CN214464611U - Small-inertia oil inlet control structure of high-pressure common rail oil injector - Google Patents
Small-inertia oil inlet control structure of high-pressure common rail oil injector Download PDFInfo
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- CN214464611U CN214464611U CN202120660693.2U CN202120660693U CN214464611U CN 214464611 U CN214464611 U CN 214464611U CN 202120660693 U CN202120660693 U CN 202120660693U CN 214464611 U CN214464611 U CN 214464611U
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Abstract
The small-inertia oil inlet control structure of the high-pressure common rail oil injector comprises an electromagnet component, an electromagnet spring, an armature rod, an oil injector body and a spring gasket, wherein the electromagnet spring is placed among a middle hole in the top end of the electromagnet component, the armature rod and the spring gasket, an armature sheet is placed at the bottom of the spring gasket, weight reducing holes and oil grooves which are uniformly distributed in an annular mode are formed in the armature sheet, an upper valve seat is installed at the bottom end of the armature sheet, a double-cone valve sleeve is sleeved on the lower section of the armature rod, a flow distribution plate is connected to the bottom end of the upper valve seat, and a lower valve seat is connected to the bottom end of the flow distribution plate. The hydraulic pressure that bears through bipyramid valve barrel reduces greatly, reduces the pretightning force of electro-magnet spring, and then can reduce the suction requirement of electro-magnet, reduces the manufacturing cost of electro-magnet, can reduce generating heat in the electro-magnet working process, improves electro-magnet operational reliability and life.
Description
Technical Field
The utility model relates to a sprayer technical field specifically is a cone valve high pressure common rail fuel injector's oil feed control structure.
Background
In the existing common rail injector assembly, as shown in fig. 1, after high-pressure oil is input into an injector body 8, the high-pressure oil must be input into an injector matching part through an oil inlet control structure, the existing oil inlet control structure comprises an electromagnet part 1, an electromagnet spring 2, an armature rod 3, an armature sheet 4, an upper valve seat 5, an upper armature seat 6A, a lower valve seat 7 and the injector body 8, the armature rod 3 always bears the action of high-pressure oil in an upward direction, when the electromagnet part 1 is powered off, the pretightening force of the electromagnet spring 2 is greater than the action of the high-pressure oil borne by the armature rod 3, and an oil inlet passage is in a closed state. When the oil sprayer needs to work, the electromagnet part 1 is powered on, at the moment, the suction force of the electromagnet part 1 is larger than the pre-tightening force of the electromagnet spring 2, the armature rod 3 moves upwards, and the high-pressure oil inlet passage is in an open state. Whether the oil inlet passage is open or not depends on the electromagnet member 1 controlling the armature rod 3.
In the oil injector with the existing structure, the armature plate 4 is of a solid structure and has heavy weight; armature rod 3 is overall structure, is equipped with the biconical face structure at its lower extreme, and armature rod 3 and upper armature seat 6A and lower disk seat 7 all need the idol cooperation, and length is great, and the dead weight is big, and electromagnet part 1 must have great suction just can realize the lifting control to armature rod 3 and armature plate 4 of big inertia, and consequently, electromagnet part 1's operating current is big, and this has just caused following shortcoming:
the electromagnet part has large working current and high energy consumption; the working temperature of the electromagnet component is high, the use failure rate of the electromagnet component is increased, and the service life of the electromagnet component is reduced; the pretightening force of the electromagnet spring 2 is too large, so that abrasion of the armature rod, the upper armature seat and the lower valve seat in the motion process is increased, and the opening and closing performance and reliability are deteriorated.
The utility model has the following contents:
an object of the utility model is to provide a high pressure common rail fuel injector inertia oil feed control structure to solve the problem that proposes among the above-mentioned background art.
In order to achieve the above object, the utility model provides a following technical scheme:
a small inertia oil inlet control structure of a high-pressure common rail oil sprayer comprises an electromagnet component, an electromagnet spring, an armature rod, an oil sprayer body and a spring gasket, wherein the electromagnet spring is arranged between the end face of an inner concave hole of the electromagnet component and the spring gasket and is sleeved at the upper section of the armature rod, an armature sheet is placed at the bottom of the spring gasket, the small inertia oil inlet control structure is characterized in that a central middle hole is formed in the center of the armature sheet, a lightening hole and an oil groove are formed in the top surface of the armature sheet, an upper valve seat is installed at the bottom end of the armature sheet, a double-cone valve sleeve is sleeved at the lower section of the armature rod, a splitter plate is connected to the bottom end of the upper valve seat, a lower valve seat is connected to the bottom end of the splitter plate, a top middle hole, an upper guide hole, an oil cavity, a lower guide hole and an upper cone hole are sequentially formed in the center of the upper valve seat from top to bottom, the oil cavity is arranged between the upper guide hole and the lower guide hole, the upper cone hole is arranged at the lower end of the lower guide hole, an oil return inclined hole is formed between the oil storage cavity and the bottom surface of the upper valve seat, a lower inner groove and a lower conical surface hole are formed in the top end of the center of the lower valve seat, the lower conical surface hole is formed in the upper end opening of the lower inner groove, a lower oil duct is arranged between the lower inner groove and the lower end surface of the lower valve seat, and a first oil duct and a second oil duct are further arranged between the upper end surface and the lower end surface of the lower valve seat.
Furthermore, the bipyramid valve barrel comprises a guide hole, an upper guide pillar, a lower guide pillar, an upper conical surface and a lower conical surface which are coaxially arranged, the upper conical surface is arranged at two ends of the lower guide pillar, the guide hole is matched with the armature rod coupling piece, the upper guide pillar is matched with the upper guide hole and the lower guide hole coupling piece, the outer diameter of the lower guide pillar is larger than that of the upper guide pillar, the upper conical surface corresponds to the oil storage cavity of the upper valve seat in a sealing mode, and the lower conical surface is in sealing butt joint with the lower conical surface hole of the lower valve seat.
Furthermore, the lower end face of the armature sheet is in end face mechanical seal fit with the upper end face of the double-cone valve sleeve, and the armature sheet, the double-cone valve sleeve and the top end middle hole enclose to form a damping cavity.
Further, the lower end of the ejector rod is in contact with the upper end of the oil nozzle needle valve rod.
Furthermore, the top surface of the armature piece is uniformly provided with more than three lightening holes and more than three oil grooves along the circumferential direction, and the lightening holes and the oil grooves are distributed at intervals.
Further, the lightening holes are blind holes.
Further, avoidance grooves are formed in the guide holes at intervals along the shaft to reduce the actual contact area with the armature rod.
Compared with the prior art, the beneficial effects of the utility model are that:
because the existing integral armature rod is improved into a split type sleeved structure, the oil inlet end of the common rail oil sprayer can be controlled by only vertically moving the double-cone valve sleeve, the moving force of the double-cone valve sleeve is far smaller than the acting force of the armature rod and the double-cone valve sleeve combination body, the actual stressed area of the double-cone valve sleeve bearing the high-pressure oil pressure of the inner groove under the lower valve seat is reduced, the hydraulic pressure borne by the double-cone valve sleeve is reduced, the pretightening force of the electromagnet spring can be reduced, the requirement on the suction force of the electromagnet can be further reduced, the manufacturing cost of the electromagnet is reduced, the requirement on the suction force of the electromagnet is reduced, the heat generated in the working process of the electromagnet can be reduced, the working reliability and the service life of the electromagnet are improved, the pretightening force of the electromagnet spring borne by the lower valve seat can be reduced, the impact force and the abrasion condition of the valve seat in working can be reduced, and the stability and the reliability of the oil inlet end of the oil sprayer are improved, thereby prolonging the service life of the oil sprayer assembly;
drawings
FIG. 1 is a schematic structural diagram of a conventional high-pressure common rail injector;
FIG. 2 is a schematic structural diagram of a high-pressure common rail fuel injector using the present invention;
FIG. 3 is a schematic view of the structure of the injector body;
FIG. 4 is a schematic structural view of the present invention;
FIG. 5 is a schematic view of the assembled structure between the armature rod, armature plate and the double cone valve sleeve;
fig. 6 is a structural schematic diagram of a double-cone valve sleeve;
FIG. 7 is a schematic view of the construction of an armature plate;
FIG. 8 is a top view of FIG. 7;
FIG. 9 is a schematic structural view of the upper seat;
FIG. 10 is a schematic view of the structure of the lower valve seat;
in the figure: 1-an electromagnet member; 2-electromagnet spring; 3-an armature rod; 4-armature plate; 5-upper valve seat; 6-a double-cone valve sleeve; 6A-upper armature base; 7-lower valve seat; 8-an injector body; 9-a top rod; 10-a nipple spring; 11-a transition block; 12-glib needle valve body; 13-choke needle valve stem; 14-a splitter plate; 15-nipple pad; 16-a spring washer; 17-a damping chamber; 18-a high pressure chamber; 41-central mesopore; 42-lightening holes; 43-oil groove; 51-apical mesopores; 52-upper pilot hole; 53-oil storage cavity; 54-lower guide hole; 55-upper conical surface hole; 56-oil return inclined hole; 61-a guide hole; 62-upper guide posts; 63-lower guide post; 64-an upper conical surface; 65-lower conical surface; 71-lower inner grooves; 72-lower conical surface hole; 73-lower oil duct; 74-oil duct two; 75-oil duct one; 81-oil inlet channel; 82-main oil gallery; 83-lower hole.
The specific implementation mode is as follows:
the high-pressure common rail injector with the small inertia and high reliability cone valve using the structure of the utility model is described below by combining the attached drawings, as shown in fig. 2-10, the high-pressure common rail injector comprises an electromagnet part 1, an electromagnet spring 2, an armature rod 3, an injector body 8 and a spring gasket 16, wherein the electromagnet spring 2 is arranged between the end surface of the concave hole of the electromagnet part 1 and the spring gasket 16 and is sleeved on the upper section of the armature rod 3, an armature sheet 4 is arranged at the bottom of the spring gasket 16, a central middle hole 41 is arranged at the center of the armature sheet 4, three lightening holes 42 and three oil grooves 43 are uniformly arranged on the top surface of the armature sheet 4 along the circumferential direction, the lightening holes 42 and the oil grooves 43 are arranged at intervals, an upper valve seat 5 is arranged at the bottom end of the armature sheet 4, a bipyramid valve sleeve 6 is sleeved on the lower section of the armature rod 3, a splitter plate 14 is connected at the bottom end of the upper valve seat 5, a lower valve seat 7 is connected at the bottom end of the splitter plate 14, a nozzle needle valve rod 13 is arranged at the bottom end of an oil injector body 8, a top rod 9 is connected at the top end of the nozzle needle valve rod 13, a nozzle gasket 15 is arranged at the outer side of the top rod 9, a nozzle spring 10 is sleeved at the upper section of the top rod 9, a transition block 11 is arranged between the lower end of the oil injector body 8 and an oil nozzle matching part, the top rod 9 and the nozzle spring 10 are sleeved and then arranged in a central hole of the transition block 11, a top end central hole 51, an upper guide hole 52, an oil storage cavity 53, a lower guide hole 54 and an upper conical surface hole 55 are sequentially arranged at the center of an upper valve seat 5 from top to bottom, the oil storage cavity 53 is arranged between the upper guide hole 52 and the lower guide hole 54, the upper conical surface hole 55 is arranged at the lower port of the lower guide hole 54, an oil return inclined hole 56 is arranged between the oil storage cavity 53 and the bottom surface of the upper valve seat 5, a lower inner groove 71 and a lower conical surface hole 72 are arranged at the top end of the center of a lower valve seat 7, the lower conical surface hole 72 is arranged at the upper port of the lower inner groove 71, a lower oil passage 73 is arranged between the lower inner groove 71 and the lower end face of the lower valve seat 7, and a first oil passage 75 and a second oil passage 74 are also arranged between the upper end face and the lower end face of the lower valve seat 7; the double-cone valve sleeve 6 comprises a guide hole 61, an upper guide post 62, a lower guide post 63, an upper conical surface 64 and a lower conical surface 65 which are coaxially arranged, the upper conical surface 64 is arranged at two ends of the lower guide post 63, the guide hole 61 is matched with a coupling piece of the armature rod 3, the upper guide post 62 is matched with a coupling piece of the upper guide hole 52 and the lower guide hole 54, the outer diameter of the lower guide post 63 is larger than that of the upper guide post 62, the upper conical surface 64 corresponds to an oil storage cavity 53 of the upper valve seat 5 in a sealing mode, and the lower conical surface 65 is in sealing butt joint with a lower conical surface hole 72 of the lower valve seat 7; the lower end face of the armature sheet 4 is in end face mechanical seal fit with the upper end face of the double-cone valve sleeve 6, and the armature sheet 4, the double-cone valve sleeve 6 and the top end middle hole 51 enclose to form a damping cavity 17; the lower end of the ejector rod 9 is contacted with the upper end of a nozzle needle valve rod 13; more than three lightening holes 42 and more than three oil grooves 43 are uniformly arranged on the top surface of the armature plate 4 along the circumferential direction, and the lightening holes 42 and the oil grooves 43 are distributed at intervals. The lightening holes 42 can be either through holes or blind holes.
In order to further reduce the sliding friction between the armature rod 3 and the double-cone valve sleeve 6, relief grooves are provided in the guide bore 61 at axial intervals in order to reduce the actual contact surface with the armature rod 3.
The working principle of the high-pressure common rail injector with the small inertia and the high reliability cone valve is as follows:
high-pressure oil sequentially enters a lower oil duct 73 and a lower inner groove 71 of a lower valve seat 7 through an oil inlet duct 81 of an oil sprayer body 8, when an electromagnet component 1 is not electrified, under the action of the pretightening force of an electromagnet spring 2, a conical surface of a double-cone valve sleeve 6 is mechanically sealed with a lower conical surface hole 72 of the lower valve seat 7, the high-pressure oil cannot enter a high-pressure cavity of a nozzle matching part, a nozzle needle valve rod 13 is mechanically sealed with a nozzle needle valve body 12 under the action of the pretightening force of a nozzle spring 10, and the oil sprayer does not spray oil; when the electromagnet component 1 is electrified, due to the action of electromagnetic force, the armature sheet 4 moves upwards, the double-cone valve sleeve 6 moves upwards under the action of high-pressure oil in the lower inner groove 71, the conical surface of the double-cone valve sleeve 6 leaves the lower conical surface hole 72 of the lower valve seat 7, the high-pressure oil enters the channel of the flow distribution plate 14 and then enters the high-pressure cavity 18 of the oil nozzle matching piece along the channel, the oil channel 75 of the lower valve seat 7 and the main oil channel 82 of the oil injector body 8, when the hydraulic pressure of the high-pressure cavity 18 on the oil nozzle needle valve rod 13 overcomes the pre-tightening force of the oil nozzle spring 10, the oil nozzle needle valve rod 13 moves upwards, the oil injector injects oil, the upper valve seat 5 provides a control function for the oil channel of the device, the armature rod 3 is matched with the double-cone valve sleeve 6, the excircle of the double-cone valve sleeve 6 is matched with the upper guide hole 52 and the lower guide hole 54 of the upper valve seat 5, the running accuracy of the device is increased, the actual stressed area of the double-cone valve sleeve 6 bearing the high-pressure oil of the lower inner groove 71 of the lower valve seat 7 is greatly reduced, hydraulic pressure that bipyramid valve barrel 6 bore just reduces greatly, can reduce the pretightning force of electro-magnet spring 2, the 2 pretightning forces of electro-magnet spring that lower disk seat 7 bore can reduce, impact force and the wearing and tearing condition of disk seat 7 during operation can be reduced, improve the stability and the reliability of sprayer work, improve the life of sprayer assembly, armature plate 4, bipyramid valve barrel 6 and last conical surface hole 55 integration constitute a damping chamber 17, ejector pin 9 terminal surface and the up end mechanical contact of glib needle valve rod 13, the lift of glib needle valve rod 13 adopts ejector pin 9 spacing, both can reduce cost, also can reduce the high-pressure sealed face, and then reduce the leakage risk because the high-pressure sealed face brings, ejector pin 9 need not couple cooperation, the manufacturing difficulty is low, reducible processing and use cost.
The above-mentioned, 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. A small inertia oil inlet control structure of a high-pressure common rail oil sprayer comprises an electromagnet component (1), an electromagnet spring (2), an armature rod (3), an oil sprayer body (8) and a spring gasket (16), wherein the electromagnet spring (2) is arranged between the end face of an inner concave hole of the electromagnet component (1) and the spring gasket (16) and is sleeved at the upper section of the armature rod (3), the bottom of the spring gasket (16) is provided with an armature sheet (4), the small inertia oil inlet control structure is characterized in that a central middle hole (41) is formed in the center of the armature sheet (4), a lightening hole (42) and an oil groove (43) are formed in the top surface of the armature sheet (4), an upper valve seat (5) is installed at the bottom end of the armature sheet (4), a double-cone valve sleeve (6) is sleeved at the lower section of the armature rod (3), a splitter plate (14) is connected at the bottom end of the upper valve seat (5), and a lower valve seat (7) is connected at the bottom end of the splitter plate (14), the oil storage device is characterized in that a top end middle hole (51), an upper guide hole (52), an oil storage cavity (53), a lower guide hole (54) and an upper conical surface hole (55) are sequentially formed in the center of an upper valve seat (5) from top to bottom, the oil storage cavity (53) is arranged between the upper guide hole (52) and the lower guide hole (54), the upper conical surface hole (55) is arranged at the lower port of the lower guide hole (54), an oil return inclined hole (56) is arranged between the oil storage cavity (53) and the bottom surface of the upper valve seat (5), a lower inner groove (71) and a lower conical surface hole (72) are arranged at the top end of the center of a lower valve seat (7), the lower conical surface hole (72) is arranged at the upper port of the lower inner groove (71), a lower oil channel (73) is arranged between the lower inner groove (71) and the lower end surface of the lower valve seat (7), and a first oil channel (75) and a second oil channel (74) are further arranged between the upper end surface and the lower end surface of the lower valve seat (7).
2. The high-pressure common rail injector small-inertia oil inlet control structure as claimed in claim 1, wherein the double-cone valve sleeve (6) comprises a guide hole (61), an upper guide pillar (62), a lower guide pillar (63), an upper conical surface (64) and a lower conical surface (65) which are coaxially arranged, the upper conical surfaces (64) are arranged at two ends of the lower guide pillar (63), the guide hole (61) is matched with a coupling of the armature rod (3), the upper guide pillar (62) is matched with the upper guide hole (52) and the lower guide hole (54), the outer diameter of the lower guide pillar (63) is larger than that of the upper guide pillar (62), the upper conical surface (64) is in sealing correspondence with the oil storage cavity (53) of the upper valve seat (5), and the lower conical surface (65) is in sealing butt joint with the lower conical surface hole (72) of the lower valve seat (7).
3. The small inertia oil inlet control structure of the high-pressure common rail injector according to claim 1, wherein the lower end surface of the armature plate (4) is in end surface mechanical sealing fit with the upper end surface of the double-cone valve sleeve (6), and the armature plate (4), the double-cone valve sleeve (6) and the top end middle hole (51) are enclosed to form a damping cavity (17).
4. The high-pressure common rail injector small inertia oil inlet control structure according to claim 1, characterized in that more than three lightening holes (42) and more than three oil grooves (43) are uniformly arranged on the top surface of the armature plate (4) along the circumferential direction, and the lightening holes (42) and the oil grooves (43) are distributed at intervals.
5. The high-pressure common rail fuel injector small inertia fuel inlet control structure as claimed in claim 4, wherein the lightening holes (42) are blind holes.
6. The high pressure common rail injector small inertia oil inlet control structure according to claim 2, characterized in that avoidance grooves are provided in the guide hole (61) at intervals along the shaft to reduce the actual contact area with the armature rod (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120660693.2U CN214464611U (en) | 2021-03-31 | 2021-03-31 | Small-inertia oil inlet control structure of high-pressure common rail oil injector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120660693.2U CN214464611U (en) | 2021-03-31 | 2021-03-31 | Small-inertia oil inlet control structure of high-pressure common rail oil injector |
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| Publication Number | Publication Date |
|---|---|
| CN214464611U true CN214464611U (en) | 2021-10-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120660693.2U Active CN214464611U (en) | 2021-03-31 | 2021-03-31 | Small-inertia oil inlet control structure of high-pressure common rail oil injector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214464611U (en) |
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2021
- 2021-03-31 CN CN202120660693.2U patent/CN214464611U/en active Active
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