CN210317570U - Valve rod matching part high-pressure common rail oil injector - Google Patents
Valve rod matching part high-pressure common rail oil injector Download PDFInfo
- Publication number
- CN210317570U CN210317570U CN201920831468.3U CN201920831468U CN210317570U CN 210317570 U CN210317570 U CN 210317570U CN 201920831468 U CN201920831468 U CN 201920831468U CN 210317570 U CN210317570 U CN 210317570U
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- Prior art keywords
- valve rod
- valve
- hole
- sleeve
- pressure
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn - After Issue
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- 238000007789 sealing Methods 0.000 claims abstract description 22
- 238000002347 injection Methods 0.000 claims description 37
- 239000007924 injection Substances 0.000 claims description 37
- 239000000446 fuel Substances 0.000 claims description 12
- 230000008878 coupling Effects 0.000 claims description 11
- 238000010168 coupling process Methods 0.000 claims description 11
- 238000005859 coupling reaction Methods 0.000 claims description 11
- 238000005299 abrasion Methods 0.000 abstract description 2
- 238000012423 maintenance Methods 0.000 abstract description 2
- 230000006835 compression Effects 0.000 abstract 1
- 238000007906 compression Methods 0.000 abstract 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 28
- 229910052742 iron Inorganic materials 0.000 description 14
- 238000010521 absorption reaction Methods 0.000 description 6
- 230000013011 mating Effects 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000010485 coping Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
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- Fuel-Injection Apparatus (AREA)
Abstract
The utility model provides a valve rod matching parts high pressure common rail injector, includes the valve body, the valve rod cover, be equipped with pressure balance hole, valve rod cover seat hole on the valve body, the valve rod cover is installed in valve rod cover seat hole through the cooperation cover, the upper end face contact in shoulder seat and pressure balance hole, the aperture in pressure balance hole is greater than the external diameter of cooperation cover, and the lower extreme and the pressure balance hole of inlet port communicate with each other, the hole and the accurate clearance fit of valve rod matching parts of valve rod cover are equipped with the sealing washer between pressure balance hole and valve rod cover external diameter. The matching clearance between the valve rod and the valve rod sleeve is in an ultra-poor abrasion state, the valve rod sleeve and the valve rod can be directly replaced, and the use and maintenance cost of the oil sprayer can be greatly reduced. The pressure balance hole can eliminate the compression deformation of the inner hole of the valve rod sleeve, so that the fit clearance between the valve rod and the fit hole is increased. A seal ring is provided between the pressure balance hole and the outer diameter of the valve stem sleeve for the purpose of preventing leakage.
Description
The technical field is as follows:
the patent of the utility model relates to an automatically controlled formula sprayer altogether for diesel engine.
Background art:
the structure of the prior art fuel injector assembly is shown in fig. 1 and fig. 2, and the prior art fuel injector assembly comprises a valve body 1, a valve rod 2, a valve rod sleeve 3, a throttle body 4, a sealing ball 5, a magnet holder 6, a magnet rod 7, a solenoid valve part 8, a valve needle pressure spring 91, a double guide sleeve 92, a fuel injection valve needle 93, a fuel injection coupler sleeve 94 and a locking cap 95, wherein a fuel inlet hole 11, an upper outer fuel inlet passage 12, an inclined fuel outlet hole 13, a valve rod matching hole 14, a lower outer fuel inlet passage 15, a pressure relief fuel passage 18 and a lower guide hole 19 are arranged on the valve body 1, and the valve rod 2 is arranged in the valve rod matching hole 14 of the valve body 1 in.
In the high-pressure common rail oil injector, a matching part precise clearance fit structure is arranged between the valve rod 2 and the valve body 1, and when the matching precision between the valve rod 2 and the valve rod matching hole 14 fails due to abrasion, the oil injector is scrapped integrally. Meanwhile, because high-pressure oil is filled between the top end of the valve rod 2 and the valve rod matching hole 14, the aperture of the valve rod matching hole 14 is enlarged and deformed under the action of high pressure of the valve rod matching hole 14 of the valve body 1 during working, so that the matching gap between the valve rod 2 and the valve rod matching hole 14 is increased, the sealing performance of the whole oil sprayer is poor, and the defect of oil spraying pressure reduction is easily caused.
The utility model has the following contents:
the utility model aims at providing a valve rod matching parts high pressure common rail injector, wherein, only valve rod and valve rod cover are the vulnerable part, and the equal used repeatedly of valve body and other parts, simultaneously, for the poor cooperation of non-pressure between valve rod and the valve rod cover, eliminated the vice pressurized deformation of the two cooperation and caused the defect that fit clearance increases to improve the sealing performance of sprayer, oil injection pressure is stable.
The utility model adopts the technical proposal that:
the utility model provides a valve rod matching parts high pressure common rail fuel injector which characterized by: the high-pressure oil injection valve comprises a valve body, a valve rod sleeve, a throttling body, a sealing ball, an iron absorbing seat, an iron absorbing rod, an electromagnetic valve component, a valve needle pressure spring, a double-guide sleeve, an oil injection valve needle, an oil injection coupler sleeve and a locking cap, wherein a high-pressure oil inlet hole, an upper outer oil inlet channel, an inclined oil outlet hole, a lower outer oil inlet channel, a pressure relief oil channel, a lower guide hole, a pressure balance hole and a valve rod sleeve seat hole are formed in the valve body, the valve rod sleeve comprises a shaft shoulder seat, a matching sleeve and an oil inlet hole, the valve rod sleeve is installed in the valve rod sleeve seat hole through the matching sleeve in a clearance fit mode, the shaft shoulder seat is in contact with the upper end face of the pressure balance hole, the aperture of the pressure balance hole is larger than the outer diameter of the matching sleeve, the lower end of the oil inlet hole is communicated with the pressure balance hole, the inner hole of the valve rod sleeve is in precise clearance fit with the valve rod coupler, a sealing, The oil injection valve comprises a sealing ball, an iron absorption seat, an iron absorption rod and an electromagnetic valve component, wherein the iron absorption rod is sleeved in the iron absorption seat, the top surface of the iron absorption rod is pressed by a return spring in the electromagnetic valve component, the bottom surface of a mandril of the iron absorption rod presses the sealing ball, a valve needle pressure spring and a double guide sleeve are sequentially sleeved at the lower section of a valve rod, the valve needle pressure spring is positioned in a lower guide hole, the lower end of the valve needle pressure spring is contacted with the top surface of the double guide sleeve, an oil injection valve needle is sleeved in an oil injection coupling sleeve, and an oil nozzle coupling part consisting of the oil injection valve needle and the oil injection coupling sleeve is screwed.
Furthermore, an elastic ring is arranged on the upper end face of the valve needle pressure spring.
Because this with the direct accurate clearance fit with the valve body of valve rod, it installs on the valve body to change the valve rod into through the valve rod cover, valve rod and valve rod cover are the accurate clearance fit of matching parts, be removable cooperation structure between valve rod cover and the valve body, when the fit clearance between valve rod and the valve rod cover is when the wearing and tearing are out of tolerance, can directly change valve rod cover and valve rod, just can make the sprayer resume the precision, only can report useless valve rod cover and valve rod, if take the repair and match scheme, the valve rod also can be utilized, as long as the hole of coping valve rod cover can, other parts can all be utilized, the use maintenance cost of sprayer has been reduced.
On the other hand, because the pressure balance hole is arranged, the inner hole and the outer diameter of the valve rod sleeve are in the same pressure state, and the problem that the fit clearance between the valve rod and the fit hole is increased due to the fact that the inner hole of the valve rod sleeve is pressed and deformed by high-pressure oil is eliminated. And a sealing ring is arranged between the pressure balance hole and the outer diameter of the valve rod sleeve, so that high-pressure oil is prevented from leaking from the matching section of the outer diameter of the valve rod sleeve and the valve rod sleeve seat hole.
Description of the drawings:
FIG. 1 is a schematic diagram of a prior art fuel injector;
FIG. 2 is a schematic structural view of the valve body of FIG. 1;
FIG. 3 is a schematic structural view of the present invention;
FIG. 4 is a schematic structural view of a valve body;
FIG. 5 is a schematic view of a stem sleeve construction;
in the figure: 1-a valve body; 2-a valve stem; 3-valve stem sleeve; 4-a throttle body; 5-sealing ball; 6-magnet holder; 7-a sucker rod; 8-an electromagnetic valve component; 91-valve needle pressure spring; 92-double guide sleeve; 93-oil injection valve needle; 94-oil injection coupling set; 95-a locking cap; 96-elastic ring; 11-high pressure oil inlet hole; 12-upper external oil inlet channel; 13-oblique oil outlet holes; 14-valve stem mating holes; 15-lower external oil inlet channel; 16-a pressure relief oil passage; 17-lower guide holes; 18-a pressure balancing hole; 19-a stem sleeve seat hole; 31-shaft shoulder seat; 32-a mating sleeve; 33-oil inlet hole; 34-sealing ring.
The specific implementation mode is as follows:
the following description of the embodiments of the present invention will be made with reference to the accompanying drawings:
a valve rod matching high-pressure common rail oil injector is shown in figures 3-5 and comprises a valve body 1, a valve rod 2, a valve rod sleeve 3, a throttle body 4, a sealing ball 5, a magnet seat 6, a magnet rod 7, an electromagnetic valve part 8, a valve needle pressure spring 91, a double guide sleeve 92, an oil injection valve needle 93, an oil injection matching member sleeve 94 and a locking cap 95, wherein the valve body 1 is provided with a high-pressure oil inlet hole 11, an upper outer oil inlet channel 12, an inclined oil outlet hole 13, a lower outer oil inlet channel 15, a pressure relief oil channel 16, a lower guide hole 17, a pressure balance hole 18 and a valve rod sleeve seat hole 19, the valve rod sleeve 3 comprises a shaft shoulder seat 31, a matching sleeve 32 and an oil inlet hole 33, the valve rod sleeve 3 is arranged in the valve rod sleeve seat hole 19 through the matching sleeve 32, clearance fit is formed between the shaft shoulder seat 31 and the lower guide hole 17, the pressure balance hole 18 is in contact with the upper end face of the pressure balance hole 18, the aperture of the pressure balance hole 18 is larger than the outer diameter of, the inner hole of the valve rod sleeve 3 is matched with the valve rod 2 in a matching precision clearance way, a sealing ring 34 is arranged between the pressure balance hole 18 and the outer diameter of the valve rod sleeve 3, the upper end surface of the valve rod sleeve 3 is sequentially provided with a throttling body 4, a sealing ball 5, an iron attracting seat 6, an iron attracting rod 7 and an electromagnetic valve part 8, the iron attracting rod 7 is sleeved in the iron attracting seat 6, the top surface of the iron-sucking rod 7 is pressed by a return spring 81 in the electromagnetic valve component 8, the bottom surface of the ejector rod of the iron-sucking rod 7 presses the sealing ball 5, an elastic ring 96, a valve needle pressure spring 91 and a double guide sleeve 92 are sequentially sleeved on the lower section of the valve rod 2, the elastic ring 96 and the valve needle pressure spring 91 are positioned in a lower guide hole 17, the lower end of the valve needle pressure spring 91 is contacted with the top surface of the double guide sleeve 92, the oil injection valve needle 93 is sleeved in the oil injection coupling sleeve 94, the nozzle matching parts composed of the oil injection needle 93 and the oil injection matching part sleeve 94 are screwed on the lower end of the valve body 1 through a locking cap 95.
The principle of the work is as follows:
when the electromagnetic valve part 8 is in power loss, the return spring 81 presses the sealing ball 5 through the iron absorbing rod 7, so that the sealing ball 5 closes the pressure relief hole on the top surface of the throttle body 4, at the moment, high-pressure oil enters the pressure balance hole 18 of the valve rod 2 from the high-pressure oil inlet hole 11, the upper outer oil inlet channel 12 and the inclined oil outlet hole 13, and simultaneously enters an oil injection high-pressure cavity surrounded by the oil injection valve needle 93 and the oil injection coupling sleeve 94 through the lower outer oil inlet channel 15 to act on the oil injection valve needle 93, and as the upper section diameter of the valve rod 2 is larger than that of the oil injection valve needle 93, the valve rod 2 presses the oil injection valve needle 93 downwards, so that the oil injector is; when the electromagnetic valve component 8 is electrified, the iron attracting rod 7 moves upwards against the elastic force of the return spring 81, the sealing ball 5 is jacked open by high-pressure oil entering from a pressure relief hole on the top surface of the throttle body 4, at the moment, the high-pressure oil enters a top high-pressure cavity of the valve rod 2 from the oil inlet hole 11, the upper outer oil inlet channel 12 and the inclined oil outlet hole 13, the pressure relief hole on the top surface of the throttle body 4 is communicated with the pressure relief oil channel 17 and is discharged from the pressure relief hole in a pressure relief mode, the high-pressure oil from the lower outer oil inlet channel 15 enters an oil injection high-pressure cavity surrounded by the oil injection valve needle 93 and the oil injection coupling sleeve 94 and acts on the oil injection valve needle 93, and as the top of the valve rod 2 is in the pressure relief state, the oil injection valve needle 93 and the valve rod 2 move. After high-pressure oil is introduced into the oil injector with the structure, because the upper sections of the shaft shoulder seat 31 and the matching sleeve 32 of the valve rod sleeve 3 are in the same pressure environment state, the problem that the matching clearance between the valve rod 2 and the matching hole is increased due to the increase of the pressure deformation of the high-pressure oil to the matching hole of the valve rod in the prior art is eliminated. A seal ring 34 is provided between the pressure balance hole 18 and the outer diameter of the stem sleeve 3 for the purpose of preventing high-pressure oil from leaking from the mating section of the outer diameter of the stem sleeve 3 and the stem sleeve seat hole 19.
The utility model discloses an embodiment is many, does not list one by one here, as long as take valve rod 2 and 3 matching parts of valve rod cover, and make all technical scheme that the valve rod matching parts worked under being in isobaric environment all be the utility model discloses wait that the function replaces the scheme, all belong to the utility model discloses a protection scope.
Claims (2)
1. The utility model provides a valve rod matching parts high pressure common rail fuel injector which characterized by: the high-pressure oil injection valve comprises a valve body (1), a valve rod (2), a valve rod sleeve (3), a throttling body (4), a sealing ball (5), an iron-absorbing seat (6), an iron-absorbing rod (7), an electromagnetic valve component (8), a valve needle pressure spring (91), a double-guide sleeve (92), an oil injection valve needle (93), an oil injection coupling sleeve (94) and a locking cap (95), wherein a high-pressure oil inlet hole (11), an upper outer oil inlet channel (12), an inclined oil outlet hole (13), a lower outer oil inlet channel (15), a pressure relief oil channel (16), a lower guide hole (17), a pressure balance hole (18) and a valve rod sleeve seat hole (19) are formed in the valve body (1), the valve rod sleeve (3) comprises a shaft shoulder seat (31), a matching sleeve (32) and an oil inlet hole (33), the valve rod sleeve (3) is installed in the valve rod sleeve seat hole (19) through the matching sleeve (32), clearance fit is formed between the shaft shoulder seat (31) and the upper end face of the pressure balance hole, the aperture of the pressure balance hole (18) is larger than the outer diameter of the matching sleeve (32), the lower end of the oil inlet hole (33) is communicated with the pressure balance hole (18), the inner hole of the valve rod sleeve (3) is matched with the valve rod (2) in a matching precision clearance manner, a sealing ring (34) is arranged between the pressure balance hole (18) and the outer diameter of the valve rod sleeve (3), a throttling body (4), a sealing ball (5), an iron-attracting seat (6), an iron-attracting rod (7) and an electromagnetic valve component (8) are sequentially arranged on the upper end surface of the valve rod sleeve (3), the iron-attracting rod (7) is sleeved in the iron-attracting seat (6), the top surface of the iron-attracting rod (7) is pressed by a reset spring (81) in the electromagnetic valve component (8), the bottom surface of a mandril of the iron-attracting rod (7) presses the sealing ball (5), a pressure spring valve needle (91) and a double-guide valve rod sleeve (92) are sequentially sleeved at the lower section of the valve needle (2), and a, the lower end of the valve needle pressure spring (91) is contacted with the top surface of the double guide sleeve (92), the oil injection valve needle (93) is sleeved in the oil injection coupling sleeve (94), and an oil nozzle coupling part formed by the oil injection valve needle (93) and the oil injection coupling sleeve (94) is screwed and fixed at the lower end of the valve body (1) through a locking cap (95).
2. The valve stem coupled high-pressure common rail injector as claimed in claim 1, wherein: an elastic ring (96) is arranged on the upper end surface of the valve needle pressure spring (91).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920831468.3U CN210317570U (en) | 2019-06-03 | 2019-06-03 | Valve rod matching part high-pressure common rail oil injector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920831468.3U CN210317570U (en) | 2019-06-03 | 2019-06-03 | Valve rod matching part high-pressure common rail oil injector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210317570U true CN210317570U (en) | 2020-04-14 |
Family
ID=70141785
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920831468.3U Withdrawn - After Issue CN210317570U (en) | 2019-06-03 | 2019-06-03 | Valve rod matching part high-pressure common rail oil injector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210317570U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110131084A (en) * | 2019-06-03 | 2019-08-16 | 无锡格林鲍尔科技有限公司 | A kind of valve rod couple high pressure common rail injector |
-
2019
- 2019-06-03 CN CN201920831468.3U patent/CN210317570U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110131084A (en) * | 2019-06-03 | 2019-08-16 | 无锡格林鲍尔科技有限公司 | A kind of valve rod couple high pressure common rail injector |
| CN110131084B (en) * | 2019-06-03 | 2024-05-28 | 无锡格林鲍尔科技有限公司 | Valve rod coupling type high-pressure common rail fuel injector |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20200414 Effective date of abandoning: 20240528 |
|
| AV01 | Patent right actively abandoned |
Granted publication date: 20200414 Effective date of abandoning: 20240528 |
|
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |