CN109339944B - Miniature free piston generator - Google Patents
Miniature free piston generator Download PDFInfo
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- CN109339944B CN109339944B CN201811242971.1A CN201811242971A CN109339944B CN 109339944 B CN109339944 B CN 109339944B CN 201811242971 A CN201811242971 A CN 201811242971A CN 109339944 B CN109339944 B CN 109339944B
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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
- 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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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/32—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries for charging batteries from a charging set comprising a non-electric prime mover rotating at constant speed
Abstract
The invention provides a micro free piston generator, which comprises a stator and magnetic pistons, wherein the pistons are magnetic opposed pistons, the wall surface of the stator is provided with a stator winding and an excitation winding, the magnetic pistons are symmetrically arranged in the stator, the left magnetic piston is positioned between a first pressure chamber and a first air inlet cavity, the right magnetic piston is positioned between a second pressure chamber and a second air inlet cavity, the middle piston is positioned in a combustion chamber, and the combustion chamber is symmetrically provided with a combustion chamber exhaust port; the piston rod of the middle piston connected with the left magnetic piston is a first reducing rod, and the first pressure chamber is communicated with or blocked from the combustion chamber through the movement of the piston; and a piston rod connected with the piston rod of the middle piston and the piston rod of the right magnetic piston is a second variable diameter rod, and the second pressure chamber is communicated or blocked with the combustion chamber through the movement of the pistons. The invention realizes the process of air inlet from the air inlet cavity to the pressure chamber and ensures the fullness of the air inlet.
Description
Technical Field
The invention relates to the field of internal combustion engines or power generation, in particular to a miniature free piston generator.
Background
The free piston engine is a new engine gradually developed in recent years, a crank connecting rod mechanism of a traditional engine is cancelled, a piston only makes reciprocating linear motion, and the motion rule of the piston is determined by the operation working condition of the engine. Because the free piston engine has a simple structure and is easy to miniaturize, the miniaturized free piston engine becomes another new international research field. The mechanical structure of the micro free piston engine is not provided with mechanisms such as a crank connecting rod, an air valve and the like of the traditional internal combustion engine, and the free piston is not restricted by mechanical force in a cylinder, so that the micro free piston engine has very high work performance. Since the miniaturized free piston engine has a limited external power output mode, a micro free piston generator formed by organically combining a micro engine and a power generation device has become the mainstream research direction. Most of the existing micro power generation systems adopt thermoelectric materials for thermoelectric conversion, and the thermoelectric materials are additionally arranged on the surface of a combustor to directly convert heat energy into electric energy. This type of power generation requires high levels of thermoelectric materials and has a very limited lifetime. The micro free piston generator has the advantages of large volume efficiency, high energy conversion rate, long service life and the like, is unique in a plurality of micro power devices, and becomes a research hotspot of domestic and foreign scientific research institutions.
As is well known, the working efficiency of a two-stroke engine depends greatly on the air intake effect and scavenging efficiency of the engine, and for a micro free piston generator, the problems of insufficient air intake and exhaust and the like easily occur in the working process due to the large air intake resistance of a micro combustion chamber, so the problem of improving the air intake and scavenging effects of an internal combustion engine part can greatly improve the power generation efficiency. Secondly, due to the particularity of the size of the micro-generator, the fuel generates high-temperature and high-pressure exhaust gas after being combusted in the micro-combustion chamber, the energy in the exhaust gas accounts for about 40% of the total energy of the fuel, and the utilization of the energy can greatly improve the efficiency of the micro-generator. The utilization of exhaust gas preheating by the conventional engine with the conventional size has already provided relevant and mature technologies, such as exhaust gas turbocharging technology, exhaust gas thermoelectric generation technology and the like, but the technologies are not suitable for the miniaturized power plant. In addition, in all of the presently disclosed patents, no consideration is given to the exhaust gas treatment section of the micropower device. The existing micro-free piston generator is designed mostly in a mode of air inlet pressurization of an external device, and the design enables the device to be low in integration degree and needs to consume external work. There are also a few designs and adopt optimization device structural arrangement to realize the microgenerator process of admitting air, for example chinese patent adopts the air duct to be connected pressure chamber and air inlet, realizes admitting air when combustion chamber and pressure chamber produce the negative pressure, but because the both ends piston lacks rigid connection and actual gas has compressibility in this design, so the pressure of pressure chamber rises unobviously, and then the pressure boost effect of admitting air is unobvious. Secondly, in the design, an exhaust gas preheating air inlet system is arranged inside the device, and the structural design is not beneficial to the development of miniaturization; moreover, when the waste gas passes through the narrow exhaust pipe, a large part of heat of the waste gas can be dissipated, so that the waste gas preheating and air inlet effect is poor. And as the design of Chinese patent fails to consider the scavenging process of the micro-engine, the design has poor exhaust effect, and combustion waste gas is easy to remain in the combustion chamber, thereby influencing the working capacity of the device. In addition, the design does not consider recycling and processing of high-temperature waste gas, so that the problems of energy waste and environmental pollution are caused.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides a micro free piston generator, which achieves the effects of supercharging inlet air and good scavenging, and simultaneously designs an inlet air preheating system and an exhaust gas treatment system to utilize inlet air waste heat and reduce the emission of harmful substances. In the design, a double-combustion chamber and three-piston structure is adopted, the air intake is extruded into the combustion chamber through the extrusion action of the pistons, and the pressurized air intake can ensure sufficient air intake and achieve good scavenging effect; the structural arrangement of the combustion chamber between the pressure chambers at the two ends is adopted, the acting stroke of the piston in the middle of the combustion chamber is greatly shortened, and excessive heat dissipation loss caused by the dispersed arrangement of the combustion chambers is avoided. Waste gas generated in the micro combustion chamber firstly passes through the air inlet preheating system and transfers heat to fresh air inlet through the heat exchanger. Harmful substances such as CO and NO contained in the exhaust gasXThe waste gas is treated by the waste gas treatment system, so that the emission of harmful substances is reduced.
The present invention achieves the above-described object by the following technical means.
A micro free piston generator comprises a stator and magnetic pistons, wherein the pistons are magnetic opposed pistons, the wall surface of the stator is provided with a stator winding and an excitation winding, the magnetic pistons are symmetrically arranged in the stator, the magnetic pistons comprise left magnetic pistons, right magnetic pistons and middle pistons, the left magnetic pistons are positioned between a first pressure chamber and a first air inlet cavity, the right magnetic pistons are positioned between a second pressure chamber and a second air inlet cavity, the middle pistons are positioned in a combustion chamber, and exhaust ports of the combustion chamber are arranged at the symmetrical positions of the combustion chamber; the first pressure chamber is communicated with the first air inlet cavity, and the second pressure chamber is communicated with the second air inlet cavity;
the piston rod of the middle piston connected with the left magnetic piston is a first reducing rod, and the first pressure chamber is communicated with or blocked from the combustion chamber through the movement of the piston;
and a piston rod connected with the piston rod of the middle piston and the piston rod of the right magnetic piston is a second variable diameter rod, and the second pressure chamber is communicated or blocked with the combustion chamber through the movement of the pistons.
Further, the diameter of the first reducing rod is gradually changed from the left magnetic piston to the middle piston; the diameter of the second reducing rod is gradually changed from the right magnetic piston to the middle piston.
The gas collecting box is respectively communicated with the first gas inlet cavity and the second gas inlet cavity; and a preheating system is arranged in the gas collection box and is used for preheating gas entering the gas collection box.
Further, the preheating system comprises a heat exchange tube, and an inlet of the heat exchange tube is connected with an exhaust port of the combustion chamber; the heat exchange tube is wound inside the gas collection box.
Further, the outlet of the heat exchange tube is connected with a waste gas treatment system.
Further, the exhaust port of the combustion chamber is connected with an exhaust gas treatment system.
Furthermore, one-way valves are respectively arranged on pipelines between the first pressure chamber and the first air inlet cavity and between the second pressure chamber and the second air inlet cavity.
Further, the one-way valve comprises an I-shaped valve core and a partition plate, and the partition plate is positioned on a pipeline between the second pressure chamber and the second air inlet cavity or between the first pressure chamber and the first air inlet cavity; the middle of the clapboard is provided with a movable I-shaped valve core, and the clapboard is provided with at least 2 through holes; the lengths of two ends of the I-shaped valve core are different, and the through holes on the partition plate are communicated or blocked by the movement of the I-shaped valve core between the middle parts of the partition plates.
The invention has the beneficial effects that:
1. the micro free piston generator can realize air inlet pressurization without an external pressurization component, and the micro generator is arranged in a left-right symmetrical mode and is simple in structure, so that the structural design is more suitable for the development of miniaturization.
2. The micro free piston generator of the invention forms a pressure chamber and an air inlet cavity with variable volumes by the piston and the inner wall surface of the device, and the reciprocating motion of the piston changes the volumes of the pressure chamber and the air inlet cavity, thereby realizing the process of air inlet from the air inlet cavity to the pressure chamber. Fresh charge is charged into the micro combustion chamber after being pressurized by the pressure chamber, so that the filling property of the intake air is ensured.
3. The micro free piston generator of the invention delivers pressurized gas to the combustion chamber in corresponding strokes through the difference between the diameter of the connecting rod with variable diameter and the diameter of the air inlet passage of the combustion chamber. The scavenging passage and the exhaust passage are arranged at the left side and the right side of the combustion chamber, fresh gas enters the combustion chamber along the periphery of the connecting rod at the small diameter part for scavenging, and the scavenging effect is similar to the quality of direct-flow scavenging.
4. The micro free piston generator provided by the invention is provided with the air inlet preheating system, the fresh air inlet is preheated by utilizing the waste heat in the waste gas, the compression ignition condition of the fuel is reduced, the strong collision between the piston and the bottom of the combustion chamber is avoided, and the service life of the device is prolonged.
5. According to the micro free piston generator, the air inlet preheating system and the heat insulation layers are arranged on the outer wall of the on-way pipeline, so that waste heat caused by heat dissipation loss is reduced.
6. The micro free piston generator provided by the invention is provided with a waste gas treatment system, so that the emission of harmful substances such as CO and the like caused by insufficient combustion is avoided or reduced.
7. The micro free piston generator is designed aiming at the one-way valve of the micro-scale combustion chamber, has simple structure, safety, reliability and easy miniaturization, and avoids the backflow phenomenon caused by overlarge pressure of a pipeline or the combustion chamber.
Drawings
Fig. 1 is a schematic structural diagram of a micro free piston generator according to the present invention.
Fig. 2a is a schematic view of the internal structure of the check valve according to the present invention.
Fig. 2b is a schematic diagram of the closing of the check valve according to the present invention.
Fig. 2c is a schematic diagram of the opening and closing of the check valve according to the present invention.
FIG. 3 is a schematic diagram of the operation of the micro-generator according to the present invention, showing (a) the start-up phase, the first combustion chamber is filled with air, (b) the first combustion chamber is compressed, the second combustion chamber is filled with air, (c) the first combustion chamber is compressed and ignited, the second combustion chamber is filled with air and saturated, (d) the second combustion chamber is compressed, the first combustion chamber is scavenged, the exhaust gas is preheated and filled with air and discharged through the exhaust gas treatment system, (e) the second combustion chamber is compressed and ignited, the first combustion chamber is filled with air and saturated, (f) the first combustion chamber is compressed, the second combustion chamber is scavenged, the exhaust gas is preheated and filled with air and discharged through the exhaust gas treatment system, (g) the compression and ignition process of the first combustion.
In the figure:
1-a current inverter; 2-a piston; 3-exciting the winding; 4-left stator winding; 5-a first combustion chamber; 6-right stator winding; 7-a second combustion chamber; 8-a piston rod; 9-a second pressure chamber; 10-a one-way valve; 11-a first air intake chamber; 12-a first pressure chamber; 13-an air intake duct; 14-insulating layer; 15-a gas collection tank; 16-an air inlet; 17-combustion chamber exhaust; 18-an exhaust gas treatment system; 19-an exhaust port; 20-heat exchange tube; 21-a second inlet chamber; 22-stator.
Detailed Description
The invention will be further described with reference to the following figures and specific examples, but the scope of the invention is not limited thereto.
As shown in fig. 1, the micro free piston generator of the present invention includes a stator 22 and a magnetic piston 2, wherein the piston 2 is a magnetic opposed piston, a left stator winding, a right stator winding 6 and an excitation winding 3 are disposed on a wall surface of the stator 22, the magnetic piston 2 is symmetrically disposed inside the stator 22, the magnetic piston 2 includes a left magnetic piston, a right magnetic piston and a middle piston, the left magnetic piston is disposed between a first pressure chamber 12 and a first air inlet cavity 11, the right magnetic piston is disposed between a second pressure chamber 9 and a second air inlet cavity 21, the middle piston is disposed in a combustion chamber and divides the combustion chamber into a first combustion chamber 5 and a second combustion chamber 7 which are not communicated with each other, and a combustion chamber exhaust port 17 is disposed at a symmetrical position of the combustion chamber; the first pressure chamber 12 is communicated with the first air inlet cavity 11, and the second pressure chamber 9 is communicated with the second air inlet cavity 21; the piston rod 8 connected with the left magnetic piston and the middle piston is a first reducing rod, and the first pressure chamber 12 is communicated or blocked with the combustion chamber 5 through the movement of the piston 2; and the piston rod 8 connected with the piston rod 8 of the middle piston and the right magnetic piston is a second variable diameter rod, and the second pressure chamber 9 is communicated with or blocked from the combustion chamber through the movement of the piston 2. The diameter of the first reducing rod is gradually changed from the left magnetic piston to the middle piston; the diameter of the second reducing rod is gradually changed from the right magnetic piston to the middle piston.
The gas collecting box 15 is respectively communicated with the first gas inlet cavity 11 and the second gas inlet cavity 21 through a gas inlet guide pipe 13; the air inlet guide pipe 13 is externally wrapped with an insulating layer 14; a preheating system is arranged in the gas collection tank 15 and used for preheating gas entering the gas collection tank 15. The gas collection box 15 is provided with an air inlet 16 for supplying air to the first air inlet chamber 11 and the second air inlet chamber 21. The preheating system comprises a heat exchange tube 20, and an inlet of the heat exchange tube 20 is connected with an exhaust port 17 of the combustion chamber; the heat exchange tube 20 is wound inside the gas collecting box 15. The outlet of the heat exchange pipe 20 is connected with an exhaust gas treatment system 18. The exhaust of the exhaust treatment system 18 is connected to an exhaust collection tank.
As shown in fig. 2a, the pipelines between the first pressure chamber 12 and the first air inlet cavity 11 and between the second pressure chamber 9 and the second air inlet cavity 21 are respectively provided with a one-way valve 10. The check valve 10 comprises an I-shaped valve core and a partition plate, and the partition plate is positioned on a pipeline between the second pressure chamber 9 and the second air inlet cavity 21 or between the first pressure chamber 12 and the first air inlet cavity 11; the middle of the clapboard is provided with a movable I-shaped valve core, and the clapboard is provided with at least 2 through holes; the lengths of two ends of the I-shaped valve core are different, and the through holes on the partition plate are communicated or blocked by the movement of the I-shaped valve core between the middle parts of the partition plates. As shown in fig. 2b and 2c, the check valve 10 is of an i-shaped structure, and a valve plate with i-shaped valve cores of different sizes is designed according to pressures at two ends of the valve. When the small valve plate is closed, the one-way valve is opened to allow the fluid at the side with high pressure intensity to flow to the side with low pressure intensity; when the large valve is closed, the one-way valve is closed, and fluid is not allowed to pass through the valve pipeline.
The working principle is that the stator 22 and the piston 2 of the micro free piston generator are both made of heat-resistant materials with excellent magnetic property and high resistivity, the piston 2 is also used as an armature, and the starting of the generator is completed by electromagnetic force. The left stator winding 4 and the right stator winding 6 are respectively wound on the left half part and the right half part of the stator, and the number of the left stator winding 4 and the right stator winding 6 is related to the length of the micro-combustion chamber cylinder; the left stator winding 4 is connected with the current inverter 1 in series, the right stator winding 6 is connected with the other current inverter in series, under the excitation of the excitation winding, the piston moves linearly, and the piston cuts the magnetic induction line to generate electric energy; under the conditions that the load switch is closed and the storage battery switch is opened, the generator provides electric energy for the load; with the load switch open and the battery switch closed, the power generated by the generator is transferred to the battery for storage.
The working mode is as follows:
before the generator is started as shown in fig. 3a, the fresh homogeneous mixture in the gas collecting tank 15 enters the first gas inlet cavity 11 and the first pressure chamber 12 through the gas inlet conduit 13, the first reducer rod enables the first pressure chamber 12 to be communicated with the first combustion chamber 5, and the mixture in the first pressure chamber 12 enters the first combustion chamber 5 through the combustion chamber inlet channel. The storage battery switch is closed, the current generated in the storage battery is converted into alternating current through the current inverter 1, an alternating magnetic field is correspondingly generated through the left stator winding 4 and the right stator winding 6, the alternating magnetic field acts on the piston 2 to enable the piston to move, and the starting operation of the generator is started. The magnetic piston 2 is driven to move to the right by the electromagnetic force, and compresses the homogeneous mixture in the first combustion chamber 5.
As shown in fig. 3b, in the process of compressing the homogeneous mixture in the first combustion chamber 5, when the piston is operated to a certain position, the second reducer rod makes the second pressure chamber 9 communicate with the second combustion chamber 7; the fresh air mixture in the second pressure chamber 9 enters the second combustion chamber 7 from the combustion chamber air inlet channel under the extrusion action of the piston, and the air inlet work of the second combustion chamber is started.
As shown in fig. 3c, the piston 2 is driven by the electromagnetic force to move left until the homogeneous mixture in the first combustion chamber 5 is compression ignited, and the intake of the second combustion chamber 7 is completed at the time of ignition of the first combustion chamber 5.
As shown in fig. 3d, the piston moves back to the right after the ignition of the first combustion chamber 5, causing the piston to compress the homogeneous mixture in the second combustion chamber 7; when the piston moves to a certain position rightwards, the exhaust port 17 of the combustion chamber is opened at the moment, the fresh mixed gas in the first pressure chamber 12 enters the first combustion chamber 5 from the combustion chamber air inlet channel under the extrusion action of the piston, and the fresh fuel pressurized by the first pressure chamber 12 enters the first combustion chamber 5 to sweep the waste gas; the waste gas enters the inlet air preheating system through the exhaust port 17, and the heat in the waste gas is transferred to the fresh mixed gas in the gas collection box 15 through the heat exchange effect of the heat exchanger 20; after preheating, fresh gas with a certain temperature enters the second gas inlet cavity 21 through the gas inlet guide pipe 13, and the gas inlet guide pipe 13 and the surface of the gas collection box are uniformly filled with heat insulation materials along the way, so that energy loss caused by heat exchange loss is avoided; the movement of the piston presses the fresh mixture of the second inlet chamber 21 into the second pressure chamber 9; the exhaust gas from the intake air preheating system is delivered to an exhaust gas treatment system 18, which is used for eliminating or reducing the emission of harmful substances such as CO in the exhaust gas, and the exhaust gas is treated by the exhaust gas treatment system and then discharged from an exhaust gas treatment exhaust port 19 to the outside of the apparatus.
As shown in fig. 3e, the piston is forced to move to the right until the homogeneous mixture in the second combustion chamber 7 is compression ignited, and the air intake and exhaust of the first combustion chamber 5 are completed at the same time when the second combustion chamber 7 is ignited; also, exhaust gas generated in the process is discharged from the exhaust port 17 to the outside of the apparatus through the intake air preheating system and the exhaust gas pretreatment system 18.
As shown in fig. 3f, after the second combustion chamber 7 catches fire, the pressure of the combustion chamber increases sharply, pushing the piston to move leftwards, and promoting the piston to compress the homogeneous mixed fuel of the first combustion chamber 5; when the piston moves to a certain position leftwards, the exhaust port 17 of the combustion chamber is opened at the moment, fresh inlet air of the second pressure chamber 9 enters the second combustion chamber 7 from the combustion chamber air inlet channel under the extrusion action of the piston, and fresh fuel pressurized by the second pressure chamber 9 enters the second combustion chamber 7 to sweep waste gas; meanwhile, the gas collection box 15 feeds gas to the second gas inlet cavity and the second pressure chamber 9; also, the exhaust gas discharged from the exhaust port 17 in this process is discharged to the outside of the apparatus through the intake air preheating system and the exhaust gas pretreatment system.
As shown in fig. 3g, the piston 2 is forced to move to the left until the homogeneous charge of the first combustion chamber 5 is compression ignited, and the charge and discharge of the second combustion chamber 7 are completed simultaneously at the time of ignition of the first combustion chamber 5.
So far, the whole cycle combustion process of the micro-generator is completed. The left and right air inlet and exhaust processes and the mixed gas combustion and expansion process are alternately finished to push the magnetic piston 2 to reciprocate, and when the magnetic piston reciprocates, the relative motion is equivalent to the motion of cutting a magnetic induction line by a coil wire so as to generate a certain current; the micro engine converts energy released by compressed combustion of the mixed gas into mechanical energy of the piston, and then converts the mechanical energy of the piston into electric energy through a power generation device in the generator; the waste gas generated in the combustion process preheats the inlet air through the inlet air preheating system, the ignition condition of the fuel can be reduced under the action of inlet air preheating, and the waste gas is treated by the waste gas treatment system and then discharged outside the device. Under the conditions that the load switch is closed and the storage battery switch is opened, the generator provides electric energy for the load; under the condition that the load switch is opened and the storage battery switch is closed, the power generation of the generator is transmitted to the storage battery for storage.
The present invention is not limited to the above-described embodiments, and any obvious improvements, substitutions or modifications can be made by those skilled in the art without departing from the spirit of the present invention.
Claims (8)
1. A micro free piston generator comprises a stator (22) and magnetic pistons (2), wherein the pistons (2) are oppositely arranged magnetic pistons, the wall surface of the stator (22) is provided with stator windings (4, 6) and an excitation winding (3), and the magnetic pistons (2) are symmetrically arranged inside the stator (22), the micro free piston generator is characterized in that the magnetic pistons (2) comprise a left magnetic piston, a right magnetic piston and a middle piston, the left magnetic piston is positioned between a first pressure chamber (12) and a first air inlet cavity (11), the right magnetic piston is positioned between a second pressure chamber (9) and a second air inlet cavity (21), the middle piston is positioned in a combustion chamber, and the combustion chamber is symmetrically provided with combustion chamber exhaust ports (17); the first pressure chamber (12) is communicated with the first air inlet cavity (11) and the second pressure chamber (9) is communicated with the second air inlet cavity (21) respectively;
a piston rod (8) connected with the middle piston and the left magnetic piston is a first variable diameter rod, and a first pressure chamber (12) is communicated or blocked with the combustion chamber (5) through the movement of the piston (2);
and a piston rod (8) connected with the middle piston and the right magnetic piston is a second variable diameter rod, and a second pressure chamber (9) is communicated or blocked with the combustion chamber through the movement of the piston (2).
2. The micro free-piston generator of claim 1, wherein the first reducer bar is tapered in diameter from a left magnetic piston to a middle piston; the diameter of the second reducing rod is gradually changed from the right magnetic piston to the middle piston.
3. The micro free-piston generator of claim 1, further comprising a gas collection box (15), the gas collection box (15) communicating with the first and second gas inlet chambers (11, 21), respectively; and a preheating system is arranged in the gas collection box (15) and is used for preheating gas entering the gas collection box (15).
4. The micro free-piston generator according to claim 3, wherein the preheating system comprises a heat exchange tube (20), an inlet of the heat exchange tube (20) being connected to a combustion chamber exhaust port (17); the heat exchange tube (20) is wound inside the gas collection box (15).
5. The micro free-piston generator according to claim 4, characterized in that the heat exchange tube (20) outlet is connected to an exhaust gas treatment system (18).
6. The micro free piston generator according to any of claims 1-3, characterized in that the combustion chamber exhaust port (17) is connected to an exhaust gas treatment system (18).
7. The micro free piston generator according to any of claims 1-3, characterized in that the pipes between the first pressure chamber (12) and the first inlet chamber (11) and between the second pressure chamber (9) and the second inlet chamber (21) are provided with a one-way valve (10), respectively.
8. The micro free-piston generator according to claim 7, characterized in that the check valve (10) comprises an I-shaped spool and a diaphragm located on the conduit between the second pressure chamber (9) and the second inlet chamber (21) or the first pressure chamber (12) and the first inlet chamber (11); the middle of the clapboard is provided with a movable I-shaped valve core, and the clapboard is provided with at least 2 through holes; the lengths of two ends of the I-shaped valve core are different, and the through holes on the partition plate are communicated or blocked by the movement of the I-shaped valve core between the middle parts of the partition plates.
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| CN201811242971.1A CN109339944B (en) | 2018-10-24 | 2018-10-24 | Miniature free piston generator |
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| CN201811242971.1A CN109339944B (en) | 2018-10-24 | 2018-10-24 | Miniature free piston generator |
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| CN109339944B true CN109339944B (en) | 2020-11-03 |
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| CN110608094B (en) * | 2019-09-20 | 2022-12-16 | 山东休普动力科技股份有限公司 | Back-mounted double-winding double-piston type free piston linear generator with motor |
| CN112196669B (en) * | 2020-12-02 | 2021-04-30 | 中国科学院宁波材料技术与工程研究所 | Free piston power generation system with multi-stage restoring device |
| CN113944592B (en) * | 2021-11-26 | 2023-05-26 | 武汉氢能与燃料电池产业技术研究院有限公司 | Deepwater hydroelectric generation device |
| CN115324727B (en) * | 2022-08-25 | 2023-10-20 | 北京理工大学 | Supercharged air inlet and rotor state identification device and method of free piston internal combustion generator |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102877941A (en) * | 2012-10-15 | 2013-01-16 | 北京理工大学 | Starting system of high-pressure air source type free piston internal combustion generator |
| CN108026833A (en) * | 2015-07-15 | 2018-05-11 | 阿夸里尔斯发动机（A.M.)有限公司 | Free-piston engine |
| CN108049969A (en) * | 2017-11-30 | 2018-05-18 | 江苏大学 | A kind of micro-free-piston power set with UTILIZATION OF VESIDUAL HEAT IN |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10815878B2 (en) * | 2017-03-10 | 2020-10-27 | The Government of the United States of America, as represented by the Secretary of Homeland Security | Homogeneous charge compression ignition linear generator |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102877941A (en) * | 2012-10-15 | 2013-01-16 | 北京理工大学 | Starting system of high-pressure air source type free piston internal combustion generator |
| CN108026833A (en) * | 2015-07-15 | 2018-05-11 | 阿夸里尔斯发动机（A.M.)有限公司 | Free-piston engine |
| CN108049969A (en) * | 2017-11-30 | 2018-05-18 | 江苏大学 | A kind of micro-free-piston power set with UTILIZATION OF VESIDUAL HEAT IN |
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