A gas injector

Abstract

The utility model provides a kind of gas injector, it is characterized by, comprising: upper fixed pipe;Oil injection frame, the upper end of the oil injection frame is connected with upper fixed pipe, the oil injection frame upper has magnetic plate and coil;The oil injection frame has fixed iron core inside, the oil injection frame has the valve post plated with wear-resistant coating inside, the valve post has spring between fixed iron core, the upper fixed pipe is wrapped with injection molding body outside oil injection frame, and the injection molding body is equipped with coil terminal connected with internal coil. By electroplating wear-resistant coating outside valve post, it has extremely high hardness and wear resistance, ensures long-term stable flow consistency, prolongs the service life of oil injection nozzle.

Description

Technical Field

[0001] This utility model relates to a gas injector. Background Technology

[0002] For gas injectors used in gas (including natural gas, hydrogen, etc.) engines, existing technologies have the following problems: the durability and leakage of the injectors are significantly insufficient. Conventional injectors use PTFE material to ensure wear resistance, but this cannot be used for a long time. Utility Model Content

[0003] The purpose of this invention is to address the aforementioned problems in existing technologies by proposing a gas injector that, through electroplating a wear-resistant coating on the valve stem, achieves extremely high hardness and wear resistance, ensuring long-term stable flow consistency and extending the service life of the fuel injector.

[0004] The objective of this utility model can be achieved through the following technical solution: a gas injector, characterized in that it comprises:

[0005] Upper fixed tube;

[0006] The fuel injector frame has an upper end connected to an upper fixed pipe and has a magnetic plate and a coil on it.

[0007] The fuel injector frame contains a fixed iron core and a valve column coated with a wear-resistant coating. A spring is located between the valve column and the fixed iron core. The upper fixed tube and the fuel injector frame are wrapped with an injection molded body. The injection molded body is provided with a coil terminal that connects to the internal coil.

[0008] Furthermore, the upper fixed tube end has a first sealing ring.

[0009] Furthermore, the valve stem end has a second sealing ring, the second sealing ring being made of low-temperature fluororubber.

[0010] Furthermore, the wear-resistant coating is an electroplated diamond-like coating.

[0011] Furthermore, the upper fixed tube contains a filter screen.

[0012] Furthermore, a third sealing ring is provided at the end of the fuel injector.

[0013] Compared with the prior art, the advantages of this application are: by electroplating a wear-resistant coating on the valve stem, it has extremely high hardness and wear resistance, ensuring long-term stable flow consistency and extending the service life of the fuel injector. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the injector;

[0015] Figure 2 This is a schematic diagram of the injector's cross-section;

[0016] In the diagram, 1. Upper fixed tube; 11. First sealing ring; 12. Filter screen; 2. Oil spray frame; 21. Third sealing ring; 22. Second sealing ring; 23. Spring; 24. Fixed iron core; 3. Injection molded body; 31. Coil terminal; 4. Magnetic plate; 41. Coil; 5. Valve column. Detailed Implementation

[0017] The following are specific embodiments of the present invention, and the technical solution of the present invention will be further described in conjunction with the accompanying drawings.

[0018] like Figure 1-2 As shown, a gas injector is characterized by comprising:

[0019] Upper fixed tube 1;

[0020] The oil spray frame 2 is connected to the upper fixed pipe 1 at its upper end, and the oil spray frame 2 has a magnetic plate 4 and a coil 41.

[0021] The fuel injector 2 has a fixed iron core 24 inside, and a valve column 5 coated with a wear-resistant coating inside. A spring 23 is located between the valve column 5 and the fixed iron core 24. The upper fixed tube 1 and the fuel injector 2 are wrapped by an injection molded body 3. The injection molded body 3 is provided with a coil terminal 31 connected to the internal coil 41.

[0022] In this application, the gas enters through the upper fixed pipe 1, is filtered by the filter screen 12, and when the coil terminal 31 is energized, the magnetic plate 4 generates a magnetic field that attracts the valve column 5. The function of the spring 23 is to ensure the stroke of the valve column 5 and ensure the response time so that the dynamic flow of the gas is consistent. The gas is injected downward from the upper fixed pipe 1 and exits through the outlet end of the fuel injector 2. During this process, wear on the valve column 5 and other parts will lead to unstable flow. Therefore, this application electroplats a wear-resistant coating on the valve column 5 to improve wear resistance and increase the service life of the valve column 5.

[0023] Furthermore, the upper fixing tube 1 has a first sealing ring 11 at its end.

[0024] Furthermore, the valve stem 5 has a second sealing ring 22 at its end, and the second sealing ring 22 is made of low-temperature fluororubber.

[0025] Furthermore, the wear-resistant coating is an electroplated diamond-like coating.

[0026] Diamond-like carbon (DLC) coating possesses extremely high hardness and wear resistance. Actual testing showed that, under the same operating conditions, a standard valve stem 5 experienced a flow deviation of ±10% due to wear after 500 hours of continuous operation, while the DLC-plated valve stem 5 maintained a flow deviation within ±3% after 2000 hours of continuous operation. This significantly improved the wear resistance of the fuel injector in harsh environments, ensured long-term stable flow consistency, and substantially extended the fuel injector's service life.

[0027] Furthermore, the upper fixed tube 1 has a filter screen 12 inside.

[0028] Furthermore, a third sealing ring 21 is provided at the end of the oil spray frame 2.

[0029] The aforementioned sealing rings are all used to improve sealing performance. The second sealing ring 22 is a low-temperature fluororubber sealing ring with a temperature resistance range of -49℃ to 200℃, which is wider than that of traditional ordinary sealing rings. In low-temperature environments, the low-temperature resistant sealing ring used in this patent exhibits a sealing performance decrease of only less than 5% at -40℃, providing better sealing performance in low-temperature environments. This effectively solves the problem of gas leakage under cold operating conditions, greatly improves the safety of gas engine operation, ensures stable operation under various complex temperature conditions, and reduces the risk of gas leakage.

[0030] The above-described technical solution of this utility model addresses the problem that existing technical solutions are too simplistic and provides a solution that is significantly different from existing technologies. The parts not covered in this application's technical solution are the same as or can be implemented using existing technologies, and will not be described in detail here.

[0031] The technical solutions in the above embodiments have clearly and completely described the content of this utility model. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

Claims

1. A gas injector, characterized in that, include: Upper fixed tube; The fuel injector frame has an upper end connected to an upper fixed pipe and has a magnetic plate and a coil on it. The fuel injector frame contains a fixed iron core and a valve column coated with a wear-resistant coating. A spring is located between the valve column and the fixed iron core. The upper fixed tube and the fuel injector frame are wrapped with an injection molded body. The injection molded body is provided with a coil terminal that connects to the internal coil.

2. A gas injector according to claim 1, characterized in that: The upper fixed tube has a first sealing ring at its end.

3. A gas injector according to claim 1, characterized in that: The valve stem end has a second sealing ring, which is made of low-temperature fluororubber.

4. A gas injector according to claim 1, characterized in that: The wear-resistant coating is an electroplated diamond-like coating.

5. A gas injector according to claim 1, characterized in that, The upper fixed tube contains a filter screen.

6. A gas injector according to claim 1, characterized in that, The end of the fuel injector is provided with a third sealing ring.

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