CN109026479A - High-pressure oil feed pump assembly for common rail for diesel engine system - Google Patents
High-pressure oil feed pump assembly for common rail for diesel engine system Download PDFInfo
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- CN109026479A CN109026479A CN201811248539.3A CN201811248539A CN109026479A CN 109026479 A CN109026479 A CN 109026479A CN 201811248539 A CN201811248539 A CN 201811248539A CN 109026479 A CN109026479 A CN 109026479A
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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
- 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
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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
- F02M37/14—Feeding by means of driven pumps the pumps being combined with other apparatus
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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
- F02M59/12—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps having other positive-displacement pumping elements, e.g. rotary
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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
- F02M59/44—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
-
- 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
- F02M59/442—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 means preventing fuel leakage around pump plunger, e.g. fluid barriers
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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
- F02M59/44—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
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fuel-Injection Apparatus (AREA)
- Valve-Gear Or Valve Arrangements (AREA)
Abstract
The invention discloses the high-pressure oil feed pump assemblies for common rail for diesel engine system, including pump parts, the oil transportation pump part being connected with pump parts, pump oil component, pressure stabilizing valve member, fuel metering valve member, pump parts include the pump housing, drive shaft component, tappet body component, bearing block is equipped in pump parts, tappet body mounting hole, drive shaft component includes camshaft, tappet body component is mounted in the tappet body mounting hole of the pump housing, the idler wheel of tappet body component lower part is in contact with the cam on axle portion axis, oil transportation pump part is driven by camshaft, it generates negative pressure and draws diesel oil from diesel fuel tanks；Pressure stabilizing valve member and fuel metering valve Components Parallel Connection, fuel metering valve member are conveyed to pump oil component for what low pressure diesel quantified；Pump oil component pressurizes the diesel oil that fuel metering valve member measures, and then squeezes into common rail pipe；The both ends of camshaft by two bearings respectively with the bearing block on the pump housing, the bearing seat supports on axis cover plate part.
Description
Technical field
The present invention relates to diesel engine high-pressure fuel feeding pump technical field more particularly to a kind of height for common rail for diesel engine system
Press fuel feeding pump assembly.
Technical background
With the fast development of engine technology and increasingly stringent, the non-road state three, state four of emission regulation demands
Small diesel engine and the fuel injection system of automobile-used state four, five small diesel engine of state are gradually switched to Electrocontrolled high-pressure common rail
System.
The high-pressure oil feed pump assembly of the common rail for diesel engine system of the prior art has the disadvantage that 1. most of small-sized at present
The multi-cylinder high-pressure fuel feeding pump volume in common rail system that diesel engine uses is larger, supply capability is much larger than engine actual demand；
2. the injection pressure with common rail system is higher and higher, the diesel oil and machine oil intermixing in high-pressure oil pump component are more and more tighter
Weight, 3. the problems such as certain non-rice habitats small diesel engine exhaust problems, difficulty in starting.
Summary of the invention
The object of the invention is exactly to propose a kind of for common rail for diesel engine system to overcome above-mentioned disadvantage of the existing technology
The high-pressure oil feed pump assembly of system；By being provided with bearing support block in the pump housing, drive shaft component combines the present invention with pump parts
At a set of driving device；Tappet body component is mounted in the tappet body mounting hole of the pump housing, the idler wheel and drive shaft component of its underpart
On cam be in contact, the cam driven tappet body component on drive shaft component does in tappet body mounting hole and up and down reciprocatingly transports
It is dynamic；Oil transportation pump part is driven by the drive shaft component on pump parts, generates negative pressure, diesel oil is drawn from diesel fuel tanks；Pressure stabilizing
Valve member stablizes the pressure of fuel metering valve member forward end in a certain range, is convenient for fuel metering valve member adjusting oil mass,
The instruction that fuel metering valve member is issued according to ECU, by low pressure diesel that oil transportation pump part generates it is quantitative be conveyed to pump oil system
Component.Pump oil component is driven by the drive shaft component on pump parts by tappet body component, by fuel metering valve member meter
The diesel oil of amount pressurizes, and then squeezes into common rail pipe.With it is small in size, reduce diesel oil and machine oil and mutually mix, solve small-sized
The problem of diesel exhaust gas difficulty, difficulty in starting.
The technical scheme adopted by the invention to solve the technical problem is that:
A kind of high-pressure oil feed pump assembly for common rail for diesel engine system, including pump parts, and with pump parts phase
The oil transportation pump part of connection, pump oil component, pressure stabilizing valve member, fuel metering valve member, the pump parts include the pump housing, drive
Moving axis component, tappet body component, pump parts are interior to be equipped with bearing block, tappet body mounting hole, and the drive shaft component includes cam
Axis, tappet body component are mounted in the tappet body mounting hole of the pump housing, the idler wheel and the cam on axle portion axis of tappet body component lower part
It is in contact, cam driven tappet body component pumps in tappet body mounting hole；Oil transportation pump part passes through camshaft
It drives, generates negative pressure and draw diesel oil from diesel fuel tanks；Pressure stabilizing valve member and fuel metering valve Components Parallel Connection, for adjusting fuel oil meter
The pressure of valve front end is measured, the instruction that fuel metering valve member is issued according to ECU quantifies the low pressure diesel that oil transportation pump part generates
Be conveyed to pump oil component；Pump oil component is driven by camshaft by tappet body component, and fuel metering valve member is measured
Diesel oil pressurize, then squeeze into common rail pipe；The both ends of camshaft by two bearings respectively on the pump housing bearing block,
Bearing seat supports on axis cover plate part.
The pump oil component includes oil inlet valve module, pressure oil valve module, and the oil inlet valve module passes through inlet valve screw plug
It is connect with the sealing plane on plunger bushing top；
The oil inlet valve module uses conical surface seal, and valve rear end mesoporous matches to merge with spool rear end outer circle with small―gap suture leads
To, valve body front end mesoporous it was oily region, was adjusted by adjusting the depth of oil inlet valve seat to adjust the precommpression of oil inlet valve spring
Save its cracking pressure；The pressure oil valve module uses conical surface seal, and pressure oil spool therein and the pressure oil valve opening on plunger bushing are small
Clearance fit is simultaneously oriented to, and is provided with damping hole on rear side of the pressure oil seal spool conical surface, is come by adjusting the compression distance of pressure oil valve seat
The precommpression for adjusting pressure oil valve spring, to adjust the cracking pressure of pressure oil valve module.
The camshaft is equipped with gap adjusting pad；The bearing at the camshaft both ends is tapered roller bearing.
The cam is set to camshaft middle position, and cam is integrated with drive shaft, and cam is using single peach, double peaches and three peaches
Etc. a variety of patterns.
The pump housing is equipped with Double-lip framework oil sealing, the low pressure chamber and oil transportation of high-pressure oil pump component in the hole on the outside of bearing block
It is separated between the inner cavity diesel oil chamber of pump part by Double-lip framework oil sealing；
Movement parts in the low pressure chamber use machine oil forced feed lubrication, and plunger bushing inner hole lower part is equipped with radial sealing framework
Oil sealing.
The oil transportation pump part uses vane type；The oil transportation pump part and camshaft are keyed by a semicircle.
The fuel metering valve uses sleeve valve formula, and the hole of symmetrical two triangles is provided on spool.
Pressure stabilizing valve member uses phase step type overflow valve, is made of cylindrical spool and valve body, return flow oil when level-one is opened
Case, fuel oil feeds back oil pump import when second level is opened.
The front and rear end of the oil transportation pump part is equipped with exhaust apparatus, and the exhaust apparatus includes being set to oil transportation pumping section
The exhaust valve part of part front end, and the exhaust bolt set on oil transportation pump part rear end, the exhaust valve part by channel with
The filter of oil transportation pump inlet front end communicates.
The beneficial effects of the present invention are:
1. pump parts of the invention, as substrate support other component, the pump housing is provided with bearing support block, axle portion is driven
Part and pump parts are combined into a set of driving device；Tappet body component is mounted in the tappet body mounting hole of the pump housing, its underpart
Idler wheel is in contact with the cam on drive shaft component, and the cam driven tappet body component on drive shaft component is in tappet body mounting hole
Inside pump；Oil transportation pump part is driven by the drive shaft component on pump parts, negative pressure is generated, from diesel fuel tanks
Draw diesel oil；Pressure stabilizing valve member stablizes the pressure of fuel metering valve member forward end in a certain range, is convenient for fuel metering valve
Component adjusting oil mass, the instruction that fuel metering valve member is issued according to ECU, the low pressure diesel that oil transportation pump part is generated are quantitative
It is conveyed to pump oil component.Pump oil component is driven by the drive shaft component on pump parts by tappet body component, by fuel oil
The diesel oil of metering valve part metering pressurizes, and then squeezes into common rail pipe.With it is small in size, reduce diesel oil and machine oil is mutual
It is mixed, solve the problems, such as small diesel engine exhaust problem, difficulty in starting.Especially suitable for 80KW or less small diesel engine common rail system
The high-pressure oil feed pump assembly of system.
2. the oil inlet valve module uses conical surface seal, valve rear end mesoporous is matched with small―gap suture with spool rear end outer circle and is merged
Guiding, valve body front end mesoporous were oily region, and the precommpression of oil inlet valve spring is adjusted by adjusting the depth of oil inlet valve seat, from
And adjust its cracking pressure；The pressure oil valve module uses conical surface seal, the pressure oil valve on pressure oil spool therein and plunger bushing
Hole small―gap suture is provided with damping hole with merging guiding, and on rear side of the pressure oil seal spool conical surface, deep by adjusting the indentation of pressure oil valve seat
Degree is to adjust the precommpression of pressure oil valve spring, to adjust the cracking pressure of pressure oil valve module.Plunger in pump oil component
Inlet valve is opened when downlink, and pressure oil valve module is closed, and realizes oil-absorbing process；When plunger uplink in pump oil component, oil inlet
Valve is closed, and cavity pressure rises, and opens pressure oil valve module, realizes pressure oil process.Since oil inlet valve module uses conical surface seal,
Advantage is that spool plays guiding role, and energy automatic capturing guarantees sealing effect；Conical surface seal is equally used in pressure oil valve module,
Spool outer circle is oriented to by plunger bushing matching hole, guarantees conical surface seal effect.
3. being equipped with gap adjusting pad by camshaft, camshaft is adjusted in pump parts by gap adjusting pad
Axial movement value；The bearing at the camshaft both ends is tapered roller bearing.By choosing the gap adjusting pad of different-thickness, energy
It is conveniently adjusted axial gap of the camshaft in pump parts, enough to reduce the machining accuracy of other components to reduce into
This, makes being consistent property of product.
4, the cam is set to camshaft middle position, and cam is integrated with drive shaft, and cam is using single peach, double peaches and three
A variety of patterns such as peach.It is structure as a whole by using cam and drive shaft, guarantees its overall structural strength, additionally by convex peach number
Flexibly revolving speed, the fuel delivery of control high potential assembly, to adapt to the speed ratio and power of different engines.
5. the pump housing in the hole on the outside of bearing block be equipped with Double-lip framework oil sealing, the low pressure chamber of high-pressure oil pump component with it is defeated
It is separated between the inner cavity diesel oil chamber of oil pump component by Double-lip framework oil sealing；Movement parts in its low pressure chamber are strong using machine oil
System lubrication, plunger bushing inner hole lower part are equipped with radial sealing framework oil sealing.Due to being sealed using two-lip seal, can reduce
Installation space, oil sealing two sides seal be independent of each other respectively.
6. the oil transportation pump part uses vane type, guarantee that oil transfer pump is small in size, work soft, low noise, easily realizes high
Speedization, and durability against pollution chamber.
7. the fuel metering valve uses sleeve valve formula, the hole of symmetrical two triangles is provided on spool.By adopting
With the symmetrical structure of delthyrium, spool lateral force can be reduced, enhance spool in the intracorporal sliding property of valve.
8. pressure stabilizing valve member uses phase step type overflow valve, it is made of cylindrical spool and valve body, fuel oil returns when level-one is opened
Fuel tank, fuel oil feeds back oil pump import when second level is opened, and adjusts its cracking pressure by pressure stabilizing valve spring therein.Using step
The pressure of fuel metering valve front end when formula overflow valve can be improved oil pump low speed, the pressure of fuel metering valve front end when reducing high speed
Power makes the pressure level-off of fuel metering valve front end, and since phase step type overflow valve is in pressure change, flow is also to change
, pressure low discharge is low, and pressure high flow capacity is high.
9. exhaust valve part is arranged in the oil transfer pump member forward end, oil pump when first used, pass through pressing oil transportation pumping section
The air of exhaust apparatus on the filter of part front end, oil transfer pump member forward end can be discharged in diesel fuel tanks by channel and channel；
Oil transfer pump rear end exhaust bolt is also provided in high-pressure oil feed pump assembly, high-pressure oil feed pump assembly when first used, the row of unscrewing
The air of gas screw, oil transportation pump part rear end can be discharged in atmosphere by channel.Gas in oil circuit is not necessarily to by after high potential assembly
The common rail pipe at end, electric-controlled fuel injector emptying, empty directly at the oil transfer pump of high potential assembly front end, when engine plays vehicle for the first time,
Exhaust is more thoroughly convenient and efficient.
Detailed description of the invention
Attached drawing 1 is the main view section of high-pressure oil feed pump assembly of the present invention；
Attached drawing 2 is the left view section of high-pressure oil feed pump assembly of the present invention.
Specific embodiment
Technical solution in order to enable those skilled in the art to better understand the present invention, below in conjunction with of the invention real
The attached drawing in example is applied, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described implementation
Example is only a part of the embodiment of the present invention, instead of all the embodiments.
As shown in Fig.1 and Fig.2, a kind of high-pressure oil feed pump assembly for common rail for diesel engine system, including pump parts, with
And be connected with pump parts oil transportation pump part 19, pump oil component, pressure stabilizing valve member 27, fuel metering valve member 6,
In, pump parts include the pump housing 13, drive shaft component, tappet body component 9, and the pump housing is as substrate support other component, pump
Bearing block, tappet body mounting hole are equipped in body component, drive shaft component and pump parts are combined into a set of driving device；The drive
Moving axis component includes camshaft 11, and tappet body component is mounted in the tappet body mounting hole of the pump housing, the rolling of tappet body component lower part
Wheel is in contact with the cam on axle portion axis, and cam driven tappet body component pumps in tappet body mounting hole；It is defeated
Oil pump component is driven by camshaft, generates negative pressure, diesel oil is drawn from diesel fuel tanks；Pressure stabilizing valve member 27 and fuel metering valve portion
Part 6 is in parallel, and for adjusting the pressure of 6 front end of fuel metering valve, pressure stabilizing valve member is steady by the pressure of fuel metering valve member forward end
Determine in a certain range, to be convenient for fuel metering valve member adjusting oil mass；The instruction that fuel metering valve member is issued according to ECU, will
Oil transportation pump part generate low pressure diesel it is quantitative be conveyed to pump oil component；Pump oil component is by camshaft by enduring trunk portion
Part drives, and the diesel oil that fuel metering valve member measures is pressurizeed, is then squeezed into common rail pipe.The both ends of camshaft 11 pass through
Two bearings 15 with the bearing block 16 on the pump housing, the bearing seat supports on axis cover plate part 10, are equipped on camshaft 11 respectively
Gap adjusting pad 12 adjusts axial movement value of the camshaft 11 in pump parts by gap adjusting pad 12；
The pump oil component includes oil inlet valve module 2, pressure oil valve module 3, and the oil inlet valve module 2 passes through inlet valve spiral shell
Stifled 1 connect with the sealing plane on 4 top of plunger bushing.
The oil inlet valve module 2 uses conical surface seal, and valve rear end mesoporous is matched with small―gap suture with spool rear end outer circle and merged
Guiding, valve body front end mesoporous were oily region, and the precommpression of oil inlet valve spring is adjusted by adjusting the depth of oil inlet valve seat, from
And adjust its cracking pressure；The pressure oil valve module 3 uses conical surface seal, the pressure oil on pressure oil spool therein and plunger bushing 4
Valve opening small―gap suture is provided with damping hole with merging guiding, and on rear side of the pressure oil seal spool conical surface, by adjusting the indentation of pressure oil valve seat
Depth adjusts the precommpression of pressure oil valve spring, to adjust the cracking pressure of pressure oil valve module.Column in pump oil component
Inlet valve is opened when filling in downlink, and pressure oil valve module is closed, and realizes oil-absorbing process；When plunger uplink in pump oil component, into
Oil valve is closed, and cavity pressure rises, and opens pressure oil valve module, realizes pressure oil process.
4 inner hole lower part of plunger bushing prevents the diesel oil in plunger bushing from passing through plunger matching parts using radial outside framework oil seal 7
It is mutually mixed with the machine oil in high-pressure fuel-feed pump component lubrication chamber in gap.
The bearing at 11 both ends of camshaft is tapered roller bearing.
The cam is set to 11 middle position of camshaft, and cam is integrated with drive shaft, and cam is using single peach, double peaches and three
A variety of patterns such as peach.When drive shaft component rotates, cam driven tappet body component thereon is in the tappet body mounting hole of the pump housing
It pumps, to make the oil suction and pressure oil process of pump oil system completion again and again.
The pump housing is equipped with Double-lip framework oil sealing 17, the low pressure chamber 14 of high-pressure oil pump component in the hole in 16 outside of bearing block
It is separated between the inner cavity diesel oil chamber 21 of oil transportation pump part by Double-lip framework oil sealing 17.I.e. Double-lip framework oil sealing 17 is used for
Separate machine oil chamber and diesel oil chamber.
Movement parts in its described low pressure chamber use machine oil forced feed lubrication, to prevent pump oil component plunger in pressure process
For fuel oil in set 4 through the clearance leakage between plunger bushing and plunger into machine oil, plunger bushing inner hole lower part is equipped with radial
Outside framework oil seal 7.
The oil transportation pump part 19 is connect with camshaft 11 by a woodruff key 18.
The oil transportation pump part uses vane type, when oil transportation pump work, at one week within the scope of 360 °, and low pressure chamber machine at the beginning
Oil chamber volume becomes larger, and generates negative pressure, completes oil suction；Then pressure oil cavity volume gradually becomes smaller, and generates positive pressure, completes pressure oil.
Fuel metering valve uses sleeve valve formula, and the hole of symmetrical two triangles is provided on spool.
Pressure stabilizing valve member 27 uses phase step type overflow valve, is made of cylindrical spool and valve body, and fuel oil returns when level-one is opened
Fuel tank, fuel oil feeds back oil pump import when second level is opened, and adjusts its cracking pressure by pressure stabilizing valve spring therein.
The front and rear end of the oil transportation pump part is equipped with exhaust apparatus, and the exhaust apparatus includes being set to oil transportation pumping section
The exhaust valve part 28 of part front end, and the exhaust bolt 26 set on oil transportation pump part rear end, the exhaust valve part 28 pass through
Channel 29, channel 34 are communicated with the filter of oil transportation pump inlet front end.Oil pump when first used, pass through pressing oil transportation pump part
The filter of front end, the air in oil transfer pump front end diesel oil chamber 21 can open exhaust valve part along channel 34,29, return to diesel oil
Case.High-pressure oil feed pump assembly when first used, unscrew exhaust bolt 26, the air of oil transportation pump part rear end can be along pumping cavity
33, duct 20, channel 23 are discharged in atmosphere.
The specific working principle is as follows: drive shaft component rotation drives oil transfer pump rotor 30 to rotate, blade by woodruff key 18
31 under the influence of centrifugal force, and oil sucting cavity 32 is made to generate negative pressure, and under the action of negative pressure, the diesel oil in fuel tank can be by with filter
The oil inlet bolt 22 of net enters oil sucting cavity 32, completes oil-absorbing process；Blade 31 under the influence of centrifugal force, generates pumping cavity 33
Positive pressure, under the action of positive pressure, diesel oil can reach channel 20 and channel 23, i.e. fuel metering valve member by symmetrical waist type groove
6 front end, pressure stabilizing valve member 27 is in parallel with fuel metering valve member 6, for adjusting the pressure of 6 front end of fuel metering valve, makes it
It tends towards stability, is adjusted convenient for ECU.27 points of two-stages of pressure stabilizing valve member are opened, and diesel oil is reached by channel 35 when level-one is opened
Oil return bolt 25, is then return to fuel tank；It is returned at oil transfer pump oil inlet when second level is opened by channel 29 and channel 34.Diesel oil warp
After fuel metering valve member 6 measures, into the rear end channel 24 of fuel metering valve 6.Tappet body component 9 is mounted on pump parts
In tappet body mounting hole, idler wheel thereon is in contact with the cam on drive shaft component, when drive shaft component rotation, will drive
Tappet body component 9 pumps.8 lower end head of plunger is in contact with the boss in 9 upper chambers of idler wheel body component, very
Under the drive of cylinder component 9 and plunger spring 5, primary another oil suction and pressure oil process are completed.When 8 downlink of plunger, through firing
The fuel oil of certain pressure can wash oil inlet valve module 2 open after oil measurement valve 6 measures, and diesel pressure is less than pressure oil valve unlatching pressure at this time
Power, pressure oil valve module 3 are in close state, and it is intracavitary that diesel oil is drawn onto plunger bushing, complete oil-absorbing process.When 8 uplink of plunger, column
Plug sleeve cavity pressure is gradually increasing, and under the effect of the pressure, oil inlet valve module 2 is in close state, and due to initial pressure
Lower, pressure oil valve module 3 is also at closed state.As pressure continues to increase, pressure oil valve module 3 is opened, the high pressure of generation
Diesel oil is driven into common rail pipe, completes high pressure pressure oil process.In high-pressure oil feed pump assembly, it is arranged in oil transfer pump member forward end and arranges
Air valve component 28, oil pump when first used, pass through pressing oil transfer pump member forward end filter on exhaust apparatus, oil transfer pump
The air of member forward end can be discharged in diesel fuel tanks by channel 34 and channel 29.Oil transfer pump is also provided in high-pressure oil feed pump assembly
Rear end exhaust bolt 26, high-pressure oil feed pump assembly when first used, unscrew exhaust bolt 26, the air of oil transportation pump part rear end
It can be discharged in atmosphere by channel 23.
Based on the embodiments of the present invention, those of ordinary skill in the art are obtained without making creative work
The every other embodiment obtained, should fall within the scope of the present invention.
Claims (9)
1. a kind of high-pressure oil feed pump assembly for common rail for diesel engine system, characterized in that including pump parts, and and the pump housing
Oil transportation pump part that component is connected, pump oil component, pressure stabilizing valve member, fuel metering valve member, the pump parts include
The pump housing, drive shaft component, tappet body component, pump parts are interior to be equipped with bearing block, tappet body mounting hole, the drive shaft component packet
Camshaft is included, tappet body component is mounted in the tappet body mounting hole of the pump housing, on the idler wheel and axle portion axis of tappet body component lower part
Cam be in contact, cam driven tappet body component pumps in tappet body mounting hole；Oil transportation pump part passes through
Camshaft drives, and generates negative pressure and draws diesel oil from diesel fuel tanks；Pressure stabilizing valve member and fuel metering valve Components Parallel Connection, for adjusting
The pressure of fuel metering valve front end, the instruction that fuel metering valve member is issued according to ECU, the low pressure bavin that oil transportation pump part is generated
Oil is quantitative to be conveyed to pump oil component；Pump oil component is driven by camshaft by tappet body component, by fuel metering valve portion
The diesel oil of part metering pressurizes, and then squeezes into common rail pipe；The both ends of camshaft are by two bearings respectively and on the pump housing
Bearing seat supports on bearing block, axis cover plate part.
2. being used for the high-pressure oil feed pump assembly of common rail for diesel engine system as described in claim 1, characterized in that the pump oil system
Component includes oil inlet valve module, pressure oil valve module, and the oil inlet valve module passes through the sealing of inlet valve screw plug and plunger bushing top
Plane connection；
The oil inlet valve module uses conical surface seal, and valve rear end mesoporous is matched with small―gap suture with spool rear end outer circle and merges guiding,
Valve body front end mesoporous was oily region, adjusted it by adjusting the depth of oil inlet valve seat to adjust the precommpression of oil inlet valve spring
Cracking pressure；The pressure oil valve module uses conical surface seal, the pressure oil valve opening small―gap suture on pressure oil spool therein and plunger bushing
It is oriented to merging, and is provided with damping hole on rear side of the pressure oil seal spool conical surface, adjusted by adjusting the compression distance of pressure oil valve seat
The precommpression of pressure oil valve spring, to adjust the cracking pressure of pressure oil valve module.
3. being used for the high-pressure oil feed pump assembly of common rail for diesel engine system as described in claim 1, characterized in that the camshaft
It is equipped with gap adjusting pad；The bearing at the camshaft both ends is tapered roller bearing.
4. being used for the high-pressure oil feed pump assembly of common rail for diesel engine system as described in claim 1, characterized in that the cam is set
In camshaft middle position, cam is integrated with drive shaft, and cam is using a variety of patterns such as single peach, double peaches and three peaches.
5. being used for the high-pressure oil feed pump assembly of common rail for diesel engine system as described in claim 1, characterized in that the pump housing exists
Double-lip framework oil sealing, the low pressure chamber of high-pressure oil pump component and the inner cavity diesel oil chamber of oil transportation pump part are equipped in hole on the outside of bearing block
Between separated by Double-lip framework oil sealing；
Movement parts in the low pressure chamber use machine oil forced feed lubrication, and plunger bushing inner hole lower part is equipped with radial packing type skeleton oil
Envelope.
6. being used for the high-pressure oil feed pump assembly of common rail for diesel engine system as described in claim 1, characterized in that the oil transfer pump
Component uses vane type；The oil transportation pump part and camshaft are keyed by a semicircle.
7. being used for the high-pressure oil feed pump assembly of common rail for diesel engine system as described in claim 1, characterized in that the fuel oil meter
It measures valve and uses sleeve valve formula, the hole of symmetrical two triangles is provided on spool.
8. being used for the high-pressure oil feed pump assembly of common rail for diesel engine system as described in claim 1, characterized in that pressure stabilizing valve member
It using phase step type overflow valve, is made of cylindrical spool and valve body, return flow oil case when level-one is opened, fuel oil returns when second level is opened
Oil transportation pump inlet.
9. being used for the high-pressure oil feed pump assembly of common rail for diesel engine system as described in claim 1, characterized in that the oil transfer pump
The front and rear end of component is equipped with exhaust apparatus, and the exhaust apparatus includes the exhaust valve portion set on oil transfer pump member forward end
Part, and the exhaust bolt set on oil transportation pump part rear end, the exhaust valve part pass through channel and oil transportation pump inlet front end
Filter communicates.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811248539.3A CN109026479A (en) | 2018-10-25 | 2018-10-25 | High-pressure oil feed pump assembly for common rail for diesel engine system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811248539.3A CN109026479A (en) | 2018-10-25 | 2018-10-25 | High-pressure oil feed pump assembly for common rail for diesel engine system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109026479A true CN109026479A (en) | 2018-12-18 |
Family
ID=64613839
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811248539.3A Withdrawn CN109026479A (en) | 2018-10-25 | 2018-10-25 | High-pressure oil feed pump assembly for common rail for diesel engine system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109026479A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN112648120A (en) * | 2020-12-23 | 2021-04-13 | 南岳电控（衡阳）工业技术股份有限公司 | Single-cylinder common-rail oil supply pump of blade-mounted oil transfer pump |
| WO2021088324A1 (en) * | 2019-11-08 | 2021-05-14 | 重庆红江机械有限责任公司 | Multi-cylinder combined high-pressure oil pump of marine low-speed machine |
| CN113217244A (en) * | 2021-06-25 | 2021-08-06 | 龙口龙泵柴油喷射高科有限公司 | Positive pressure common rail oil supply pump assembly for light diesel engine |
| GB2594544A (en) * | 2019-11-08 | 2021-11-03 | Chongqing hongjiang machinery co ltd | Multi-cylinder combined high-pressure oil pump of marine low-speed machine |
-
2018
- 2018-10-25 CN CN201811248539.3A patent/CN109026479A/en not_active Withdrawn
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| WO2021088324A1 (en) * | 2019-11-08 | 2021-05-14 | 重庆红江机械有限责任公司 | Multi-cylinder combined high-pressure oil pump of marine low-speed machine |
| GB2594544A (en) * | 2019-11-08 | 2021-11-03 | Chongqing hongjiang machinery co ltd | Multi-cylinder combined high-pressure oil pump of marine low-speed machine |
| GB2594544B (en) * | 2019-11-08 | 2023-07-19 | Chongqing hongjiang machinery co ltd | Multi-cylinder combined high-pressure oil pump for marine low-speed engine |
| CN112648120A (en) * | 2020-12-23 | 2021-04-13 | 南岳电控（衡阳）工业技术股份有限公司 | Single-cylinder common-rail oil supply pump of blade-mounted oil transfer pump |
| CN113217244A (en) * | 2021-06-25 | 2021-08-06 | 龙口龙泵柴油喷射高科有限公司 | Positive pressure common rail oil supply pump assembly for light diesel engine |
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| PB01 | Publication | ||
| PB01 | Publication | ||
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Application publication date: 20181218 |