CN110374741A - A kind of micro- free-piston power device with secondary scavenging structure - Google Patents
A kind of micro- free-piston power device with secondary scavenging structure Download PDFInfo
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- CN110374741A CN110374741A CN201910521820.8A CN201910521820A CN110374741A CN 110374741 A CN110374741 A CN 110374741A CN 201910521820 A CN201910521820 A CN 201910521820A CN 110374741 A CN110374741 A CN 110374741A
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- Prior art keywords
- combustion chamber
- work room
- pistons work
- piston
- micro
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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
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B25/00—Engines characterised by using fresh charge for scavenging cylinders
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B63/00—Adaptations of engines for driving pumps, hand-held tools or electric generators; Portable combinations of engines with engine-driven devices
- F02B63/04—Adaptations of engines for driving pumps, hand-held tools or electric generators; Portable combinations of engines with engine-driven devices for electric generators
- F02B63/041—Linear electric generators
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B71/00—Free-piston engines; Engines without rotary main shaft
- F02B71/04—Adaptations of such engines for special use; Combinations of such engines with apparatus driven thereby
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
Abstract
The invention discloses a kind of micro- free-piston power devices with secondary scavenging structure, including cylinder and magnetic piston, it is divided into pistons work room and combustion chamber in cylinder, combustion chamber is separately positioned on pistons work room both ends, and it is connected to pistons work room, stator winding is wound on the outer wall of combustion chamber, stator winding connects rectifier；Exhaust outlet is arranged in center line along pistons work room side wall；Pressure check valve towards external-open is set on the side wall that combustion chamber is connect with pistons work room；The column part including central cylindrical portion and both ends of magnetic piston, central cylindrical portion are located in pistons work room, and column part is located in a combustion chamber.The exhaust gas of combustion chamber generation can effectively be sucked out using the toroidal vacuum chamber formed between magnetic piston and cylinder in each course of work by the present invention, and the exhaust gas between pistons work room and central cylindrical portion is discharged by the ipsilateral pressure check valve in combustion chamber, realize secondary scavenging.
Description
Technical field
The invention belongs to micro- free-piston field of power equipment technology more particularly to a kind of with the micro- of secondary scavenging structure
Free-piston power device.
Background technique
Free-piston engine is a kind of new engine gradually developed in recent years, it eliminates the song of conventional engines
Handle link mechanism, piston only do linear reciprocating motion, and the characteristics of motion of piston is determined by engine operation condition.Due to free work
The structure of piston engine is simple, easily micromation, thus the free-piston engine being miniaturized become in the world another new grind
Study carefully field.While micro-fabrication technology continues to develop, MEMS is rapidly developed, high-energy density, simple portable
Nowadays the power source equipment of formula also arouses people's interest.Micro- free piston installation is and existing as a kind of novel power device
Energy device compare, the thermal efficiency with higher, scale is small, carries more convenient, eliminates crank link mechanism, structure letter
Single, fuel can be lighted in the appropriate location of cylinder or compression ignition.
But there is also some disadvantages for micro- free-piston power device: structure distribution is compacter, and gas handling system does not obtain
It is effectively improved, fuel is unable to fully burn, and the exhaust gas in cylinder cannot be completely exhausted out, and results in micro-free-piston power in this way
Device can not even running, realize move back and forth.
Summary of the invention
The present invention proposes a kind of micro- free-piston with secondary scavenging structure according to problems of the prior art
, and it is an object of the present invention to provide a kind of structure design that exhaust gas in cylinder can more effectively be discharged, guarantee is miniature freely to live power device
Fill in power device even running.
The technical solution adopted in the present invention is as follows:
A kind of micro- free-piston power device with secondary scavenging structure, including cylinder and magnetic piston, the cylinder
Inside it is divided into pistons work room and combustion chamber, the combustion chamber is separately positioned on pistons work room both ends, and connects with pistons work room
It is logical, stator winding is wound on the outer wall of combustion chamber, the stator winding connects rectifier；Along the center line of pistons work room side wall
Exhaust outlet is set；Pressure check valve towards external-open is set on the side wall that combustion chamber is connect with pistons work room；
The column part including central cylindrical portion and both ends of the magnetic piston, the central cylindrical portion, which is located at, lives
It fills in operating room, the column part is located in a combustion chamber.
Further, when a certain side combusion chamber is in combustion process, magnetic piston movement is pushed, it is ipsilateral with the combustion chamber
Toroidal vacuum chamber is formed between pistons work room and central cylindrical portion, the exhaust gas of combustion chamber generation can effectively be sucked out；
Further, when a certain side combusion chamber is in compression process, the ipsilateral pressure check valve in the combustion chamber is opened, and will be lived
The exhaust gas filled between operating room and central cylindrical portion is discharged, and realizes secondary scavenging；
Further, it is equipped in the import being connect with the combustion chamber towards the breather cheek valve opened in combustion chamber；
Beneficial effects of the present invention:
(1) micro- free-piston powerplant configuration with secondary scavenging structure in the present invention is compact, is arranged symmetrically, and transports
Row is stablized, and running power loss is effectively reduced, and burns more abundant.
(2) whole device improves structure distribution, inlet duct compared with existing micro- free-piston power device in cylinder
Using the intake valve controlled by pressure, exhaust apparatus is also determined according to piston motion stroke, in piston operational process, is occurred
Two annular pressure vacuum chambers being arranged symmetrically carry out secondary scavenging to exhaust gas, this is conducive to burn more in reciprocating motion of the pistons
Add sufficiently.
(3) on cylinder symmetrical arrangement pressure check valve, using the principle of inside and outside differential pressure, in annular pressure vacuum chamber
The secondary scavenging of residual gas air inlet process, when exhaust gas is completely exhausted out, pressure check valve close.Structure distribution is reasonable, and two
The mode of secondary scavenging, which also solves the problems, such as over micro- free-piston power device, to be vented completely.
Detailed description of the invention
Fig. 1 is micro- free-piston powerplant configuration schematic diagram that the present invention has secondary scavenging structure；
Fig. 2 is minitype piston schematic diagram of the present invention；
Fig. 3 is the start-up course schematic diagram of minitype piston power device of the present invention
Fig. 4,5,6 and 7 are pistons for the first time by the process schematic that does work for the first time from left to right；
Fig. 8,9,10,11 and 12 are second to be turned left second of acting process schematic by the right side；
In figure, 1, left breather cheek valve, 2, cylinder, 3, stator winding, 4, rectifier, 5, upper exhaust outlet, 6, it is right unidirectionally into
Air valve, 7, lower exhaust outlet, 8, first pressure check valve, 9, second pressure check valve 10, third pressure check valve, the 11, the 4th pressure
Power check valve, 12, magnetic piston, 13, first annular vacuum chamber, the 14, second toroidal vacuum chamber, 15, left combustion chamber, 16, right combustion
Burn room.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, with reference to the accompanying drawings and embodiments, right
The present invention is further elaborated.It should be appreciated that described herein, the specific embodiments are only for explaining the present invention, not
For limiting the present invention.
As shown in Figure 1, a kind of micro- free-piston power device with secondary scavenging structure designed by the present invention, including
Cylinder 2, " ten " font column structure that cylinder 2 is centrosymmetric include pistons work room and combustion chamber, burning inside cylinder 2
Room is located at the left and right ends of pistons work room, respectively left combustion chamber 15 and right combustion chamber 16, and left combustion chamber 15, right combustion
It burns room 16 to be connected on same horizontal line and inside three with the center of pistons work room, in left combustion chamber 15 and right burning
The input end of room 16 is respectively provided with the left breather cheek valve 1 and right breather cheek valve 6 opened towards combustion chamber, in left burning
It is wound with stator winding 3 on the outer wall of room 15 and right combustion chamber 16 and stator winding 3 connects rectifier 4.
First pressure check valve 8 and second pressure check valve 9 are symmetrically housed on the left side side wall of pistons work room, in work
It fills in and third pressure check valve 10 and the 4th pressure check valve 11, above-mentioned first pressure list is symmetrically housed on the right side wall of operating room
To the list that valve 8, second pressure check valve 9, third pressure check valve 10 and the 4th pressure check valve 11 are all towards external opening
To valve.Along the center line of the vertical direction of pistons work room, upper exhaust outlet 5 is respectively set in the top and bottom of pistons work room
With lower exhaust outlet 7.
The magnetic piston 12 matched with cylinder 2 is provided in cylinder 2, as shown in Fig. 2, magnetic piston 12 includes centre
The column part of column part and both ends, central cylindrical portion are located in pistons work room, and column part is located at 2 burnings
It is indoor；The inner cavity left side of cylinder 2 is divided into left combustion chamber 15, first annular vacuum chamber 13 during the motion by magnetic piston 12,
The right is divided into right combustion chamber 16 and the second toroidal vacuum chamber 14.
For the clearer technical solution explaining the present invention and being protected, make below in conjunction with the course of work of the invention into one
Step is explained；
Start-up course: when magnetic piston 12 just blocks upper exhaust outlet 5 and lower exhaust outlet 7, the power device first stage is opened
Begin, first closure battery switch, alternating current is converted to using the rectified device 4 of the electric current issued in battery, through stator winding 3
The magnetic field of alternation is correspondingly issued, the magnetic fields of alternation make its movement in magnetic piston 12, and the starting work of generator starts.
The course of work: the initial position of magnetic piston 12 is as shown in figure 3, left breather cheek valve 1 and right one-way air inlet at this time
Valve 6 is in opening state, and live gas enters cylinder 2 from left breather cheek valve 1, and the magnetic fields of electromagnetism make magnetic piston
12 to moving on the left of cylinder 2；As shown in figure 4, left breather cheek valve 1 due in left combustion chamber 15 pressure it is excessive and close, it is magnetic
Piston 12 is run to the left, constantly squeezes the live gas in left combustion chamber 15, and right breather cheek valve 6 is in the open state,
Gas enters in right combustion chamber 16；As shown in figure 5, magnetic piston 12 during moving downward, constantly compresses left combustion chamber 15
In live gas, generate high-temp waste gas rapidly, push magnetic piston 12 to moving on the right side of cylinder 2；As shown in fig. 6, with work
Plug is constantly to moving on the right side of cylinder 2, the high-temp waste gas that left side generates, due to the effect of negative pressure, before exhaust outlet will be opened,
Symmetrical first annular vacuum chamber 13 is generated in cylinder 2, large quantity of exhaust gas quickly enters first annular vacuum chamber by left combustion chamber 15
In 13, and right combustion chamber 16 is constantly moved right with piston, and right breather cheek valve 6 is caused to close；As shown in fig. 7, when magnetism
When piston 12 runs to the right supreme exhaust outlet 5, lower exhaust outlet 7 is opened, the live gas in right combustion chamber 16 is by piston 12
Compression generates high-temp waste gas, and piston is pushed to move to the left；
As shown in figure 8, high-temp waste gas in right combustion chamber 16 pushes magnetic piston 12 to moving on the left of cylinder 2, due to upper
Exhaust outlet 5, lower exhaust outlet 7 are in the open state, and the pressure in left combustion chamber 15 is caused constantly to decline, and left breather cheek valve 1 is beaten
It opens, live gas enters in cylinder；As shown in figure 9, remaining in first constantly to when running on the left of cylinder 2 in magnetic piston 12
Exhaust gas in toroidal vacuum chamber 13 is discharged by first pressure check valve 8 and second pressure check valve 9, is completed the secondary of left side and is swept
Gas；As shown in Figure 10, piston 12 is compressing the gas in left combustion chamber 15 simultaneously, and gas, which burns, generates high-temp waste gas, and right combustion
The exhaust gas burnt in room 16 is discharged by upper exhaust outlet 5, lower exhaust outlet 7, the rapid pressure drop in right combustion chamber 16, it is right unidirectionally into
Air valve 6 is opened.The high-temp waste gas generated in left combustion chamber 15 pushes magnetic piston 12 to move right；As shown in figure 11, remain in
Exhaust gas in second annular pressure vacuum chamber 14, since vacuum chamber pressure increases, third pressure check valve 10, the 4th pressure are unidirectional
Valve 11 is opened, thus residual gas is discharged, and completes the secondary scavenging on right side.As shown in figure 12, until magnetic piston 12 is run
When to the second 14 right end of toroidal vacuum chamber, upper exhaust outlet 5, lower exhaust outlet 7 are opened simultaneously, and the exhaust gas of left combustion chamber 15 is inhaled into
In first annular vacuum chamber 13, the first stage that piston 12 moves back and forth terminates, repeatedly.
Micro- free-piston power device with secondary scavenging structure of the invention realizes breathing action and mixed gas
Combustion expansion process is alternately accomplished, and magnetic piston 12 is pushed to move back and forth, when magnetic piston 12 moves back and forth, according to opposite fortune
It is dynamic, winding wire is equivalent in the movement for doing cutting magnetic induction line, generates a certain size electric current；Tiny engine passes through gaseous mixture
The energy that compression and combustion releases is converted into the mechanical energy of piston, then by the power generator in generator by the mechanical energy of piston
It is converted into electric energy；The exhaust gas generated in combustion process is discharged by symmetrical pressure check valve, effectively solves the problems, such as that cylinder is taken a breath,
Guarantee power device even running, moves in circles；When load switch conjunction is closed and opened with battery switch, generator is negative
It carries and electric energy is provided；Magnetic piston during the motion, forms toroidal vacuum chamber, secondary scavenging effect is obvious, solves exhaust gas such as
The problem of what is more effectively discharged；Power device is arranged symmetrically, and runs high efficiency smooth.
Above embodiments are merely to illustrate design philosophy and feature of the invention, and its object is to make technology in the art
Personnel can understand the content of the present invention and implement it accordingly, and protection scope of the present invention is not limited to the above embodiments.So it is all according to
It is within the scope of the present invention according to equivalent variations made by disclosed principle, mentality of designing or modification.
Claims (5)
1. a kind of micro- free-piston power device with secondary scavenging structure, which is characterized in that living including cylinder (2) and magnetism
It fills in (12), is divided into pistons work room and combustion chamber in the cylinder (2), the combustion chamber is separately positioned on pistons work room two
End, and be connected to pistons work room, exhaust outlet is arranged in the center line along pistons work room side wall；In combustion chamber and pistons work room
Pressure check valve towards external-open is set on the side wall of connection；
The column part including central cylindrical portion and both ends of the magnetic piston (12), the central cylindrical portion, which is located at, lives
It fills in operating room, the column part is located in 2 combustion chambers.
2. a kind of micro- free-piston power device with secondary scavenging structure according to claim 1, which is characterized in that
It is wound on the outer wall of the combustion chamber stator winding (3), the stator winding (3) connects rectifier (4).
3. a kind of micro- free-piston power device with secondary scavenging structure according to claim 1, which is characterized in that
When a certain side combusion chamber is in combustion process, magnetic piston (12) movement, the pistons work room ipsilateral with the combustion chamber are pushed
Toroidal vacuum chamber is formed between central cylindrical portion, and the exhaust gas of combustion chamber generation can effectively be sucked out.
4. a kind of micro- free-piston power device with secondary scavenging structure according to claim 1, which is characterized in that
When a certain side combusion chamber is in compression process, the ipsilateral pressure check valve in the combustion chamber is opened, by pistons work room and centre
Exhaust gas discharge between column part, realizes secondary scavenging.
5. a kind of micro- free-piston power device with secondary scavenging structure according to claim 1, which is characterized in that
It is equipped in the import being connect with the combustion chamber towards the breather cheek valve opened in combustion chamber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910521820.8A CN110374741B (en) | 2019-06-17 | 2019-06-17 | Micro free piston power device with secondary scavenging structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910521820.8A CN110374741B (en) | 2019-06-17 | 2019-06-17 | Micro free piston power device with secondary scavenging structure |
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| Publication Number | Publication Date |
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| CN110374741A true CN110374741A (en) | 2019-10-25 |
| CN110374741B CN110374741B (en) | 2021-04-20 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB869046A (en) * | 1958-06-11 | 1961-05-25 | Daimler Benz Ag | Improvements relating to free-stroke-piston internal combustion engines |
| WO2001059277A1 (en) * | 2000-02-09 | 2001-08-16 | Alexius, Karl, R. | Free piston engine and self-actuated fuel injector therefor |
| CN200989243Y (en) * | 2006-11-03 | 2007-12-12 | 江苏大学 | Single-free piston double-cylinder type internal combustion engine power generating system |
| CN103711581A (en) * | 2014-01-07 | 2014-04-09 | 江苏大学 | Catalyzing combination micro free piston generator with preheating device |
| CN108350801A (en) * | 2015-10-23 | 2018-07-31 | 泰恩河畔纽卡斯尔大学 | Free-piston engine generating equipment |
-
2019
- 2019-06-17 CN CN201910521820.8A patent/CN110374741B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB869046A (en) * | 1958-06-11 | 1961-05-25 | Daimler Benz Ag | Improvements relating to free-stroke-piston internal combustion engines |
| WO2001059277A1 (en) * | 2000-02-09 | 2001-08-16 | Alexius, Karl, R. | Free piston engine and self-actuated fuel injector therefor |
| CN200989243Y (en) * | 2006-11-03 | 2007-12-12 | 江苏大学 | Single-free piston double-cylinder type internal combustion engine power generating system |
| CN103711581A (en) * | 2014-01-07 | 2014-04-09 | 江苏大学 | Catalyzing combination micro free piston generator with preheating device |
| CN108350801A (en) * | 2015-10-23 | 2018-07-31 | 泰恩河畔纽卡斯尔大学 | Free-piston engine generating equipment |
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| Publication number | Publication date |
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| CN110374741B (en) | 2021-04-20 |
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