CN217873084U - Ejector rod of fuel nozzle - Google Patents
Ejector rod of fuel nozzle Download PDFInfo
- Publication number
- CN217873084U CN217873084U CN202222491841.XU CN202222491841U CN217873084U CN 217873084 U CN217873084 U CN 217873084U CN 202222491841 U CN202222491841 U CN 202222491841U CN 217873084 U CN217873084 U CN 217873084U
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- boss
- fuel
- oil
- ejector pin
- spring
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Abstract
The utility model discloses a fuel injector's ejector pin relates to fuel injector technical field, including ejector pin body and fuel sprayer spring, the ejector pin body includes the guide bar, the fixed two sets of arc spacing rings that are equipped with in middle part of ejector pin body, the fixed circular oil baffle that is equipped with in upper end of guide bar, the fixed boss that is equipped with in upper end of circular oil baffle, the utility model discloses in, can guide the fuel to pass the outside of boss with higher speed through a plurality of oil grooves of leading of seting up in the boss outside, avoid the direct front end of assaulting the boss of fuel, seted up spherical buffering hole at the front end of boss simultaneously, further reduced fuel pressure, slowed down the metal fatigue of boss promptly to set up two sets of arc spacing rings and seted up two vertical planes in the outside of guide bar, when having made things convenient for ejector pin body and fuel sprayer spring mounting, can also prevent to produce between ejector pin body and the fuel sprayer spring not hard up, reduced fuel injector's work efficiency.
Description
Technical Field
The utility model relates to a fuel nozzle technical field especially relates to a fuel nozzle's ejector pin.
Background
The fuel nozzle belongs to the technical field of engines and comprises a cavity, an oil valve and a nozzle cap, wherein when the pressure of fuel in an oil cavity is higher than a fixed value, the oil valve is opened, the fuel is sprayed out through the nozzle cap, the oil valve comprises a valve body, a valve seat and a spring, the rear end of the valve seat is connected with the cavity to form the oil cavity, the cavity is provided with an inlet channel entering the oil cavity, the spring is positioned in the oil cavity and acts between the valve body and the valve seat to close the oil valve, the front end of the valve seat is connected with the nozzle cap to form a residual volume, and the nozzle cap is provided with a spray hole connected with the residual volume;
traditional valve body and disk seat are integrated into one piece usually, and collectively refer to the ejector pin, and the ejector pin generally with injection nozzle spring interference fit, the external diameter of ejector pin is greater than the internal diameter of injection nozzle spring promptly, this kind of cooperation mode is simple reliable, but needs frequent maintenance to be changed for prevent that the injection nozzle spring from producing metal fatigue, reduce fuel injector's work efficiency, the front end of ejector pin is simultaneously because fuel pressure is great, also can produce metal fatigue easily, provides a fuel injector's ejector pin for this reason.
SUMMERY OF THE UTILITY MODEL
The utility model aims at solving the problem that the ejector pin produces clearance fit with the fuel sprayer spring easily in long-time use among the prior art, and the ejector pin of a fuel sprayer who provides.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
the ejector rod of the fuel nozzle comprises an ejector rod body and a fuel injection nozzle spring, wherein the ejector rod body comprises a guide rod, two groups of arc-shaped limiting rings are fixedly arranged in the middle of the ejector rod body, a circular oil baffle plate is fixedly arranged at the upper end of the guide rod, and a boss is fixedly arranged at the upper end of the circular oil baffle plate;
the lower end surface of the circular oil baffle is conical, and cylindrical oil storage channels are formed in the guide rod and the circular oil baffle;
many oil grooves of leading have been seted up to the outside equipartition of boss, spherical buffering hole has been seted up at the upper end middle part of boss.
The above technical solution further comprises:
the distance between the arc-shaped limiting rings of the uppermost group and the lower end face of the circular oil baffle plate is equal to the diameter of a spring wire of the oil nozzle spring, and the distance between the two groups of arc-shaped limiting rings is smaller than the inner diameter of the oil nozzle spring.
The above technical solution further comprises:
two vertical planes are symmetrically milled in the middle of the guide rod.
The outer diameter of the circular oil baffle is larger than that of the lug boss.
The number of the oil guide grooves is 6, the oil guide grooves are spirally arranged, the spiral angle of each oil guide groove is 30 degrees, and the spiral angle of each oil guide groove is opposite to the spiral direction of the oil nozzle spring.
The diameter of the spherical buffer hole is 1/2 of the diameter of the boss.
Compared with the prior art, the beneficial effects of the utility model are that:
the utility model discloses in, a plurality of oil grooves of leading offered through the boss outside can guide the fuel to pass the outside of boss with higher speed, avoid the fuel to directly strike the front end of boss, spherical buffer hole has been seted up at the front end of boss simultaneously, further fuel pressure has been reduced, the metal fatigue of boss has been slowed down promptly, and set up two sets of arc spacing rings and seted up two vertical planes in the outside of guide bar, when having made things convenient for ejector pin body and fuel sprayer spring mounting, can also prevent to produce between ejector pin body and the fuel sprayer spring not hard up, the work efficiency of fuel nozzle has been reduced.
Drawings
Fig. 1 is a schematic perspective view of a push rod body and an oil nozzle spring according to the present invention;
fig. 2 is a schematic view of a three-dimensional structure of the ejector rod body provided by the present invention;
fig. 3 is a cross-sectional view of the guide bar of the present invention;
fig. 4 is the schematic diagram of the spherical buffer hole structure provided by the utility model.
In the figure: 1. a mandril body; 2. a fuel injector spring; 101. a guide bar; 102. an arc-shaped limiting ring; 103. a circular oil baffle; 104. a boss; 105. an oil guide groove; 106. a spherical buffer hole.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.
As shown in fig. 1-4, the utility model provides a top rod of a fuel nozzle, which comprises a top rod body 1 and a fuel nozzle spring 2, wherein the top rod body 1 comprises a guide rod 101, two sets of arc-shaped limiting rings 102 are fixedly arranged in the middle of the top rod body 1, a circular oil baffle plate 103 is fixedly arranged at the upper end of the guide rod 101, and a boss 104 is fixedly arranged at the upper end of the circular oil baffle plate 103;
the lower end surface of the circular oil baffle plate 103 is conical, cylindrical oil storage channels are formed in the guide rod 101 and the circular oil baffle plate 103, and the cylindrical oil storage channels can increase the impact pressure of fuel oil;
a plurality of oil guide grooves 105 are uniformly distributed on the outer side of the boss 104, and a spherical buffer hole 106 is formed in the middle of the upper end of the boss 104.
Further, the distance between the uppermost group of arc-shaped limiting rings 102 and the lower end face of the circular oil baffle plate 103 is equal to the diameter of the spring wire of the oil nozzle spring 2, and the distance between the two groups of arc-shaped limiting rings 102 is smaller than the inner diameter of the oil nozzle spring 2.
Further, two vertical planes are symmetrically milled in the middle of the guide rod 101.
Further, the outer diameter of the circular oil baffle 103 is larger than that of the boss 104.
Further, the number of leading oil groove 105 is 6, and leads oil groove 105 and be the spiral setting, and the helix angle who leads oil groove 105 is 30, leads oil groove 105's helix angle and the 2 opposite direction of spiral of fuel sprayer spring.
Further, the diameter of the spherical buffer hole 106 is 1/2 of the diameter of the boss 104.
In this embodiment, two sets of arc spacing rings 102 have been set up through the outside at guide bar 101, can make things convenient for whole ejector pin body 1 to install in the upper end of fuel sprayer spring 2, when fuel sprayer spring 2 produced metal fatigue, two sets of arc spacing rings 102 also can produce limiting displacement to fuel sprayer spring 2, prevent to produce between ejector pin body 1 and the fuel sprayer spring 2 not hard up, clearance fit promptly, fuel sprayer's life has been prolonged, a plurality of oil grooves 105 of leading have been seted up in the outside of boss 104 simultaneously, can slow down the fuel pressure at top, reduce the direct impact force to boss 104 of fuel oil, and spherical buffer hole 106 can also play water conservancy diversion cushioning effect to the fuel, whole ejector pin body's life has further been prolonged.
The above, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, the concept of which is equivalent to replace or change, should be covered within the protection scope of the present invention.
Claims (6)
1. The ejector rod of the fuel nozzle is characterized by comprising an ejector rod body (1) and a fuel nozzle spring (2), wherein the ejector rod body (1) comprises a guide rod (101), two groups of arc-shaped limiting rings (102) are fixedly arranged in the middle of the ejector rod body (1), a circular oil baffle plate (103) is fixedly arranged at the upper end of the guide rod (101), and a boss (104) is fixedly arranged at the upper end of the circular oil baffle plate (103);
the lower end surface of the circular oil baffle plate (103) is conical, and cylindrical oil storage channels are formed in the guide rod (101) and the circular oil baffle plate (103);
a plurality of oil guide grooves (105) are uniformly formed in the outer side of the boss (104), and a spherical buffer hole (106) is formed in the middle of the upper end of the boss (104).
2. The carrier rod of a fuel injection nozzle as set forth in claim 1, wherein the distance between the uppermost set of said arc-shaped retainer rings (102) and the lower end surface of the circular oil baffle (103) is equal to the diameter of the spring wire of the injector spring (2), and the distance between the two sets of said arc-shaped retainer rings (102) is smaller than the inner diameter of the injector spring (2).
3. A fuel nozzle carrier rod as claimed in claim 1, characterized in that the guide rod (101) is centrally symmetrically milled with two vertical planes.
4. A push rod of a fuel injection nozzle as claimed in claim 1, wherein an outer diameter of the circular oil baffle plate (103) is larger than an outer diameter of the boss (104).
5. The plunger of a fuel injection nozzle according to claim 1, wherein the number of the oil guide grooves (105) is 6, and the oil guide grooves (105) are spirally formed, the spiral angle of the oil guide grooves (105) is 30 °, and the spiral angle of the oil guide grooves (105) is opposite to the spiral direction of the nozzle spring (2).
6. A fuel nozzle carrier rod as set forth in claim 1, characterized in that the diameter of the spherical relief hole (106) is 1/2 of the diameter of the boss (104).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222491841.XU CN217873084U (en) | 2022-09-20 | 2022-09-20 | Ejector rod of fuel nozzle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222491841.XU CN217873084U (en) | 2022-09-20 | 2022-09-20 | Ejector rod of fuel nozzle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217873084U true CN217873084U (en) | 2022-11-22 |
Family
ID=84082601
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222491841.XU Active CN217873084U (en) | 2022-09-20 | 2022-09-20 | Ejector rod of fuel nozzle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217873084U (en) |
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2022
- 2022-09-20 CN CN202222491841.XU patent/CN217873084U/en active Active
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