CN110594061B - Electric control common rail type heavy oil injector - Google Patents
Electric control common rail type heavy oil injector Download PDFInfo
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- CN110594061B CN110594061B CN201910915177.7A CN201910915177A CN110594061B CN 110594061 B CN110594061 B CN 110594061B CN 201910915177 A CN201910915177 A CN 201910915177A CN 110594061 B CN110594061 B CN 110594061B
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- oil
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- needle valve
- hole
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- 239000000295 fuel oil Substances 0.000 title claims abstract description 68
- 239000003921 oil Substances 0.000 claims abstract description 194
- 238000007789 sealing Methods 0.000 claims abstract description 44
- 238000001816 cooling Methods 0.000 claims abstract description 42
- 239000010724 circulating oil Substances 0.000 claims description 19
- 229910000831 Steel Inorganic materials 0.000 claims description 18
- 239000010959 steel Substances 0.000 claims description 18
- 239000007921 spray Substances 0.000 claims description 11
- 238000003801 milling Methods 0.000 claims description 10
- 238000005507 spraying Methods 0.000 claims description 8
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 6
- 230000006835 compression Effects 0.000 claims description 5
- 238000007906 compression Methods 0.000 claims description 5
- 238000009434 installation Methods 0.000 claims description 5
- 230000001105 regulatory effect Effects 0.000 claims description 5
- 238000000034 method Methods 0.000 claims description 4
- 229910052742 iron Inorganic materials 0.000 claims description 2
- 239000000446 fuel Substances 0.000 abstract description 23
- 238000005260 corrosion Methods 0.000 abstract description 5
- 230000007797 corrosion Effects 0.000 abstract description 5
- 230000003068 static effect Effects 0.000 abstract description 3
- 230000003685 thermal hair damage Effects 0.000 abstract description 3
- 238000002347 injection Methods 0.000 description 11
- 239000007924 injection Substances 0.000 description 11
- 230000009471 action Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 238000002485 combustion reaction Methods 0.000 description 3
- 230000006378 damage Effects 0.000 description 3
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- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000000227 grinding Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 239000003779 heat-resistant material Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
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- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 239000002912 waste gas Substances 0.000 description 1
Images
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M53/00—Fuel-injection apparatus characterised by having heating, cooling or thermally-insulating means
- F02M53/04—Injectors with heating, cooling, or thermally-insulating means
- F02M53/043—Injectors with heating, cooling, or thermally-insulating means with cooling means other than air cooling
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M47/00—Fuel-injection apparatus operated cyclically with fuel-injection valves actuated by fluid pressure
- F02M47/02—Fuel-injection apparatus operated cyclically with fuel-injection valves actuated by fluid pressure of accumulator-injector type, i.e. having fuel pressure of accumulator tending to open, and fuel pressure in other chamber tending to close, injection valves and having means for periodically releasing that closing pressure
- F02M47/025—Hydraulically actuated valves draining the chamber to release the closing pressure
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M51/00—Fuel-injection apparatus characterised by being operated electrically
- F02M51/06—Injectors peculiar thereto with means directly operating the valve needle
- F02M51/061—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means
- F02M51/0614—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of electromagnets or fixed armature
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
- F02M61/04—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00 having valves, e.g. having a plurality of valves in series
- F02M61/10—Other injectors with elongated valve bodies, i.e. of needle-valve type
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
- F02M61/16—Details not provided for in, or of interest apart from, the apparatus of groups F02M61/02 - F02M61/14
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
- F02M61/16—Details not provided for in, or of interest apart from, the apparatus of groups F02M61/02 - F02M61/14
- F02M61/18—Injection nozzles, e.g. having valve seats; Details of valve member seated ends, not otherwise provided for
- F02M61/1806—Injection nozzles, e.g. having valve seats; Details of valve member seated ends, not otherwise provided for characterised by the arrangement of discharge orifices, e.g. orientation or size
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
- F02M61/16—Details not provided for in, or of interest apart from, the apparatus of groups F02M61/02 - F02M61/14
- F02M61/18—Injection nozzles, e.g. having valve seats; Details of valve member seated ends, not otherwise provided for
- F02M61/1806—Injection nozzles, e.g. having valve seats; Details of valve member seated ends, not otherwise provided for characterised by the arrangement of discharge orifices, e.g. orientation or size
- F02M61/182—Discharge orifices being situated in different transversal planes with respect to valve member direction of movement
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
- F02M61/16—Details not provided for in, or of interest apart from, the apparatus of groups F02M61/02 - F02M61/14
- F02M61/18—Injection nozzles, e.g. having valve seats; Details of valve member seated ends, not otherwise provided for
- F02M61/1886—Details of valve seats not covered by groups F02M61/1866 - F02M61/188
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
- F02M61/16—Details not provided for in, or of interest apart from, the apparatus of groups F02M61/02 - F02M61/14
- F02M61/18—Injection nozzles, e.g. having valve seats; Details of valve member seated ends, not otherwise provided for
- F02M61/1893—Details of valve member ends not covered by groups F02M61/1866 - F02M61/188
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M63/00—Other fuel-injection apparatus having pertinent characteristics not provided for in groups F02M39/00 - F02M57/00 or F02M67/00; Details, component parts, or accessories of fuel-injection apparatus, not provided for in, or of interest apart from, the apparatus of groups F02M39/00 - F02M61/00 or F02M67/00; Combination of fuel pump with other devices, e.g. lubricating oil pump
- F02M63/0012—Valves
- F02M63/0014—Valves characterised by the valve actuating means
- F02M63/0015—Valves characterised by the valve actuating means electrical, e.g. using solenoid
- F02M63/0017—Valves characterised by the valve actuating means electrical, e.g. using solenoid using electromagnetic operating means
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M63/00—Other fuel-injection apparatus having pertinent characteristics not provided for in groups F02M39/00 - F02M57/00 or F02M67/00; Details, component parts, or accessories of fuel-injection apparatus, not provided for in, or of interest apart from, the apparatus of groups F02M39/00 - F02M61/00 or F02M67/00; Combination of fuel pump with other devices, e.g. lubricating oil pump
- F02M63/0012—Valves
- F02M63/0031—Valves characterized by the type of valves, e.g. special valve member details, valve seat details, valve housing details
- F02M63/0033—Lift valves, i.e. having a valve member that moves perpendicularly to the plane of the valve seat
- F02M63/0036—Lift valves, i.e. having a valve member that moves perpendicularly to the plane of the valve seat with spherical or partly spherical shaped valve member ends
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
- F02M2200/03—Fuel-injection apparatus having means for reducing or avoiding stress, e.g. the stress caused by mechanical force, by fluid pressure or by temperature variations
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
- F02M2200/05—Fuel-injection apparatus having means for preventing corrosion
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M65/00—Testing fuel-injection apparatus, e.g. testing injection timing ; Cleaning of fuel-injection apparatus
- F02M65/007—Cleaning
- F02M65/008—Cleaning of injectors only
Abstract
The invention discloses an electric control common rail type heavy oil injector, which comprises: the fuel injector comprises a fuel injector body, an electro-hydraulic control component and a nozzle component. The middle part of the outer side of the guide sleeve in the electro-hydraulic control component is provided with a ring groove, the middle part of the groove is provided with a transverse through hole which is directly communicated with a middle hole of the guide sleeve, and two sides of the ring groove are provided with sealing rings to divide the interior of the oil sprayer into three chambers. Three ring grooves are formed in the guide section of the control valve core, and the second ring groove is communicated with the transverse through hole in the middle of the guide sleeve. The electromagnetic element is contacted with cooling oil, and the cooling oil way is isolated from the fuel oil way in a dynamic sealing, static sealing and drainage mode, so that the corrosion and thermal damage of heavy oil to the electronic element can be effectively avoided; the middle of the top end of the metering orifice plate is provided with a sinking groove, and the ball valve seat guide sleeve can be sleeved into the sinking groove of the metering orifice plate and is in clearance fit with the ball valve seat, so that the ball valve seat has certain guiding capacity for axial movement of the ball valve seat.
Description
Technical Field
The invention relates to a high-pressure common rail engine, in particular to an electric control common rail type oil injector.
Background
With the increasing transportation cost of shipping enterprises, engines using heavy oil (combustible fuel oil of poor quality) as fuel oil have unique advantages in cost reduction. Heavy oil has certain corrosivity to the spare part because its impurity is many, easily produces the viscosity, also has certain corrosivity to electronic component, and heavy oil stickness is big simultaneously, needs high temperature heating during the use, and too high oil temperature can lead to electronic component life-span to shorten. How to improve the problem is an important hotspot for prolonging the service life of the heavy oil diesel engine.
In the prior art, the exhaust valve of the low-speed diesel engine needs hydraulic drive, and a servo oil duct special for conveying oil for driving is designed, so that heavy oil fuel oil is injected by additionally adding a servo oil driver outside the oil injector to carry out remote hydraulic control on the oil injector. The application of the servo oil prevents the heavy oil from contacting with the electronic element, however, the pressure of the servo oil is much lower than that of fuel oil, and the volume of a pressurization structure in the servo oil driver is large, so that the external servo oil driver occupies a large space and is difficult to arrange in space. Therefore, a plurality of oil injectors on the same cylinder can only share one servo oil driver, so that fuel oil injection among the oil injectors cannot be independent and interference exists. Meanwhile, the movement of the exhaust valve causes the pressure fluctuation of the servo oil, so that the working response of a servo oil driver is influenced, and the consistency of each injection of the oil injector is indirectly influenced. Furthermore, the servo oil driver needs to be arranged at a far position of the oil injector due to the overlarge volume, and therefore delay in control is large.
The electric control common rail fuel oil system is a fuel oil injection system based on mechanical, hydraulic and electric technologies. The system adopts a common rail pipe with a certain volume arranged between an oil supply pump and an oil injector to accumulate fuel oil so as to suppress pressure fluctuation, the fuel oil is conveyed to each oil injector through an oil pipe, and the opening and closing of the oil injector are controlled by the action of an electromagnetic valve of the oil injector. The system has the advantages of stable oil injection pressure, controllable oil injection pressure and oil injection process and the like. Therefore, the research on the novel electric control common rail type heavy oil injector which can place the electromagnetic element in the injector and can reduce the pollution of high temperature and heavy oil has important significance.
Disclosure of Invention
The invention provides an electric control common rail type heavy oil injector, wherein an electromagnetic element is arranged in the injector, the heat damage of the electronic element is effectively avoided by designing a forced cooling structure, meanwhile, the cooling oil is prevented from being polluted by heavy oil by designing an oil sealing structure, the corrosion of the heavy oil on the electromagnetic element is prevented, and the installation space is saved.
The technical scheme of the invention is as follows:
an electrically controlled common rail heavy oil injector comprising: the fuel injector comprises a fuel injector body, an electro-hydraulic control component and a nozzle component.
The middle of the top end of an oil sprayer body of the oil sprayer is provided with an electronic interface, the top end is circumferentially provided with an oil inlet interface, a circulating oil interface, a cooling oil inlet interface, a cooling oil outlet interface, an oil return interface and a mixed oil interface, and the interfaces are respectively connected with an electromagnet wire end, an oil inlet channel, a circulating oil channel, a cooling oil inlet channel, a cooling oil return channel, a fuel oil return channel and a mixed oil discharge channel.
The electro-hydraulic control component comprises an electromagnet, a control valve return spring, an armature, a sleeve, a guide sleeve, a control valve core, a ball valve seat guide sleeve, a ball valve seat, a steel ball and a metering orifice plate; the metering orifice plate is arranged between the oil sprayer body and the nozzle component, and an oil inlet metering orifice and an oil outlet metering orifice are arranged in the metering orifice plate; the control valve core is matched with the guide sleeve by a matching part, and a middle hole of the guide sleeve can guide the control valve core to axially slide; the ball valve seat is arranged in the ball valve seat guide sleeve; the electromagnet, the sleeve, the guide sleeve and the ball valve seat guide sleeve are sequentially assembled in a central hole of the oil sprayer body from top to bottom and are tightly pressed on the metering orifice plate by a compression nut; the control valve core, the ball valve seat and the steel ball are contacted in sequence, and a control valve return spring positioned in the middle hole of the electromagnet is tightly pressed on the sealing conical surface of the metering orifice plate to block the oil outlet metering orifice; the guide sleeve is sealed by installing sealing rings in two sealing ring grooves on the outer side.
The middle of the top end of the orifice plate is provided with a sinking groove, and the ball valve seat guide sleeve is sleeved in the sinking groove; the upper half section of the opening of the middle hole of the ball valve seat guide sleeve is larger than the lower half section, and the lower half section is in clearance fit with the ball valve seat and has certain guiding capacity for axial movement of the ball valve seat. The top end of the ball valve seat guide sleeve is provided with a cross milling groove, and three milling grooves are uniformly distributed on the guide surface of the ball valve seat. And the cavity above the steel ball is communicated with the fuel oil return passage through the milling grooves on the ball valve seat and the ball valve seat guide sleeve. .
And the circulating oil duct and the oil inlet duct are led into the nozzle component through the oil injector body and the metering orifice plate.
Furthermore, the nozzle component comprises a needle valve guide sleeve, a needle valve reset spring, a pressure regulating gasket, a device body tightening cap, a needle valve body, a nozzle locking nut and a nozzle; the needle valve guide sleeve and the needle valve are matched with the needle valve body as matching parts, and the upper sliding surface and the lower sliding surface of the needle valve can respectively axially slide in the middle hole of the needle valve body and the middle hole of the needle valve guide sleeve; two ends of the needle valve reset spring respectively press the needle valve guide sleeve and the needle valve, so that the top end of the needle valve guide sleeve is tightly pressed on the lower plane of the orifice plate, and the conical surface at the lower end of the needle valve abuts against the conical surface of the middle hole of the needle valve body; the cylindrical surface of the bottom end of the needle valve body is in interference fit with a nozzle counter bore, and a spray hole is formed in the nozzle and used for spraying fuel oil; the injector tightening cap connects the nozzle component to the injector body and causes the top end face of the needle valve body to be tightly pressed on the bottom end of the orifice plate; and the circulating oil duct and the oil inlet duct are led into the middle hole of the needle valve body through the oil injector body and the metering orifice plate.
Furthermore, the metering orifice plate, the needle valve guide sleeve and the needle valve are surrounded to form a pressure control chamber and are communicated with the outside through the oil inlet metering orifice and the oil outlet metering orifice; the fuel oil return passage is arranged on the fuel injector body and is separated from the fuel outlet metering orifice by a steel ball; the mixed oil discharge channel is communicated with an annular cavity formed by the annular groove in the middle of the guide sleeve and the sealing ring; the cooling oil inlet channel and the cooling oil return channel are communicated with an oil cavity formed by the electromagnet, the guide sleeve and the sealing ring and are communicated with each other through a slotted hole on the sleeve.
Further, the nozzle comprises a nozzle body and a mandril matched with the nozzle body; the nozzle body is arranged on the needle valve body in an interference manner, and the ejector rod is rigidly connected to the head of the needle valve or is processed into a whole with the head of the needle valve; an upper close matching surface and a lower close matching surface are arranged between the nozzle body and the ejector rod matched with the nozzle body, an oil cavity between the nozzle body and the ejector rod is divided into an upper nozzle cavity, a middle nozzle cavity and a lower nozzle cavity, the ejector rod is provided with a central longitudinal hole and a transverse hole, the upper nozzle cavity is communicated with the lower nozzle cavity, and a spray hole in the nozzle body is positioned in the width range of the middle nozzle cavity; when the oil sprayer is in a spraying state, the nozzle body and the lower close-fitting surface of the ejector rod are staggered, so that the lower nozzle cavity is communicated with the middle nozzle cavity, and when the oil sprayer is in a spraying stopping state, the nozzle body and the lower close-fitting surface of the ejector rod are mutually attached, so that the lower nozzle cavity is disconnected with the middle nozzle cavity.
The length of the nozzle is more than or equal to 19 mm.
The nozzle locking nut is sleeved outside the part where the needle valve body is combined with the nozzle body, the upper end of the nozzle locking nut is in threaded connection with the needle valve body, the needle valve body and the nozzle body are tightly sleeved on the inner wall of the tightening cap, and the taper angle and the thickness of the lower end of the tightening cap are designed to be matched with the taper angle of the mounting seat surface and the length of the nozzle extending into the cylinder, which are required by the oil sprayer.
Furthermore, the outer side of the middle part of the guide sleeve is provided with a ring groove, and the middle part of the ring groove is provided with a transverse through hole which is directly communicated with the middle hole of the guide sleeve; sealing ring grooves are arranged on two sides of the ring groove; the diameter of the bottom end of the control valve core is larger than that of the guide section, three ring grooves are formed in the guide section, and the second ring groove is communicated with the transverse through hole in the middle of the guide sleeve. The control valve core, the guide sleeve and the sealing ring divide a central hole of the oil injector body into three chambers.
The beneficial technical effects of the invention are as follows:
1) the electromagnetic element is directly designed into the oil sprayer, a servo oil driver of an old heavy oil fuel oil system is omitted, the space is saved, the working rule of a single oil sprayer can be changed at any time by using an electric control system, and different oil sprayers are not influenced mutually.
2) The interior of the oil injector body is divided into three chambers through an electro-hydraulic control component, an electromagnetic element is directly contacted with cooling oil, and a cooling oil path is isolated from a fuel oil path through a dynamic sealing mode, a static sealing mode and a drainage mode. The technical scheme disclosed by the invention can be applied to a high-pressure common rail system taking heavy oil as fuel oil, and can effectively avoid the corrosion and thermal damage of the heavy oil to electromagnetic elements.
3) The electro-hydraulic control component adopts a ball valve as a control valve, and has better self-alignment. The middle of the top end of the orifice plate is provided with a sinking groove for installing the ball valve seat guide sleeve so as to install the ball valve seat guide sleeve. The guide sleeve has certain guiding capacity for axial movement of the ball valve seat, so that the lateral deviation of the steel ball caused by the inclined installation angle of the oil sprayer is prevented, and the working stability is further improved. Meanwhile, the ball valve seat guide sleeve and the ball valve seat can be directly taken down from the metering orifice plate as a single piece, and the matching grinding and damaged replacement can be conveniently carried out due to the requirement of adjusting the lift of the control valve of the oil injector.
4) By adopting the improved nozzle structure, the seal seat surface of the oil injector needle valve can be far away from gas and high-temperature environment, the damage of the high-temperature environment and poor-quality fuel to the seal seat surface of the oil injector needle valve can be effectively reduced, and the installation space is saved. Meanwhile, the nozzle is divided into three cavities by two close matching surfaces of the nozzle and the ejector rod, and the matching reduces the volume of the cavity in the nozzle, thereby reducing the oil dripping phenomenon and further reducing the influence of insufficient combustion on the service life of the low-speed diesel engine. And because the design of the upper, middle and lower three cavities of the oil nozzle, the spray hole on the nozzle body can be positioned in the width range of the middle cavity of the nozzle, so that the space of the design position of the oil spray hole is larger, and the oil nozzle has certain modification potential for manufacturers, and is convenient to modify and apply to low-speed diesel injectors in other forms.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic diagram of the electrical and hydraulic interface of the present invention;
FIGS. 3 and 3a are enlarged views of the ball seat and ball guide sleeve of the present invention;
FIG. 4 is a schematic view of a nozzle member of the present invention;
FIGS. 5 and 5a are schematic views of electro-hydraulic control components of the present invention;
FIG. 6 is a schematic view of the cooling structure of the present invention;
FIG. 7 is a schematic view of a cooling oil contamination prevention structure of the present invention;
fig. 8 is a schematic structural view of a nozzle portion of the present invention.
Wherein, 1-an oil injector body, 2-a compression nut, 3-an electromagnet, 4-a control valve reset spring, 5-a nut, 6-an armature, 7-a sleeve, 8-a guide sleeve, 9-a control valve core, 10-a sealing ring, 11-a ball valve seat guide sleeve, 12-a ball valve seat, 13-a steel ball, 14-a metering orifice plate, 15-a needle valve guide sleeve, 16-a needle valve, 17-a needle valve reset spring, 18-a pressure regulating gasket, 19-an injector body tightening cap, 20-a needle valve body, 21-a nozzle locking nut, 22-a nozzle, 23-an electronic interface, 24-an oil inlet interface, 25-a circulating oil interface, 26-a cooling oil inlet interface, 27-a cooling oil outlet interface, 28-an oil return interface, 29-a mixed oil interface, a cooling oil outlet interface, 101-circulating oil channel, 102-oil inlet channel, 103-oil inlet hole, 104-pressure control chamber, 105-oil outlet hole, 106-fuel oil return channel, 107-mixed oil discharge channel, 108-cooling oil inlet channel, 109-cooling oil return channel, 110-guide sleeve ring groove, 111-valve core ring groove, 221-ejector rod, 222-nozzle body.
Detailed Description
The present invention is described in detail below with reference to the attached drawings.
Fig. 1 shows an electrically controlled common rail type heavy oil injector with a specific structure, which includes: the fuel injector comprises a fuel injector body, an electro-hydraulic control component and a nozzle component.
As can be seen by combining fig. 1 and fig. 2, an electronic interface (23) is arranged in the middle of the top end of an injector body (1) of the injector, and an oil inlet interface (24), a circulating oil interface (25), a cooling oil inlet interface (26), a cooling oil outlet interface (27), an oil return interface (28) and a mixed oil interface (29) are circumferentially arranged at the top end of the injector body and are respectively connected with an electric wire end of an electromagnet (3), an oil inlet duct (102), a circulating oil duct (101), a cooling oil inlet duct (108), a cooling oil return duct (109), a fuel oil return duct (106) and a mixed oil discharge duct (107).
The structure of the electro-hydraulic control component can be seen by combining the figures 1, 5, 6 and 7, and comprises a compression nut (2), an electromagnet (3), a control valve return spring (4), a nut (5), an armature (6), a sleeve (7), a guide sleeve (8), a control valve core (9), a sealing ring (10), a ball valve seat guide sleeve (11), a ball valve seat (12), a steel ball (13) and a metering orifice plate (14). The metering orifice plate (14) is positioned between the oil injector body (1) and the nozzle component, an oil inlet metering orifice (103) and an oil outlet metering orifice (105) are arranged in the metering orifice plate, and the lower end of the metering orifice plate is contacted with the nozzle component. The control valve core (9) is matched with the guide sleeve (8) as a matching part, and the center hole of the guide sleeve (8) can guide the control valve core (9) to axially slide. The ball seat (12) is arranged in a ball seat guide sleeve (11). The electromagnet (3), the sleeve (7), the guide sleeve (8) and the ball valve seat guide sleeve (11) are sequentially assembled in a central hole of the oil sprayer body (1) and are tightly pressed on the metering orifice plate (14) by the compression nut (2). The armature iron (6) and the top thread of the control valve core (9) are fixed by a nut (5). The control valve core (9), the ball valve seat (12) and the steel ball (13) are sequentially contacted, and a control valve return spring (4) positioned in a middle hole of the electromagnet (3) is tightly pressed on a sealing conical surface of the metering orifice plate (14) to block the oil outlet metering orifice (105); the sealing ring (10) is sleeved in the sealing ring groove at the outer side of the guide sleeve (8).
Referring to fig. 1 and 4, the nozzle member needle guide sleeve (15), the needle (16), the needle return spring (17), the pressure regulating gasket (18), the body tightening cap (19), the needle valve body (20), the nozzle lock nut (21) and the nozzle (22) are provided. The needle valve guide sleeve (15) and the needle valve (16) are matched with the needle valve body (20) as matching parts, and two sliding surfaces of the needle valve (16) can respectively axially slide in a middle hole of the needle valve body (20) and a middle hole of the needle valve guide sleeve (15); two ends of the needle valve reset spring (17) respectively press the needle valve guide sleeve (15) and the needle valve (16), so that the top end of the needle valve guide sleeve (15) is tightly pressed on the lower plane of the orifice plate (14), and the conical surface at the lower end of the needle valve (16) can abut against the conical surface of the middle hole of the needle valve body (20). The pressure regulating gasket (18) regulates pressing force; the bottom cylindrical surface of the needle valve body (20) is in interference fit with a counter bore of the nozzle (22) and is further fixed by a nozzle lock nut (21), and the nozzle (22) is provided with a spray hole for spraying fuel. The injector body cap (19) connects the nozzle member to the injector body (1) and presses the tip end face of the needle valve body (20) against the bottom end of the orifice plate (14).
In the structure, the circulating oil passage (101) and the oil inlet passage (102) are led into the middle hole of the needle valve body (20) through the oil injector body (1) and the metering orifice plate (14). The metering orifice plate (14), the needle valve guide sleeve (15) and the needle valve (16) surround to form a pressure control chamber (104) which is communicated with the outside through the oil inlet metering orifice (103) and the oil outlet metering orifice (105). The fuel oil return passage (106) is arranged on the fuel injector body (1) and is separated from the fuel outlet hole (105) by a steel ball (13). The mixed oil discharge channel (107) is communicated with a ring cavity enclosed by the ring groove in the middle of the guide sleeve (8) and the sealing ring (10). The cooling oil inlet channel (108) and the cooling oil return channel (109) are communicated with an oil cavity formed by the electromagnet (3), the guide sleeve (8) and the sealing ring (10) in a surrounding way and are communicated with each other through a slotted hole on the sleeve (7).
Referring to fig. 5 and 5a, the outer side of the middle part of the guide sleeve (8) is provided with a ring groove (110), and the middle part of the ring groove is provided with a transverse through hole which is directly communicated with a middle hole of the guide sleeve (8); sealing ring grooves are arranged on two sides of the ring groove. The diameter of the bottom end of the control valve core (9) is larger than that of the guide section, three ring grooves (111) are formed in the guide section, and the second ring groove is communicated with a transverse through hole in the middle of the guide sleeve (8). The control valve core (9), the guide sleeve (8) and the sealing ring (10) divide a central hole of the oil injector body (1) into three chambers.
As can be seen from the combination of FIG. 3 and FIG. 3a, the middle of the top end of the orifice plate (14) is provided with a sink groove. The ball valve seat guide sleeve (11) can be sleeved into a sink groove of the metering orifice plate (14); the upper half section of the central hole of the ball valve seat guide sleeve (11) is larger than the lower half section, the lower half section is in clearance fit with the ball valve seat (12), and the lower half section of the central hole of the guide sleeve (11) has certain guiding capacity for the axial movement of the ball valve seat (12); the top end is provided with a cross milling groove, and three milling grooves are uniformly distributed on the guide surface of the ball valve seat (12). And a cavity above the steel ball (13) is communicated with the fuel oil return passage (105) through milling grooves on the ball valve seat (12) and the ball valve seat guide sleeve (11).
Referring to fig. 8, the nozzle (22) used in this embodiment includes a nozzle body (222) and a plunger (221) engaged therewith; the nozzle body (222) and the needle valve body are arranged in an interference fit mode through a nozzle interference fit surface (223), and the ejector rod is rigidly connected to a needle valve head of the fuel injector applying the nozzle or integrally processed with the needle valve head. The length of the oil nozzle is larger than 19mm, and the nozzle body (222) and the ejector rod (221) are both arranged below the sealing seat surface of the needle valve matching part.
Two surfaces with smaller diameters in the middle of the nozzle body (222) are radially matched with the ejector rod (221) to form two close matching surfaces, namely a nozzle upper close-fitting surface (225) and a nozzle lower close-fitting surface (227). The clearance between the ejector rod (221) and the nozzle body (222) on the tight matching surface is small, so that the device has a guiding effect on the ejector rod and has better sealing capability. The tight-fitting surface (225) at the upper part of the nozzle and the tight-fitting surface (226) at the lower part of the nozzle divide an oil cavity between the nozzle body (222) and the ejector rod (221) into an upper nozzle cavity (224), a middle nozzle cavity (226) and a lower nozzle cavity (228), the ejector rod (221) is provided with a central longitudinal hole (2210) and a transverse hole (2211), and the upper nozzle cavity (224) is communicated with the lower nozzle cavity (228). The orifices (229) are all arranged in the nozzle chamber (226).
The working principle of the nozzle is as follows:
in the initial state, the conical surface on the needle valve and the seat surface on the needle valve body form a sealing effect, and high-pressure fuel to be injected is accumulated above the sealing seat surface.
In the injection state, the needle valve is lifted by mechanical force or hydraulic pressure provided by the control end of the oil injector, the sealing seat surface is opened, meanwhile, the needle valve drives the ejector rod (221), and the lower tight matching surface (227) between the nozzle body (222) and the ejector rod (221) is staggered, so that the nozzle lower cavity (228) is communicated with the nozzle middle cavity (226). At this time, the high-pressure fuel above the seal seat surface flows into the nozzle middle chamber (226) through the seal seat surface, the nozzle upper chamber (224), the transverse hole (2211), the longitudinal hole (2210) and the nozzle lower chamber (228), and is finally injected into the cylinder from the injection hole (229) arranged in the nozzle middle chamber (226) to participate in combustion.
In the spray stopping state, the control end of the fuel injector does not provide force, the needle valve falls under the action of spring force or other reset force and is pressed on the sealing seat surface again, and high-pressure fuel is sealed on the sealing seat surface. At the moment, the nozzle body (222) and the lower tight-fitting surface (227) of the ejector rod (221) are attached to each other again, so that the lower nozzle cavity (228) is disconnected from the middle nozzle cavity (226). The upper nozzle tight-fitting surface (225) and the lower nozzle tight-fitting surface (227) separate the upper nozzle cavity (224) and the lower nozzle cavity (228) from the middle nozzle cavity (226), respectively, and the rest of the oil located in the upper nozzle cavity (224) and the lower nozzle cavity (228) cannot flow to the spray hole (229), so that the oil spray stops. At the moment, waste gas after combustion in the cylinder can only contact with the nozzle middle cavity (226) through the spray hole (229) and cannot corrode the sealing seat surface of the needle valve coupling piece, and meanwhile, the nozzle is long, the needle valve coupling piece can be arranged in a cylinder cover which is far away from the cylinder and has a relatively good cooling condition, and damage of a high-temperature environment and poor-quality fuel to the sealing seat surface of the needle valve of the fuel injector can be effectively reduced. Because the diameter of the nozzle is smaller than that of the needle valve body, the required mounting hole can be properly reduced, the mounting space for the air inlet cylinder wall measurement is saved, and the allowance is provided for the arrangement of other equipment needing to be mounted on the air cylinder wall, such as an air valve and the like.
For the nozzle, the nozzle body is made of corrosion-resistant and heat-resistant material with small thermal expansion coefficient, so that the thermal deformation generated by heating the nozzle body can be reduced, the gap width between the nozzle body and the ejector rod is indirectly stable, and the stable operation is ensured.
The working principle of the electric control common rail type heavy oil injector with the structure is as follows:
when the electromagnet (3) is not electrified, heavy oil fuel oil flows into the middle hole of the needle valve body (20) through the oil inlet interface (24) and the oil inlet oil duct (103) and then flows into the pressure control chamber (104) through the oil inlet measuring hole (103), and at the moment, the control valve core (9) compresses the ball valve seat (12), so that the steel ball (13) is propped against the oil outlet measuring hole (105). The pressure of the fuel in the pressure control chamber (104) is equal to the pressure in the bore in the needle valve body (20). The two ends of the needle valve (16) are subjected to fuel pressure and spring force transmitted by a needle valve return spring (17), the resultant force direction of the needle valve (16) is downward, the seating state is maintained, and the conical surface at the lower end of the needle valve (16) can abut against the oil injection end of a needle valve body (20).
When the electromagnet (3) is electrified, electromagnetic force is generated, the armature (6) is under the action of attraction, and when the electromagnetic force is larger than the spring force of the control valve return spring (4), the control valve core (9) moves upwards along with the armature (6) to the position with the large diameter at the bottom end to be contacted with the bottom end of the guide sleeve (8) under the influence of the resultant force. The steel ball (13) is separated from the original position, the oil outlet hole (105) is opened at the moment, high-pressure oil in the pressure control chamber (104) flows upwards through the oil outlet hole (105), passes through three milling grooves uniformly distributed on the guide surface of the ball valve seat (12), an upper section opening of a middle hole of the ball valve seat guide sleeve (11) and a top end through groove, and finally flows out of the oil injector from the fuel oil return channel (106) and the oil return interface (28). At the moment, the hydraulic pressure in the pressure control chamber (104) is gradually reduced, the hydraulic pressure difference on two sides of the needle valve (16) is increased, the needle valve (16) moves upwards and opens the seal with the needle valve body (20), high-pressure fuel is sprayed out from the nozzle (22), and the fuel spraying process is started.
When the electromagnet (3) is powered off, the control valve return spring (4) enables the control valve core (9) to fall down again, the steel ball props against the oil outlet metering hole (105) again, and the oil inlet metering hole (103) replenishes oil to the pressure control chamber (104). The hydraulic pressure increases. The needle valve (16) moves downwards under the combined action of hydraulic pressure and a needle valve return spring (17), the conical surface of the lower end of the needle valve (16) props against the oil injection port of the needle valve body (20) again, and the oil injection process is finished.
The high-pressure oil part of the oil sprayer is communicated with a circulating oil duct (101) and a circulating oil interface (25) to provide an oil path for installing an external circulating oil valve. The circulating oil valve has the effects that when the oil sprayer works normally, the circulating oil valve is closed, and the normal work of the oil sprayer is not influenced; when the fuel oil system is ready to stop, the system uses certain low-pressure clean fuel oil to flow into the oil sprayer, at the moment, the circulating oil valve is opened due to low pressure, the fuel oil can flow in the oil sprayer at a certain speed to clean residual heavy oil, and the phenomenon that a fitting part is stuck and a pore is blocked after the residual heavy oil with a large amount of impurities is cooled is prevented.
The cooling oil inlet channel (108) and the cooling oil return channel (109) are communicated with an oil cavity formed by the electromagnet (3), the guide sleeve (8) and the sealing ring (10) and are communicated with each other through a slotted hole on the sleeve (7). The heat is taken away by the flowing forced cooling of the cooling oil, and the thermal damage of the electronic elements caused by high temperature caused by heavy oil is avoided.
The control valve core (9), the guide sleeve (8) and the sealing ring (10) divide a central hole of the oil injector body (1) into three chambers. The upper cooling oil cavity and the lower heavy oil return cavity are compressed and tightly sealed with the planes of all parts through a sealing ring (10) in the middle, and three annular grooves (111) are formed in the guide section of the control valve core (9) to strengthen dynamic sealing between the control valve core and the guide sleeve (8). In order to prevent the cooling oil circuit from being polluted due to slight leakage generated after long-term use, a second ring groove on the guide section of the control valve core (9) is communicated with a transverse through hole in the middle of the guide sleeve (8), heavy oil and cooling oil respectively leak into the second ring groove from the first ring groove and the third ring groove, pass through the middle ring groove (110) of the guide sleeve (8) and flow into a mixed oil discharge channel (107), and are finally led out from a mixed oil interface (29), so that the hydraulic pressure at the second ring groove of the guide section of the control valve core (9) is further reduced, the pressure of the cooling oil in the upper third ring groove and the lower mixed oil hydraulic pressure at the second ring groove form a downward pressure difference, and the heavy oil is prevented from upwards leaking due to extrusion of a guide surface. The cooling oil way is isolated from the fuel oil way by the modes of static sealing, dynamic sealing and drainage. The technical scheme can effectively avoid the pollution of heavy oil to cooling oil, and further avoid the corrosion to electromagnetic elements.
The electro-hydraulic control component adopts a ball valve as a control valve, and the ball valve has better self-alignment. Meanwhile, the guide sleeve has certain guiding capacity for axial movement of the ball valve seat, so that the steel ball (13) is prevented from laterally deviating due to inclination of the installation angle of the oil sprayer, and the working stability is further improved. Meanwhile, the ball valve seat guide sleeve and the ball valve seat can be directly taken down from the metering orifice plate as a single piece, and the matching grinding and damaged replacement can be conveniently carried out due to the requirement of adjusting the lift of the control valve of the oil injector.
Claims (8)
1. An electrically controlled common rail heavy oil injector comprising: the device comprises an oil injector body (1), an electro-hydraulic control component and a nozzle component; the method is characterized in that:
the middle of the top end of the oil sprayer body (1) is provided with an electronic interface (23), the top end is circumferentially provided with an oil inlet interface (24), a circulating oil interface (25), a cooling oil inlet interface (26), a cooling oil outlet interface (27), an oil return interface (28) and a mixed oil interface (29) which are respectively connected with a wire end of the electromagnet (3), an oil inlet oil duct (102), a circulating oil duct (101), a cooling oil inlet duct (108), a cooling oil return duct (109), a fuel oil return duct (106) and a mixed oil discharge duct (107);
the electro-hydraulic control component comprises an electromagnet (3), a control valve return spring (4), an armature (6), a sleeve (7), a guide sleeve (8), a control valve core (9), a ball valve seat guide sleeve (11), a ball valve seat (12), a steel ball (13) and a metering orifice plate (14); the metering orifice plate (14) is arranged between the oil injector body (1) and the nozzle component, and an oil inlet metering orifice (103) and an oil outlet metering orifice (105) are arranged in the metering orifice plate; the control valve core (9) is matched with the guide sleeve (8) as a matching part, and a middle hole of the guide sleeve (8) can guide the control valve core (9) to axially slide; the ball valve seat (12) is arranged in the ball valve seat guide sleeve (11); the electromagnet (3), the sleeve (7), the guide sleeve (8) and the ball valve seat guide sleeve (11) are sequentially assembled in a middle hole of the oil injector body (1) from top to bottom and are tightly pressed on the metering orifice plate (14) by the compression nut (2); the control valve core (9), the ball valve seat (12) and the steel ball (13) are sequentially contacted, and a control valve return spring (4) positioned in a middle hole of the electromagnet (3) is tightly pressed on a sealing conical surface of the metering orifice plate (14) to block the oil outlet metering orifice (105); the guide sleeve (8) is sealed by installing sealing rings (10) in two sealing ring grooves on the outer side;
a sink groove is formed in the middle of the top end of the metering orifice plate (14), and the ball valve seat guide sleeve (11) is sleeved in the sink groove; the upper half section of the central hole of the ball valve seat guide sleeve (11) is provided with an opening larger than the lower half section, the lower half section is in clearance fit with the ball valve seat (12), and the ball valve seat guide sleeve has certain guide capacity on the axial movement of the ball valve seat (12); the top end of the ball valve seat guide sleeve (11) is provided with a cross milling groove, three milling grooves are uniformly distributed on the guide surface of the ball valve seat (12), and a cavity above the steel ball (13) is communicated with the fuel oil return passage (106) through the milling grooves on the ball valve seat (12) and the ball valve seat guide sleeve (11);
the circulating oil duct (101) and the oil inlet duct (102) are communicated with the nozzle component through the oil injector body (1) and the metering orifice plate (14).
2. An electrically controlled common rail heavy oil injector as defined in claim 1, wherein: the nozzle component comprises a needle valve guide sleeve (15), a needle valve (16), a needle valve return spring (17), a pressure regulating gasket (18), a device body tightening cap (19), a needle valve body (20) and a nozzle (22); the needle valve guide sleeve (15) and the needle valve (16) are matched with the needle valve body (20) as matching parts, and the upper sliding surface and the lower sliding surface of the needle valve (16) can respectively axially slide in the middle hole of the needle valve body (20) and the middle hole of the needle valve guide sleeve (15); two ends of a needle valve reset spring (17) respectively press a needle valve guide sleeve (15) and a needle valve (16), so that the top end of the needle valve guide sleeve (15) is tightly pressed on the lower plane of the orifice plate (14), and the conical surface of the lower end of the needle valve (16) is propped against the conical surface of the middle hole of a needle valve body (20); the cylindrical surface at the bottom end of the needle valve body (20) is in interference fit with a counter bore of the nozzle (22), and the nozzle (22) is provided with a spray hole for spraying fuel oil; the injector body tightening cap (19) connects the nozzle component to the injector body (1) and causes the top end surface of the needle valve body (20) to be pressed on the bottom end of the orifice plate (14); and the circulating oil duct (101) and the oil inlet duct (102) are led into the middle hole of the needle valve body (20) through the oil injector body (1) and the metering orifice plate (14).
3. An electrically controlled common rail heavy oil injector as defined in claim 2, wherein: the nozzle (22) comprises a nozzle body (222) and a push rod (221) matched with the nozzle body; the nozzle body is arranged on the needle valve body in an interference manner, and the ejector rod is rigidly connected to the head of the needle valve or is processed into a whole with the head of the needle valve; an upper close matching surface and a lower close matching surface are arranged between the nozzle body and the ejector rod matched with the nozzle body, an oil cavity between the nozzle body and the ejector rod is divided into an upper nozzle cavity, a middle nozzle cavity and a lower nozzle cavity, the ejector rod is provided with a central longitudinal hole and a transverse hole, the upper nozzle cavity is communicated with the lower nozzle cavity, and a spray hole in the nozzle body is positioned in the width range of the middle nozzle cavity; when the oil sprayer is in a spraying state, the close matching surfaces of the nozzle body and the lower part of the ejector rod are staggered, so that the lower nozzle cavity is communicated with the middle nozzle cavity, and when the oil sprayer is in a spraying stopping state, the close matching surfaces of the nozzle body and the lower part of the ejector rod are mutually attached, so that the lower nozzle cavity is disconnected with the middle nozzle cavity.
4. An electrically controlled common rail heavy oil injector according to claim 2 or 3, characterized in that: the length of the nozzle is more than or equal to 19 mm.
5. An electrically controlled common rail heavy oil injector as defined in claim 3, wherein: the nozzle locking nut (21) is sleeved outside the part where the needle valve body is combined with the nozzle body, the upper end of the nozzle locking nut (21) is in threaded connection with the needle valve body, the needle valve body and the nozzle body are tightly sleeved by the inner wall of the tightening cap, and the taper angle and the thickness of the lower end of the tightening cap are designed to be matched with the taper angle of the installation seat surface required by the oil sprayer and the length of the nozzle extending into the cylinder.
6. An electrically controlled common rail heavy oil injector as defined in claim 1, 2 or 3, wherein: the metering orifice plate (14), the needle valve guide sleeve (15) and the needle valve (16) are surrounded to form a pressure control chamber (104) which is communicated with the outside through an oil inlet metering orifice (103) and an oil outlet metering orifice (105); the fuel oil return passage (106) is arranged on the oil injector body (1) and is separated from the oil outlet metering orifice (105) by a steel ball (13); the mixed oil discharge channel (107) is communicated with a ring cavity surrounded by a ring groove (110) on the outer side of the middle part of the guide sleeve (8) and the sealing ring (10); the cooling oil inlet channel (108) and the cooling oil return channel (109) are communicated with an oil cavity formed by the electromagnet (3), the guide sleeve (8) and the sealing ring (10) in a surrounding way and are communicated with each other through a slotted hole on the sleeve (7).
7. An electrically controlled common rail heavy oil injector as defined in claim 1, 2 or 3, wherein: an annular groove (110) is formed in the outer side of the middle of the guide sleeve (8), and a transverse through hole is formed in the middle of the annular groove and is directly communicated with a middle hole of the guide sleeve (8); sealing ring grooves are arranged on two sides of the ring groove; the diameter of the bottom end of the control valve core (9) is larger than that of the guide section, three ring grooves (111) are formed in the guide section, and the second ring groove is communicated with a transverse through hole in the middle of the guide sleeve (8); the control valve core (9), the guide sleeve (8) and the sealing ring (10) divide a central hole of the oil injector body (1) into three chambers.
8. An electrically controlled common rail heavy oil injector as defined in claim 1, 2 or 3, wherein: the armature iron (6) and the top end thread of the control valve core (9) are fixed by a nut (5).
Priority Applications (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910915177.7A CN110594061B (en) | 2019-09-26 | 2019-09-26 | Electric control common rail type heavy oil injector |
| FI20215086A FI130836B1 (en) | 2019-09-26 | 2020-04-23 | Electronically controlled common-rail heavy fuel injector |
| DE112020000639.5T DE112020000639T5 (en) | 2019-09-26 | 2020-04-23 | Electronically controlled heavy oil common rail injector |
| GB2018634.2A GB2596882B8 (en) | 2019-09-26 | 2020-04-23 | Electronic control common-rail-type heavy oil injector |
| PCT/CN2020/086383 WO2021057018A1 (en) | 2019-09-26 | 2020-04-23 | Electronic control common-rail-type heavy oil injector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910915177.7A CN110594061B (en) | 2019-09-26 | 2019-09-26 | Electric control common rail type heavy oil injector |
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| Publication Number | Publication Date |
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| CN110594061A CN110594061A (en) | 2019-12-20 |
| CN110594061B true CN110594061B (en) | 2021-02-26 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201910915177.7A Active CN110594061B (en) | 2019-09-26 | 2019-09-26 | Electric control common rail type heavy oil injector |
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| Country | Link |
|---|---|
| CN (1) | CN110594061B (en) |
| DE (1) | DE112020000639T5 (en) |
| FI (1) | FI130836B1 (en) |
| GB (1) | GB2596882B8 (en) |
| WO (1) | WO2021057018A1 (en) |
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| CN110594061B (en) * | 2019-09-26 | 2021-02-26 | 重庆红江机械有限责任公司 | Electric control common rail type heavy oil injector |
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| CN104314725B (en) * | 2014-09-25 | 2019-05-31 | 辽阳钜锋汽车零部件有限公司 | Mesopore pressure accumulation without static leakage fuel injector |
| CN106050498B (en) * | 2016-05-27 | 2018-07-24 | 中国第一汽车股份有限公司无锡油泵油嘴研究所 | A kind of solenoid valve sunk type fuel injector |
| CN106351775B (en) * | 2016-11-24 | 2019-11-12 | 北油电控燃油喷射系统(天津)有限公司 | A kind of control chamber middle high-pressure electric control fuel injector |
| CN106609719B (en) * | 2016-12-31 | 2022-05-10 | 南岳电控（衡阳）工业技术股份有限公司 | Oil sprayer for high-pressure common rail fuel injection system |
| CN109488501B (en) * | 2018-12-27 | 2024-03-08 | 重庆红江机械有限责任公司 | Servo oil driven common rail oil sprayer for heavy oil |
| CN109404189B (en) * | 2018-12-29 | 2024-02-13 | 重庆红江机械有限责任公司 | Heavy oil electric control fuel injector for low-speed diesel engine |
| CN109707546A (en) * | 2018-12-29 | 2019-05-03 | 重庆红江机械有限责任公司 | A kind of oil control valve out of electric-controlled fuel injector |
| CN110594061B (en) * | 2019-09-26 | 2021-02-26 | 重庆红江机械有限责任公司 | Electric control common rail type heavy oil injector |
-
2019
- 2019-09-26 CN CN201910915177.7A patent/CN110594061B/en active Active
-
2020
- 2020-04-23 DE DE112020000639.5T patent/DE112020000639T5/en active Pending
- 2020-04-23 GB GB2018634.2A patent/GB2596882B8/en active Active
- 2020-04-23 FI FI20215086A patent/FI130836B1/en active
- 2020-04-23 WO PCT/CN2020/086383 patent/WO2021057018A1/en active Application Filing
Also Published As
| Publication number | Publication date |
|---|---|
| GB2596882A (en) | 2022-01-12 |
| GB202018634D0 (en) | 2021-01-13 |
| FI20215086A1 (en) | 2021-03-27 |
| WO2021057018A1 (en) | 2021-04-01 |
| GB2596882B8 (en) | 2023-07-12 |
| CN110594061A (en) | 2019-12-20 |
| GB2596882B (en) | 2023-06-07 |
| DE112020000639T5 (en) | 2021-10-21 |
| FI130836B1 (en) | 2024-04-16 |
| GB2596882A8 (en) | 2023-07-12 |
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