CN2066503U

CN2066503U - Star shape oil-injection pumps

Info

Publication number: CN2066503U
Application number: CN 90203612
Authority: CN
Inventors: 李玉涛
Original assignee: Individual
Current assignee: Individual
Priority date: 1990-03-24
Filing date: 1990-03-24
Publication date: 1990-11-28

Abstract

The utility model relates to a star shape oil-injection pumps used for diesel engines. The utility model is formed by that a circumferential direction gear which is on the upper portion of an oil quantity control valve on a high pressure pump which is connected with an oil transferring pump meshes gear racks of an adjusting rod which is provided with an accelerating draw rod and a fire extinguishing draw rod brake mechanism, and the other end of the connecting rod which is connected with the adjusting rod is connected with a set of flying block structure which is arranged on a driving disk. A fueling flow proportioner is arranged between the driving disk and a rotor distributing rotary plate, lugs on the other surface of the rotor distributing rotary plate contact with plungers and tappets which are circumferential direction equispaced on the high-pressure pump, and the rotor distributing shaft is provided with a fuel distributing hole which can be used for connecting the oil quantity control valve and a plunger cavity. The utility model has the advantages of simple structure, small size, and reliable performance.

Description

Star shape oil-injection pumps

The utility model relates to a kind of Injection Pump, especially for the Injection Pump on the diesel engine.

The plunger pump of most diesel oil machine use at present is made up of critical pieces such as the pump housing, cam and axle, turning rolls parts, plunger coupled parts, delivery valve matching parts, oil amount regulating mechanisms.Its deficiency is that volume is big, weight is big, for multicylinder engine owing to be that a plurality of pumps are formed thereby need on a long camshaft, process the cam number identical, because the complicated unanimity that is difficult to guarantee characteristic of fuel delivery, fuel feeding evenness, fuel supply advance angle between each cylinder of this processing technology with the oil cylinder number.

In view of above-mentioned deficiency the purpose of this utility model of the prior art be to provide a kind of can make that each oil supply cylinder characteristic, fuel feeding evenness, fuel supply advance angle reach unanimity and simple in structure, volume is little, lightweight Injection Pump.

The purpose of this utility model can realize by following measure: a kind of star Injection Pump that is used on the diesel engine, it is characterized in that: through hole one end parallel with center hole on the high pressure pump head links to each other with oil transfer pump, the other end is connected with the bottom of quantity control valve valve pocket, should with the perpendicular cylindrical valve pocket of high pressure pump head center line in be provided with the plunger that the bottom is the inclined-plane breach, the circumferential gear on its top can be meshed with the tooth bar of tangent direction setting, the adjustable lever one end that is provided with this tooth bar is provided with places restrictions on nut at a high speed and low speed is placed restrictions on nut, be provided with an end on the folded spring section corresponding shell of bulge loop on its opposite side and loose collar successively and can and quicken pull bar with an above-mentioned contacted flame-out pull bar of ring, and the end of this side adjustable lever links to each other with connecting rod one end that fulcrum is fixed on the housing, this connecting rod the other end can be enclosed within the drive plate axle on contact with the guiding valve that piece is complementary that flies that fulcrum is located on the drive plate again, an out of line minor axis is respectively established in the both sides that two head and the tail are connected with flyball bow one end of spring, lay respectively on two axis holes of drive plate symmetry and the distribution rotor rotating disk in the more above-mentioned axis hole in axle center two slotted eyes far away, this distribution rotor rotating disk opposite side is provided with projection, it can have the tappet that the injection plunger of inclined-plane breach joins to contact with the high pressure pump head was with spring last week on the uniform plunger cavity inner cylinder that is connected with oil sprayer front end, the distribution rotor axle that is positioned at high pressure pump head center hole is provided with the annular groove that can be connected with quantity control valve, and the fuel distribution hole on it can be connected with plunger cavity.With the cylinder of the contacted injection plunger tail end of spherical tappet on be provided with radially protruding key, the adjustable lever of the annular control sleeve that inner ring surface is complementary with it stretches out outside the pump housing.

The utility model mainly is made up of high pressure pump head, speed regulating mechanism and power mechanism.Wherein mainly be provided with quantity control valve on the high pressure pump head.High, low speed is placed restrictions on nut, fuel feeding control sleeve, spherical tappet, injection plunger, speed regulating mechanism mainly includes: fuel-flow control bar, connecting rod, guiding valve, fly piece, flame-out pull bar, quicken pull bar, power mechanism mainly includes: distribution rotor, fuel supply advance angle regulator, drive plate.

Drawing is described as follows:

Fig. 1 is a schematic side view of the present utility model.

Fig. 2 is that Figure 1A-O-A cuts open schematic representation.

Fig. 3 is the B-B schematic representation of Fig. 2.

Fig. 4 is the schematic representation that the C-C of Fig. 2 shifts to an earlier date initial state.

Fig. 5 is the schematic representation that the C-C of Fig. 2 shifts to an earlier date done state.

The utility model is described in further detail to utilize the example shown in the accompanying drawing.

In the schematic representation of star Injection Pump illustrated in figures 1 and 2, high pressure pump head 1 is cylindrical substantially and was provided with the through hole in axle center.Another through hole parallel with above-mentioned through hole is positioned on the annular solid of high pressure pump head, and the one end can link to each other with oil transfer pump, and the other end is connected with the bottom of quantity control valve 2 valve pockets.The valve body of this fuel-flow control valve body is cylindrical, and the center line of its center line and high pressure pump head is perpendicular, and its bottom is positioned on the annular solid of high pressure pump head, and another part then is positioned on the evagination part of annular solid.This valve pocket top covers 3, in be provided with the plunger 4 that a bottom is the inclined-plane breach.Be circumferentially with gear 5 on the top of plunger, but this gear can be meshed with the tooth bar 6 of tangent line direction setting.This tooth bar is located on the fuel-flow control bar 7, and an end of this bar is provided with and can places restrictions on nut 9 and low speed is placed restrictions on nut 10 by the high speed of outer cover 8 sealing, and they can make the fuel-flow control bar move within the specific limits, to guarantee the normal operation of motor.The other end of this fuel-flow control bar links to each other with an end of connecting rod.On the fuel-flow control bar, be provided with fixedly a bulge loop 11 and a loose collar 12, accompany spring 13 between them.The housing of the fuel injection pump corresponding with this part is provided with the fulcrum of two levers, and one of them is for quickening pull bar 14, and another is flame-out pull bar 15.One end of these two pull bars all can contact with a ring on the fuel-flow control bar, and the other end all is located at the outside of this housing of the fuel injection pump again.When moving flame-out pull bar and be positioned at the handle of housing outside, the prominent ring of its other end pushing drawing rod, make the tooth bar motion on the pull bar, with the gear rotation that is engaged with, inclined-plane breach of plunger then turns to and its side and the non-one side that communicates of following oil circuit below it, oil sprayer does not then have oil and supplies with the motor auto extinguishing.When stopping to move flame-out pull bar, it can recover original position under the effect of spring.When moving the handle that quickens pull bar, the fuel-flow control valve rod is opposite with above-mentioned moving direction, and its result increases fuel delivery.The motion of the fuel-flow control bar of this Injection Pump is except that being regulated by above-mentioned flame-out pull bar and acceleration pull bar, and it can be regulated automatically by flying block structure.The fulcrum that flies piece 16 is fixed on the drive plate 17, and 18 in the guiding valve that is complementary with it is enclosed within on the axle of drive plate, and an end in contact of the connecting rod 19 that this guiding valve can link to each other with the fuel-flow control bar with the other end is in the middle part of this connecting rod fulcrum is located at and be fixed on the housing.When the rotating speed of drive plate was fast, thereon the piece that flies of position then magnified angle, and the bottom upwarps, and promoted the connecting rod motion by guiding valve, and its effect then can turn round engine retard less to the oil sprayer fuel feeding with to move flame-out pull bar identical.Naturally reduce when the drive plate rotating speed hour flies the open angle of piece, under the spring action on the fuel-flow control bar, fly piece trend position of rest, the effect of this moment is with to move the acceleration pull bar identical, but multi-directional injector fuel feeding then makes the motor accelerated service.

In the center hole of high pressure pump head, be provided with the rotating shaft section of distribution rotor 20, be provided with annular groove with the corresponding position of radial direction through hole, quantity control valve lower end on it, be provided with radial direction through hole at this bottom portion of groove, this through hole turns to behind center line, when center line extends to the corresponding position of radial direction through hole that is connected with the injection plunger chamber, turn to again and be that radial direction through hole, this path are fuel distribution hole 21.The one side relative with the high pressure pump head is provided with a projection that protrudes plane of rotor disc on the rotating disk of this distribution rotor vertical rotation axis setting, it can be corresponding with the high pressure pump head spherical tappet 22 of last week in uniform a plurality of plunger cavities, each tappet again can with cylinder on be with spring 23 an injection plunger 24 join.The plunger cavity at this injection plunger top is connected by a through hole with high pressure pump head one-way valve 25 outward.This one-way valve is connected with oil sprayer 26 again.When the rotating shaft of distribution rotor is rotated, when the fuel distribution hole forwards the relative position of the through hole that is connected with the injection plunger chamber to, fuel oil then flows in the plunger cavity, when epitrochanterian projection with then promote plunger after spherical tappet contacts and travel forward, in the oil sprayer that the fuel oil of its front end space storage advances with one-way valve links to each other, fuel emission also was through with when projection was left spherical tappet.Under action of reset spring, injection plunger promotes spherical tappet again and gets back to the home position.

In the B-B partial schematic diagram of star Injection Pump shown in Figure 3, for the fuel delivery that makes each injection plunger identical, with the cylinder of the contacted injection plunger tail end of spherical tappet on be provided with radially protruding key 27, plunger portion in this protruding key outside is arranged with the annular control sleeve 28 that an inner ring surface is complementary with it, and 29 of set adjustable levers stretch out outside the pump housing on this sleeve.When the adjustable lever of Spin Control sleeve, injection plunger is rotation thereupon then, and the inclined-plane breach of its front end and the position of oil inlet hole change, and can carry out the trace adjusting to fuel injection quantity.

In Fig. 2, Fig. 4 and Fig. 5, it is made of two automatic timing plumbs 30 to be provided with the fuel supply advance angle regulator between distribution rotor and the drive plate again, and this flyball is the bow of radius of curvature between distribution rotor axle and rotating disk.The both sides of this bar one end are respectively equipped with out of line minor axis, in the minor axis 31 of drive plate one side axis hole placed on it, minor axis 32 more above-mentioned minor axises towards the distribution rotor one side are far away from the axle center, it places in the groove of two set symmetries of distribution rotor rotating disk one side, and can move in groove.An end and another non-end of establishing minor axis that automatic timing flyball is established minor axis are provided with spring 33 between the two, make flyball in drive plate rotating speed hour automatic trend axle center.Flyball outwards opens under action of centrifugal force when rotating speed increases, the minor axis relative position of flyball both sides then changes, cause the drive plate at their places and the relative position between distribution rotor also to change, make the minor axis reach that is located on the distribution rotor dish, the projection of then ordering about the place distribution rotor contacts fuel feeding in advance in advance with the injection plunger tappet, guarantee that oil inflame is abundant.

The utility model has following advantage compared to existing technology: simple in structure, volume is little, in light weight, dependable performance. Particularly owing to only have the cylinder number of a cam control oil spout, engine all can make injection characteristics, fuel supply advance angle and the fuel feeding uniformity reach unanimity.

Claims

1, a kind of star Injection Pump that is used on the diesel engine, it is characterized in that: through hole one end parallel with center hole on the high pressure pump head 1 links to each other with oil transfer pump, the other end is connected with the bottom of quantity control valve 2 valve pockets, should with the perpendicular cylindrical valve pocket of high pressure pump head center line in be provided with the plunger 4 that the bottom is the inclined-plane breach, the circumferential gear 5 on its top can be meshed with the tooth bar 6 of tangent direction setting, the adjustable lever one end that is provided with this tooth bar is provided with places restrictions on nut 9 at a high speed and low speed is placed restrictions on nut 10, be provided with an end successively on the folded spring 13 part corresponding shell of bulge loop 11 on its opposite side and loose collar 12 and can and quicken pull bar 14 with the contacted flame-out pull bar 15 of an above-mentioned ring, and the end of this side adjustable lever links to each other with connecting rod 19 1 ends that fulcrum is fixed on the housing, this connecting rod the other end can be enclosed within drive plate axle 17 on contact with the guiding valve 18 that piece 16 is complementary that flies that fulcrum is located on the drive plate again, an out of line minor axis is respectively established in the both sides that two head and the tail are connected with flyball 30 bows one end of spring 33, lay respectively on two axis holes of drive plate symmetry and distribution rotor 20 rotating disks in the more above-mentioned axis hole in axle center two slotted eyes far away, this distribution rotor rotating disk opposite side is provided with projection, it can have the tappet 22 that the injection plunger 24 of inclined-plane breach joins to contact with the front end that is with high pressure pump head last week spring 23 on uniform and plunger cavity inner cylinder that oil sprayer 26 is connected, the distribution rotor axle that is positioned at high pressure pump head center hole is provided with the annular groove that can be connected with quantity control valve, and the fuel distribution hole 21 on it can be connected with plunger cavity.

2, star Injection Pump according to claim 1 is characterized in that: with the cylinder of the contacted injection plunger tail end of spherical tappet on be provided with radially protruding key 27, the adjustable lever 29 of the annular control sleeve that inner ring surface is complementary with it stretches out outside the pump housing.