CN101865062A - Constant pressure oil outlet valve - Google Patents
Constant pressure oil outlet valve Download PDFInfo
- Publication number
- CN101865062A CN101865062A CN 201010192139 CN201010192139A CN101865062A CN 101865062 A CN101865062 A CN 101865062A CN 201010192139 CN201010192139 CN 201010192139 CN 201010192139 A CN201010192139 A CN 201010192139A CN 101865062 A CN101865062 A CN 101865062A
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- China
- Prior art keywords
- outlet valve
- oil outlet
- fuel
- delivery valve
- seat
- 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.)
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- 239000003921 oil Substances 0.000 claims abstract description 55
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 18
- 239000010959 steel Substances 0.000 claims abstract description 18
- 239000000295 fuel oil Substances 0.000 claims abstract description 13
- 230000009191 jumping Effects 0.000 claims abstract description 3
- 210000003746 feather Anatomy 0.000 claims description 15
- 238000002347 injection Methods 0.000 abstract description 20
- 239000007924 injection Substances 0.000 abstract description 20
- 238000005516 engineering process Methods 0.000 abstract description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 238000000034 method Methods 0.000 abstract description 2
- 230000003628 erosive effect Effects 0.000 abstract 1
- 230000002349 favourable effect Effects 0.000 abstract 1
- 239000000446 fuel Substances 0.000 description 16
- 238000005336 cracking Methods 0.000 description 5
- 238000007599 discharging Methods 0.000 description 5
- 238000007789 sealing Methods 0.000 description 5
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000000945 filler Substances 0.000 description 2
- 238000012797 qualification Methods 0.000 description 2
- 238000000354 decomposition reaction Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 239000002283 diesel fuel Substances 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000010761 intermediate fuel oil Substances 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000007634 remodeling Methods 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
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- Fuel-Injection Apparatus (AREA)
Abstract
The invention relates to the manufacturing technology of a single cylinder high speed diesel engine with a small cylinder diameter, in particular to a constant pressure oil outlet valve suitable for a diesel engine fuel oil system. The constant pressure oil outlet valve comprises an oil outlet valve tightening seat, an oil outlet valve spring, an oil outlet valve core, an oil outlet valve seat, a steel ball, a spring seat and a pressure relief valve spring, wherein the oil outlet valve spring, the oil outlet valve core and the oil outlet valve seat are mounted in the oil outlet valve tightening seat, the steel ball, the spring seat and the pressure relief valve spring are sequentially assembled in the oil outlet valve tightening seat, the oil outlet valve tightening seat is provided with a lift-range limiting cavity capable of controlling the lift-range of the oil outlet valve, the oil outlet valve core and the oil outlet valve seat are tangentially matched to form a one-way oil supply valve, the oil outlet valve core and the steel ball are tangentially matched to form a constant pressure relief valve, and the lift-range limiting cavity can influence the throttle flow and the initial pressure of the fuel oil in the oil outlet valve through controlling the jumping height of the oil outlet valve core. The constant pressure oil outlet valve has the functions of limiting the lift-range and relieving pressure, can eliminate the secondary injection, the unstable injection generated easily due to low speed and the cavitation erosion easily occurring to a high pressure chamber, and the like, and has the characteristics of simple structure, skillful process, favorable performance, low fuel oil consumption rate, low discharge, stable injection, an the like.
Description
Technical field
The present invention relates to a kind of engineering goods, particularly relate to the little cylinder diameter high-speed diesel engine of single cylinder manufacturing technology, specifically a kind of constant pressure delivery valve that is applicable to diesel fuel system.
Background technique
Related single cylinder high-speed diesel engine Injection Pump delivery valve matching parts in the prior art, its structure comprises delivery valve holder, oil outlet valve spring, fuel-displaced spool, delivery valve seat; It is applicable to the little cylinder diameter high-speed diesel engine of single cylinder, along with development of diesel, strengthen and strictness restriction discharging, require oil supply system that higher jet pressure and injection rate is provided, appearance outlet valve such as traditional easily produces unstable spray and hyperbaric chamber easily produces cavitation pitting etc. owing to easily produce secondary injection, low speed during high speed, is difficult to adapt to the needs of present diesel engine.Chinese patent for example, patent No. 200520125027.x discloses a kind of constant pressure delivery valve that is used for diesel injection pump, comprise and being bonded with each other or the may command oil circuit disconnects, is communicated with when being disengaged fuel-displaced valve body, and delivery valve seat, one end is connected with Injection Pump, the delivery valve holder that one end is connected with high-pressure oil pipe is installed on the container that subtracts of delivery valve holder inner chamber, subtracts the oil outlet valve spring between container and the fuel-displaced valve body.Its fuel-displaced valve body, delivery valve seat, oil outlet valve spring and subtract container and form first one-way valve is arranged, at fuel-displaced valve body internal cavities second one-way valve reverse with first one-way valve is installed, this outlet valve utilizes the variation control fuel pressure that container is realized the outlet valve internal capacity that subtracts that install at the top in its inner chamber, it also can prevent the bad injection of oil sprayer, it is regular to improve fuel oil, but its complex structure, the sensitivity of parts coordination is not high, and can not control the throttling at outlet valve flow area place and the initial pressure of fuel oil effectively, therefore also undesirable and perfect.
Summary of the invention
Technical problem to be solved by this invention is at above-mentioned prior art present situation, and a kind of constant pressure delivery valve is provided, its structure novelty of signing an undertaking, characteristics such as performance is good, fuel consumption rate is low, discharging is low, jetting stability.
The present invention solves the problems of the technologies described above the technological scheme that is adopted: constant pressure delivery valve, comprise delivery valve holder and the oil outlet valve spring that is installed in wherein, fuel-displaced spool, and delivery valve seat and be assemblied in wherein steel ball successively, spring seat, the pressure-relief valve spring, described delivery valve holder is shaped on the lift restricted room that can control fuel-displaced spool lift, fuel-displaced spool is formed oil feed non-return valve with tangent cooperation of delivery valve seat, described fuel-displaced spool is formed isobaric feather valve with tangent cooperation of steel ball, and described lift restricted room can influence the throttling and the initial pressure of fuel oil in the outlet valve by the height of jumping of the fuel-displaced spool of control.
The technical measures of being taked also comprise:
Above-mentioned fuel-displaced spool is the hollow cylinder that is shaped on protruding rafter important actor, and the center of described protruding rafter important actor is shaped on cone-shaped groove, and described groove has the emptying throttle orifice, and above-mentioned isobaric feather valve is made up of groove and tangent being sealed and matched of steel ball.
Above-mentioned protruding rafter important actor is shaped on the cylindrical spherical surface, and correspondingly delivery valve seat is shaped on the interior spheroidal surface of matching with it, and described oil feed non-return valve is made up of tangent being sealed and matched of cylindrical spherical surface and interior spheroidal surface.
Stretch into to above-mentioned delivery valve seat interference fit assembling connection in the delivery valve holder.
Cover is equipped with gasket seal on the above-mentioned delivery valve seat.
Compared with prior art, constant pressure delivery valve of the present invention is equipped with lift restriction and pressure relief, increasing the lift restriction can significantly influence the pressure of plunger cavity and fuel-displaced valve pocket, have influence on the throttling at outlet valve flow area place and the initial pressure of fuel oil, can determine jet velocity and injection duration and fuel delivery per cycle to a great extent; Increase pressure relief and just can control setting, can avoid high-pressure oil pipe pressure wave when high speed too to strengthen the pressure in the high-pressure oil pipe.Thereby eliminate the secondary injection and the uneven injection of diesel engine, prevent that cavitation pitting from taking place, and have advantage rational in infrastructure, novel in design, that performance is good, fuel consumption rate is low.
Description of drawings
Fig. 1 is the structural representation of the embodiment of the invention;
Fig. 2 is a three-dimensional assembling decomposition texture schematic representation of the present invention;
Fig. 3 is the perspective view of Fig. 1;
Fig. 4 is the local structure for amplifying schematic representation of Fig. 1.
Embodiment
Below in conjunction with the accompanying drawing embodiment the present invention is described in further detail.
Fig. 1 to Fig. 4 is a structural representation of the present invention.
Reference character wherein is: delivery valve holder 1, lift restricted room 1a, oil outlet valve spring 2, fuel-displaced spool 3, cylindrical spherical surface 3a, filler opening 3b, emptying throttle orifice 3d, protruding rafter important actor 31, groove 32, steel ball 4, spring seat 5, pressure-relief valve spring 6, gasket seal 7, delivery valve seat 8, interior spheroidal surface 8a.
As shown in Figures 1 to 4, constant pressure delivery valve of the present invention, comprise delivery valve holder 1 and the oil outlet valve spring 2, the fuel-displaced spool 3 that are installed in the tight seat 1 of fuel tap, and delivery valve seat 8 and be assemblied in steel ball 4, spring seat 5, pressure-relief valve spring 6 in the delivery valve seat 8 successively, described delivery valve holder 1 is shaped on the lift restricted room 1a that can control fuel-displaced spool 3 lifts, described fuel-displaced spool 3 is formed oil feed non-return valve with 8 tangent cooperations of delivery valve seat, and described fuel-displaced spool 3 is formed isobaric feather valve with 4 tangent cooperations of steel ball.Lift restricted room 1a has limited the open gap that fuel-displaced spool 3 makes progress, and has influence on the throttling at outlet valve flow area place and the initial pressure of fuel oil.When making the pressure in the high-pressure oil pipe equal cracking pressure value that isobaric feather valve sets, opens by isobaric feather valve, make the high-pressure oil pipe intermediate fuel oil flow back to plunger cavity, when dropping to the pressure of qualification, the oil pressure up to outlet valve top closes, if secondary is arranged, when three pressure waves are higher than the cracking pressure of isobaric feather valve, then isobaric feather valve can be opened once more, eliminate the further reflection of pressure wave, avoid high-pressure oil pipe pressure wave when high speed too to strengthen.Thereby can eliminate the secondary injection and the uneven injection of diesel engine, and can not form cavity, can prevent to form cavitation pitting, help reducing fuel consumption rate, improve power, reduce discharging.
As Fig. 1, shown in Figure 4, fuel-displaced spool 3 is for being shaped on the hollow cylinder of protruding rafter important actor 31, and the center of protruding rafter important actor 31 is shaped on cone-shaped groove 32, and groove 32 has emptying throttle orifice 3d, and isobaric feather valve is made up of groove 32 and steel ball 4 tangent being sealed and matched.The lower end head excircle of protruding rafter important actor 31 is shaped on cylindrical spherical surface 3a, and correspondingly delivery valve seat 8 is shaped on the interior spheroidal surface 8a that matches with it, and oil feed non-return valve is made up of cylindrical spherical surface 3a and tangent being sealed and matched of interior spheroidal surface 8a.
Constant pressure delivery valve of the present invention, its delivery valve seat 8 stretch into cover and fit in the delivery valve holder 1, and cover is equipped with gasket seal 7 on the delivery valve seat 8, and delivery valve seat 8 adopts interference fit with delivery valve holder 1.
Constant pressure delivery valve of the present invention is to implement like this:
Shown in perspective exploded view of the present invention among Fig. 2, oil outlet valve spring 2, fuel-displaced spool 3, steel ball 4, spring seat 5, pressure-relief valve spring 6, gasket seal 7, delivery valve seat 8 connect in the delivery valve holder 1 of packing into successively, delivery valve seat 8 and delivery valve holder 1 interference fit; And use special tool and equipment that its fuel feeding sealing, release sealing, release cracking pressure are debugged and detected, finish assembling after qualified.
Working principle is that the tangent sealing of interior spheroidal surface 8a of cylindrical spherical surface 3a and delivery valve seat 8 forms the plunger cavity oil feed non-return valve on the protruding rafter important actor 31 of fuel-displaced spool 3, when the high pressure oil pump fuel feeding, hydraulic fluid pressure acts on the protruding rafter important actor 31, because steel ball 4 cuts out at the thrust lower seal of oil pressure with cone-shaped groove 32, it is up that high pressure fuel promotes fuel-displaced spool 3 compression oil outlet valve springs 2, the interior spheroidal of cylindrical spherical surface 3a and delivery valve seat 8 surface 8a breaks away from mutually on the protruding rafter important actor 31, and fuel oil is by the gap of fuel-displaced spool 3 external peripheral surfaces and the delivery valve holder 1 inwall oil outlet valve spring 2 of flowing through, the filler opening 3b of fuel-displaced spool 3 and high-pressure oil pipe UNICOM realize fuel feeding.Fuel-displaced spool 3 is up to takeoff to contact with the top of the lift restricted room 1a of delivery valve holder 1 and forms the rise limitation effect, can significantly influence the pressure of plunger cavity and fuel-displaced valve pocket, have influence on the throttling at outlet valve flow area place and the initial pressure of fuel oil, determined the speed of injection and the endurance and the fuel delivery per cycle of injection to a great extent.When fuel cut-off, fuel-displaced spool 3 resets under the effect of oil outlet valve spring 2, and the tangent sealing of interior spheroidal surface 8a that makes cylindrical spherical surface 3a and delivery valve seat 8 on the protruding rafter important actor 31 then oil feed non-return valve is closed.Steel ball 4 forms isobaric feather valve with the cone-shaped groove 32 tangent sealings of the protruding rafter important actor 31 of fuel-displaced spool 3, pressure in high-pressure oil pipe equals the cracking pressure of isobaric feather valve, then fuel oil is pushed steel ball 4 by the emptying throttle orifice 3d unlatching that groove 32 has open to lower compression, steel ball 4 and cone-shaped groove 32 are broken away from, fuel oil flows back to plunger cavity, reduces to the pressure of isobaric feather valve qualification up to the oil pressure on outlet valve top and just closes.If secondary is arranged, when three pressure waves are higher than the cracking pressure of isobaric feather valve, then isobaric feather valve is opened once more, eliminate the further reflection of pressure wave, like this under various operating modes, residual pressure after each fuel feeding finishes can both realize automatic adjusting, avoids high-pressure oil pipe pressure wave when high speed too to strengthen.Thereby eliminate the secondary injection and the uneven injection of diesel engine, can not form cavity, also effective to preventing cavitation pitting.Help reducing fuel consumption rate, improve power, reduce discharging.
Compared with prior art, constant pressure delivery valve of the present invention has novelty simple in structure, the characteristics that performance is good, fuel consumption rate is low, discharging is low, simultaneously can control the pressure that influences plunger cavity and fuel-displaced valve pocket, eliminate the secondary injection and the uneven injection of diesel engine, the advantages such as fuel delivery that can under fixing operating mode, keep relative stability.
Most preferred embodiment of the present invention is illustrated, and various variations or the remodeling made by those of ordinary skills can not depart from the scope of the present invention.
Claims (5)
1. constant pressure delivery valve, comprise delivery valve holder (1) and be installed in wherein oil outlet valve spring (2), fuel-displaced spool (3), and delivery valve seat (8) and be assemblied in wherein steel ball (4) successively, spring seat (5), pressure-relief valve spring (6), it is characterized in that: described delivery valve holder (1) is shaped on the lift restricted room (1a) that can control fuel-displaced spool (3) lift, described fuel-displaced spool (3) is formed oil feed non-return valve with tangent cooperation of delivery valve seat (8), described fuel-displaced spool (3) is formed isobaric feather valve with tangent cooperation of steel ball (4), and described lift restricted room (1a) can influence the throttling and the initial pressure of fuel oil in the outlet valve by the height of jumping of the fuel-displaced spool of control (3).
2. constant pressure delivery valve according to claim 1, it is characterized in that: described fuel-displaced spool (3) is for being shaped on the hollow cylinder of protruding rafter important actor (31), the center of described protruding rafter important actor (31) is shaped on cone-shaped groove (32), described groove (32) has emptying throttle orifice (3d), and described isobaric feather valve is made up of groove (32) and tangent being sealed and matched of steel ball (4).
3. constant pressure delivery valve according to claim 2, it is characterized in that: described protruding rafter important actor (31) is shaped on cylindrical spherical surface (3a), correspondingly delivery valve seat (8) is shaped on the interior spheroidal surface (8a) of matching with it, and described oil feed non-return valve is made up of cylindrical spherical surface (3a) and tangent being sealed and matched in interior spheroidal surface (8a).
4. according to the described constant pressure delivery valve of the arbitrary claim of claim 1 to 3, it is characterized in that: stretch into to described delivery valve seat (8) interference fit assembling connection in the delivery valve holder (1).
5. constant pressure delivery valve according to claim 4 is characterized in that: described delivery valve seat (8) is gone up cover and is equipped with gasket seal (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010192139 CN101865062A (en) | 2010-06-03 | 2010-06-03 | Constant pressure oil outlet valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010192139 CN101865062A (en) | 2010-06-03 | 2010-06-03 | Constant pressure oil outlet valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101865062A true CN101865062A (en) | 2010-10-20 |
Family
ID=42956941
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201010192139 Pending CN101865062A (en) | 2010-06-03 | 2010-06-03 | Constant pressure oil outlet valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101865062A (en) |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103061936A (en) * | 2013-01-10 | 2013-04-24 | 无锡开普机械有限公司 | Oil inlet and outlet valve of common-rail pump |
| CN103437930A (en) * | 2013-08-13 | 2013-12-11 | 南京威孚金宁有限公司 | Control method of isobaric valve performance |
| CN103470417A (en) * | 2013-09-27 | 2013-12-25 | 无锡威孚高科技集团股份有限公司 | Isobaric oil outlet valve |
| CN107532555A (en) * | 2015-05-12 | 2018-01-02 | 日立汽车系统株式会社 | High pressure fuel pump |
| CN107575325A (en) * | 2017-10-20 | 2018-01-12 | 江苏常发农业装备股份有限公司 | A kind of equal pressure mechanical oil pump |
| CN107605632A (en) * | 2017-10-17 | 2018-01-19 | 奇瑞汽车股份有限公司 | A kind of automobile engine high pressure oil pump |
| CN107842452A (en) * | 2017-10-09 | 2018-03-27 | 中国第汽车股份有限公司 | A kind of monoblock type combined valve device, can pressure initialization fuel oil on-off controlling system and control method |
| CN107939667A (en) * | 2017-11-21 | 2018-04-20 | 聊城科瑞汽车零部件有限公司 | A kind of delivery valve holder on high-pressure oil pump |
| CN108869034A (en) * | 2018-09-05 | 2018-11-23 | 常熟瑞特电气股份有限公司 | A kind of prior-warning device for diesel engine fuel oil leakage flow |
| CN110159470A (en) * | 2019-05-31 | 2019-08-23 | 南京威孚金宁有限公司 | A kind of VE dispensing pump damping delivery valve and application method |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0142008A2 (en) * | 1983-11-17 | 1985-05-22 | Robert Bosch Gmbh | Delivery valve for fuel injection pumps |
| JPS62197773U (en) * | 1986-06-04 | 1987-12-16 | ||
| JPH0331575A (en) * | 1989-06-26 | 1991-02-12 | Nippondenso Co Ltd | Fuel discharge valve of fuel injector |
| JP2003293905A (en) * | 2002-04-04 | 2003-10-15 | Niigata Power Systems Co Ltd | Delivery valve of fuel injection pump |
| CN2903453Y (en) * | 2005-11-28 | 2007-05-23 | 潍柴动力股份有限公司 | Constant pressure oil outlet valve of diesel engine oil injection pump |
-
2010
- 2010-06-03 CN CN 201010192139 patent/CN101865062A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0142008A2 (en) * | 1983-11-17 | 1985-05-22 | Robert Bosch Gmbh | Delivery valve for fuel injection pumps |
| JPS62197773U (en) * | 1986-06-04 | 1987-12-16 | ||
| JPH0331575A (en) * | 1989-06-26 | 1991-02-12 | Nippondenso Co Ltd | Fuel discharge valve of fuel injector |
| JP2003293905A (en) * | 2002-04-04 | 2003-10-15 | Niigata Power Systems Co Ltd | Delivery valve of fuel injection pump |
| CN2903453Y (en) * | 2005-11-28 | 2007-05-23 | 潍柴动力股份有限公司 | Constant pressure oil outlet valve of diesel engine oil injection pump |
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103061936A (en) * | 2013-01-10 | 2013-04-24 | 无锡开普机械有限公司 | Oil inlet and outlet valve of common-rail pump |
| CN103061936B (en) * | 2013-01-10 | 2015-08-19 | 无锡开普机械有限公司 | The turnover fuel tap of common rail pump |
| CN103437930A (en) * | 2013-08-13 | 2013-12-11 | 南京威孚金宁有限公司 | Control method of isobaric valve performance |
| CN103470417A (en) * | 2013-09-27 | 2013-12-25 | 无锡威孚高科技集团股份有限公司 | Isobaric oil outlet valve |
| CN107532555A (en) * | 2015-05-12 | 2018-01-02 | 日立汽车系统株式会社 | High pressure fuel pump |
| CN107842452A (en) * | 2017-10-09 | 2018-03-27 | 中国第汽车股份有限公司 | A kind of monoblock type combined valve device, can pressure initialization fuel oil on-off controlling system and control method |
| CN107605632A (en) * | 2017-10-17 | 2018-01-19 | 奇瑞汽车股份有限公司 | A kind of automobile engine high pressure oil pump |
| CN107605632B (en) * | 2017-10-17 | 2020-02-07 | 奇瑞汽车股份有限公司 | High-pressure oil pump of automobile engine |
| CN107575325A (en) * | 2017-10-20 | 2018-01-12 | 江苏常发农业装备股份有限公司 | A kind of equal pressure mechanical oil pump |
| CN107575325B (en) * | 2017-10-20 | 2024-02-27 | 江苏常发农业装备股份有限公司 | Isobaric mechanical oil pump |
| CN107939667A (en) * | 2017-11-21 | 2018-04-20 | 聊城科瑞汽车零部件有限公司 | A kind of delivery valve holder on high-pressure oil pump |
| CN108869034A (en) * | 2018-09-05 | 2018-11-23 | 常熟瑞特电气股份有限公司 | A kind of prior-warning device for diesel engine fuel oil leakage flow |
| CN108869034B (en) * | 2018-09-05 | 2023-09-01 | 常熟市国瑞科技股份有限公司 | Early warning device for fuel leakage flow of diesel engine |
| CN110159470A (en) * | 2019-05-31 | 2019-08-23 | 南京威孚金宁有限公司 | A kind of VE dispensing pump damping delivery valve and application method |
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Application publication date: 20101020 |