Gas fuel injector

Abstract

The invention belongs to the technical field of injectors, and particularly relates to a gas fuel injector which comprises a thrust block, an interval groove is formed in the outer arc face of the thrust block, a main shaft sealing ring is connected in the interval groove in the outer arc face of the thrust block in a sleeved mode, a containing cavity is formed in the middle of the inner arc face of the thrust block, and an adjusting bolt is in threaded connection with the top of the inner arc face of the thrust block. The outer arc face of the adjusting bolt is in threaded connection with a nut, air through channels are formed in the two sides of the inner arc face of the thrust block, the inner arc face of the containing cavity is sleeved with a spring, and one end of the spring abuts against the bottom face of the adjusting bolt. The gas fuel injector can automatically adjust the fuel injection flow according to different working conditions of the engine, the channel caliber is increased to increase the oil supply amount in high load, the caliber is reduced to avoid waste in low load, it is ensured that the engine can obtain optimal fuel supply under various working conditions, and the power output stability is improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of injectors, and more specifically, it is a gas fuel injector. Background Art

[0002] With the gradual depletion of oil resources, it has become an inevitable trend to search for alternative energy sources. Gas fuels such as natural gas, liquefied petroleum gas, coal gas, hydrogen, etc. are increasingly widely used in engines due to their abundant reserves and relatively clean characteristics. As a clean energy gas fuel, it has good application prospects in the fields of vehicle and marine engines, can effectively reduce carbon emissions, and meet environmental protection requirements. The gas supply method of gas fuel engines has evolved from intake port injection to direct injection into the cylinder. The intake port injection method has disadvantages such as low charging efficiency and a decrease in engine power. The direct injection into the cylinder technology, on the other hand, has obvious advantages such as high thermal efficiency, fast response, and low emissions, which can improve the charging efficiency of the engine, but has more stringent requirements for the sealing performance and heat resistance of the injector.

[0003] Patent CN114483383B discloses a gas fuel injector, which has the following defects: its fixed injection aperture is difficult to adapt to the complex and variable working conditions of the engine. Under high-load and low-speed working conditions, the too-large aperture will lead to too-high gas concentration at the bottom of the combustion chamber, uneven fuel distribution, and a significant decrease in the fuel economy of the engine; while under low-load and high-speed working conditions, the too-small aperture will cause the gas in the combustion chamber to be too lean, poor mixing effect of fuel and air, and seriously weaken the power performance of the engine.

[0004] Therefore, the present invention provides a gas fuel injector. Summary of the Invention

[0005] To make up for the deficiencies of the prior art and solve at least one of the technical problems proposed in the background art.

[0006] The technical solution adopted by the present invention to solve its technical problems is as follows: A gas fuel injector according to the present invention includes a thrust block. A groove is provided on the outer arc surface of the thrust block. A main shaft seal ring is sleeved in the groove on the outer arc surface of the thrust block. A receiving cavity is provided in the middle of the inner arc surface of the thrust block. An adjusting bolt is threadedly connected to the top of the inner arc surface of the thrust block. A nut is threadedly connected to the outer arc surface of the adjusting bolt. Air passage channels are provided on both sides of the inner arc surface of the thrust block. A spring is sleeved on the inner arc surface of the receiving cavity. One end of the spring abuts against the bottom surface of the adjusting bolt. A diameter kit is sleeved on the outer arc surface of the spring. A conical surface is provided at the bottom of the outer arc surface of the diameter kit. A space groove is provided on the outer arc surface of the diameter kit. Elastic parts are provided at the joints of the space grooves on the outer arc surface of the diameter kit. One side of the elastic part is adapted to the inner wall of the receiving cavity. A through groove is provided in the middle of the inner arc surface of the diameter kit. The through groove on the inner arc surface of the diameter kit is connected to the spring. The end of the spring away from the adjusting bolt abuts against a main shaft valve needle. A pressure-sensitive air combination component is attached to the lower surface of the main shaft valve needle.

[0007] A pressure chamber is provided at the bottom of the inner arc surface of the thrust block near the receiving cavity. The pressure-sensitive air combination component includes a sealing ring sleeved on the inner arc surface of the pressure chamber. A pin column is connected to the inner arc surface of the sealing ring.

[0008] A concave cavity is provided on the lower surface of the pin column. A shaft ring cone abuts against the lower surface of the pin column. A conical end is provided on the upper surface of the shaft ring cone. The shaft ring cone penetrates through and is connected to the inside of the concave cavity through the conical end at the top. A concave arc surface A is provided in the middle of the lower surface of the shaft ring cone.

[0009] The shaft ring cone is movably abutted against a sphere through the concave arc surface A at the bottom surface. The outer arc surface of the sphere is placed on one side of the air passage channel. A column pin shaft is movably connected to the bottom of the outer arc surface of the sphere.

[0010] A concave arc surface B is provided on the upper surface of the column pin shaft. The concave arc surface B and the concave arc surface A respectively abut against the top and bottom of the outer arc surface of the sphere. A concave opening end is provided on the upper surface of the column pin shaft near the sphere. The upper surface of the concave opening end is adapted to the sphere.

[0011] An injection oil screw sleeve is sleeved on the bottom of the outer arc surface of the thrust block. An atomization section is threadedly connected to the inner arc surface of the injection oil screw sleeve. The atomization section is placed on the periphery of the pin column. A convex rib edge is provided on the outer arc surface of the atomization section.

[0012] The lower surface of the injection oil screw sleeve is placed on the end surface of the convex rib edge. A gap is provided between the injection oil screw sleeve and the convex rib edge. A sealing component is movably clamped in the gap.

[0013] The sealing assembly includes an elastic shrinkage ring disposed in the gap between the fuel injection sleeve and the convex rib edge. A corrugated section is provided in the middle of the inner arc surface of the elastic shrinkage ring, and a nozzle tip is fixedly connected to the lower surface of the elastic shrinkage ring.

[0014] A spherical groove is provided on the inner arc surface of the nozzle tip. The lower surface of the nozzle tip is an open end. A ball valve is sleeved on the inner arc surface of the nozzle tip, and the outer arc surface of the ball valve abuts against the spherical groove.

[0015] The outer arc surface of the ball valve is in the same plane as the pressure chamber. The nozzle tip is placed on the bottom surface of the atomization section, and the ball valve is fixedly connected to the pin.

[0016] The beneficial effects of the present invention are as follows:

[0017] 1. Through the pressure-responsive deformation mechanism of the elastic part of the caliber kit and the conduction and conversion of pressure by the pressure-sensitive pneumatic combination component, the gas fuel injector can automatically adjust the fuel injection flow according to different working conditions of the engine. When the load is high, the channel caliber is increased to increase the fuel supply. When the load is low, the caliber is reduced to avoid waste, ensuring that the engine can obtain the optimal fuel supply under various working conditions and improving the stability of power output.

[0018] 2. Through the coordinated operation of components such as the sphere, column pin shaft, and pin in the pressure-sensitive pneumatic combination component, the rapid conduction and amplification of gas pressure are achieved, and the opening and closing timing of the main shaft valve needle and the ball valve are controlled. When the pressure reaches the threshold value, the injection channel is quickly opened, enabling the fuel to be sprayed into the combustion chamber in a timely and efficient manner, promoting the full mixing of fuel and air, improving the combustion efficiency, and further enhancing the power performance of the engine and reducing the power delay phenomenon.

[0019] 3. Through the cooperation of the elastic shrinkage ring, corrugated section in the sealing assembly, and the ball valve and the nozzle tip, a multiple sealing structure is constructed. The elastic component deforms adaptively according to the pressure change, closely fitting the component gap to prevent fuel leakage. The ball valve controls the opening and closing of the injection channel to avoid fuel leakage. This effectively avoids the safety hazards caused by fuel leakage, while preventing the erosion of internal components by fuel, reducing the failure rate, extending the overall service life of the injector and the engine, and reducing the maintenance cost and frequency. Description of the Drawings

[0020] The present invention will be further described below with reference to the drawings.

[0021] Figure 1 is a three-dimensional view of the injector of the present invention;

[0022] Figure 2 is a sectional internal structure view of the injector of the present invention;

[0023] Figure 3 is a structural schematic diagram of the caliber kit in the present invention;

[0024] Figure 4 is a schematic diagram of the internal structure disassembly of the thrust block in the present invention;

[0025] Figure 5 is a schematic diagram of the flat-section inner wall structure of the pressure-sensitive pneumatic combination component in the present invention;

[0026] Figure 6 is a schematic diagram of the sectional three-dimensional structure of the pressure-sensitive pneumatic combination component in the present invention;

[0027] Figure 7 is a schematic diagram of the disassembly structure of the sealing component in the present invention;

[0028] Figure 8 is a schematic diagram of the flat-section internal structure of the thrust block in the present invention;

[0029] Figure 9 is the present invention Figure 5 a magnified structural schematic diagram of location A.

[0030] In the figure: 1. Thrust block; 101. Main shaft sealing ring; 102. Accommodating cavity; 103. Air passage; 104. Oil injection screw sleeve; 105. Atomization section; 106. Convex rib edge; 107. Pressure chamber;

[0031] 2. Adjusting bolt; 3. Nut; 4. Spring;

[0032] 5. Bore kit; 501. Conical surface; 502. Space groove; 503. Elastic part; 6. Main shaft valve needle;

[0033] 7. Pressure-sensitive pneumatic combination component; 71. Sealing ring; 72. Pin; 721. Concave cavity; 73. Shaft ring cone; 731. Concave arc surface A; 74. Sphere; 75. Column pin shaft; 751. Concave arc surface B; 752. Depressed opening end;

[0034] 8. Sealing component; 81. Elastic shrinkage ring; 811. Corrugated section; 82. Nozzle tip; 821. Spherical groove; 83. Ball valve. Detailed implementation manners

[0035] In order to make the technical means, creative features, achieved purposes and functions of the present invention easy to understand, the present invention will be further described below in conjunction with specific implementation manners.

[0036] Such as Figure 1 、 Figure 2 、 Figure 3 and Figure 4As shown in the figure, the embodiment of the present invention includes a thrust block 1. A spaced groove is provided on the outer arc surface of the thrust block 1. A main shaft seal ring 101 is sleeved in the spaced groove on the outer arc surface of the thrust block 1. A receiving cavity 102 is provided in the middle of the inner arc surface of the thrust block 1. An adjusting bolt 2 is threadedly connected to the top of the inner arc surface of the thrust block 1. A nut 3 is threadedly connected to the outer arc surface of the adjusting bolt 2. Air passage channels 103 are provided on both sides of the inner arc surface of the thrust block 1. A spring 4 is sleeved on the inner arc surface of the receiving cavity 102. One end of the spring 4 abuts against the bottom surface of the adjusting bolt 2. A diameter kit 5 is sleeved on the outer arc surface of the spring 4. A conical surface 501 is provided at the bottom of the outer arc surface of the diameter kit 5. A space groove 502 is formed on the outer arc surface of the diameter kit 5. Elastic parts 503 are provided at the joints of the space grooves 502 on the outer arc surface of the diameter kit 5 in pairs. One side of the elastic part 503 is adapted to the inner wall of the receiving cavity 102. A through groove is formed in the middle of the inner arc surface of the diameter kit 5. The through groove on the inner arc surface of the diameter kit 5 is connected to the spring 4. The end of the spring 4 away from the adjusting bolt 2 abuts against a main shaft valve needle 6. The lower surface of the main shaft valve needle 6 is attached with a pressure-sensitive air combination component 7.

[0037] The main shaft seal ring 101 is tightly sleeved in the spaced groove on the outer arc surface of the thrust block 1 to play a sealing role and prevent external impurities or gases from invading. In the receiving cavity 102 in the middle of the inner arc surface of the thrust block 1, first place the spring 4, and then thread the adjusting bolt 2 to the top of the inner arc surface of the thrust block 1 so that one end of the spring 4 abuts against the bottom surface of the adjusting bolt 2. Then screw the nut 3 onto the outer arc surface of the adjusting bolt 2. Through the cooperation of the nut 3 and the adjusting bolt 2, the pre-tightening force of the spring 4 can be adjusted to adapt to different working requirements.

[0038] The diameter kit 5 is sleeved on the outer arc surface of the spring 4 to ensure that the conical surface 501 at the bottom of the outer arc surface of the diameter kit 5 faces the correct direction. The elastic parts 503 at the joints of the space grooves 502 on the outer arc surface of the diameter kit 5 in pairs are tightly adapted to the inner wall of the receiving cavity 102. During the working process, the elastic parts 503 can undergo elastic deformation to realize the adjustment of the injection diameter. The through groove in the middle of the inner arc surface of the diameter kit 5 is connected to the spring 4. The end of the spring 4 away from the adjusting bolt 2 abuts against the main shaft valve needle 6.

[0039] When the gaseous fuel enters the injector through the air passage channels 103 on both sides of the inner arc surface of the thrust block 1, the pressure acts on the pressure-sensitive air combination component 7, prompting the main shaft valve needle 6 to move upward against the elastic force of the spring 4, and then opening the channel formed by the conical surface 501 at the bottom of the outer arc surface of the diameter kit 5 and the surrounding components, so that the fuel can flow in.

[0040] During the operation of the engine, changes in the working conditions can cause the gas pressure to change. When the engine is in a high-load working condition, the gas pressure increases significantly. The elastic part 503 on the outer arc surface of the diameter kit 5 expands outward under the action of the pressure. Since the elastic part 503 is adapted to the inner wall of the accommodation cavity 102, its outward expansion increases the channel diameter formed by the diameter kit 5 and the surrounding components, thereby increasing the injection flow rate of the gas fuel to meet the fuel demand during the high-load operation of the engine.

[0041] Conversely, when the engine is in a low-load working condition, the gas pressure decreases, and the elastic force of the spring 4 plays a dominant role. The spring 4 pushes the main shaft valve needle 6 downward, and at the same time promotes the elastic part 503 to contract inward. The inward contraction of the elastic part 503 reduces the channel diameter and the injection flow rate of the gas fuel, avoiding fuel waste and ensuring the stable operation of the engine under low-load conditions.

[0042] In addition, the through groove in the middle of the inner arc surface of the diameter kit 5 is connected to the spring 4, and a space groove 502 is provided on its outer arc surface. The elastic part 503 at the connection of the space grooves 502 has good elasticity and deformation recovery ability, ensuring that the elastic part 503 can deform flexibly when the pressure changes, and maintaining the stability of the overall structure of the diameter kit 5, enabling it to continuously and accurately adjust the fuel injection flow rate according to the engine working conditions during long-term operation.

[0043] As Figure 5 、 Figure 6 、 Figure 8 and Figure 9 shown, a pressure chamber 107 is provided on the inner arc surface of the thrust block 1 near the bottom of the accommodation cavity 102. The pressure-sensitive gas combination component 7 includes a sealing ring 71 sleeved on the inner arc surface of the pressure chamber 107. A pin 72 is connected to the inner arc surface of the sealing ring 71. An inner concave cavity 721 is provided on the lower surface of the pin 72. A shaft ring cone 73 is abutted against the lower surface of the pin 72. A conical end is provided on the upper surface of the shaft ring cone 73. The shaft ring cone 73 penetrates through and is connected to the inside of the inner concave cavity 721 through the conical end at the top. A concave arc surface A731 is provided in the middle of the lower surface of the shaft ring cone 73. The shaft ring cone 73 is movably abutted against a sphere 74 through the concave arc surface A731 at the bottom surface. The outer arc surface of the sphere 74 is placed on one side of the gas passage 103. A column pin shaft 75 is movably connected to the bottom of the outer arc surface of the sphere 74. A concave arc surface B751 is provided on the upper surface of the column pin shaft 75. The concave arc surface B751 and the concave arc surface A731 respectively abut against the top and bottom of the outer arc surface of the sphere 74. A concave opening end 752 is provided on the upper surface of the column pin shaft 75 near the sphere 74. The upper surface of the concave opening end 752 is adapted to the sphere 74.

[0044] In the pressure chamber 107 near the bottom of the inner arc surface of the thrust block 1, the sealing collar 71 is sleeved on the inner arc surface of the pressure chamber 107 to play a sealing role. The pin 72 is connected to the inner arc surface of the sealing collar 71. Then, the conical end at the top of the collar cone 73 is penetrated and connected to the concave cavity 721 on the lower surface of the pin 72, so that the concave arc surface A731 in the middle of the lower surface of the collar cone 73 faces upward. The sphere 74 is placed on the concave arc surface A731 at the bottom surface of the collar cone 73 to correspond to one side of the gas passage 103. Then, the column pin 75 is movably connected to the bottom of the outer arc surface of the sphere 74. The concave arc surface B751 on the upper surface of the column pin 75 and the concave arc surface A731 respectively abut against the top and bottom of the outer arc surface of the sphere 74. The concave opening end 752 on the upper surface of the column pin 75 near the sphere 74 is adapted to the sphere 74, completing the assembly of the pressure-sensitive gas combination component 7.

[0045] When the gaseous fuel enters the gas passages 103 on both sides of the inner arc surface of the thrust block 1, the gas pressure first acts on the sphere 74. The sphere 74 is located between the concave arc surface A731 at the bottom surface of the collar cone 73 and the concave arc surface B751 on the upper surface of the column pin 75. Since the sphere 74 is directly connected to the gas passage 103, the gas pressure is transmitted to both the collar cone 73 and the column pin 75 through the sphere 74. The column pin 75 moves upward along the axis under the action of the pressure. Its concave opening end 752 contacts the spherical surface of the sphere 74, ensuring the effective transmission of force. When the pressure reaches the threshold value, the column pin 75 pushes the main shaft valve needle 6 to move upward against the pre-tightening force of the spring 4. At this time, through the cooperation of the concave cavity 721 of the pin 72 and the conical end at the top of the collar cone 73, the pin 72 synchronously moves upward, driving the ball valve 83 connected thereto to disengage from the spherical groove 821, opening the injection channel. The elastic part 503 of the orifice kit 5 and the pressure-sensitive gas combination component 7 form a linkage adjustment mechanism. When the gas pressure increases, the elastic part 503 expands outward, increasing the channel diameter. At the same time, the upward movement amount of the pin 72 increases, further increasing the opening degree of the ball valve 83, realizing the adaptive adjustment of the flow rate. On the contrary, when the pressure decreases, the spring 4 pushes the main shaft valve needle 6 to move downward, the elastic part 503 contracts, and the closing degree of the ball valve 83 increases, jointly reducing the injection flow rate.

[0046] As Figure 5 and Figure 7 shown, an oil injection sleeve 104 is sleeved on the bottom of the outer arc surface of the thrust block 1. The inner arc surface of the oil injection sleeve 104 is threadedly connected with an atomization section 105. The atomization section 105 is placed on the periphery of the pin 72. The outer arc surface of the atomization section 105 is provided with a convex rib 106.

[0047] The lower surface of the fuel injection sleeve 104 is placed on the end face of the convex rib edge 106. There is a gap between the fuel injection sleeve 104 and the convex rib edge 106. A sealing assembly 8 is movably clamped in the gap. The sealing assembly 8 includes an elastic shrinking ring 81 arranged in the gap between the fuel injection sleeve 104 and the convex rib edge 106. A corrugated section 811 is provided in the middle of the inner arc surface of the elastic shrinking ring 81. The lower surface of the elastic shrinking ring 81 is fixedly connected to a nozzle tip 82. A spherical groove 821 is provided on the inner arc surface of the nozzle tip 82. The lower surface of the nozzle tip 82 is an open end. A ball valve 83 is sleeved on the inner arc surface of the nozzle tip 82. The outer arc surface of the ball valve 83 abuts against the spherical groove 821. The outer arc surface of the ball valve 83 is in the same plane as the pressure chamber 107. The nozzle tip 82 is placed on the bottom surface of the atomization section 105. The ball valve 83 is connected and fixed to the pin 72.

[0048] The fuel injection sleeve 104 is sleeved on the bottom of the outer arc surface of the thrust block 1. Then, the atomization section 105 is threadedly connected to the inner arc surface of the fuel injection sleeve 104, so that the atomization section 105 is placed on the periphery of the pin 72. The convex rib edge 106 on the outer arc surface of the atomization section 105 is used for cooperation with other components. In the gap between the fuel injection sleeve 104 and the convex rib edge 106, the sealing assembly 8 is installed. The elastic shrinking ring 81 is placed in the gap, so that the corrugated section 811 in the middle of the inner arc surface of the elastic shrinking ring 81 is in a proper position. Then, the nozzle tip 82 is fixedly connected to the lower surface of the elastic shrinking ring 81. The ball valve 83 is placed in the spherical groove 821 on the inner arc surface of the nozzle tip 82, so that the outer arc surface of the ball valve 83 abuts against the spherical groove 821, and the outer arc surface of the ball valve 83 is in the same plane as the pressure chamber 107. The nozzle tip 82 is placed on the bottom surface of the atomization section 105. The ball valve 83 is connected and fixed to the pin 72.

[0049] The sealing assembly 8 is composed of an elastic shrinking ring 81, a corrugated section 811 and a nozzle tip 82. It is based on elastic deformation and pressure adaptation, aiming to prevent gas fuel leakage and ensure the stable operation of the injector.

[0050] When gas fuel enters the injector, the internal pressure begins to rise. The pressure acts on the sealing assembly 8. The elastic shrinking ring 81 is installed in the gap between the fuel injection sleeve 104 and the convex rib edge 106. Under the action of gas pressure, the elastic shrinking ring 81 will undergo elastic deformation. Among them, the corrugated section 811 in the middle of the inner arc surface of the elastic shrinking ring 81 has good flexibility and deformability. Under the action of pressure, the corrugated section 811 will be further compressed, so that the elastic shrinking ring 81 closely fits the surfaces of the fuel injection sleeve 104 and the convex rib edge 106, filling the gap, thereby effectively preventing gas fuel from leaking from this gap.

[0051] As the engine operating conditions change, the gas pressure will also change accordingly. Under high-load operating conditions, the gas pressure increases, and the pressure on the elastic shrinkage ring 81 also increases, further enhancing its degree of fit with the fuel injection sleeve 104 and the rib edge 106, strengthening the sealing effect, and ensuring that fuel does not leak under high pressure. When in low-load operating conditions, although the gas pressure decreases, the elasticity of the elastic shrinkage ring 81 itself will keep it at a certain degree of fit, still maintaining a reliable sealing state.

[0052] In addition, the precise fit between the nozzle tip 82 and the ball valve 83 also provides additional guarantee for sealing. The outer arc surface of the ball valve 83 abuts against the spherical groove 821 on the inner arc surface of the nozzle tip 82. When the injector is not working or in a low-pressure state, the ball valve 83 tightly blocks the injection channel to prevent fuel leakage. When the injection pressure is reached, the ball valve 83 opens. After the fuel injection is completed, it can quickly reset and form a seal again, ensuring the accuracy and sealing of fuel injection. Through the coordinated work of the elastic shrinkage ring 81, the corrugated section 811, and the ball valve 83 and the nozzle tip 82, the sealing component 8 can effectively ensure the sealing of the injector under different operating conditions, improving the overall performance and reliability of the injector.

[0053] Specific working steps:

[0054] When the gaseous fuel enters the gas passage 103 on both sides of the inner arc surface of the thrust block 1, the gas pressure acts on the pressure-sensing gas combination component 7. Specifically, the gas pressure is transmitted to the column pin shaft 75 through the sphere 74. The column pin shaft 75 undergoes a certain displacement according to the pressure magnitude. When the pressure reaches a certain level, the column pin shaft 75 pushes the main shaft valve needle 6 to move upward against the elastic force of the spring 4, opening the channel formed by the conical surface 501 at the bottom of the outer arc surface of the caliber kit 5 and the surrounding components. The gaseous fuel enters the atomization section 105 through the cavity in the middle of the inner arc surface of the caliber kit 5.

[0055] In the atomization section 105, the gaseous fuel mixes with the surrounding air and is preliminarily atomized. As the gaseous fuel continues to flow and reaches the nozzle tip 82, since the ball valve 83 is connected to the pin 72, under the action of the gas pressure, the ball valve 83 undergoes displacement, opening the injection channel, and the atomized gaseous fuel sprays out from the open end of the nozzle tip 82.

[0056] During this process, the elastic part 503 on the outer arc surface of the caliber kit 5 can undergo elastic deformation according to the gas pressure and the action of the spring 4, changing the caliber of the channel formed with the surrounding components, thereby realizing the adjustment of the injection flow rate of the gaseous fuel to meet the requirements of different engine operating conditions. At the same time, the elastic shrinkage ring 81 and the corrugated section 811 in the sealing component 8 can ensure the sealing of the injector, preventing gaseous fuel leakage, and the cooperation between the nozzle tip 82 and the ball valve 83 further improves the stability and accuracy of injection.

[0057] The above front, back, left, right, up, and down are all based on the Figure 1 in the attached drawings of the specification. Taking the perspective of the person observing as the standard, the side of the device facing the observer is defined as the front, the left side of the observer is defined as the left, and so on.

[0058] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "lateral", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation on the protection scope of the present invention.

[0059] The above has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. What is described in the above embodiments and the specification only illustrates the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of protection claimed by the present invention is defined by the appended claims and their equivalents.

Claims

1. A gas fuel injector, characterized in that: It includes a thrust block (1). An intermediate groove is provided on the outer arc surface of the thrust block (1). A main shaft sealing ring (101) is sleeved in the intermediate groove on the outer arc surface of the thrust block (1). A receiving cavity (102) is provided in the middle of the inner arc surface of the thrust block (1). An adjusting bolt (2) is threadedly connected to the top of the inner arc surface of the thrust block (1). A nut (3) is threadedly connected to the outer arc surface of the adjusting bolt (2). Air passage channels (103) are provided on both sides of the inner arc surface of the thrust block (1). A spring (4) is sleeved on the inner arc surface of the receiving cavity (102). One end of the spring (4) abuts against the bottom surface of the adjusting bolt (2). A diameter kit (5) is sleeved on the outer arc surface of the spring (4). A conical surface (501) is provided at the bottom of the outer arc surface of the diameter kit (5). A space groove (502) is formed on the outer arc surface of the diameter kit (5). Elastic parts (503) are provided at the joints of the space grooves (502) on the outer arc surface of the diameter kit (5). One side of the elastic part (503) is adapted to the inner wall of the receiving cavity (102). A through groove is formed in the middle of the inner arc surface of the diameter kit (5). The through groove on the inner arc surface of the diameter kit (5) is connected to the spring (4). The end of the spring (4) away from the adjusting bolt (2) abuts against a main shaft valve needle (6). A pressure-sensitive air combination component (7) is attached to the lower surface of the main shaft valve needle (6).

2. The gas fuel injector according to claim 1, characterized in that: A pressure chamber (107) is provided at the bottom of the inner arc surface of the thrust block (1) near the receiving cavity (102). The pressure-sensitive air combination component (7) includes a sealing ring (71) sleeved on the inner arc surface of the pressure chamber (107). A pin column (72) is connected to the inner arc surface of the sealing ring (71).

3. The gas fuel injector according to claim 2, characterized in that: An inner concave cavity (721) is provided on the lower surface of the pin column (72). A shaft ring cone (73) abuts against the lower surface of the pin column (72). A conical end is provided on the upper surface of the shaft ring cone (73). The shaft ring cone (73) penetrates through and is connected to the inside of the inner concave cavity (721) through the conical end at the top. A concave arc surface A (731) is provided in the middle of the lower surface of the shaft ring cone (73).

4. A gas fuel injector according to claim 3, characterized in that: The shaft ring cone (73) is movably abutted against a sphere (74) through the concave arc surface A (731) on the bottom surface. The outer arc surface of the sphere (74) is placed on one side of the air passage channel (103). A column pin shaft (75) is movably connected to the bottom of the outer arc surface of the sphere (74).

5. A gas fuel injector according to claim 4, characterized in that: A concave arc surface B (751) is provided on the upper surface of the column pin shaft (75). The concave arc surface B (751) and the concave arc surface A (731) respectively abut against the top and bottom of the outer arc surface of the sphere (74). A concave opening end (752) is provided on the upper surface of the column pin shaft (75) near the sphere (74). The upper surface of the concave opening end (752) is adapted to the sphere (74).

6. The gas fuel injector according to claim 2, characterized in that: An oil injection screw sleeve (104) is sleeved on the bottom of the outer arc surface of the thrust block (1). An atomization section (105) is threadedly connected to the inner arc surface of the oil injection screw sleeve (104). The atomization section (105) is placed on the periphery of the pin column (72). A convex rib edge (106) is provided on the outer arc surface of the atomization section (105).

7. A gas fuel injector according to claim 6, characterized in that: The lower surface of the fuel injection screw sleeve (104) is placed on the end face of the convex rib edge (106). A gap is provided between the fuel injection screw sleeve (104) and the convex rib edge (106), and a sealing assembly (8) is movably clamped in the gap.

8. A gas fuel injector according to claim 7, characterized in that: The sealing assembly (8) includes an elastic shrinkage ring (81) arranged in the gap between the fuel injection screw sleeve (104) and the convex rib edge (106). A corrugated section (811) is provided in the middle of the inner arc surface of the elastic shrinkage ring (81), and a nozzle tip (82) is fixedly connected to the lower surface of the elastic shrinkage ring (81).

9. A gas fuel injector according to claim 8, characterized in that: A spherical groove (821) is provided on the inner arc surface of the nozzle tip (82). The lower surface of the nozzle tip (82) is an open end. A ball valve (83) is sleeved on the inner arc surface of the nozzle tip (82), and the outer arc surface of the ball valve (83) abuts against the spherical groove (821).

10. A gas fuel injector according to claim 9, characterized in that: The outer arc surface of the ball valve (83) is in the same plane as the pressure chamber (107). The nozzle tip (82) is placed on the bottom surface of the atomization section (105), and the ball valve (83) is fixedly connected to the pin (72).

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