A natural gas metering nozzle and engine

Abstract

The utility model relates to an engine technical field especially relates to a natural gas metering nozzle and engine. Natural gas metering nozzle it includes valve body, static core, electromagnetic ring, moving core, adjusting part, elastic part and sealing seat, static core, electromagnetic ring, moving core and elastic part set up in the inside of valve body, sealing seat installs at the export of valve body, electromagnetic ring is located the outer ring of static core and the outer ring of moving core, adjusting part is located the inside of static core and is connected with static core and is in interference, adjusting part has the first gas hole for natural gas passes, the length extension direction of first gas hole and the length extension direction of adjusting part are same direction. Because adjusting part and static core are in interference connection, so can pass through the relative position of adjusting part and static core to the position adjusting of adjusting part, and the initial compression of elastic part is also different with the different position of adjusting part, so can be adjusted according to the natural gas dynamic flow requirement of different model engine to satisfy the dynamic flow requirement of different model engine.

Description

Technical Field

[0001] This utility model relates to the field of engine technology, and in particular to a natural gas metering nozzle and engine. Background Technology

[0002] The natural gas injection system of a natural gas vehicle mainly consists of multiple natural gas nozzles, upper and lower rails, gas connectors, and a PT sensor. The flow stability of the entire rail assembly is controlled by adjusting the natural gas flow rate of each individual nozzle. Therefore, the adjustable natural gas flow nozzle is a key component, directly affecting the stability and reliability of the power system. Because different engine models have different requirements for dynamic natural gas flow rates, different models of natural gas metering nozzles are manufactured for different engine models, leading to increased production costs. Utility Model Content

[0003] The purpose of this invention is to provide a natural gas metering nozzle that can meet the flow requirements of different engines and improve the versatility of the natural gas metering nozzle.

[0004] In one aspect, this utility model provides a natural gas metering nozzle, which includes a valve body, a stationary iron core, an electromagnetic coil, a moving iron core, an adjusting member, an elastic member, and a sealing seat. The stationary iron core, electromagnetic coil, moving iron core, and elastic member are disposed inside the valve body. The sealing seat is installed at the outlet of the valve body. The electromagnetic coil is located on the outer rings of the stationary iron core and the moving iron core. The adjusting member is located inside the stationary iron core and is interference-fitted with the stationary iron core. The adjusting member has a first air hole for natural gas to pass through. The length extension direction of the first air hole is in the same direction as the length extension direction of the adjusting member. One end of the elastic member abuts against the adjusting member, and the other end of the elastic member abuts against the moving iron core. The adjusting member is used to adjust the initial compression of the elastic member.

[0005] As an optional technical solution for the aforementioned natural gas metering nozzle, the adjusting member has an interference fit and a guide fit, the interference fit is fixedly connected to the guide fit, the first gas hole includes a first sub-hole and a second sub-hole, the interference fit has the first sub-hole, the guide fit has the second sub-hole, the first sub-hole and the second sub-hole are connected, the interference fit of the adjusting member is interference-connected to the stationary iron core, and the outer diameter of the interference fit is larger than the outer diameter of the guide fit.

[0006] As an optional technical solution for the aforementioned natural gas metering nozzle, the diameter of the first sub-orifice is larger than the diameter of the second sub-orifice; and / or, the length of the interference fit is smaller than the length of the guide portion.

[0007] As an optional technical solution for the aforementioned natural gas metering nozzle, the second sub-hole is a tapered hole, and the diameter of the second sub-hole tends to decrease from the stationary iron core to the moving iron core.

[0008] As an optional technical solution for the aforementioned natural gas metering nozzle, the sealing seat is provided with an outlet hole along the axial direction, and a sealing ring is protruding on the side of the sealing seat facing the moving iron core, the sealing ring being located on the outer periphery of the outlet hole.

[0009] As an optional technical solution for the aforementioned natural gas metering nozzle, the adjusting member is an integrally formed structure; and / or, the side wall of the adjusting member is provided with a second air hole, the length extension direction of the second air hole being set at an angle to the length extension direction of the first air hole.

[0010] As an optional technical solution for the aforementioned natural gas metering nozzle, the natural gas metering nozzle further includes an inlet pipe, which is integrally formed with the stationary iron core.

[0011] As an optional technical solution for the aforementioned natural gas metering nozzle, the elastic element includes a spring, one end of which abuts against the adjusting element, and the other end of which abuts against the iron core.

[0012] As an optional technical solution for the aforementioned natural gas metering nozzle, the natural gas metering nozzle further includes a filter element located inside the stationary iron core and at the inlet of the regulating element.

[0013] On the other hand, this utility model provides an engine that includes the natural gas metering nozzle of any of the above-mentioned solutions.

[0014] The above technical solution has at least the following advantages or beneficial effects:

[0015] Because the adjusting component is interference-fitted with the stationary iron core, its position can be adjusted by changing its relative position to the stationary iron core. Different positions of the adjusting component result in different initial compression amounts of the elastic component. This allows for adjustment based on the dynamic flow requirements of different engine models to meet their specific needs. The natural gas metering nozzle achieves this by adjusting the position of the adjusting component on the stationary iron core during assembly, enabling the same natural gas metering nozzle to meet the flow requirements of different engines, improving its versatility and reducing production costs. The compression of the elastic component improves the product's flow accuracy, while the fixed position of the moving iron core for the same engine model ensures the consistency of the natural gas metering nozzle, resulting in better vehicle compatibility. Attached Figure Description

[0016] Figure 1This is a cross-sectional view of the natural gas metering nozzle in an embodiment of this utility model;

[0017] Figure 2 This is a cross-sectional view of the adjusting member in an embodiment of this utility model;

[0018] Figure 3 This is a cross-sectional view of the sealing seat provided in an embodiment of the present utility model.

[0019] In the picture:

[0020] 1. Stationary iron core; 2. Electromagnetic coil; 21. Coil outer shell; 22. Coil body; 3. Moving iron core; 4. Adjusting component; 41. Interference fit; 42. Guide section; 43. First air hole; 431. First sub-hole; 432. Second sub-hole; 433. Third sub-hole; 44. Second air hole; 5. Elastic component; 6. Sealing seat; 61. Sealing ring; 62. Air outlet; 7. Filter component; 8. Buffer pad; 9. Rubber positioning component; 10. Air outlet pipe; 11. Air outlet sealing ring; 12. Pin; 13. Plastic part; 14. Filter screen sealing ring; 15. Positioning ring; 16. Air inlet sealing ring. Detailed Implementation

[0021] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0022] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. The terms "first position" and "second position" refer to two different positions. Moreover, "above," "on top of," and "over" the first feature in relation to the second feature includes the first feature directly above and diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "under," and "below" the first feature in relation to the second feature includes the first feature directly below and diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0023] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0024] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0025] like Figure 1 As shown, this embodiment provides a natural gas metering nozzle, which includes a valve body, a stationary iron core 1, an electromagnetic coil, a moving iron core 3, an adjusting member 4, an elastic member 5, and a sealing seat 6. The stationary iron core 1, electromagnetic coil, moving iron core 3, and elastic member 5 are disposed inside the valve body. The sealing seat 6 is installed at the outlet of the valve body. The electromagnetic coil is located on the outer ring of the stationary iron core 1 and the outer ring of the moving iron core 3. The adjusting member 4 is located inside the stationary iron core 1 and is interference-fitted with the stationary iron core 1. The adjusting member 4 has a first air hole 43 for natural gas to pass through. The length extension direction of the first air hole 43 is in the same direction as the length extension direction of the adjusting member 4. One end of the elastic member 5 abuts against the adjusting member 4, and the other end of the elastic member 5 abuts against the moving iron core 3. The adjusting member 4 is used to adjust the initial compression amount of the elastic member 5.

[0026] Since the adjusting component 4 is interference-fitted with the stationary iron core 1, the position of the adjusting component 4 can be adjusted by adjusting the relative position of the adjusting component 4 and the stationary iron core 1. Different positions of the adjusting component 4 result in different initial compression amounts of the elastic component 5. This allows for adjustment according to the dynamic flow requirements of natural gas for different engine models to meet their specific needs. The natural gas metering nozzle can meet these requirements by adjusting the position of the adjusting component 4 on the stationary iron core 1 during assembly. This enables the same natural gas metering nozzle to meet the flow requirements of different engines, improving the versatility of the natural gas metering nozzle and reducing its production cost.

[0027] like Figure 2As shown, in some embodiments, the adjusting member 4 has an interference portion 41 and a guide portion 42. The interference portion 41 is fixedly connected to the guide portion 42. The first air hole 43 includes a first sub-hole 431 and a second sub-hole 432. The interference portion 41 has a first sub-hole 431, and the guide portion 42 has a second sub-hole 432. The first sub-hole 431 and the second sub-hole 432 are connected. The interference portion 41 of the adjusting member 4 is interference-connected to the stationary iron core 1. The outer diameter of the interference portion 41 is larger than the outer diameter of the guide portion 42.

[0028] The first sub-hole 431 and the second sub-hole 432 are coaxially arranged, which facilitates the flow of natural gas from the first gas hole 43. The outer diameter of the interference part 41 is larger than the outer diameter of the guide part 42. Therefore, the interference part 41 can be interference-fitted with the stationary iron core 1 to avoid the adjusting member 4 from being stuck to the inner wall of the stationary iron core 1, which would make the adjustment of the adjusting member 4 time-consuming and laborious.

[0029] In some embodiments, the diameter of the first sub-hole 431 is larger than the diameter of the second sub-hole 432.

[0030] The above scheme enables natural gas to enter the regulating component 4 and the first sub-hole 431 as quickly as possible. When the natural gas in the first sub-hole 431 enters the second sub-hole 432, the gas pressure of the natural gas increases due to the reduced orifice diameter, thereby ensuring that the pressure of the natural gas sprayed from the natural gas metering nozzle meets the requirements.

[0031] In some embodiments, the length of the interference portion 41 is less than the length of the guide portion 42.

[0032] The above configuration ensures that the adjusting component 4 and the stationary iron core 1 are interference-fitted, while making it more convenient to assemble the adjusting component 4 and the stationary iron core 1 and reducing the contact area between the adjusting component 4 and the stationary iron core 1.

[0033] In some embodiments, the second sub-hole 432 is a tapered hole, and the diameter of the second sub-hole 432 tends to decrease from the stationary iron core 1 to the moving iron core 3.

[0034] The above configuration allows the natural gas pressure to increase as it flows out, thereby ensuring that the pressure of the natural gas ejected from the natural gas metering nozzle meets the requirements.

[0035] like Figure 2 As shown, in some embodiments, the first vent 43 further includes a third sub-vent 433, wherein the first sub-vent 431, the second sub-vent 432, and the third sub-vent 433 are sequentially connected. The third sub-vent 433 is provided to guide the natural gas.

[0036] In some embodiments, the adjusting member 4 is a one-piece molded structure.

[0037] That is, the interference fit 41 and the guide 42 are integrally formed and obtained at the same time, and the regulating component 4 is a single structure. In this way, the regulating component 4 has no welding gaps, which simplifies the process, reduces gas leakage, and improves reliability.

[0038] In some embodiments, the sidewall of the adjusting member 4 is provided with a second air hole 44, and the length extension direction of the second air hole 44 is set at an angle to the length extension direction of the first air hole 43.

[0039] The number of second air holes 44 is not less than two. When the number of second air holes 44 is more than two, the second air holes 44 are arranged along the axial direction of the adjusting member 4 and are arranged along the circumferential direction of the outer peripheral wall of the adjusting member 4, thereby increasing the air supply.

[0040] like Figure 3 As shown, in some embodiments, the sealing seat 6 is provided with an air outlet 62 along the axial direction, and a sealing ring 61 protrudes from the side of the sealing seat 6 facing the moving iron core 3, with the sealing ring 61 located on the outer periphery of the air outlet 62.

[0041] The sealing ring 61 protrudes to facilitate contact with the end face of the moving iron core 3, thereby achieving the purpose of sealing with the moving iron core 3. Since the area of ​​the sealing ring is smaller than the area of ​​the end face of the sealing seat 6 facing the moving iron core 3, the machining accuracy of the sealing ring 61 can be improved, thereby improving the sealing performance between the sealing seat 6 and the moving iron core 3.

[0042] In some embodiments, the natural gas metering nozzle includes an inlet pipe, which is integrally formed with the stationary iron core 1.

[0043] The intake pipe and the stationary iron core 1 are integrally formed, which eliminates assembly steps and assembly gaps, simplifying the process, reducing gas leakage, and improving reliability.

[0044] For example, an intake sealing ring 16 is provided on the outer periphery of the intake pipe to improve the sealing performance of the outer periphery of the intake pipe.

[0045] like Figure 1 As shown, in some embodiments, the elastic element 5 includes a spring, one end of which abuts against the adjusting element 4, and the other end of which abuts against the moving iron core 3.

[0046] The compression of the spring can be adjusted under the action of the adjusting element 4. The spring abuts against the moving iron core 3. After the electromagnetic coil 2 is energized, the instantaneous dynamic flow rate can be adjusted.

[0047] In some embodiments, a positioning ring 15 is provided on the outer periphery of the stationary iron core 1, and the electromagnetic coil 2 is located on the side of the positioning ring 15 away from the air intake pipe. The positioning ring 15 can be used to position the electromagnetic coil 2.

[0048] In some embodiments, the natural gas metering nozzle further includes a filter element 7 located inside the stationary iron core 1 and at the inlet of the regulating element 4.

[0049] After the filter element 7 filters the natural gas, it enters the regulating element 4. The natural gas flows from the regulating element 4 into the gap between the moving iron core 3 and the sealing seat 6 and flows out through the third air hole of the sealing seat 6 to the natural gas metering nozzle.

[0050] For example, the filter element 7 includes a filter screen, which is sealed to the stationary iron core 1 through a filter screen sealing ring 14 to prevent natural gas from entering the regulating element 4 directly through the gap between the filter screen and the stationary iron core 1 without passing through the filter element 7.

[0051] like Figure 1 As shown, the electromagnetic coil 2 includes a coil body 22 and a coil shell 21. The coil body 22 is located within the area enclosed by the coil shell 21. The coil body 22 is located on the outer ring of the stationary iron core 1. The portion of the moving iron core 3 facing the stationary iron core 1 is located within the area enclosed by the coil shell 21. The electromagnetic coil 2 is connected to the pin 12. A plastic part 13 is injected at the connection between the pin 12 and the electromagnetic coil 2 to prevent the connection from being exposed.

[0052] The natural gas metering nozzle also includes a buffer pad 8 and a rubber positioning element 9, wherein the rubber positioning element 9 is interference-fitted with the coil housing 21 and the sealing seat 6 respectively, and the rubber positioning element 9 is used to connect the sealing seat 6 and the coil housing 21.

[0053] The natural gas metering nozzle also includes an outlet pipe 10, and a sealing seat 6 is connected to the outlet pipe 10, enabling the natural gas in the sealing seat 6 to enter the outlet pipe 10. In addition, an outlet sealing ring 11 and a sealing seat sealing ring are also fitted around the outer periphery of the sealing seat 6. One side of the sealing seat sealing ring abuts against the electromagnetic coil 2, and the other side of the sealing seat sealing ring abuts against the outlet sealing ring 11.

[0054] The coil body 22 is positioned corresponding to the stationary iron core 1, and is used to induce a magnetic field in the stationary iron core 1 through electromagnetic force after the coil body 22 is energized. The pin 12 is connected to the coil body 22. The pin 12 is surrounded by a plastic part 13, which ensures the safety and convenience of electricity use when the pin 12 on the coil body 22 is energized with external power.

[0055] When the moving iron core 3 moves back and forth relative to the stationary iron core 1 within the space enclosed by the electromagnetic coil 2, the dynamic flow rate of the natural gas metering nozzle can be adjusted by adjusting the position of the adjusting component relative to the stationary iron core 1 during assembly.

[0056] The present invention also provides an engine comprising the natural gas metering nozzle provided in any of the above embodiments.

[0057] Since the natural gas metering nozzle provided in any of the above embodiments is included, and since the adjusting member 4 is interference-fitted with the stationary iron core 1, the position of the adjusting member 4 can be adjusted by adjusting the relative position of the adjusting member 4 and the stationary iron core 1. Different positions of the adjusting member 4 result in different compression amounts of the elastic member 5. Thus, the natural gas metering nozzle can meet the dynamic flow requirements of natural gas for different engine models by adjusting the position of the adjusting member 4 on the stationary iron core 1 during assembly, thereby enabling the same natural gas metering nozzle to meet the flow requirements of different engines.

[0058] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A natural gas metering nozzle, characterized in that, The valve body includes a stationary iron core (1), an electromagnetic coil, a moving iron core (3), an adjusting member (4), an elastic member (5), and a sealing seat (6). The stationary iron core (1), electromagnetic coil, moving iron core (3), and elastic member (5) are disposed inside the valve body. The sealing seat (6) is installed at the outlet of the valve body. The electromagnetic coil is located on the outer ring of the stationary iron core (1) and the outer ring of the moving iron core (3). The adjusting member (4) is located inside the stationary iron core (1) and is interference-fitted with the stationary iron core (1). The adjusting member (4) has a first gas hole (43) for natural gas to pass through. The length extension direction of the first gas hole (43) is in the same direction as the length extension direction of the adjusting member (4). One end of the elastic member (5) abuts against the adjusting member (4), and the other end of the elastic member (5) abuts against the moving iron core (3). The adjusting member (4) is used to adjust the initial compression of the elastic member (5).

2. The natural gas metering nozzle according to claim 1, characterized in that, The adjusting member (4) has an interference fit (41) and a guide part (42). The interference fit (41) is fixedly connected to the guide part (42). The first air hole (43) includes a first sub-hole (431) and a second sub-hole (432). The interference fit (41) has the first sub-hole (431), and the guide part (42) has the second sub-hole (432). The first sub-hole (431) and the second sub-hole (432) are connected. The interference fit (41) of the adjusting member (4) is interference-connected to the stationary iron core (1). The outer diameter of the interference fit (41) is larger than the outer diameter of the guide part (42).

3. The natural gas metering nozzle according to claim 2, characterized in that, The diameter of the first sub-hole (431) is larger than the diameter of the second sub-hole (432); and / or, The length of the interference section (41) is less than the length of the guide section (42).

4. The natural gas metering nozzle according to claim 2, characterized in that, The second sub-hole (432) is a tapered hole, and the diameter of the second sub-hole (432) tends to decrease from the stationary iron core (1) to the moving iron core (3).

5. The natural gas metering nozzle according to any one of claims 1-4, characterized in that, The sealing seat (6) is provided with an air outlet (62) along the axial direction. The sealing seat (6) is provided with a sealing ring (61) protruding on the side facing the moving iron core (3). The sealing ring (61) is located on the outer periphery of the air outlet (62).

6. The natural gas metering nozzle according to any one of claims 1-4, characterized in that, The adjusting member (4) is an integrally formed structure; and / or, the side wall of the adjusting member (4) is provided with a second air hole (44), and the length extension direction of the second air hole (44) is set at an angle to the length extension direction of the first air hole (43).

7. The natural gas metering nozzle according to any one of claims 1-4, characterized in that, The natural gas metering nozzle also includes an air inlet pipe, which is integrally formed with the stationary iron core (1).

8. The natural gas metering nozzle according to any one of claims 1-4, characterized in that, The elastic element (5) includes a spring, one end of which abuts against the adjusting element (4), and the other end of which abuts against the iron core.

9. The natural gas metering nozzle according to any one of claims 1-4, characterized in that, The natural gas metering nozzle also includes a filter element (7), which is located inside the stationary iron core (1) and at the inlet of the regulating element (4).

10. An engine, characterized in that, Includes the natural gas metering nozzle as described in any one of claims 1-9.

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