CN2906110Y

CN2906110Y - Multi-squirt-hole pencil type oil injector

Info

Publication number: CN2906110Y
Application number: CN 200620103319
Authority: CN
Inventors: 周书田
Original assignee: Individual
Current assignee: Individual
Priority date: 2006-04-30
Filing date: 2006-04-30
Publication date: 2007-05-30
Anticipated expiration: 2016-04-30

Abstract

The utility model discloses a multi-orifice pencil-shape oil sprayer, comprising an oil sprayer body which has an inner chamber , an oil inlet joint pressed with an filter element, a needle valve and a nozzle, wherein, the sprayer body is welded to the oil inlet joint ; the oil sprayer body has a long and thin pencil-shape structure; the needle valve also has a long and thin structure and matches with the inner chamber of the oil sprayer;the nozzle is embedded in the front end of the inner chamber of the oil sprayer; a spring seat, a pressure-regulating spring and a lift adjusting screw covered with a pad, are arranged in sequence on the back end of the guild sleeve positioned on the convex wall inside the back chamber of the oil sprayer body; the pressure-regulating screw covered with the lift adjusting screw is connected with a pad; the pressure-regulating screw is covered with a nut; the nut positioned on the back end of the pressure-regulating screw covers the the lift adjusting screw; and anti-carbon circle is embedded in the circumferential groove in the front end of the oil sprayer body; a gasket is embedded outside of the front part of the oil sprayer body and a positioning plate covers the back end of the oil sprayer body. The utility model is characterized in small size, nice performance, low oil consumption, full atomization of oil injection and less discharge.

Description

A kind of multi-orifice pencil-style fuel injectors

Technical field

The utility model relates to oil sprayer, relates in particular to a kind of multi-orifice pencil-style fuel injectors.

Background technique

The porous type oil nozzle is the accurate device on the motor, and quality of fit is higher, and the quality of quality nozzle will directly influence normal use of motor and life-span.Existing porous type oil injector body structural design: the one, adopt short injector valve, the guiding position that makes needle-valve is near engine chamber, and needle-valve guiding position is subject to heat, the oil nozzle stuck phenomenon often occurs; Assembly has the more number of spare parts and the sealing surface of Assembly part, has reduced the sealing of assembly, and adopts higher cracking pressure, has increased the impact force of needle-valve to the oil nozzle seat surface, causes fault to increase, and reliability reduces; The 2nd, injection hole on injection nozzle quantity is few, and the aperture is big, so the atomizing of fuel oil is insufficient, is unfavorable for burning, increases oil consumption, increases the discharging of CO and HC, is difficult for reaching environment protection requirement.

The applying date is that " a kind of rotation needle-valve hole nozzle " (notification number is CN2413041Y) of the Chinese utility model patent ZL00206288.7 on March 22nd, 2000 just belongs to the oil sprayer of this class formation; It comprises plunger, plunger body, guide finger, rotary spool, valve body, oil pocket and spring, the tapering, lower end of valve body is provided with nozzle opening, spring is arranged on the plunger upper end, plunger body and valve body are located with locating stud, the convex body of plunger lower end is arranged in " bucket " shape structure of rotary spool upper end, is provided with oil duct in tapering, rotary spool lower end.It can't overcome the problems referred to above.

Summary of the invention

Technical problem to be solved in the utility model is at above-mentioned deficiency, provide that volume is little, oil consumption is low, discharging less, a kind of multi-orifice pencil-style fuel injectors of easy for installation, long service life.

The utility model solves the problems of the technologies described above the technological scheme that is adopted: a kind of multi-orifice pencil-style fuel injectors, comprise the oil injector body that welds and have inner chamber with inlet connector mutually, and be pressed with the inlet connector of filter core, needle-valve, nozzle; The technical measures of taking comprise: oil injector body is elongated penholder type structure, and the needle-valve that is complementary with this oil injector body inner chamber is elongated rod shaped structure, and nozzle is inlaid in the front end chamber of oil injector body; Be positioned at the lift adjusting screw that rear end of conducting sleeve on the oil injector body back cavity convex wall is equipped with spring seat, pressure adjusting spring in proper order and is set with pad, the pressure regulating screw butt pad of suit lift adjusting screw, pressure regulating screw is set with nut; Be positioned at the nut suit lift adjusting screw of pressure regulating screw rear end; Oil injector body front end peripheral groove inner-embedded cover is equipped with anti-carbon ring, and oil injector body front end periphery also is inserted in packing ring, rear portion and also is with positioning plate.

Be to optimize technique scheme, the measure of being taked also comprises: for the guide portion distance of positions that makes needle-valve from the engine chamber better position, improved the situation of being heated at needle-valve guiding position better, stopped the oil nozzle stuck phenomenon; Oil injector body physical dimension diameter is 9.5mm ± 0.25mm, and long is 151mm ± 2mm; The needle valve structure size diameter is 3.5mm～3.6mm, and long is 129mm～130mm.

For circulation area in making obtains maximum value, augmented flow, the tilt angle is 15 ° between the common centreline of nozzle spray orifice and needle-valve axis; Needle-valve seat surface diameter is 2.0mm～2.1mm, and needle lift is 0.45 ± 0.03mm.

For more effectively guaranteeing the atomization quality of fuel oil, be beneficial to burning, reduce oil consumption, reduce the discharging of CO and HC, the equal radian of nozzle periphery is shaped on 4 spray orifices, and the spray orifice aperture is 0.325mm～0.335mm, and the injection cone angle that constitutes between spray orifice in the plane is 150 ° ± 3 °; On the nozzle between spray orifice medial axis and nozzle medial axis angle be respectively 61.52 ° ± 2 ° in 2, No. 3 holes in proper order, 89.45 ° ± 2 ° in 1, No. 4 hole.

For reaching the atomizing effect of better fuel oil, nozzle spray orifice aperture is 0.33mm.

Compared with prior art, the utility model is that the oil injector body structural design adopts elongated penholder type by one, and adopts elongated injector valve, and the guiding position that makes needle-valve is away from engine chamber, improve the situation of being heated at needle-valve guiding position, stopped the oil nozzle stuck phenomenon; The 2nd, adopt no oil return apparatus, reduced the sealing surface of number of spare parts and Assembly part, improved the sealing of assembly, and needle-valve has lower cracking pressure, reduced the impact force of needle-valve to the oil nozzle seat surface, the fault-free reliability increases; The 3rd, oil nozzle adopts many spray orifices minor diameter structure, and the atomization quality of fuel oil is good like this, is beneficial to burning, reduces oil consumption, reduces the discharging of CO and HC, reaches environment protection requirement.It has novel structure, volume is little, performance good, oil consumption is low, oil atomizing is abundant, discharging less, the characteristics of good reliability and long service life.

Description of drawings

Fig. 1 is the utility model vertical profile structural representation;

Fig. 2 is that nozzle is looked up the direction schematic representation among Fig. 1;

Fig. 3 is the axial elevational schematic view of nozzle Z-Z among Fig. 1;

Fig. 4 is a nozzle enlarged diagram among Fig. 1;

Fig. 5 is the local sectional structure schematic representation that amplifies of nozzle among Fig. 1.

Embodiment

Embodiment describes in further detail the utility model below in conjunction with accompanying drawing.

Structure of the present utility model is seen shown in the accompanying drawing 1～5.Fig. 1 is the utility model vertical profile structural representation; As shown in Figure 1, a kind of multi-orifice pencil-style fuel injectors comprises the oil injector body 13 that welds and have inner chamber with inlet connector 2 mutually, is pressed with the inlet connector 2 of filter core 1, needle-valve 14, nozzle 16; It is characterized in that:

Oil injector body 13 is elongated penholder type structure, and the needle-valve 14 that is complementary with these oil injector body 13 inner chambers is elongated rod shaped structure, and nozzle 16 is inlaid in the front end chamber of oil injector body 13;

Be positioned at the lift adjusting screw 7 that guide pin bushing 11 rear ends on the oil injector body 13 back cavity convex walls are equipped with spring seat 9, pressure adjusting spring 8 in proper order and are set with pad 6, the pressure regulating screw 5 butt pads 6 of suit lift adjusting screw 7, pressure regulating screw 5 is set with nut 4; Be positioned at the nut 3 suit lift adjusting screw 7 of pressure regulating screw 5 rear ends;

Oil injector body 13 front end peripheral groove inner-embedded covers are equipped with anti-carbon ring 15, and oil injector body 13 front end peripheries also are inserted in packing ring 12, rear portion and also are with positioning plate 10.

For the guide portion distance of positions that makes needle-valve from the engine chamber better position, improved the situation of being heated at needle-valve guiding position better, stopped the oil nozzle stuck phenomenon; Oil injector body 13 physical dimension diameters are 9.5mm ± 0.25mm, and long is 151mm ± 2mm; Needle-valve 14 physical dimension diameters are 3.5mm～3.6mm, and long is 129mm～130mm.

For circulation area in making obtains maximum value, augmented flow, the tilt angle is 15 ° between the common centreline of nozzle 16 spray orifice 16a and needle-valve 14 axis; Needle-valve 14 seat surface diameters are 2.0mm～2.1mm, and needle-valve 14 lifts are 0.45 ± 0.03mm.

For more effectively guaranteeing the atomization quality of fuel oil, be beneficial to burning, reduce oil consumption, reduce the discharging of CO and HC, nozzle 16 peripheries all radian are shaped on 4 spray orifice 16a, and spray orifice 16a aperture is 0.325mm～0.335mm, and the injection cone angle that constitutes between spray orifice in the plane is 150 ° ± 3 °; On the nozzle 16 between spray orifice 16a medial axis and nozzle 16 medial axis angle be respectively 61.52 ° ± 2 ° in 2, No. 3 holes in proper order, 89.45 ° ± 2 ° in 1, No. 4 hole.

For reaching the atomizing effect of better fuel oil, nozzle 16 spray orifice apertures are 0.33mm.

The utility model assembly working principle is as follows:

The utility model assembly is used for diesel engine with direct injection, during work the high pressure fuel of diesel injection pump with compression, enter oil sprayer fuel inlet fitting oil duct through high-pressure oil pipe and enter the oil injector body high-voltage oil cavity, the final needle-valve sealing cone position that arrives, when pressure surpasses needle opening pressure, needle-valve rises fuel oil and sprays from spray orifice, needle-valve is taken a seat when the pressure in the high-pressure oil passage is lower than needle opening pressure, end of injection, Injection Pump revolution moving one changes i.e. once high-pressure oil feed, and oil sprayer is promptly finished once with the fuel feeding of Injection Pump and sprayed.

The utility model is that the oil injector body structural design adopts elongated penholder type by one, and adopts elongated injector valve, and the situation of being heated at needle-valve guiding position has been improved away from engine chamber in the guiding position that makes needle-valve, has stopped the oil nozzle stuck phenomenon; The 2nd, oil nozzle adopts many spray orifices minor diameter structure, and the atomization quality of fuel oil is good like this, is beneficial to burning, reduces oil consumption, reduces the discharging of CO and HC, reaches environment protection requirement.It has novel structure, volume is little, performance good, oil consumption is low, oil atomizing is abundant, discharging less, the characteristics of good reliability and long service life.

Though the utility model illustrates and describes by the reference preferred embodiment,, those skilled in the art should understand, and in the scope of claims, can do the various variation on form and the details.

Claims

1, a kind of multi-orifice pencil-style fuel injectors comprises the oil injector body (13) that welds and have inner chamber with inlet connector (2) mutually, is pressed with the inlet connector (2) of filter core (1), needle-valve (14), nozzle (16); It is characterized in that:

Described oil injector body (13) is elongated penholder type structure, and the needle-valve (14) that is complementary with this oil injector body (13) inner chamber is elongated rod shaped structure, and described nozzle (16) is inlaid in the front end chamber of oil injector body (13);

Be positioned at the lift adjusting screw (7) that guide pin bushing (11) rear end on described oil injector body (13) the back cavity convex wall is equipped with spring seat (9), pressure adjusting spring (8) in proper order and is set with pad (6), the described pad of pressure regulating screw (5) butt (6) of the described lift adjusting screw of suit (7), described pressure regulating screw (5) is set with nut (4); Be positioned at nut (3) the described lift adjusting screw of suit (7) of described pressure regulating screw (5) rear end;

Described oil injector body (13) front end peripheral groove inner-embedded cover is equipped with anti-carbon ring (15); Described oil injector body (13) front end periphery also is inserted in packing ring (12), the rear portion also is with positioning plate (10).

2, a kind of multi-orifice pencil-style fuel injectors according to claim 1 is characterized in that: described oil injector body (13) physical dimension diameter is 9.5mm ± 0.25mm, and long is 151mm ± 2mm; Needle-valve (14) physical dimension diameter is 3.5mm～3.6mm, and long is 129mm～130mm.

3, a kind of multi-orifice pencil-style fuel injectors according to claim 2 is characterized in that: the tilt angle is 15 ° between the common centreline of described nozzle (16) spray orifice (16a) and needle-valve (14) axis; Described needle-valve (14) seat surface diameter is 2.0mm～2.1mm, and needle-valve (14) lift is 0.45 ± 0.03mm.

4, a kind of multi-orifice pencil-style fuel injectors according to claim 3, it is characterized in that: described nozzle (16) periphery all radian is shaped on 4 spray orifices (16a), spray orifice (16a) aperture is 0.325mm～0.335mm, and the injection cone angle that constitutes between spray orifice in the plane is 150 ° ± 3 °; Described nozzle (16) is gone up between spray orifice (16a) medial axis and nozzle (16) medial axis angle and is respectively 61.52 ° ± 2 ° in 2, No. 3 holes in proper order, 89.45 ° ± 2 ° in 1, No. 4 hole.

5, a kind of multi-orifice pencil-style fuel injectors according to claim 4 is characterized in that: described nozzle (16) spray orifice aperture is 0.33mm.