CN112682234A - Thread type fuel injection valve and static flow adjusting method - Google Patents
Thread type fuel injection valve and static flow adjusting method Download PDFInfo
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- CN112682234A CN112682234A CN202011627615.9A CN202011627615A CN112682234A CN 112682234 A CN112682234 A CN 112682234A CN 202011627615 A CN202011627615 A CN 202011627615A CN 112682234 A CN112682234 A CN 112682234A
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Abstract
The invention relates to the technical field of electromagnetic valves, and particularly discloses a threaded oil injection valve and a static flow adjusting method, wherein the threaded oil injection valve comprises a valve core, a connecting body, a magnetism isolating sleeve fixedly connected to the lower end of the connecting body, a valve sleeve fixedly connected to the lower end of the magnetism isolating sleeve and a valve nozzle fixed to the lower end of the valve sleeve; the valve nozzle is provided with an oil injection hole; a compression spring for driving the valve core to downwards block the oil injection hole is arranged in the connecting body, and a magnetic assembly for driving the valve core to upwards move is arranged outside the connecting body; the inner side of the lower end of the valve sleeve is provided with an internal thread, and the outer side of the oil nozzle is provided with an external thread which is connected with the internal thread in a threaded manner. The invention provides a threaded fuel injection valve and a static flow adjusting method, which can conveniently adjust the relative position between a valve sleeve and a valve nozzle.
Description
Technical Field
The invention relates to the technical field of electromagnetic valves, in particular to a threaded oil injection valve and a static flow adjusting method.
Background
Referring to fig. 1, in general, an injection valve includes a valve core 1, a connecting body 2, a magnetism isolating sleeve 3 fixedly connected to a lower end of the connecting body 2, a valve sleeve 4 fixedly connected to a lower end of the magnetism isolating sleeve 3, and a valve nozzle 5 fixed to a lower end of the valve sleeve 4.
The valve nozzle 5 is provided with an oil injection hole 501; the connecting body 2 is internally provided with a fixedly arranged spring pin 6 and a compression spring 7 for driving the valve core 1 to block the oil injection hole 501 downwards, and the connecting body 2 is externally provided with a magnetic assembly 8 for driving the valve core 1 to move upwards.
The valve core 1 comprises a head 101 positioned in the magnetism isolating sleeve 3 and slidably connected with the magnetism isolating sleeve 3, a connecting rod 102 positioned in the valve sleeve 4 and a ball 103 for plugging an oil injection hole 501 of the valve nozzle 5.
Under the normal condition, the compression spring 7 drives the valve core 1 to move downwards, so that the ball 103 blocks the oil injection hole 501; when oil is required to be sprayed, power is supplied to the magnetic assembly 8, the valve core 1 moves upwards under the action of the magnetic field and overcomes the elastic force of the compression spring 7, the oil spray hole 501 is opened, and fuel oil can be sprayed out through the oil spray hole 501.
It can be understood that the valve nozzle 5 is used as a lower limiting part of the valve core 1, and the deformation amount of the compression spring 7 can be changed by adjusting the upper position and the lower position of the valve nozzle 5, so that the static flow of the oil injection valve is changed. For example, if the position of the valve mouth 5 is adjusted upward, the amount of deformation of the compression spring 7 increases, the magnetic force required to open the valve element 1 increases, and finally the valve closing speed increases and the valve opening speed decreases; conversely, when the position of the valve mouth 5 is adjusted upward, the amount of deformation of the compression spring 7 decreases, the magnetic force required to open the valve element 1 decreases, and eventually, the valve closing speed decreases and the valve opening speed increases.
In order to ensure that the dynamic flow of the fuel injector is kept unchanged after the fuel injector leaves a factory, generally, the valve nozzle 5 and the valve sleeve 4 are connected in an interference fit manner in a press-fitting manner.
Specifically, the current static flow adjustment steps are as follows:
firstly, assembling other parts except the valve mouth 5;
secondly, the valve mouth 5 is placed under the valve sleeve 4;
thirdly, slightly pushing the valve mouth 5 upwards by using the adjusting device 10, then measuring whether the position of the valve mouth 5 meets the requirement, if so, stopping adjusting, and stamping the valve sleeve 4 from the outer side by using a press-fitting machine, so that the valve sleeve 4 is stably connected with the valve mouth 5; if not, the adjusting device 10 is used to continue to advance the valve mouth 5 slightly upwards until the position of the valve mouth 5 meets the requirement.
Such an adjustment method has the following problems: in order to ensure that the valve nozzle 5 cannot easily generate relative displacement with the valve sleeve 4 before the valve sleeve 4 is stamped, an interference fit structure is formed between the valve nozzle 5 and the valve sleeve 4, the adjusting device 10 can only support the valve nozzle 5 from bottom to top and cannot enable the valve nozzle 5 to move downwards, and therefore, if the valve nozzle 5 is excessively adjusted upwards, the adjustment cannot be carried out, the production difficulty is greatly increased, and the production speed is reduced.
Disclosure of Invention
It is an object of the present invention to provide a threaded fuel injection valve and a static flow rate adjustment method, which can conveniently adjust the relative position between a valve housing and a valve nozzle.
In order to achieve the above objects, in one aspect, the present invention provides a threaded injection valve, including a valve core, a connecting body, a magnetism isolating sleeve fixedly connected to a lower end of the connecting body, a valve sleeve fixedly connected to a lower end of the magnetism isolating sleeve, and a valve nozzle fixed to a lower end of the valve sleeve; the valve nozzle is provided with an oil injection hole; a compression spring for driving the valve core to downwards block the oil injection hole is arranged in the connecting body, and a magnetic assembly for driving the valve core to upwards move is arranged outside the connecting body;
the inner side of the lower end of the valve sleeve is provided with an internal thread, and the outer side of the oil nozzle is provided with an external thread which is connected with the internal thread in a threaded manner.
Optionally, the valve nozzle is connected with the valve sleeve in a welding manner.
Optionally, the magnetic assembly includes a coil sleeved outside the magnetism isolating sleeve, a magnetic sleeve sleeved outside the coil, and a magnetic cover plate located above the magnetic sleeve.
Optionally, the coil is coated with an encapsulating layer.
Optionally, an annular boss is arranged on the outer side of the head of the valve core, and the annular boss is connected with the inner wall of the magnetism isolating sleeve in a sliding manner.
Optionally, the annular boss is manufactured by an outer circular mold process, and the inner wall of the magnetism isolating sleeve is manufactured by an inner circular mold process.
Optionally, a sealing ring is arranged between the valve nozzle and the valve sleeve.
In another aspect, a static flow adjusting method is provided, which is applicable to any of the above threaded injection valves, and includes:
putting the valve nozzle into the valve sleeve to enable the valve nozzle to be in threaded connection with the valve sleeve;
adjusting equipment drives the valve nozzle to rotate forwards or reversely relative to the valve sleeve, and simultaneously, the displacement of the valve nozzle is detected;
and when the valve nozzle reaches the preset position, performing laser spot welding on the valve nozzle and the valve sleeve.
The invention has the beneficial effects that: a valve sleeve and a valve nozzle are in threaded connection, when the static flow is adjusted, if the position of the valve nozzle needs to be adjusted upwards, the valve nozzle is enabled to rotate in the positive direction relative to the valve sleeve, and if the position of the valve nozzle needs to be adjusted downwards, the valve nozzle is enabled to rotate in the reverse direction relative to the valve sleeve. After the position adjustment is completed, the valve nozzle is fixedly connected with the valve sleeve, and the structure mode can conveniently adjust the relative position between the valve sleeve and the valve nozzle, thereby being beneficial to reducing the production difficulty and improving the production efficiency.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive exercise.
FIG. 1 is a schematic diagram of a prior art fuel injection valve provided in the background of the invention;
FIG. 2 is a schematic structural diagram of a threaded fuel injection valve according to an embodiment;
FIG. 3 is a schematic structural view of an annular boss of the threaded injection valve provided by the embodiment;
fig. 4 is a flowchart of a static traffic adjustment method according to an embodiment.
In the figure:
1. a valve core; 101. a head portion; 1011. an annular boss; 102. a connecting rod; 103. a sphere;
2. connecting;
3. a magnetic isolation sleeve;
4. a valve housing;
5. a valve nozzle; 501. an oil spray hole; 502. a limiting boss;
6. a spring pin;
7. a compression spring;
8. a magnetic component; 801. a coil; 802. a magnetic sleeve; 803. a magnetic cover plate; 804. wrapping an adhesive layer;
9. a seal ring;
10. adjusting equipment;
11. a displacement sensor;
12. laser spot welding machine.
Detailed Description
In order to make the objects, features and advantages of the present invention more obvious and understandable, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the embodiments described below are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it is to be understood that when an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. When a component is referred to as being "disposed on" another component, it can be directly on the other component or intervening components may also be present.
Furthermore, the terms "long", "short", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of describing the present invention, but do not indicate or imply that the referred devices or elements must have the specific orientations, be configured to operate in the specific orientations, and thus are not to be construed as limitations of the present invention.
The technical scheme of the invention is further explained by the specific implementation mode in combination with the attached drawings.
Example one
Referring to fig. 2 and 3, the embodiment provides a threaded injection valve, which includes a valve core 1, a connecting body 2, a magnetism isolating sleeve 3 fixedly connected to a lower end of the connecting body 2, a valve sleeve 4 fixedly connected to a lower end of the magnetism isolating sleeve 3, and a valve nozzle 5 fixed to a lower end of the valve sleeve 4; the valve nozzle 5 is provided with an oil injection hole 501; the connecting body 2 is internally provided with a fixedly arranged spring pin 6 and a compression spring 7 for driving the valve core 1 to downwards block the oil injection hole 501, and the connecting body 2 is externally provided with a magnetic assembly 8 for driving the valve core 1 to upwards move.
The valve core 1 comprises a head 101 positioned in the magnetism isolating sleeve 3 and slidably connected with the magnetism isolating sleeve 3, a connecting rod 102 positioned in the valve sleeve 4 and a ball 103 for plugging an oil injection hole 501 of the valve nozzle 5.
The inner side of the lower end of the valve sleeve 4 is provided with an internal thread, and the outer side of the oil nozzle is provided with an external thread which is connected with the internal thread in a threaded manner.
It should be noted that, in the threaded injection valve provided in this embodiment, before the assembly of the valve nozzle 5 and the valve sleeve 4 is performed, the valve nozzle 5 and the valve sleeve 4 are in threaded connection, so as to adjust the relative position of the valve nozzle 5 and the valve sleeve 4, and after the position is determined, the valve nozzle 5 is fixedly connected with the valve sleeve 4.
As an alternative fastening method, the valve mouth 5 and the valve housing 4 are connected by welding or by press fitting in an interference fit manner.
In the threaded injection valve provided in this embodiment, the valve housing 4 is in threaded connection with the valve nozzle 5, and when static flow adjustment is performed, if the position of the valve nozzle 5 needs to be adjusted upward, the valve nozzle 5 is rotated forward relative to the valve housing 4, and if the position of the valve nozzle 5 needs to be adjusted downward, the valve nozzle 5 is rotated backward relative to the valve housing 4. After the position adjustment is completed, the valve mouth 5 is fixedly connected with the valve sleeve 4, and the relative position between the valve sleeve 4 and the valve mouth 5 can be conveniently adjusted by the structural mode, so that the production difficulty is reduced, and the production efficiency is improved.
Optionally, the magnetic assembly 8 includes a coil 801 sleeved outside the magnetic isolation sleeve 3, a magnetic sleeve 802 sleeved outside the coil 801, and a magnetic cover plate 803 located above the magnetic sleeve 802. Further, the outside of the coil 801 is wrapped with an encapsulating layer 804 for fixing the coil 801. It can be understood that the magnetic component 8 adopts a split structural design to form a completely new electromagnetic loop, has small electromagnetic loss, is convenient to assemble and disassemble, and can well realize modular engineering production.
In this embodiment, referring to fig. 3, an annular boss 1011 is disposed on an outer side of the head 101 of the valve core 1, and the annular boss 1011 is slidably connected to an inner wall of the magnetic shield 3.
It can be understood that, only by the sliding connection between the annular boss 1011 and the magnetism isolating sleeve 3, the contact area between the head 101 of the valve core 1 and the magnetism isolating sleeve 3 can be effectively reduced, thereby reducing the sliding friction resistance and improving the sliding smoothness of the valve core 1.
Further, the annular boss 1011 is manufactured by an outer circular mold process, and the inner wall of the magnetism isolating sleeve 3 is manufactured by an inner circular mold process.
It should be pointed out that, use outer circle mould technology to carry out surface treatment to annular boss 1011 and use inner circle mould technology to handle magnetic isolation sleeve 3 inner wall, can effectively reduce the surface roughness of annular boss 1011, reduce the sliding friction resistance between case 1 and magnetic isolation sleeve 3, improve the gliding smooth and easy degree of case 1.
Optionally, a sealing ring 9 is disposed between the valve nozzle 5 and the valve sleeve 4.
Specifically, the sealing ring 9 can further improve the sealing performance between the valve sleeve 4 and the valve nozzle 5, and reduce the occurrence of oil leakage.
The threaded fuel injection valve provided by the embodiment has the following advantages:
the coil 801, the magnetic sleeve 802 and the magnetic cover plate 803 are mutually independent and form a completely new electromagnetic loop, so that the electromagnetic loss is small, the response speed of the valve element 1 is high, and the modularized production is facilitated;
secondly, the valve mouth 5 is in threaded connection with the valve sleeve 4 before being fixedly connected, so that the static flow regulation difficulty is reduced, and the production efficiency is improved.
Example two
Referring to fig. 2 to 4, the present embodiment provides a static flow adjusting method, which is suitable for the threaded fuel injection valve provided in the first embodiment, and has the same functions and advantages.
Specifically, referring to fig. 4, the static flow rate adjustment method includes the following steps:
s10: the threaded injection valve is assembled with the exception of the valve nozzle 5.
Specifically, the spring pin 6, the compression spring 7, the connecting body 2, the magnetism isolating sleeve 3, the valve sleeve 4, the magnetic component 8 and the like are installed.
S20: the valve mouth 5 is placed into the valve housing 4, and the valve mouth 5 is screwed into the valve housing 4.
At the beginning, the valve mouth 5 and the valve sleeve 4 are not in interference fit, so that the valve mouth 5 and the valve sleeve 4 can be easily rotated relatively.
S30: the adjustment device 10 drives the valve mouth 5 to rotate in the forward or reverse direction relative to the valve housing 4, and simultaneously detects the displacement of the valve mouth 5 by the displacement sensor 11.
Optionally, the adjusting device 10 is a motor; the displacement sensor 11 is a high-precision miniature differential inductance type displacement sensor 11.
The upper end of the valve nozzle 5 is inserted into the valve sleeve 4, and the lower end of the valve nozzle is exposed, so that the adjusting device 10 is fixedly connected with the valve nozzle 5 through a jig, and the valve nozzle 5 is driven to rotate. Further, a limiting boss 502 is arranged in the middle of the valve nozzle 5, and the limiting boss 502 is located below the sealing ring 9, so that the sealing ring 9 is compressed, and the whole valve nozzle 5 is prevented from entering the valve sleeve 4.
Specifically, detecting the displacement of the valve nozzle 5 belongs to the prior art, which is not the focus of this embodiment, and therefore, the detailed description thereof is omitted.
S40: when the valve nozzle 5 reaches the preset position, the valve nozzle 5 and the valve housing 4 are laser spot-welded using the laser spot welding machine 12.
The laser spot welding is only pre-fixed, the adjusting device 10 is removed after the pre-fixing, and then the valve nozzle 5 and the valve sleeve 4 are further fixed by adopting the modes of welding or press fitting and the like.
The above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (8)
1. A thread type oil injection valve comprises a valve core, a connecting body, a magnetism isolating sleeve fixedly connected to the lower end of the connecting body, a valve sleeve fixedly connected to the lower end of the magnetism isolating sleeve, and a valve nozzle fixed to the lower end of the valve sleeve; the valve nozzle is provided with an oil injection hole; a compression spring for driving the valve core to downwards block the oil injection hole is arranged in the connecting body, and a magnetic assembly for driving the valve core to upwards move is arranged outside the connecting body; it is characterized in that the preparation method is characterized in that,
the inner side of the lower end of the valve sleeve is provided with an internal thread, and the outer side of the oil nozzle is provided with an external thread which is connected with the internal thread in a threaded manner.
2. The threaded injection valve of claim 1 wherein the valve nozzle is welded to the valve housing.
3. The threaded injection valve of claim 1, wherein the magnetic assembly comprises a coil disposed outside the magnetic shield sleeve, a magnetic sleeve disposed outside the coil, and a magnetic cover plate disposed above the magnetic sleeve.
4. The threaded injection valve of claim 3 wherein the outside of the coil is coated with an encapsulating layer.
5. The threaded injection valve of claim 1, wherein an annular boss is provided on the outside of the head of the spool, and the annular boss is slidably connected to the inner wall of the magnetic spacer.
6. The threaded fuel injection valve of claim 5 wherein the annular boss is formed by an outer circular molding process and the inner wall of the spacer sleeve is formed by an inner circular molding process.
7. The threaded injection valve of claim 1 wherein a seal is disposed between the valve nozzle and the valve housing.
8. A static flow rate adjusting method applied to the threaded injection valve of any one of claims 1 to 7, comprising:
putting the valve nozzle into the valve sleeve to enable the valve nozzle to be in threaded connection with the valve sleeve;
adjusting equipment drives the valve nozzle to rotate forwards or reversely relative to the valve sleeve, and simultaneously, the displacement of the valve nozzle is detected;
and when the valve nozzle reaches the preset position, performing laser spot welding on the valve nozzle and the valve sleeve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011627615.9A CN112682234A (en) | 2020-12-30 | 2020-12-30 | Thread type fuel injection valve and static flow adjusting method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011627615.9A CN112682234A (en) | 2020-12-30 | 2020-12-30 | Thread type fuel injection valve and static flow adjusting method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112682234A true CN112682234A (en) | 2021-04-20 |
Family
ID=75455858
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011627615.9A Pending CN112682234A (en) | 2020-12-30 | 2020-12-30 | Thread type fuel injection valve and static flow adjusting method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112682234A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101301779A (en) * | 2007-05-09 | 2008-11-12 | 标准模具（2007）有限公司 | Injection molding nozzle with valve pin alignment |
| CN101354142A (en) * | 2007-07-27 | 2009-01-28 | 通用电气公司 | Fuel nozzle component and method |
| CN202746074U (en) * | 2012-07-11 | 2013-02-20 | 江门市威宇系统技术有限公司 | Electric-control gasoline injector |
| CN214118365U (en) * | 2020-12-30 | 2021-09-03 | 东莞市盈森汽车电喷科技有限公司 | Thread type oil injection valve |
-
2020
- 2020-12-30 CN CN202011627615.9A patent/CN112682234A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101301779A (en) * | 2007-05-09 | 2008-11-12 | 标准模具（2007）有限公司 | Injection molding nozzle with valve pin alignment |
| CN101354142A (en) * | 2007-07-27 | 2009-01-28 | 通用电气公司 | Fuel nozzle component and method |
| CN202746074U (en) * | 2012-07-11 | 2013-02-20 | 江门市威宇系统技术有限公司 | Electric-control gasoline injector |
| CN214118365U (en) * | 2020-12-30 | 2021-09-03 | 东莞市盈森汽车电喷科技有限公司 | Thread type oil injection valve |
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