CN212202242U - Free piston type linear power generation device - Google Patents
Free piston type linear power generation device Download PDFInfo
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- CN212202242U CN212202242U CN202020268607.9U CN202020268607U CN212202242U CN 212202242 U CN212202242 U CN 212202242U CN 202020268607 U CN202020268607 U CN 202020268607U CN 212202242 U CN212202242 U CN 212202242U
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Abstract
The utility model relates to a free piston type linear power generation device, belonging to the technical field of free piston type linear power generation devices; the technical problem to be solved is as follows: the improvement of the structure of the free piston type linear power generation device is provided; the technical scheme for solving the technical problem is as follows: the electromagnetic driving type generator comprises a cylinder, wherein one end of the cylinder is provided with an electromagnetic driving valve, a spark plug and an oil sprayer, and the other end of the cylinder is connected with a generator cavity; a piston is arranged in a cylinder body of the cylinder, the piston is connected with a rotor magnetic yoke arranged in a generator chamber through a push rod, and a rotor magnetic pole is arranged on the outer surface of the rotor magnetic yoke; a stator core is arranged on the inner wall of the generator cavity, and a winding is arranged on the stator core; the extension end of the push rod is connected with a motor rotor, a displacement sensor is further arranged on the motor rotor, and the motor rotor is connected with a linear motor; the utility model discloses be applied to sharp power generation facility.
Description
Technical Field
The utility model relates to a free piston linear power generation device belongs to free piston linear power generation device technical field.
Background
In recent years, there are many countries, domestic universities and scientific research institutions, which pay more attention to free piston generators, the generators take a linear motor as a load on the basis of the traditional free piston engine, can directly convert heat energy generated by fuel combustion into cleaner electric energy for output, and compared with the traditional engine, the generators abandon a crank connecting rod mechanism of the traditional engine, and have the advantages of high heat efficiency, variable compression ratio, wide fuel adaptability and the like; the engine can be used on a pure electric automobile and a hybrid electric automobile, and can also be applied to the fields of mobile power supplies, portable power generation equipment and the like.
However, the currently used free piston generator is mainly a single-cylinder two-stroke free piston generator, and a spring (an air spring or a mechanical spring) is adopted to adjust the piston to return, so that the defects of poor environmental protection performance, complex structure, high part cost and the like exist, and the free piston generator cannot be put on the market in mass production and needs to be improved.
SUMMERY OF THE UTILITY MODEL
The utility model discloses an overcome not enough that exists among the prior art, the technical problem that will solve is: provides an improvement of a free piston type linear power generation device structure.
In order to solve the technical problem, the utility model discloses a technical scheme be: a free piston type linear power generation device comprises a cylinder, wherein one end of the cylinder is provided with an electromagnetic driving valve, a spark plug and an oil injector, and the other end of the cylinder is connected with a cavity of a generator;
a piston is arranged in a cylinder body of the cylinder, the piston is connected with a rotor magnetic yoke arranged in a generator chamber through a push rod, and a rotor magnetic pole is arranged on the outer surface of the rotor magnetic yoke;
a stator core is arranged on the inner wall of the generator cavity, and a winding is arranged on the stator core;
the extension end of the push rod is connected with a motor rotor, a displacement sensor is further arranged on the motor rotor, and the motor rotor is connected with a linear motor;
the control ends of the electromagnetic driving valve, the spark plug, the oil injector, the displacement sensor and the linear motor are connected with a controller arranged in a control room through leads, the power output end of the stator core is connected with an electric energy storage module, and a power converter is arranged in the electric energy storage module;
and the power output end of the electric energy storage module is respectively connected with the linear motor and the controller.
The model of a control chip used in the controller is STM32F405RGT 6;
the type of the displacement sensor is CZ 891;
the model of the linear motor is BZD-181N.
The utility model discloses beneficial effect for prior art possesses does: the utility model provides a device for generating electricity based on four-stroke control piston action, which adopts a double-cylinder internal combustion engine reverse parallel connection mode to ensure that the power output is large enough, compared with the traditional single-cylinder internal combustion engine design mode, the device effectively reduces the vibration inertia and has good working stability; the utility model provides a power generation device cylinder body has the advantages of high thermal efficiency, variable compression ratio, wide fuel adaptability and the like, compared with the existing two-stroke piston generator, the power stroke is longer, so that fuel oil can be fully combusted, the fuel consumption is reduced, and the emission of harmful gas can be reduced; the utility model discloses with four-stroke free piston engine and linear type generator rational assembly, make performance characteristics and advantage between them obtain full play, simple structure, reliability height.
Drawings
The present invention will be further explained with reference to the accompanying drawings:
fig. 1 is a schematic structural view of the present invention;
fig. 2 is a schematic structural diagram of the control circuit of the present invention;
FIG. 3 is a schematic view of the working process of the present invention;
FIG. 4 is a graph of the position parameters and the time trend of the piston in the cylinder according to the present invention;
FIG. 5 is a diagram illustrating the effect of the present invention;
in the figure: the device comprises a cylinder 1, an electromagnetic driving valve 2, a spark plug 3, an oil injector 4, a generator chamber 5, a piston 6, a push rod 7, a rotor yoke 8, a rotor magnetic pole 9, a stator core 10, a winding 11, a motor rotor 12, a displacement sensor 13, a linear motor 14, a controller 15 and an electric energy storage module 16.
Detailed Description
As shown in fig. 1 to 5, the utility model provides a free piston type linear power generation device, which comprises a cylinder 1, wherein one end of the cylinder 1 is provided with an electromagnetic driving valve 2, a spark plug 3 and a fuel injector 4, and the other end of the cylinder 1 is connected with a generator chamber 5;
a piston 6 is arranged in the cylinder body of the cylinder 1, the piston 6 is connected with a rotor magnetic yoke 8 arranged in the generator chamber 5 through a push rod 7, and the outer surface of the rotor magnetic yoke 8 is provided with a rotor magnetic pole 9;
a stator core 10 is arranged on the inner wall of the generator cavity 5, and a winding 11 is arranged on the stator core 10;
the extending end of the push rod 7 is connected with a motor rotor 12, a displacement sensor 13 is further arranged on the motor rotor 12, and the motor rotor 12 is connected with a linear motor 14;
the control ends of the electromagnetic driving valve 2, the spark plug 3, the oil injector 4, the displacement sensor 13 and the linear motor 14 are connected with a controller 15 arranged in a control chamber through leads, the power output end of the stator core 10 is connected with an electric energy storage module 16, and a power converter is further arranged in the electric energy storage module 16;
and the power output end of the electric energy storage module 16 is respectively connected with the linear motor 14 and the controller 15.
The utility model provides a four-stroke free piston generator includes automatically controlled module and mechanical module:
the electric control module comprises a complete machine module control system, an electric energy storage module, a sensor and the like; the utility model provides an inside group battery that includes of electric energy storage module, the electric energy that the group battery can save motor active cell motion in the magnetic field and produce, the inside power converter who sets up of electric energy storage module can realize the two-way flow of electric energy between engine and the group battery, and the controller can realize four-stroke thermodynamic cycle according to reciprocating motion, fuel injection, the switch of intake and exhaust valves and the ignition burning of the feedback current of motor and displacement velocity signal control motor.
The mechanical part comprises components such as a four-stroke free piston engine, a linear motor and the like, wherein the free piston and a motor rotor are fixedly connected to form a piston assembly which is a main moving component.
The utility model discloses a generating mode is mainly for possessing the cycle work of four-stroke stage control free piston generator, the start-up stage or when catching fire appear, linear electric motor work is in the motor mode, promote the motion of piston motion subassembly, through the position and the speed of installing the whole piston motion subassembly of displacement sensor real-time detection on motor active cell, and feed back to controller ECU, controller ECU is through the displacement of calculating the piston, speed and mid point data carry out corresponding control, drag the motion of piston subassembly by linear electric motor, until satisfying the condition of igniteing, realize the stable state after catching fire, the motor switches back the power generation state.
As shown in fig. 3, the power generation device provided by the utility model has the following steps:
the first stage is an intake stroke, the piston assembly reaches a rated position, the ECU controls the intake valve to be opened, meanwhile, the linear motor drives the piston assembly to move downwards to a position x1 from a top dead center position, the intake stroke is completed, when the piston assembly moves downwards, the ECU performs air passage fuel injection according to control of the fuel injection nozzle, and at the moment, the linear motor works in a motor mode. At this stage, the displacement (specific position of x 1) and speed of the piston assembly are both calculated by the ECU according to the load size and then are given and accurately controlled;
the second stage is a compression stroke, the ECU controls the closing of the air inlet valve, the piston assembly moves upwards to a rated position x2 under the driving action of the linear motor, the mixed gas is compressed, the compression stroke is completed, at the moment, the linear motor works in a motor mode, and in the stage, the displacement (the specific position x 2) and the speed of the piston assembly are calculated by the ECU according to the load size and then are given and accurately controlled;
the third stage is a power stroke, when the piston moves to a rated ignition position, the ECU sends out ignition pulses to ignite mixed gas in the cylinder, when the piston assembly moves to the rated position, the linear motor working mode switching circuit conducts the linear motor and the load circuit, at the moment, the linear motor works in a generator mode, the explosion pressure pushes the piston assembly to move downwards to the x3 position, and the motor rotor cuts the magnetic induction lines to generate induction current. At this stage, the ignition time is calculated and adjusted by the ECU according to parameters such as load size, coolant temperature and the like and is accurately controlled, the displacement (the specific position of x 3) of the piston assembly is controlled by the ECU, and stopping is carried out when the explosion pressure is reduced to a critical value;
the fourth stage is an exhaust stroke, after the piston assembly stops, the ECU controls the exhaust valve to open, the linear motor pulls the piston to move to a rated position x4, waste gas is exhausted out of the cylinder, the exhaust stroke is finished, and at the moment, the linear motor works in a motor mode.
The utility model provides a four-stroke free piston straight line power generation facility, simple structure, power quality relative altitude, return means's cancellation makes the device simple structure, and cost reduction, power quality is than improving.
The generator part of the whole device cancels a spring device for returning the rotor, the ECU controls the current and the direction of the motor, so that the rotor of the generator and the piston assembly integrated with the free piston move to realize accurate return and stroke, and the stroke of the generator is properly lengthened to be matched with the engine to fully do work.
The engine part of the device adopts four-stroke working cycle, the size and the period of each stroke can be accurately controlled by the ECU, dynamic and flexible adjustment is realized, and the thermal efficiency can be improved to the maximum extent; during specific control, the size of an air inlet stroke can be changed according to actual requirements, and the size of the air inlet stroke can be controlled according to requirements, so that the air inlet amount is controlled, and the output power is adjusted; the compression stroke is controlled by an ECU, and the top dead center is properly improved so as to improve the compression ratio and the heat efficiency; the exhaust stroke is controlled by the ECU, the starting time is delayed, the period is properly prolonged, and the tail gas is fully exhausted while the pumping loss is reduced; in addition, the lower dead point of the working stroke is controlled by the ECU, and the stopping can be performed when the explosion pressure is reduced to a critical value, so that the working stroke is increased, the heat energy conversion efficiency is effectively improved, the gas can be fully combusted due to the increase of the stroke, the exhaust temperature is low, harmful emissions are less, and the post-treatment cost is saved.
The utility model discloses when in-service use, adopt the reverse parallel design of even number jar to use the device internal-combustion engine, ECU is through the position and the speed of installing the whole piston motion subassembly of displacement sensor real-time detection on motor active cell, and ECU makes its outburst vibration offset each other through calculating the ignition of its displacement, speed and each jar of mid point integrated control constantly and the course of work, compares with traditional internal-combustion engine, has effectively reduced vibration inertia, and the job stabilization nature is good.
The utility model has the advantages of high thermal efficiency, variable compression ratio, wide fuel adaptability, highest power-weight ratio, lowest discharge capacity and the like; compared with the prior art, the long working stroke can fully burn the fuel oil, the heat efficiency can be improved by about 45%, the loss is controlled to be the minimum value, the fuel consumption is reduced, the harmful emission is reduced under all working conditions, the exhaust temperature is low, the NOX emission can be reduced by 30-40%, the content of noble metals in exhaust aftertreatment equipment is saved, and the part cost is reduced. The structure is simple, and the response is fast; the device not only can be used for charging the new energy automobile when the electric quantity of the electric automobile is insufficient, solves the problem of mileage anxiety of the electric automobile, but also can be used in the fields of mobile power supplies, various instruments, trains, ships, portable power generation equipment and the like.
About the utility model discloses what the concrete structure need explain, the utility model discloses a each part module connection relation each other is definite, realizable, except that the special explanation in the embodiment, its specific connection relation can bring corresponding technological effect to based on do not rely on under the prerequisite of corresponding software program execution, solve the utility model provides a technical problem, the utility model provides a model, the connection mode of parts, module, specific components and parts that appear all belong to the prior art such as the published patent that technical staff can acquire before the application day, published journal paper, or common general knowledge, need not to describe in detail for the technical scheme that the present case provided is clear, complete, realizable, and can be according to this technical means or obtain corresponding entity product.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention.
Claims (2)
1. A free piston linear power generation device comprises a cylinder (1), and is characterized in that: one end of the cylinder (1) is provided with an electromagnetic driving valve (2), a spark plug (3) and an oil injector (4), and the other end of the cylinder (1) is connected with a generator cavity (5);
a piston (6) is arranged in a cylinder body of the cylinder (1), the piston (6) is connected with a rotor magnetic yoke (8) arranged in a generator chamber (5) through a push rod (7), and the outer surface of the rotor magnetic yoke (8) is provided with a rotor magnetic pole (9);
a stator core (10) is arranged on the inner wall of the generator cavity (5), and a winding (11) is arranged on the stator core (10);
the extension end of the push rod (7) is connected with a motor rotor (12), a displacement sensor (13) is further arranged on the motor rotor (12), and the motor rotor (12) is connected with a linear motor (14);
the control ends of the electromagnetic driving valve (2), the spark plug (3), the oil injector (4), the displacement sensor (13) and the linear motor (14) are connected with a controller (15) arranged in a control chamber through conducting wires, the power output end of the stator core (10) is connected with an electric energy storage module (16), and a power converter is further arranged in the electric energy storage module (16);
and the power output end of the electric energy storage module (16) is respectively connected with the linear motor (14) and the controller (15).
2. A free piston linear power plant according to claim 1, characterized in that: the model of a control chip used in the controller (15) is STM32F405RGT 6;
the type of the displacement sensor (13) is CZ 891;
the linear motor (14) is BZD-181N in model.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020268607.9U CN212202242U (en) | 2020-03-06 | 2020-03-06 | Free piston type linear power generation device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020268607.9U CN212202242U (en) | 2020-03-06 | 2020-03-06 | Free piston type linear power generation device |
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| CN212202242U true CN212202242U (en) | 2020-12-22 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202020268607.9U Active CN212202242U (en) | 2020-03-06 | 2020-03-06 | Free piston type linear power generation device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111322155A (en) * | 2020-03-06 | 2020-06-23 | 山西成功汽车制造有限公司 | Free piston type linear power generation device and power generation method thereof |
| CN112879154A (en) * | 2021-01-12 | 2021-06-01 | 重庆科技学院 | Single-acting hydraulic type internal combustion engine linear power generation device |
-
2020
- 2020-03-06 CN CN202020268607.9U patent/CN212202242U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111322155A (en) * | 2020-03-06 | 2020-06-23 | 山西成功汽车制造有限公司 | Free piston type linear power generation device and power generation method thereof |
| CN112879154A (en) * | 2021-01-12 | 2021-06-01 | 重庆科技学院 | Single-acting hydraulic type internal combustion engine linear power generation device |
| CN112879154B (en) * | 2021-01-12 | 2022-05-17 | 重庆科技学院 | Single-acting hydraulic type internal combustion engine linear power generation device |
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