CN102720615A

CN102720615A - Cross jet hole fuel spray nozzle

Info

Publication number: CN102720615A
Application number: CN201210233527XA
Authority: CN
Inventors: 傅琳; 杨立发; 李蕾
Original assignee: 703th Research Institute of CSIC
Current assignee: 703th Research Institute of CSIC
Priority date: 2012-07-07
Filing date: 2012-07-07
Publication date: 2012-10-10

Abstract

The invention discloses a cross jet hole fuel spray nozzle, and is characterized in that at least three main jet holes are arranged on a nozzle valve; more than four even sub-jet holes are arranged on each main jet holes; the sub-jet holes are communicated with the main jet holes, and are crossed in the main jet holes at the same position; the sub-jet holes on each main jet hole are averagely divided into a left half group and a right half group; the left half group and the right half group are symmetrically distributed by using the central line of the main jet holes as a symmetry axis; the adjacent lengthened sections of the central line of the sub-jet holes in the left half group and the right half group between two adjacent main jet holes are crossed; the lengthened sections of the central line of the sub-jet holes of the left half group and the right half group corresponding to adjacent sub-jet holes arranged on both sides in sequence are intersected; the area of the cross section of the main jet hole is smaller than the sum of the areas of the cross sections of the sub-jet holes; fuel is sprayed out from the sub-jet holes at the crotch of the sub-jet holes after a stronger vortex is generated caused by the change of motion direction, and taper cylinder-shaped oil mist sprayed out from the sub-jet holes are respectively intersected to form stronger disturbance; the cross jet hole fuel spray nozzle strengthens the atomizing strength of fuel, and is beneficial to air-fuel mixture; and the combustion is more sufficient so that the fuel spray nozzle is suitable for popularization.

Description

Intersection spray orifice oil nozzle

Technical field

The present invention relates to a kind of in-cylinder direct injection fuel injection device for I. C. Engine, particularly a kind of intersection spray orifice oil nozzle is used to realize that the fuel oil disturbance is sprayed behind the eddy current.

Background technique

Along with progress of science and technology; The birth of internal-combustion engine has driven the flourish of society; Present internal-combustion engine recoverable amount enormous amount but also in swift and violent increase; When offering convenience to the mankind, also aggravated environmental pollution and energy shortage, the discharging and the raising fuel utilization ratio that therefore reduce internal-combustion engine seem particularly important.The fogging degree of fuel of internal combustion engine has bigger influence to the Economy of motor with discharging; The method that improves atomizing intensity mainly contains and improves jet pressure and organize two kinds of methods of fuel oil eddy current; The high-pressure common rail technology of diesel engine can make jet pressure to 2000bar at present; But the raising once more of fuel pressure receives the restriction of material and machining accuracy, and organizing the fuel oil eddy current is a kind of method with broad prospects for development, and this organizes the fuel oil eddy-current technique still to be in the stage early stage of development at present; Await technological innovation, improve the energy-saving and emission-reduction of atomizing intensity.

Summary of the invention

The present invention the invention provides a kind of intersection spray orifice oil nozzle in order to improve the atomizing intensity of injected fuel, through the sub-spray orifice of out of phase is set, can realize that multi-angle is sprayed behind the fuel oil eddy current.

The technological scheme that the present invention adopts is: a kind of intersection spray orifice oil nozzle; Comprise needle-valve and needle-valve body; It is characterized in that along its center line one all uniform array at least three main jet holes being arranged in the needle-valve body, corresponding each main jet hole is provided with four above even numbers spray orifice, sub-spray orifice and main jet hole UNICOM on needle-valve body; And same position bifurcated in the main jet hole; Sub-spray orifice on each main jet hole is equally divided into left half group and right half group, and left half group and right half group is that symmetry axis is symmetrically distributed with the main jet centerline hole, and half group on the left side between the adjacent two main jet holes is crossing with right half group of adjacent sub-orifice center line prolonged section; Crossing in twos with right half group sub-orifice center line prolonged section to half group on the left side that both sides are arranged in order correspondence by adjacent sub-spray orifice, main jet hole cross-section area is less than sub-spout cross-section area sum.

Center line on two sub-spray orifices that the center line prolonged section intersects between the said adjacent two main jet holes and adjacent sub-orifice center line are not at grade.

Left half group and right sub-spray orifice in half group are that the center is divergent shape and arranges with bifurcation site in the main jet hole on said each main jet hole.

Be provided with the sub-spray orifice that does not intersect with other sub-orifice center line extensions the center line extension on said each main jet hole between left half group and right half group.

Sub-spray orifice bifurcation site is provided with the vortex space in the said main jet hole, and cross section, vortex space is greater than sub-spray orifice cross section sum, a side and main jet hole UNICOM, opposite side and sub-spray orifice UNICOM.

The present invention is provided with the plurality of sub spray orifice at the main jet bore end; Fuel oil produces than sprayed by sub-spray orifice behind the eddy current by force in the change of sub-spray orifice crotch owing to moving direction; Strengthen fuel-oil atmozation intensity, the awl tubular mist of oil of sub-spray orifice ejection crosses respectively in twos, forms stronger disturbance; Further strengthen the atomizing intensity of fuel oil, help oil gas and mix; This is simple in structure, and is easy to implement, and atomizing intensity is higher, and it is more even that oil gas mixes, and it is more abundant to burn, and helps energy-saving and emission-reduction, and economic benefit and social benefit are obvious, and the market space is huge to be suitable for large scale application.

Description of drawings

Fig. 1 is for looking the visible perspective structure schematic representation of hidden line on the embodiment of the invention;

Fig. 2 is the visible perspective structure schematic representation of embodiment of the invention side-looking hidden line.

Label title among the figure: 1 needle-valve; 2 needle-valve bodies; 3 main jet holes; 4 sub-spray orifices.

Embodiment

The embodiment of the invention such as Fig. 1, shown in Figure 2; This intersection spray orifice oil nozzle comprises needle-valve 1 and needle-valve body 2, it is characterized in that along its center line one all uniform array at least five main jet holes 3 being arranged in the needle-valve body 2; Corresponding each main jet hole 3 is provided with four sub-spray orifices 4 on needle-valve body 2; Sub-spray orifice 4 and main jet hole 3 UNICOMs, and in main jet hole 3 the same position bifurcated, the sub-spray orifice on each main jet hole 3 is equally divided into left half group and right half group for 4 two one group; Left half group and right half group is that symmetry axis is symmetrically distributed with main jet hole 3 center lines; Half group on a left side and right sub-spray orifice 4 in half group are that the center is divergent shape and arranges with bifurcation site main jet hole 3 in, and adjacent sub-spray orifice 4 center line prolonged sections intersect in half group on a left side between the adjacent two main jet holes 3 and right half group, and half group on the left side of adjacent sub-spray orifice 4 both sides is crossing with right half group of interior sub-spray orifice 4 center line prolonged section; Main jet hole 3 cross-section areas are less than sub-spout cross-section area sum, and fuel oil flow velocity in main jet hole 3 is higher than flow velocity in the sub-spout 4; During work, by sub-spout 4 ejections, fuel oil changes at crotch change direction flow velocity and produces stronger eddy current high pressure fuel after main jet hole 3 arrives sub-spray orifice 4 bifurcation site at a high speed, and the fuel-oil atmozation intensity after the ejection is bigger; Half group two the sub-spray orifices 4 in the left side that adjacent main jet hole is 3 cross respectively with the awl tubular mist of oil of right half group two sub-spray orifice 4 ejections in twos, form stronger disturbance, thereby further strengthen the atomizing intensity of fuel oil, help oil gas and mix; This is simple in structure, and is easy to implement, and atomizing intensity is higher, and it is more even that oil gas mixes, and it is more abundant to burn, and helps energy-saving and emission-reduction, and economic benefit and social benefit are obvious, and the market space is huge to be suitable for large scale application.

Can also in the main jet hole, the vortex space be set sub-spray orifice bifurcation site when the present invention implements, cross section, vortex space is greater than sub-spray orifice cross section sum, a side and main jet hole UNICOM, and opposite side and sub-spray orifice UNICOM are used to add maelstrom and atomizing intensity; Can also half group two the sub-orifice center lines in a left side be separately positioned on two planes that certain angle arranged, right half group with its symmetry, be used to enlarge jet space; The sub-spray orifice that does not intersect with other sub-orifice center line extensions the center line extension can also be set between half group and right half group on a left side, be used to enlarge jet space.

Claims

1. one kind intersects the spray orifice oil nozzle; Comprise needle-valve (1) and needle-valve body (2); It is characterized in that along its center line one all uniform array at least three main jet holes (3) being arranged in the needle-valve body (2); Corresponding each main jet hole (3) is provided with four above even numbers spray orifice (4) on needle-valve body (2); Sub-spray orifice (4) and main jet hole (3) UNICOM, and in main jet hole (3) the same position bifurcated, the sub-spray orifice (4) on each main jet hole (3) is equally divided into left half group and right half group; Left half group and right half group is that symmetry axis is symmetrically distributed with main jet hole (3) center line; Half group on a left side between the adjacent two main jet holes (3) is crossing with right half group of adjacent sub-spray orifice (4) center line prolonged section, and crossing in twos with right half group sub-spray orifice (4) center line prolonged section to half group on the left side that both sides are arranged in order correspondence by adjacent sub-spray orifice (4), main jet hole (3) cross-section area is less than sub-spout cross-section area sum.

2. intersection spray orifice oil nozzle according to claim 1, it is characterized in that on two sub-spray orifices (4) that center line prolonged section between the said adjacent two main jet holes (3) intersects center line and adjacent sub-spray orifice (4) center line not at grade.

3. intersection spray orifice oil nozzle according to claim 1 is characterized in that the sub-spray orifice (4) that go up in left half group and right half group in said each main jet hole (3) is that the center is divergent shape and arranges with bifurcation site in main jet hole (3).

4. intersection spray orifice oil nozzle according to claim 1 is characterized in that said each main jet hole (3) is provided with the sub-spray orifice that does not intersect with other sub-spray orifice (4) center line extensions the center line extension between going up left half group and right half group.

5. according to the arbitrary described intersection spray orifice oil nozzle of claim 1 to 4; It is characterized in that sub-spray orifice (4) bifurcation site is provided with the vortex space in the said main jet hole (3); Cross section, vortex space is greater than sub-spray orifice (4) cross section sum; One side and main jet hole (3) UNICOM, opposite side and sub-spray orifice (4) UNICOM.