6), fuel inner ring spout (6) set up in air chamber shell (3), fuel is drawn fluid (5) and is installed in fuel inner ring spout (6) top for introduce fuel inner ring spout (6), the bottom of air water conservancy diversion ring (4) and fuel inner ring spout (6) is equipped with export (7).

2. The fuel injector for DPF regeneration system of claim 1, wherein: a filter screen (8) is arranged at an oil inlet above the fuel oil leading fluid (5), a vortex cavity (9) is arranged inside the fuel oil inner ring nozzle (6), and fuel oil flows out from a wall hole of the side wall of the lower end after passing through the leading fluid and then flows into the vortex cavity through the wall hole of the vortex cavity.

3. The fuel injector for DPF regeneration system of claim 1, wherein: an air pipe joint (10) is arranged above the air guide pipe (2) and is used for being connected with an air source.

4. The fuel injector for DPF regeneration system of claim 1, wherein: the base plate (1) is an ear seat plate, and the base plate (1) is provided with a mounting hole.

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