CN103628945A - Differential pressure type lubricating device for free piston type internal combustion engine generator - Google Patents
Differential pressure type lubricating device for free piston type internal combustion engine generator Download PDFInfo
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- CN103628945A CN103628945A CN201310537413.9A CN201310537413A CN103628945A CN 103628945 A CN103628945 A CN 103628945A CN 201310537413 A CN201310537413 A CN 201310537413A CN 103628945 A CN103628945 A CN 103628945A
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Abstract
The invention relates to a differential pressure type lubricating device for a free piston type internal combustion engine generator, and belongs to the field of energy power. The differential pressure type lubricating device comprises free piston engines, a constant-pressure gas bottle, an air compressor, a pressure oil gas pipeline, a scavenging gas throttling front pipeline, a throttling one-way valve, a scavenging gas throttling rear pipeline and lubricating oil tanks. The pressure difference between the two gas pipelines coming out of the constant-pressure gas bottle is utilized to provide injection power for lubricating oil, the amount of lubricating oil injected in each cycle can be regulated by regulating of the throttling one-way valve, and therefore continuous lubricating oil films can be provided for friction between a piston ring and an air cylinder wall of the free piston type internal combustion engine generator, and cylinder scoring and the like caused by friction of the novel power device are prevented.
Description
Technical field
Patent of the present invention relates to the differential lubricating fitting of a kind of free piston IC generator, belongs to energy source and power field.
Background technique
Free piston IC power generation power system is a kind of novel power device growing up under the energy and external pressure background the thirties in 20th century, because internal-combustion engine has been cancelled connecting rod, piston only does linear reciprocating motion and stroke is not subject to mechanical constraint and gains the name, have compact structure, lightweight, start-stop easily, specific power advantages of higher.Early stage model machine is directly directly connected with gas turbine or gas compressor, externally exports energy or pressurized gas is provided, and in the middle of last century, is once becoming focus, but controlled technical limitations and slower development.Heavily the got back attention of domestic and international scientific research institution of the new type power technology of using as hybrid vehicle power generation system in 20 end of the centurys.
In free piston IC generator, cylinder head, cylinder liner and piston surround airtight combustion chamber volume jointly, by air-fuel mixture, burn and expand and promote piston movement ，Liang side combusion chamber circulating combustion promotion piston assurance generator normal power generation successively according to first law of thermodynamics combustion gas.（SaifulA.Zulkifli,MohdN.Karsiti,A.RashidA.AzizStartingofaFree-PistonLinearEngine-Generator?byMechanicalResonanceandRectangularCurrentCommutation[C],IEEEVehicle?PowerandPropulsionConference,September3-5,2008,Harbin,China）
Lubrication system is extremely important for internal-combustion engine, because the important function of piston ring is exactly and cylinder wall between closely cooperate and form the variable airtight combustion space that is easy to, and this extruding coordinate just caused strong rubbing action, lubrication system be exactly by lubricant oil deliver on cylinder wall, form and piston ring between film lubrication.The lubricated of traditional combustion engine mainly adopts and in crankcase, injects lubricant oil, and the lubricant oil of the meeting whipping bottom half that rotatablely moves of bent axle, to piston cavity and on cylinder wall, plays lubrication thereby reach to the friction between cylinder wall and piston ring.Yet free piston IC power generation power system is owing to having and traditional combustion engine difference structure, and this has also just brought challenge to the structural design of auxiliary lubricating system.In this Novel power system, moving element only has the mover assembly that comprises piston group, and it does linear reciprocating motion always, and this simple structure causes lubricant oil to deliver on cylinder wall according to conventional lubrication mode.
Summary of the invention
The object of the invention is, in order to solve the lubricated problem of free piston IC, to have proposed the differential lubricating fitting of a kind of free piston IC generator.
The object of the invention is to be achieved through the following technical solutions.
The differential lubricating fitting of free piston IC generator, comprises pipeline after pipeline before free piston engine, constant voltage gas cylinder, air compressor, force feed gas piping, scavenging gas throttling, throttling one-way valve, scavenging gas throttling, lubricating oil tank.
Described free piston engine 1 also comprises lubricant oil oil inlet hole and scavenging air box inlet hole.
Described lubricant oil oil inlet hole is opened on cylinder wall, and lubricant oil can enter into the scavenging air belt of free piston engine by lubricant oil oil inlet hole;
Described scavenging air box inlet hole is opened on scavenging tank wall, and gas can enter into the scavenging air belt of free piston engine by scavenging air box inlet hole;
Air compressor is connected with constant voltage gas cylinder, and air compressor provides gas pressure for constant voltage gas cylinder; Constant voltage gas cylinder connects respectively force feed gas piping and the front pipeline of scavenging gas throttling.Force feed gas piping is divided into two-way and is connected with the top of two lubricating oil tanks respectively, and the fuel tank oil outlet of lubricating oil tank bottom is connected with the lubricant oil oil inlet hole of cylinder block; Before scavenging gas throttling, pipeline is connected with pipeline after scavenging gas throttling by stream one-way valve; After scavenging gas throttling, pipeline is divided into two-way and is connected with the scavenging air box inlet hole of two scavenging air boxs respectively.
Working procedure: the gas in constant voltage gas cylinder keeps constant voltage, but because the effect of throttling one-way valve causes the gas pressure entering in scavenging air box slightly lower than the lubricant oil liquid level top pressure in lubricating oil tank, this pressure reduction is entered power is provided by lubricant oil oil inlet hole for lubricant oil, in each circulation, be accompanied by the to-and-fro motion of piston, lubricant oil all can enter in scavenging air flue on a small quantity, by scavenging gas, brought in cylinder liner again, be accompanied by the to-and-fro motion of piston and form lubricant film between cylinder wall and piston ring.
Beneficial effect
1, the differential lubricating fitting of a kind of free piston IC generator of the present invention, can utilize the pressure difference from constant voltage gas cylinder two gas pipings out to provide injection power to lubricant oil, by regulating throttling one-way valve, can adjust the lubricants capacity that each circulation is injected, thereby for the piston ring of free piston IC generator and the friction between cylinder wall provide lasting lubricant film, prevent the consequences such as scuffing of cylinder bore that this novel power device causes because of friction.
2, the differential lubricating fitting of a kind of free piston IC generator of the present invention, mainly relies on scavenging pressure to inject power as lubricant oil, for providing lubricant oil between the piston ring of this kind of internal-combustion engine and cylinder wall, guarantees complete machine stable operation,
Accompanying drawing explanation
Fig. 1 is the overall erection drawing of system free-piston internal combustion engine generator and oil dripping lubrication device;
Fig. 2 is the assembling of free piston IC electric generator structure and open-celled structure schematic diagram;
Fig. 3 is the erection drawing of lubricating oil tank and gas piping.
In figure, 1-free piston engine, 2-constant voltage gas cylinder, 3-air compressor, 4-force feed gas piping, pipeline before 5-scavenging gas throttling, 6-throttling one-way valve, pipeline after 7-scavenging gas throttling, 8-lubricating oil tank, 9-lubricant oil oil inlet hole, 10-scavenging air box inlet hole, 11-fuel tank oil outlet, 12-air pipe scavenging air outlet hole.
Embodiment
Below in conjunction with embodiment and accompanying drawing, the present invention will be further described.
The differential lubricating fitting of free piston IC generator, comprises pipeline 7 after pipeline 5 before free piston engine 1, constant voltage gas cylinder 2, air compressor 3, force feed gas piping 4, scavenging gas throttling, throttling one-way valve 6, scavenging gas throttling, lubricating oil tank 8.
Described free piston engine 1 also comprises lubricant oil oil inlet hole 9 and scavenging air box inlet hole 10.
Described lubricant oil oil inlet hole 9 is opened on cylinder wall, and lubricant oil can enter into the scavenging air belt of free piston engine by lubricant oil oil inlet hole;
Described scavenging air box inlet hole 10 is opened on scavenging tank wall, and gas can enter into the scavenging air belt of free piston engine by scavenging air box inlet hole;
Working procedure: when complete machine entry into service, this structural type of free piston IC generator has determined that piston is connected and moves reciprocatingly with connecting rod, and the effect that this device finally reaches is exactly for lasting lubricant oil stream is provided between piston ring and cylinder inner wall in each reciprocation cycle.
The pressure source of this differential lubricating fitting is from air compressor 3, and it guarantees that for constant voltage gas cylinder 2 continues to provide gas pressure the pressure in gas cylinder keeps constant.The gas of constant voltage gas cylinder 2 is divided into two-way, and the terminal of two gas pipings is pressed into lubricant oil in scavenging air flue by lubricant oil oil inlet hole 9 owing to there is pressure difference.In Fig. 1, can find out, gas in scavenging pipeline out enters afterwards pipeline 5 before scavenging gas throttling from constant voltage gas cylinder 2, gas has necessarily and reduces through throttling one-way valve 6 pressure, thereby the less pressure difference before and after formation valve, gas enters scavenging air box cavity volume from scavenging air box inlet hole 10 after pipeline 7 after scavenging gas throttling, this cavity volume has the effect of current stabilization and voltage stabilizing, then gas enters scavenging air flue, when piston movement to air inlet open time gas enter in firing chamber and discharge from relief opening, complete scavenging process.From constant voltage gas cylinder 2, an other road is out for the gas that lubricant oil the is extruded force feed gas piping 4 of first flowing through, then be divided into two-way enters in lubricating oil tank 8 simultaneously, lubricant oil in fuel tank has just been put into fuel tank when assembling, above lubricant oil, contact with the gas in force feed gas piping 4, bottom can contact with the gas in scavenging cavity volume by lubricant oil oil inlet hole 10.Because the existence of throttling one-way valve 6 forms small pressure difference, lubricant oil is pressed into scavenging air box cavity volume, and flowing due to scavenging gas, gas drives lubricant oil to enter in firing chamber by suction port, lubricant oil can be attached on cylinder wall along with the mobile of gas in the jar, for the to-and-fro motion between piston ring and cylinder wall provides lubricant film, owing to can having lubricant oil to enter to guarantee the lasting supply of lubricant oil in each circulation.
This pressure reduction lubricating fitting also needs to coordinate the lubricant oil that in Fig. 1, free piston IC generator has back and forth moved in each circulation to enter process.In the process that in Fig. 2, piston moves reciprocatingly, when relief opening is not also opened, in Fig. 3, the lubricant oil of 8 li of lubricating oil tanks is subject to the effect of small pressure difference, along 131 lubricant oil oil inlet holes, enter slowly in scavenging air flue, when piston continues to move right after air inlet open, piston can compress the space of scavenging cavity volume, now due to the existence of throttling one-way valve 6, gas in scavenging cavity volume can not turn back to after scavenging gas throttling in pipeline 7, and pressure can raise, higher pressure can enter in cylinder liner with the lubricant oil in air flue by scavenging air flue on the one hand, promote scavenging effect simultaneously, cause resistance and guarantee can not flow in a large number at this one-phase lubricant oil also can on the other hand the inflow of lubricant oil.Along with the iterative motion of piston, lubricant oil can have a small amount of injection in each circulation like this, and is accompanied by this motion and is evenly distributed on cylinder wall surface, provides to film lubrication between piston ring and cylinder wall and continues oil stream.
If want to adjust lubricant oil in the injection amount of each circulation, need to adjust throttling one-way valve 6, the pressure difference before and after this valve is larger, and the single cycle injection amount of lubricant oil is just larger, contrary just fewer.
Claims (4)
1. the differential lubricating fitting of free piston IC generator, is characterized in that: comprise pipeline (7) after pipeline (5) before free piston engine (1), constant voltage gas cylinder (2), air compressor (3), force feed gas piping (4), scavenging gas throttling, throttling one-way valve (6), scavenging gas throttling, lubricating oil tank (8); Described free piston engine (1) also comprises lubricant oil oil inlet hole (9) and scavenging air box inlet hole (10); Air compressor (3) is connected with constant voltage gas cylinder (2), and air compressor (3) provides gas pressure for constant voltage gas cylinder (2); Constant voltage gas cylinder (2) connects respectively force feed gas piping (4) and the front pipeline (5) of scavenging gas throttling; Force feed gas piping (4) is divided into two-way and is connected with the top of two lubricating oil tanks (8) respectively, and the fuel tank oil outlet 11 of lubricating oil tank (8) bottom is connected with the lubricant oil oil inlet hole (9) of cylinder block; Before scavenging gas throttling, pipeline (5) is connected with pipeline (7) after scavenging gas throttling by stream one-way valve (6); Pipeline after scavenging gas throttling (7) is divided into two-way and is connected with the scavenging air box inlet hole (10) of two scavenging air boxs respectively.
2. the differential lubricating fitting of a kind of free piston IC generator as claimed in claim 1, it is characterized in that: described lubricant oil oil inlet hole (9) is opened on cylinder wall, and lubricant oil can enter into the scavenging air belt of free piston engine by lubricant oil oil inlet hole.
3. the differential lubricating fitting of a kind of free piston IC generator as claimed in claim 1, it is characterized in that: described scavenging air box inlet hole (10) is opened on scavenging tank wall, and gas can enter into the scavenging air belt of free piston engine by scavenging air box inlet hole.
4. the differential lubricating fitting of a kind of free piston IC generator as claimed in claim 1, it is characterized in that: after pipeline before scavenging gas throttling (5) and scavenging gas throttling, between pipeline (7), be connected with throttling one-way valve (6), by regulating throttling one-way valve (6) can adjust the lubricants capacity that each circulation is injected.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310537413.9A CN103628945A (en) | 2013-11-04 | 2013-11-04 | Differential pressure type lubricating device for free piston type internal combustion engine generator |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310537413.9A CN103628945A (en) | 2013-11-04 | 2013-11-04 | Differential pressure type lubricating device for free piston type internal combustion engine generator |
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| CN103628945A true CN103628945A (en) | 2014-03-12 |
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| CN201310537413.9A Pending CN103628945A (en) | 2013-11-04 | 2013-11-04 | Differential pressure type lubricating device for free piston type internal combustion engine generator |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105275532A (en) * | 2015-10-28 | 2016-01-27 | 北京理工大学 | Pressure lubrication system of multi-module free piston internal combustion engine generator |
| CN106194315A (en) * | 2016-08-19 | 2016-12-07 | 新奥（中国）燃气投资有限公司 | A kind of internal combustion engine and internal combustion engine generator |
Citations (5)
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|---|---|---|---|---|
| US5611302A (en) * | 1995-06-30 | 1997-03-18 | Daimler-Benz Ag | Two cycle internal combustion engine with unidirectional flow scavenging |
| JP2005220835A (en) * | 2004-02-06 | 2005-08-18 | Daihatsu Motor Co Ltd | Piston lubricating device for two-cycle internal combustion engine |
| CN101749073A (en) * | 2008-12-18 | 2010-06-23 | 瓦特西拉瑞士股份有限公司 | Cylinder lubrication system as well as a reciprocating piston combustion engine with a cylinder lubrication device |
| CN102877929A (en) * | 2012-10-15 | 2013-01-16 | 北京理工大学 | Scavenging system of constant-pressure air source type free piston internal combustion generator |
| CN103225527A (en) * | 2012-01-30 | 2013-07-31 | 瓦锡兰瑞士公司 | Piston unit in cylinder and lubricant supply method for piston of piston unit |
-
2013
- 2013-11-04 CN CN201310537413.9A patent/CN103628945A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5611302A (en) * | 1995-06-30 | 1997-03-18 | Daimler-Benz Ag | Two cycle internal combustion engine with unidirectional flow scavenging |
| JP2005220835A (en) * | 2004-02-06 | 2005-08-18 | Daihatsu Motor Co Ltd | Piston lubricating device for two-cycle internal combustion engine |
| CN101749073A (en) * | 2008-12-18 | 2010-06-23 | 瓦特西拉瑞士股份有限公司 | Cylinder lubrication system as well as a reciprocating piston combustion engine with a cylinder lubrication device |
| CN103225527A (en) * | 2012-01-30 | 2013-07-31 | 瓦锡兰瑞士公司 | Piston unit in cylinder and lubricant supply method for piston of piston unit |
| CN102877929A (en) * | 2012-10-15 | 2013-01-16 | 北京理工大学 | Scavenging system of constant-pressure air source type free piston internal combustion generator |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105275532A (en) * | 2015-10-28 | 2016-01-27 | 北京理工大学 | Pressure lubrication system of multi-module free piston internal combustion engine generator |
| CN105275532B (en) * | 2015-10-28 | 2018-02-06 | 北京理工大学 | A kind of multimode free-piston internal combustion engine generator force feed system |
| CN106194315A (en) * | 2016-08-19 | 2016-12-07 | 新奥（中国）燃气投资有限公司 | A kind of internal combustion engine and internal combustion engine generator |
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Application publication date: 20140312 |