CN206972414U - Pump, rail integrated form co-rail fuel feed pump - Google Patents
Pump, rail integrated form co-rail fuel feed pump Download PDFInfo
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- CN206972414U CN206972414U CN201720781193.8U CN201720781193U CN206972414U CN 206972414 U CN206972414 U CN 206972414U CN 201720781193 U CN201720781193 U CN 201720781193U CN 206972414 U CN206972414 U CN 206972414U
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Abstract
A kind of pump, rail integrated form co-rail fuel feed pump disclosed in the utility model, camshaft, rotor block, plunger pump, voltage stabilizing valve member, oil-feed screw including the oil feed pump pump housing and in oil feed pump, electromagnetic valve components and fuel-displaced valve member are installed on the pump housing of plunger pump, it also includes oil transfer pump and is provided with accumulator on the oil feed pump pump housing, oil transfer pump is worked by camshaft actuated, fuel inlet fitting in accumulator is provided with delivery connection by high-pressure oil pipe and delivery valve members on accumulator；Cam axle, on the one hand the plunger upward and downward in plunger pump is driven to form hydraulic oil by rotor block, on the other hand oil transportation pump work is driven, fuel chamber fuel feeding into plunger pump, the high pressure fuel that plunger pump is formed, which is entered by fuel-displaced valve member, high-pressure oil pipe, fuel inlet fitting in the cavity volume of accumulator, carries out pressure accumulation, and the high pressure fuel in the cavity volume of accumulator after pressure accumulation is distributed to each fuel injector by the delivery connection in the accumulator, hydraulic oil distribution pipe.
Description
Technical field
Fuel Injection Mechanism of Diesel Engine pump technical field is the utility model is related to, it is more particularly to a kind of to be applied to 37KW and following small-power
Light diesel engine, state four, the pump of the emission request of state five, rail integrated form co-rail fuel feed pump can be met.
Background technology
With diesel engine state three, state four, state five or the more propulsion of maximum discharge standard, high pressure common rail fuel injection system
Have become the mainstream technology of diesel fuel system.And the high pressure common rail fuel injection system of main flow is by co-rail fuel feed pump, height
Press oil the composition such as rail, common-rail injector, ECU and sensor.Within the system, co-rail fuel feed pump overall volume is larger, cost compared with
Height, and co-rail fuel feed pump and high pressure oil rail are individually, are separately mounted on the different parts of diesel engine, and space-consuming is big.Especially
For medium and small-scale diesel engine, physical dimension is particularly important for it.
It is anxious meanwhile domestic medium and small-scale diesel engine in the market still largely uses traditional mechanical fuel system at present
It need to be upgraded, to meet state three and above emission request.
Therefore, in view of the shortcomings of the prior art, develop the low pump of a kind of reasonable in design, simple in construction, small volume, cost,
Rail integrated form co-rail fuel feed pump.
Utility model content
Technical problem to be solved in the utility model is to be not used to for existing high pressure common rail fuel injection system
The problem of medium and small-scale diesel engine and provide it is a kind of be applied to 37KW and following low power light diesel engine, state four, state can be met
Pump, the rail integrated form co-rail fuel feed pump of five emission requests.
Technical problem to be solved in the utility model can be achieved through the following technical solutions：
A kind of pump, rail integrated form co-rail fuel feed pump, including the oil feed pump pump housing and camshaft in the oil feed pump,
Rotor block, plunger pump, voltage stabilizing valve member, oil-feed screw, electromagnetic valve components are installed on the pump housing of the plunger pump and gone out
Fuel tap part a, it is characterised in that accumulator, the oil transportation are provided with also including an oil transfer pump and on the oil feed pump pump housing
Pump is worked by the camshaft actuated, and the fuel inlet fitting in the accumulator is connected by high-pressure oil pipe and the fuel-displaced valve member
It is logical, at least one delivery connection is provided with the accumulator；The cam axle, on the one hand pass through the rotor block
Drive the plunger upward and downward in the plunger pump to form hydraulic oil, oil transportation pump work is on the other hand driven, into plunger pump
Fuel chamber fuel feeding, the high pressure fuel that the plunger pump is formed are entered by the fuel-displaced valve member, high-pressure oil pipe, fuel inlet fitting
Carry out pressure accumulation in the cavity volume of the accumulator, the high pressure fuel in the cavity volume of the accumulator after pressure accumulation passes through described
Delivery connection, hydraulic oil distribution pipe in accumulator are distributed to each fuel injector.
In a preferred embodiment of the present utility model, the cavity volume of the accumulator is cross-shaped, described
Four delivery connections are provided with accumulator, cavity volume of each delivery connection with the accumulator connects.
In a preferred embodiment of the present utility model, volume≤10cm of the cavity volume of the accumulator3。
In a preferred embodiment of the present utility model, the oil transfer pump is vane-type fuel transfer pump.
Pressure sensor is installed on the accumulator, the detector of the pressure sensor gos deep into the accumulator
In cavity volume, to detect the pressure in the cavity volume of the accumulator.
In a preferred embodiment of the present utility model, the oil feed pump pump housing overall length L1 is 138mm.Cylinder centre line spacing L is
32mm, the diameter of plunger d in plunger pump are 6mm, and the cam lift H on camshaft is 9mm.
In a preferred embodiment of the present utility model, camshaft installation cavity, post are provided with the oil feed pump pump housing
Fill in pump installation cavity, pressure maintaining valve installation cavity, annular oil-feed tank, the first oil input channel, spill port, oil-feed screw mounting hole, oil transfer pump peace
It behave affectedly；The oil-feed screw mounting hole connects with the annular oil-feed tank, the oil transfer pump installation cavity and the annular oil-feed tank
Connection, the annular oil-feed tank connect with the first end of first oil input channel, the first end of the spill port and the voltage stabilizing
Valve installation cavity connects；The axis of the axis of the camshaft installation cavity and the plunger pump installation cavity is mutually perpendicular to, the voltage stabilizing
The axis of the axis of valve installation cavity and the plunger pump installation cavity is mutually perpendicular to；
The camshaft is arranged in the camshaft installation cavity by clutch shaft bearing, second bearing and bearing (ball) cover,
The clutch shaft bearing, second bearing are arranged in the camshaft installation cavity, and wherein clutch shaft bearing is in supporting cam wheel axle
End, second bearing are supported on the outer end of the camshaft, and the bearing (ball) cover is arranged on the oil feed pump pump housing by fastener
Go up and be pressed in the second bearing；The centre position of the camshaft is provided with a driving cam；
The rotor block is arranged between the camshaft installation cavity and plunger pump installation cavity, and the rotor block passes through
One lock-screw being spun on the oil feed pump pump housing carries out axially directed and circumferential restriction；It is provided with the rotor block
One roller contacted with driving cam driving；
Oil-feed screw in the oil-feed screw mounting hole, the oil-feed screw are connected by oil inlet pipe and fuel tank
It is logical；
The oil transfer pump is arranged in the oil transfer pump installation cavity, the oil-out of the oil transfer pump and the annular oil-feed tank
Connection, the oil inlet of the oil transfer pump are connected by the oil-feed screw mounting hole with the oil-feed screw；
The plunger pump is arranged in the plunger pump installation cavity, and the plunger pump includes plunges pump body, plunger, plunger bullet
Spring, an annular oil cavity is provided between the inner peripheral surface of the periphery of the plunges pump body and the plunger pump installation cavity, and in institute
State and a plunger installation cavity, oil back chamber, the first back oil road, fuel chamber, the second oil input channel, the second oil return are provided with plunger body
Road, magnetic valve installation cavity, control spool bore, block and clamp nut installation cavity, fuel-displaced valve member installation cavity；Wherein described plunger
Installation cavity, fuel chamber, fuel-displaced valve member installation cavity are located on same axis and are interconnected, and the fuel chamber is located at the plunger
Between the two, the fuel-displaced valve member installation cavity is located at the top of the fuel chamber for installation cavity, fuel-displaced valve member installation cavity；It is described
Magnetic valve installation cavity, control spool bore, block and clamp nut installation cavity be located on same axis and with the plunger installation cavity,
Axis where fuel chamber, fuel-displaced valve member installation cavity is mutually perpendicular to, the magnetic valve installation cavity, the control spool bore and institute
Block and clamp nut installation cavity are stated respectively positioned at the axle where the plunger installation cavity, fuel chamber, fuel-displaced valve member installation cavity
The both sides of line, the magnetic valve installation cavity is by controlling spool bore to be connected with the fuel chamber, block and the clamp nut peace
It behave affectedly and is connected with the fuel chamber；The oil back chamber is located on the side face of the plunger installation cavity and under the fuel chamber
Side；The annular oil cavity is connected with the second end of first oil input channel and connected with the first end of second oil input channel, institute
State the second end of the second oil input channel connect with the oil pocket of crossing in the magnetic valve installation cavity, the oil back chamber one side and described the
The first end connection of two back oil roads, on the other hand the first end with first back oil road connects, and the of first back oil road
Two ends connect with the annular oil cavity；The middle and upper part of the plunger is inserted the plunger by the bottom of the plunger installation cavity and installed
Intracavitary, the plunger spring are enclosed on the bottom of the plunger, wherein the upper end of the plunger spring and the bottom of the plunges pump body
Portion is contacted, and the lower end of the plunger spring is touched with the plunger spring seated connection, and the plunger spring cover for seat is under the plunger
On end, and contacted with the roller body in the rotor block；
The voltage stabilizing valve member is arranged in the pressure maintaining valve installation cavity, entrance in the voltage stabilizing valve member with described time
The first end of oilhole is connected, and the outlet in the voltage stabilizing valve member is connected by oil pipe with the fuel tank；
The electromagnetic valve components are arranged in the magnetic valve installation cavity, and the electromagnetic valve components include electromagnet, electromagnetism
The tight cap of valve, armature, control valve element, armature guide sleeve, valve seat, magnetic valve spring and magnetic valve spring seat, it is described to control in valve element
Between a part be slidably mounted on it is described control spool bore in, the control valve in-core end has a valve element control terminal, the valve element control
End processed is extended into the fuel chamber, the outer end of the control valve element extend into the magnetic valve installation cavity and with the armature
Connection；The inner of the electromagnet is located in the magnetic valve installation cavity and is fixed on the plunges pump body by the tight cap of magnetic valve
On, the inner and armature of the electromagnet contacts and the armature is oriented into casing pressure shape in the magnetic valve installation cavity,
The armature is located in the armature guide sleeve and by the armature guide sleeve guiding movement；The magnetic valve spring passes through valve seat
With magnetic valve spring cover for seat on the outer end of the control valve element, the valve seat is fitted in described by the armature guide sleeve
In magnetic valve installation cavity, the valve seat carries out axial location by the bottom of chamber of the armature guide sleeve and the magnetic valve installation cavity
Limit；The magnetic valve spring seat moves together with the control valve element；The is provided with the control spool bore inner face
One conical seal (contact) face, the second conical seal (contact) face is provided with the outer face of the valve element control terminal of the control valve element；Described
When electromagnet is powered, the armature attracts to move out by the electromagnet, and the armature drives the control valve element outwards to transport
It is dynamic, first conical seal (contact) face is sealed with second conical seal (contact) face and coordinate, by the control spool bore and the combustion
Oil pocket seals off；In the electromagnet no power, the control valve element inwardly moves under magnetic valve spring driving, makes institute
State the first conical seal (contact) face to separate with second conical seal (contact) face, the control spool bore and fuel chamber sealing are led
It is logical；An annular is provided with the side face of the control valve element and crosses oil pocket, the annular crosses oil pocket and is located at the valve element control terminal
Outside and connected with the second end of second back oil road；The control valve in-core is provided with center oilhole, the center
The oil pocket of crossing that the both ends of oilhole are crossed in oil pocket, the magnetic valve installation cavity with the annular respectively connects；
The block and clamp nut are arranged in the block and clamp nut installation cavity, and the clamp nut screws in institute
State in block and clamp nut installation cavity and the block is pressed in block and the clamp nut installation cavity, the block
Inner face contacted with the inner face of valve element control terminal on the control valve element；
Fuel-displaced valve member is arranged in the fuel-displaced valve member installation cavity, and the fuel-displaced valve member includes fuel-displaced plug screw, gone out
Fuel tap spring, fuel-displaced valve core and ball, the fuel-displaced plug screw screw in the fuel-displaced valve member installation cavity and will be described fuel-displaced
Valve spring, fuel-displaced valve core and ball are fitted in the fuel-displaced valve member installation cavity, the upper end of the oil outlet valve spring and institute
Fuel-displaced plug screw connection is stated, the lower end of the oil outlet valve spring is connected with the fuel-displaced valve core；Installed in the fuel-displaced valve member
The bottom of chamber of chamber is provided with triconic sealing surface, and the ball is pressed on the triconic sealing surface by the fuel-displaced valve core
Sealing is formed, when fuel pressure below the ball is more than the elastic force of the oil outlet valve spring, fuel pressure is by the rolling
Pearl jacks up and the triconic sealing surface disengages and opens the fuel-displaced valve member；The lower end external diameter of the fuel-displaced valve core
Internal diameter less than the fuel-displaced valve member installation cavity forms an annular oil outlet chamber, and the external diameter of the ball is again smaller than the delivery valve
The internal diameter of part installation cavity；The fuel-displaced valve core interior edge axis direction is provided with one first and goes out oil hole, described first goes out
Oil hole runs through the fuel-displaced valve core up and down；Axis is provided with second in the fuel-displaced plug screw and goes out oil hole, described second
Go out fuel-displaced plug screw described in oil hole up/down perforation, the fuel-displaced plug screw passes through the fuel inlet fitting in high-pressure oil pipe and the accumulator
Connection.
In a preferred embodiment of the present utility model, the electromagnet uses cylindrical outer shape.
As a result of technical scheme as above, oil transfer pump and accumulator are installed in the oil feed pump pump housing by the utility model
On, realize pump, rail integrates.Oil transfer pump of the present utility model uses vane-type fuel transfer pump, and installing space is smaller, manufacturability
It is good, fuel feeding efficiency high.The utility model electromagnet uses cylindrical outer shape, is pressed on by the tight cap of magnetic valve on plunges pump body,
It is much smaller compared to former square electromagnet appearance and size, and manufacturability is more preferable.The utility model uses block and locking
Two kinds of part combination forms of nut, for controlling valve element adjusting pad block compared to monoblock type, manufacturability is more preferable.
Brief description of the drawings
Fig. 1 is the utility model pump, the schematic appearance of rail integrated form co-rail fuel feed pump.
Fig. 2 is Fig. 1 right view.
Fig. 3 is the utility model pump, the axial sectional view of rail integrated form co-rail fuel feed pump.
Fig. 4 is Fig. 1 A-A sectional views.
Fig. 5 is Fig. 1 B-B sectional views.
Embodiment
Referring to accompanying drawing, a kind of pump, rail integrated form co-rail fuel feed pump shown in figure, including the oil feed pump pump housing 100, oil feed pump
The overall length L1 of the pump housing 100 is 138mm.Cylinder centre line spacing L is 32mm.Camshaft installation cavity 110, plunger are provided with the oil feed pump pump housing 100
Pump installation cavity 120, pressure maintaining valve installation cavity 130, annular oil-feed tank A, the first oil input channel B, spill port E, oil-feed screw mounting hole
140th, oil transfer pump installation cavity 150；Oil-feed screw mounting hole 140 connects with annular oil-feed tank A, oil transfer pump installation cavity 150 and annular
Oil-feed tank A is connected, and annular oil-feed tank A connects with the first oil input channel B first end, and spill port E first end and pressure maintaining valve are installed
Chamber 130 connects；The axis of the axis of camshaft installation cavity 110 and plunger pump installation cavity 120 is mutually perpendicular to, pressure maintaining valve installation cavity
The axis of 130 axis and plunger pump installation cavity 120 is mutually perpendicular to.
Camshaft 200 is arranged in camshaft installation cavity 130 by bearing 210,220 and bearing (ball) cover 230, bearing
210th, 220 it is arranged in camshaft installation cavity 130, to the inner of supporting cam wheel axle 200, bearing 210 supports its middle (center) bearing 220
In the outer end of camshaft 200, bearing (ball) cover 230 is arranged on the oil feed pump pump housing 100 by fastener and seal and is pressed in axle
Hold on 210；A driving cam 240 is provided with the centre position of camshaft 200.The lift of driving cam 240 on camshaft 200
H is 9mm.
Rotor block 300 is arranged between camshaft installation cavity 110 and plunger pump installation cavity 120, and rotor block 300 is logical
Cross a lock-screw 310 being spun on the oil feed pump pump housing 100 and carry out axially directed and circumferential restriction；Set on rotor block 300
It is equipped with one and drives the roller 320 contacted with driving cam 240.
Oil-feed screw 400 is arranged in oil-feed screw mounting hole 140, and oil-feed screw 400 (is not shown by oil inlet pipe in figure
Go out) connected with fuel tank (not shown)；
Oil transfer pump 600 is arranged in oil transfer pump installation cavity 150, and the oil-out of oil transfer pump 500 connects with annular oil-feed tank A,
The oil inlet of oil transfer pump 500 is connected by oil-feed screw mounting hole 140 with oil-feed screw 400.Oil transfer pump 500 is vane type oil transportation
Pump, its installing space is smaller, good manufacturability, fuel feeding efficiency high.
Plunger pump 500 is arranged in plunger pump installation cavity 120.The plunger pump 500 include plunges pump body 510, plunger 520,
Plunger spring 530, an annular oil cavity is provided between the inner peripheral surface of the periphery of plunges pump body 510 and plunger pump installation cavity 120
C, and a plunger installation cavity 511, oil back chamber 512, the first back oil road 513, fuel chamber D, second are provided with plunger body 510
Oil input channel F, the second back oil road G, magnetic valve installation cavity 514, control spool bore 515, block and clamp nut installation cavity 516, go out
Fuel tap part installation cavity 517.
Plunger installation cavity 511, fuel chamber D, fuel-displaced valve member installation cavity 517 are located on same axis and are interconnected, combustion
Oil pocket D is located at plunger installation cavity 511, fuel-displaced valve member installation cavity 517 between the two.Plunger installation cavity 511 is located at fuel chamber D's
Top.
Magnetic valve installation cavity 514, control spool bore 515, block and clamp nut installation cavity 516 are located on same axis simultaneously
It is mutually perpendicular to the axis where plunger installation cavity 511, fuel chamber D, fuel-displaced valve member installation cavity 517, magnetic valve installation cavity
514th, spool bore 515 and block and clamp nut installation cavity 516 is controlled to be located at plunger installation cavity 511, fuel chamber D, fuel-displaced respectively
The both sides of axis where valve member installation cavity 517, magnetic valve installation cavity 514 is by controlling spool bore 515 and fuel chamber D to connect
Logical, block and clamp nut installation cavity 516 connect with fuel chamber D；Oil back chamber 512 is located on the side face of plunger installation cavity 511 simultaneously
Positioned at fuel chamber D lower section；Annular oil cavity C is connected with the first oil input channel B the second end and connected with the second oil input channel F first end
Logical, the second oil input channel F the second end connects with the mistake oil pocket 514a in magnetic valve installation cavity 514, the one side of oil back chamber 512 and the
Two back oil road G first end connection, on the other hand the first end with the first back oil road 513 connects, and the second of the first back oil road 513
End connects with annular oil cavity C.
The diameter d of plunger 520 in plunger pump 500 is 6mm.The middle and upper part of plunger 520 by plunger installation cavity 511 bottom
Insert in plunger installation cavity 511, plunger spring 530 is enclosed on the bottom of plunger 520, the wherein upper end of plunger spring 530 and plunger
The bottom contact of the pump housing 510, the lower end of plunger spring 530 are contacted with plunger spring seat 540540, and plunger spring seat 540 is enclosed on
On the lower end of plunger 520, and contacted with the roller body in rotor block 300.
Voltage stabilizing valve member 600 is arranged in pressure maintaining valve installation cavity 130, and the entrance in voltage stabilizing valve member 600 is with spill port E's
First end is connected, and the outlet in voltage stabilizing valve member 600 is connected by oil pipe with fuel tank.
Electromagnetic valve components 700 are arranged in magnetic valve installation cavity 514, and the electromagnetic valve components 700 include electromagnet 710, electricity
The tight cap 720 of magnet valve, armature 730, control valve element 740, armature guide sleeve 750, valve seat 760, magnetic valve spring 770 and magnetic valve bullet
Spring abutment 780.
The control centre part of valve element 740 is slidably mounted in control spool bore 515, and the inner of control valve element 740 has
One valve element control terminal 741, valve element control terminal 741 are extended into fuel chamber D, and the outer end of control valve element 740 extends into magnetic valve peace
It behave affectedly in 514 and is connected with armature 720.
Electromagnet 710 uses cylindrical outer shape, much smaller compared to former square electromagnet appearance and size, and technique
Property is more preferable.The inner of electromagnet 710 is located in magnetic valve installation cavity 514 and is fixed on plunges pump body by the tight cap 720 of magnetic valve
On 510, the inner of electromagnet 710 contacts with armature 720 and armature guide sleeve 730 is pressed into shape in magnetic valve installation cavity 514.
Armature 720 is located in armature guide sleeve 750 and by the guiding movement of armature guide sleeve 730.
Magnetic valve spring 770 is sleeved on by valve seat 760 and magnetic valve spring seat 780 on the outer end of control valve element 740, valve
Seat 760 is fitted in magnetic valve installation cavity 514 by armature guide sleeve 750, and valve seat 760 passes through armature guide sleeve 750 and electromagnetism
The bottom of chamber of valve installation cavity 514 carries out axial location restriction, and magnetic valve spring seat 780 moves together with control valve element 740.
The first conical seal (contact) face 515a is provided with the inner face of control spool bore 515, in the valve of control valve element 740
The second conical seal (contact) face 741a is provided with the outer face of core control terminal 741；When electromagnet 710 is powered, armature 720 is by electromagnetism
Iron 710 attracts to move out, and armature 720 drives control valve element 740 to move out, and bores the first conical seal (contact) face 515a and second
Shape sealing surface 741a sealings coordinate, and control spool bore 515 and fuel chamber D are sealed off；In 710 no power of electromagnet, control
Valve element 740 processed inwardly moves under the driving of magnetic valve spring 770, makes the first conical seal (contact) face 515a with controlling spool bore 515
Second conical seal (contact) face 741a is separated, and control spool bore 515 and fuel chamber D is sealed and conducted.
An annular is provided with the side face of control valve element 740 and crosses oil pocket 742, annular crosses oil pocket 742 and is located at valve element control
The outside at end 741 simultaneously connects with the second back oil road G the second end；Center oilhole 743, center are provided with control valve element 740
The oil pocket 514a that crosses that the both ends of oilhole 743 are crossed with annular in oil pocket 742, magnetic valve installation cavity 514 respectively is connected.
Block 810 and clamp nut 820 are arranged in block and clamp nut installation cavity 516, and the utility model is using gear
Two kinds of part combination forms of block and locking nut, for controlling valve element adjusting pad block compared to monoblock type, manufacturability is more preferable.
Clamp nut 820 screws in block and clamp nut installation cavity 516 and block 810 is pressed on into block and compresses spiral shell
In female installation cavity 516, the inner face of block 810 contacts with the inner face of the valve element control terminal 741 on control valve element 740.
Fuel-displaced valve member 900 is arranged in fuel-displaced valve member installation cavity 517, and fuel-displaced valve member 900 includes fuel-displaced plug screw
910th, oil outlet valve spring 920, fuel-displaced valve core 930 and ball 940, fuel-displaced plug screw 910 are screwed in fuel-displaced valve member installation cavity 517
And oil outlet valve spring 620, fuel-displaced valve core 930 and ball 640 are fitted in fuel-displaced valve member installation cavity 516.
The upper end of oil outlet valve spring 620 is connected with fuel-displaced plug screw 910, and lower end is connected with fuel-displaced valve core 930.
It is provided with conical seal (contact) face 517a in the bottom of chamber of fuel-displaced valve member installation cavity 517, fuel-displaced valve core 930 is by ball
940 are pressed in formation sealing on conical seal (contact) face 517a, when the fuel pressure of the lower section of ball 940 is more than the bullet of oil outlet valve spring 920
During power, fuel pressure jacks up ball 940 and conical seal (contact) face 517a is disengaged and opened fuel-displaced valve member 900.
The internal diameter that the lower end external diameter of fuel-displaced valve core 920 is less than fuel-displaced valve member installation cavity 517 forms an annular oil outlet chamber
950, the internal diameter of the external diameter of ball 940 again smaller than fuel-displaced valve member installation cavity 517；In fuel-displaced valve core 930 in the axial direction
It is provided with one and goes out oil hole 931, goes out oil hole and run through fuel-displaced valve core 930 about 931；Set in fuel-displaced plug screw 910 along axis
There is oil hole 911, go out the fuel-displaced plug screw 910 of the up/down perforation of oil hole 911, fuel-displaced plug screw 910 passes through high-pressure oil pipe and accumulator
Fuel inlet fitting 1100 in 1000 connects.
Accumulator 1000 is arranged on the oil feed pump pump housing 100 using fastener, and cavity volume is provided with accumulator 1000
1200, the cavity volume 1200 of accumulator 1000 is cross-shaped.
Be provided with four delivery connections 1300 on accumulator 1000, four delivery connections 1300 with accumulator 1000
Cavity volume 1200 connect, four delivery connections 1300 pass through hydraulic oil distribution pipe and connect each fuel injector.Accumulator 1000
Volume≤10cm of cavity volume 12003。
Pressure sensor 1400 is installed on accumulator 1000, the detector of pressure sensor 1400 gos deep into accumulator
In 1000 cavity volume 1200, to detect the pressure in the cavity volume 1200 of accumulator 1000.
Operation principle of the present utility model is as follows：
Pump oil route is as follows：
When camshaft 200 rotates, oil transfer pump 600 rotates, and at this moment the fuel oil in fuel tank passes through oil pipe, oil-feed screw
400th, oil transfer pump 600, annular oil-feed tank A, the first oil input channel B, annular oil cavity C, the second oil input channel F enter magnetic valve installation cavity
Crossing in oil pocket 514a in 514, unnecessary fuel oil is entered in pressure maintaining valve installation cavity 130 by spill port E in annular oil cavity C, is led to
Cross voltage stabilizing valve member 600 and oil pipe is expelled back into fuel tank.Fuel oil unnecessary in oil pocket 514a is crossed in magnetic valve installation cavity 514
Oil pocket 742, the second back oil road G, oil back chamber 512, the first back oil road 513 are crossed by center oilhole 743, annular and return to annular oil
In chamber C.
Plunger 520 camshaft 200, rotor block 300, plunger spring 530 driving under down moved from top dead centre when,
Now in the presence of oil outlet valve spring 920, ball 940 is pressed for the fuel-displaced valve core 930 in fuel-displaced valve member 900 and ball 940
Sealing is formed on conical seal (contact) face 517a, fuel-displaced valve member 900 is closed.The now no power of electromagnet 710, control
Valve element 740 processed inwardly moves in the presence of magnetic valve spring 770, makes the first conical seal (contact) face 515a and control spool bore 515
The second conical seal (contact) face 741a separation, by annular cross oil pocket 742 and fuel chamber D seal and conduct, fuel chamber D is in negative pressure shape
State.
The fuel oil crossed in oil pocket 514a in magnetic valve installation cavity 514 crosses oil pocket 742, the by center oilhole 743, annular
Enter fuel chamber D between one conical seal (contact) face 515a and the second conical seal (contact) face 741a, so as to complete oil-absorbing process.
When plunger 520 moves upwards, the fuel oil in fuel chamber D is compressed, now if the no power of electromagnet 710
When, control valve element 740 is in the presence of magnetic valve spring 770, the first conical seal (contact) face 515a and the of control spool bore 515
Two conical seal (contact) face 741a are still separated, and the fuel oil in fuel chamber D can pass through the first conical seal (contact) face 515a and the second taper again
Between sealing surface 741a, annular cross oil pocket 742, the second back oil road G, oil back chamber 512, the first back oil road 513, annular oil cavity C, return
Oilhole E enters in pressure maintaining valve installation cavity 130, and fuel tank is expelled back into by voltage stabilizing valve member 600 and oil pipe.Now fuel pressure
It is not enough to overcome the pressure of oil outlet valve spring 920 and oil pipe intermediate fuel oil to steel ball 940, so oil feed pump not fuel feeding.
When plunger 520 moves upwards, the fuel oil in fuel chamber D is compressed, when electromagnet 710 is powered, in electromagnetism
In the presence of power, armature 730 drives control valve element 740 to move out, and makes the first conical seal (contact) face 515a and the second cone seal
741a sealings in face coordinate, and control spool bore 515 and fuel chamber D are sealed off, so that the fuel pressure liter in fuel chamber D
Height, high pressure fuel overcome the pressure of oil outlet valve spring 920 and oil pipe intermediate fuel oil to steel ball 940, jack up steel ball 940 upwards, open
Fuel-displaced valve member 900, high pressure fuel in fuel chamber D by between ball 940 and conical seal (contact) face 517a, annular oil outlet chamber
950th, going out oil hole 931, going out oil hole 911, high-pressure oil pipe, accumulator in fuel-displaced plug screw 910 in fuel-displaced valve core 930
Pressure accumulation, the cavity volume of accumulator 1000 are carried out in the cavity volume 1200 that fuel inlet fitting 1100 in 1000 enters in accumulator 1000
High pressure fuel in 1200 after pressure accumulation is distributed to each by the delivery connection 1300 in accumulator 1000, hydraulic oil distribution pipe
Individual fuel injector.
Claims (8)
1. a kind of pump, rail integrated form co-rail fuel feed pump, including the oil feed pump pump housing and camshaft in the oil feed pump, rolling
Wheel component, plunger pump, voltage stabilizing valve member, oil-feed screw, electromagnetic valve components and fuel-displaced are installed on the pump housing of the plunger pump
Valve member a, it is characterised in that accumulator, the oil transfer pump are provided with also including an oil transfer pump and on the oil feed pump pump housing
Worked by the camshaft actuated, the fuel inlet fitting in the accumulator by high-pressure oil pipe and the delivery valve members,
At least one delivery connection is provided with the accumulator；The cam axle, on the one hand driven by the rotor block
Move the plunger upward and downward in the plunger pump and form hydraulic oil, on the other hand drive oil transportation pump work, the combustion into plunger pump
Oil pocket fuel feeding, the high pressure fuel that the plunger pump is formed enter institute by the fuel-displaced valve member, high-pressure oil pipe, fuel inlet fitting
State and pressure accumulation is carried out in the cavity volume of accumulator, the high pressure fuel in the cavity volume of the accumulator after pressure accumulation passes through the storage
Delivery connection, hydraulic oil distribution pipe in depressor are distributed to each fuel injector.
2. a kind of pump, rail integrated form co-rail fuel feed pump as claimed in claim 1, it is characterised in that the volume of the accumulator
Chamber is provided with four delivery connections to be cross-shaped on the accumulator, each delivery connection with the accumulator
Cavity volume connects.
3. a kind of pump, rail integrated form co-rail fuel feed pump as claimed in claim 1 or 2, it is characterised in that the appearance of the accumulator
Volume≤10cm of product chamber3。
4. a kind of pump, rail integrated form co-rail fuel feed pump as claimed in claim 1 or 2, it is characterised in that on the accumulator
Pressure sensor is installed, the detector of the pressure sensor gos deep into the cavity volume of the accumulator, to detect the storage
Pressure in the cavity volume of depressor.
5. a kind of pump, rail integrated form co-rail fuel feed pump as claimed in claim 1, it is characterised in that the oil transfer pump is blade
Formula oil transfer pump.
6. a kind of pump, rail integrated form co-rail fuel feed pump as claimed in claim 1 or 2, it is characterised in that the oil feed pump pump housing
Overall length L1 is 138mm, and cylinder centre line spacing L is 32mm, and the diameter of plunger d in plunger pump is 6mm, and the cam lift H on camshaft is
9mm。
7. a kind of pump, rail integrated form co-rail fuel feed pump as claimed in claim 1 or 2, it is characterised in that the oil feed pump pump housing
Inside be provided with camshaft installation cavity, plunger pump installation cavity, pressure maintaining valve installation cavity, annular oil-feed tank, the first oil input channel, spill port,
Oil-feed screw mounting hole, oil transfer pump installation cavity；The oil-feed screw mounting hole connects with the annular oil-feed tank, the oil transfer pump
Installation cavity connects with the annular oil-feed tank, and the annular oil-feed tank connects with the first end of first oil input channel, described time
The first end of oilhole connects with the pressure maintaining valve installation cavity；The axis of the camshaft installation cavity and the plunger pump installation cavity
Axis is mutually perpendicular to, and the axis of the axis of the pressure maintaining valve installation cavity and the plunger pump installation cavity is mutually perpendicular to；
The camshaft is arranged in the camshaft installation cavity by clutch shaft bearing, second bearing and bearing (ball) cover, described
Clutch shaft bearing, second bearing are arranged in the camshaft installation cavity, wherein clutch shaft bearing to supporting cam wheel axle the inner, the
Two bearings are arranged on the oil feed pump pump housing and pressed by fastener in the outer end of the camshaft, the bearing (ball) cover
In the second bearing；The centre position of the camshaft is provided with a driving cam；
The rotor block is arranged between the camshaft installation cavity and plunger pump installation cavity, and the rotor block passes through a rotation
Lock-screw on the oil feed pump pump housing carries out axially directed and circumferential restriction；Be provided with the rotor block one with
The roller of the driving cam driving contact；
Oil-feed screw in the oil-feed screw mounting hole, the oil-feed screw are connected by oil inlet pipe with fuel tank；
The oil transfer pump is arranged in the oil transfer pump installation cavity, and the oil-out of the oil transfer pump connects with the annular oil-feed tank
Logical, the oil inlet of the oil transfer pump is connected by the oil-feed screw mounting hole with the oil-feed screw；
The plunger pump is arranged in the plunger pump installation cavity, and the plunger pump includes plunges pump body, plunger, plunger spring,
An annular oil cavity is provided between the inner peripheral surface of the periphery of the plunges pump body and the plunger pump installation cavity, and in the post
A plunger installation cavity, oil back chamber, the first back oil road, fuel chamber, the second oil input channel, the second back oil road, electricity are provided with plug body
Magnet valve installation cavity, control spool bore, block and clamp nut installation cavity, fuel-displaced valve member installation cavity；Wherein described plunger installation
Chamber, fuel chamber, fuel-displaced valve member installation cavity are located on same axis and are interconnected, and the fuel chamber is located at plunger installation
Between the two, the fuel-displaced valve member installation cavity is located at the top of the fuel chamber for chamber, fuel-displaced valve member installation cavity；The electromagnetism
Valve installation cavity, control spool bore, block and clamp nut installation cavity be located on same axis and with the plunger installation cavity, fuel oil
Axis where chamber, fuel-displaced valve member installation cavity is mutually perpendicular to, the magnetic valve installation cavity, the control spool bore and the gear
Block and clamp nut installation cavity are respectively positioned at the axis where the plunger installation cavity, fuel chamber, fuel-displaced valve member installation cavity
Both sides, the magnetic valve installation cavity is by controlling spool bore to be connected with the fuel chamber, block and the clamp nut installation cavity
Connected with the fuel chamber；The oil back chamber is located on the side face of the plunger installation cavity and positioned at the lower section of the fuel chamber；
The annular oil cavity is connected with the second end of first oil input channel and connected with the first end of second oil input channel, and described
Second end of two oil input channels connect with the oil pocket of crossing in the magnetic valve installation cavity, oil back chamber one side with described second time
The first end connection of oil duct, on the other hand the first end with first back oil road connects, the second end of first back oil road
Connected with the annular oil cavity；The plunger installation cavity is inserted in the middle and upper part of the plunger by the bottom of the plunger installation cavity
Interior, the plunger spring is enclosed on the bottom of the plunger, wherein the upper end of the plunger spring and the bottom of the plunges pump body
Contact, the lower end of the plunger spring are touched with the plunger spring seated connection, and the plunger spring cover for seat is in the lower end of the plunger
On, and contacted with the roller body in the rotor block；
The voltage stabilizing valve member is arranged in the pressure maintaining valve installation cavity, the entrance in the voltage stabilizing valve member and the spill port
First end connection, the outlet in the voltage stabilizing valve member is connected by oil pipe with the fuel tank；
The electromagnetic valve components are arranged in the magnetic valve installation cavity, and it is tight that the electromagnetic valve components include electromagnet, magnetic valve
Cap, armature, control valve element, armature guide sleeve, valve seat, magnetic valve spring and magnetic valve spring seat, the control valve element centre one
Part is slidably mounted in the control spool bore, and the control valve in-core end has a valve element control terminal, the valve element control terminal
Extend into the fuel chamber, the outer end of the control valve element extends into the magnetic valve installation cavity and connected with the armature
Connect；The inner of the electromagnet is located in the magnetic valve installation cavity and is fixed on the plunges pump body by the tight cap of magnetic valve
On, the inner and armature of the electromagnet contacts and the armature is oriented into casing pressure shape in the magnetic valve installation cavity,
The armature is located in the armature guide sleeve and by the armature guide sleeve guiding movement；The magnetic valve spring passes through valve seat
With magnetic valve spring cover for seat on the outer end of the control valve element, the valve seat is fitted in described by the armature guide sleeve
In magnetic valve installation cavity, the valve seat carries out axial location by the bottom of chamber of the armature guide sleeve and the magnetic valve installation cavity
Limit；The magnetic valve spring seat moves together with the control valve element；The is provided with the control spool bore inner face
One conical seal (contact) face, the second conical seal (contact) face is provided with the outer face of the valve element control terminal of the control valve element；Described
When electromagnet is powered, the armature attracts to move out by the electromagnet, and the armature drives the control valve element outwards to transport
It is dynamic, first conical seal (contact) face is sealed with second conical seal (contact) face and coordinate, by the control spool bore and the combustion
Oil pocket seals off；In the electromagnet no power, the control valve element inwardly moves under magnetic valve spring driving, makes institute
State the first conical seal (contact) face to separate with second conical seal (contact) face, the control spool bore and fuel chamber sealing are led
It is logical；An annular is provided with the side face of the control valve element and crosses oil pocket, the annular crosses oil pocket and is located at the valve element control terminal
Outside and connected with the second end of second back oil road；The control valve in-core is provided with center oilhole, the center
The oil pocket of crossing that the both ends of oilhole are crossed in oil pocket, the magnetic valve installation cavity with the annular respectively connects；
The block and clamp nut are arranged in the block and clamp nut installation cavity, and the clamp nut screws in the gear
Be pressed in block and clamp nut installation cavity and by the block in block and the clamp nut installation cavity, the block it is interior
End face contacts with the inner face of the valve element control terminal on the control valve element；
Fuel-displaced valve member is arranged in the fuel-displaced valve member installation cavity, and the fuel-displaced valve member includes fuel-displaced plug screw, delivery valve
Spring, fuel-displaced valve core and ball, the fuel-displaced plug screw screw in the fuel-displaced valve member installation cavity and by the delivery valve bullets
Spring, fuel-displaced valve core and ball are fitted in the fuel-displaced valve member installation cavity, the upper end of the oil outlet valve spring with it is described go out
Whelk plug is connected, and the lower end of the oil outlet valve spring is connected with the fuel-displaced valve core；In the fuel-displaced valve member installation cavity
Bottom of chamber is provided with triconic sealing surface, and the ball is pressed on the triconic sealing surface and formed by the fuel-displaced valve core
Sealing, when fuel pressure below the ball is more than the elastic force of the oil outlet valve spring, fuel pressure is by the ball top
Rise and the triconic sealing surface disengages and opens the fuel-displaced valve member；The lower end external diameter of the fuel-displaced valve core is less than
The internal diameter of the fuel-displaced valve member installation cavity forms an annular oil outlet chamber, and the external diameter of the ball is again smaller than the fuel-displaced valve member
The internal diameter of installation cavity；The fuel-displaced valve core interior edge axis direction is provided with one first and goes out oil hole, described first is fuel-displaced logical
The fuel-displaced valve core is run through in hole up and down；Axis is provided with second in the fuel-displaced plug screw and goes out oil hole, described second is fuel-displaced
Fuel-displaced plug screw described in through hole up/down perforation, the fuel-displaced plug screw are connected by the fuel inlet fitting in high-pressure oil pipe and the accumulator
It is logical.
8. a kind of pump, rail integrated form co-rail fuel feed pump as claimed in claim 7, it is characterised in that the electromagnet is using circle
Cylindricality profile.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720781193.8U CN206972414U (en) | 2017-06-30 | 2017-06-30 | Pump, rail integrated form co-rail fuel feed pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720781193.8U CN206972414U (en) | 2017-06-30 | 2017-06-30 | Pump, rail integrated form co-rail fuel feed pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206972414U true CN206972414U (en) | 2018-02-06 |
Family
ID=61406611
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720781193.8U Active CN206972414U (en) | 2017-06-30 | 2017-06-30 | Pump, rail integrated form co-rail fuel feed pump |
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| Country | Link |
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| CN (1) | CN206972414U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114776502A (en) * | 2022-04-29 | 2022-07-22 | 中国北方发动机研究所(天津) | Planar sealing type high-pressure common-rail variable pump oil inlet valve |
-
2017
- 2017-06-30 CN CN201720781193.8U patent/CN206972414U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114776502A (en) * | 2022-04-29 | 2022-07-22 | 中国北方发动机研究所(天津) | Planar sealing type high-pressure common-rail variable pump oil inlet valve |
| CN114776502B (en) * | 2022-04-29 | 2023-07-18 | 中国北方发动机研究所(天津) | Plane sealing type oil inlet valve of high-pressure common rail variable pump |
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