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 PDF

Info

Publication number
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
Authority
CN
China
Prior art keywords
oil
pump
valve
camshaft
plunger
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN201610739230.9A
Other languages
Chinese (zh)
Other versions
CN106121888A (en
Inventor
吴俐璋
郭兴
张海涛
刘本学
栾德杰
贾玉杰
蒋金喜
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Longkou dragon pump diesel injection High Tech Co., Ltd.
Original Assignee
LONGKOU LONGBENG FUEL INJECTION CO Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by LONGKOU LONGBENG FUEL INJECTION CO Ltd filed Critical LONGKOU LONGBENG FUEL INJECTION CO Ltd
Priority to CN201610739230.9A priority Critical patent/CN106121888B/en
Publication of CN106121888A publication Critical patent/CN106121888A/en
Application granted granted Critical
Publication of CN106121888B publication Critical patent/CN106121888B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02MSUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M59/00Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps
    • F02M59/02Pumps 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
    • F02M59/10Pumps 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
    • F02M59/102Mechanical drive, e.g. tappets or cams
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02MSUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M37/00Apparatus 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
    • F02M37/04Feeding by means of driven pumps
    • F02M37/045Arrangements for driving rotary positive-displacement pumps
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02MSUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M59/00Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps
    • F02M59/44Details, 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
    • F02M59/46Valves
    • F02M59/462Delivery valves
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02MSUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M59/00Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps
    • F02M59/44Details, 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
    • F02M59/46Valves
    • F02M59/464Inlet 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

Single cylinder high pressure co-rail diesel pump group part for common rail system
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.
CN201610739230.9A 2016-08-26 2016-08-26 Single cylinder high pressure co-rail diesel pump group part for common rail system Active CN106121888B (en)

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

Applications Claiming Priority (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

Publications (2)

Publication Number Publication Date
CN106121888A CN106121888A (en) 2016-11-16
CN106121888B true CN106121888B (en) 2018-07-27

Family

ID=57275444

Family Applications (1)

Application Number Title Priority Date Filing Date
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

Country Status (1)

Country Link
CN (1) CN106121888B (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
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
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

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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

Also Published As

Publication number Publication date
CN106121888A (en) 2016-11-16

Similar Documents

Publication Publication Date Title
CN106121888B (en) Single cylinder high pressure co-rail diesel pump group part for common rail system
CN206035700U (en) A single cylinder high pressure common rail firewood fuel pump assembly for rail system
CN109026479A (en) High-pressure oil feed pump assembly for common rail for diesel engine system
CN105715541A (en) Extrusion type eccentric rotary oil transfer pump, application and use method thereof
JP2008163826A (en) Fuel injection pump
CN102678541A (en) Fuel delivery pump with floated cycloid rotor
CN101655080A (en) Plunger water pump structure
CN105736378A (en) Rotary compressor good in sealing property
CN208950753U (en) High-pressure oil feed pump assembly for common rail for diesel engine system
CN110374831A (en) It is a kind of quantitative radial with oil pump
US11131242B2 (en) Turbocharger for an internal combustion engine
CN202579169U (en) Cycloidal fuel delivery pump of high-pressure common rail fuel injection system
CN105275623A (en) Variable-compression-ratio piston device
CN205503467U (en) Effectual rotary compressor of fuel feeding
CN204851606U (en) Novel diaphragm pump
CN201786649U (en) Synchronous-rotation multiphase mixture pump
CN208534658U (en) A kind of oil transfer pump of the automatically controlled injection diesel of single cylinder
CN201391437Y (en) Lubricant pump of semi-enclosed refrigerating compressor
CN203783874U (en) Radial plunger pump
CN201258837Y (en) Plunger water pump structure
CN107435629A (en) A kind of impeller pump pump case and impeller pump
CN209145856U (en) Double clutch automatic speed changing case oil pump
CN207348997U (en) Twin shaft watt supports the single plunger high-pressure oil pump of transmission shaft kinematic pair
CN209145749U (en) A kind of Electrocontrolled high-pressure common rail oil feed pump of four cylinder diameter to arrangement
CN214403932U (en) Novel high-pressure water injection pump for oil field

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant
TR01 Transfer of patent right
TR01 Transfer of patent right

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.