An adjustable air clamping direct injection spraying device

Abstract

The present invention discloses an adjustable air-entrained direct injection device, which belongs to the field of internal combustion engine accessories, and solves the problem that the existing air-entrained direct injection device needs to replace the adapter separately for engines with different displacements, resulting in reduced versatility of parts. It includes a fuel nozzle, an air-entrained nozzle and an adapter, wherein the adapter is respectively provided with an oil passage, an upper premixing chamber, an adjustment hole and a lower premixing chamber, wherein the oil passage, the upper premixing chamber, the adjustment hole and the lower premixing chamber are connected in sequence, wherein the oil passage is connected with the oil injection port of the fuel nozzle, wherein the lower premixing chamber is connected with the air inlet of the air-entrained nozzle, wherein one side of the adapter is also provided with a compressed air interface connected with the lower premixing chamber, wherein a detachable adjustment column is sealed and installed in the adjustment hole, wherein the adjustment column is provided with a flow channel connecting the upper premixing chamber and the lower premixing chamber. The adjustable air-entrained direct injection device of the present invention matches different engine requirements, and greatly improves the versatility of parts and the accuracy of preliminary test verification.

Description

Technical Field

[0001] The present invention relates to the field of internal combustion engine accessories, and more specifically, it relates to an adjustable air-entraining direct injection spraying device. Background Art

[0002] The air-entraining direct injection spraying system is a new type of fuel injection system. Under lower oil pressure, it uses the effects of gas-liquid two-phase cavitation, etc. to atomize fuel into extremely fine droplets at high speed and evaporate quickly, achieving a good atomization effect for heavy oil. The air-entraining direct injection spraying system is characterized by consisting of a fuel nozzle, an air-entraining nozzle, and an adapter body. The adapter body is designed with mounting holes for two nozzles, an internal oil passage, and an air passage. The structural dimensions of its internal oil passage directly affect the spraying characteristics of the air-entraining direct injection system. Engines with different displacements need to be matched with different adapter bodies, while the fuel nozzle and the air-entraining nozzle generally can be compatible with engines within a certain displacement range. Therefore, the air-entraining direct injection systems of engines with different displacements need to separately replace the adapter body, resulting in a reduction in the universality of parts. Especially during the preliminary test and verification stage, the adapter body needs to be continuously replaced, affecting the accuracy and efficiency of test verification. Summary of the Invention

[0003] The technical problem to be solved by the present invention is in view of the above deficiencies of the prior art. The object of the present invention is to provide an adjustable air-entraining direct injection spraying device, which can match different engine requirements, greatly improving the universality of parts and the accuracy of preliminary test verification.

[0004] The technical solution of the present invention is as follows: An adjustable air-entraining direct injection spraying device includes a fuel nozzle, an air-entraining nozzle, and an adapter body. The fuel nozzle and the air-entraining nozzle are respectively installed at both ends of the adapter body. An oil passage, an upper premixing chamber, an adjustment hole, and a lower premixing chamber are respectively arranged in the adapter body. The oil passage, the upper premixing chamber, the adjustment hole, and the lower premixing chamber are connected in sequence. The oil passage is connected to the fuel injection port of the fuel nozzle, and the lower premixing chamber is connected to the air inlet of the air-entraining nozzle. A compressed air interface connected to the lower premixing chamber is further arranged on one side of the adapter body. A detachable adjustment column is hermetically installed in the adjustment hole, and a flow passage connecting the upper premixing chamber and the lower premixing chamber is arranged in the adjustment column.

[0005] As a further improvement, fuel nozzle mounting holes and air-entraining nozzle mounting holes are respectively arranged at both ends of the adapter body. The fuel nozzle is detachably installed in the fuel nozzle mounting hole, and the air-entraining nozzle is detachably installed in the air-entraining nozzle mounting hole.

[0006] Furthermore, sealing rings are respectively arranged between both ends of the fuel nozzle and the inner wall of the fuel nozzle mounting hole, and between the air-entraining nozzle and the inner wall of the air-entraining nozzle mounting hole.

[0007] Furthermore, one end of the air-entraining nozzle is slidably inserted into the air-entraining nozzle mounting hole, and a connecting flange is provided on the periphery of the adapter, and the connecting flange is connected to the engine cylinder head by bolts.

[0008] Furthermore, the fuel nozzle is slidably inserted into the fuel nozzle mounting hole, and a pressing sleeve for pressing the fuel nozzle is provided on the adapter outside the fuel nozzle mounting hole, and the pressing sleeve is connected to the adapter by a fastening screw.

[0009] Furthermore, the compression sleeve is provided with an oil pipe interface which is connected with the oil inlet of the fuel nozzle.

[0010] Furthermore, the axis centerline of the oil channel is perpendicular to the axis centerline of the upper premixing chamber.

[0011] Furthermore, the axis lines of the upper premixing chamber, the regulating hole, the flow channel, and the lower premixing chamber coincide with each other.

[0012] Further, the diameter of the oil channel is smaller than the diameter of the upper premixing chamber, the diameter of the flow channel is smaller than the diameter of the upper premixing chamber, and the diameter of the upper premixing chamber is smaller than the diameter of the lower premixing chamber.

[0013] Furthermore, the adjusting column is a T-shaped screw, the adjusting hole is a threaded hole, the screw rod of the T-shaped screw is threadedly connected in the threaded hole, and the flow channel is arranged through the center of the T-shaped screw.

[0014] Beneficial Effects

[0015] Compared with the prior art, the present invention has the following advantages:

[0016] 1. The adjustable air-entrained direct injection device of the present invention, when working, the fuel nozzle sprays the fuel into the adapter, enters the upper premixing chamber through the oil channel in the adapter, disperses and mixes in the upper premixing chamber, and then enters the lower premixing chamber through the flow channel inside the regulating column. The fuel and air are premixed in front of the air-entrained nozzle, and then enter the air-entrained nozzle. The pipeline corresponding to the compressed air interface provides high-pressure air to provide injection pressure for the air-entrained nozzle to achieve atomized spraying of the fuel and air. By arranging a detachable regulating column with a flow channel in the regulating hole in the adapter, when different displacements are required, different engine requirements can be matched by replacing the regulating column with different flow channel apertures, which greatly improves the versatility of components and the accuracy of preliminary test verification.

[0017] 2. The fuel nozzle and the air-entrained nozzle of the adjustable air-entrained direct injection device of the present invention are both installed in the adapter in a detachable manner, which is convenient for disassembly, assembly and maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of the present invention;

[0019] Figure 2 is a schematic cross-sectional structure diagram of the present invention;

[0020] Figure 3 is a schematic structure diagram of the aptamer in the present invention;

[0021] Figure 4 is a schematic cross-sectional structure diagram of the aptamer in the present invention;

[0022] Figure 5 is a schematic cross-sectional structure diagram of the adjusting column in the present invention.

[0023] Wherein: 1 - fuel nozzle, 2 - air-entraining nozzle, 3 - aptamer, 4 - oil passage, 5 - upper premixing chamber, 6 - adjusting hole, 7 - lower premixing chamber, 8 - compressed air interface, 9 - adjusting column, 10 - flow passage, 11 - fuel nozzle mounting hole, 12 - air-entraining nozzle mounting hole, 13 - sealing ring, 14 - compression sleeve, 15 - fastening screw, 16 - fuel pipe interface, 17 - connecting flange. Specific embodiments

[0024] The present invention will be further described below in conjunction with specific embodiments in the accompanying drawings.

[0025] Refer to Figures 1-5 As shown, an adjustable air-entraining direct injection device includes a fuel nozzle 1, an air-entraining nozzle 2 and an aptamer 3. Among them, the fuel nozzle 1 and the air-entraining nozzle 2 are respectively installed at both ends of the aptamer 3. An oil passage 4, an upper premixing chamber 5, an adjusting hole 6 and a lower premixing chamber 7 are respectively provided in the aptamer 3. The oil passage 4, the upper premixing chamber 5, the adjusting hole 6 and the lower premixing chamber 7 are connected in sequence. The position of the oil passage 4 corresponds to the position of the fuel nozzle 1, and the oil passage 4 is communicated with the injection port of the fuel nozzle 1. The position of the lower premixing chamber 7 corresponds to the position of the air-entraining nozzle 2, and the lower premixing chamber 7 is communicated with the air inlet of the air-entraining nozzle 2. A compressed air interface 8 communicated with the lower premixing chamber 7 is further provided on one side of the aptamer 3 for connecting with the pipeline of an air compressor. A detachable adjusting column 9 is hermetically installed in the adjusting hole 6, and a flow passage 10 for communicating the upper premixing chamber 5 and the lower premixing chamber 7 is provided in the adjusting column 9.

[0026] The adjustable air-entrained direct injection device of the present invention, when working, the fuel nozzle 1 sprays the fuel into the adapter 3, enters the upper premixing chamber 5 through the oil channel 4 in the adapter 3, is dispersed in the upper premixing chamber 5, and then enters the lower premixing chamber 7 through the flow channel 10 inside the adjusting column 9, and the fuel and air are premixed in front of the air-entrained nozzle 2, and then enter the air-entrained nozzle 2, and the pipeline corresponding to the compressed air interface 8 provides high-pressure air to provide injection pressure for the air-entrained nozzle 2, so as to realize the atomized spraying of the fuel and air, and by arranging a detachable adjusting column 9 with a flow channel 10 in the adjusting hole 6 in the adapter 3, when different displacements are required, the adjusting column 9 with different flow channel apertures can be replaced to match different engine requirements, thereby greatly improving the versatility of components and the accuracy of preliminary test verification.

[0027] Preferably, a fuel nozzle mounting hole 11 and an air nozzle mounting hole 12 are respectively provided at both ends of the adapter 3 , wherein the fuel nozzle 1 is detachably mounted in the fuel nozzle mounting hole 11 , and the air nozzle 2 is detachably mounted in the air nozzle mounting hole 12 .

[0028] In the adjustable air-entrained direct injection device of this embodiment, the fuel nozzle 1 and the air-entrained nozzle 2 are both installed in the adapter 3 in a detachable manner, which is convenient for disassembly, assembly and maintenance.

[0029] Preferably, sealing rings 13 are provided between both ends of the fuel nozzle 1 and the inner wall of the fuel nozzle mounting hole 11, and between the air nozzle 2 and the inner wall of the air nozzle mounting hole 12. The sealing rings 13 are O-rings to ensure the sealing of the fuel or atomized gas.

[0030] Preferably, one end of the air-entraining nozzle 2 is slidably inserted into the air-entraining nozzle mounting hole 12, and a connecting flange 17 is provided on the periphery of the adapter 3. The connecting flange 17 is connected to the engine cylinder head by bolts. The air-entraining nozzle 2 is inserted into the air-entraining nozzle mounting hole 12, and then the other end of the air-entraining nozzle 2 is inserted into the engine cylinder head. The connecting flange 17 is connected to the engine cylinder head by bolts, so that the air-entraining nozzle 2 can be pressed and fixed between the adapter 3 and the engine cylinder head, thereby realizing the rapid installation of the air-entraining nozzle 2. In order to prevent the air-entraining nozzle 2 from rotating, a pressing plate can be provided on one side of the air-entraining nozzle 2, and a Z-shaped elastic sheet (such as a spring) can be provided at the bottom of the pressing plate. Figure 2 As shown), after the air-entrained direct injection device is installed on the engine, the elastic sheet can be used to squeeze the engine surface to prevent the air-entrained nozzle 2 from loosening.

[0031] Preferably, the fuel nozzle 1 is slidably inserted into the fuel nozzle mounting hole 11. A compression sleeve 14 for pressing the fuel nozzle 1 is provided on the adapter body 3 outside the fuel nozzle mounting hole 11. The compression sleeve 14 is connected to the adapter body 3 by fastening screws 15. During installation, after inserting the fuel nozzle 1 into the fuel nozzle mounting hole 11, the compression sleeve 14 is then covered on the adapter body 3 outside the fuel nozzle 1, and finally the compression sleeve 14 is fixed by the fastening screws 15. The fuel nozzle 1 is fixed by squeezing it with the compression sleeve 14, thereby achieving the purpose of quick disassembly and assembly.

[0032] Preferably, a fuel pipe interface 16 communicating with the fuel inlet of the fuel nozzle 1 is provided on the compression sleeve 14, facilitating the installation of the fuel pipe.

[0033] Preferably, the axis line of the oil passage 4 is perpendicular to the axis line of the upper premixing chamber 5. During the fuel injection process of the fuel nozzle 1, the fuel enters the upper premixing chamber 5 through the oil passage 4. Since the axis line of the oil passage 4 is perpendicular to the axis line of the upper premixing chamber 5, the fuel will impact inside the upper premixing chamber 5, causing the fuel to be dispersed, so as to facilitate subsequent premixing with air. Further, a tapered groove with a narrow upper part and a wide lower part is provided at the top of the upper premixing chamber 5 connected to the oil passage 4, which can well guide the fuel downward to the lower part of the upper premixing chamber 5.

[0034] Preferably, the axis lines of the upper premixing chamber 5, the adjustment hole 6, the flow passage 10, and the lower premixing chamber 7 coincide, enabling the fuel in the upper premixing chamber to smoothly pass through and enter the lower premixing chamber 7.

[0035] Preferably, the diameter of the oil passage 4 is smaller than the diameter of the upper premixing chamber 5. The small-diameter oil passage 4 can accelerate the fuel, thereby improving the fuel dispersion effect. The diameter of the flow passage 10 is smaller than the diameter of the upper premixing chamber 5. Similarly, the small-diameter flow passage 10 also enables the fuel to quickly enter the lower premixing chamber 7. The diameter of the upper premixing chamber 5 is smaller than the diameter of the lower premixing chamber 7, which can increase the volume of the lower premixing chamber 7 to facilitate the mixing of fuel and air.

[0036] Preferably, the adjusting column 9 is a T-shaped screw, and the adjustment hole 6 is a threaded hole. Among them, the screw rod of the T-shaped screw is threadedly connected in the threaded hole, and the flow passage 10 is provided through the center of the T-shaped screw. The structure of the T-shaped screw cooperating with the threaded hole not only meets the requirement of quick disassembly and assembly of the adjusting column 9, but also in the actual adjustment process, the volumes of the upper premixing chamber 5 and the lower premixing chamber 7 can be adjusted by replacing T-shaped screws with different screw rod heights and nut thicknesses, thereby adjusting the pressures of the two, so as to achieve the adjustment of the dispersion effect of the upper premixing chamber 5 and the premixing effect of the lower premixing chamber 7, and the structure is more ingenious.

[0037] The above are only the preferred embodiments of the present invention. It should be noted that for those skilled in the art, without departing from the structure of the present invention, several modifications and improvements can be made, and these will not affect the implementation effect of the present invention and the practicability of the patent.

Claims

1. An adjustable air-entrained direct injection device, comprising a fuel nozzle (1), an air-entrained nozzle (2) and an adapter (3), wherein the fuel nozzle (1) and the air-entrained nozzle (2) are respectively mounted at two ends of the adapter (3), characterized in that: An oil passage (4), an upper premixing chamber (5), an adjusting hole (6) and a lower premixing chamber (7) are respectively arranged in the aptamer (3). The oil passage (4), the upper premixing chamber (5), the adjusting hole (6) and the lower premixing chamber (7) are communicated in sequence. The oil passage (4) is communicated with the fuel injection port of the fuel injector (1). The lower premixing chamber (7) is communicated with the air inlet of the air-entraining injector (2). A compressed air interface (8) communicated with the lower premixing chamber (7) is further arranged on one side of the aptamer (3). A detachable adjusting column (9) is hermetically installed in the adjusting hole (6). A flow passage (10) communicating the upper premixing chamber (5) and the lower premixing chamber (7) is arranged in the adjusting column (9). Fuel injector mounting holes (11) and air-entraining injector mounting holes (12) are respectively arranged at both ends of the aptamer (3). The fuel injector (1) is detachably installed in the fuel injector mounting hole (11). The air-entraining injector (2) is detachably installed in the air-entraining injector mounting hole (12). The adjusting column (9) is a T-shaped screw, and the adjusting hole (6) is a threaded hole. The screw of the T-shaped screw is threadedly connected in the threaded hole. The flow passage (10) is arranged through the center of the T-shaped screw.

2. The adjustable air clamping direct injection spraying device according to claim 1, wherein, Sealing rings (13) are arranged between the two ends of the fuel injector (1) and the inner wall of the fuel injector mounting hole (11), and between the air-entraining injector (2) and the inner wall of the air-entraining injector mounting hole (12).

3. An adjustable air clamping direct injection spraying device according to claim 1, characterized in that, One end of the air-entraining injector (2) is slidably inserted into the air-entraining injector mounting hole (12). A connecting flange (17) is arranged on the periphery of the aptamer (3). The connecting flange (17) is connected with the engine cylinder head by bolts.

4. An adjustable air-clamping direct injection spraying device according to claim 1, characterized in that, The fuel injector (1) is slidably inserted into the fuel injector mounting hole (11). A compression sleeve (14) for pressing the fuel injector (1) is arranged on the aptamer (3) outside the fuel injector mounting hole (11). The compression sleeve (14) is connected with the aptamer (3) by fastening screws (15).

5. An adjustable air clamping direct injection spraying device according to claim 4, characterized in that, A fuel pipe interface (16) communicated with the fuel inlet of the fuel injector (1) is arranged on the compression sleeve (14).

6. An adjustable air clamping direct injection spraying device according to any one of claims 1-5, characterized in that, The axis line of the oil passage (4) is perpendicular to the axis line of the upper premixing chamber (5).

7. An adjustable air clamping direct injection spraying device according to claim 6, characterized in that, The axis lines of the upper premixing chamber (5), the adjusting hole (6), the flow passage (10) and the lower premixing chamber (7) coincide.

8. An adjustable air clamping direct injection spraying device according to claim 6, characterized in that, The diameter of the oil passage (4) is smaller than the diameter of the upper premixing chamber (5). The diameter of the flow passage (10) is smaller than the diameter of the upper premixing chamber (5). The diameter of the upper premixing chamber (5) is smaller than the diameter of the lower premixing chamber (7).

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