WO2022205862A1 - Injecteur tourbillonnaire à basse pression hydraulique - Google Patents

Injecteur tourbillonnaire à basse pression hydraulique Download PDF

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Publication number
WO2022205862A1
WO2022205862A1 PCT/CN2021/125971 CN2021125971W WO2022205862A1 WO 2022205862 A1 WO2022205862 A1 WO 2022205862A1 CN 2021125971 W CN2021125971 W CN 2021125971W WO 2022205862 A1 WO2022205862 A1 WO 2022205862A1
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WIPO (PCT)
Prior art keywords
swirl
hole
plate
flow
low
Prior art date
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PCT/CN2021/125971
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English (en)
Chinese (zh)
Inventor
欧阳玲湘
李成校
邓飞
伍新义
龙美彪
Original Assignee
南岳电控衡阳工业技术股份有限公司
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Application filed by 南岳电控衡阳工业技术股份有限公司 filed Critical 南岳电控衡阳工业技术股份有限公司
Priority to DE212021000544.6U priority Critical patent/DE212021000544U1/de
Publication of WO2022205862A1 publication Critical patent/WO2022205862A1/fr

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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
    • F02M51/0625—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures
    • F02M51/0664—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures having a cylindrically or partly cylindrically shaped armature, e.g. entering the winding; having a plate-shaped or undulated armature entering the winding
    • F02M51/0671—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures having a cylindrically or partly cylindrically shaped armature, e.g. entering the winding; having a plate-shaped or undulated armature entering the winding the armature having an elongated valve body attached thereto
    • F02M51/0682—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures having a cylindrically or partly cylindrically shaped armature, e.g. entering the winding; having a plate-shaped or undulated armature entering the winding the armature having an elongated valve body attached thereto the body being hollow and its interior communicating with the fuel flow
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/02—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
    • F01N3/021—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters
    • F01N3/023—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters using means for regenerating the filters, e.g. by burning trapped particles
    • F01N3/025—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters using means for regenerating the filters, e.g. by burning trapped particles using fuel burner or by adding fuel to exhaust
    • F01N3/0253—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters using means for regenerating the filters, e.g. by burning trapped particles using fuel burner or by adding fuel to exhaust adding fuel to exhaust gases
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
    • F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
    • F01N3/24—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by constructional aspects of converting apparatus
    • F01N3/36—Arrangements for supply of additional fuel
    • 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
    • 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
    • F02M61/162—Means to impart a whirling motion to fuel upstream or near discharging orifices
    • 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
    • F02M61/1853—Orifice plates
    • 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
    • F02M61/188—Spherical or partly spherical shaped valve member ends
    • 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
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2610/00—Adding substances to exhaust gases
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2610/00—Adding substances to exhaust gases
    • F01N2610/14—Arrangements for the supply of substances, e.g. conduits
    • F01N2610/1453—Sprayers or atomisers; Arrangement thereof in the exhaust apparatus
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/12—Improving ICE efficiencies

Definitions

  • the invention relates to the technical field of automobile parts manufacturing, in particular to a low hydraulic swirl injector.
  • injectors with low hydraulic pressure from 3bar to 10bar are more and more widely used.
  • the injector Under the control of electronic control unit, the injector atomizes a certain amount of fuel and sprays it into the intake port or exhaust pipe and mixes it with air.
  • injectors can be divided into gasoline injectors, methanol injectors, urea injectors and so on.
  • the purpose of the present invention is to solve the technical problems existing in the existing products, and to provide a kind of liquid that can be swirled out of the nozzle hole, can improve the particle size of the atomized particles, improve the flow consistency, has a simple and reasonable structure, and is convenient to manufacture and assemble. Low hydraulic swirl injector structure with low production cost.
  • a low hydraulic swirl injector includes an electromagnet part, an oil inlet joint, an iron core spring assembly and an injection valve assembly sequentially installed in the electromagnet part from top to bottom, the iron core spring assembly includes an iron core and an installation The spring in the iron core, the electromagnet component drives the iron core to move, the injection valve assembly includes a nozzle body and a valve stem, steel ball, valve seat, The swirl plate and the nozzle plate; the spring acts on the valve stem; it is characterized in that, the valve seat inner cone hole, the flow hole and the counterbore that communicate with each other are arranged in sequence from top to bottom in the valve seat; The swirl plate is installed in the countersunk hole of the valve seat, and the upper surface of the swirl plate is closely attached to the top surface of the counterbore; The shunting countersunk holes through which the flow holes pass are distributed with a plurality of shunting grooves whose inner ends pass through the shunting counterbore; the outer circle of the swirl plate is provided with a flat square corresponding to the outer
  • a flow passage; a swirl counterbore is arranged on the lower surface of the swirl plate, and a number of swirl grooves are distributed with the inner end passing through the swirl counterbore, and the outer end of each swirl groove passes through the corresponding fluid
  • the overflow channel is communicated with the outer end of the corresponding distribution groove;
  • the nozzle plate is closely attached to the lower surface of the swirl plate, and a spray hole is formed on the nozzle plate which is passed through with the swirl counterbore, with
  • the steel ball is in sealing contact and separation with the inner cone surface in the inner cone hole of the valve seat in the valve seat, so as to close and open the flow hole in the valve seat;
  • the fuel coming from the orifice passes through the shunting counterbore and the swirl slot, and enters the swirl slot through the fluid flow channel.
  • the fuel After the fuel passes through the swirl slot, it produces a violent impact and forms turbulent flow and converges to the swirl hole.
  • the atomized particles are sprayed from the nozzle holes of the nozzle plate, so that the particle size of the atomized particles will be significantly improved.
  • the diameter of the flow distribution counterbore is larger than the diameter of the flow hole in the valve seat.
  • the number of the distribution grooves is 3 to 6, which extend radially on the upper surface of the swirl plate, and are uniformly distributed on the upper surface of the swirl plate at the same time. .
  • each of the flat squares is evenly distributed along the circumferential direction of the swirl plate.
  • each of the swirling grooves is uniformly distributed on the lower surface of the swirling plate.
  • each swirl groove is tangent to the swirl hole.
  • each of the distribution grooves and each of the swirling grooves are rectangular grooves.
  • the sum of the flow area of each distribution groove of the swirl plate is not less than the sum of the flow area of each of the swirl grooves.
  • the sum of the flow-through areas of the distribution grooves of the swirl plate is more than 1.2 times the sum of the orifice areas of the orifice plate.
  • the steel ball is placed in the steel ball receiving hole of the valve seat, and 3 to 5 flat squares are symmetrically arranged along the center of the steel ball, so that the steel ball is aligned with the steel ball.
  • a fluid flow gap is formed between the hole walls of the bearing hole for the fluid to pass through.
  • the low hydraulic cyclone ejector of the present invention has the advantages of being able to improve the particle size of the atomized particles, improve the flow consistency, simple and reasonable structure, convenient manufacture and assembly, and low production cost.
  • FIG. 1 is a schematic general view of the structure of the injector according to the present invention.
  • FIG. 2 is a schematic structural diagram of the valve seat of the present invention.
  • FIG. 3 is a schematic structural diagram of the upper surface of the swirl plate of the present invention.
  • FIG. 4 is a schematic structural diagram of the lower surface of the swirl plate of the present invention.
  • Figure 5 is a schematic diagram of the structure of the nozzle plate of the present invention
  • valve stem of the present invention is a schematic cross-sectional view of the valve stem of the present invention.
  • FIG. 7 is a schematic sectional view of the iron core of the present invention.
  • the low hydraulic swirl injector shown in the figures mainly includes an electromagnet component 13, an oil inlet joint, an iron core spring assembly and an injection valve assembly.
  • the oil inlet joint includes a filter screen support 10 , a filter screen 11 and an O-ring seal 12 .
  • a middle hole 103 is provided in the filter screen holder 10 , and the filter screen 11 is placed in the middle hole 103 .
  • the iron core spring assembly includes an iron core 8 , a spring upper seat 9 and a spring 7 .
  • the injection valve assembly includes a nozzle body 6 , a valve stem 5 , a steel ball 4 , a valve seat 3 , a swirl plate 2 and a nozzle plate 1 .
  • the valve seat 3 is fixed at the lower end of the inner hole 603 of the nozzle body 6 by laser welding.
  • the valve seat 3 is provided with a steel ball bearing hole 304 , an inner cone hole 303 , a flow hole 302 and a counterbore 301 which communicate with each other in sequence from top to bottom.
  • the swirl plate 2 is installed in the counterbore 301 of the valve seat 3 , and the upper surface 201 of the swirl plate 2 is in close contact with the upper surface of the counterbore 301 . 3 and 4 , the upper surface 201 of the swirl plate 2 is provided with a distribution counterbore 203 and 3 to 6 distribution grooves 202 , and the inner end of each distribution groove 202 communicates with the distribution groove 202 .
  • the diameter of the flow distribution counterbore 203 should be larger than the diameter of the flow hole 302 of the valve seat 3 .
  • the 3-6 distribution grooves 202 are used to distribute the fluid passing through the distribution counterbore 203 , and the 3-6 distribution grooves 202 are evenly distributed on the upper surface 201 of the swirl plate 2 in the circumferential direction.
  • Each distribution slot 202 of the swirl plate 2 is a rectangular slot, and its length direction all intersects with the distribution counterbore 203 .
  • each distribution slot 202 communicates with the corresponding fluid flow passage.
  • a swirl hole 207 and a swirl slot 206 are provided on the lower surface 205 of the swirl plate 2.
  • the inner end of each swirl slot 206 communicates with the swirl hole 207, and the outer end communicates with the corresponding fluid flow passage. , which is used to create a swirl flow when the fluid passes through.
  • the swirl grooves 206 are evenly distributed in the circumferential direction on the lower surface 205 of the swirl plate 2 .
  • Each swirl slot 206 of the swirl plate 2 is a rectangular slot, and its length direction is tangent to the swirl hole 207 .
  • the sum of the flow-through areas of the distribution grooves 202 of the swirl plate 2 is not less than the sum of the flow-through areas of the swirl grooves 206 .
  • the lower surface 205 of the swirl plate 2 is in close contact with the nozzle plate 1 .
  • the nozzle plate 1 is provided with spray holes 101 for precise control of the spray flow.
  • the sum of the flow areas of the swirl grooves 206 is more than 1.2 times the area of the nozzle holes 101 of the nozzle plate.
  • the fuel oil coming from the flow hole 302 of the valve seat 3 passes through the branch flow between the flow distribution counterbore 203 and the flow distribution groove 202 , and enters the swirl groove 206 through the fluid flow passage.
  • the fuel passes through the swirl groove 206 produces a violent impact and forms turbulent flow and converges in the swirl hole 207, and then is ejected from the nozzle hole 101 of the nozzle plate 1, so that the particle size of the atomized particles will be significantly improved.
  • the steel ball 4 is placed in the steel ball bearing hole 304 of the valve seat 3.
  • the steel ball 4 is symmetrically arranged with 3 to 5 flat squares 401 along the center, so that a fluid flow gap is formed between it and the hole wall of the steel ball bearing hole 304. , for the passage of fluids.
  • the steel ball 4 is in sealing contact and separation with the inner conical surface in the inner conical hole 303 of the valve seat in the valve seat 3 to close and open the flow hole 302 in the valve seat 3 .
  • the steel ball 4 is fixedly connected with the lower end of the valve stem 5 by welding, and the upper end of the nozzle body 6 is fixedly connected with the lower end of the iron core 8 .
  • an axial inner hole that also serves as an oil passage is provided in the iron core 8 , and the axial inner hole is divided into three sections, from top to bottom, they are the first hole section 806 , the second hole section 801 , the first hole section 801 , and the third section.
  • the upper spring seat 9 is fitted in the first hole section 806, and an oil through hole (not shown in the figure) is provided in the upper spring seat 9.
  • the spring 7 is arranged in the second hole section 801 and the third hole section 802 , the upper end of the spring 7 is pressed against the spring upper seat 9 , and the lower end of the spring 7 is pressed against the valve stem 5 .
  • the inner diameter of the third hole section 802 is larger than the inner diameter of the second hole section 801 and the outer diameter of the spring 7 , so as to play a vacant role and avoid contact with the outer circle of the spring 7 .
  • the outer circle of the iron core 8 is composed of three-stage rod segments. From top to bottom, there are the first rod segment 803, the second rod segment 804 and the third rod segment 805, the first rod segment 803 and the oil filter screen bracket, which are coaxially arranged.
  • the inner hole 102 of 10 is guided and connected, the second rod section 804 is matched with the second hole section 132 of the electromagnet component 13 , and the third rod section 805 is guided and connected with the nozzle body cavity 602 of the nozzle body 6 .
  • the iron core 8 is provided with two limiting step surfaces. From top to bottom, there are a first limiting step surface 807 and a second limiting step surface 808.
  • the first limiting step surface 807 is laser welded to the bottom of the oil filter bracket 10.
  • the second step surface 808 is connected to the upper end surface of the nozzle body 6 by laser welding.
  • the outer circle of the valve stem 5 is mainly composed of two-stage rod segments. From top to bottom, there are a first rod segment 506 and a second rod segment 502 respectively.
  • the first rod segment is designed with an annular protrusion 507 and two
  • the ring groove 505 is provided with a counterbore 509 in the middle
  • a groove 508 is designed on the bottom surface of the counterbore 509
  • two transverse holes 503 are provided on the second rod section 502 .
  • the valve stem 5 is a hollow structure with a middle hole 504 , the top of the middle hole 504 communicates with the counterbore 509 , and the bottom surface of the middle hole 504 is provided with a tapered surface 501 .
  • the axes of the two horizontal holes 503 are crossed on the projection plane and both pass through the middle hole 504 .
  • the valve stem 5 is installed in the nozzle body cavity 602 and the inner hole 603 of the nozzle body 6, wherein the first hole section 502 of the valve stem 5 is matched with the nozzle body cavity 602 of the nozzle body 6, and the second hole section 502 of the valve stem 5 is matched with the nozzle body cavity 602 of the nozzle body 6.
  • An oil storage chamber 601 is formed between the inner holes 603 of the nozzle body 6 .
  • the electromagnet component 13 is provided with two sections of middle holes, from top to bottom are the first hole section 131 and the second hole section 132 respectively.
  • the first hole section 134 cooperates with the outer circle 104 of the oil filter screen bracket 10, and at the same time when the oil is filtered
  • An O-ring seal 12 is arranged at the mating part of the mesh support 10 to prevent external water from entering and corroding.
  • the second hole segment 132 is matched with the second rod segment 804 of the iron core 8 and the outer circle 604 of the nozzle body 6 , and an O-ring 14 is provided at the place where the second hole segment 132 and the outer circle 604 of the nozzle body 6 cooperate to prevent External water enters corrosion.
  • the electromagnet part 13 By providing the electromagnet part 13 on the outer circle 604 of the nozzle body 6 and/or the outer wall of the second rod section 804 of the iron core 8 , the electromagnet part 13 drives the valve stem 5 , in the nozzle body cavity 602 and the inner hole of the nozzle body 6 . 603 Repeated movement up and down.
  • the liquid is filtered by the filter screen 11 , and then passes through the middle hole 103 of the filter screen support 10 , the oil passage hole of the spring seat 9 , the axial inner hole of the iron core 8 , and the middle hole of the valve stem 5 .
  • the hole 504 and the two horizontal holes 503 enter the oil storage chamber 601 between the second hole section 502 of the valve stem 5 and the inner hole 603 of the nozzle body 6, and then flow into the hole of the steel ball bearing hole 304 of the valve seat 3
  • the fluid flow gap between the wall and the flat steel bulb 401 is shown in FIGS. 1 to 7 .
  • valve seat 3 When the power is off, the force of the spring 7 on the valve stem 5 and the steel ball 4 is vertically downward, and the force of the hydraulic pressure on the valve stem 5 and the steel ball 4 is also vertically downward. Under the action of the force, the valve seat 3 is in close contact with the inner conical surface of the inner conical hole 303 of the valve seat and is in sealing contact. At this time, the flow hole 302 in the valve seat 3 is in a closed state.
  • the iron core 8 quickly generates a sufficient electromagnetic suction force, attracts the valve stem 3 and drives the steel ball 4 to move up quickly against the spring force and hydraulic pressure of the spring 7 .
  • the steel ball 4 is out of contact with the inner conical surface in the inner conical hole 303 of the valve seat 3 , the overflow hole 302 in the valve seat 3 is opened.
  • the liquid passes through the fluid flow gap between the hole wall of the steel ball bearing hole 304 of the valve seat 3 and the steel ball flat square 401 and passes through the flow hole in the valve seat 3 302 enters the distribution counterbore 203 of the swirl plate 2, and then passes through each distribution slot 202 of the swirl plate 2, the flat square 204 of the outer circle of the swirl plate 2, and each swirl slot 206, resulting in severe impact and turbulent flow. Converged into the swirl hole 207, and finally ejected through the nozzle hole 101 on the nozzle plate 1.
  • the electromagnet component 13 When the fuel injection pulse width meets the requirements, the electromagnet component 13 is powered off under the instruction of the electronic control unit, and the electromagnetic force subsides. At this time, the valve stem 5 is also under the combined action of the upward hydraulic pressure and the downward spring force.
  • the hydraulic pressure is less than the spring force, the valve stem 3 and the steel ball 4 start to move downward, and the spring force of the spring 7 is at the valve stem 3.
  • the hydraulic pressures balance each other, and the resultant force at this time is only the downward spring force.
  • the spring force of the spring 7 makes the valve stem 3 and the steel ball 4 quickly fall back to the inner conical surface in the inner conical hole 303 of the valve seat 3, at this time the flow hole 302 in the valve seat 3 is in a closed state again, Spray ends.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Fuel-Injection Apparatus (AREA)
  • Magnetically Actuated Valves (AREA)

Abstract

Injecteur tourbillonnaire à basse pression hydraulique, comprenant une partie d'électroaimant (13), et un raccordement d'entrée d'huile, un ensemble ressort à noyau de fer et un ensemble soupape d'injection installés de manière séquentielle dans la partie d'électroaimant (13) de haut en bas. Un contre-alésage de déviation (203) et une pluralité de canaux de déviation (202) sont formés sur la surface supérieure (201) d'une plaque de tourbillonnement (2) ; des carrés plats (204) correspondant aux canaux de déviation (202) sont disposés sur le cercle externe de la plaque de tourbillonnement (2) ; des trous de tourbillonnement (207) et une pluralité de canaux de tourbillonnement (206) sont formés sur la surface inférieure (205) de la plaque de tourbillonnement (2) ; après le passage de fluide dévié à travers les canaux de tourbillonnement (206), un choc violent est produit et des écoulements turbulents sont formés et convergent dans les trous de tourbillonnement (207), de sorte que la taille de particule des particules atomisées est considérablement améliorée ; et un trou de pulvérisation (101) est formé sur une plaque de buses (1) permettant de commander avec précision un débit d'injection. L'injecteur tourbillonnaire à basse pression hydraulique peut améliorer la taille de particule des particules atomisées, renforcer l'uniformité d'écoulement, et est simple et raisonnable en termes de structure, pratique à fabriquer et à assembler, a un faible en coût de production, etc.
PCT/CN2021/125971 2021-03-28 2021-10-25 Injecteur tourbillonnaire à basse pression hydraulique WO2022205862A1 (fr)

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