Air-entrapped injection assembly and engine

Abstract

The utility model provides an entrained gas injection component, including outer shell, pressure regulating valve, fuel injector and entrained gas injector, outer shell includes pressure regulating valve mounting cavity, fuel injector mounting cavity and oil-gas mixing cavity, pressure regulating valve mounting cavity is communicated with fuel injector mounting cavity, fuel injector mounting cavity is communicated with oil-gas mixing cavity, and fuel injector mounting cavity is communicated with oil-gas mixing cavity. The pressure regulating valve is arranged in the pressure regulating valve installation cavity, the fuel injector is arranged in the fuel injector installation cavity, the fuel injector, the pressure regulating valve and the air-entraining injector are integrated in the same shell, the overall size and weight are reduced, and the requirement for light weight of an aero-engine is met. An oil inlet, an oil return port and an air inlet are formed in the lower shell, the air inlet is communicated with the pressure regulating valve mounting cavity through an auxiliary air channel, the pressure difference between fuel oil and compressed air can be stabilized under the action of the pressure regulating valve, and continuity and stability of oil spraying atomization are guaranteed. And the fuel oil is mixed and atomized through the compressed gas, so that the atomization effect of the fuel oil is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of engines, in particular to an air entrainment injection component. Background Art

[0002] Currently, aviation engines are primarily gasoline-powered. Gasoline as a fuel carries certain risks during storage and transportation, while heavy fuel oil offers significant advantages in fuel safety and fuel supply convenience, making aviation heavy fuel oil engines a key future development trend. However, aviation heavy fuel oil has high viscosity, making atomization difficult, and its low octane number leads to a significant tendency to knock during combustion, which can easily limit the engine's power output. This is where entrained air injection technology comes in handy, injecting an oil-air mixture—a mixture of heavy fuel oil and compressed air—into the engine's combustion chamber. Entrained air injection enables the oil-air mixture injected into the combustion chamber to have small oil particle diameters, low oil beam density, low oil beam penetration, and a gradient concentration distribution. However, existing entrained air injector assemblies utilizing this technology are excessively large and heavy, with complex structures, making them difficult to apply to aircraft engines.

[0003] Therefore, it is necessary to provide an air entrainment injection assembly to overcome the above-mentioned defects. Utility Model Content

[0004] The purpose of the utility model is to provide an air entrainment injection component and an engine.

[0005] According to one aspect of the present invention, there is provided an air entrainment injection assembly, comprising:

[0006] An outer shell, the outer shell including a pressure regulating valve mounting chamber, a fuel injector mounting chamber, and an oil-gas mixing chamber, the pressure regulating valve mounting chamber being in communication with the fuel injector mounting chamber, and the fuel injector mounting chamber being in communication with the oil-gas mixing chamber;

[0007] A pressure regulating valve, wherein the pressure regulating valve is arranged in a pressure regulating valve installation cavity;

[0008] a fuel injector, the fuel injector being disposed in the fuel injector mounting cavity;

[0009] an air-entrained injector connected to the outer shell and disposed at the outlet end of the oil-gas mixing chamber;

[0010] The outer shell is provided with an oil inlet, an oil return port and an air inlet. The oil inlet is connected to the upper part of the pressure regulating valve installation cavity. The air inlet is connected to the oil-gas mixing cavity through the main air channel and is connected to the bottom of the pressure regulating valve installation cavity through the secondary air channel.

[0011] Preferably, the air entrainment injector is arranged perpendicular to the fuel injector.

[0012] Preferably, the oil return port is located above the oil inlet, and the air inlet is located below the oil inlet, and is arranged on the same side of the pressure regulating valve installation cavity as the oil inlet.

[0013] Preferably, the upper portion of the pressure regulating valve installation cavity is communicated with the upper portion of the fuel injector installation cavity through a built-in oil passage, and the bottom of the fuel injector installation cavity is communicated with the oil-gas mixing cavity.

[0014] Preferably, the bottom of the pressure regulating valve installation cavity is connected to the main air channel through the secondary air channel.

[0015] Preferably, the main air channel is arranged in parallel with the built-in oil channel, the main air channel is located below the pressure regulating valve installation cavity, and the axis of the main air channel is located above the center of the oil-gas mixing cavity.

[0016] Preferably, a blocking member is provided in the oil-gas mixing chamber, and the blocking member includes a fixed plate fixed to the end wall of the oil-gas mixing chamber and a surrounding plate bent from the edge of the fixed plate to the side where the air injector is located. The blocking member is provided with an opening on the side opposite to the fixed plate to form an exhaust port, and an inlet is provided on the surrounding plate. The exhaust port is connected to the inlet port, and the outlet of the main air duct and the outlet of the fuel injector installation chamber are both facing the inlet port.

[0017] Preferably, the enclosure plate is in a frustum shape and is gradually gathered from the side where the fixed plate is located to the side where the air-entraining ejector is located.

[0018] Preferably, the outer shell includes an upper shell and a lower shell, the pressure regulating valve installation cavity and the fuel injector installation cavity are both arranged between the upper shell and the lower shell, and the oil-gas mixing chamber is arranged in the lower shell.

[0019] According to another aspect of the present invention, an engine is provided, comprising the above-mentioned entrained air injection assembly.

[0020] Compared with the prior art, the air entrainment injection assembly and engine provided by the present invention have the following beneficial effects:

[0021] Due to the adoption of the above-mentioned technical solution, the present invention has the advantages of simple structure, ingenious design, and low cost. By integrating the fuel injector, pressure regulating valve, and air-entrained injector into the same housing, the overall volume and weight are reduced, meeting the requirements for lightweight aircraft engines. The lower housing is provided with an oil inlet, an oil return port, and an air inlet. The air inlet is connected to the pressure regulating valve mounting cavity via a secondary air duct. Under the action of the pressure regulating valve, the pressure difference between the fuel and compressed air is stabilized, ensuring the continuity and stability of the fuel spray atomization. The compressed gas is used to assist in the mixed atomization of the fuel, improving the fuel atomization effect. It is suitable for direct injection of a variety of fuels into the cylinder, improving the power and economy of the engine. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments:

[0023] Figure 1 A perspective view of the air entrainment injection assembly of the present invention;

[0024] Figure 2 This is an exploded view of the air entrainment injection assembly of the present invention;

[0025] Figure 3 It is a top view of the air entrainment injection assembly of the present invention;

[0026] Figure 4 for Figure 3 The cross-sectional view of the AA surface;

[0027] Figure 5 for Figure 3 Cross-sectional view of the BB surface;

[0028] Figure 6 for Figure 4 Cross-section view without pressure regulating valve and fuel injector;

[0029] Figure 7 It is a top view of the air entrainment injection assembly of the present invention;

[0030] Figure 8 for Figure 7 Cross-sectional view of CC surface;

[0031] Figure 9 It is a three-dimensional diagram of the blocking member of the present invention.

[0032] Among them, 1. Outer shell, 11 upper shell, 111. Oil inlet, 112. Oil return port, 113. Built-in oil channel, 12. Lower shell, 121. Air inlet, 122. Main air channel, 123. Auxiliary air channel, 124. Bolt bracket, 13. Oil-gas mixing chamber, 14. Pressure regulating valve installation chamber, 15. Fuel injector installation chamber, 2. Pressure regulating valve, 3. Fuel injector, 4. Air-clamping injector, 5. Blocking part, 51. Fixing plate, 52. Enclosure, 53. Exhaust port, 54. Inlet, 6. Screw. DETAILED DESCRIPTION

[0033] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0034] To simplify the drawings, only the parts relevant to the present invention are schematically shown in each figure. They do not represent the actual structure of the product. In addition, to simplify the drawings and facilitate understanding, in some figures, only one of the components with the same structure or function is schematically depicted or labeled. In this document, "one" not only means "only one" but also "more than one."

[0035] It should be further understood that the term "and / or" used in this specification and the appended claims refers to and includes any and all possible combinations of one or more of the associated listed items.

[0036] It should be noted that, unless otherwise specified or limited, the terms "mounted," "connected," and "connected" should be understood broadly. For example, they can refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediary; and internal communication between two components. Those skilled in the art will understand the specific meanings of these terms in this utility model based on the specific circumstances.

[0037] In addition, in the description of the present application, the terms "first", "second", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0038] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the specific implementation methods of the present invention will be described below with reference to the accompanying drawings. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings and other implementation methods can be obtained based on these drawings without inventive work.

[0039] See also Figure 1 、 Figure 4 and Figure 6 This embodiment discloses an air-entrained injection assembly, which is mounted on the cylinder block of an engine and includes an outer shell 1, a pressure regulating valve 2, a fuel injector 3, and an air-entrained injector 4. The pressure regulating valve 2 and the fuel injector 3 are both arranged in the outer shell 1. The outer shell 1 includes an upper shell 11 and a lower shell 12, and the upper shell 11 and the lower shell 12 are detachably connected by screws 6. An oil-gas mixing chamber 13 is provided in the lower shell 12, and a pressure regulating valve installation chamber 14 and a fuel injector installation chamber 15 are provided between the upper shell 11 and the lower shell 12. A bolt bracket 124 connected to the engine cylinder block is provided on the lower shell 12, which adopts three-point evenly distributed support to provide better fixation stability.

[0040] See also Figure 2 、 Figure 3 and Figure 4 The pressure regulating valve mounting cavity 14 communicates with the fuel injector mounting cavity 15, which in turn communicates with the oil-gas mixing cavity 13. An air-entraining injector 4 is located at the outlet of the fuel injector mounting cavity 15. Therefore, during installation, the upper and lower housings are separated, the pressure regulating valve 2 is installed into the pressure regulating valve mounting cavity 14, and the fuel injector 3 is installed into the fuel injector mounting cavity 15. The upper and lower housings 11 and 12 are then assembled using screws 6. At this point, the air-entraining injector 4 is positioned perpendicular to the fuel injector 3, reducing the volume of the air-entraining injector assembly and effectively reducing the overall width or height of the machine.

[0041] In addition, the upper housing 11 is provided with an oil inlet 111 and an oil return port 112, and the lower housing 12 is provided with an air inlet 121. The oil inlet 111, oil return port 112, and air inlet 121 are all connected to the pressure regulating valve mounting chamber 14. The oil return port 112 is located at the top of the pressure regulating valve mounting chamber 14, while the oil inlet 111 and air inlet 121 are located on the same side of the pressure regulating valve mounting chamber 14. The oil inlet 111 is connected to the upper portion of the pressure regulating valve mounting chamber 14. The upper portion of the pressure regulating valve mounting chamber 14 is connected to the upper portion of the fuel injector mounting chamber 15 via a built-in oil passage 113. The bottom of the fuel injector mounting chamber 15 is provided with an opening that connects to the oil-gas mixing chamber 13.

[0042] The air inlet 121 is connected to the oil-gas mixing chamber 13 through the main air channel 122. The main air channel 122 is arranged parallel to the built-in oil channel 113 and is located below the pressure regulating valve installation chamber 14. The axis of the main air channel 122 is located above the center of the oil-gas mixing chamber 13, that is, there is a certain eccentric distance between the main air channel 122 and the center of the oil-gas mixing chamber 13, which is conducive to the formation of a vortex after the compressed gas enters the oil-gas mixing chamber 13 from the side, thereby better driving the atomization and mixing of the fuel. The bottom of the pressure regulating valve installation chamber 14 is connected to the main air channel 122 through the secondary air channel 123. The pressure regulating valve 2 is installed in the pressure regulating valve installation chamber 14, its bottom is connected to the secondary air channel 123, and its top is connected to the oil return port 112.

[0043] See also Figure 5 The fuel injector 3 is vertically mounted in the fuel injector mounting chamber 15 , and its top inlet is communicated with the built-in oil passage 113 . The bottom outlet of the fuel injector 3 is communicated with the oil-gas mixing chamber 13 .

[0044] See also Figure 7 、 Figure 8 and Figure 9A blocking member 5 is provided in the oil-gas mixing chamber 13. The blocking member 5 includes a fixed plate 51 fixed to the end wall of the oil-gas mixing chamber 13 and a surrounding plate 52 bent from the edge of the fixed plate 51 to the side where the air-entraining injector 4 is located. The blocking member 5 is provided with an opening on the side opposite to the fixed plate 51 to form an exhaust port 53. An inlet 54 is provided on the surrounding plate 52. The exhaust port 53 is connected to the inlet port 54. The outlet of the main air channel 122 and the outlet of the fuel injector mounting chamber 15 are both facing the inlet port 54. Furthermore, the surrounding plate 52 is in the shape of a truncated cone, which is gradually converged from the side where the fixed plate 51 is located to the side where the air-entraining injector 4 is located. The setting of the blocking member 5 can, on the one hand, gather the fuel sprayed by the fuel injector 3 to the top of the air-entraining injector 4, and on the other hand, prevent the mist fuel sprayed by the fuel injector 3 from directly hitting the wall surface of the oil-gas mixing chamber 13, thereby avoiding cavitation of the wall surface caused by long-term operation.

[0045] Fuel enters the upper portion of the pressure-regulating valve mounting chamber 14 through the fuel inlet, while compressed air enters the lower portion of the pressure-regulating valve mounting chamber 14 through the air inlet 121 and the auxiliary air passage 123. The pressure-regulating valve 2 determines the differential between the oil and air pressures based on a preset differential pressure. When the fuel pressure is too high, the drain channel in the pressure-regulating valve 2, connected to the oil return port 112, opens, allowing some fuel to flow back into the fuel tank through the oil return port 112, reducing the pressure in the upper portion of the pressure-regulating valve mounting chamber 14 and ensuring that the differential between the oil and air pressures remains constant at the set value.

[0046] When the difference between oil and air pressure stabilizes, fuel enters fuel injector 3 and, according to ECU instructions, sprays fuel into oil-air mixing chamber 13. Simultaneously, compressed air enters oil-air mixing chamber 13 through main air passage 122, assisting in fuel atomization and improving atomization. Air-entrained injector 4, according to ECU instructions, sprays the oil-air mixture in oil-air mixing chamber 13 into the cylinder in an umbrella-shaped pattern. The spark plug ignites according to ECU instructions, and the fuel in the engine cylinder burns and produces work.

[0047] This embodiment also discloses an engine, including the above-mentioned air entrainment injection assembly.

[0048] It will be apparent to those skilled in the art that various modifications and variations can be made to the exemplary embodiments described above without departing from the spirit and scope of the present invention. Therefore, it is intended that the present invention cover modifications and variations of the present invention that fall within the scope of the appended claims and their equivalents.

Claims

1. An air entrainment injection assembly, characterized in that: include: An outer shell, the outer shell including a pressure regulating valve mounting chamber, a fuel injector mounting chamber, and an oil-gas mixing chamber, the pressure regulating valve mounting chamber being in communication with the fuel injector mounting chamber, and the fuel injector mounting chamber being in communication with the oil-gas mixing chamber; A pressure regulating valve, wherein the pressure regulating valve is arranged in a pressure regulating valve installation cavity; a fuel injector, the fuel injector being disposed in the fuel injector mounting cavity; an air-entrained injector connected to the outer shell and disposed at the outlet end of the oil-gas mixing chamber; The outer shell is provided with an oil inlet, an oil return port and an air inlet. The oil inlet is connected to the upper part of the pressure regulating valve installation cavity. The air inlet is connected to the oil-gas mixing cavity through the main air channel and is connected to the bottom of the pressure regulating valve installation cavity through the secondary air channel.

2. The air entrainment injection assembly according to claim 1, wherein: The air entrainment injector is arranged perpendicular to the fuel injector.

3. The air entrainment injection assembly according to claim 1, wherein: The oil return port is located above the oil inlet, and the air inlet is located below the oil inlet, and is arranged on the same side of the pressure regulating valve installation cavity as the oil inlet.

4. The air entrainment injection assembly according to claim 3, wherein: The upper portion of the pressure regulating valve installation cavity is communicated with the upper portion of the fuel injector installation cavity through a built-in oil passage, and the bottom of the fuel injector installation cavity is communicated with the oil-gas mixing cavity.

5. The air entrainment injection assembly according to claim 4, wherein: The bottom of the pressure regulating valve installation cavity is communicated with the main air channel through the secondary air channel.

6. The air entrainment injection assembly according to claim 5, wherein: The main air channel is arranged in parallel with the built-in oil channel. The main air channel is located below the pressure regulating valve installation cavity, and the axis of the main air channel is located above the center of the oil-gas mixing cavity.

7. The air entrainment injection assembly according to claim 6, wherein: A blocking member is provided in the oil-gas mixing chamber, and the blocking member includes a fixed plate fixed to the end wall of the oil-gas mixing chamber and a surrounding plate bent from the edge of the fixed plate to the side where the air injector is located. The blocking member is provided with an opening on the side opposite to the fixed plate to form an exhaust port. An inlet is provided on the surrounding plate, and the exhaust port is connected to the inlet port. The outlet of the main air duct and the outlet of the fuel injector installation chamber are both facing the inlet port.

8. The air entrainment injection assembly according to claim 7, wherein: The enclosure plate is in a frustum shape and is gradually gathered from the side where the fixed plate is located to the side where the air-entraining ejector is located.

9. The air entrainment injection assembly according to claim 8, wherein: The outer shell includes an upper shell and a lower shell. The pressure regulating valve installation cavity and the fuel injector installation cavity are both arranged between the upper shell and the lower shell. The oil-gas mixing cavity is arranged in the lower shell.

10. An engine, characterized in that: The invention comprises the air entrainment injection assembly according to any one of claims 1 to 9.

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