CN106121888B - Single cylinder high pressure co-rail diesel pump group part for common rail system - Google Patents
Single cylinder high pressure co-rail diesel pump group part for common rail system Download PDFInfo
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- CN106121888B CN106121888B CN201610739230.9A CN201610739230A CN106121888B CN 106121888 B CN106121888 B CN 106121888B CN 201610739230 A CN201610739230 A CN 201610739230A CN 106121888 B CN106121888 B CN 106121888B
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- oil
- pump
- valve
- camshaft
- plunger
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M59/00—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps
- F02M59/02—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps of reciprocating-piston or reciprocating-cylinder type
- F02M59/10—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps of reciprocating-piston or reciprocating-cylinder type characterised by the piston-drive
- F02M59/102—Mechanical drive, e.g. tappets or cams
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M37/00—Apparatus or systems for feeding liquid fuel from storage containers to carburettors or fuel-injection apparatus; Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines
- F02M37/04—Feeding by means of driven pumps
- F02M37/045—Arrangements for driving rotary positive-displacement pumps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M59/00—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps
- F02M59/44—Details, components parts, or accessories not provided for in, or of interest apart from, the apparatus of groups F02M59/02 - F02M59/42; Pumps having transducers, e.g. to measure displacement of pump rack or piston
- F02M59/46—Valves
- F02M59/462—Delivery valves
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M59/00—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps
- F02M59/44—Details, components parts, or accessories not provided for in, or of interest apart from, the apparatus of groups F02M59/02 - F02M59/42; Pumps having transducers, e.g. to measure displacement of pump rack or piston
- F02M59/46—Valves
- F02M59/464—Inlet valves of the check valve type
Abstract
The invention discloses the single cylinder high pressure co-rail diesel pump group parts for common rail system, including the pump housing, pump oil component, oil transportation pump part, tappet body component, camshaft, dynamic structure, the pump housing is equipped with pump oil component and idler wheel body cavity, lower cam axocoel, fuel oil oil inlet passage, drainback passage, pump oil component coordinates with idler wheel coelomic space, tappet body component be located at pump oil component chamber lower part in idler wheel body cavity be clearance fit, a left side for camshaft, right both ends are respectively supported on the sliding bearing of pump housing both sides, shaft-cup plate is equipped on the outside of the sliding bearing of dynamic structure side, pump oil component includes plunger bushing, plunger, it is equipped with unidirectionally into delivery valve structure in the big axial bore one of the upper diameter of plunger bushing, the upper surface of plunger spring coordinates with the periphery of plunger bushing lower part, the lower face of plunger spring is connect with spring lower seat；It is stifled that proportioning valve, overflow valve, stream are equipped on oil inlet passage.
Description
Technical field
The present invention relates to Diesel Engine Technique Field more particularly to a kind of single cylinder high pressure co-rail diesel pumps for common rail system
Component.
Background technology
As national emission regulation upgrades, in order to meet, state three, state four be non-road and vehicle device state four, five small-sized bavin of state
Oil machine requirement needs to design and develop high pressure co-rail diesel pump group part, to meet emission regulation demand.Height in the prior art
Pressure common rail pump mostly uses two cylinders and the above structure, volume are larger.The more supply capabilities of cylinder number are far beyond small diesel engine demand.It is existing
High voltage common rail pump oil transfer pump mostly use vane pump, manufacture, working service are of high cost, are susceptible to failure.
Invention content
For solving the above-mentioned problems of the prior art, it is an object of the present invention to provide a kind of lists for common rail system
Cylinder high pressure co-rail diesel pump group part；High pressure co-rail diesel pump group part of the present invention is compact-sized, light, small, use reliability
Height, manufacture, working service are at low cost.
The present invention solve technical problem technical solution be：
A kind of single cylinder high pressure co-rail diesel pump group part for common rail system, including the pump housing, pump oil component, oil transportation pumping section
Part, tappet body component, camshaft, dynamic structure, the pump housing be equipped with pump oil component and idler wheel body cavity, lower cam axocoel,
Fuel oil oil inlet passage, drainback passage, pump oil component coordinate with idler wheel coelomic space, and tappet body component is located at pump oil component chamber
Lower part and idler wheel body cavity are clearance fit, and the left and right both ends of camshaft are respectively supported on the sliding bearing of pump housing both sides,
Dynamic structure side is that shaft-cup plate is equipped on the outside of the sliding bearing in left side, and the oil transportation pump part connects with camshaft one end flat key
It connects, the camshaft other end is connect with dynamic structure, and three peach cams are equipped in the middle part of camshaft, and the cam is matched with tappet body component
It closes, cam rotation driving tappet body component is located at column above in idler wheel intracavitary linear reciprocating motion, tappet body component driving
Plug completes oil suction again and again and pressure oil；The shaft-cup plate is being equipped with several oil return apertures higher than pump housing position of center line,
End cap is equipped with outside framework oil seal with camshaft cooperation position；The pump oil component includes plunger bushing, plunger, the plunger bushing it is outer
Cylindrical surface and idler wheel coelomic space coordinate, and unidirectional oil inlet knot is equipped in the big axial bore one of the upper diameter of the plunger bushing
Structure, unidirectional oil outlet structure, are equipped with plunger spring at the smaller outer circle of the plunger bushing lower diameter, the upper surface of plunger spring with
The periphery cooperation of plunger bushing lower part, the lower face of plunger spring are connect with spring lower seat；
Proportioning valve is equipped on oil inlet passage, receiving common rail system ECU instruction controls by proportioning valve enters in the pump housing
Diesel oil amount；Overflow valve is equipped on oil inlet passage, it, will when the overflow valve ensures that the diesel pressure of oil transfer pump supply is more than the upper limit
Part diesel oil overflow oil return box and fuel oil oil inlet；Choke plug is equipped on oil inlet passage, the choke plug guarantee needs ratio
Fuel oil under the operating mode that valve is closed by proportioning valve leakage leads back to fuel tank；The choke plug is set to proportioning valve rear end and overflow valve rear end
On the channel of starting position, fuel oil flows to overflow valve side by proportioning valve side；
It is equipped with threaded hole II in the middle part side of the pump housing, the threaded hole II coordinates with bolt II, and the bolt II is equipped with
The radial hole and axial hole II of perforation, bolt II are connect with engine oil tube, and fuel oil is entered by bolt II in the pump housing；
It is equipped with oil hole in the middle part of the pump housing side vertical with threaded hole II, the oil hole coordinates with bolt III；Institute
It states radial hole and axial hole II, the bolt III of the bolt III equipped with perforation to connect with machine oil pipe, machine oil is entered by bolt III
Into the pump housing.
The lower support of the unidirectional oil charging structure in the lumen channels upper surface of plunger bushing, the unidirectional oil outlet structure
Lower part is connect with the top of unidirectional oil charging structure, and the top of the unidirectional oil outlet structure is connect with fastening seat, fastens seat and plunger
Set is connected by screw-thread fit, and the plunger bushing lower part is connect with tappet body component, and tappet body component lower part coordinates with camshaft,
Oil transfer pump is connect with camshaft one end；
The unidirectional oil charging structure includes oil inlet valve spring, inlet valve, oil inlet valve seat, the bottom of oil inlet valve seat and plunger bushing
The cooperation of lumen channels upper surface, the top seal face of inlet valve and the top oil outlet sealing surface of oil inlet valve seat coordinate, oil inlet
Pilot hole coordinates in the lower part guide surface of valve and the lower part of oil inlet valve seat, sets that there are two oil inlets on the radial wall of oil inlet valve seat
Mouthful, the periphery of pilot hole is equipped with several fuel feed holes in the lower part of oil inlet valve seat.
The unidirectional oil outlet structure includes the spring seat of honour, oil outlet valve spring, delivery valve, delivery valve seat, the spring seat of honour
Coordinate with one inner wall of cavity of fastening seat, the upper surface and the lower face of fastening seat of delivery valve seat coordinate, and the top of delivery valve is close
The top oil outlet sealing surface of cover and delivery valve seat coordinates, and is oriented in the lower part guide surface of delivery valve and the lower part of delivery valve seat
Hole coordinates, the upper end of the oil outlet valve spring and lower recess cooperation, the lower end of oil outlet valve spring and the delivery valve at the spring seat of honour
Upper surface cooperation, the spring seat of honour is equipped with high pressure oil hole, and fastening seat top is equipped with high-pressure outlet, and fuel oil passes through high-pressure oil pipe
It gets in common rail pipe；
The top in the top seal face of the delivery valve, the top oil outlet sealing surface of delivery valve seat and inlet valve is close
Cover, oil inlet valve seat top oil outlet sealing surface use circular conical surface.
The tappet body component includes tappet body, idler wheel, roller pin, and roller housing is on roller pin, roller pin and tappet
The pin hole of body lower part coordinates, and tappet body top is equipped with very column recesses, and the idler wheel uses crown design, is equipped in pump housing side
Tappet body positioning pin limits tappet body component in pump housing pump oil component intracavitary axial rotation by tappet body positioning pin, ensures
Idler wheel rotation center remains parallel with camshaft；The spring lower seat lower part coordinates with very column recesses, passes through tappet body
Groove limits, and the lower end of plunger coordinates after the axial interstitial hole of spring lower seat with idler wheel；Among the idler wheel and camshaft
The cam engagement of position；Another end cone face of camshaft is tightened by conical surface fitting, realizes the power transmission of dynamic structure；
The camshaft is supported on the camshaft intracavitary of the pump housing by two sliding bearings, and annular groove is opened up on sliding bearing；
It is equipped with anti-attrition gasket on the camshaft of the inside of sliding bearing, the axial float of camshaft is adjusted by two anti-attrition gaskets
Amount；Inlet valve, delivery valve use conical surface seal, and there is guide frame to ensure being capable of smooth return in the case of oil pump is inclined；
It is equipped with Double-lip framework oil sealing in the outside of the sliding bearing close to oil transfer pump side, by Double-lip framework oil sealing by machine
The diesel oil of oil and oil transfer pump separates.
The oil transfer pump uses internal messing cycloidal type oil transfer pump, low speed supply capability much to surmount vane-type fuel transfer pump knot
Structure；Oil transfer pump cover board is equipped with pressure-relief valve structure,；Oil transfer pump includes valve plate, shell, outer rotor, internal rotor, cover board, wheel shaft
Drive internal rotor rotation to drive outer rotor to rotate by oil transfer pump key, outer rotor is differently formed partially with internal rotor rotation center
The heart；Eccentric structure makes to form the different section of volume in inner and outer rotors rotary course, valve plate from opened up on cover board and different appearances
The annular groove of product cooperation, completes pump oil process；Plate is equipped with relief valve, ensures that oil transfer pump speedy carding process diesel pressure slowly rises；
The valve plate is being equipped with sealing ring four with the pump housing, housing mating position respectively, and sealing is equipped in shell and cover board cooperation position
Circle；Camshaft rotates cam surface support tappet body and is moved back and forth in pump oil component intracavitary；Plunger spring ensures tappet body component
Always it is contacted with cam of camshaft face and completes aspiration procedure with the returning quickly of plunger.
Be respectively equipped with oil inlet swivel nut on fuel oil fuel feed hole I, threaded hole II, the bolt I, bolt II respectively with it is respective
Oil inlet swivel nut connects.
It is tightly connected by sealing ring two between fastening seat and the plunger bushing, passes through sealing ring between plunger bushing and the pump housing
Three are tightly connected realization sealing.
The pump housing is equipped with groove in the outer end face of the pump housing and shaft-cup plate cooperation position, and sealing ring is equipped in the groove,
Sealing ring is sleeved on shaft-cup plate external cylindrical surface, is realized the sealing of the pump housing and shaft-cup plate cooperation position, is prevented engine motor oil from leaking.
Beneficial effects of the present invention：
1. high pressure co-rail diesel pump group part of the present invention is compact-sized, light, small, use reliability is high, and manufacture uses
Maintenance cost is low.Cam and tappet body component coordinate, cam rotation driving tappet body component in idler wheel intracavitary linear reciprocating motion,
Oil suction again and again and pressure oil are completed to which tappet body component driving is located at plunger above；The shaft-cup plate higher than
Pump housing position of center line is set there are four oil return aperture, and the end cap and camshaft cooperation position are equipped with outside framework oil seal, on shaft-cup plate
Outside framework oil seal limits machine oil only by four aperture oil returns of shaft-cup plate upper end, ensures the machine oil of camshaft intracavitary in non-road in this way
Amount keeps sufficient under particular job operating mode such as road mechanical tilt, is capable of the parts of good lubrication sliding relatively, solves existing
Having in technology figure does not have outside framework oil seal, machine oil to be flowed out with regard to direct-axis cover board oil sealing installation site, to oil pump intracavitary machine oil liquid occur
Face is relatively low, is not easy the problem of lubricating oil pump assembly.
Proportioning valve is equipped on oil inlet passage, receiving common rail system ECU instruction controls by proportioning valve enters in the pump housing
Diesel oil amount；Overflow valve is equipped on oil inlet passage, it, will when the overflow valve ensures that the diesel pressure of oil transfer pump supply is more than the upper limit
Part diesel oil overflow oil return box and fuel oil oil inlet.For ensureing precompressed diesel oil that oil transfer pump provides into pressure before pump oil system
It is constant, to ensure the stability of common rail overpressure.Choke plug is equipped on oil inlet passage, the choke plug guarantee needs ratio
Fuel oil under the operating mode that valve is closed by proportioning valve leakage leads back to fuel tank；
2. oil transfer pump uses inner and outer rotors structure, low speed supply capability strong.Relief valve is set on oil transfer pump cover board, is ensured defeated
Output pressure slowly rises when oil pump runs at high speed.Except oil transportation pump discharge is arranged in the side of pump, filter is introduced by oil pipe
It is re-introduced into the pump housing.High pressure co-rail diesel pump group part of the present invention is positive pressure pump, can increase fine filter between oil transfer pump and the pump housing,
Increase system filter effect；This structure can also reduce the requirement to filter, advantageously reduce cost；Due to fine filter
Middle pressure is higher, is conducive to the exhaust of common rail system, and it is convenient to start.
3. the pump housing of high pressure co-rail diesel pump group part of the present invention makes left-hand mounted fuel injection pump, right-hand mounted fuel injection pump, a left side using cleverly structure design
Rotation pump, dextrorotation pump can be used and reduce die cost with a pump housing blank, and working position needed for the pump housing is largely constant, section
Save cutter and fixture cost.
4. idler wheel uses crown design, contact area can be increased, tappet body positioning pin is equipped in pump housing side, by very
Cylinder positioning pin limits tappet body component in pump housing pump oil component intracavitary axial rotation, ensures idler wheel rotation center and camshaft
Remain parallel；The spring lower seat lower part coordinates with very column recesses, and by enduring column recesses limit, the lower end of plunger is worn
Coordinate with idler wheel after crossing the axial interstitial hole of spring lower seat；The cam engagement of the idler wheel and camshaft centre position；Camshaft
Another end cone face is tightened by conical surface fitting, realizes the power transmission of dynamic structure.Camshaft is supported by two sliding bearings
Annular groove is opened up in the camshaft intracavitary of the pump housing, sliding bearing, is convenient for machine oil forced feed lubrication.Cam in the inside of sliding bearing
Axis is equipped with anti-attrition gasket, and the axial movement value of camshaft is adjusted by two anti-attrition gaskets；Inlet valve, delivery valve use the conical surface
Sealing, there is guide frame to ensure being capable of smooth return in the case of oil pump is inclined；In the sliding bearing close to oil transfer pump side
Outside be equipped with Double-lip framework oil sealing, the diesel oil of machine oil and oil transfer pump is separated by Double-lip framework oil sealing.
5. oil transfer pump uses internal messing cycloidal type oil transfer pump, low speed supply capability much to surmount vane-type fuel transfer pump structure；
Oil transfer pump cover board is equipped with pressure-relief valve structure, meets diesel pressure under the high speed conditions of oil transfer pump and slowly rises, defeated to ensure
The use reliability of oil pump.Oil transfer pump includes valve plate, shell, outer rotor, internal rotor, cover board, and wheel shaft passes through oil transfer pump key band
To drive outer rotor to rotate, outer rotor is differently formed bias with internal rotor rotation center for dynamic internal rotor rotation.Eccentric structure makes
The different section of volume is formed in inner and outer rotors rotary course, and the annular groove with the cooperation of not co-content is opened up on valve plate and cover board,
Complete pump oil process；Plate is equipped with relief valve, ensures that oil transfer pump speedy carding process diesel pressure is constant；The valve plate respectively with
The pump housing, housing mating position are equipped with sealing ring four, and sealing ring is equipped in shell and cover board cooperation position.Camshaft rotates cam surface
Tappet body is supported to be moved back and forth in pump oil component intracavitary.Plunger spring ensures that tappet body component connects with cam of camshaft face always
It touches and completes aspiration procedure with the returning quickly of plunger.
6. be respectively equipped with oil inlet swivel nut on fuel oil fuel feed hole I, threaded hole II, the bolt I, bolt II respectively with respectively
From oil inlet swivel nut connection.Using oil inlet swivel nut be bolted, bolt repeatedly dismounting be hardly damaged, avoid bolt and aluminium
When the pump housing connects, the pump housing caused by repeatedly being dismantled due to bolt is damaged, and the operation and maintenance replacement cost of pump is reduced.
Description of the drawings
Fig. 1 is the front view of the high pressure co-rail diesel pump group part of the present invention；
Fig. 2 is the left view of Fig. 1；
Fig. 3 is the B-B sectional views of Fig. 2；
Fig. 4 is the C-C sectional views of Fig. 1；
Fig. 5 is the A-A partial sectional views of Fig. 2；
Fig. 6 is the rear axle cover board machine oil-hole location schematic diagram of the prior art；
Fig. 7 is the rear axle cover board machine oil-hole location schematic diagram of the present invention.
Specific implementation mode
For a better understanding of the present invention, embodiments of the present invention are explained in detail below in conjunction with the accompanying drawings.
As shown in Figures 1 to 7, a kind of single cylinder high pressure co-rail diesel pump group part for common rail system, including the pump housing 19, pump
Oily component (2-12), oil transportation pump part（26-30）, tappet body component（34-36）, camshaft 14, dynamic structure, the pump housing
Equipped with the pump body that pump oil component and idler wheel body cavity, lower cam axocoel, fuel oil oil inlet passage, drainback passage are arranged, pump
Oily component coordinates with idler wheel coelomic space, and tappet body component is located at pump oil component chamber lower part, matches for gap with idler wheel body cavity
It closes, the left and right both ends of camshaft are respectively supported on the sliding bearing of pump housing both sides, are the sliding in left side in dynamic structure side
Shaft-cup plate 15 is equipped on the outside of bearing, the oil transportation pump part is connect with camshaft one end flat key, the camshaft other end and power knot
Structure connects, and three peach cams are equipped in the middle part of camshaft, and the cam coordinates with tappet body component, cam rotation driving tappet body component
In idler wheel intracavitary linear reciprocating motion, to which tappet body component driving is located at the oil suction of the completion of plunger above again and again
With pressure oil.The shaft-cup plate is set higher than pump housing position of center line there are four oil return aperture, end cap 15 and camshaft cooperation position
Equipped with outside framework oil seal 13, shaft-cup plate upper skeleton oil sealing 13 limits machine oil only by four aperture oil returns 41 of shaft-cup plate upper end, such as
Shown in Fig. 6, Fig. 7, ensure that the machine oil of camshaft intracavitary is measured holding under particular job operating mode such as non-rice habitats mechanical tilt and filled in this way
Foot is capable of the parts of good lubrication sliding relatively.Solving 42 position of oil return hole in prior art Fig. 6 does not have skeleton oily
Envelope 13, machine oil are flowed out with regard to direct-axis cover board oil sealing installation site, and to occur, oil pump intracavitary machine oil liquid level is relatively low, is not easy grease pump
The problem of assembly.The pump oil component includes plunger bushing 5, plunger 11, between the external cylindrical surface and idler wheel body cavity of the plunger bushing 5
Gap coordinates, and unidirectional oil charging structure, unidirectional oil outlet structure, institute are equipped in the big axial bore one of the upper diameter of the plunger bushing 5
It states and is equipped with plunger spring 10 at the smaller outer circle of 5 lower diameter of plunger bushing, upper surface and 5 lower part of plunger bushing of plunger spring 10
Periphery coordinates, the lower face of plunger spring 10 is connect with spring lower seat 12.
Proportioning valve 21 is equipped on oil inlet passage, receiving common rail system ECU instruction controls by proportioning valve 21 enters the pump housing
Interior diesel oil amount.Overflow valve 40 is equipped on oil inlet passage, the overflow valve 40 ensures that the diesel pressure of oil transfer pump supply is more than
When the upper limit, by part diesel oil overflow oil return box and fuel oil oil inlet.For ensureing precompressed diesel oil that oil transfer pump provides into pump oil
Pressure is constant before system, to ensure the stability of common rail overpressure.Choke plug 42, the choke plug are equipped on oil inlet passage
42 ensure that the fuel oil that proportioning valve is revealed is led back to fuel tank under the operating mode for needing proportioning valve 21 to close（Proportioning valve is side valve type, is closed
When gap have fuel oil leakage）.The choke plug 42 is set to the channel of 21 rear end of proportioning valve and 40 rear end starting position of overflow valve
On, fuel oil flows to 40 side of overflow valve by 21 side of proportioning valve.
It is equipped with fuel oil fuel feed hole I in the top side of the pump housing 19, the fuel oil fuel feed hole I coordinates with bolt I 18.The spiral shell
Bolt I 18 is equipped with the radial hole of perforation and axial hole I, bolt I 18 are connect with engine oil tube, and fuel oil is entered by bolt I 18
In the pump housing.
It is equipped with threaded hole II in the middle part side of the pump housing 19, the threaded hole II coordinates with bolt II 32.The bolt II
32 radial holes 321 and axial hole II 322, bolt II 32 equipped with perforation are connect with engine oil tube, and fuel oil passes through bolt II 32
It enters in the pump housing.
It is equipped with oil hole in the middle part of the pump housing 19 side vertical with threaded hole II, the oil hole is matched with bolt III 39
It closes.The bolt III 39 is equipped with the radial hole of perforation and axial hole II, the bolt III 39 are connect with machine oil pipe, and machine oil passes through 39
It enters in the pump housing.
Be respectively equipped with oil inlet swivel nut on fuel oil fuel feed hole I, threaded hole II, the bolt I 18, bolt II 32 respectively with respectively
From oil inlet swivel nut connection.Using oil inlet swivel nut be bolted, bolt repeatedly dismounting be hardly damaged, avoid bolt and aluminium
When the pump housing connects, the pump housing caused by repeatedly being dismantled due to bolt is damaged, and the operation and maintenance replacement cost of pump is reduced.
The lower support of the unidirectional oil charging structure is in the lumen channels upper surface of plunger bushing 5, the unidirectional oil outlet structure
Lower part connect with the top of unidirectional oil charging structure, the top of the unidirectional oil outlet structure connect with fastening seat 1, fasten seat 1 and
Plunger bushing 5 is connected by screw-thread fit, and 5 lower part of the plunger bushing is connect with tappet body component, tappet body component lower part and cam
Axis 14 coordinates, and oil transfer pump is connect with 14 one end of camshaft.
The unidirectional oil charging structure includes oil inlet valve spring 7, inlet valve 8, oil inlet valve seat 9, the bottom of oil inlet valve seat 9 and column
The lumen channels upper surface of plug sleeve 5 coordinates, and the top seal face of inlet valve 8 is matched with the top oil outlet sealing surface of oil inlet valve seat 9
It closes, the lower part guide surface of inlet valve 8 coordinates with pilot hole in the lower part of oil inlet valve seat 9, is equipped on the radial wall of oil inlet valve seat 9
Two oil inlets, the periphery of pilot hole is equipped with several fuel feed holes in the lower part of oil inlet valve seat 9.
The unidirectional oil outlet structure includes the spring seat of honour 2, oil outlet valve spring 3, delivery valve 4, delivery valve seat 6, the spring
The seat of honour 2 and one inner wall of cavity of fastening seat 1 coordinate, and the upper surface and the lower face of fastening seat 1 of delivery valve seat 6 coordinate, delivery valve 4
The top oil outlet sealing surface of top seal face and delivery valve seat 6 coordinate, lower part guide surface and the delivery valve seat 6 of delivery valve 4
Lower part in pilot hole cooperation, the upper end of the oil outlet valve spring 3 and the lower recess cooperation at the spring seat of honour 2, oil outlet valve spring 3
The upper surface of lower end and delivery valve 4 coordinate, the spring seat of honour 2 is equipped with high pressure oil hole, and 1 top of fastening seat is equipped with high extrude
Mouthful, fuel oil is got to by high-pressure oil pipe in common rail pipe.
Top seal face, the top oil outlet sealing surface of delivery valve seat 6 and the top of inlet valve 8 of the delivery valve 4
Sealing surface, oil inlet valve seat 9 top oil outlet sealing surface use circular conical surface.It is sealed using circular conical surface, and lower part uses guide surface
Mechanism meets the smooth centering return of non-rice habitats machinery special operation condition lower valve.
The tappet body component includes tappet body 34, idler wheel 35, roller pin 36, and idler wheel 35 is sleeved on roller pin 36, rolling
It takes turns pin 36 and the pin hole of 34 lower part of tappet body coordinates, 34 top of tappet body is equipped with very column recesses, and the idler wheel 35 uses cydariform
Design, can increase contact area.It is equipped with tappet body positioning pin 33 in pump housing side, tappet is limited by tappet body positioning pin 33
Body component ensures that idler wheel rotation center remains parallel with camshaft in pump housing pump oil component intracavitary axial rotation.It is described
12 lower part of spring lower seat coordinates with very column recesses, and by enduring column recesses limit, the lower end of plunger 11 passes through spring lower seat 12
Axial interstitial hole after with idler wheel 35 coordinate.The cam engagement of the idler wheel 35 and 14 centre position of camshaft.Camshaft 14 is another
One end cone face is tightened by conical surface fitting, realizes the power transmission of dynamic structure.
The camshaft 14 is supported on the camshaft intracavitary of the pump housing by two sliding bearings 23, and ring is opened up on sliding bearing
Slot is convenient for machine oil forced feed lubrication.It is equipped with anti-attrition gasket 22 on the camshaft 14 of the inside of sliding bearing 23, passes through two anti-attritions
Gasket 22 adjusts the axial movement value of camshaft.Inlet valve, delivery valve use conical surface seal, and ensure oil pump with guide frame
It being capable of smooth return in the case of inclined.
It is equipped with Double-lip framework oil sealing 24 in the outside of the sliding bearing 23 close to oil transfer pump side, passes through Double-lip framework oil sealing
24 separate the diesel oil of machine oil and oil transfer pump, ensure that two kinds of oil do not pollute mutually.
The oil transfer pump uses internal messing cycloidal type oil transfer pump, low speed supply capability much to surmount vane-type fuel transfer pump knot
Structure.Oil transfer pump cover board is equipped with pressure-relief valve structure, meets diesel pressure under the high speed conditions of oil transfer pump and slowly rises, to ensure
The use reliability of oil transfer pump.Oil transfer pump includes valve plate 26, shell 27, outer rotor 28, internal rotor 29, cover board 30.Camshaft
14 drive the rotation of internal rotor 29 to drive outer rotor 28 to rotate by oil transfer pump key 31, and outer rotor and internal rotor rotation center are not
It is eccentric with being formed.Eccentric structure makes to form the different section of volume in inner and outer rotors rotary course, and valve plate is opened up on cover board
With the annular groove of not co-content cooperation, pump oil process is completed.Cover board is equipped with relief valve 43, ensures oil transfer pump speedy carding process diesel oil pressure
Power slowly rises.The valve plate 26 is being equipped with sealing ring 4 25 with the pump housing, housing mating position respectively, in shell 27 and cover board
30 cooperation positions are equipped with sealing ring.
Camshaft rotates cam surface support tappet body and is moved back and forth in pump oil component intracavitary.Plunger spring 10 ensures tappet
Body component is contacted with cam of camshaft face always completes aspiration procedure with the returning quickly of plunger.
It is tightly connected by sealing ring 2 16 between the fastening seat 1 and plunger bushing 5, is led between plunger bushing 5 and the pump housing 19
It crosses sealing ring 3 20 and is tightly connected realization sealing.
The pump housing is equipped with groove in the outer end face of the pump housing and shaft-cup plate cooperation position, and sealing ring is equipped in the groove
38, sealing ring 38 is sleeved on shaft-cup plate external cylindrical surface, is realized the sealing of the pump housing and shaft-cup plate cooperation position, is prevented engine motor oil
It leaks.
Although above-mentioned be described the specific implementation mode of invention in conjunction with attached drawing, not to the scope of the present invention
Limitation, based on the technical solutions of the present invention, those skilled in the art, which need not make the creative labor, to be made
Various modifications or changes still within protection scope of the present invention.
Claims (8)
1. a kind of single cylinder high pressure co-rail diesel pump group part for common rail system, characterized in that including the pump housing, pump oil component,
Oil transportation pump part, tappet body component, camshaft, dynamic structure, it is convex that the pump housing is equipped with pump oil component and idler wheel body cavity, lower part
Axocoel, fuel oil oil inlet passage, drainback passage are taken turns, pump oil component coordinates with idler wheel coelomic space, and tappet body component is located at pump oil
Component chamber lower part and idler wheel body cavity are clearance fit, and the left and right both ends of camshaft are respectively supported at the sliding axle of pump housing both sides
It holds, is to be equipped with shaft-cup plate on the outside of the sliding bearing in left side in dynamic structure side, the oil transportation pump part and camshaft one end
Flat key connects, and the camshaft other end is connect with dynamic structure, and three peach cams, the cam and very trunk portion are equipped in the middle part of camshaft
Part coordinates, and cam rotation driving tappet body component is located above in idler wheel intracavitary linear reciprocating motion, tappet body component driving
Plunger complete oil suction again and again and pressure oil；The shaft-cup plate is small equipped with several oil returns higher than pump housing position of center line
Hole, end cap are equipped with outside framework oil seal with camshaft cooperation position；The pump oil component includes plunger bushing, plunger, the plunger bushing
External cylindrical surface and idler wheel coelomic space coordinate, be equipped with unidirectional oil inlet in the big axial bore one of the upper diameter of the plunger bushing
Structure, unidirectional oil outlet structure are equipped with plunger spring, the upper surface of plunger spring at the smaller outer circle of the plunger bushing lower diameter
It is connect with spring lower seat with the lower face of the cooperation of the periphery of plunger bushing lower part, plunger spring；
It is equipped with proportioning valve on oil inlet passage, the diesel oil that common rail system ECU instruction controls enter in the pump housing is received by proportioning valve
Amount；Overflow valve is equipped on oil inlet passage, when the overflow valve ensures that the diesel pressure of oil transfer pump supply is more than the upper limit, by part
Diesel oil overflow oil return box and fuel oil oil inlet；Choke plug is equipped on oil inlet passage, the choke plug guarantee needs proportioning valve to close
The fuel oil that proportioning valve is revealed is led back into fuel tank under the operating mode closed；The choke plug starts set on proportioning valve rear end with overflow valve rear end
On the channel of position, fuel oil flows to overflow valve side by proportioning valve side；
It is equipped with fuel oil fuel feed hole I in the top side of the pump housing, the fuel oil fuel feed hole I coordinates with bolt I, and the bolt I is equipped with
The radial hole and axial hole I of perforation, bolt I are connect with engine oil tube, and fuel oil is entered by bolt I in the pump housing；
It is equipped with threaded hole II in the middle part side of the pump housing, the threaded hole II coordinates with bolt II, and the bolt II is equipped with perforation
Radial hole and axial hole II, bolt II connect with engine oil tube, fuel oil is entered by bolt II in the pump housing；
It is equipped with oil hole in the middle part of the pump housing side vertical with threaded hole II, the oil hole coordinates with bolt III；The spiral shell
Bolt III is equipped with the radial hole of perforation and axial hole II, the bolt III are connect with machine oil pipe, and machine oil enters pump by bolt III
In body.
2. being used for the single cylinder high pressure co-rail diesel pump group part of common rail system as described in claim 1, characterized in that described unidirectional
The lower support of oil charging structure is in the lumen channels upper surface of plunger bushing, the lower part of the unidirectional oil outlet structure and unidirectional oil inlet knot
The top of structure connects, and the top of the unidirectional oil outlet structure is connect with fastening seat, and fastening seat is connected with plunger bushing by screw-thread fit
It connects, the plunger bushing lower part is connect with tappet body component, and tappet body component lower part coordinates with camshaft, oil transfer pump and camshaft one
End connection；
The unidirectional oil charging structure includes oil inlet valve spring, inlet valve, oil inlet valve seat, the bottom of oil inlet valve seat and plunger bushing it is interior
Chamber groove upper surface coordinates, and the top seal face of inlet valve coordinates with the top oil outlet sealing surface of oil inlet valve seat, inlet valve
Pilot hole coordinates in the lower part of lower part guide surface and oil inlet valve seat, sets on the radial wall of oil inlet valve seat there are two oil inlet,
The periphery of pilot hole is equipped with several fuel feed holes in the lower part of oil inlet valve seat.
3. being used for the single cylinder high pressure co-rail diesel pump group part of common rail system as described in claim 1, characterized in that described unidirectional
Oil outlet structure includes the spring seat of honour, oil outlet valve spring, delivery valve, delivery valve seat, the cavity one at the spring seat of honour and fastening seat
Inner wall coordinates, and the upper surface of delivery valve seat and the lower face of fastening seat coordinate, the top seal face of delivery valve and delivery valve seat
Top oil outlet sealing surface coordinates, and pilot hole cooperation, described fuel-displaced in the lower part guide surface of delivery valve and the lower part of delivery valve seat
The upper end of valve spring and the lower recess cooperation at the spring seat of honour, the upper surface cooperation of the lower end of oil outlet valve spring and delivery valve, institute
It states the spring seat of honour and is equipped with high pressure oil hole, fastening seat top is equipped with high-pressure outlet, and fuel oil is got to by high-pressure oil pipe in common rail pipe；
The top seal face of the delivery valve, the top oil outlet sealing surface of delivery valve seat and inlet valve top seal face,
The top oil outlet sealing surface of oil inlet valve seat uses circular conical surface.
4. being used for the single cylinder high pressure co-rail diesel pump group part of common rail system as described in claim 1, characterized in that the tappet
Body component includes tappet body, idler wheel, roller pin, and on roller pin, roller pin and the pin hole of tappet body lower part coordinate roller housing,
Tappet body top is equipped with very column recesses, and the idler wheel uses crown design, is equipped with tappet body positioning pin in pump housing side, passes through
Tappet body positioning pin limits tappet body component in pump housing pump oil component intracavitary axial rotation, ensures idler wheel rotation center and cam
Axis remains parallel；The spring lower seat lower part coordinates with very column recesses, by enduring column recesses limit, the lower end of plunger
Coordinate with idler wheel after the axial interstitial hole of spring lower seat；The cam engagement of the idler wheel and camshaft centre position；Cam
Another end cone face of axis is tightened by conical surface fitting, realizes the power transmission of dynamic structure；
The camshaft is supported on the camshaft intracavitary of the pump housing by two sliding bearings, and annular groove is opened up on sliding bearing；In cunning
The camshaft of the inside of dynamic bearing is equipped with anti-attrition gasket, and the axial movement value of camshaft is adjusted by two anti-attrition gaskets；Into
Fuel tap, delivery valve use conical surface seal, and there is guide frame to ensure being capable of smooth return in the case of oil pump is inclined；
Close to oil transfer pump side sliding bearing outside be equipped with Double-lip framework oil sealing, by Double-lip framework oil sealing by machine oil with
The diesel oil of oil transfer pump separates.
5. being used for the single cylinder high pressure co-rail diesel pump group part of common rail system as described in claim 1, characterized in that described defeated
Oil pump uses internal messing cycloidal type oil transfer pump, low speed supply capability much to surmount vane-type fuel transfer pump structure；On oil transfer pump cover board
Equipped with pressure-relief valve structure；Oil transfer pump includes valve plate, shell, outer rotor, internal rotor, cover board, and wheel shaft is driven by oil transfer pump key
Internal rotor rotates to drive outer rotor to rotate, and outer rotor is differently formed bias with internal rotor rotation center；In eccentric structure makes
The different section of volume is formed in outer rotor rotary course, and the annular groove with the cooperation of not co-content is opened up on valve plate and cover board, it is complete
At pump oil process；Plate is equipped with relief valve, ensures that oil transfer pump speedy carding process diesel pressure is constant；The valve plate respectively with pump
Body, housing mating position are equipped with sealing ring four, and sealing ring is equipped in shell and cover board cooperation position；Camshaft rotates cam surface branch
Tappet body is supportted to move back and forth in pump oil component intracavitary；Plunger spring ensures that tappet body component is contacted with cam of camshaft face always
Aspiration procedure is completed with the returning quickly of plunger.
6. as described in claim 1 be used for common rail system single cylinder high pressure co-rail diesel pump group part, characterized in that fuel oil into
Oil inlet swivel nut is respectively equipped on oilhole I, threaded hole II, the bolt I, bolt II are connect with respective oil inlet swivel nut respectively.
7. being used for the single cylinder high pressure co-rail diesel pump group part of common rail system as described in claim 1, characterized in that the pump housing
It is equipped with groove in the outer end face of the pump housing and shaft-cup plate cooperation position, is equipped with sealing ring in the groove, sealing ring is sleeved on shaft-cup plate
On external cylindrical surface, realizes the sealing of the pump housing and shaft-cup plate cooperation position, prevent engine motor oil from leaking.
8. being used for the single cylinder high pressure co-rail diesel pump group part of common rail system as claimed in claim 2 or claim 3, characterized in that described
It is tightly connected by sealing ring two between fastening seat and plunger bushing, reality is tightly connected by sealing ring three between plunger bushing and the pump housing
Now seal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610739230.9A CN106121888B (en) | 2016-08-26 | 2016-08-26 | Single cylinder high pressure co-rail diesel pump group part for common rail system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610739230.9A CN106121888B (en) | 2016-08-26 | 2016-08-26 | Single cylinder high pressure co-rail diesel pump group part for common rail system |
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| CN106121888A CN106121888A (en) | 2016-11-16 |
| CN106121888B true CN106121888B (en) | 2018-07-27 |
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| CN201610739230.9A Active CN106121888B (en) | 2016-08-26 | 2016-08-26 | Single cylinder high pressure co-rail diesel pump group part for common rail system |
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Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106704171B (en) * | 2017-01-23 | 2019-10-11 | 李浩宇 | Repairing pump assembly and close circuit variable pump |
| CN106762273B (en) * | 2017-03-21 | 2022-05-20 | 北油电控燃油喷射系统(天津)有限公司 | High-pressure fuel pump lubricated by engine oil |
| CN109268180A (en) * | 2018-10-23 | 2019-01-25 | 思达耐精密机电（常熟）有限公司 | A kind of diesel electric-controlled high-pressure common rail oil feed pump |
| GB2579220B (en) * | 2018-11-26 | 2021-04-21 | Delphi Tech Ip Ltd | A pump head assembly with inlet and outlet valves movable within a common bore |
| CN109723588A (en) * | 2019-02-28 | 2019-05-07 | 北油电控燃油喷射系统(天津)有限公司 | A kind of monomer high pressure fuel pump for common rail fuel injection system |
| CN113153593B (en) * | 2021-05-10 | 2023-06-23 | 无锡威孚马山油泵油嘴有限公司 | Non-road plunger and oil valve structure comprising same |
| CN114278475B (en) * | 2022-01-07 | 2023-12-01 | 龙口龙泵柴油喷射高科有限公司 | Pump rail integrated electric control common rail high-pressure oil supply system assembly |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP3944413B2 (en) * | 2002-05-24 | 2007-07-11 | 株式会社日立製作所 | High pressure fuel supply pump |
| DE10244551A1 (en) * | 2002-09-25 | 2004-04-08 | Robert Bosch Gmbh | Fuel injection device for an internal combustion engine |
| DE102012200894A1 (en) * | 2012-01-23 | 2013-07-25 | Robert Bosch Gmbh | High-pressure fuel pump of an injection system |
| JP2014224523A (en) * | 2013-04-18 | 2014-12-04 | 株式会社デンソー | Valve device and high-pressure pump using this valve device |
| DE102013218895A1 (en) * | 2013-09-20 | 2015-03-26 | Robert Bosch Gmbh | Inlet valve for one pump and pump with inlet valve |
| CN104329198B (en) * | 2014-11-03 | 2016-08-24 | 南岳电控（衡阳）工业技术股份有限公司 | A kind of in-line arrangement co-rail fuel feed pump controlling low pressure oil-feed |
| CN206035700U (en) * | 2016-08-26 | 2017-03-22 | 龙口龙泵燃油喷射有限公司 | A single cylinder high pressure common rail firewood fuel pump assembly for rail system |
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Effective date of registration: 20181008 Address after: 265718 Shandong Longkou City high tech Industrial Park Patentee after: Longkou dragon pump diesel injection High Tech Co., Ltd. Address before: 264006 No. 1 Yanhe Road, Longkou City East Street, Yantai, Shandong Patentee before: Longkou Longbeng Fuel Injection Co., Ltd. |