CN2906109Y

CN2906109Y - Multi-squirt-hole pencil type oil injector

Info

Publication number: CN2906109Y
Application number: CN 200620103321
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 and a long and thin pencil-shape structure, and is welded to a tube union and a protecting cap screw. The tube union is provided with a needle valve and a nozzle and the needle valve has a long and thin structure; a shield ring, in which an O-shape joint ring is embedded, is covered on one end of the oil tube; a nut is covered on the back end of the convex step of the shield ring; 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; an anti-carbon circle is embedded in the cirumferential groove in the front end of the oil sprayer body; the nut at the end of the pressure-regulating screw is covered with the lift adjusting screw; the O-shape joint ring that covering the back end of the protecting cap screw has a hexagonal protecting cap. 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 that connects multiple inlet connector.

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, the multi-orifice pencil-style fuel injectors that connects multiple inlet connector 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 the penholder type structure of inner chamber with pipe joint, helmet screw mutually, pipe joint is equipped with oil pipe, oil injector body is fitted with needle-valve and nozzle, and needle-valve is elongated rod shaped structure; Take technical measures to comprise: the other end of oil pipe is set with the oil pipe back-up ring, and oil pipe back-up ring embedding hoop has the O RunddichtringO, and spiro cap is contained on the convex step of oil pipe back-up ring rear end;

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; Oil injector body front end peripheral groove inner-embedded cover is equipped with anti-carbon ring;

Be positioned at the nut suit lift adjusting screw of pressure regulating screw rear end, the O RunddichtringO sealing that helmet screw rear end is with is covered with the hexagonal helmet.

For optimizing 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 138mm ± 2mm; The needle valve structure size diameter is 3.5mm～3.6mm, and long is 116mm～117mm.

For circulation area in making obtains maximum value, augmented flow, needle-valve seat surface diameter is 2.0mm～2.1mm, needle lift is 0.48mm ± 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 0.33mm～0.34mm, and the injection cone angle that constitutes between spray orifice in the plane is 148 ° ± 3 °; Angle is 74 ° ± 2 ° between nozzle spray orifice medial axis and nozzle medial axis.

For reaching the atomizing effect of better fuel oil, nozzle spray orifice aperture is 0.33mm.Oil injector body front end periphery also is inserted in packing ring.

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, 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, good reliability and long service life characteristics.

Description of drawings

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

Fig. 2 is a spray orifice distribution schematic diagram among Fig. 1;

Fig. 3 is an oil nozzle enlarged diagram 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 1～3.

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 the penholder type structure of inner chamber with pipe joint 10, helmet screw 2 mutually, pipe joint 10 equipped oil pipes 18, oil injector body 13 is fitted with needle-valve 14 and nozzle 16, and needle-valve 14 is elongated rod shaped structure; 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 138mm ± 2mm; Needle-valve 14 physical dimension diameters are 3.5mm～3.6mm, and long is 116mm～117mm.Needle-valve 14 seat surface diameters are 2.0mm～2.1mm, for effectively controlling delayed injection endurance and fuel injection quantity, reduce the impact force of working procedure, and needle-valve 14 lifts are 0.48mm ± 0.03mm.Oil injector body 13 front end peripheries also are inserted in packing ring 12.

The other end of oil pipe 18 is set with oil pipe back-up ring 20, and oil pipe back-up ring 20 embedding hoops have O RunddichtringO 172, and nut 19 is sleeved on the oil pipe back-up ring 20 rear end convex steps;

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; Oil injector body 13 front end peripheral groove inner-embedded covers are equipped with anti-carbon ring 15;

Be positioned at the nut 3 suit lift adjusting screw 7 of pressure regulating screw 5 rear ends, O RunddichtringO 171 sealings that helmet screw 2 rear ends are with are covered with hexagonal helmet 1.

Nozzle 16 is many spray orifices minor diameter structure, shown in Fig. 2,3, nozzle 16 peripheries all radian are shaped on 4 spray orifice 16a, for more effectively guaranteeing the atomization quality of fuel oil, be beneficial to burning, reduce oil consumption, reduce the discharging of CO and HC, spray orifice 16a aperture is 0.33mm～0.34mm, and the injection cone angle that constitutes between spray orifice in the plane is 148 ° ± 3 °; Angle is 74 ° ± 2 ° between nozzle 16 spray orifice 16a medial axis and nozzle 16 medial axis.Nozzle 16 spray orifice 16a apertures are that 0.33mm is good.

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, comprise the oil injector body (13) that welds and have the penholder type structure of inner chamber with pipe joint (10), helmet screw (2) mutually, pipe joint (10) is equipped with oil pipe (18), oil injector body (13) is fitted with needle-valve (14) and nozzle (16), and needle-valve (14) is elongated rod shaped structure;

It is characterized in that: the other end of described oil pipe (18) is set with oil pipe back-up ring (20), and oil pipe back-up ring (20) embedding hoop has O RunddichtringO (172), and nut (19) is sleeved on the convex step of oil pipe back-up ring (20) rear end;

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); Described oil injector body (13) front end peripheral groove inner-embedded cover is equipped with anti-carbon ring (15);

Be positioned at nut (3) the described lift adjusting screw of suit (7) of described pressure regulating screw (5) rear end, O RunddichtringO (171) sealing that described helmet screw (2) rear end is with is covered with hexagonal helmet (1).

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 138mm ± 2mm; Needle-valve (14) physical dimension diameter is 3.5mm～3.6mm, and long is 116mm～117mm.

3, a kind of multi-orifice pencil-style fuel injectors according to claim 2 is characterized in that: described needle-valve (14) seat surface diameter is 2.0mm～2.1mm, and needle-valve (14) lift is 0.48mm ± 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 0.33mm～0.34mm, and the injection cone angle that constitutes between spray orifice in the plane is 148 ° ± 3 °; Angle is 74 ° ± 2 ° between described nozzle (16) spray orifice (16a) medial axis and nozzle (16) medial axis.

5, the multi-orifice pencil-style fuel injectors that connects multiple inlet connector according to claim 4 is characterized in that: described oil injector body (13) front end periphery also is inserted in packing ring (12).

6, the multi-orifice pencil-style fuel injectors that connects multiple inlet connector according to claim 5 is characterized in that: described nozzle (16) spray orifice (16a) aperture is 0.33mm.