CN207161242U - High injection pressure injection pump - Google Patents
High injection pressure injection pump Download PDFInfo
- Publication number
- CN207161242U CN207161242U CN201721032411.4U CN201721032411U CN207161242U CN 207161242 U CN207161242 U CN 207161242U CN 201721032411 U CN201721032411 U CN 201721032411U CN 207161242 U CN207161242 U CN 207161242U
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- plunger
- pressure
- oil
- spring
- valve
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- 238000002347 injection Methods 0.000 title claims abstract description 47
- 239000007924 injection Substances 0.000 title claims abstract description 47
- 238000007789 sealing Methods 0.000 claims abstract description 21
- 230000005540 biological transmission Effects 0.000 claims abstract description 15
- 239000003921 oil Substances 0.000 claims description 62
- 238000003860 storage Methods 0.000 claims description 14
- 239000000446 fuel Substances 0.000 claims description 11
- 239000000295 fuel oil Substances 0.000 claims description 11
- 238000005260 corrosion Methods 0.000 claims description 8
- 239000010687 lubricating oil Substances 0.000 claims description 8
- 230000007797 corrosion Effects 0.000 claims description 7
- 230000033228 biological regulation Effects 0.000 claims description 4
- 230000003139 buffering effect Effects 0.000 claims description 4
- 230000007246 mechanism Effects 0.000 claims description 2
- 230000006837 decompression Effects 0.000 claims 1
- 239000004519 grease Substances 0.000 claims 1
- 239000010720 hydraulic oil Substances 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 2
- 238000004880 explosion Methods 0.000 description 2
- 238000005461 lubrication Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 206010008469 Chest discomfort Diseases 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000010727 cylinder oil Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000010761 intermediate fuel oil Substances 0.000 description 1
- 230000002427 irreversible effect Effects 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000002441 reversible effect Effects 0.000 description 1
Landscapes
- Fuel-Injection Apparatus (AREA)
Abstract
The utility model discloses a kind of high injection pressure injection pump, including the pump housing, oil outlet valve component, plunger matching parts, plunger spring, rack governor motion and transmission parts, the oil outlet valve component is arranged at the top of the pump housing by screw, transmission parts are arranged on pump housing bottom by alignment pin, plunger matching parts is fitted in pump housing mesopore, plunger matching parts includes plunger bushing and plunger, sealing ring and support ring are provided between the delivery valve seat of oil outlet valve component and the sealing surface of plunger bushing, support ring is arranged on the periphery of sealing ring, and draining breach is offered in support ring.The utility model has that pressure is high, compact-sized, high reliability.
Description
Technical field
The utility model belongs to Diesel Engine Technique Field, and in particular to a kind of high injection pressure injection pump.
Background technology
Fuel Feeding System for Diesel Engine is united has considerable influence to the performance of diesel engine.It is at full speed with electron controls technology
Development is increasingly strict with Abgasgesetz, it is desirable to which oil supply system provides higher injection pressure and injection rate, while ensures to fire
The stability of oil pressure.And high-pressure injection pump generally existing structural strength general at present is not high, it is relatively low to be applicable pressure limit, surely
The problems such as qualitative poor, it is impossible to meet the needs of diesel engine fuel oil oil supply system, therefore, need further to study.
The content of the invention
The purpose of this utility model is to provide a kind of high injection pressure injection pump, to solve above-mentioned technical problem,
It has that pressure is high, compact-sized, high reliability.Suitable for four strokes, direct injection, exhaust gas turbocharge, it is cold, no
Reversible marine diesel, it is 700~1500r/min to meet such diesel engine rated speed, and single cylinder rated power is 180
~260KW, cylinder diameter are φ 170~φ 230mm, and stroke is 270~330mm requirement.
High injection pressure injection pump described in the utility model, including the pump housing, oil outlet valve component, plunger matching parts, plunger bullet
Spring, rack governor motion and transmission parts；The oil outlet valve component is arranged at the top of the pump housing by screw, and it is fixed that transmission parts pass through
Position pin is arranged on pump housing bottom, and plunger matching parts is fitted in pump housing mesopore, and plunger matching parts includes plunger bushing and plunger, on plunger
Portion, which coordinates, to be arranged in plunger bushing, plunger upper part is provided with helix, plunger bottom passes through plunger spring, and plunger lower end passes through
Lower spring cup is connected with transmission parts；Plunger spring upper end props up upper spring seat, and its lower end is pressed on lower spring cup；Rack is adjusted
Mechanism includes gear ring and rack, and gear ring is sleeved on outside plunger bushing, and rack cooperates with gear ring, passes through the spiral shell on pilot plunger top
Spin line is to adjust fuel delivery；Sealing ring and support are provided between the delivery valve seat of oil outlet valve component and the sealing surface of plunger bushing
Ring, support ring are arranged on the periphery of sealing ring, and draining breach is offered in support ring.
Further, lift limiter, oil outlet valve spring are sequentially installed with the mesopore of the delivery valve seat from top to bottom, is gone out
Fuel tap, pressure-reducing valve and pressure-relief valve spring；Delivery valve is valve arrangement in valve with pressure-reducing valve, and oil outlet valve spring is fitted in lift limiter
Between delivery valve；Pressure-relief valve spring is fitted in the mesopore of plunger bushing, and its upper end is resisted against on pressure-reducing valve.
Further, it is all provided between the oil outlet valve spring and lift limiter and between pressure-relief valve spring and pressure-reducing valve
Pressure regulation pad is equipped with, to adjust the Opening pressure of delivery valve and pressure-reducing valve respectively.
Further, the outer plunger surface offers the second oil storage annular groove；The mesopore inwall of the plunger bushing offer to
Few twice the first oil storage annular groove, the first oil storage annular groove and the lubricating oil oil-feed oil duct on plunger bushing positioned at plunger bushing top connect
Logical, the first oil storage annular groove positioned at plunger bushing bottom connects with the leakage lubricating oil duct on plunger bushing.
Further, corrosion protection screw is installed, the corrosion protection screw head is concave spherical surface structure on the pump housing；The plunger bushing
On low-voltage fuel oil-feed oil duct and the inner orifice of low-voltage fuel oil return oil duct offer anti-cavitation pitting breach；The plunger upper part
Helix be bifilar helix, and offer anti-cavitation pitting groove in plunger upper part.
Further, the gear teeth of the rack are provided at both ends with positive stop lug boss, and the height of the positive stop lug boss is more than the tooth of the gear teeth
Heights of roofs, and buffering breach is provided between positive stop lug boss and the gear teeth.
Further, the transmission parts include flange seat and coordinate the tappet being arranged in flange seat mesopore, tappet upper end
It is connected by lower spring cup with plunger lower end, and elastic spring is provided between tappet and lower spring cup, makes tappet upper end and post
Plug has gap between lower end.
Further, the mesopore of the flange seat is up big and down small stepped hole, and the tappet coordinates installed in stepped hole
In small diameter bore, leakage fuel oil outage is offered in the large diameter hole bottom of stepped hole.
Further, arrow-shaped oil leab is offered in the tappet.
Beneficial effect caused by the utility model：
1st, by setting sealing ring and support ring between delivery valve seat and the sealing surface of plunger bushing, the two forms sealing ring
Band, the area of sealing surface between delivery valve seat and plunger bushing is reduced, improve the sealing of injection pump, while in support ring
Draining breach can prevent injection pump from the explosion type leakage induced after slight fuel leakage occur, improve the reliable of injection pump
Property.
2nd, the corrosion protection screw head on the pump housing is designed as concave spherical surface structure, is double spiral shells by the helical design of plunger upper part
Spin line, and open up anti-cavitation pitting groove, while the low-voltage fuel oil-feed oil duct on plunger bushing and low-voltage fuel oil return in plunger upper part
The inner orifice of oil duct opens up anti-cavitation pitting breach, it is above-mentioned when being designed to effectively weaken oil spout pump operation to the cave of plunger upper part
Erosion, improve the service life of injection pump.
3rd, positive stop lug boss is provided at both ends with by the gear teeth in rack, the range and minimum stroke of rack is limited
It is fixed, meanwhile, in order to prevent rack from parital vacuum occur in range or minimum stroke, set between positive stop lug boss and the gear teeth
Buffering breach is equipped with, also improves the reliability of injection pump.
Brief description of the drawings
Fig. 1 is axonometric drawing of the present utility model；
Fig. 2 is structural representation of the present utility model；
Fig. 3 is the structural representation of oil outlet valve component and plunger matching parts in the utility model；
Fig. 4 is the internal structure cut-away view of plunger bushing；
Fig. 5 is sealing ring and support ring and the assembling schematic diagram of plunger bushing；
Fig. 6 is the structural representation of rack governor motion；
In figure：1-delivery valve seat, 2-plunger bushing, 3-corrosion protection screw, 4-plunger, 5-pump housing, 6-gear ring, 7-on
Spring base, 8-plunger spring, 9-elastic spring, 10-tappet, 11-flange seat, 12-lower spring cup, 13-rack,
14-lift limiter, 15-oil outlet valve spring, 16-delivery valve, 17-pressure-reducing valve, 18-pressure-relief valve spring, 19-pressure regulation pad
Piece, 20-sealing ring, 21-support ring；201-leakage lubricating oil duct, 202-lubricating oil oil-feed oil duct, 203-the first storages
Oil ring groove；401-anti-cavitation pitting breach, 402-anti-cavitation pitting groove, 403-bifilar helix, 404-the second oil storage annular grooves； 1001―
Oil leab, 1101-leakage fuel oil outage；1301-positive stop lug boss, 1302-buffering breach；2101-draining breach.
Embodiment
The utility model will be further described below in conjunction with the accompanying drawings.
Referring to the high injection pressure injection pump shown in Fig. 1 to Fig. 6, suitable for four strokes, direct injection, exhaust gas turbocharge,
In cold, irreversible marine diesel, meet that such diesel engine rated speed is 700~1500r/min, single cylinder rated power
For 180~260KW, cylinder diameter is φ 170~φ 230mm, and stroke is 270~330mm requirement.The injection pump includes the pump housing 5, gone out
Oil valve assembly, plunger matching parts, plunger spring 8, rack governor motion and transmission parts.
The oil outlet valve component is arranged on the top of the pump housing 5 by screw, and plunger matching parts is fitted in the mesopore of the pump housing 5, gone out
Oil valve assembly includes delivery valve seat 1, the lift limiter 14, fuel-displaced being sequentially arranged at from top to bottom in the mesopore of delivery valve seat 1
Valve spring 15, delivery valve 16, pressure-reducing valve 17 and pressure-relief valve spring 18；Delivery valve 16 is valve arrangement in valve with pressure-reducing valve 17, fuel-displaced
Valve spring 15 is fitted between lift limiter 14 and delivery valve 16；Pressure-relief valve spring 18 is fitted in the mesopore of plunger bushing 2, its
Upper end is resisted against on pressure-reducing valve 17.Meanwhile in order to adjust the Opening pressure of delivery valve 16 and pressure-reducing valve 17.The oil outlet valve spring
Pressure regulation pad 19 is provided between 15 and lift limiter 14 and between pressure-relief valve spring 18 and pressure-reducing valve 17.
The plunger matching parts includes plunger bushing 2 and plunger 4, and the top of plunger 4, which coordinates, to be arranged in plunger bushing 2, on plunger 4
Portion is provided with helix, and the bottom of plunger 4 passes through plunger spring 8, and the lower end of plunger 4 is connected by lower spring cup 12 with transmission parts；
The upper end of plunger spring 8 props up upper spring seat 7, and its lower end is pressed on lower spring cup 12.
The transmission parts are arranged on the bottom of the pump housing 5 by alignment pin, and transmission parts include flange seat 11 and coordinated to install
Tappet 10 in the mesopore of flange seat 11, the mesopore of flange seat 11 is up big and down small stepped hole, and tappet 10, which coordinates, is arranged on platform
In the small diameter bore in rank hole, the upper end of tappet 10 is connected by lower spring cup 12 with the lower end of plunger 4, tappet 10 and lower spring cup
Elastic spring 9 is provided between 12, makes that there is gap between the upper end of tappet 10 and the lower end of plunger 4, it is ensured that tappet 10 passes to plunger 4
Plunger 4 can be rotated independently when passing cam action forces.And arrow-shaped oil leab 1001 is offered in tappet 10, to tappet 10
Carry out effectively lubricating.Leakage fuel oil outage 1101 is offered in the large diameter hole bottom of stepped hole, to will leak out in the pump housing 5
Interior fuel oil is discharged out of the pump housing 5 in time, prevents fuel oil from passing through the clearance leakage between flange seat 11 and tappet 10 to cam box
It is interior, pollute the lubricating oil in cam box.
The rack governor motion includes gear ring 6 and rack 13, and gear ring 6 is sleeved on outside plunger bushing 2, rack 13 and gear ring 6
Cooperate, by the helix on the top of pilot plunger 4 to adjust fuel delivery.And it is provided at both ends with limit in the gear teeth of rack 13
Position boss 1301, the height of the positive stop lug boss 1301 is more than the outside pitch line length of the gear teeth, to the range and minimum row of rack 13
Journey is defined, meanwhile, in order to prevent rack 13 from parital vacuum occur in range or minimum stroke, in positive stop lug boss
Buffering breach 1302 is provided between 1301 and the gear teeth.
In the present embodiment, sealing ring 20 is provided between the delivery valve seat 1 of oil outlet valve component and the sealing surface of plunger bushing 2
With support ring 21, the support ring 21 is arranged on the periphery of sealing ring 20, and the two forms seal band, reduces delivery valve seat 1
The sealing surface area between plunger bushing 2, improve the sealing of injection pump.Draining breach is offered in support ring 21 simultaneously
2101, it can prevent injection pump from the explosion type leakage induced after slight fuel leakage occur.
And in the present embodiment, in order to ensure that motion process intermediate fuel oil can be by the gap between plunger 4 and plunger bushing 2
Sufficient lubrication plunger matching parts, the outer surface of plunger 4 offer the second oil storage annular groove 404；The mesopore inwall of the plunger bushing 2 is opened
Provided with least the first oil storage of twice annular groove 203, the first oil storage annular groove 203 and the lubrication on plunger bushing 2 positioned at the top of plunger bushing 2
Oily oil-feed oil duct 202 connects, the first oil storage annular groove 203 and the leakage lubricating oil duct on plunger bushing 2 positioned at the bottom of plunger bushing 2
201 connections.
And in the present embodiment, corrosion protection screw 3 being installed on the pump housing 5, the head of corrosion protection screw 3 is concave spherical surface knot
Structure；The inner orifice of low-voltage fuel oil-feed oil duct and low-voltage fuel oil return oil duct (not shown) on the plunger bushing 2 is opened
Provided with anti-cavitation pitting breach 401；The helix on the top of plunger 4 is bifilar helix 403, and offers anti-cave on the top of plunger 4
Groove 402 is lost, to the cavitation pitting on the top of plunger 4 when said structure can effectively weaken oil spout pump operation, improves the use of injection pump
Life-span.
The injection pump is in delivery stroke, the rise of oil pressure in pump chamber, more than delivery valve 16 Opening pressure when, delivery valve
16 overcome the spring force of oil outlet valve spring 15 and lift, and the hydraulic oil in pump chamber is pressed into high-pressure oil pipe by high-pressure oil duct.For
After oil terminates, pump chamber is changed into low pressure chamber, and the hydraulic oil in high-pressure oil pipe reversely flows into low pressure chamber through high-pressure oil duct, when hydraulic oil is low
After a certain setting numerical value, delivery valve 16 is closed.If oil pressure in high pressure chest is because pressure wave transmission is with being superimposed sum higher than subtracting
During 17 Opening pressure of pressure valve, then pressure-reducing valve 17 overcomes the thrust of pressure-relief valve spring 18 and lifted, and hydraulic oil enters low pressure chamber, high
Oil pressure in force feed road obtains pressure release, each cylinder oil pressure balance.
Embodiment described above is only that preferred embodiment of the present utility model is described, not to this practicality
New scope is defined, and on the premise of the utility model design marrow is not departed from, those of ordinary skill in the art are to this
The various modifications and improvement that the technical scheme of utility model is made, the guarantor that claims of the present utility model determine all should be fallen into
In the range of shield.
Claims (9)
1. a kind of high injection pressure injection pump, including the pump housing (5), oil outlet valve component, plunger matching parts, plunger spring (8), rack are adjusted
Save mechanism and transmission parts；The oil outlet valve component is arranged at the top of the pump housing by screw, and transmission parts are installed by alignment pin
In pump housing bottom, plunger matching parts is fitted in pump housing mesopore, plunger matching parts includes plunger bushing (2) and plunger (4), plunger upper part
Coordinate and be arranged in plunger bushing, plunger upper part is provided with helix, plunger bottom passes through plunger spring, and plunger lower end is under
Spring base (12) is connected with transmission parts；Plunger spring upper end props up upper spring seat (7), and its lower end is pressed on lower spring cup；Tooth
Bar governor motion includes gear ring (6) and rack (13), and gear ring is sleeved on outside plunger bushing, and rack cooperates with gear ring, passes through tune
The helix of plunger upper part is saved to adjust fuel delivery；It is characterized in that：In the delivery valve seat (1) and plunger bushing of oil outlet valve component
Sealing ring (20) and support ring (21) are provided between sealing surface, support ring is arranged on the periphery of sealing ring, and in support ring
Offer draining breach (2101).
2. high injection pressure injection pump according to claim 1, it is characterised in that：From upper in the mesopore of the delivery valve seat
Lift limiter (14), oil outlet valve spring (15), delivery valve (16), pressure-reducing valve (17) and pressure-relief valve spring are sequentially installed with
(18)；Delivery valve is valve arrangement in valve with pressure-reducing valve, and oil outlet valve spring is fitted between lift limiter and delivery valve；Pressure-reducing valve
In the mesopore of plunger bushing, its upper end is resisted against on pressure-reducing valve pressure mounting of the spring.
3. high injection pressure injection pump according to claim 2, it is characterised in that：The oil outlet valve spring and lift limit
Pressure regulation pad (19) is provided between device and between pressure-relief valve spring and pressure-reducing valve, to adjust delivery valve and decompression respectively
The Opening pressure of valve.
4. high injection pressure injection pump according to claim 1, it is characterised in that：The outer plunger surface offers second
Oil storage annular groove (404)；The mesopore inwall of the plunger bushing offers at least the first oil storage of twice annular groove (203), positioned at plunger bushing
The first oil storage annular groove on top connects with the lubricating oil oil-feed oil duct (202) on plunger bushing, the first storage positioned at plunger bushing bottom
Oil ring groove connects with the leakage lubricating oil duct (201) on plunger bushing.
5. high injection pressure injection pump according to claim 1, it is characterised in that：Corrosion protection screw is installed on the pump housing
(3), the corrosion protection screw head is concave spherical surface structure；Low-voltage fuel oil-feed oil duct and low-voltage fuel oil return oil duct on the pump housing
Inner orifice offer anti-cavitation pitting breach (401)；The helix of the plunger upper part is bifilar helix, and is opened in plunger upper part
Provided with anti-cavitation pitting groove (402).
6. high injection pressure injection pump according to claim 1, it is characterised in that：The gear teeth of the rack are provided at both ends with
Positive stop lug boss (1301), the height of the positive stop lug boss is more than the outside pitch line length of the gear teeth, and is set between positive stop lug boss and the gear teeth
There is buffering breach (1302).
7. high injection pressure injection pump according to claim 1, it is characterised in that：The transmission parts include flange seat
(11) and the tappet (10) being arranged in flange seat mesopore is coordinated, tappet upper end is connected by lower spring cup with plunger lower end, and
Elastic spring (9) is provided between tappet and lower spring cup, makes that there is gap between tappet upper end and plunger lower end.
8. high injection pressure injection pump according to claim 7, it is characterised in that：The mesopore of the flange seat for it is upper it is big under
Small stepped hole, the tappet coordinate in the small diameter bore of stepped hole, offered in the large diameter hole bottom of stepped hole
Leak fuel oil outage (1101).
9. high injection pressure injection pump according to claim 7, it is characterised in that：Arrow-shaped profit is offered in the tappet
Grease way (1001).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721032411.4U CN207161242U (en) | 2017-08-17 | 2017-08-17 | High injection pressure injection pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721032411.4U CN207161242U (en) | 2017-08-17 | 2017-08-17 | High injection pressure injection pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207161242U true CN207161242U (en) | 2018-03-30 |
Family
ID=61717817
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721032411.4U Active CN207161242U (en) | 2017-08-17 | 2017-08-17 | High injection pressure injection pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207161242U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111472915A (en) * | 2020-05-28 | 2020-07-31 | 重庆红江机械有限责任公司 | Roller pin assembly, guide piston and fuel injection pump |
| CN115977844A (en) * | 2023-01-06 | 2023-04-18 | 重庆潍柴发动机有限公司 | A fuel injection pump plunger and fuel injection pump |
-
2017
- 2017-08-17 CN CN201721032411.4U patent/CN207161242U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111472915A (en) * | 2020-05-28 | 2020-07-31 | 重庆红江机械有限责任公司 | Roller pin assembly, guide piston and fuel injection pump |
| CN111472915B (en) * | 2020-05-28 | 2025-03-25 | 重庆红江机械有限责任公司 | Roller pin assembly, guide piston and fuel injection pump |
| CN115977844A (en) * | 2023-01-06 | 2023-04-18 | 重庆潍柴发动机有限公司 | A fuel injection pump plunger and fuel injection pump |
| CN115977844B (en) * | 2023-01-06 | 2025-09-19 | 重庆潍柴发动机有限公司 | Injection pump plunger and injection pump |
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