CN221568687U - High leakproofness's sprayer - Google Patents
High leakproofness's sprayer Download PDFInfo
- Publication number
- CN221568687U CN221568687U CN202420821990.4U CN202420821990U CN221568687U CN 221568687 U CN221568687 U CN 221568687U CN 202420821990 U CN202420821990 U CN 202420821990U CN 221568687 U CN221568687 U CN 221568687U
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- CN
- China
- Prior art keywords
- oil
- oil sprayer
- sprayer
- sprayer body
- limit block
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- 230000001105 regulatory effect Effects 0.000 claims abstract description 27
- 230000008878 coupling Effects 0.000 claims abstract description 19
- 238000010168 coupling process Methods 0.000 claims abstract description 19
- 238000005859 coupling reaction Methods 0.000 claims abstract description 19
- 239000000446 fuel Substances 0.000 claims description 36
- 238000007789 sealing Methods 0.000 abstract description 11
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 239000003921 oil Substances 0.000 description 81
- 239000000295 fuel oil Substances 0.000 description 7
- 238000002485 combustion reaction Methods 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000003595 mist Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
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- Fuel-Injection Apparatus (AREA)
Abstract
The utility model discloses a high-tightness oil sprayer, which relates to the technical field of oil sprayers and structurally comprises an oil sprayer body, a lift limiting block and an oil sprayer coupling piece, the oil sprayer body is connected with a pressure regulating washer, a pressure regulating spring and a spring seat in sequence, and the oil sprayer coupling consists of a needle valve body and a needle valve. Wherein, the upper end of the oil sprayer body extends to one side to form a convex part, the oil inlet channel is penetrated to the bottom of the oil sprayer body from the convex part, the oil filter core is embedded in the oil inlet channel of the convex part and is tightly matched with the inner wall of the oil inlet channel. The technical scheme has reasonable design, cancels the structure of the threaded connection of the traditional oil sprayer body and the oil inlet joint, replaces the oil sprayer body integrally formed with the convex part of the oil inlet end, ensures the high-pressure sealing property of the oil sprayer, improves the reliability of the diesel engine, and reduces the manufacturing cost of the diesel engine.
Description
Technical Field
The application relates to the technical field of fuel injectors, in particular to a fuel injector with high tightness.
Background
With the global industry development, diesel economy and environmental protection have become one of the most interesting issues. The requirements of domestic and foreign markets on the energy conservation, material saving, reliability and other aspects of diesel engines are becoming strict. Increasing fuel injection pressure of fuel injection systems, reducing fuel consumption, improving exhaust emissions during combustion, and reducing noise are a necessary trend in the development of diesel engines. The fuel injector is the most important part in the fuel system, and has the function of increasing the fuel pressure, and spraying a certain amount of high-pressure oil into the combustion chamber of the engine in a mist form according to the working condition requirement of the diesel engine, so that the piston reciprocates.
At present, domestic fuel injector manufacturers all adopt the following structures: the oil inlet end of the oil sprayer body is provided with an internal thread, the oil inlet connector is in threaded connection with the oil inlet end of the oil sprayer body, and the oil inlet connector is sealed under high pressure by adopting a sealing gasket. This structure has the following disadvantages: 1. the parts are more, and the manufacturing cost is high. 2. The high-pressure sealing is carried out by adopting the sealing gasket, so that the risk of oil leakage exists, and the reliability of the diesel engine is reduced.
Disclosure of utility model
The utility model aims to solve the technical problems of optimizing the oil sprayer and reducing parts such as an oil inlet joint, thereby reducing the risk of oil leakage of the oil sprayer, improving the reliability of the diesel engine and simultaneously reducing the manufacturing cost of the diesel engine.
In order to solve the technical problems, the high-tightness oil sprayer comprises an oil sprayer body 1, wherein the lower end of the oil sprayer body 1 is sequentially provided with a lifting limit block 6 and an oil sprayer coupling 8 from top to bottom. The oil sprayer body 1 further comprises an oil filter core 12b, a protruding portion is formed at the upper end of the oil sprayer body 1 in a extending mode to one side, an oil inlet channel is formed in the oil sprayer body 1, the oil inlet channel penetrates through the bottom of the oil sprayer body 1 from the protruding portion, and the oil filter core 12b is embedded in the oil inlet channel of the protruding portion.
Further, as one of preferable modes of the high-tightness fuel injector: the length of the convex part is larger than that of the oil filter core 12b, and the oil filter core 12b is fully arranged in the oil inlet channel of the convex part and is tightly matched with the inner wall of the oil inlet channel.
Further, as one of preferable modes of the high-tightness fuel injector: a first cavity is arranged between the oil sprayer body 1 and the lift limit block 6, and a pressure regulating spring 3 and a spring seat 4 are arranged in the first cavity. A second cavity is arranged between the lift limit block 6 and the oil nozzle coupling 8, a needle valve 8b is arranged in the second cavity, and the needle valve 8b penetrates through the lift limit block 6 and is connected with the spring seat 4.
Further, as one of preferable modes of the high-tightness fuel injector: the pressure regulating device further comprises a pressure regulating gasket 2 for regulating the tension of the pressure regulating spring 3, wherein the pressure regulating gasket 2 is positioned between the pressure regulating spring 3 and the inner wall of the first cavity.
Further, as one of preferable modes of the high-tightness fuel injector: the oil sprayer further comprises an oil sprayer tight cap 9 which is screwed at the lower end of the oil sprayer body 1, an opening is formed in the middle of the oil sprayer tight cap 9, a shoulder is arranged on the inner wall of the oil sprayer tight cap 9, the oil sprayer coupling 8 penetrates through the opening and is limited by the shoulder, and the oil sprayer coupling 8 and the lift limit block 6 are fixed at the lower end of the oil sprayer body 1 through the oil sprayer tight cap 9.
Further, as one of preferable modes of the high-tightness fuel injector: the lift stop 6 connects the injector body 1 with the injector coupling 8 via a locating pin.
Further, as one of preferable modes of the high-tightness fuel injector: the positioning pin is divided into a first positioning pin 5 which is positioned between the lower end of the oil sprayer body 1 and the upper end of the lifting limit block 6 and is used for preventing the lower end and the upper end of the lifting limit block 6 from generating relative rotation, and a second positioning pin 7 which is positioned between the lower end of the lifting limit block 6 and the upper end of the oil sprayer coupling 8.
In summary, the utility model has the advantages that: parts such as an oil inlet connector and a sealing gasket which are in threaded sealing connection with an oil injector body in a traditional oil injector are omitted, and the parts are replaced by the oil injector body which is integrally formed with the convex part of the oil inlet end, so that the high-pressure sealing property of the oil injector is ensured, the reliability of a diesel engine is improved, and meanwhile, the manufacturing cost of the diesel engine is reduced.
Drawings
Fig. 1 is a cross-sectional view of an embodiment of the present application.
Reference numerals illustrate: 1. an oil injector body; 2. a pressure regulating gasket; 3. a pressure regulating spring; 4. a spring seat; 5. a first positioning pin; 6. a lift limit block; 7. a second positioning pin; 8. an oil nozzle coupling; 8a, needle valve body; 8b, needle valve; 9. the fuel injector is tightly covered; 10. a first sealing gasket; 11. a second sealing gasket; 12. an oil feed joint assembly; 12a, an oil inlet joint; 12b, an oil filter core.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
Examples
The high-tightness oil sprayer comprises an oil sprayer body 1, wherein the lower end of the oil sprayer body 1 is sequentially provided with a lifting limit block 6 and an oil sprayer coupling 8 from top to bottom. The oil sprayer body 1 further comprises an oil filter core 12b, a protruding portion is formed at the upper end of the oil sprayer body 1 in a extending mode to one side, an oil inlet channel is formed in the oil sprayer body 1, the oil inlet channel penetrates through the bottom of the oil sprayer body 1 from the protruding portion, and the oil filter core 12b is embedded in the oil inlet channel of the protruding portion.
Through adopting above-mentioned technical scheme, oil atomizer body 1 and oil feed end convex part integrated into one piece have replaced traditional oil atomizer body 1 and have advanced the connection between the oil feed joint 12a, have cancelled parts such as oil feed joint 12a, first sealing washer 11, have fundamentally reduced the risk of oil leak, have improved diesel engine's reliability.
The length of the convex part is larger than that of the oil filter core 12b, and the oil filter core 12b is fully arranged in the oil inlet channel of the convex part and is tightly matched with the inner wall of the oil inlet channel. In order to achieve a minimum clearance on the premise of ensuring the throughput of fuel oil, and prevent impurities in the fuel oil from entering the fuel injector body, a certain clearance exists between a filter core hole at the fuel inlet end of the fuel injector body and the fuel oil core, the depth of the fuel oil core 12b pressed into the fuel inlet channel needs to be ensured, and the outer diameter of the fuel oil core 12b needs to be only slightly smaller than the inner diameter of the fuel inlet channel so as to enable the fuel oil core and the fuel oil core to be tightly matched.
A first cavity is arranged between the oil sprayer body 1 and the lift limit block 6, and a pressure regulating spring 3 and a spring seat 4 are arranged in the first cavity. A second cavity is arranged between the lift limit block 6 and the oil nozzle coupling 8, a needle valve 8b is arranged in the second cavity, and the needle valve 8b penetrates through the lift limit block 6 and is connected with the spring seat 4. The pressure regulating washer 2 is located between the pressure regulating spring 3 and the inner wall of the first cavity, the pressure regulating washer 2 is used for regulating the compression amount of the pressure regulating spring 3, so that the tensioning force of the pressure regulating spring 3 is regulated, and the tensioning force of the pressure regulating spring 3 is transmitted to the needle valve 8b through the spring seat 4 to control the opening pressure of the needle valve. The comprehensive performance detection is carried out on a special oil sprayer test bed, and the pressure-regulating gaskets 2 with different thicknesses can be replaced to ensure that the performance of the needle valve opening pressure is qualified.
The fuel injector tight cap 9 is arranged at the lower end of the fuel injector body 1 in a threaded manner, a hole is formed in the middle of the fuel injector tight cap 9, a shoulder is arranged on the inner wall of the fuel injector tight cap 9, the fuel injector coupling 8 penetrates through the hole and is limited by the shoulder, and the fuel injector coupling 8 and the lift limit block 6 are fixed at the lower end of the fuel injector body 1 through the fuel injector tight cap 9. And (3) detecting comprehensive performance on a special oil sprayer test bed, and sleeving a sealing gasket 10 on the oil sprayer coupling piece 8 after the detection is qualified, and then connecting with an engine cylinder body.
In order to fix the lift stop 6 between the injector body 1 and the injector mount 8 without relative rotation, the lift stop 6 connects the injector body 1 and the injector mount 8 by a positioning pin, which is divided into a first positioning pin 5 located between the lower end of the injector body 1 and the upper end of the lift stop 6 to prevent relative rotation therebetween, and a second positioning pin 7 located between the lower end of the lift stop 6 and the upper end of the injector mount 8.
The embodiments of the present utility model have been described in detail with reference to the accompanying drawings, but the present utility model is not limited to the above embodiments, and equivalent changes of structure, shape and principle within the knowledge of those skilled in the art are within the scope of the present utility model.
Claims (7)
1. The utility model provides a high leakproofness's sprayer, includes the sprayer body (1), sprayer body (1) lower extreme is equipped with lift limiting block (6) and fuel sprayer coupling part (8) from last to lower in proper order, sprayer body (1) still include oil cleaner core (12 b), its characterized in that: the oil sprayer is characterized in that a protruding portion (1 a) is formed at the upper end of the oil sprayer body (1) in an extending mode to one side, an oil inlet channel is formed in the oil sprayer body (1), the oil inlet channel penetrates through the bottom of the oil sprayer body (1) from the protruding portion (1 a), and the oil filter core (12 b) is embedded in the oil inlet channel of the protruding portion (1 a).
2. A high tightness fuel injector as defined in claim 1, wherein: the length of the convex part (1 a) is larger than that of the oil filter core (12 b), and the oil filter core (12 b) is fully arranged in an oil inlet channel of the convex part (1 a) and is tightly matched with the inner wall of the oil inlet channel.
3. A high tightness fuel injector as defined in claim 1, wherein: a first cavity is arranged between the oil sprayer body (1) and the lift limit block (6), and a pressure regulating spring (3) and a spring seat (4) are arranged in the first cavity;
A second cavity is formed between the lift limit block (6) and the oil nozzle coupling piece (8), a needle valve (8 b) is arranged in the second cavity, and the needle valve (8 b) penetrates through the lift limit block (6) to be connected with the spring seat (4).
4. A high tightness fuel injector according to claim 3, wherein: the pressure regulating device further comprises a pressure regulating gasket (2) for regulating the tension of the pressure regulating spring (3), and the pressure regulating gasket (2) is positioned between the pressure regulating spring (3) and the inner wall of the first cavity.
5. A high tightness fuel injector as defined in claim 1, wherein: the oil sprayer is characterized by further comprising an oil sprayer tight cap (9) which is screwed at the lower end of the oil sprayer body (1), an opening is formed in the middle of the oil sprayer tight cap (9), a shoulder is arranged on the inner wall of the oil sprayer tight cap (9), an oil sprayer coupling (8) penetrates through the opening and is limited by the shoulder, and the oil sprayer coupling (8) and the lift limit block (6) are fixed at the lower end of the oil sprayer body (1) through the oil sprayer tight cap (9).
6. A high tightness fuel injector as defined in claim 1, wherein: the lift limit block (6) is connected with the oil sprayer body (1) and the oil sprayer coupling piece (8) through a locating pin.
7. The high tightness fuel injector of claim 6 wherein: the locating pin is divided into a first locating pin (5) which is positioned between the lower end of the oil sprayer body (1) and the upper end of the lifting limit block (6) and is used for preventing relative rotation between the lower end of the lifting limit block (6) and the upper end of the oil sprayer matching part (8), and a second locating pin (7) which is positioned between the lower end of the lifting limit block (6) and the upper end of the oil sprayer matching part (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202420821990.4U CN221568687U (en) | 2024-04-19 | 2024-04-19 | High leakproofness's sprayer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202420821990.4U CN221568687U (en) | 2024-04-19 | 2024-04-19 | High leakproofness's sprayer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN221568687U true CN221568687U (en) | 2024-08-20 |
Family
ID=92287351
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202420821990.4U Active CN221568687U (en) | 2024-04-19 | 2024-04-19 | High leakproofness's sprayer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN221568687U (en) |
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2024
- 2024-04-19 CN CN202420821990.4U patent/CN221568687U/en active Active
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| GR01 | Patent grant | ||
| GR01 | Patent grant |