WO2022205862A1 - Low-hydraulic-pressure swirl injector - Google Patents

Low-hydraulic-pressure swirl injector 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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WO
WIPO (PCT)
Prior art keywords
swirl
hole
plate
flow
low
Prior art date
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PCT/CN2021/125971
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French (fr)
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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Priority to DE212021000544.6U priority Critical patent/DE212021000544U1/en
Publication of WO2022205862A1 publication Critical patent/WO2022205862A1/en

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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)
  • Chemical Kinetics & Catalysis (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Fuel-Injection Apparatus (AREA)
  • Magnetically Actuated Valves (AREA)

Abstract

A low-hydraulic-pressure swirl injector, comprising an electromagnet part (13), and an oil inlet connector, an iron core spring assembly and an injection valve assembly sequentially installed in the electromagnet part (13) from top to bottom. A diversion counterbore (203) and a plurality of diversion channels (202) are formed on the upper surface (201) of a swirl plate (2); flat squares (204) corresponding to the diversion channels (202) are provided on the outer circle of the swirl plate (2); swirl holes (207) and a plurality of swirl channels (206) are formed on the lower surface (205) of the swirl plate (2); after diverted fluid passes through the swirl channels (206), violent impact is generated and turbulent flows are formed and converged in the swirl holes (207), so that the particle size of atomized particles is significantly improved; and a spray hole (101) is formed on a nozzle plate (1) for accurately controlling an injection flow rate. The low-hydraulic-pressure swirl injector can improve the particle size of the atomized particles, enhance the flow consistency, and is simple and reasonable in structure, convenient to manufacture and assemble, low in production cost. etc.

Description

低液压旋流喷射器Low Hydraulic Swirl Ejector 技术领域technical field
本发明涉及汽车零部件制造技术领域，特别是涉及一种低液压旋流喷射器。The invention relates to the technical field of automobile parts manufacturing, in particular to a low hydraulic swirl injector.
背景技术Background technique
目前，3bar～10bar低液压的喷射器应用越来越广泛，喷射器在电子控制单元的控制下，将一定量的燃料雾化后喷进气道或排气管内与空气混合。根据喷射燃料种类的不同,喷射器可以分为汽油喷射器、甲醇喷射器、尿素喷射器等。At present, injectors with low hydraulic pressure from 3bar to 10bar are more and more widely used. 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. According to the different types of injected fuel, injectors can be divided into gasoline injectors, methanol injectors, urea injectors and so on.
随着排放要求的逐渐提升，对喷射器雾化颗粒粒径的要求越来越高。现有的一般喷射器，在3bar～10Bar低液压下，喷射器的雾化粒径不理想，流量一致性较差，不能与空气充分接触并混合，从而影响汽车的排放性能。而且结构复杂，装配工艺性差，成本较高。With the gradual increase in emission requirements, the requirements for the particle size of the atomized particles in the injector are getting higher and higher. Existing general injector, under the low hydraulic pressure of 3bar to 10Bar, the atomization particle size of the injector is not ideal, the flow consistency is poor, and the air cannot be fully contacted and mixed, thus affecting the emission performance of the vehicle. Moreover, the structure is complex, the assembly process is poor, and the cost is high.
发明内容SUMMARY OF THE INVENTION
本发明的目的是针对现有产品存在的技术问题，提供一种可使液体从喷孔旋流喷出，能够改善雾化颗粒粒径，提高流量一致性，结构简单合理，制造和装配方便，生产成本低的低液压旋流喷射器结构。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.
本发明提供的具体技术方案如下：The specific technical scheme provided by the present invention is as follows:
低液压旋流喷射器，包括电磁铁部件和由上而下依次安装在所述电磁铁部件中的进油接头、铁芯弹簧组件和喷射阀组件，所述铁芯弹簧组件包括铁芯和安装在所述铁芯内的弹簧，所述电磁铁部件驱动所述铁芯运动，所述喷射阀组件包括喷嘴体和由上之下安装在所述喷嘴体内的阀杆、钢球、阀座、旋流板和喷嘴板；所述弹簧作用在所述阀杆上；其特征在于，所述阀座内由上而下依次设置相互贯通的阀座内锥面孔、过流孔和沉孔；所述旋流板安装在所述阀座的沉孔内且所述旋流板的上表面紧贴在所述沉孔的顶面上；在所述旋流板的上表面设置有与所述过流孔贯通的分流沉孔并分布有若干内端与所述分流沉孔贯通的分流槽；所述旋流板的外圆设置有与每一分流槽外端相对应的扁方，用于流 体过流通道；在所述旋流板的下表面设置有旋流沉孔并分布有若干内端与所述旋流沉孔贯通的旋流槽，每一旋流槽的外端通过对应的流体过流通道与对应的分流槽外端连通；所述喷嘴板紧贴在所述旋流板的下表面上并在所述喷嘴板上开设有一与所述旋流沉孔贯通的喷孔，用于精确控制喷射流量；所述钢球与所述阀座中的阀座内锥面孔中的内锥面密封接触与分离，以关闭和打开所述阀座内的过流孔；由所述过流孔过来的燃油通过分流沉孔和分流槽的分流，通过流体过流通道进入旋流槽内，燃油通过所述旋流槽后,产生剧烈冲击并形成紊流并汇聚到所述旋流孔中，再由喷嘴板的喷孔喷出，使得雾化颗粒粒径将得到明显提升。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 end of each shunting groove, which is used for fluid flow. 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 In order to accurately control the injection flow; 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. 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.
在本发明的一个优选实施例中，所述分流沉孔直径大于所述阀座中的过流孔直径。In a preferred embodiment of the present invention, the diameter of the flow distribution counterbore is larger than the diameter of the flow hole in the valve seat.
在本发明的一个优选实施例中，所述分流槽的数量为3～6个并且在所述旋流板的上表面上呈径向延伸，同时在所述旋流板的上表面上周向均布。In a preferred embodiment of the present invention, 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. .
在本发明的一个优选实施例中，各所述扁方沿所述旋流板的周向均匀分布。In a preferred embodiment of the present invention, each of the flat squares is evenly distributed along the circumferential direction of the swirl plate.
在本发明的一个优选实施例中，各所述旋流槽在所述旋流板的下表面上周向均匀分布。In a preferred embodiment of the present invention, each of the swirling grooves is uniformly distributed on the lower surface of the swirling plate.
在本发明的一个优选实施例中，各所述旋流槽的长度方向均与所述旋流孔相切。In a preferred embodiment of the present invention, the length direction of each swirl groove is tangent to the swirl hole.
在本发明的一个优选实施例中，各所述分流槽和各所述旋流槽均为矩形槽。In a preferred embodiment of the present invention, each of the distribution grooves and each of the swirling grooves are rectangular grooves.
在本发明的一个优选实施例中，所述旋流板的各分流槽的通流面积之和不小于所述各旋流槽的通流面积之和。In a preferred embodiment of the present invention, 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.
在本发明的一个优选实施例中，所述旋流板的各分流槽的通流面积之和为所述喷孔板的喷孔面积之和的1.2倍以上。In a preferred embodiment of the present invention, 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.
在本发明的一个优选实施例中，所述钢球放置在所述阀座的钢球承装孔内，所述钢球沿中心对称设置3～5个扁方，使之与所述钢球承装孔的孔壁之间形成流体过流间隙，用于流体通过。In a preferred embodiment of the present invention, 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.
通过采用上述技术方案，本发明的低液压旋流喷射器具有能够改善雾化颗粒粒径，提高流量一致性，结构简单合理，制造和装配方便，生产成本低等优点By adopting the above technical scheme, 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.
附图说明Description of drawings
图1为本发明结构喷射器结构示意总图。FIG. 1 is a schematic general view of the structure of the injector according to the present invention.
图2为本发明阀座的结构示意图。FIG. 2 is a schematic structural diagram of the valve seat of the present invention.
图3为本发明旋流板的上表面的结构示意图。FIG. 3 is a schematic structural diagram of the upper surface of the swirl plate of the present invention.
图4为本发明旋流板下表面的结构示意图。FIG. 4 is a schematic structural diagram of the lower surface of the swirl plate of the present invention.
图5为本发明喷嘴板结构示意图Figure 5 is a schematic diagram of the structure of the nozzle plate of the present invention
图6为本发明阀杆的剖面示意图。6 is a schematic cross-sectional view of the valve stem of the present invention.
图7为本发明铁芯的剖面示意图FIG. 7 is a schematic sectional view of the iron core of the present invention
具体实施方式Detailed ways
本发明的结构，结合附图进一步具体描述如下：The structure of the present invention is further specifically described as follows in conjunction with the accompanying drawings:
参见图1至图7，图中给出的低液压旋流喷射器主要包括电磁铁部件13、进油接头、铁芯弹簧组件和喷射阀组件。进油接头包括滤网支架10、滤网11和O型密封圈密封12。滤网支架10内设置有中孔103，滤网11放置在中孔103内。Referring to Figures 1 to 7, 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 .
铁芯弹簧组件包括铁芯8、弹簧上座9和弹簧7。The iron core spring assembly includes an iron core 8 , a spring upper seat 9 and a spring 7 .
喷射阀组件包括喷嘴体6、阀杆5、钢球4、阀座3、旋流板2和喷嘴板1。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 .
阀座3通过激光焊接固定在喷嘴体6的内孔603下端处。特别参见图2，阀座3内由上而下依次设置有相互贯通的钢球承装孔304、阀座内锥面孔303、过流孔302和沉孔301。The valve seat 3 is fixed at the lower end of the inner hole 603 of the nozzle body 6 by laser welding. Referring to FIG. 2 in particular, 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.
旋流板2安装在阀座3的沉孔301，旋流板2上表面201紧贴在沉孔301上表面上。特别参见图3和图4，在旋流板2的上表面201设有分流沉孔203和3～6个分流槽202，每个分流槽202的内端与分流槽202连通。分流沉孔203直径应大于阀座3的过流孔302直径。3～6个分流槽202用于将通过分流沉孔203的流体分流，且3～6个分流槽202在旋流板2的上表面201上周向均匀分布。旋流板2各个分流槽202均为矩形槽,且其长度方向均与所述分流沉孔203相交。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 .
在旋流板2的外圆设有和分流槽202外端相对应的扁方204，用于流体过流 通道，且各扁方204沿旋流板2的周向均匀分布。On the outer circumference of the swirl plate 2, there are flat squares 204 corresponding to the outer ends of the distribution grooves 202, which are used for fluid flow channels, and the flat squares 204 are evenly distributed along the circumferential direction of the swirl plate 2.
每个分流槽202的外端与相对应的流体过流通道连通。在旋流板2的下表面205上设有旋流孔207和个旋流槽206，每个旋流槽206的内端与旋流孔207连通，外端与相对应的流体过流通道连通，用于使流体通过时产生旋流。各旋流槽206在旋流板2的下表面205上周向均匀分布。旋流板2各个旋流槽206均为矩形槽,且其长度方向均与所述旋流孔207相切。旋流板2的各分流槽202通流面积之和不小于各旋流槽206通流面积之和。The outer end of 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 .
旋流板2的下表面面205和喷嘴板1紧贴。结合参见图5，喷嘴板1上设有喷孔101，用于精确控制喷射流量。各旋流槽206通流面积之和是喷嘴板的喷孔101面积的1.2倍以上。The lower surface 205 of the swirl plate 2 is in close contact with the nozzle plate 1 . Referring to FIG. 5 , 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.
通过采用上述技术方案后，由阀座3的过流孔302过来的燃油通过分流沉孔203和分流槽202的分流，通过流体过流通道进入旋流槽206内，燃油通过旋流槽206后,产生剧烈冲击并形成紊流并汇聚到旋流孔207中，再由喷嘴板1的喷孔101喷出，使得雾化颗粒粒径将得到明显提升。After adopting the above technical solution, 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. After 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.
钢球4放置在阀座3的钢球承装孔304，钢球4沿中心对称设置3～5个扁方401，使之与钢球承装孔304的孔壁之间形成流体过流间隙，用于流体通过。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.
钢球4与阀座3中的阀座内锥面孔303中的内锥面密封接触与分离，以关闭和打开阀座3内的过流孔302。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 .
钢球4与阀杆5的下端采用焊接方式固定连接，喷嘴体6的上端与铁芯8的下端固定连接。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 .
结合参见图7，在铁芯8内设置有一兼做油道的轴向内孔，轴向内孔分为三段，由上至下分别为第一孔段806、第二孔段801、第三孔段802，弹簧上座9配合安装在第一孔段806内，在弹簧上座9内设置有通油孔(图中未示出)。弹簧7设置在第二孔段801和第三孔段802中，弹簧7的上端抵住弹簧上座9，弹簧7的下端抵住阀杆5。第三孔段802的内径大于第二孔段801的内径和弹簧7的外径，起腾空作用，避免和弹簧7的外圆接触。Referring to FIG. 7 , 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. With three hole sections 802, 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 .
铁芯8的外圆由三级杆段组成，从上到下为同轴设置的第一杆段803、第二杆段804及第三杆段805，第一杆段803与滤油网支架10的内孔102导向连接，第二杆段804与电磁铁部件13的第二孔段132配合，第三杆段805与喷嘴体6 的喷嘴体内腔602导向连接。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 .
铁芯8设置两处限位台阶面，由上至下分别为第一限位台阶面807和第二限位台阶面808，第一限位台阶面807与滤油网支架10的底部激光焊接连接，第二台阶面808与喷嘴体6的上端面激光焊接连接。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. For connection, the second step surface 808 is connected to the upper end surface of the nozzle body 6 by laser welding.
结合参见图6，阀杆5的外圆主要由两级杆段组成，由上至下分别为第一杆段506及第二杆段502，第一杆段设计有环形凸起507以及两道圈槽505，中间设计有沉孔509，沉孔509底面设计有凹槽508，第二杆段502上设置有两道横孔503。阀杆5为中空结构，具有一中孔504，中孔504的顶部与沉孔509连通，在中孔504的底面设置有锥面501。两道横孔503的轴线在投影面上呈十字交叉并均与中孔504贯通。Referring to FIG. 6 , 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 , and 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 .
阀杆5安装在喷嘴体6的喷嘴体内腔602和内孔603内，其中阀杆5的第一孔段502与喷嘴体6的喷嘴体内腔602配合，阀杆5的第二孔段502与喷嘴体6的内孔603之间形成一储油腔601。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 .
电磁铁部件13内部设置两段中孔，由上至下分别为第一孔段131和第二孔段132，第一孔段134和滤油网支架10的外圆104配合，同时在滤油网支架10配合处设置O型密封圈密封12，防止外部的水进入腐蚀。第二孔段132与铁芯8的第二杆段804、喷嘴体6的外圆604配合，同时在第二孔段132与喷嘴体6的外圆604配合处设置O型密封圈14，防止外部的水进入腐蚀。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.
通过在喷嘴体6的外圆604和/或者铁芯8的第二杆段804外壁设有电磁铁部件13，电磁铁部件13驱动阀杆5，在喷嘴体6的喷嘴体内腔602和内孔603上下反复运动。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.
本发明的工作过程和原理如下：The working process and principle of the present invention are as follows:
如图1至图7所示，液体经过滤网11的过滤，后经过滤网支架10的中孔103、弹簧上座9的通油孔、铁芯8的轴向内孔、阀杆5的中孔504及两道横孔503进入到阀杆5的第二孔段502与喷嘴体6的内孔603之间的储油腔601内，然后流入阀座3的钢球承装孔304的孔壁与钢球扁方401之间的流体过流间隙处。As shown in FIGS. 1 to 7 , 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 .
在不通电时，弹簧7对阀杆5及钢球4的作用力竖直向下，液压力对阀杆5及钢球4的作用力也是竖直向下，钢球4在弹簧力及液压力的作用下紧贴阀座3 的阀座内锥面孔303中的内锥面并密封接触，此时阀座3内的过流孔302处于关闭状态。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.
当电控单元在适当的时刻给电磁铁部件13通电，使铁芯8迅速产生足够大的电磁吸力，吸合阀杆3并带动钢球4克服弹簧7的弹簧力和液压力迅速上移。当钢球4与阀座3的阀座内锥面孔303中的内锥面脱离接触后，阀座3内的过流孔302开启。When the electronic control unit energizes the electromagnet part 13 at an appropriate time, 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 . When 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.
阀座3内的过流孔302开启后，液体经过阀座3的钢球承装孔304的孔壁与钢球扁方401之间的流体过流间隙并通过阀座3内的过流孔302进入到旋流板2的分流沉孔203，后经过旋流板2的各个分流槽202、旋流板2外圆的扁方204及各旋流槽206，产生剧烈冲击并形成紊流并汇聚到旋流孔207中，最后通过喷嘴板1上的喷孔101喷出。After the flow 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.
当喷油脉宽满足要求后，电磁铁部件13在电控单元的指令下断电，电磁力消退。此时阀杆5还受到向上的液压力和向下的弹簧力的共同作用，当液压力小于弹簧力时，阀杆3和钢球4开始向下运动，弹簧7的弹簧力在阀杆3向下运动的过程中，液压力相互平衡，此时的合力仅为向下的弹簧力。弹簧7的弹簧力使阀杆3和钢球4迅速落回到阀座3的阀座内锥面孔303中的内锥面上，此时阀座3内的过流孔302又处于关闭状态，喷射结束。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. When 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. During the downward movement, 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.

Claims (10)

  1. 低液压旋流喷射器，包括电磁铁部件和由上而下依次安装在所述电磁铁部件中的进油接头、铁芯弹簧组件和喷射阀组件，所述铁芯弹簧组件包括铁芯和安装在所述铁芯内的弹簧，所述电磁铁部件驱动所述铁芯运动，所述喷射阀组件包括喷嘴体和由上之下安装在所述喷嘴体内的阀杆、钢球、阀座、旋流板和喷嘴板；所述弹簧作用在所述阀杆上；其特征在于，所述阀座内由上而下依次设置相互贯通的阀座内锥面孔、过流孔和沉孔；所述旋流板安装在所述阀座的沉孔内且所述旋流板的上表面紧贴在所述沉孔的顶面上；在所述旋流板的上表面设置有与所述过流孔贯通的分流沉孔并分布有若干内端与所述分流沉孔贯通的分流槽；所述旋流板的外圆设置有与每一分流槽外端相对应的扁方，用于流体过流通道；在所述旋流板的下表面设置有旋流沉孔并分布有若干内端与所述旋流沉孔贯通的旋流槽，每一旋流槽的外端通过对应的流体过流通道与对应的分流槽外端连通；所述喷嘴板紧贴在所述旋流板的下表面上并在所述喷嘴板上开设有一与所述旋流沉孔贯通的喷孔，用于精确控制喷射流量；所述钢球与所述阀座中的阀座内锥面孔中的内锥面密封接触与分离，以关闭和打开所述阀座内的过流孔；由所述过流孔过来的燃油通过分流沉孔和分流槽的分流，通过流体过流通道进入旋流槽内，燃油通过所述旋流槽后,产生剧烈冲击并形成紊流并汇聚到所述旋流孔中，再由喷嘴板的喷孔喷出，使得雾化颗粒粒径将得到明显提升。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 sink holes; the outer circle of the swirl plate is provided with a flat square corresponding to the outer end of each shunting groove, which is used for fluid flow. 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 connected with the swirl counterbore, and is used for In order to accurately control the injection flow; 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. 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.
  2. 根据权利要求1所述的低液压旋流喷射器，其特征在于，所述分流沉孔直径大于所述阀座中的过流孔直径。The low hydraulic swirl injector according to claim 1, wherein the diameter of the branch counterbore is larger than the diameter of the flow hole in the valve seat.
  3. 根据权利要求1所述的低液压旋流喷射器，其特征在于，所述分流槽的数量为3～6个并且在所述旋流板的上表面上呈径向延伸，同时在所述旋流板的上表面上周向均布。The low-hydraulic swirl injector according to claim 1, wherein the number of the diversion grooves is 3-6 and radially extends on the upper surface of the swirl plate, and at the same time the swirl The upper surface of the flow plate is evenly distributed in the circumferential direction.
  4. 根据权利要求3所述的低液压旋流喷射器，其特征在于，各所述扁方沿所述旋流板的周向均匀分布。The low-hydraulic swirl injector according to claim 3, wherein each of the flat sides is evenly distributed along the circumferential direction of the swirl plate.
  5. 根据权利要求4所述的低液压旋流喷射器，其特征在于，各所述旋流槽在所述旋流板的下表面上周向均匀分布。The low hydraulic swirl injector according to claim 4, wherein each of the swirl grooves is uniformly distributed on the lower surface of the swirl plate.
  6. 根据权利要求5所述的低液压旋流喷射器，其特征在于，各所述旋流槽的长度方向均与所述旋流孔相切。The low hydraulic swirl injector according to claim 5, wherein the length direction of each swirl groove is tangent to the swirl hole.
  7. 根据权利要求6所述的低液压旋流喷射器，其特征在于，各所述分流槽和各所述旋流槽均为矩形槽。The low-hydraulic swirl injector according to claim 6, wherein each of the distribution grooves and each of the swirl grooves are rectangular grooves.
  8. 根据权利要求7所述的低液压旋流喷射器，其特征在于，所述旋流板的各分流槽的通流面积之和不小于所述各旋流槽的通流面积之和。The low-hydraulic swirl injector according to claim 7, wherein the sum of the flow areas of the swirl grooves of the swirl plate is not less than the sum of the flow areas of the swirl grooves.
  9. 根据权利要求8所述的低液压旋流喷射器，其特征在于，所述旋流板的各分流槽的通流面积之和为所述喷孔板的喷孔面积之和的1.2倍以上。The low-hydraulic swirl injector according to claim 8, wherein 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.
  10. 根据权利要求9所述的低液压旋流喷射器，其特征在于，所述钢球放置在所述阀座的钢球承装孔内，所述钢球沿中心对称设置3～5个扁方，使之与所述钢球承装孔的孔壁之间形成流体过流间隙，用于流体通过。The low-hydraulic swirl injector according to claim 9, wherein the steel ball is placed in the steel ball receiving hole of the valve seat, and the steel ball is symmetrically arranged with 3 to 5 flat squares along the center. , so that a fluid flow gap is formed between it and the hole wall of the steel ball bearing hole for the fluid to pass through.
PCT/CN2021/125971 2021-03-28 2021-10-25 Low-hydraulic-pressure swirl injector WO2022205862A1 (en)

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