CN209781111U - Oil injector control valve - Google Patents
Oil injector control valve Download PDFInfo
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- CN209781111U CN209781111U CN201920333030.2U CN201920333030U CN209781111U CN 209781111 U CN209781111 U CN 209781111U CN 201920333030 U CN201920333030 U CN 201920333030U CN 209781111 U CN209781111 U CN 209781111U
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- armature
- control valve
- damping
- orifice plate
- circular ring
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Abstract
The utility model belongs to the technical field of internal combustion engines, in particular to a high-pressure common rail fuel system, and particularly relates to a fuel injector control valve; the damping device comprises a throttling orifice plate, a control valve seat, an armature, a valve core, a pre-tightening spring and an electromagnet assembly, wherein the control valve seat compresses the throttling orifice plate, a circular ring sealing boss is arranged on the lower end face of the armature, the circular ring sealing boss on the lower end face of the armature is matched with the upper end face of the throttling orifice plate for sealing, the damping device also comprises a damping pad, a circular ring step part is circumferentially arranged at the upper end of the throttling orifice plate, the damping pad is sleeved on the circular ring step part of the throttling orifice plate, a plurality of n-shaped grooves are arranged on the upper surface of the damping pad, the grooves are communicated with the inner part and the outer part of; the problem of current control valve rigid impact when closing the in-process sealed, increase mechanical damping and hydraulic damping influence, the damping oscillation reduces dynamic impact, increases control valve subassembly's life to the life of extension sprayer.
Description
Technical Field
The utility model belongs to the technical field of the especially high pressure common rail fuel system of internal-combustion engine, concretely relates to sprayer control valve.
Background
The control valve is an important part on the oil sprayer, can accurately control the opening of the oil sprayer, is a key influence factor for accurately controlling the oil sprayer, and has the advantages that the requirement on the injection pressure of the existing oil sprayer is continuously improved, and meanwhile, the control valve is frequent in movement, frequent in impact and large in dynamic impact stress.
in patent document DE102006050033a1, there is no damping when the armature rod is seated, and the dynamic impact force is large;
In EP1923564a2, the seal rod has no damping action when seated, has no cushion during the sealing process, and directly acts on the seat surface, resulting in large dynamic impact;
In WO2008055724a1, the armature rod shown in fig. 2 has an annular gap between its lower end face and its seat face, which has a throttling action and a hydrodynamic damping action when seated, and which enables the armature rod to exert a cushioning action when seated, but the hydrodynamic damping has a limited cushioning action on the seating, so that dynamic impact stress is limited and wear between the armature rod and the seat face cannot be reduced well;
in patent document WO2010009925a1, a hydraulic damping conical groove (circle marked part in the figure) is arranged at the shoulder blade part at the upper end of the split armature and the armature rod in the document fig. 2, and hydraulic damping can also play a role in buffering, however, dynamic impact stress is limited, collision abrasion between the armature rod and a sealing seat surface of the armature rod cannot be reduced, the hydraulic damping effect in the prior art is limited, impact stress cannot be effectively buffered, abrasion is severe due to long-time use, the reliability of the fuel injector is reduced, and the service life of the fuel injector is influenced.
The damping pad in patent document CN106894926B produces the damping oil duct and is short, and the damping effect is limited, and the arc oil duct is difficult to make, and the cost is higher to the sharp limit of arc oil duct is thin, under the high pressure fluid condition, and broken risk is high.
Disclosure of Invention
The utility model aims to overcome the defects in the prior art, and provides a fuel injector control valve, which solves the problems of rigid impact when the control valve of the existing fuel injector is sealed in the closing process, increases the influence of mechanical damping and hydraulic damping, attenuates oscillation, ensures more accurate control, reduces dynamic impact stress, greatly prolongs the service life of a control valve component and further prolongs the service life of the fuel injector; just the utility model discloses well damping oil duct extension dozen times to have alternately the blind groove that link up, the damping influences the stack, and the effect is showing, and manufacturing cost is lower, and the oil duct can not have broken risk under the effect of high pressure fluid, has very big improvement in the aspect of the reliability.
A fuel injector control valve comprises a fuel injector body 1, a throttle orifice plate 2, a control valve seat 3, an armature 4, a valve core 5, a pre-tightening spring 7 and an electromagnet assembly 9, wherein the control valve seat 3 is in threaded connection with the fuel injector body 1, the throttle orifice plate 2 is fixed between the control valve seat 3 and the fuel injector body 1, the upper end of the throttle orifice plate 2 is provided with a boss 2a, the boss 2a is provided with an annular step part, a damping pad 21 is sleeved on the annular step part and is in interference fit connection with the annular step part, the lower end face of the armature 4 is provided with an annular sealing boss 4a, the armature 4 is positioned above the throttle orifice plate 2, the annular sealing boss 4a and the boss 2a are in plane sealing, the middle parts of the armature 4 and the electromagnet assembly 9 are respectively provided with a central hole, the rod part of the valve core 5 sequentially penetrates through the central holes of the electromagnet assembly 9 and the armature 4, and the, step part 51 that 5 pole portions of case upper end set up is blocked at the top in the mesopore of electromagnet assembly 9, and pretension spring 7 cover is put at the pole portion of the interior case 5 of the mesopore of electromagnet assembly 9, and pretension spring 7 upper end top is on step part 51, and the lower extreme is located armature 4 top, and has placed adjusting shim 6 on the case 5 pole portion of pretension spring 7 between armature 4 for adjusting the pretension of armature 4, the part of armature 4 lower extreme non-circular seal boss 4a compresses tightly damping pad 21 laminating, damping pad 21 on evenly be equipped with a plurality of nearly font slots 211, the inside wall and the lateral wall of damping pad 21 are located respectively to the entry and the export of nearly font slot 211, make nearly font slot 211 communicate the inside and outside two parts of damping pad 21.
The annular sealing boss 4a arranged on the lower end face of the armature iron 4 and the annular step part arranged on the upper end of the boss 2a are subjected to plane sealing under the action of the pressing force of the pre-tightening spring 7 on the armature iron 4.
The zigzag groove 211 is provided with a blind groove 212 penetrating through the zigzag groove 211, and the blind groove 212 is intersected with the zigzag groove 211.
The damping pad 21 is provided with a support member for adjusting the assembling compression amount of the damping pad 21.
The damping pad 21 is made of an elastic material.
the utility model has the advantages that:
the utility model has the advantages of reasonable design, the rigidity striking of the control valve of solving current sprayer when closing the in-process and sealing, the damping pad assembly is simple, the fluid runner of extension damping pad, long fluid runner and blind end runner stack dual effect, further increase the resistance of fluid flow in-process, make the hydraulic pressure power of damping pad oil duct increase, thereby strengthen hydraulic damping, in addition damping pad self elastic mechanical damping, multiple damping effect stack, better reduce dynamic impact stress, the ringing, increase control valve subassembly's life, thereby improve the life of sprayer, promote the reliability of sprayer, reduce the use cost of product simultaneously.
Drawings
fig. 1 is a schematic structural diagram of embodiment 1 of the present invention.
Fig. 2 is an enlarged schematic view of section iii in fig. 1.
Fig. 3 is a schematic structural view of a damping pad in embodiment 1 of the present invention.
Fig. 4 is a schematic structural diagram in embodiment 2 of the present invention.
fig. 5 is an enlarged schematic view of a part of the structure in embodiment 2 of the present invention.
fig. 6 is a schematic structural view of a damping pad in embodiment 2 of the present invention.
Fig. 7 is a schematic structural view of embodiment 3 of the present invention.
Wherein: 1-an oil injector body, 2-a throttling orifice plate, 2a boss, 21-a damping pad, 211-a zigzag groove, 212-a blind groove, 22-a damping pad adjusting gasket, 23-a retaining ring, 3-a control valve seat, 31-a guide part, 4-an armature, 4a circular ring sealing boss, 41-an armature plate, 42-an armature rod, 5-a valve core, 51-a step part, 6-an adjusting gasket, 7-a pre-tightening spring, 8-an electromagnet tightening cap, 9-an electromagnet assembly, 10-a stroke adjusting ring and 11-a return spring.
Detailed Description
The invention is further described with reference to the following specific drawings and examples.
Example 1
As shown in figure 1, the fuel injector control valve comprises a fuel injector body 1, a throttle orifice plate 2, a control valve seat 3, an armature 4, a valve core 5, a pre-tightening spring 7 and an electromagnet assembly 9, wherein the control valve seat 3 is in threaded connection with the fuel injector body 1, the throttle orifice plate 2 is fixed between the control valve seat 3 and the fuel injector body 1, the upper end of the throttle orifice plate 2 is provided with a boss 2a, the boss 2a is provided with an annular step part, a damping pad 21 is sleeved on the annular step part and is in interference fit connection with the annular step part, the lower end face of the armature 4 is provided with an annular sealing boss 4a, the armature 4 is positioned above the throttle orifice plate 2, the annular sealing boss 4a is in plane sealing with the boss 2a, the middle parts of the armature 4 and the electromagnet assembly 9 are respectively provided with a central hole, the rod part of the valve core 5 sequentially penetrates through the electromagnet assembly 9 and the central hole of the armature 4, a step part 51 arranged at the upper end of the rod part of the valve core 5 is clamped at the top of a central hole in the electromagnet assembly 9, a pre-tightening spring 7 is sleeved at the rod part of the valve core 5 in the central hole in the electromagnet assembly 9, the upper end of the pre-tightening spring 7 is propped against the step part 51, the lower end of the pre-tightening spring is positioned above the armature 4, an adjusting gasket 6 is arranged on the rod part of the valve core 5 between the pre-tightening spring 7 and the armature 4 and used for adjusting the pre-tightening force of the armature 4, the part of a non-circular sealing boss,
The annular sealing boss 4a arranged on the lower end face of the armature iron 4 and the annular step part arranged on the upper end of the boss 2a are subjected to plane sealing under the action of the pressing force of the pre-tightening spring 7 on the armature iron 4.
As shown in fig. 3, the damping pad 21 is uniformly provided with 9 zigzag grooves 211, and the inlets and outlets of the zigzag grooves 211 are respectively provided on the inner side wall and the outer side wall of the damping pad 21, so that the zigzag grooves 211 communicate the inner part and the outer part of the damping pad 21.
A blind groove 212 penetrating through the zigzag-shaped groove 211 is formed in the zigzag-shaped groove 211, and the blind groove 212 is intersected with the zigzag-shaped groove 211; the blind groove 212 is arranged to enable the hydraulic damping effect to be better.
Referring to fig. 1 and 2, a support member is disposed below the damping pad 21: and the damping pad adjusting gasket 22 is sleeved on the annular step part on the boss 2a of the orifice plate 2 below the damping pad 21, and is used for adjusting the assembling compression amount of the damping pad 21.
The damping pad 21 is made of an elastic material, namely fluororubber.
The interference magnitude between the inner ring of the damping cushion 21 and the outer ring of the annular step part of the orifice plate 2 is 0.1 mm-0.8 mm, and the compression magnitude of the non-annular sealing boss part at the lower end of the armature 4 after the damping cushion 21 is assembled is 0.15 mm-2.5 mm.
Example 2
The injector control valve in this embodiment is basically the same as embodiment 1 except that: as shown in fig. 4 and 5, the supporting member of the damping pad 21 is not the damping pad adjustment shim 22, but a circular ring-shaped retaining ring 23 is provided inside the damping pad 21, and the retaining ring 23 is integrally formed with the damping pad 21 to serve as a support for adjusting the assembling compression amount of the damping pad 21.
As shown in fig. 6, the zigzag groove 211 is of a notch convergent type with respect to the groove bottom.
Example 3
The injector control valve in this embodiment is basically the same as embodiment 1 except that: as shown in fig. 7, a guide portion 31 is provided above the control valve seat 3, the guide portion 31 is an annular boss, the return spring 11 is sleeved on the guide portion 31, the lower end of the armature 4 passes through the return spring 14 to perform plane sealing with the upper end of the orifice plate 2, and the return spring 11 is located between the control valve seat 3 and the armature 4.
Detailed working process: the control valve seat 3 is tightly pressed on the throttle orifice plate 2, the control valve seat 3 is in threaded connection with the oil injector body 1, and the throttle orifice plate 2 is fixed between the control valve seat 3 and the oil injector body 1, so that the utility model relates to an oil injector control valve is fixed in the oil injector body 1, a valve core 5, a pre-tightening spring 7, an adjusting gasket 6 is assembled in a hole in an electromagnet assembly 9, a stroke adjusting ring 10 is arranged between the electromagnet assembly 9 and the oil injector body 1, and the electromagnet assembly 9, the stroke adjusting ring 10 and the oil injector body 1 are fixed together by using the threaded fit connection between an electromagnet tightening cap 8 and the oil injector body 1;
When the electromagnetic valve component 9 is electrified, the armature 4 is attracted to overcome the spring force of the pre-tightening spring 7 to move upwards, the annular sealing boss 4a of the armature 4 is separated from the annular step part at the upper end of the orifice plate 2, and oil flows out from the sealing position along the gap between the damping pad 21 and the lower end face of the armature 4 and the zigzag groove 211 of the damping pad 21;
When the electromagnetic valve component 9 is not electrified, the electromagnetic force disappears, the armature 4 moves downwards under the action of the pre-tightening spring 7, the lower end surface of the armature 4 compresses the damping cushion 21 downwards in the downward movement process of the armature 4, on one hand, the damping cushion 21 elastically deforms to generate mechanical elastic damping force, on the other hand, the oil which does not flow out can only flow out through the inlet and the outlet of the zigzag groove 211, and in the flowing-out process, because the oil flow channel of the damping cushion 21 is prolonged, the flowing-out oil channel is tortuous and changeable, and simultaneously the oil channel path is increased and closed by penetrating through the crossed blind groove 212, the throttling in the oil flowing-out process is obvious, a double superposition effect is generated, the hydraulic damping effect is increased, the armature 4 is influenced by the double seating of the mechanical elastic damping and the hydraulic damping, the rigid impact of the armature 4 in the process is obviously weakened, and the dynamic impact stress is reduced, the wear is reduced, the advantages are obvious compared with the technical scheme of only relying on hydraulic damping in the prior art, and meanwhile, the production and assembly are not increased in difficulty.
Claims (5)
1. The fuel injector control valve is characterized by comprising a fuel injector body (1), a throttle orifice plate (2), a control valve seat (3), an armature (4), a valve core (5), a pre-tightening spring (7) and an electromagnet assembly (9), wherein the control valve seat (3) is in threaded connection with the fuel injector body (1), the throttle orifice plate (2) is fixed between the control valve seat (3) and the fuel injector body (1), a boss (2a) is arranged at the upper end of the throttle orifice plate (2), a circular ring-shaped step part is arranged on the boss (2a), a damping pad (21) is sleeved on the circular ring-shaped step part and is in interference fit connection with the circular ring-shaped step part, a circular ring sealing boss (4a) is arranged on the lower end face of the armature (4), the armature (4) is positioned above the throttle orifice plate (2), the circular ring sealing boss (4a) is in contact with the boss (2a), the middle part of the armature (4), the rod part of the valve core (5) sequentially penetrates through the middle holes of the electromagnet assembly (9) and the armature (4), the part of the valve core (5) extending into the middle hole of the armature (4) is matched and connected with a matching part of the armature (4), a step part (51) arranged at the upper end of the rod part of the valve core (5) is clamped at the top of the middle hole of the electromagnet assembly (9), a pre-tightening spring (7) is sleeved at the rod part of the valve core (5) in the middle hole of the electromagnet assembly (9), the upper end of the pre-tightening spring (7) is propped against the step part (51), the lower end of the pre-tightening spring is positioned above the armature (4), an adjusting gasket (6) is arranged on the rod part of the valve core (5) between the pre-tightening spring (7) and the armature (4) and used for adjusting the pre-tightening force of the armature (4), the part of the lower end of the armature (4) which is not provided with a circular ring, the inlet and the outlet of the n-shaped groove (211) are respectively arranged on the inner side wall and the outer side wall of the damping pad (21), so that the n-shaped groove (211) is communicated with the inner part and the outer part of the damping pad (21).
2. The fuel injector control valve according to claim 1, characterized in that a circular sealing boss (4a) arranged on the lower end face of the armature (4) and a circular stepped portion arranged on the upper end of the boss (2a) perform plane sealing under the pressing force action of the pretension spring (7) on the armature (4).
3. The injector control valve according to claim 1, characterized in that the zigzag-shaped groove (211) is provided with a blind groove (212) penetrating the zigzag-shaped groove (211), and the blind groove (212) intersects the zigzag-shaped groove (211).
4. The injector control valve according to claim 1, characterized in that the damping pad (21) is provided with a support member for adjusting an assembling compression amount of the damping pad (21).
5. Injector control valve according to claim 1, characterized in that the damping washer (21) is an elastic material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920333030.2U CN209781111U (en) | 2019-03-16 | 2019-03-16 | Oil injector control valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920333030.2U CN209781111U (en) | 2019-03-16 | 2019-03-16 | Oil injector control valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209781111U true CN209781111U (en) | 2019-12-13 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920333030.2U Active CN209781111U (en) | 2019-03-16 | 2019-03-16 | Oil injector control valve |
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| CN (1) | CN209781111U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112305069A (en) * | 2020-10-22 | 2021-02-02 | 国网山东省电力公司鱼台县供电公司 | Post insulator detection device and method |
-
2019
- 2019-03-16 CN CN201920333030.2U patent/CN209781111U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112305069A (en) * | 2020-10-22 | 2021-02-02 | 国网山东省电力公司鱼台县供电公司 | Post insulator detection device and method |
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