CN204200442U - A kind of mesopore pressure accumulation is without static leakage oil sprayer - Google Patents
A kind of mesopore pressure accumulation is without static leakage oil sprayer Download PDFInfo
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- CN204200442U CN204200442U CN201420586949.XU CN201420586949U CN204200442U CN 204200442 U CN204200442 U CN 204200442U CN 201420586949 U CN201420586949 U CN 201420586949U CN 204200442 U CN204200442 U CN 204200442U
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Abstract
The utility model discloses a kind of mesopore pressure accumulation without static leakage oil sprayer, comprise high-speed electromagnetic valve, locking swivel nut, conical surface ball-valve type switch valve, control plunger coupled parts, oil sprayer spring, spring seat, split washer, oil injector body, injector nozzle matching parts and the tight cap of oil nozzle, described conical surface ball-valve type switch valve is arranged in the cavity of oil injector body upper end; The upper end of described oil injector body is connected with high-speed electromagnetic valve by locking nut, and its lower end is connected with injector nozzle matching parts by the tight cap of oil nozzle; Described control plunger coupled parts is placed in the center hole that oil injector body arranges along axis, the center hole of described oil injector body with control plunger coupled parts and form mesopore pressure accumulation chamber.The utility model fuel injector structure is simple, and processing cost is low, is convenient to install, and improves manufacturing efficiency and conforming product rate.
Description
Technical field
The utility model relates to diesel engine of vehicle fuel injection technic field, and specifically a kind of mesopore pressure accumulation is without static leakage oil sprayer.
Background technique
High Pressure Common-Rail Fuel Inject is developed to tackle Europe more than three to discharge, and has become the mainstream technology of diesel fuel system.At present, three major companies are mainly contained in the world in production diesel engine high-pressure co-rail system, Japan electric coating, German Bosch, U.S.'s Delphi.Under the energy crisis background be on the rise, reduce fuel consume and the development new energy power of automobile, engine technology is obviously the most key; Along with the requirement of emission standard is more and more higher, the development of diesel combustion technology must be promoted, and on domestic market, diesel engine major part uses traditional mechanical type oil-fired system, is badly in need of upgrading, to meet new emission standard requirement.High pressure common rail fuel injection system significantly can improve performance, the reduction discharge of diesel engine.High pressure co-rail system achieves pressure and sets up and being separated of course of injection, thus makes control procedure have more flexibility, can realize the accurate control of little oil mass more accurately, better realize multi-injection.
At present, the core technology of domestic common rail system is that oil sprayer changes single-stage plunger coupled parts mesopore pressure accumulation structure into by the structure of the original elongated oil duct of two-stage plunger couple.The elongated oil duct oil sprayer of traditional two-stage plunger couple, leakage rate is large, and oil consumption is higher, CO2 discharge is large, and environmental pollution is serious, causes energy waste, matching part abrasion is serious, improve product cost after increasing coating, adopt conical surface balancing valve structure, oil sprayer less reliable, high to the sensitive requirements of fuel oil turbidity test, the pressure surge of elongated oil duct oil supply structure is comparatively large, and the pressure loss is large, causes fuel consumption rate to increase.After changing single-stage plunger coupled parts into, the fluid power without two plungers is poor, and the speed that plunger is opened significantly reduces, and the speed of closedown improves greatly, and injection rate presents " boot-shaped ", has met first slow rear anxious eject request.But the single-stage plunger coupled parts mesopore pressure accumulation structure fuel injector structure of introducing technology is very complicated, and processing cost is high, requires also very high to turbidity test simultaneously, be unfavorable for oil sprayer mass production.
Summary of the invention
The purpose of this utility model is for the deficiencies in the prior art, provides a kind of mesopore pressure accumulation without static leakage oil sprayer.This mesopore pressure accumulation controls without static leakage oil sprayer fluid power control chamber that plunger and conical surface ball-valve type switch form and oil injector body center bore is hyperbaric chamber, do not have fluid power poor between the two when not oil spout, so there is no high pressure difference between couple, there is not fuel leakage; The mesopore of needle-valve body communicates with vestibule in oil injector body, is high-voltage oil cavity, between there is not pressure difference, so gap also can not produce high-pressure leakage between oil nozzle couple.This mesopore pressure accumulation is simple without static leakage fuel injector structure, and processing cost is low, is convenient to install, and improves manufacturing efficiency and conforming product rate, improves the sealing reliability of oil sprayer, reduce fuel oil turbidity test receptance.
The purpose of this utility model is achieved through the following technical solutions: a kind of mesopore pressure accumulation, without static leakage oil sprayer, comprises high-speed electromagnetic valve, locking swivel nut, conical surface ball-valve type switch valve, controls plunger coupled parts, oil sprayer spring, spring seat, split washer, oil injector body, injector nozzle matching parts and the tight cap of oil nozzle; Described high-speed electromagnetic valve is placed in the cavity of oil injector body upper end, is connected with oil injector body threaded upper ends; Described high-speed electromagnetic valve comprises oil return screw, pretightening force adjustment pad, solenoid valve spring, magnetic head injection moulding assembly, electromagnetism needle assembly and armature reset spring; Described oil return screw is connected with magnetic head injection moulding assembly threaded upper ends, and the oil return screw the other end installs back oil pipe; Described solenoid valve spring is arranged in magnetic head injection moulding assembly center hole, and one end is spacing by oil return screw, and the other end adjusts pad by pretightening force and locates; Described electromagnetism needle assembly is placed in magnetic head injection moulding assembly lower center hole; Described conical surface ball-valve type switch valve is arranged at high-speed electromagnetic valve lower end, is placed in the cavity of oil injector body upper end; Conical surface ball-valve type switch valve comprises ball valve seat, steel ball and modulating valve; Described ball valve seat one end contacts with electromagnetism needle assembly and connects, the other end contacts with steel ball and connects, the described steel ball the other end and described modulating valve are tightly connected, described modulating valve and steel ball sealing side are provided with cone tank, taper grain upper end is tightly connected with locking swivel nut, and the described modulating valve the other end is connected with control plunger coupled parts; Described control plunger coupled parts is arranged in the center hole of oil injector body oil inlet end, control plunger coupled parts to comprise control sleeve, control plunger and connecting sleeve, described control plunger at one end be inserted in control in sleeve and with control sleeve Spielpassung, matching gap is between 0.002-0.003mm, the other end to be inserted in connecting sleeve and with connecting sleeve interference fit, length of thread engagement is 5-6mm; Described control plunger and conical surface ball-valve type switch valve form fluid power control chamber, control plunger and are provided with oil sprayer spring, and oil sprayer spring one end is located by controlling sleeve, and the other end is located by spring seat; Described control plunger is set to multidiameter shaft along axis, controls to be provided with draw-in groove in the middle part of plunger, and described split washer is placed in draw-in groove, is located spring seat lower end; Described injector nozzle matching parts is arranged on oil injector body lower end by the tight cap of oil nozzle, and the nozzle opening of injector nozzle matching parts is communicated with oil injector body internal galleries.
Described oil return screw outside becomes stepped cylindrical shape, and middle part is provided with outside thread, and upper end cylindrical is provided with two symmetrical crescent shape groovings, for installing back oil pipe jump ring, being provided with two symmetries cutting flat with described grooving vertical surface; Described oil return screw is provided with ladder oil return center hole along axis.
Described magnetic head injection moulding assembly comprises magnetic core, magnetic head, needle guide sleeve, locking nut, coil, lead-in wire and O RunddichtringO; Described magnetic core, magnetic head and needle guide sleeve form magnetic head assembly; Described magnetic head is placed in described magnetic core upper end, and is welded as a whole, and described magnetic head is provided with center hole along axis, and upper end is provided with internal thread and is connected with oil return screw thread; Be provided with ledges in the middle part of described magnetic head, ledges upper end contacts with locking nut interior edge face, limiting lock jack panel position, and described ledges lower end is provided with clearance groov; Described magnetic core and magnetic head both sides are provided with vertical straight through hole, and described coil, lead-in wire and the injection moulding of O RunddichtringO are in clear opening; Described magnetic core is provided with center hole, and described needle guide sleeve is placed in core center hole and magnetic head lower center hole.
Described electromagnetism needle assembly upper end is inserted in needle guide sleeve center hole, and lower end is inserted in locking swivel nut center hole, and with needle guide sleeve Spielpassung; Described electromagnetism needle assembly is made up of electromagnetism needle, armature and armature back-up ring, described electromagnetism needle is provided with non-straight-through conical central hole along axis, middle part is provided with the shaft shoulder and conflicts with armature and be connected, the lower end of electromagnetism needle is successively through armature and armature back-up ring central through bore, electromagnetism needle and armature are Spielpassung, be interference fit with armature back-up ring, armature and armature back-up ring are welded as a whole, and armature reset spring is placed between locking swivel nut and armature.
Described oil injector body upper end is designed to inner cavity; Described inner cavity upper end is provided with O RunddichtringO groove, by O RunddichtringO by high speed electromagnetic valve seal; Be provided with internal thread in the middle part of described inner cavity to be connected with locking screw thread die cutting, described inner cavity bottom end face and modulating valve are tightly connected, and are provided with ear type ditch grain bottom described inner cavity.
The lower end surface of described oil injector body inner cavity is from top to bottom provided with the center hole be ladder-like arranged successively along axis, described oil injector body ladder center hole forms mesopore pressure accumulation chamber with control plunger coupled parts.
In the middle part of described oil injector body, position on the upper side is provided with oil inlet pipe threaded mounting hole, described oil inlet pipe threaded mounting hole lower end is provided with oil inlet hole, oil inlet pipe threaded mounting hole is communicated with oil injector body ladder center hole by described oil inlet hole, described oil inlet hole and oil inlet pipe threaded mounting hole bias; Described oil injector body lower end surface is provided with two positioning pin holes.
Described locking screw cover is arranged in oil injector body inner cavity, and described locking swivel nut and modulating valve seal side and be circumferentially laid with three oil return transitional pores, and described oil return transitional pore upper end is provided with meter out hole; Described locking swivel nut excircle is provided with screw thread, and be threaded with oil injector body inner cavity compression modulating valve; Described locking swivel nut is set to interior hexagonal structure along axis.
Be provided with omoplate face in the middle part of described modulating valve, be connected with the upper end end face gluing, sealing of described control sleeve; Described modulating valve is provided with extension part with the center, side controlling sleeve connection, and the extension part of described modulating valve is inserted in the upper end end-face central hole of control sleeve.
Be provided with bottom described modulating valve cone tank along control quill to First Transition oilhole, First Transition oilhole lower end is provided with the fuel-displaced throttle orifice being communicated with fluid power control chamber and low-pressure cavity, is provided with the second transition oilhole between fuel-displaced throttle orifice and fluid power control chamber; Described control sleeve is provided with the meter in hole being communicated with fluid power control chamber and mesopore pressure accumulation chamber.
Described oil injector body center hole, First Transition oilhole, fuel-displaced throttle orifice, the second transition oilhole and control plunger axis conllinear.
Adjustment pad is provided with between described oil injector body upper-end surface and magnetic head injection moulding assembly.
Described injector nozzle matching parts is made up of needle-valve body and needle-valve, described needle-valve body is provided with center hole along axis, described needle-valve is inserted in needle-valve body center hole, and is slidably connected in needle-valve body center bore inner wall, the excircle that described needle-valve and needle-valve body are slidably connected is cut vertically flat.
The excircle that described needle-valve and needle-valve body are slidably connected is evenly equipped with three vertically to be cut flat, cuts flat and encloses three flat formula oil inlet passages with needle-valve body center bore inner wall for three of needle-valve.
The profile of described needle-valve body is two ladder round shape, and major diameter end face is provided with two positioning pin holes, is located by connecting by two locating studs and oil injector body small end face, and its large outside diameter is φ 12.5.
The tight cap internal thread of described oil nozzle is M14 × 1, and wall thickness is 2mm.
Advantage of the present utility model and beneficial effect are:
1. the utility model injector assembly optimizes fuel injector structure, ensure assembly process advantages of simple more, the better excellence of sealing effect of oil sprayer, reduce its susceptibility to fuel oil turbidity test, improve the reliability of oil sprayer, the performance of motor can be improved and extend common rail system working life within the engine, more be conducive to the accurate control of course of injection, make fuel injection quantity conformity better, oil sprayer work whole process mesohigh fuel flow communication smoothly, make oil inflame more fully good simultaneously, optimize exhaust index.
2. the utility model adopts mesopore pressure accumulation without static leakage structure, directly passes in oil sprayer mesopore pressure accumulation chamber from common rail pipe high pressure fuel out through oil injector body oil inlet hole.Control the middle vestibule of fluid power control chamber that plunger and conical surface ball-valve type switch form and oil injector body center bore, needle-valve body, be high-voltage oil cavity, control plunger coupled parts, needle-valve are all surrounded by high pressure fuel, pressure difference is there is not in couple between gap, static fuel leakage can not be produced, dynamic leakage amount reduces, thus reduces oil consumption, decreases CO2 discharge amount; Mesopore pressure accumulation structure, makes the pressure loss reduce, and is equivalent to the jet pressure that improve oil sprayer.
3. the utility model armature back-up ring and electromagnetism needle are welded as a whole, armature reset spring is placed between locking swivel nut and armature, the buffering in armature closing process and reset can be realized, reduce the impact to conical surface ball-valve type switch, improve the global reliability of oil sprayer.
4. the weldering of the utility model electromagnetism needle is provided with conical central hole along axis, alleviates electromagnetism needle weight, electromagnetism needle is moved downward and greatly reduces conical surface ball-valve type switch impact force, thus substantially increase the reliability of oil sprayer.
5. the utility model adopts oil return screw and magnetic head injection moulding assembly split-type structural, first pretightening force being adjusted pad and solenoid valve spring loads in magnetic head center hole by magnetic head injection moulding assembly upper end, again oil return screw is loaded, screw up with a wrench oil return screw, magnetic head difficulty of processing is reduced, magnetic head injection moulding assembly Shooting Technique improves, and injector assembly assembling is more simple to operation.
6. the utility model pretightening force adjustment pad and spring seat had both played limit spring effect, played the effect of adjustment initial tension of spring simultaneously, made a part play double action, enormously simplify fuel injector structure, reduce product cost.
7. the utility model oil injector body oil inlet hole adopts arranged off-centre mode, high pressure fuel is made to enter in oil sprayer mesopore pressure accumulation chamber by oil inlet hole, form even liquid stream, fuel flow in mesopore pressure accumulation chamber is stablized, reduce fuel flow perturbation, improve the reliability of oil sprayer, optimize oil sprayer performance.
8. the utility model adopts split type control sleeve, and positioning precision is guaranteed, and technology capability improves, and difficulty of processing reduces, and reduces processing cost, improves manufacturing efficiency and conforming product rate.
9. the utility model control plunger adopts lift spacing, reduces turn-off delay time, improves fuel injection quantity precision; Reduce the forefront pressure of fuel-displaced throttle orifice simultaneously, reduce recirculating oil quantity further, reduce return oil pressure susceptibility.
10. the utility model controls plunger and adopts shaping centreless grinding technique, and two two, cylndrical surface end face grindings complete, and ensure that the required precision of coaxality, circularity, straightness accuracy, reduce processing cost, improve manufacturing efficiency and conforming product rate.
11. the utility model adopt the flat formula fuel gallery of needle-valve three, and from the flat oil-feed of needle-valve three, processing is simple, and requirement on machining accuracy is low, and needle-valve is not easy hair fastener, function admirable.
12. the utility model adopt the needle-valve body of minor diameter cylindrical, and the large outside diameter of needle-valve body changes to φ 12.5 by the φ 14.3 of conventional construction, and itself and oil injector body sealing area are reduced, and sealing effect strengthens.The tight cap internal thread of oil nozzle changes M14 × 1 into by M16 × 0.5 of conventional construction, and wall thickness is enlarged to 1.5mm, and amount of deformation is reduced, also make sealing effect strengthen.
13. the utility model are conducive to controlling, and be convenient to investigate fault, renewal part is saved time and cost.
Accompanying drawing explanation
Fig. 1 is the utility model fuel injector structure schematic diagram;
Fig. 2 is Fig. 1 partial enlarged view;
Fig. 3 is oil injector body inlet hole structure schematic diagram;
Fig. 4 is for controlling plunger coupled parts structural representation;
Fig. 5 is magnetic head injection moulding assembly structure schematic diagram;
Fig. 6 is solenoid valve needle construction schematic diagram;
Fig. 7 is needle valve structure schematic diagram;
Fig. 8 is needle valve structure schematic diagram;
In figure: 1 is oil return screw, 2 is pretightening force adjustment pad, 3 is solenoid valve spring, 4 is magnetic head injection moulding assembly, 5 is adjustment pad, 6 is electromagnetism needle assembly, 7 is armature reset spring, 8 is locking swivel nut, 8a is oil return transitional pore, 8b is meter out hole, 9 is ball valve seat, 10 is steel ball, 11 is modulating valve, 11a First Transition oilhole, 11b is fuel-displaced throttle orifice, 11c is the second transition oilhole, 12 is oil injector body, 12a is oil inlet pipe threaded mounting hole, 12b is oil inlet hole, 13 is mesopore pressure accumulation chamber, 14 for controlling sleeve, 14a is meter in hole, 15 for controlling plunger, 16 is connecting sleeve, 17 is oil sprayer spring, 18 is spring seat, 19 is split washer, 20 is the tight cap of oil nozzle, 21 is needle-valve body, 22 is needle-valve, 23 is magnetic core, 24 is magnetic head, 24a is magnetic head center hole, 25 is needle guide sleeve, 26 is locking nut, 27 is coil, 28 is lead-in wire, 29 is O RunddichtringO, 30 is magnetic head assembly, 31 is electromagnetism needle, 32 is armature, 33 is armature back-up ring, 34 is fluid power control chamber, 35 is three flat formula oil inlet passages.
Embodiment
Below in conjunction with accompanying drawing, the utility model is further described.
As Figure 1-4, the utility model mesopore pressure accumulation, without static leakage oil sprayer, comprises high-speed electromagnetic valve, locking swivel nut 8, conical surface ball-valve type switch valve, controls the tight cap 20 of plunger coupled parts, oil sprayer spring 17, spring seat 18, split washer 19, oil injector body 12, injector nozzle matching parts and oil nozzle; Described high-speed electromagnetic valve is placed in the cavity of oil injector body 12 upper end, is connected with oil injector body 12 threaded upper ends; Described high-speed electromagnetic valve comprises oil return screw 1, pretightening force adjustment pad 2, solenoid valve spring 3, magnetic head injection moulding assembly 4, electromagnetism needle assembly 6 and armature reset spring 7; Described oil return screw 1 is connected with magnetic head injection moulding assembly 4 threaded upper ends, and oil return screw 1 the other end installs back oil pipe; Described solenoid valve spring 3 is arranged in magnetic head injection moulding assembly 4 center hole, and one end is spacing by oil return screw 1, and the other end adjusts pad 2 by pretightening force and locates; Described pretightening force adjustment pad 2 had both played spacing solenoid valve spring 3 and had acted on, and played again the effect of adjustment solenoid valve spring force; Described electromagnetism needle assembly 6 is placed in magnetic head injection moulding assembly 4 lower center hole; Described conical surface ball-valve type switch valve is arranged at high-speed electromagnetic valve lower end, is placed in the cavity of oil injector body 12 upper end; Conical surface ball-valve type switch valve comprises ball valve seat 9, steel ball 10 and modulating valve 11; Described ball valve seat 9 one end contacts with electromagnetism needle assembly 6 and connects, the other end contacts with steel ball 10 and connects, described steel ball 10 the other end and described modulating valve 11 are tightly connected, described modulating valve 11 is provided with cone tank with steel ball 10 sealed sides, taper grain upper end is tightly connected with locking swivel nut 8, and described modulating valve 11 the other end is connected with control plunger coupled parts; Be linear contact lay when steel ball 10 and conical surface seal, sealing effect is guaranteed; In addition, in switch repeatedly, steel ball 10 can freely rotate, take a seat at every turn sealing time actual contact position random, make the wearing and tearing of steel ball 10 relatively uniform, abrasion resistance improves, and the sealing reliability of oil sprayer is strengthened; Described control plunger coupled parts is arranged in the center hole of oil injector body 12 oil inlet end, control plunger coupled parts to comprise control sleeve 14, control plunger 15 and connecting sleeve 16, described control plunger 15 one end be inserted in control in sleeve 14 and with control sleeve 14 Spielpassung, matching gap is between 0.002-0.003mm, the other end to be inserted in connecting sleeve 16 and with connecting sleeve 16 interference fit, length of thread engagement is 5-6mm; Described control plunger 15 forms fluid power control chamber 34 with conical surface ball-valve type switch valve, and control plunger 15 and be provided with oil sprayer spring 17, oil sprayer spring 17 one end is located by controlling sleeve 14, and the other end is located by spring seat 18; Described control plunger 15 is set to multidiameter shaft along axis, controls to be provided with draw-in groove 15b in the middle part of plunger 15, and described split washer 19 is placed in draw-in groove 15b, is located spring seat 18 lower end; Described spring seat 18 plays position-limiting action to described oil sprayer spring 17 one end, plays again the effect of adjustment oil sprayer initial tension of spring simultaneously; Described injector nozzle matching parts is arranged on oil injector body 12 lower end by the tight cap 20 of oil nozzle, and the nozzle opening of injector nozzle matching parts is communicated with oil injector body 12 internal galleries.
Described oil return screw 1 outside becomes stepped cylindrical shape, and middle part is provided with outside thread; Described oil return screw 1 upper end cylindrical is provided with two symmetrical crescent shape groovings, for installing back oil pipe jump ring, being provided with two symmetries cutting flat with described grooving vertical surface; Described oil return screw 1 is provided with ladder oil return center hole along axis.
As shown in Figure 5, described magnetic head injection moulding assembly 4 comprises magnetic core 23, magnetic head 24, needle guide sleeve 25, locking nut 26, coil 27, lead-in wire 28 and O RunddichtringO 29; Described magnetic core 23, magnetic head 24, needle guide sleeve 25 form magnetic head assembly 30; Described magnetic head 24 is placed in described magnetic core 23 upper end, and is welded as a whole, and described magnetic head 24 is provided with center hole 24a along axis, and upper end is provided with internal thread and is threaded with oil return screw 1; Be provided with ledges in the middle part of described magnetic head 24, ledges upper end contacts with locking nut 26 interior edge face, limiting lock jack panel 26 position, and described ledges lower end is provided with clearance groov; Described magnetic core 23 and magnetic head 24 both sides are provided with vertical straight through hole, and described coil 27, lead-in wire 28 and O RunddichtringO 29 injection moulding are in clear opening; Described magnetic core 23 is provided with center hole, and described needle guide sleeve 25 is placed in magnetic core 23 center hole and magnetic head 24 lower center hole.
Described electromagnetism needle assembly 6 upper end is inserted in needle guide sleeve 25 center hole, and lower end is inserted in locking swivel nut 8 center hole, and with needle guide sleeve 25 Spielpassung, play axially directed effect by needle guide sleeve 25, described electromagnetism needle assembly 6 is made up of electromagnetism needle 31, armature 32 and armature back-up ring 33, and described electromagnetism needle 31 is provided with non-straight-through conical central hole along axis, alleviates the weight of electromagnetism needle 31, thus reduces electromagnetism needle assembly 6 pairs of conical surface percussions, middle part is provided with the shaft shoulder and conflicts with armature 32 and be connected, the lower end of described electromagnetism needle 31 is successively through armature 32 and armature back-up ring 33 central through bore, electromagnetism needle 31 and armature 32 are Spielpassung, be interference fit with armature back-up ring 33, armature reset spring 7 is placed between locking swivel nut 8 and armature 32, by armature 32 and electromagnetism needle 31 are made Spielpassung, relatively-movable two parts, and undertaken spacing by the lower dead center that armature back-up ring 33 pairs of armature 32 move, armature 32 return is given with armature reset spring 7, thus reduce solenoid valve impact to conical surface ball-valve type switch in closing process, improve the reliability of oil sprayer.
Described oil injector body 12 upper end is designed to inner cavity, is placed in cavity, reduces oil sprayer overall length, make fuel injector structure compact by described solenoid valve parts thereof, and reliability strengthens; Described inner cavity upper end is provided with O RunddichtringO groove, by O RunddichtringO by high speed electromagnetic valve seal, be provided with internal thread in the middle part of described inner cavity to be connected with locking screw thread die cutting, described inner cavity bottom end face and modulating valve are tightly connected, and are provided with ear type ditch grain bottom described inner cavity.
The lower end surface of described oil injector body 12 inner cavity is from top to bottom provided with the center hole be ladder-like arranged successively along axis, described oil injector body 12 ladder center hole forms mesopore pressure accumulation chamber 13 with control plunger coupled parts.
In the middle part of described oil injector body 12, position on the upper side is provided with oil inlet pipe threaded mounting hole 12a, described oil inlet pipe threaded mounting hole lower end is provided with oil inlet hole 12b, oil inlet pipe threaded mounting hole 12a is communicated with oil injector body 12 ladder center hole by described oil inlet hole 12b, described oil inlet hole 12b and described oil inlet pipe threaded mounting hole 12a is eccentric, oil inlet hole 12b adopts arranged off-centre mode, high pressure fuel is made to enter in oil sprayer mesopore pressure accumulation chamber 13 by oil inlet hole, form even liquid stream, fuel flow in mesopore pressure accumulation chamber 13 is stablized, reduce fuel flow perturbation, improve the reliability of oil sprayer, optimize oil sprayer performance.Described oil injector body 12 lower end surface is provided with two positioning pin holes.
Described locking swivel nut 8 is arranged in oil injector body 12 inner cavity, described locking swivel nut 8 seals side with modulating valve 11 and is circumferentially laid with three oil return transitional pore 8a, described oil return transitional pore 8a upper end is provided with meter out hole 8b, adopt oil return transitional pore and meter out hole structure mode, establish return oil pressure, be conducive to preventing bubble from producing, not easily produce cavitation pitting, improve the reliability of oil sprayer, extend oil sprayer working life; Described locking swivel nut 8 excircle is provided with screw thread, and being threaded with oil injector body 12 inner cavity compresses modulating valve 11, ensures oil sprayer sealing reliability; Described locking swivel nut 8 is set to interior hexagonal structure along axis, is convenient to inner installation.
Be provided with omoplate face in the middle part of described modulating valve 11, be connected with the upper end end face gluing, sealing of described control sleeve 14, two seal faces are become a seal face, ensure that the sealing in fluid power control chamber 34 and hollow pressure accumulation chamber 13; The center, side that described modulating valve 11 is connected with control sleeve 14 is provided with extension part, and the extension part of described modulating valve 11 is inserted in the upper end end-face central hole of control sleeve 14.
The First Transition oilhole 11a along controlling sleeve 14 axis is provided with bottom described modulating valve 11 cone tank, First Transition oilhole 11a lower end is provided with the fuel-displaced throttle orifice 11b being communicated with fluid power control chamber 34 and low-pressure cavity, be provided with the second transition oilhole 11c between fuel-displaced throttle orifice 11b and fluid power control chamber 34, described control sleeve 14 is provided with the meter in hole 14a being communicated with fluid power control chamber 34 and hollow pressure accumulation chamber 13.
Described oil injector body 12 ladder center hole, the First Transition oilhole 11a of modulating valve 11, fuel-displaced throttle orifice 11b, the second transition oilhole 11c and control plunger 15 axis collinear.
Be provided with between described oil injector body 12 upper-end surface and magnetic head injection moulding assembly 4 and adjust pad 5.
As shown in figs 6-8, described injector nozzle matching parts is made up of needle-valve body 21 and needle-valve 22, and described needle-valve body 21 is provided with center hole along axis, and described needle-valve 22 is inserted in needle-valve body 21 center hole, and is slidably connected in needle-valve body 21 center bore inner wall; The excircle that described needle-valve 22 and needle-valve body 21 are slidably connected is evenly equipped with three vertically to be cut flat, and three of needle-valve 22 cut flat, and to enclose the three flat oil-feeds of flat formula oil inlet passage 35, three pressure distribution in the circumferential more even with needle-valve body 21 center bore inner wall; Needle-valve 22 and needle-valve body 21 radial direction only play the guiding role, and do not seal, guide portion length is 16mm, and guiding clearance is 6-8 μm, so needle-valve 22 amplifies with the matching gap of needle-valve body 21, weaken the receptance to fuel oil turbidity test; Reduce the processing request of the cylndrical surface that needle-valve 22 coordinates with needle-valve body 21, processing cost is reduced, manufacturing efficiency and conforming product rate improve.
The profile of described needle-valve body 21 is two ladder round shape, and major diameter end face is provided with two positioning pin holes, and be located by connecting by two locating studs and oil injector body 12 small end face, its large outside diameter is φ 12.5; Owing to eliminating eccentric oil duct, only arrange two positioning pin holes, reduce the large outside diameter of needle-valve body 21, the area of seal face is reduced, enhances the sealing reliability of oil sprayer.
Described oil nozzle tight cap 20 internal thread is M14 × 1, and wall thickness is 2mm; Diminished by the large outside diameter of needle-valve body 21, the connecting thread of the tight cap 20 of oil nozzle and oil injector body 12 is reduced, the wall thickness of the tight cap 20 of oil nozzle increases, and improves the rigidity of the tight cap 20 of oil nozzle.
Working principle of the present utility model is:
During work, external high pressure fuel oil enters oil injector body 12 oil inlet hole 12b from inlet connector component upper ends, flow in oil injector body 12 mesopore by oil inlet hole 12b, part high pressure oil flows in oil nozzle couple internal galleries and nozzle opening by oil injector body 12 mesopore, and another part high pressure oil is entered in fluid power control chamber 34 along control sleeve 14 cross transition oilhole, meter in hole 14a by oil injector body 12 mesopore.
When high-speed electromagnetic valve is not energized, electromagnetism needle 31 compresses ball valve seat 9 downwards under solenoid valve spring 3 active force, ball valve seat 9 compresses steel ball 10, modulating valve 11 outlet end First Transition oilhole 11a blocked by steel ball 10, thus set up certain high pressure in modulating valve 11 fuel-displaced throttle orifice 11b lower end, make below control plunger 15 and be subject to downward hydraulic coupling and pass to needle-valve 22, make needle-valve 22 be pressed on needle-valve body 21 sealed seat surface, oil nozzle is in closed condition, oil sprayer not oil spout.
Due to identical with the fuel pressure in fluid power control chamber 34 in mesopore pressure accumulation chamber 13, so the high pressure fuel in fluid power control chamber flows in mesopore pressure accumulation chamber 13 without the gap controlled between sleeve 14 and control plunger 15, simultaneously, high pressure fuel in needle-valve body 21 in vestibule can not flow in oil sprayer mesopore pressure accumulation chamber 13 by the gap between needle-valve 22 and needle-valve body 21, so fuel pressure reaches 160MPa, can not high pressure fuel leak be produced in oil injector body 12 inside, thus decrease oil sprayer dynamic leakage amount.
When solenoid valves, produce electromagnetic force, adhesive armature 32 is up moved, due to electromagnetism needle 31, armature back-up ring 33 is welded as integrated type, armature 32 moves upward and can be with moving electromagnetic valve pin 31, armature back-up ring 32 also moves upward thereupon, electromagnetism needle 31 and ball valve seat 9 depart from, up lift under steel ball 10 fluid power control chamber 34 inner high voltage power effect thereunder, fluid power control chamber 34 inner high voltage is released, under system high pressure effect, thus make the control plunger 15 of below, needle-valve 22 can up lift, oil nozzle injected fuel, oil sprayer completes normal injection, high pressure fuel becomes low-voltage fuel after modulating valve 11 second transition oilhole 11c simultaneously, through locking swivel nut 8 oil return transitional pore 8a, meter out hole 8b enters in solenoid valve low pressure oil pocket, oil return work is completed by oil return screw 1.
When after solenoid valve power-off, electromagnetic force is eliminated, electromagnetism needle assembly is taken a seat under the active force of solenoid valve spring 3, owing to being provided with armature reset spring 7 between armature 31 lower end surface and locking swivel nut 8, armature reset spring 7 carries the quality of electromagnetism needle assembly 6, armature reset spring 7 is in its pre-compressed state, armature 8 is made to take a seat in process, armature reset spring 6 can continue to slow down electromagnetism needle assembly and to take a seat impact force, improve the reliability of common-rail injector, armature 32 is taken a seat, electromagnetism needle 31 compresses ball valve seat 9, steel ball 10 is taken a seat, formed with modulating valve 11 cone tank and seal, high pressure is formed in fluid power control chamber 34, control plunger 15 to fall after rise under spring force, by downward force transmission to needle-valve 22, needle-valve 22 is taken a seat, stop oil spout.
Claims (16)
1. mesopore pressure accumulation is without a static leakage oil sprayer, it is characterized in that: comprise high-speed electromagnetic valve, locking swivel nut (8), conical surface ball-valve type switch valve, control plunger coupled parts, oil sprayer spring (17), spring seat (18), split washer (19), oil injector body (12), injector nozzle matching parts and the tight cap of oil nozzle (20); Described high-speed electromagnetic valve is placed in the cavity of oil injector body (12) upper end, is connected with oil injector body (12) threaded upper ends; Described high-speed electromagnetic valve comprises oil return screw (1), pretightening force adjustment pad (2), solenoid valve spring (3), magnetic head injection moulding assembly (4), electromagnetism needle assembly (6) and armature reset spring (7); Described oil return screw (1) is connected with magnetic head injection moulding assembly (4) threaded upper ends, and oil return screw (1) the other end installs back oil pipe; Described solenoid valve spring (3) is arranged in magnetic head injection moulding assembly (4) center hole, and one end is spacing by oil return screw (1), and the other end adjusts pad (2) by pretightening force and locates; Described electromagnetism needle assembly (6) is placed in magnetic head injection moulding assembly (4) lower center hole; Described conical surface ball-valve type switch valve is arranged at high-speed electromagnetic valve lower end, is placed in the cavity of oil injector body (12) upper end; Conical surface ball-valve type switch valve comprises ball valve seat (9), steel ball (10) and modulating valve (11); Described ball valve seat (9) one end contacts with electromagnetism needle assembly (6) and connects, the other end contacts with steel ball (10) and connects, described steel ball (10) the other end and described modulating valve (11) are tightly connected, described modulating valve (11) and steel ball (10) sealed sides are provided with cone tank, taper grain upper end is tightly connected with locking swivel nut (8), and described modulating valve (11) the other end is connected with control plunger coupled parts; Described control plunger coupled parts is arranged in the center hole of oil injector body (12) oil inlet end, control plunger coupled parts to comprise control sleeve (14), control plunger (15) and connecting sleeve (16), described control plunger (15) one end be inserted in control in sleeve (14) and with control sleeve (14) Spielpassung, matching gap is between 0.002-0.003mm, the other end to be inserted in connecting sleeve (16) and with connecting sleeve (16) interference fit, length of thread engagement is 5-6mm; Described control plunger (15) and conical surface ball-valve type switch valve form fluid power control chamber (34), control plunger (15) and be provided with oil sprayer spring (17), oil sprayer spring (17) one end is located by controlling sleeve (14), and the other end is located by spring seat (18); Described control plunger (15) is set to multidiameter shaft along axis, control plunger (15) middle part and be provided with draw-in groove (15b), described split washer (19) is placed in draw-in groove (15b), is located spring seat (18) lower end; Described injector nozzle matching parts is arranged on oil injector body (12) lower end by the tight cap of oil nozzle (20), and the nozzle opening of injector nozzle matching parts is communicated with oil injector body (12) internal galleries.
2. mesopore pressure accumulation according to claim 1 is without static leakage oil sprayer, it is characterized in that: described oil return screw (1) outside becomes stepped cylindrical shape, middle part is provided with outside thread, upper end cylindrical is provided with two symmetrical crescent shape groovings, for installing back oil pipe jump ring, being provided with two symmetries with described grooving vertical surface and cutting flat; Described oil return screw (1) is provided with ladder oil return center hole along axis.
3. mesopore pressure accumulation according to claim 1 is without static leakage oil sprayer, it is characterized in that: described magnetic head injection moulding assembly (4) comprises magnetic core (23), magnetic head (24), needle guide sleeve (25), locking nut (26), coil (27), lead-in wire (28) and O RunddichtringO (29); Described magnetic core (23), magnetic head (24) and needle guide sleeve (25) form magnetic head assembly (30); Described magnetic head (24) is placed in described magnetic core (23) upper end, and be welded as a whole, described magnetic head (24) is provided with center hole (24a) along axis, and upper end is provided with internal thread and is threaded with oil return screw (1); Described magnetic head (24) middle part is provided with ledges, and ledges upper end contacts with locking nut (26) interior edge face, limiting lock jack panel (26) position, and described ledges lower end is provided with clearance groov; Described magnetic core (23) and magnetic head (24) both sides are provided with vertical straight through hole, and described coil (27), lead-in wire (28) and O RunddichtringO (29) injection moulding are in clear opening; Described magnetic core (23) is provided with center hole, and described needle guide sleeve (25) is placed in magnetic core (23) center hole and magnetic head (24) lower center hole.
4. mesopore pressure accumulation according to claim 3 is without static leakage oil sprayer, it is characterized in that: described electromagnetism needle assembly (6) upper end is inserted in needle guide sleeve (25) center hole, lower end be inserted in locking swivel nut (8) center hole in, and with needle guide sleeve (25) Spielpassung, described electromagnetism needle assembly (6) is by electromagnetism needle (31), armature (32) and armature back-up ring (33) composition, described electromagnetism needle (31) is provided with non-straight-through conical central hole along axis, middle part is provided with the shaft shoulder and conflicts with armature (32) and be connected, the lower end of electromagnetism needle (31) is successively through armature (32) and armature back-up ring (33) central through bore, electromagnetism needle (31) and armature (32) are Spielpassung, be interference fit with armature back-up ring (33), armature (32) and armature back-up ring (33) are welded as a whole, armature reset spring (7) is placed between locking swivel nut (8) and armature (32).
5. mesopore pressure accumulation according to claim 1 is without static leakage oil sprayer, it is characterized in that: described oil injector body (12) upper end is designed to inner cavity; Described inner cavity upper end is provided with O RunddichtringO groove, by O RunddichtringO by high speed electromagnetic valve seal; Be provided with internal thread in the middle part of described inner cavity to be threaded with locking swivel nut (8), described inner cavity bottom end face and modulating valve (11) are tightly connected, and are provided with ear type ditch grain bottom described inner cavity.
6. mesopore pressure accumulation according to claim 5 is without static leakage oil sprayer, it is characterized in that: the lower end surface of described oil injector body (12) inner cavity is from top to bottom provided with the center hole be ladder-like arranged successively along axis, described oil injector body (12) ladder center hole forms mesopore pressure accumulation chamber (13) with control plunger coupled parts.
7. mesopore pressure accumulation according to claim 6 is without static leakage oil sprayer, it is characterized in that: position on the upper side, described oil injector body (12) middle part is provided with oil inlet pipe threaded mounting hole (12a), described oil inlet pipe threaded mounting hole (12a) lower end is provided with oil inlet hole (12b), oil inlet pipe threaded mounting hole (12a) is communicated with oil injector body (12) ladder center hole by described oil inlet hole (12b), and described oil inlet hole (12b) is eccentric with oil inlet pipe threaded mounting hole (12a); Described oil injector body (12) lower end surface is provided with two positioning pin holes.
8. mesopore pressure accumulation according to claim 1 is without static leakage oil sprayer, it is characterized in that: described locking swivel nut (8) is arranged in oil injector body (12) inner cavity, described locking swivel nut (8) and modulating valve (11) seal side and are circumferentially laid with three oil return transitional pores (8a), and described oil return transitional pore (8a) upper end is provided with meter out hole (8b); Described locking swivel nut (8) excircle is provided with screw thread, and being threaded with oil injector body (12) inner cavity compresses modulating valve (11); Described locking swivel nut (8) is set to interior hexagonal structure along axis.
9. mesopore pressure accumulation according to claim 1 is without static leakage oil sprayer, it is characterized in that: described modulating valve (11) middle part is provided with omoplate face, is connected with the upper end end face gluing, sealing of described control sleeve (14); The center, side that described modulating valve (11) is connected with control sleeve (14) is provided with extension part, and the extension part of described modulating valve (11) is inserted in the upper end end-face central hole of control sleeve (14).
10. mesopore pressure accumulation according to claim 9 is without static leakage oil sprayer, it is characterized in that: be provided with along controlling the axial First Transition oilhole (11a) of sleeve (14) bottom described modulating valve (11) cone tank, First Transition oilhole (11a) lower end is provided with and is communicated with fluid power control chamber (34) and the fuel-displaced throttle orifice (11b) of low-pressure cavity, is provided with the second transition oilhole (11c) between fuel-displaced throttle orifice (11b) and fluid power control chamber (34); Described control sleeve (14) is provided with the meter in hole (14a) being communicated with fluid power control chamber (34) and mesopore pressure accumulation chamber (13).
11. mesopore pressure accumulations according to claim 10, without static leakage oil sprayer, is characterized in that: described oil injector body (12) center hole, First Transition oilhole (11a), fuel-displaced throttle orifice (11b), the second transition oilhole (11c) and control plunger (15) axis collinear.
12. mesopore pressure accumulations according to claim 1, without static leakage oil sprayer, is characterized in that: be provided with between described oil injector body (12) upper-end surface and magnetic head injection moulding assembly (4) and adjust pad (5).
13. mesopore pressure accumulations according to claim 1 are without static leakage oil sprayer, it is characterized in that: described injector nozzle matching parts is made up of needle-valve body (21) and needle-valve (22), (21) are provided with center hole along axis to described needle-valve body, described needle-valve (22) is inserted in needle-valve body (21) center hole, and be slidably connected in needle-valve body (21) center bore inner wall, the excircle that described needle-valve (22) and needle-valve body (21) are slidably connected is cut vertically flat.
14. mesopore pressure accumulations according to claim 13 are without static leakage oil sprayer, it is characterized in that: the excircle that described needle-valve (22) and needle-valve body (21) are slidably connected is evenly equipped with three vertically and cuts flat, cut flat and enclose three flat formula oil inlet passages (35) with needle-valve body (21) center bore inner wall for three of needle-valve (22).
15. mesopore pressure accumulations according to claim 13 or 14 are without static leakage oil sprayer, it is characterized in that: the profile of described needle-valve body (21) is two ladder round shape, and major diameter end face is provided with two positioning pin holes, be located by connecting by two locating studs and oil injector body (12) small end face, its large outside diameter is
.
16. mesopore pressure accumulations according to claim 1, without static leakage oil sprayer, is characterized in that: the tight cap of described oil nozzle (20) internal thread is M14 × 1, and wall thickness is 2mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420586949.XU CN204200442U (en) | 2014-09-25 | 2014-09-25 | A kind of mesopore pressure accumulation is without static leakage oil sprayer |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420586949.XU CN204200442U (en) | 2014-09-25 | 2014-09-25 | A kind of mesopore pressure accumulation is without static leakage oil sprayer |
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| CN204200442U true CN204200442U (en) | 2015-03-11 |
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| CN201420586949.XU Withdrawn - After Issue CN204200442U (en) | 2014-09-25 | 2014-09-25 | A kind of mesopore pressure accumulation is without static leakage oil sprayer |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104989571A (en) * | 2015-07-10 | 2015-10-21 | 中国重汽集团重庆燃油喷射系统有限公司 | Split type control valve and oil atomizer |
| CN106762307A (en) * | 2016-11-24 | 2017-05-31 | 北京亚新科天纬油泵油嘴股份有限公司 | The control valve arrangement and electric-controlled fuel injector of a kind of electric-controlled fuel injector |
| CN107514328A (en) * | 2017-09-27 | 2017-12-26 | 重庆红江机械有限责任公司 | A kind of micro- spray electric-controlled fuel injector for dual fuel engine |
| CN109139319A (en) * | 2018-09-27 | 2019-01-04 | 中国重汽集团重庆燃油喷射系统有限公司 | A kind of common-rail injector |
| CN111120171A (en) * | 2019-12-06 | 2020-05-08 | 一汽解放汽车有限公司 | Fuel injection valve assembly |
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2014
- 2014-09-25 CN CN201420586949.XU patent/CN204200442U/en not_active Withdrawn - After Issue
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104989571A (en) * | 2015-07-10 | 2015-10-21 | 中国重汽集团重庆燃油喷射系统有限公司 | Split type control valve and oil atomizer |
| CN106762307A (en) * | 2016-11-24 | 2017-05-31 | 北京亚新科天纬油泵油嘴股份有限公司 | The control valve arrangement and electric-controlled fuel injector of a kind of electric-controlled fuel injector |
| CN107514328A (en) * | 2017-09-27 | 2017-12-26 | 重庆红江机械有限责任公司 | A kind of micro- spray electric-controlled fuel injector for dual fuel engine |
| CN107514328B (en) * | 2017-09-27 | 2023-12-08 | 重庆红江机械有限责任公司 | Micro-injection electric control fuel injector for dual-fuel engine |
| CN109139319A (en) * | 2018-09-27 | 2019-01-04 | 中国重汽集团重庆燃油喷射系统有限公司 | A kind of common-rail injector |
| CN109139319B (en) * | 2018-09-27 | 2023-09-29 | 重油高科电控燃油喷射系统(重庆)有限公司 | Common rail fuel injector |
| CN111120171A (en) * | 2019-12-06 | 2020-05-08 | 一汽解放汽车有限公司 | Fuel injection valve assembly |
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