CN2893193Y

CN2893193Y - Long bend pipe joint multi-hole type fuel injection device

Info

Publication number: CN2893193Y
Application number: CN 200520014330
Authority: CN
Inventors: 周书田
Original assignee: Individual
Current assignee: Individual
Priority date: 2005-08-25
Filing date: 2005-08-25
Publication date: 2007-04-25
Anticipated expiration: 2015-08-25

Abstract

The utility model discloses an oil injector with long bending pipes and multi-hole joints, comprising an oil injector having an inner cavity and welded with the joint of an inlet oil pipe, pressed with the inlet oil long bending pipe with a filtering core, a needle valve and nozzles; the oil injector is of the thin penholder structure, the needle valve matching with the inner cavity of the oil injector is a thin and bacilliform structure, and the nozzle is imbedded in the front cavity of the oil injector; the guidance sleeve in the exposed wall of the rear cavity of the oil injector is provided with a spring base, pressure-adjusting spring, and the ascending adjusting bolt with a spacer in order, the press-adjusting bolt of the ascending adjustable bolt is connected with the spacer and pressure-adjusting bolt casing is provided with a screw cap; the nut set in the rear end of the adjusting bolt is provided with the ascending adjusting bolt; the carbon-prevention circle is arranged in the external groove of the oil injector. The utility model possesses advantages of novel structure, small cubage, good performance, less oil consumption, less discharging, high reliability, and long service life.

Description

Long Bent Pipe Jiont Porous Injector

Technical field

The utility model relates to oil sprayer, specifically relates to Long Bent Pipe Jiont Porous Injector.

Background technique

Multi-hole nozzle is the accurate device on the motor, and quality of fit is higher, and the quality of nozzle quality 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 nozzle seat surface, causes fault to increase, and reliability reduces; The 2nd, the nozzle nozzle hole number 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 Long Bent Pipe Jiont Porous Injector of easy for installation, long service life.

The utility model solves the problems of the technologies described above the technological scheme that is adopted:

Long Bent Pipe Jiont Porous Injector comprises the oil injector body that welds and have inner chamber with inlet connector mutually, is pressed with the long bend pipe of oil-feed of filter core, needle-valve, and the long bend pipe head of nozzle oil-feed is socketed with the pipe joint nut; The technical measures of taking comprise:

Described 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 described 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 described oil injector body back cavity convex wall is equipped with spring seat, pressure adjusting spring in order and is set with pad, the described pad of pressure regulating screw butt of the described lift adjusting screw of suit, described pressure regulating screw is set with nut; Be positioned at the described lift adjusting screw of nut suit of described pressure regulating screw rear end;

Described oil injector body front end peripheral groove inner-embedded cover is equipped with anti-carbon ring.

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, above-mentioned oil injector body physical dimension diameter is 9.5mm ± 0.25mm, longly is 116.8mm ± 2mm; The needle valve structure size diameter is 3.5mm～3.6mm, and long is 93.5mm～97.5mm.

For circulation area in making obtains maximum value, augmented flow, the tilt angle is 22 ° between the common centreline of above-mentioned nozzle spray orifice and needle-valve axis; For effectively controlling delayed injection endurance and fuel injection quantity, reduce the impact force of working procedure; Described needle-valve seat surface diameter is 1.8mm～1.9mm, and needle lift is 0.4mm ± 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, above-mentioned nozzle periphery is shaped on 4 spray orifices, and the spray orifice aperture is 0.28mm～0.32mm, and the injection cone angle that constitutes between spray orifice in the plane is 154 ° ± 3 °; On the described nozzle between spray orifice medial axis and nozzle medial axis angle be respectively 62.5 ° ± 2 ° in 62.5 ° ± 2 °, No. 4 holes, 93.5 ° ± 2 °, No. 3 holes, 93.5 ° ± 2 °, No. 2 holes, No. 1 hole in proper order.

For more equipped, above-mentioned oil injector body front end periphery also is inserted in packing ring.

For reaching the atomizing effect of better fuel oil, above-mentioned nozzle injection diameter is 0.3mm.

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 injector body adopts the minor diameter structure, is convenient to oil sprayer like this and is installed in the optimum position, firing chamber, 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, 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 be among Fig. 1 F to the long bend pipe oral area of oil-feed position schematic representation;

Fig. 3 is a nozzle schematic representation among Fig. 1;

Fig. 4 is the oil spout mouth enlarged view and the spray orifice distribution schematic diagram of nozzle among Fig. 1;

Fig. 5 be among Fig. 4 in Z-Z axis normal projection plane angle schematic representation between spray orifice.

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; Fig. 2 is the long bend pipe oral area of an oil-feed position schematic representation among Fig. 1; Long Bent Pipe Jiont Porous Injector comprises the oil injector body 4 that welds and have inner chamber with inlet connector 15 mutually, can connect multiplely as inlet connectors such as bend pipe, inclined tubes, also can use the oil pipe of complex angles shape; Be pressed with the long bend pipe 16 of oil-feed of filter core 15, needle-valve 3, nozzle 1, the long bend pipe head of oil-feed is socketed with pipe joint nut 14; Oil injector body 4 is elongated penholder type 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 4 physical dimension diameters are 9.5mm ± 0.25mm, and long is 116.8mm ± 2mm; Needle-valve 3 physical dimension diameters are 3.5mm～3.6mm, and long is 93.5mm～97.5mm; The needle-valve 3 that is complementary with these oil injector body 4 inner chambers is elongated rod shaped structure, for circulation area in making obtains maximum value, and augmented flow, the tilt angle is 22 ° between the common centreline of nozzle 1 spray orifice 1a and needle-valve 3 axis; For effectively controlling delayed injection endurance and fuel injection quantity, reduce the impact force of working procedure; Needle-valve 3 seat surface diameters are 1.8mm～1.9mm, and needle lift is 0.4mm ± 0.03mm; Nozzle 1 is inlaid in the front end chamber of oil injector body 4; 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 1 periphery is shaped on 4 spray orifice 1a, and spray orifice 1a aperture is 0.25mm～0.32mm, and preferable aperture is 0.28mm～0.32mm; For reaching the atomizing effect of better fuel oil, nozzle 1 spray orifice 1a diameter is 0.3mm; And the injection cone angle that constitutes between spray orifice in the plane is 154 ° ± 3 °; On the nozzle 1 between spray orifice 1a medial axis and nozzle 1 medial axis angle be respectively 62.5 ° ± 2 ° in 62.5 ° ± 2 °, No. 4 holes, 93.5 ° ± 2 °, No. 3 holes, 93.5 ° ± 2 °, No. 2 holes, No. 1 hole in proper order, shown in Fig. 3 to 5.

Be positioned at the lift adjusting screw 9 that guide pin bushing 6 rear ends on the oil injector body 4 back cavity convex walls are equipped with spring seat 7, pressure adjusting spring 8 in order and are set with pad 10, the pressure regulating screw 11 butt pads 10 of suit lift adjusting screw 9, pressure regulating screw 11 is set with nut 12; Be positioned at the nut 13 suit lift adjusting screw 9 of pressure regulating screw 11 rear ends;

Oil injector body 4 front end peripheral groove inner-embedded covers are equipped with anti-carbon ring 2; For more equipped, oil injector body 4 front end peripheries also are inserted in packing ring 5.

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 technical measures that the processing of the utility model assembly critical piece should be taked:

1. should improve the accuracy to shape of inlet connector 15 conical surfaces, surface roughness, sealing, reliability when guaranteeing assembly installation use;

2. nozzle 1 spray orifice 1a is carried out numerical control machine tool processing; Divide spray orifice three process disposable processing, promptly feel relieved, boring, reaming.Pore size and angular orientation have been guaranteed; Carry out crush and grind processing after the heat treatment again, the flow and the uniformity conformity thereof of raising and stabilized nozzle spray orifice; Improve the emission performance of diesel engine, reduce engine fuel consumption;

3. oil injector body 4 materials adopt superior alloy steel, and its advantage is that cutting ability is good, and the temper resistance height can simplified processing process, can guarantee quality of product again;

4. injector valve 3 adopts and rolls the chromium Bearing Steel, and its seat surface and seat surface sealed diameter people having a common goal working procedure processing make needle-valve seat surface and seat surface sealed diameter coaxality obtain fine assurance, and spraying sealing up-to-standard rate is played a role during to assembling; Processing is carried out grinding after adopting belt pulley to drive the needle-valve rotation to seat surface;

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 injector body adopts the minor diameter structure, is convenient to oil sprayer like this and is installed in the optimum position, firing chamber, 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, 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, Long Bent Pipe Jiont Porous Injector, comprise the oil injector body (4) that welds and have inner chamber with inlet connector (17) mutually, be pressed with the long bend pipe of oil-feed (16) of filter core (15), needle-valve (3), nozzle (1), the long bend pipe head of oil-feed is socketed with pipe joint nut (14); It is characterized in that:

Described oil injector body (4) is elongated penholder type structure, and the needle-valve (3) that is complementary with this oil injector body (4) inner chamber is elongated rod shaped structure, and described nozzle (1) is inlaid in the front end chamber of oil injector body (4);

Be positioned at the lift adjusting screw (9) that guide pin bushing (6) rear end on described oil injector body (4) the back cavity convex wall is equipped with spring seat (7), pressure adjusting spring (8) in order and is set with pad (10), the described pad of pressure regulating screw (11) butt (10) of the described lift adjusting screw of suit (9), described pressure regulating screw (11) is set with nut (12); Be positioned at nut (13) the described lift adjusting screw of suit (9) of described pressure regulating screw (11) rear end;

Described oil injector body (4) front end peripheral groove inner-embedded cover is equipped with anti-carbon ring (2).

2, Long Bent Pipe Jiont Porous Injector according to claim 1 is characterized in that: described oil injector body (4) physical dimension diameter is 9.5mm ± 0.25mm, and long is 116.8mm ± 2mm; Needle-valve (3) physical dimension diameter is 3.5mm～3.6mm, and long is 93.5mm～97.5mm.

3, Long Bent Pipe Jiont Porous Injector according to claim 1 is characterized in that: the tilt angle is 22 ° between the common centreline of described nozzle (1) spray orifice (1a) and needle-valve (3) axis; Described needle-valve (3) seat surface diameter is 1.8mm～1.9mm, and needle-valve (3) lift is 0.4mm ± 0.03mm.

4, Long Bent Pipe Jiont Porous Injector according to claim 2 is characterized in that: the tilt angle is 22 ° between the common centreline of described nozzle (1) spray orifice (1a) and needle-valve (3) axis; Described needle-valve (3) seat surface diameter is 1.8mm～1.9mm, and needle-valve (3) lift is 0.4mm ± 0.03mm.

5, according to the described Long Bent Pipe Jiont Porous Injector of the arbitrary claim of claim 1 to 4, it is characterized in that: described nozzle (1) periphery is shaped on 4 spray orifices (1a), the spray orifice aperture is 0.28mm～0.32mm, and the injection cone angle that constitutes between spray orifice in the plane is 154 ° ± 3 °; Angle is respectively 62.5 ° ± 2 ° in 62.5 ° ± 2 °, No. 4 holes, 93.5 ° ± 2 °, No. 3 holes, 93.5 ° ± 2 °, No. 2 holes, No. 1 hole in proper order between last spray orifice (1a) medial axis of nozzle (1) and nozzle (1) medial axis.

6, Long Bent Pipe Jiont Porous Injector according to claim 5 is characterized in that: described oil injector body (4) front end periphery also is inserted in packing ring (5).

7, Long Bent Pipe Jiont Porous Injector according to claim 5 is characterized in that: described nozzle (1) spray orifice (1a) diameter is 0.3mm.