30 results about "Free-piston linear generator" patented technology

The invention relates to a hydraulic high-speed free piston linear generator and belongs to the field of energy power. The hydraulic high-speed free piston linear generator mainly comprises a free piston internal combustion engine, a hydraulic transmission mechanism and a linear generator, wherein the hydraulic transmission mechanism comprises a first hydraulic piston, a first hydraulic cavity, afirst hydraulic pump, a high-pressure oil pipe, a second hydraulic cavity, a second hydraulic piston and a second hydraulic pump; the connection relation in the hydraulic transmission mechanism is that: the first hydraulic piston is arranged in the first hydraulic pump, the second hydraulic piston is arranged in the second hydraulic pump, and the first hydraulic pump is communicated with the second hydraulic pump through the high-pressure oil pipe, so that the hydraulic transmission mechanism is formed; two free pistons of the internal combustion engine and the first hydraulic piston form a piston component through connecting rods; and an active cell of the linear generator is connected with the second hydraulic piston through another connecting rod. By adopting the hydraulic transmissionmechanism, the cutting speed of a motor active cell is increased and the working efficiency is improved; and the speed of the motor active cell is n times higher than the motion speed of the piston.

The invention discloses a quasi-free piston linear generator set, which solves the problems that the existing power free piston engine has complex structure and unreliable work, etc. The invention has the advantages of simple structure, convenient application, good reliability of work, etc. The structure of the invention comprises at least a generation unit and a corresponding fuel supply and air inlet and exhaust system; the generation unit is a linkage generation unit which is formed by a group of a cylinder and a piston which are matched with each other and correspondingly motion linearly; the rotor of the generator is connected with the motion part of the linkage generation unit; the stator and the winding of the generator are connected with the fixed part of the linkage generation unit; meanwhile, the motion end point of the linkage generation unit is provided with a retaining part which is used for restraining the stroke of the motion part; the stator and the winding of the generator can be taken as the output terminal of the power.

The invention relates to a high-speed free piston linear generator and belongs to the field of energy power. The high-speed free piston linear generator mainly comprises a free piston internal combustion engine, a gear transmission mechanism and a linear generator, wherein the gear transmission mechanism is formed by coaxially connecting two gears; two free pistons of the internal combustion engine are fixedly connected with each other through a rack-type connecting rod to form a piston component; and a rack on the piston component is connected with an active cell of the linear generator through the matched gear transmission mechanism. Inner parts of two cylinders of the internal combustion engine are combusted respectively to push the pistons to do linear motion; the pistons are connected with a motor active cell through the gear transmission mechanism with a function of increasing the speed, so that the linear motion speed of the motor active cell is finally increased by using gas explosion pressure produced by combustion of each cylinder of the internal combustion engine through the connecting rod and the transmission mechanism. In the high-speed free piston linear generator, the gear transmission mechanism is adopted, so that the cutting speed of the motor active cell is increased and the working efficiency is improved; and the speed of the motor active cell is n times higher than the motion speed of the piston.

The invention relates to a dead point controlled free piston internal combustion linear generator, belonging to the field of energy power. The dead point controlled free piston internal combustion linear generator mainly comprises free piston internal combustion engines, linear generators, a disc control mechanism and a connecting rod; a connection relation among the components is as follows: thefree piston internal combustion engines are sequentially connected with the linear generators to form free piston linear generators; two free piston linear generators are symmetrically arranged on a straight line passing through the circle center of a disc, and the disc is connected with an electromotor through a shaft; the disc is excavated with a motion trough-line in advance, and the trough-line is coincident with the curve shape of one motion cycle of a piston; an internal trough-line of the disc is in contact with and connected with the connecting rod of a free piston engine to play roles in free piston resetting and upper dead point controlling. The dead point controlled free piston internal combustion linear generator disclosed by the invention makes use of the disc control device,thereby achieving the purpose of controlling a dead point of the piston. The disc has high balancing property and good stability during working, and therefore synchronous operation of multiple cylinders can be realized.

Provided is a small sized light linear generator system having a two-stroke free piston engine, comprising a cylinder having an induction chamber and a combustion chamber, a motor rack arranged at one end of the cylinder, an outer stator fixed inside the motor rack, an inner stator fixed inside the motor rack and having a gap with the outer stator, a rotor carrying out straight reciprocating motion along the gap formed by the outer stator and the inner stator, a magnet installed upon the rotor, a plurality of helical compressing springs arranged inside the motor rack, used for supporting the reciprocating motion of the rotor, and leading to the resonance motion of the rotor, a piston arranged inside the cylinder, connected with rotor for carrying out reciprocating motion, and compressing the fuel and air inside the combustion chamber, a snifter valve arranged upon the cylinder and used for providing fuel and air for the interior of the induction chamber, an induction flow path communicating the induction chamber and the combustion chamber, and an exhaust port arranged upon the cylinder. With the above technical scheme, the free piston linear generator is likely to operate under resonance state, thereby improving the generating efficiency and output power.

The embodiment of the invention discloses a stable working method of a combined type free piston linear generator. The combined type free piston generator comprises an auxiliary motor coaxially connected with the generator, and the method comprises the steps that when the combined type free piston generator is started, dragging force needed when a piston moves to a next top dead center position iscalculated, and the requirement for the dragging force is met by controlling the input voltage of the auxiliary motor; in the operation process, the electric energy needed when the piston reaches thenext top dead center position is determined, the input voltage of the generator or the auxiliary motor is controlled, and the electric energy requirement is met. With the assistance of the auxiliarymotor, stable operation of the free piston linear generator can be guaranteed, meanwhile, the generator only needs to be responsible for power generation, conversion between a power generation mode and an electric mode is not needed, and the problem that the working mode conversion response time of a generator in an existing free piston linear generator is long is solved.

The invention discloses a free piston linear electric generator. The free piston linear electric generator comprises electric permanent magnets arranged at the two ends inside an air cylinder and a single body permanent magnet piston arranged in the middle of the air cylinder. The air cylinder is divided into an A air cylinder segment and a B air cylinder segment independently through the single body permanent magnet piston. Each air cylinder segment is provided with one or more air inlet pipes, air exhaust pipes, heat lead-out devices and pressure spring valves. The air exhaust pipes and the heat lead-out devices are connected with a heat absorption refrigerator. The heat absorption refrigerator is connected with a compressed air tank device. The compressed air tank device is connected with an air inlet device. The air inlet device is connected with the air cylinder segments. The single body permanent magnet piston reciprocates left and right in the A air cylinder segment and the B air cylinder segment under the action of repulsive force generated when the magnetic pole of the single body permanent magnet piston and the magnetic poles of the electric permanent magnets are the same and air pressure resultant force and cuts magnetic induction lines to produce induced currents. An electronic control unit and the air cylinder segments of the electric generator are provided with temperature sensors and pressure sensors and connected with the temperature sensors and the pressure sensors which are used for accurately controlling the compression ratio and work rate of the piston.

A renewable energy free piston type linear generator, using the repulsive potential energy of the same polarity of NdFeB permanent magnets to replace a method, method and structure for the explosion of cylinder oil to push the piston to move, including electric permanent magnets installed at both ends of the cylinder The magnet and the central permanent magnet double-headed piston divide the cylinder into two independent A and B segmented cylinders. The electric permanent magnet becomes the rebound mechanism, and the intake and exhaust manifolds are equipped with turbocharging devices for permanent magnet double-headed The piston runs at idle speed and at the top dead center, under the action of the repulsive potential energy of the double-headed piston of the permanent magnet and the magnetic pole of the electropermanent magnet and the combined force of the air pressure, the left and right reciprocating motions in the A and B segmented cylinders cut the magnetic induction line to generate an induced current. Electricity and heat.

The invention discloses an ignition control method for a spark ignition type free piston linear generator, and belongs to the field of energy power. As the piston movement laws, in the starting process and the generation process, of the spark ignition type free piston linear generator are different, the control method disclosed in the invention comprises the following steps: 1, controlling an ignition system to carry out ignition by adopting real-time piston displacement information in the starting process; and 2, controlling the ignition system to carry out ignition by adopting real-time piston displacement and speed information in the generation process. The ignition control method has the technical effect of respectively presetting ignition threshold values to carry out ignition according to the piston movement laws in the starting process and the generation process of the spark ignition type free piston linear generator, so as to ensure the stable continuous operation of the spark ignition type free piston linear generator and improve the output efficiency of an internal combustion engine. Moreover, the ignition control method does not need other auxiliary systems and can realize ignition control through software programming, so that the ignition control is not influenced by the piston stop change and the gas mixtures can be ignited during each circulation.

The invention relates to a free piston linear generator solar thermal power generation system and method with a heat storage function. The free piston linear generator solar thermal power generation system comprises a solar thermal collector, a working medium side outlet of the solar thermal collector is divided into two paths, one path is connected with a valve c, the other path is connected witha valve d, the valve c is connected with an energy storage system, an outlet of the energy storage system is connected with an inlet of a valve e, the outlet of the valve e and the outlet of the valve d are converged and then connected with the free piston linear generator, an exhaust port of the free piston linear generator is connected with a condenser, the outlet of the energy storage system is connected with the inlet of the valve f, the outlet of the valve f and the outlet of the condenser are converged and then connected with the inlet of a liquid storage device, the outlet of the liquid storage device is divided into two paths, one path is connected with the inlet of the valve a, the outlet of the valve a is connected with the inlet of the solar thermal collector, the other path ofthe outlet of the liquid storage device is connected with the inlet of the valve b, and the outlet of the valve b is connected with the inlet of the low-temperature side of the energy storage system.The system and method have the advantages of high efficiency, low cost and wide working range.

The invention provides a free piston linear generator matching optimization method based on an engine, and belongs to a new energy automobile range extender, the method comprises the following steps: pre-selecting an engine with rated power P1, linear motor power P2 and mover mass m2, P2 = P1; determining the total mass m = m1 + m2 of the system, and determining the output power P actual of the system according to the total mass m; determining whether the following condition is satisfied: |(Pactual-P1) / P1|<=N; if (Pactual-P1) / P1<(-N), reducing the mover mass m2 of the motor, determining the output power P'actual of the system under the optimal mover total mass, reselecting the engine according to the P 'actual, matching new engine power P' 1, and repeating the process; if (P actual-P1) / P1>N, increasing the rotor mass m2 of the motor, determining the system output power P'actual under the optimal rotor total mass, reselecting the engine according to the P 'actual, matching new engine power P' 1, and then repeating the process.

The invention provides a simulation analysis method and system for motion characteristic of a free piston linear generator. The method comprises the steps of building an FPLG mover motion characteristic simulation model based on a dynamics principle according to the stress characteristics of an FPLG system, analyzing a model parameter setting method according to the structure and working principle of the FPLG system, analyzing the loading conditions of the motion characteristic simulation of different working conditions, and finally, researching a result extraction and analysis method. According to the method, the problems of high cost and difficult implementation of the current FPLG experiment can be effectively solved, the motion characteristics of the FPLG system, the parameters influencing the motion characteristics and the influence rule can be obtained through analysis of the simulation method, and the calculation process is rapid and convenient.

The invention relates to a lubricant additive for a free-piston-type linear power generator and a preparation method of the lubricant additive. The lubricant additive comprises a metal detergent, an ashless dispersant and a phenol ashless antioxidant. The preparation method comprises the steps that the metal detergent, the ashless dispersant and the phenol ashless antioxidant are weighed accordingto the ratio, then mixed at the temperature of 70-90 DEG C and fully stirred for 2-3 hours till the metal detergent, the ashless dispersant and the phenol ashless antioxidant are uniformly stirred. Lubricant prepared by utilizing the additive can meet the lubricating requirement of the free-piston-type linear power generator and has the characteristics of low ash content, excellent piston detergency performance and good lubricating performance.

The invention discloses a power improvement device of a free piston linear generator. The power improvement device of the free piston linear generator comprises a power part. The power part comprisesan air cylinder body, a cylinder cover, a spark plug, an oil injector, a piston and a piston rod. The spark plug is installed on the cylinder cover, the oil injector is installed on the air cylinder body, the piston is arranged in the air cylinder body, and the piston rod is connected to the piston. The power improvement device of the free piston linear generator further comprises a stator part and a rotor part. The stator part comprises a generator stator. The rotor part comprises a generator rotor, a rotor mandrel and springs. The generator rotor cooperates with the generator stator, and therotor mandrel is connected with the generator rotor and connected with the piston rod. One end of each spring is connected with the generator stator, and the other end of each spring is connected with the piston rod. One end of each spring is connected to the generator stator, so that the position fixing is guaranteed; and the other end of each spring is connected with the piston rod, and stretches out and draws back along with the movement of the piston rod, so that the effect of energy storage is achieved. The rigidity of the corresponding springs is obtained through calculation and simulation, the springs which provide the corresponding frequencies can be obtained, and therefore the free piston linear generator can achieve the high frequency, and the advantage of the free piston lineargenerator can be fully achieved.

The invention provides a control method and system for the top dead center position of a free piston linear generator. A relation MAP graph of a rotor and the top dead center position is obtained based on the corresponding relation between the movement speed of the rotor at a certain position before the top dead center position and the ignition moment when the FPLG rotor can move to the top dead center position; and according to the MAP graph and the actual speed of the rotor at a certain position before the top dead center position or the deviation between the actual speed and the target speed, the optimal ignition moment is calculated through interpolation, an engine spark plug is controlled to ignite according to the optimal ignition moment based on the optimal ignition moment, it is guaranteed that the actual top dead center position where the rotor can reach is close to the set top dead center position, and accordingly, the stable operation of the FPLG is ensured. According to thedisclosed technical scheme, the generator load is adjusted according to the real-time combustion condition, the rotor can reach the position near the designed top dead center, the rotor speed monitoring at a certain position in front of the top dead center is combined, and the next optimal ignition moment is determined according to the actual speed and the target speed difference at the position;and accordingly, it is guaranteed that a piston can more stably run to the next top dead center, the position fluctuation of the top dead center is smaller, and stable running of the FPLG is furtherrealized.

The invention relates to a dead point controlled free piston internal combustion linear generator, belonging to the field of energy power. The dead point controlled free piston internal combustion linear generator mainly comprises free piston internal combustion engines, linear generators, a disc control mechanism and a connecting rod; a connection relation among the components is as follows: the free piston internal combustion engines are sequentially connected with the linear generators to form free piston linear generators; two free piston linear generators are symmetrically arranged on a straight line passing through the circle center of a disc, and the disc is connected with an electromotor through a shaft; the disc is excavated with a motion trough-line in advance, and the trough-line is coincident with the curve shape of one motion cycle of a piston; an internal trough-line of the disc is in contact with and connected with the connecting rod of a free piston engine to play roles in free piston resetting and upper dead point controlling. The dead point controlled free piston internal combustion linear generator disclosed by the invention makes use of the disc control device, thereby achieving the purpose of controlling a dead point of the piston. The disc has high balancing property and good stability during working, and therefore synchronous operation of multiple cylinders can be realized.

The invention relates to a high-speed free piston linear generator and belongs to the field of energy power. The high-speed free piston linear generator mainly comprises a free piston internal combustion engine, a gear transmission mechanism and a linear generator, wherein the gear transmission mechanism is formed by coaxially connecting two gears; two free pistons of the internal combustion engine are fixedly connected with each other through a rack-type connecting rod to form a piston component; and a rack on the piston component is connected with an active cell of the linear generator through the matched gear transmission mechanism. Inner parts of two cylinders of the internal combustion engine are combusted respectively to push the pistons to do linear motion; the pistons are connected with a motor active cell through the gear transmission mechanism with a function of increasing the speed, so that the linear motion speed of the motor active cell is finally increased by using gas explosion pressure produced by combustion of each cylinder of the internal combustion engine through the connecting rod and the transmission mechanism. In the high-speed free piston linear generator, the gear transmission mechanism is adopted, so that the cutting speed of the motor active cell is increased and the working efficiency is improved; and the speed of the motor active cell is n times higher than the motion speed of the piston.

The invention discloses a double-winding free piston linear generator and a control method. The double-winding free piston linear generator comprises a power part and a linear motor, and a first winding and a second winding are reversely and symmetrically arranged in a stator slot of the linear motor to form a double-winding linear motor. The double windings are arranged on a linear motor stator,so that the mass of a system rotor is not increased, and therefore the working frequency of the system is not reduced; and meanwhile, the problem of dragging force direction change when a single-winding free piston linear generator is started can be solved, and the problem of time conversion of a motor from a power generation mode to an electric working mode in case of fire is solved.

Provided is a small sized light linear generator system having a two-stroke free piston engine, comprising a cylinder having an induction chamber and a combustion chamber, a motor rack arranged at one end of the cylinder, an outer stator fixed inside the motor rack, an inner stator fixed inside the motor rack and having a gap with the outer stator, a rotor carrying out straight reciprocating motion along the gap formed by the outer stator and the inner stator, a magnet installed upon the rotor, a plurality of helical compressing springs arranged inside the motor rack, used for supporting the reciprocating motion of the rotor, and leading to the resonance motion of the rotor, a piston arranged inside the cylinder, connected with rotor for carrying out reciprocating motion, and compressing the fuel and air inside the combustion chamber, a snifter valve arranged upon the cylinder and used for providing fuel and air for the interior of the induction chamber, an induction flow path communicating the induction chamber and the combustion chamber, and an exhaust port arranged upon the cylinder. With the above technical scheme, the free piston linear generator is likely to operate under resonance state, thereby improving the generating efficiency and output power.

The invention relates to a free piston linear generator based on waste heat utilization and belongs to the technical field of energy power. The free piston linear generator specifically comprises a free piston combustion engine, the linear generator and a waste gas expansion cylinder. The free piston combustion engine comprises an oil atomizer, a gas inlet, a gas outlet, a piston and a combustion engine cylinder. The linear generator comprises a motor stator and a motor rotor. A waste gas utilizing assembly comprises a gas guiding pipe, a gas inlet door, a gas outlet door, a reset piston, a reset cylinder and a water sprayer. A working process includes a starting process and a steady operation process. In a cold start-up process, a linear engine works in a motor mode and drives a device to be started and work. In the steady operation process, the linear generator works in a generator mode, the combustion engine works to drive the linear generator to do work and generate power, then a moving assembly returns to a top dead center through a waste gas waste heat utilization method, and next circulation movement is conducted. The free piston linear generator has the advantages of being capable of protecting environment and saving energy.

The invention discloses a back-mounted dual-piston-type free piston linear generator of a symmetric structure. The back-mounted dual-piston-type free piston linear generator comprises a generator body, two two-stroke engines, a first auxiliary motor and a second auxiliary motor; the first auxiliary motor and the second auxiliary motor are symmetrically arranged on the two axial sides of the generator body, the first auxiliary motor and the second auxiliary motor are connected with the generator body, the first auxiliary motor and the second auxiliary motor are connected with the two-stroke engines, each two-stroke engine comprises an air cylinder body, a cylinder cover, a sparking plug, an oil atomizer, a piston, a crankcase set and a connecting rod, the first auxiliary motor, the second auxiliary motor and the generator body are coaxially arranged, the generator body, the first auxiliary motor and the second auxiliary motor are connected, a preset axial distance is set between the twoclosest windings of a generator stator, a preset axial distance is set between the two closest windings of a first auxiliary motor stator, and a preset axial distance is set between the two closest windings of a second auxiliary motor stator. The problem that the motor working mode switching response time is long is solved, and it is ensured that a piston reaches the designated position smoothlyso that the free piston linear generator can be operated stably.

The invention belongs to the technical field of power control, and provides a free piston linear generator power adjusting device and method based on voltage adjustment. The free piston linear generator power adjusting device based on voltage adjustment comprises a current control unit and an output control unit. The current control unit is used for obtaining the segmented control condition of thegenerator, the magnitude of each segment of current and the action time according to the external output power requirement and the relationship between the electromagnetic force and the magnitude ofcurrent, and calculating the voltage required in a segmented control interval according to the relationship between the voltage of the generator and the current; and one end of the output control unitis connected with the power supply of the generator, and the output control unit outputs the voltage required in each segmented control interval based on the Boost principle and applies the voltage to a motor. According to the free piston linear generator power adjusting device, the required voltage is obtained by utilizing the current rate, so that the purpose of quickly adjusting the power of the generator is achieved.

The invention discloses a power improvement device of a free piston linear generator. The power improvement device of the free piston linear generator comprises a power part. The power part comprisesan air cylinder body, a cylinder cover, a spark plug, an oil injector, a piston and a piston rod. The spark plug is installed on the cylinder cover, the oil injector is installed on the air cylinder body, the piston is arranged in the air cylinder body, and the piston rod is connected to the piston. The power improvement device of the free piston linear generator further comprises a stator part and a rotor part. The stator part comprises a generator stator. The rotor part comprises a generator rotor, a rotor mandrel and springs. The generator rotor cooperates with the generator stator, and therotor mandrel is connected with the generator rotor and connected with the piston rod. One end of each spring is connected with the generator stator, and the other end of each spring is connected with the piston rod. One end of each spring is connected to the generator stator, so that the position fixing is guaranteed; and the other end of each spring is connected with the piston rod, and stretches out and draws back along with the movement of the piston rod, so that the effect of energy storage is achieved. The rigidity of the corresponding springs is obtained through calculation and simulation, the springs which provide the corresponding frequencies can be obtained, and therefore the free piston linear generator can achieve the high frequency, and the advantage of the free piston lineargenerator can be fully achieved.

The invention provides a control method and system for improving the frequency and power of a free piston linear generator. The method comprises the steps that the movement of a rotor from an upper dead center position at one side to an upper dead center position at the other side is divided into an acceleration section and a deceleration section, wherein the sum of the stroke length of the acceleration section of the rotor and the stroke length of the deceleration section of the rotor is a fixed value; in the acceleration section, the electromagnetic load is resistance, and by reducing the electromagnetic load of a motor, the acceleration of the rotor in the stage is increased and the stroke time of the acceleration section is shortened; and in the deceleration section, the electromagnetic load is controlled to enable the rotor to finish the action of reducing a certain motion speed to zero in the stroke of the section, so that the time of the deceleration section is shortened. On thebasis of sectional control over the size and waveform of the electromagnetic load, under the condition that other conditions are not changed, (1) the working frequency is improved, and then the system output power is improved; and (2) the output power and the working frequency of the system are adjusted according to load requirements, throttle-valve-free control is realized, and the pumping lossis reduced.

The invention discloses a photovoltaic, heat storage and photo-thermal combined solar power generation system and method. The system comprises a solar photovoltaic panel, wherein a liquid cooler of the solar photovoltaic panel is connected with a solar heat collector, the solar heat collector is connected with a valve b, the valve b is connected with an energy storage system, the energy storage system is connected with a valve c, the valve c is connected with a liquid storage device, an outlet of the liquid storage device is divided into two paths, one path is connected with an inlet of the valve a, an outlet of the valve a is connected with an inlet of the liquid cooler of the solar photovoltaic panel, the other path is connected with an inlet of a valve d, an outlet of the valve d is connected with the energy storage system, the energy storage system is connected with an inlet of a valve e, an outlet of the valve e is connected with an inlet of a free piston linear generator, an outlet of the free piston linear generator is connected with an inlet of a condenser, and an outlet of the condenser is connected with an inlet of the liquid storage device after meeting with an outlet ofthe valve c. According to the system, the efficiency of the solar photovoltaic panel is improved, and continuous power generation can be realized.

The invention relates to a free-piston linear generator lubricating oil additive and a preparation method thereof. Additives include metal detergents, ashless dispersants and phenolic ashless antioxidants. The preparation method is to weigh the metal detergent, the ashless dispersant and the phenolic ashless antioxidant in proportion, then mix them at a temperature of 70°C-90°C, and fully stir them for 2-3 hours until they are evenly stirred. The lubricating oil prepared by using this additive can meet the lubricating requirements of the free-piston linear generator under harsh conditions, and has the characteristics of low ash content, excellent piston cleaning performance and good lubricating performance.