CN205207025U - Normal close formula is bivalve electronic control fuel injection system for heavy oil - Google Patents
Normal close formula is bivalve electronic control fuel injection system for heavy oil Download PDFInfo
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- CN205207025U CN205207025U CN201520949851.0U CN201520949851U CN205207025U CN 205207025 U CN205207025 U CN 205207025U CN 201520949851 U CN201520949851 U CN 201520949851U CN 205207025 U CN205207025 U CN 205207025U
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Abstract
The utility model provides a normal close formula is bivalve electronic control fuel injection system for heavy oil, the utility model discloses a normal close formula is the automatically controlled monoblock pump of single valve, high pressure fuel pipe and electric fuel injector three for the heavy oil for the heavy oil. Wherein the normal close formula for the heavy oil the automatically controlled monoblock pump of single valve include gyro wheel plunger, fuel control valve and delivery valve triplex. High pressure fuel pipe and high pressure fuel pipe articulate delivery valve and electric fuel injector for the heavy oil. Electric fuel injector comprises electric fuel injector solenoid valve subtotal fuel sprayer part for the heavy oil. The utility model discloses the nimble control chronogenesis of adjusting high -pressure oil pump solenoid valve and electric fuel injector solenoid valve of accessible can obtain different control models.
Description
Technical field
The utility model relates to a kind of injection system, particularly relates to a kind of Normally closed type heavy oil bivalve electronic control injection system, belongs to engine electric-controlled injection system field.
Background technique
In recent years, diesel electric-controlled fuel injection technic obtains and develops rapidly, and increasing diesel engine is assembled with electric control fuel oil jet system.Tradition electronically controlled unit pump adopts roller to promote plunger pressurization fuel oil, controls the mode of fuel feed and draining with a normally open solenoid valve.Although can realize the control to circulating fuel injection quantity and injection timing, the process of establishing of injection pressure is very large by influence of rotation speed, and when diesel engine is in the slow-speed of revolution, fuel oil builds pressure slowly, and injection pressure is very low, and does not possess multi-injection ability.Bivalve fuel injection system adopts two solenoid valves to control, can not only realize fuel oil build pressure and fuel-injected independently control, the free adjusting of injection timing, fuel injection characteristic and circulating fuel injection quantity can also be realized.In whole condition range, the fuel injection characteristic of being realized ideal by the Collaborative Control between two solenoid valves, and keep very high fuel-injection pressure.In addition, there is good low-speed characteristic, and can multi-injection be carried out, realize the soft readjustment of oil-fired system.
Tradition bivalve electronic control injection system adopts normally open solenoid valve to control fuel feed and draining at monoblock pump end, there is following shortcoming: first, when the fault solenoid valves such as motor generation power down cannot power on, high pressure oil pump draining oil circuit is in normally open, and high pressure oil pump can not be met an urgent need fuel feeding; The second, when solenoid valve stuck in off position time, in valve, oil pressure can constantly raise, and causes harmful effect, cause other hydraulic pressure installation such as oil sprayer to be damaged to solenoid valve and oil sprayer; 3rd, solenoid valve break down but still can fuel feeding time, electronically controlled unit pump cannot complete the adjustment to fuel feeding moment and fuel delivery.In a word, traditional bivalve electronic control injection security of system is poor, does not possess the ability of fault being made to emergency reaction, cannot meet the requirement of engine operation Security.And above-mentioned traditional bivalve electronic control injection service system can not be applied directly in the middle of heavy oil diesel engine: understand some due to monoblock pump end from the fuel oil of control chamber earial drainage and flow through high pressure oil pump solenoid valve, oil sprayer end is understood some from the fuel oil of control chamber earial drainage and is flowed through electric-controlled fuel injector solenoid valve, but viscosity is larger during heavy oil normal temperature, need before work to heat it, the heavy oil that temperature is higher can make armature and electromagnet expanded by heating when contacting solenoid valve, causes solenoid valve cisco unity malfunction.
Summary of the invention
The utility model object is the Normally closed type bivalve electronic control injection system providing a kind of heavy oil diesel engine, have and control accurately., the high advantage of Security, simultaneously, electromagnet in High Temperature and Heavy Oil and high pressure oil pump solenoid valve and electric-controlled fuel injector solenoid valve, armature are kept apart, ensure the work that solenoid valve is safe and reliable, and cooling oil path is introduced in the electromagnetic valve body of high pressure oil pump solenoid valve and electric-controlled fuel injector solenoid valve, increase the stability of electromagnetic valve work.The purpose of this utility model is achieved in that and comprises Normally closed type heavy oil single valve electronically controlled unit pump, high-pressure oil pipe and heavy oil electric-controlled fuel injector, and described Normally closed type heavy oil single valve electronically controlled unit pump comprises roller plunger, fuel regulator valve and outlet valve three part;
Described roller plunger comprises driving cam, roller, pump oil piston, piston spring seat, piston spring, plunger housing, gear ring, ratch and the pump housing, described roller is arranged on the lower end of plunger housing, and driving cam coordinates with roller, and the upper end of plunger is positioned in the pump housing, lower end withstands on bottom plunger housing, piston spring is enclosed within outside plunger, the lower end of piston spring to be positioned in plunger housing and to withstand on spring seat, the upper end of piston spring withstands on pump housing lower end, form plunger cavity between plunger and the inwall of the pump housing, its upper end sidewall is arranged the spiral chute controlling spill port opening and closing, enclosure interior is provided with ratch, the gear ring matched with ratch is installed outside plunger bushing, the pump housing arranges oil inlet hole respectively, spill port, first oil circuit, oil inlet hole is connected with plunger cavity, and described fuel regulator valve is arranged on the top of the pump housing and comprises the first electromagnetic valve body, cushion block, first coil, electromagnet fixed core, first armature, solenoid valve valve rod, first spacing block, solenoid valve spring, oil drain valve valve rod, draining cone valve and cover plate, cushion block and the first electromagnetic valve body are arranged in juxtaposition, draining cone valve, draining cone valve valve rod is arranged in the pump housing, and the first armature connects draining cone valve valve rod by solenoid valve valve rod, and one end and the cover plate of draining cone valve are connected, the pump housing that the tapered end face of the other end is other with it coordinates, draining cone valve valve rod is also connected with the tapered end of draining cone valve, the first cooling oil path is processed with in electromagnetic valve body, first cooling oil path to be communicated with chamber, armature place with coil through electromagnet fixed core, first spacing block is between armature and solenoid valve spring seat and be threaded connection and be arranged on cushion block, first spacing block is processed with draining ring, solenoid valve spring seat is processed with return port, draining ring is connected with return port, return port is connected with chamber, solenoid valve spring place, chamber, solenoid valve spring place is communicated with described spill port by the first oil circuit, and draining cone valve valve rod left end connects draining cone valve, right-hand member connects draining cone valve spring, and draining cone valve valve rod intersects mutually with the second oil circuit, and the second oil circuit is communicated with oil inlet hole by plunger cavity, described outlet valve is arranged on pump housing top, and described outlet valve comprises the high-pressure oil pipe connection mouth and oil outlet valve spring arranged up and down, and the second oil circuit connects high-pressure oil pipe connection mouth by oil outlet valve spring,
Described heavy oil electric-controlled fuel injector comprises solenoid valve part and oil nozzle part, described solenoid valve part comprises the second electromagnetic valve body, oil injector body, second coil, second electromagnet, second armature, control valve rod, stop ring, second spacing block, seal valve base, high-pressure oil pipe joint, second coil and the second electromagnet are arranged in the second electromagnetic valve body, second armature is positioned at below the second electromagnet, second spacing block to be positioned at below the second armature and to be threaded connection and is fixed on oil injector body, second electromagnetic valve body top is processed with the second cooling oil path, the one end controlling valve rod is stuck on the second armature by stop ring, the other end passes the second spacing block below the second armature and is connected with seal valve base, second spacing block is arranged the second draining ring 44, oil nozzle part comprises needle-valve, needle-valve Returnning spring, spring pedestal, spacing orifice plate, injector valve base, control piston, control piston and needle-valve Returnning spring by spring pedestal by needle valve pressed to injector valve base, oil holding slot is formed between needle-valve and injector valve base, oil injector body is provided with the first oil-feed oil circuit, one end of first oil-feed oil circuit is communicated with high-pressure oil pipe by high-pressure oil pipe joint, the other end of the first oil circuit is connected with the second oil-feed oil circuit be arranged on spacing orifice plate, the end of the second oil circuit is connected with the 3rd oil-feed oil circuit be arranged on injector valve base, the end of the 3rd oil-feed oil circuit is communicated with oil holding slot, control cavity below described seal valve base and control piston formation control chamber, control chamber communicates with the first oil-feed oil circuit,
The two ends of described high-pressure oil pipe are connected with the high-pressure oil pipe connection mouth of outlet valve and the high-pressure oil pipe joint of solenoid valve part respectively.
The utility model also comprises some structure characteristics like this:
1. the part of draining cone valve valve rod intersecting with the second oil circuit arranges the first compression face and the second compression face respectively, first compression face and the second compression face lay respectively at draining cone valve side and the draining cone valve spring side of the second oil circuit, and the area of the first compression face is not less than 1.2 times of the second compression face area.
Compared with prior art, the beneficial effects of the utility model are: the independence that its injection process of Normally closed type heavy oil bivalve electronic control injection system of the present utility model achieves fuel feeding and oil spout controls.When normally working, fast, fuel-flow control is accurate for the response of this device.And this device is designed with protective measure on draining cone valve; when solenoid valve break down can not power on time; draining cone valve is in normally off and fuel regulator valve internal pressure can be caused constantly to raise; now under the effect of protective measure; draining cone valve can open draining oil circuit; make fuel oil flow back to low-pressure reservoir, reduce the fuel pressure in whole system, the safety of protection oil-fired system.On the other hand, normal close type oil drain valve of the present utility model is in closed condition in solenoid valve failure situation, and high pressure oil pump still can continue the function of fuel feeding.Under this failure condition, can by regulating ratch, the relative position driving gear ring to pull revolution sleeve to control plunger helix and oil inlet and oil return hole realizes the control to fuel feeding moment and fuel delivery.Owing to needing heating before heavy oil work, fuel regulator valve of the present utility model and the spacing block in electric-controlled fuel injector solenoid valve avoid the electromagnet of the too high heavy oil of temperature and solenoid valve, armature contacts, the work that guarantee solenoid valve can be safe and reliable; And cooling oil path is processed with on the electromagnetic valve body of fuel regulator valve and electric-controlled fuel injector solenoid valve, cooling lubricating oil can be introduced and cooled to make solenoid valve inside, the shock and vibration of armature can also be reduced, increase the stability of electromagnetic valve work.
Accompanying drawing explanation
Fig. 1 is the overall structure schematic diagram of the utility model Normally closed type heavy oil bivalve electronic control injection system;
Fig. 2 is the cam-plunger structural representation of the utility model Normally closed type heavy oil bivalve electronic control injection system;
Fig. 3 a is the heavy oil fuel regulator valve structural representation open in usual of the utility model Normally closed type heavy oil bivalve electronic control injection system, and Fig. 3 b is the partial schematic diagram of Fig. 3 a;
Fig. 4 is the delivery valve structure schematic diagram of the utility model Normally closed type heavy oil bivalve electronic control injection system;
Fig. 5 is the automatically controlled fuel injector magnetic system part-structure schematic diagram of heavy oil of the utility model Normally closed type heavy oil bivalve electronic control injection system;
Fig. 6 is the automatically controlled oil injector oil nozzle part-structure schematic diagram of heavy oil of the utility model Normally closed type heavy oil bivalve electronic control injection system.
Embodiment
Below in conjunction with accompanying drawing and embodiment, the utility model is described in further detail.
Composition graphs 1-6, Normally closed type heavy oil bivalve electronic control injection system of the present utility model is made up of Normally closed type heavy oil single valve electronically controlled unit pump, high-pressure oil pipe and heavy oil electric-controlled fuel injector.Wherein, Normally closed type heavy oil bivalve electronic control injection system is made up of roller plunger 1, fuel regulator valve 2 and outlet valve 3.Roller plunger 1 is made up of driving cam 6, roller 7, pump oil piston 8, the pump housing 9 plunger housing 9, piston spring seat 10, plunger return spring 11, gear ring 12, ratch 13, the pump housing 59, oil inlet hole 14, spill port 15 and plunger cavity 16.The top of plunger cavity 16 is provided with normal close type heavy oil fuel regulator valve, comprises electromagnetic valve body 17, first cooling oil path 18, coil 19, electromagnet fixed core 20, armature 21, solenoid valve valve rod 22, cushion block 60, spacing block 23, draining ring 24, return port 25, solenoid valve spring seat 26, coupling sleeve 27, solenoid valve spring 28, draining cone valve 29, oil drain valve valve rod 30, oil drain valve spring 31 and cover plate 32.Outlet valve 3 is arranged on pump housing top, is made up of high-pressure oil pipe connection mouth 33 and oil outlet valve spring 34.High-pressure oil pipe 35 is connected outlet valve and heavy oil electric-controlled fuel injector with high-pressure oil pipe joint 36.Heavy oil electric-controlled fuel injector is made up of electric-controlled fuel injector solenoid valve part 4 and oil nozzle part 5.The solenoid valve part 4 of heavy oil electric-controlled fuel injector comprises electromagnetic valve body 38, coil 39, electromagnet 40, armature 41, stop ring 42, spacing block 43, draining ring 44, controls valve rod 45, controls the structures such as valve rod Returnning spring 46, seal valve base 47.Coil 39 and electromagnet 40 are arranged on electromagnetic valve body 38 li, and armature 41 is positioned at below electromagnet 40, and the upper end controlling valve rod 45 is stuck on armature 41 by stop ring 42, can move together with armature 41.Spacing block 43 is positioned at below armature 41, is threaded connection and is fixed on oil injector body 49.The lower end controlling valve rod 45 is connected to seal valve base 47 through spacing block 43, and control valve rod Returnning spring 46 is positioned at the groove below spacing block 43, and the ball face sealing face controlled below valve rod can seal the draining oil circuit of control chamber 48.Seal valve base 47 is processed with draining oil circuit, is communicated with low pressure oil way with the oil leak hole of control chamber 48 respectively.The oil nozzle part 5 of heavy oil electric-controlled fuel injector comprises control piston 51, needle-valve Returnning spring 52, spring pedestal 53, spacing orifice plate 54, tight cap 55, needle-valve 56 and injector valve base 57 etc.Formation control chamber 48 between control piston 51 and control cavity 49, needle-valve Returnning spring 52 is enclosed within control piston 51 bottom, and needle-valve 56 is pressed on injector valve base 57 by spring pedestal 53 by control piston 51 and needle-valve Returnning spring 52.Oil holding slot 58 is formed between needle-valve 56 and injector valve base 57, oil injector body is provided with the first oil-feed oil circuit 50, one end of first oil-feed oil circuit is communicated with high-pressure oil pipe by high-pressure oil pipe joint, the other end of the first oil circuit is connected with the second oil-feed oil circuit 70 be arranged on spacing orifice plate, the end of the second oil circuit is connected with the 3rd oil-feed oil circuit 71 be arranged on injector valve base, the end of the 3rd oil-feed oil circuit is communicated with oil holding slot, control cavity 73 below described seal valve base and control piston formation control chamber, control chamber communicates with the first oil-feed oil circuit 50.
When Normally closed type heavy oil is with bivalve electronic control injection system worked well, fuel oil enters plunger cavity 16 by oil inlet hole 14, and driving cam 6 pushing rolling wheels 7 makes pump oil piston 8 up, and after closing oil inlet hole 14, the fuel oil in compression plunger chamber 16, completes force feed function.When the solenoid valve of fuel regulator valve 2 powers on, draining cone valve is subject to armature 21 and acts on electromagnetic force F on solenoid valve valve rod 22
3, the spring force F of solenoid valve spring 28
1, draining cone valve spring 31 acts on the spring force F on draining cone valve valve rod
2with liquid flow forces F
4.Draining cone valve spring 31 spring force F
2with electromagnetic force F
3the spring force F of solenoid valve spring 28 of making a concerted effort to be greater than
1with liquid flow forces F
4make a concerted effort, so whole valve rod is to left movement, solenoid valve valve rod 22 pulls draining cone valve 29, and draining cone valve 29 lifts, and draining first oil circuit 75 is opened, and fuel oil flows back to low-pressure reservoir by the first oil circuit 75 through spill port 15, can not set up high pressure in plunger cavity.When the solenoid valve of fuel regulator valve 2 does not power on, solenoid valve spring and draining cone valve spring are all located under compression, and draining cone valve 29 is subject to the spring force F of solenoid valve spring 28
1, draining cone valve spring 31 acts on the spring force F on draining cone valve valve rod
2with fuel pressure P.Due to solenoid valve spring 28 pretightening force F
1be greater than draining cone valve spring 31 pretightening force F
2, so draining cone valve 29 is landed on the conical surface, now draining oil circuit is in normally off, and the fuel oil in plunger cavity 16 flows to outlet valve 3 by the second oil circuit 76 after pump oil piston 8 compresses.When fuel pressure P is greater than the initial tension of spring of oil outlet valve spring 34, fuel oil enters oil sprayer through the high-pressure oil pipe be connected with high-pressure oil pipe connection mouth 33.Heavy oil electric-controlled fuel injector mainly realizes the control of oil spout, from the fuel oil that high-pressure oil pipe 31 enters, the pressure ratio lower end formed in oil sprayer inner needle valve 56 upper end is high, needle-valve 56 can not be opened, and when electromagnet coil 39 powers on, electromagnet 40 attracts armature 41, armature 41 is with brake control valve valve rod 45 pull-up, control chamber 48 is also communicated with low pressure oil way 72, thus on reduction needle-valve 56, end pressure makes needle-valve 56 open, and fuel oil starts to spray.When electromagnetic valve coil 39 power-off, control valve rod 45 to take a seat under the effect controlling valve rod Returnning spring 46, control chamber 48 and draining oil circuit disconnect, now oil holding slot 58 is identical with the fuel pressure in control chamber 48, under the effect of needle-valve Returnning spring 52, needle-valve 56 is taken a seat, oil sprayer end of injection.
When the solenoid valve of fuel regulator valve 2 break down cannot work time, draining oil circuit is in normally off, cannot open, and fuel oil constantly flows into oil sprayer by oil-feed oil circuit, cause Normally closed type heavy oil electronically controlled unit pump dead volume fuel pressure constantly to raise, may damage oil-fired system.Therefore this device fuel regulator valve 2 is designed with safety protection device.The fuel oil compression face of draining cone valve 29 is made up of jointly the first compression face A and the second compression face B.In traditional Normally closed type fuel regulator valve, these two compression face area equation, the hydraulic coupling that draining cone valve 29 is subject to is balance.The oil circuit at draining conical surface place is designed to stepped shaft by this device normal close type heavy oil fuel regulator valve, increases the area of the first compression face A, and make the area ratio of the area of itself and the second compression face B be greater than 1.2, the hydraulic coupling that draining cone valve 29 is subject to no longer balances.When fuel pressure increases to a certain degree; the difference of the pressure of the first compression face A and the second compression face B will make draining cone valve 29 open; draining oil circuit is opened; fuel oil flows back into low-pressure reservoir through draining oil circuit; intrasystem fuel pressure is reduced, protects the safety of fuel regulator valve and other hydraulic pressure installation.
When the fault solenoid valves 17 such as motor generation power down can not power on, draining cone valve 29 is in normally off, and the utility model still can continue oil spout function, can improve the reliability of electronically controlled unit pump, improves engine operation stability.Simultaneously, control to fuel feeding can be completed: when roller 7 driving pump oil piston 8 moves upward by mechanical type ratch plunger, after oil inlet hole 14 on the top edge closedown plunger guide bush of plunger 8, fuel oil in plunger cavity 16 starts pressurized, when plunger 8 continues to move upward, plunger 8 spiral chute opens spill port 15, and the fuel oil in plunger cavity 16 flows back to fuel tank through spill port 15.By pulling ratch 13, making gear ring 12 driven rotary pump oil piston 8, the time that plunger 8 spiral chute opens spill port 15 can be changed, to change fuel feeding finish time, and then completing the control to supply time and fuel delivery.
Normally closed type bivalve electronic control injection system of the present utility model works in heavy oil environment, during heavy oil normal temperature, viscosity is larger, need before work to heat it, so the electromagnet 20 of heavy oil and solenoid valve and armature 21 are kept apart by spacing block 23, avoid directly contacting with armature 21 from the High Temperature and Heavy Oil of control chamber earial drainage and the electromagnet 20 of solenoid valve, thus ensure the work that solenoid valve can be safe and reliable.Meanwhile, be processed with draining ring 24 in spacing block 23, solenoid valve spring seat 26 is processed with return port 25, effect is that low pressure oil pocket is returned in the heavy oil drainage of entering from coupling sleeve 27 and spacing block 23 clearance leakage, prevents it from leaking into armature 21 part.Spacing block 23 can also play the position-limiting action to controlling valve rod lift.Electromagnetic valve body 17 also machined the first cooling oil path 18, can cooling lubricating oil be introduced, thus reduce the temperature of electromagnet 20 and armature 21; The introducing of cooling lubricating oil can also reduce the shock and vibration of armature 21, increases the stability of electromagnetic valve work.Equally, electric-controlled fuel injector also can make the higher heavy oil of temperature directly contact solenoid valve in draining process, makes electromagnet 40 and armature 41 expanded by heating, can corrode solenoid valve, cause solenoid valve cisco unity malfunction.So devise spacing block 43, High Temperature and Heavy Oil and electromagnet 40 and armature 41 are separated.Be processed with draining ring 44 in spacing block 43, the heavy oil drainage of leaking in the gap from control valve valve rod 45 and spacing block 43 can be returned low pressure oil way 72, prevent its corrosion electromagnet 40 and armature 41.Meanwhile, electromagnetic valve body 38 top is processed with the second cooling oil path 37, introduces the shock and vibration that cooling lubricating oil reduces armature 41 motion, reduces the temperature of electromagnet 40 and armature 41 simultaneously, add the stability of oil sprayer end electromagnetic valve work.
The utility model Normally closed type heavy oil bivalve electronic control injection system, comprises Normally closed type heavy oil single valve electronically controlled unit pump, high-pressure oil pipe and heavy oil electric-controlled fuel injector.Wherein, Normally closed type heavy oil single valve electronically controlled unit pump comprises roller plunger, fuel regulator valve and outlet valve three part.Roller plunger comprises driving cam, roller, pump oil piston, piston spring seat, plunger return spring, plunger housing, gear ring, ratch and the pump housing.Driving cam is arranged on roller lower end, roller is arranged on the lower end of plunger housing, piston spring is enclosed within outside plunger, the lower end of piston spring is positioned in plunger housing, withstand on spring seat, the upper end of piston spring withstands on pump housing lower end, the top of pump oil piston is positioned at the pump housing, bottom is positioned at plunger housing, plunger cavity is formed between pump oil piston and the inwall of the pump housing, its upper end sidewall is arranged the spiral chute controlling spill port opening and closing, enclosure interior is provided with ratch, the gear ring matched with ratch is installed outside plunger bushing, in the pump housing, oil inlet hole is set respectively, spill port and the first oil circuit 75, the top of plunger cavity is provided with fuel regulator valve, comprises electromagnetic valve body, the first cooling oil path, coil, electromagnet fixed core, armature, solenoid valve valve rod, cushion block, spacing block, draining ring, return port, solenoid valve spring seat, coupling sleeve, solenoid valve spring, draining cone valve, oil drain valve valve rod, oil drain valve spring and cover plate.Electromagnetic valve body and cushion block are arranged in juxtaposition, and draining cone valve, draining cone valve valve rod are arranged on pump body.Armature is connected with coupling sleeve left end by solenoid valve valve rod, and coupling sleeve right-hand member is connected with draining cone valve.The pump housing that the tapered end face of draining cone valve is other with it coordinates formation control valve.Be processed with the first cooling oil path in electromagnetic valve body, this cooling oil path, through electromagnet core and coil, is communicated with chamber, armature place.Spacing block, between armature and solenoid valve spring seat, is threaded connection and is fixed on cushion block, spacing block is processed with draining ring, and solenoid valve spring seat is processed with return port, and draining ring is connected with return port, and return port is connected with chamber, solenoid valve spring place.Chamber, solenoid valve spring place is communicated with spill port, and draining cone valve valve rod left end connects draining cone valve, and right-hand member connects draining cone valve spring, and draining cone valve valve rod intersects mutually with the second oil circuit 76; Outlet valve is arranged on pump housing top, is made up of oil outlet valve spring and high-pressure oil pipe connection mouth, and the second oil circuit 76 is connected with high-pressure oil pipe connection mouth by oil outlet valve spring.High-pressure oil pipe is connected outlet valve and heavy oil electric-controlled fuel injector with high-pressure oil pipe joint.Heavy oil electric-controlled fuel injector comprises solenoid valve part, control piston, control cavity, oil nozzle and oil injector body.Solenoid valve part is primarily of compositions such as electromagnetic valve body, coil, electromagnet, armature, control valve rod, stop ring, spacing block, seal valve bases, electromagnetic valve body top is processed with the second cooling oil path, the one end controlling valve rod is stuck on armature by stop ring, and the other end is connected to seal valve base through the spacing block below armature.Control cavity below seal valve base and control piston formation control chamber.Oil nozzle mainly comprises needle-valve, needle-valve Returnning spring, spring pedestal, spacing orifice plate, injector valve base etc.Control piston and needle-valve Returnning spring by spring pedestal by needle valve pressed to injector valve base.Form oil holding slot between needle-valve and injector valve base, oil holding slot is connected with the oil-feed oil circuit of spacing orifice plate.
Fuel regulator valve is Normally closed type, is closed condition when not powering on, and draining cone valve cuts out draining oil circuit.Fuel oil in pump oil piston compression plunger chamber, high-pressure oil flow is to outlet valve.When fuel pressure is greater than the pretightening force of oil outlet valve spring, fuel oil flows into heavy oil electric-controlled fuel injector through high-pressure oil pipe.When solenoid valve powers on, fuel regulator valve is opened, and draining oil circuit opened by draining cone valve, and the High Temperature and Heavy Oil through pressurization flows back into low pressure oil way through draining cone valve, and fuel feeding terminates.Electric-controlled fuel injector solenoid valve is closed condition when not powering on, and the hydraulic coupling that needle-valve upper end is subject to is higher than lower end, and needle-valve can not be opened.When solenoid valve powers on, electric-controlled fuel injector solenoid valve is opened, and the high pressure fuel of needle-valve upper end is communicated with low pressure oil way, and needle-valve lifts, and fuel oil starts to spray.By adjusting the Control timing sequence of high pressure oil pump solenoid valve and electric-controlled fuel injector solenoid valve flexibly, different control modes can be obtained.
The utility model can also comprise:
1. in the part that draining cone valve valve rod intersects with the second oil circuit 76, draining cone valve side arranges the first compression face A, and draining cone valve spring side arranges the second compression face B, and the area of the first compression face A is not less than 1.2 times of the second compression face B area.The utility model provides a kind of Normally closed type heavy oil bivalve electronic control injection system, is made up of Normally closed type heavy oil single valve electronically controlled unit pump, high-pressure oil pipe and heavy oil electric-controlled fuel injector three parts.Wherein Normally closed type heavy oil single valve electronically controlled unit pump comprises roller plunger, fuel regulator valve and outlet valve three part.High-pressure oil pipe is connected outlet valve and heavy oil electric-controlled fuel injector with high-pressure oil pipe joint.Heavy oil electric-controlled fuel injector is made up of electric-controlled fuel injector solenoid valve and oil nozzle part.Fuel regulator valve is closed condition when not powering on, and draining cone valve cuts out draining oil circuit.Fuel oil in pump oil piston compression plunger chamber, high-pressure oil flow is to outlet valve, and fuel oil flows into heavy oil electric-controlled fuel injector from outlet valve through high-pressure oil pipe.When high pressure oil pump solenoid valve powers on, fuel regulator valve is opened, and draining oil circuit opened by draining cone valve, and the High Temperature and Heavy Oil through pressurization flows back into low pressure oil way through draining cone valve, and fuel feeding terminates.Electric-controlled fuel injector solenoid valve is closed condition when not powering on, and the hydraulic coupling that needle-valve upper end is subject to is higher than lower end, and needle-valve can not be opened.When solenoid valve powers on, electric-controlled fuel injector solenoid valve is opened, and the high pressure fuel of needle-valve upper end is communicated with low pressure oil way, and needle-valve lifts, and fuel oil starts to spray.By adjusting the Control timing sequence of high pressure oil pump solenoid valve and electric-controlled fuel injector solenoid valve flexibly, different control modes can be obtained.Owing to needing heating before heavy oil work, high pressure oil pump solenoid valve and the spacing block in electric-controlled fuel injector solenoid valve avoid the electromagnet of the too high heavy oil of temperature and solenoid valve, armature contacts, and prevent solenoid valve to be corroded, the work that guarantee solenoid valve can be safe and reliable; And electromagnetic valve body top is processed with cooling oil path, cold oil can be introduced and cooled to make solenoid valve inside, the shock and vibration of armature can also be reduced, increase the stability of electromagnetic valve work, and then improve the reliability of bivalve electronic control injection system
The utility model comprises Normally closed type heavy oil single valve electronically controlled unit pump, high-pressure oil pipe and heavy oil electric-controlled fuel injector three parts.Wherein Normally closed type heavy oil single valve electronically controlled unit pump comprises roller plunger, fuel regulator valve and outlet valve three part.High-pressure oil pipe is connected outlet valve and heavy oil electric-controlled fuel injector with high-pressure oil pipe joint.Heavy oil electric-controlled fuel injector is made up of electric-controlled fuel injector solenoid valve part and oil nozzle part.
Spacing block, between armature and solenoid valve spring seat, is threaded connection and is fixed on cushion block, spacing block is processed with draining ring, and solenoid valve spring seat is processed with return port, and draining ring is connected with return port, and return port is connected with chamber, solenoid valve spring place.Be processed with the first cooling oil path in electromagnetic valve body, can introduce cooling lubricating oil, this cooling oil path, through electromagnet core and coil, is communicated with chamber, armature place.
In the part that draining cone valve valve rod intersects with the second oil circuit 76, draining cone valve side arranges the first compression face A, and draining cone valve spring side arranges the second compression face B, and the area of the first compression face A is not less than 1.2 times of the second compression face B area.
Spacing block is threaded connection and is fixed on oil injector body, between armature and seal valve base.Spacing block is processed with draining ring, and draining ring is connected with low pressure oil way.Electromagnetic valve body is processed with the second cooling oil path, can introduces cold oil, this cooling oil path, through electromagnet core and coil, is communicated with chamber, armature place.
Claims (2)
1. Normally closed type heavy oil bivalve electronic control injection system, it is characterized in that: comprise Normally closed type heavy oil single valve electronically controlled unit pump, high-pressure oil pipe and heavy oil electric-controlled fuel injector, described Normally closed type heavy oil single valve electronically controlled unit pump comprises roller plunger, fuel regulator valve and outlet valve three part, described roller plunger comprises driving cam, roller, pump oil piston, piston spring seat, piston spring, plunger housing, gear ring, ratch and the pump housing, described roller is arranged on the lower end of plunger housing, and driving cam coordinates with roller, and the upper end of plunger is positioned in the pump housing, lower end withstands on bottom plunger housing, piston spring is enclosed within outside plunger, the lower end of piston spring to be positioned in plunger housing and to withstand on spring seat, the upper end of piston spring withstands on pump housing lower end, form plunger cavity between plunger and the inwall of the pump housing, its upper end sidewall is arranged the spiral chute controlling spill port opening and closing, enclosure interior is provided with ratch, the gear ring matched with ratch is installed outside plunger bushing, the pump housing arranges oil inlet hole respectively, spill port, first oil circuit, oil inlet hole is connected with plunger cavity, and described fuel regulator valve is arranged on the top of the pump housing and comprises the first electromagnetic valve body, cushion block, first coil, electromagnet fixed core, first armature, solenoid valve valve rod, first spacing block, solenoid valve spring, oil drain valve valve rod, draining cone valve and cover plate, cushion block and the first electromagnetic valve body are arranged in juxtaposition, draining cone valve, draining cone valve valve rod is arranged in the pump housing, and the first armature connects draining cone valve valve rod by solenoid valve valve rod, and one end and the cover plate of draining cone valve are connected, the pump housing that the tapered end face of the other end is other with it coordinates, draining cone valve valve rod is also connected with the tapered end of draining cone valve, the first cooling oil path is processed with in electromagnetic valve body, first cooling oil path to be communicated with chamber, armature place with coil through electromagnet fixed core, first spacing block is between armature and solenoid valve spring seat and be threaded connection and be arranged on cushion block, first spacing block is processed with draining ring, solenoid valve spring seat is processed with return port, draining ring is connected with return port, return port is connected with chamber, solenoid valve spring place, chamber, solenoid valve spring place is communicated with described spill port by the first oil circuit, and draining cone valve valve rod left end connects draining cone valve, right-hand member connects draining cone valve spring, and draining cone valve valve rod intersects mutually with the second oil circuit, and the second oil circuit is communicated with oil inlet hole by plunger cavity, described outlet valve is arranged on pump housing top, and described outlet valve comprises the high-pressure oil pipe connection mouth and oil outlet valve spring arranged up and down, and the second oil circuit connects high-pressure oil pipe connection mouth by oil outlet valve spring, described heavy oil electric-controlled fuel injector comprises solenoid valve part and oil nozzle part, described solenoid valve part comprises the second electromagnetic valve body, oil injector body, second coil, second electromagnet, second armature, control valve rod, stop ring, second spacing block, seal valve base, high-pressure oil pipe joint, second coil and the second electromagnet are arranged in the second electromagnetic valve body, second armature is positioned at below the second electromagnet, second spacing block to be positioned at below the second armature and to be threaded connection and is fixed on oil injector body, second electromagnetic valve body top is processed with the second cooling oil path, the one end controlling valve rod is stuck on the second armature by stop ring, the other end passes the second spacing block below the second armature and is connected with seal valve base, second spacing block is arranged the second draining ring, oil nozzle part comprises needle-valve, needle-valve Returnning spring, spring pedestal, spacing orifice plate, injector valve base, control piston, control piston and needle-valve Returnning spring by spring pedestal by needle valve pressed to injector valve base, oil holding slot is formed between needle-valve and injector valve base, oil injector body is provided with the first oil-feed oil circuit, one end of first oil-feed oil circuit is communicated with high-pressure oil pipe by high-pressure oil pipe joint, the other end of the first oil circuit is connected with the second oil-feed oil circuit be arranged on spacing orifice plate, the end of the second oil circuit is connected with the 3rd oil-feed oil circuit be arranged on injector valve base, the end of the 3rd oil-feed oil circuit is communicated with oil holding slot, control cavity below described seal valve base and control piston formation control chamber, control chamber communicates with the first oil-feed oil circuit, the two ends of described high-pressure oil pipe are connected with the high-pressure oil pipe connection mouth of outlet valve and the high-pressure oil pipe joint of solenoid valve part respectively.
2. Normally closed type heavy oil bivalve electronic control injection system according to claim 1, it is characterized in that: the part that draining cone valve valve rod intersects with the second oil circuit arranges the first compression face and the second compression face respectively, first compression face and the second compression face lay respectively at draining cone valve side and the draining cone valve spring side of the second oil circuit, and the area of the first compression face is not less than 1.2 times of the second compression face area.
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| CN201520949851.0U CN205207025U (en) | 2015-11-25 | 2015-11-25 | Normal close formula is bivalve electronic control fuel injection system for heavy oil |
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| CN201520949851.0U CN205207025U (en) | 2015-11-25 | 2015-11-25 | Normal close formula is bivalve electronic control fuel injection system for heavy oil |
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| CN205207025U true CN205207025U (en) | 2016-05-04 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105332833A (en) * | 2015-11-25 | 2016-02-17 | 哈尔滨工程大学 | Normally-closed bivalve electronic-controlled fuel injection system for heavy oil |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105332833A (en) * | 2015-11-25 | 2016-02-17 | 哈尔滨工程大学 | Normally-closed bivalve electronic-controlled fuel injection system for heavy oil |
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