CN104018966A - Pressure accumulation flow-limiting type electromagnetic control oil sprayer - Google Patents
Pressure accumulation flow-limiting type electromagnetic control oil sprayer Download PDFInfo
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- CN104018966A CN104018966A CN201410234334.5A CN201410234334A CN104018966A CN 104018966 A CN104018966 A CN 104018966A CN 201410234334 A CN201410234334 A CN 201410234334A CN 104018966 A CN104018966 A CN 104018966A
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Abstract
The invention provides a pressure accumulation flow-limiting type electromagnetic control oil sprayer which comprises an oil sprayer head, an oil sprayer body, a flow limiting component, an electromagnetic valve component, a needle valve reset spring, a locating pin, a nozzle, a needle valve, a needle valve limiting block, a valve seat, a tightening cap and a sealing ring. A pressure accumulation cavity is formed in the oil sprayer body, the pressure accumulation cavity is respectively communicated with a main oil inlet in the oil sprayer head and a first oil passing hole in the limiting block, the flow limiting component is arranged in the oil sprayer body, the lower end of the flow limiting component is communicated with a fuel oil channel in the oil sprayer body, the needle valve cavity is communicated with a second oil cavity through a fourth oil inlet in the needle valve limiting block, a first oil cavity is communicated with a high-pressure fuel oil path in the oil sprayer body through a third oil inlet in the vale seat, an oil drainage opening is communicated with an oil return opening through a low-pressure oil path in the oil sprayer body, and the needle valve limiting block is used as a spring seat of the needle valve reset spring to be arranged at the upper end of the needle valve. The pressure accumulation flow-limiting type electromagnetic control oil sprayer is high in response speed, high in control precision, flexible in oil spraying rule and stable in work in the small oil spraying quantity spraying process.
Description
Technical field
What the present invention relates to is a kind of oil sprayer, specifically diesel injector.
Background technique
Tradition mechanically controlled type oil sprayer take simple in structure and functional reliability high be major advantage, but because injection timing, injection pressure and injection rate are subject to the restriction of high pressure oil pump cam face, there is oil spout low-response, control the deficiencies such as fuel injection quantity low precision in it, is difficult to improve on its basis the fuel consumption and emission characteristic of motor.Electromagnetic control type oil sprayer for diesel engine EFI system is faster than mechanically controlled type oil sprayer speed of response, injection characteristics are controlled flexibly, also more accurate to the control of fuel injection quantity, yet also there is following shortcoming in it: the control piston that is present in needle-valve top has played certain limitation effect to the speed of response of further raising oil sprayer; Oil sprayer can cause Turbulence Flow aggravation in the working procedure such as oil spout and oil-break, cause the pressure surge that oil-fired system is violent, cause injection pressure and injection rate to occur larger fluctuation, fuel injection quantity control accuracy, difficulty are increased, and these are all the electromagnetic control type oil sprayer problem demanding prompt solutions that exploitation meets increasingly stringent Abgasgesetz.
Summary of the invention
The pressure accumulation current-limiting type electromagnetic control oil sprayer of working stability while the object of the present invention is to provide little fuel injection quantity to spray.
The object of the present invention is achieved like this:
Pressure accumulation current-limiting type electromagnetic control oil sprayer of the present invention, it is characterized in that: comprise injector head, oil injector body, current limliting assembly, electromagnetic valve component, valve seat, needle-valve limiting stopper, nozzle, needle-valve, injector head is arranged on oil injector body, main oil inlet hole is set in injector head, pressure accumulation chamber is set in oil injector body, main oil inlet hole communicates with pressure accumulation chamber, and oil injector body, valve seat, needle-valve limiting stopper, nozzle are connected from top to bottom successively, current limliting assembly comprises limiting stopper, current limliting piston, sliding sleeve, ball valve, current limliting piston and sliding sleeve are arranged in pressure accumulation chamber from top to bottom, mounting ball valve Returnning spring and supporting slider in sliding sleeve, ball valve is arranged between current limliting piston and supporting slider, in current limliting piston, damping spring is installed, mounting limit piece on current limliting piston, arranges the first oil inlet hole that is communicated with pressure accumulation chamber and current limliting piston on limiting stopper, sliding sleeve below arranges the second oil inlet hole communicating with it, electromagnetic valve component comprises electromagnet, control valve rod, armature, electromagnet is arranged in valve seat, coil is arranged in electromagnet, groove is set in electromagnet, armature is arranged on coil below, controlling valve rod is connected with armature, control the upper-end part of driving of valve rod in groove, the upper end portion cover of controlling valve rod has the valve rod of control Returnning spring, controlling valve rod Returnning spring withstands on electromagnet, control between valve rod middle part and valve seat and form the first oil pocket, control stem bottom and valve seat, between needle-valve limiting stopper, form the second oil pocket, between needle-valve limiting stopper and nozzle, form needle-valve chamber, needle-valve is arranged in nozzle, cover has the needle-valve upper end portion of needle-valve Returnning spring to be arranged in needle-valve chamber, Sheng oil pocket is set between needle-valve and nozzle, oil injector body, valve seat, needle-valve limiting stopper, the the first-the second oil circuit is set respectively on nozzle, first-, tetra-oil circuits communicate successively, the first oil circuit is communicated with the second oil inlet hole, the 4th oil circuit is communicated with contains oil pocket, the 3rd oil inlet hole is set in valve seat, the 4th oil inlet hole is set in needle-valve limiting stopper, the 3rd oil inlet hole is communicated with respectively the first oil pocket and the second oil circuit, the 4th oil inlet hole is communicated with respectively the second oil pocket and needle-valve chamber, control valve rod bottom side top and be arranged to sealing surface on control valve, control stem bottom below and be arranged to control valve lower sealing surface, on control valve, sealing surface matches with valve seat, in needle-valve limiting stopper, drain tap is set, control valve lower sealing surface matches with drain tap, in oil injector body, have return opening, drain tap communicates with return opening.
The present invention can also comprise:
1, on current limliting piston, have the metering hole that is communicated with current limliting piston and space, ball valve place.
2, controlling valve rod is connected with armature by stop ring.
3, oil injector body, valve seat, needle-valve limiting stopper, nozzle overcoat have tight cap, and tight cap is connected oil injector body, valve seat, needle-valve limiting stopper, nozzle overcoat.
Advantage of the present invention is: the present invention adopts current limliting modular construction, can effectively prevent that undesired lasting oil spout from appearring in oil sprayer, guaranteed reliability and the fuel economy of oil sprayer work; The present invention directly controls releasing of needle-valve chamber inner high voltage fuel oil by solenoid valve, and then needle-valve is directly driven, be conducive to the quick response of needle-valve, high to the control accuracy of needle-valve, fuel injection characteristic is flexible, has effectively improved the power character of diesel engine and the Economy of fuel oil; Pressure accumulation cavity configuration on oil injector body can effectively reduce the pressure surge causing in oil sprayer working procedure, is conducive to the accurate control to fuel injection quantity, can further improve the oil spout stability of oil sprayer when little fuel injection quantity operating mode work.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention;
Fig. 2 is current limliting modular construction enlarged view of the present invention;
Fig. 3 is electromagnetic valve component structure enlarged view of the present invention.
Embodiment
Below in conjunction with accompanying drawing, for example the present invention is described in more detail:
In conjunction with Fig. 1～3, a kind of pressure accumulation current-limiting type of the present invention electromagnetic control oil sprayer, it is comprised of injector head 1, oil injector body 2, current limliting assembly 3, electromagnetic valve component 5, needle-valve Returnning spring 6, locating stud 7, nozzle 10, needle-valve 11, needle-valve limiting stopper 13, valve seat 14, tight cap 15 and seal ring 16.It is characterized in that: on oil injector body 2, have pressure accumulation chamber 17, pressure accumulation chamber 17 is connected with the main oil inlet hole 18 on injector head 1, oil pocket in current limliting piston 27 is connected with pressure accumulation chamber 17 by the first oil inlet hole 28 on limiting stopper 19, oil pocket in current limliting piston 27 is equipped with damping spring 20, on current limliting piston 27, have metering hole 26, current limliting piston 27 is coupled as the valve seat of ball valve 21, sliding sleeve 25 as ball valve 21 valve seats is fixed in oil injector body 2, supporting slider 22 can reciprocatingly slide in sliding sleeve 25, ball valve Returnning spring 23 presses supporting slider 22 to ball valve 21, during electromagnetic valve coil 30 power-off, control valve lower sealing surface 36 is pressed on the lower seal valve seat of needle-valve limiting stopper 13 by control valve rod Returnning spring 41, after coil 30 energisings, controlling valve rod 32 lifts, on control valve, sealing surface 37 is pressed on the upper seal support face of valve seat 14, needle-valve 11 is compacted on the pintle valve seat of nozzle 10 by needle-valve Returnning spring 6, needle-valve chamber 12 is connected with the second oil pocket 33 by the 4th oil inlet hole 35 of needle-valve limiting stopper 13, during coil 30 no electric circuit, the second oil pocket 33 is connected with the first oil pocket 39, the first oil pocket 39 is connected with the high-pressure oil passage on oil injector body 2 by the 3rd oil inlet hole 38, control lifting and taking a seat and control respectively the break-make of the first oil pocket 39 and the second oil pocket 33 and the second oil pocket 33 and drain tap 34 of valve rod 32.
Fig. 1 is the overall structure schematic diagram of pressure accumulation current-limiting type electromagnetic control oil sprayer of the present invention, comprises 1 injector head, 2 oil injector bodies, 3 current limliting assemblies, 5 electromagnetic valve components, 6 needle-valve Returnning springs, 7 locating studs, 10 nozzles, 11 needle-valves, 13 needle-valve limiting stoppers, 14 valve seats, 15 tight cap and 16 seal rings.On oil injector body 2, have pressure accumulation chamber 17, on injector head 1, have main oil inlet hole 18, pressure accumulation chamber 17 is connected with main oil inlet hole 18, main oil inlet hole 18 is connected with high pressure inflow pipeline, injector head 1 is fastened on oil injector body 2, drain tap 34 is connected with return opening 4 by the low pressure oil duct on oil injector body 2, return opening 4 is connected with low pressure fuel pipe, needle-valve Returnning spring 6 compresses needle-valve 11 to the pintle valve seat of nozzle 10, between needle-valve 11 and nozzle 10, form and contain oil pocket 8, needle-valve chamber 12 is connected with the 4th oil inlet hole 35, the 3rd oil inlet hole 38 is connected with the high-pressure oil passage on oil injector body 2, solenoid valve is controlled lifting of valve rod 32 by control and is taken a seat and control the break-make of the first oil pocket 39 and the second oil pocket 33 and the second oil pocket 33 and drain tap 34, and then realize the switching between high low pressure oil circuit in oil sprayer of the present invention.Pressure accumulation chamber 17 in oil injector body 2 can reduce the fuel pressure fluctuation causing in working procedure of the present invention, is conducive to the accurate control of electronic control unit to fuel injection quantity, and especially the control accuracy for little oil mass can significantly improve.Simultaneously, when the present invention is applied in high pressure common rail fuel injection system, the pressure stabilization function in pressure accumulation chamber 17 can make the size of common rail for diesel engine pipe reduce to a certain extent, and this is conducive to reduce the requirement of common rail pipe high-strength material, improve its working life, and can save the installing space of common rail pipe.
Limiting stopper 19, damping spring 20, ball valve 21, supporting slider 22, ball valve Returnning spring 23, the second oil inlet hole 24, sliding sleeve 25, metering hole 26, current limliting piston 27 and the first oil inlet hole 28 have formed the current limliting assembly 3 of pressure accumulation current-limiting type electromagnetic control oil sprayer jointly, as shown in Figure 2.Current limliting piston 27 and supporting slider 22 are usingd respectively as valve seat in ball valve 21 two ends, damping spring 20 is contained in the oil pocket in current limliting piston 27, oil pocket in current limliting piston 27 is connected with pressure accumulation chamber 17 by the first oil inlet hole 28 having on limiting stopper 19, on current limliting piston 27, have metering hole 26, supporting slider 22 is compacted to ball valve 21 by ball valve Returnning spring 23, sliding sleeve 25 as ball valve 21 seat surfaces is fixed in oil injector body 2, supporting slider 22 can reciprocatingly slide in sliding sleeve 25, the second oil inlet hole 24 is connected with high pressure fuel oil duct in oil injector body 2 and the high-voltage oil cavity at ball valve Returnning spring 23 places respectively, supporting slider 22 has axial fuel oil through hole, supporting slider 22 has side direction fuel oil through hole near one end of ball valve 21, axially fuel oil through hole is connected with side direction fuel oil through hole, limiting stopper 19 as damping spring 20 spring seats limits the maximum displacement that current limliting pistons 27 make progress, limiting stopper 19 is fixed in oil injector body 2 by screw thread.During the normal oil spout of oil sprayer, high pressure fuel in oil sprayer is injected to burning Indoor Combustion by spray orifice 9, ejection due to fuel oil, in the chamber at ball valve Returnning spring 23 places, fuel pressure reduces, and due to the throttling action of 26 pairs of fuel oils of metering hole, in the chamber at damping spring 20 places, fuel pressure is larger, current limliting piston 27 moves downward a segment distance because two ends pressure reduction drives ball valve 21 and supporting slider 22, oil mass with compensation ejection, but ball valve 21 can not taken a seat downwards to sliding sleeve 22 valve seats, be ball valve 21 blow-by, after end of injection, current limliting piston 27 two ends pressure reduction are decreased to balance gradually, effect current limliting piston 27 due to ball valve Returnning spring 23, ball valve 21 and supporting slider 22 return to initial position, when spray orifice 9 is often opened, there is the undesired oil spout continuing in oil sprayer, when the fuel oil quality flowing out from pressure accumulation chamber 17 surpasses maximum oil mass, excessive owing to flowing through the oil mass of metering hole 26, flow velocity is too fast, current limliting piston 27 is because the pressure difference at two ends is pressed down fast from position of rest, ball valve 21 is pressed towards on the valve seat of sliding sleeve 25 thereupon, and sealed seat surface, now, high pressure fuel in pressure accumulation chamber 17 no longer flows to the second oil inlet hole 24 by the first oil inlet hole 28 and metering hole 26, until oil sprayer stops undesired oil spout, the waste of fuel oil while effectively having avoided oil sprayer malfunction, be conducive to the Economy of fuel oil and the reliability of oil sprayer work.
On solenoid valve electrical connector 29, coil 30, stop ring 31, control valve rod 32, the second oil pocket 33, drain tap 34, the 4th oil inlet hole 35, control valve lower sealing surface 36, control valve, sealing surface 37, the 3rd oil inlet hole 38, the first oil pocket 39, armature 40, control valve rod Returnning spring 41 and electromagnet 42 have formed the electromagnetic valve component 5 of pressure accumulation current-limiting type electromagnetic control oil sprayer jointly, as shown in Figure 3.Coil 30 is connected with engine electric-controlled unit by solenoid valve electrical connector 29, and then rising and falling of valve rod 32 controlled in control, armature 40 is fixed on and is controlled on valve rod 32 by stop ring 31, and motion therewith, controlling valve rod 32 is compacted on the valve seat of needle-valve limiting stopper 13 by controlling valve rod Returnning spring 41, the high pressure fuel oil duct that the 3rd oil inlet hole 38 is communicated with on the first oil pocket 39 and oil injector body 2, the 4th oil inlet hole 35 is communicated with the second oil pocket 33 and needle-valve chamber 12, control on valve rod 32 and have sealing surface 37 and 36 two sealing surfaces of control valve lower sealing surface on control valve, sealed seat surface on needle-valve limiting stopper 13 matches with control valve lower sealing surface 36, sealed seat surface on valve seat 14 matches with sealing surface on control valve 37.During coil 30 power-off, as shown in Figure 3, owing to controlling the elastic force effect of valve rod Returnning spring 41, controlling valve rod 32 is forced on the valve seat of needle-valve limiting stopper 13, 36 sealings of control valve lower sealing surface, on control valve, sealing surface 37 is opened, the second oil pocket 33 cuts off with drain tap 34, the first oil pocket 39 is connected with the second oil pocket 33, the high pressure fuel being flowed down by pressure accumulation chamber 17 the 3rd oil inlet hole 38 of flowing through enters the first oil pocket 39, flow into again the second oil pocket 33, by the 4th oil inlet hole 35, flow into needle-valve chamber 12, now, the suffered fuel oil hydraulic coupling of needle-valve 11 lower surfaces of making a concerted effort to be greater than of the elastic force of the needle-valve suffered hydraulic coupling of 11 upper surface and needle-valve Returnning spring 6, therefore needle-valve 11 is taken a seat and is not lifted, not oil spout of oil sprayer, after coil 30 energisings, when the electromagnetic force of its generation is greater than the initial tension of spring of controlling valve rod Returnning spring 41, electromagnetic attracting force armature 40 moves upward, sealing surface 37 sealings on control valve, control valve lower sealing surface 36 is opened, the first oil pocket 39 and the second oil pocket 33 cut off, the second oil pocket 33 is communicated with drain tap 34, needle-valve chamber 12 is connected with drain tap 34 by the 4th oil inlet hole 35, high pressure fuel in needle-valve chamber 12 flow back in fuel tank by the return opening 4 being connected with low pressure fuel pipe, now, the suffered fuel oil hydraulic coupling of needle-valve 11 upper surfaces reduces rapidly, when the elastic force of itself and needle-valve Returnning spring 6 make a concerted effort to be less than the suffered hydraulic coupling of needle-valve 11 lower surfaces time, needle-valve 11 upwards lifts, oil sprayer commencement of fuel injection.Control lifting and taking a seat and control the first oil pocket 39 and the second oil pocket 33 and the second oil pocket 33 and drain tap 34 break-makes of valve rod 32, and then control the break-make of needle-valve chamber 12 and high pressure pressure accumulation chamber 17 or low-pressure reservoir, thereby realize the conversion of high low pressure fuel path in oil sprayer.
During diesel engine work, high pressure fuel enters the pressure accumulation chamber 17 in oil injector body 2 by the main oil inlet hole 18 on injector head 1, through current limliting assembly 3 parts that are connected with pressure accumulation chamber 17, enter and contain in oil pocket 8, another part by the 3rd oil inlet hole 38, the first oil pocket 39, the second oil pocket 33, the 4th oil inlet hole 35, enters in needle-valve chamber 12 respectively.After the energising fuel injection signal that electromagnetic valve coil 30 receives from ECU (Electrical Control Unit), armature 40 is subject to electromagnetic attracting force and moves upward, pull control valve rod 32 to move upward simultaneously, sealing surface 37 sealings on control valve, the first oil pocket 39 is no longer communicated with the second oil pocket 33, control valve lower sealing surface 36 is opened, the second oil pocket 33 is communicated with drain tap 34, draining oil circuit is opened, needle-valve chamber 12 inner high voltage fuel oils enter in low pressure oil way by the return opening 4 on oil injector body 2, now, the interior fuel pressure in needle-valve chamber 12 reduces rapidly, contain the interior fuel pressure of oil pocket 8 and be greater than the interior fuel pressure in needle-valve chamber 12, the suffered hydraulic coupling making progress of needle-valve 11 is greater than the elastic force of its suffered downward hydraulic coupling and needle-valve Returnning spring 6 and makes a concerted effort, needle-valve 11 leaves needle valve seat surface and lifts, oil sprayer commencement of fuel injection, when electromagnetic valve coil 30 power-off, control valve rod 32 moves downward under the elastic force effect of controlling valve rod Returnning spring 41, 36 sealings of control valve lower sealing surface, the second oil pocket 33 is no longer communicated with drain tap 34, draining oil circuit is closed, on control valve, sealing surface 37 is opened, the first oil pocket 39 is communicated with the second oil pocket 33, high pressure in pressure accumulation chamber 17 the 3rd oil inlet hole 38 of flowing through successively, the first oil pocket 39, the second oil pocket 33, the 4th oil inlet hole 35, again enter in needle-valve chamber 12, now, fuel pressure in needle-valve chamber 12 recovers to equate with the fuel pressure in containing oil pocket 8, needle-valve 11 is taken a seat under the spring-force driven dual of needle-valve Returnning spring 6, oil sprayer end of injection.
From above-mentioned working procedure, in the injection process of pressure accumulation current-limiting type electromagnetic control oil sprayer of the present invention, the action response of needle-valve 11 coordinates solenoid valve directly to drive by high pressure fuel, quick action, control accuracy is high, fuel injection characteristic is flexible and changeable, can effectively improve the power performance and the economy performance of diesel engine, makes diesel engine can meet stricter Abgasgesetz; The pressure surge that pressure accumulation chamber 17 can reduce to cause in fuel injection processes, be conducive to the accurate control to fuel injection quantity, simultaneously, when oil sprayer of the present invention is applied to Common rail fuel injection system, can reduce the physical dimension of common rail pipe, thereby reduce the requirement of the common rail pipe strength of materials, improve its working life; Adopt current limliting modular construction, can effectively avoid the fuel economy causing due to the undesired lasting oil spout of oil sprayer to decline, guaranteed the reliability of work of the present invention.
Pressure accumulation current-limiting type electromagnetic control oil sprayer comprises injector head, oil injector body, current limliting assembly, electromagnetic valve component, needle-valve Returnning spring, locating stud, nozzle, needle-valve, needle-valve limiting stopper, valve seat, tight cap and seal ring.On oil injector body, have pressure accumulation chamber, pressure accumulation chamber is connected with main oil inlet hole on injector head and the first oil through on limiting stopper respectively, current limliting assembly is arranged in oil injector body, current limliting assembly lower end is communicated with the fuel oil oil duct in oil injector body, needle-valve chamber is connected with the second oil pocket by the 4th oil inlet hole on needle-valve limiting stopper, the first oil pocket is communicated with the high pressure fuel oil circuit in oil injector body by the 3rd oil inlet hole on valve seat, drain tap is communicated with return opening by the low pressure oil way in oil injector body, needle-valve limiting stopper is arranged on needle-valve upper end as the spring seat of needle-valve Returnning spring.
Current limliting assembly comprises limiting stopper, damping spring, ball valve, supporting slider, ball valve Returnning spring, sliding sleeve and current limliting piston.Oil pocket in current limliting piston is connected with pressure accumulation chamber by the first oil inlet hole on limiting stopper, damping spring is contained in the oil pocket in current limliting piston, on current limliting piston, have metering hole, current limliting piston is coupled as the valve seat of ball valve, sliding sleeve as ball seat is fixed in oil injector body, supporting slider can reciprocatingly slide in sliding sleeve, ball valve Returnning spring presses supporting slider to ball valve, the second oil inlet hole is connected with the chamber at ball valve Returnning spring place and the high pressure fuel oil circuit in oil injector body respectively, supporting slider has axial fuel oil through hole and side direction fuel oil through hole, and axially fuel oil through hole is connected with side direction fuel oil through hole.
The first oil inlet hole is at least two and be symmetrical in oil sprayer axis arranged, and metering hole is at least one, and is symmetrical in oil sprayer axis arranged when a plurality of, and the cross-section area summation of the first oil inlet hole is greater than the cross-section area summation of metering hole.
The axial fuel oil through hole having on supporting slider is one, and the side direction fuel oil through hole having on supporting slider is at least two and be symmetrical in oil sprayer axis arranged.
Electromagnetic valve component comprises sealing surface, control valve lower sealing surface, armature, control valve rod Returnning spring and electromagnet on coil, stop ring, control valve rod, control valve.During coil blackout, control valve lower sealing surface is controlled valve rod Returnning spring and is pressed on the lower seal valve seat of needle-valve limiting stopper, and the first oil pocket is communicated with the second oil pocket; After coil electricity, control valve rod lifts, and on control valve, sealing surface compact is to the upper seal support face of valve seat, and the first oil pocket is no longer communicated with the second oil pocket, the second oil pocket is communicated with drain tap, controls lifting and taking a seat and control respectively the break-make of needle-valve chamber and the first oil pocket or drain tap of valve rod.
Claims (5)
1. pressure accumulation current-limiting type electromagnetic control oil sprayer, it is characterized in that: comprise injector head, oil injector body, current limliting assembly, electromagnetic valve component, valve seat, needle-valve limiting stopper, nozzle, needle-valve, injector head is arranged on oil injector body, main oil inlet hole is set in injector head, pressure accumulation chamber is set in oil injector body, main oil inlet hole communicates with pressure accumulation chamber, and oil injector body, valve seat, needle-valve limiting stopper, nozzle are connected from top to bottom successively, current limliting assembly comprises limiting stopper, current limliting piston, sliding sleeve, ball valve, current limliting piston and sliding sleeve are arranged in pressure accumulation chamber from top to bottom, mounting ball valve Returnning spring and supporting slider in sliding sleeve, ball valve is arranged between current limliting piston and supporting slider, in current limliting piston, damping spring is installed, mounting limit piece on current limliting piston, arranges the first oil inlet hole that is communicated with pressure accumulation chamber and current limliting piston on limiting stopper, sliding sleeve below arranges the second oil inlet hole communicating with it, electromagnetic valve component comprises electromagnet, control valve rod, armature, electromagnet is arranged in valve seat, coil is arranged in electromagnet, groove is set in electromagnet, armature is arranged on coil below, controlling valve rod is connected with armature, control the upper-end part of driving of valve rod in groove, the upper end portion cover of controlling valve rod has the valve rod of control Returnning spring, controlling valve rod Returnning spring withstands on electromagnet, control between valve rod middle part and valve seat and form the first oil pocket, control stem bottom and valve seat, between needle-valve limiting stopper, form the second oil pocket, between needle-valve limiting stopper and nozzle, form needle-valve chamber, needle-valve is arranged in nozzle, cover has the needle-valve upper end portion of needle-valve Returnning spring to be arranged in needle-valve chamber, Sheng oil pocket is set between needle-valve and nozzle, oil injector body, valve seat, needle-valve limiting stopper, the the first-the second oil circuit is set respectively on nozzle, first-, tetra-oil circuits communicate successively, the first oil circuit is communicated with the second oil inlet hole, the 4th oil circuit is communicated with contains oil pocket, the 3rd oil inlet hole is set in valve seat, the 4th oil inlet hole is set in needle-valve limiting stopper, the 3rd oil inlet hole is communicated with respectively the first oil pocket and the second oil circuit, the 4th oil inlet hole is communicated with respectively the second oil pocket and needle-valve chamber, control valve rod bottom side top and be arranged to sealing surface on control valve, control stem bottom below and be arranged to control valve lower sealing surface, on control valve, sealing surface matches with valve seat, in needle-valve limiting stopper, drain tap is set, control valve lower sealing surface matches with drain tap, in oil injector body, have return opening, drain tap communicates with return opening.
2. pressure accumulation current-limiting type electromagnetic control oil sprayer according to claim 1, is characterized in that: on current limliting piston, have the metering hole that is communicated with current limliting piston and space, ball valve place.
3. pressure accumulation current-limiting type electromagnetic control oil sprayer according to claim 1 and 2, is characterized in that: control valve rod and be connected with armature by stop ring.
4. pressure accumulation current-limiting type electromagnetic control oil sprayer according to claim 1 and 2, is characterized in that: oil injector body, valve seat, needle-valve limiting stopper, nozzle overcoat have tight cap, and tight cap is connected oil injector body, valve seat, needle-valve limiting stopper, nozzle overcoat.
5. pressure accumulation current-limiting type electromagnetic control oil sprayer according to claim 3, is characterized in that: oil injector body, valve seat, needle-valve limiting stopper, nozzle overcoat have tight cap, and tight cap is connected oil injector body, valve seat, needle-valve limiting stopper, nozzle overcoat.
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| CN201410234334.5A CN104018966B (en) | 2014-05-29 | 2014-05-29 | Pressure accumulation current-limiting type electromagnetic control oil sprayer |
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| CN201410234334.5A CN104018966B (en) | 2014-05-29 | 2014-05-29 | Pressure accumulation current-limiting type electromagnetic control oil sprayer |
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| CN104018966B CN104018966B (en) | 2016-06-29 |
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