RU2427717C1 - Impulse method of movement synchronisation of pistons of free piston duplex power module with common combustion chamber - Google Patents

Abstract

FIELD: engines and pumps.

SUBSTANCE: free piston duplex power module with common combustion chamber includes common external combustion chamber and two power modules the symmetry axes of pistons of which are located on one straight line, and pistons of power modules move in opposite phase. Impulse method of movement synchronisation of pistons of duplex power module consists in the fact that control system divides the main impulse of generated electric power of each working cycle of power module into separate impulses of electric power, monitors current values of speeds of pistons of both power modules and generates error signal of speeds of their pistons, in compliance with which it decreases relative impulse duration of that power module the speeds of pistons of which are lower than those of the other power module. When speeds of pistons of both power modules become equal, control system resets the value of impulse relative duration.

EFFECT: increasing specific power.

2 dwg

Description

FIELD TECHNOLOGY

The invention relates to the field of power engineering.

BACKGROUND

The closest analogue of the invention is “A generator based on a free piston engine with an external combustion chamber”, patent 2342546. An generator (hereinafter referred to as an energy module) converts the chemical energy of motor fuel into electricity and operates as follows. When the energy module is launched into the combustion chamber 1 (see Fig. 1), the control system (not shown in Fig. 1) by the nozzle 2 delivers fuel and ignites it with the spark plug 3. The combustion products through the open valve 4 enter the left (Fig. 1) the cavity of the piston 5 and under their influence the piston 5, the armature 7 connected to it by the rod 6 and the piston 8 begin to move from left to right. The area of the left end surface of the piston 5 is greater than the area of its opposite surface by the cross-sectional area of the rod 6. Therefore, the pressure of the air compressed in the right cavity of the piston 5 is greater than the pressure of the combustion products in its left cavity. Therefore, air from the right cavity of the piston 5 through the open valve 9 enters the combustion chamber 1, thereby providing oxygen to the fuel combustion process. At the same time, air from the right piston cavity 8 through the open valve 10 is discharged into the atmosphere (during subsequent working cycles - exhaust gases), and through the open valve 11 air from the atmosphere enters its left cavity. The magnetic flux of the moving armature 7 crosses the turns of the stator coil 12, as a result of which an electric pulse is generated in it. Upon reaching the extreme right position by the pistons, the control system moves the valves 4, 10, 13, 14 to opposite positions. The combustion products from the combustion chamber 1 through the opening valve 13 enter the right cavity of the piston 8. The pistons 5, 8 and the armature 7 begin to move from right to left. Air from the left cavity of the piston 8 closes the valve 11 and enters the combustion chamber 1 through the opening valve 15. The valve 9 closes and air from the atmosphere through the opening valve 16 is sucked into the right cavity of the piston 5, and the exhaust gases are released into the atmosphere through the opening valve 14. The magnetic flux of the armature 7 intersects the turns of the stator coil 12 and an electric pulse of opposite sign is generated in it. In the future, the control system, translating valves 4, 10, 13, 14 from one position to the opposite, provides a constant air supply to the combustion chamber. Anchor 7 oscillates, and electrical impulses are generated in the stator coil 12, the energy of which is directed to the consumer.

SUMMARY OF THE INVENTION

The first-order vibration resulting from the reaction of the movement of the pistons is suppressed by the use of two energy modules with a common combustion chamber, oriented so that the axis of symmetry of the pistons are located on one straight line, and their movement in one way or another is organized in antiphase. It turns out a paired energy module with a common combustion chamber. One of the conditions for the operation of such a machine is the synchronous movement of the pistons in antiphase throughout their path.

It is impossible to make a cylinder and pistons of a machine of absolutely regular geometric shape, and pistons are also impossible to equal in weight. It is also impossible to ensure the equality of the friction forces in the piston-cylinder pairs throughout the entire working cycle. In addition, other factors influence the law of piston motion - unpredictable movement of the machine in space, rotation of the earth, etc. All this causes second-order vibrations. There are several ways to ensure synchronous movement of pistons in antiphase. One of them is the pulsed mode. It consists of the following.

The combustion products from the combustion chamber 1 (Figure 2, another machine) through the pipeline 2 and through the gas distribution valve 3 enter the left (in Figure 2) piston cavity 4 of the left power module 5, and through the pipe 6 and through the gas distribution valve 7 to the right the piston cavity 8 of the right power module 9. Under their influence, the pistons 4, 8 and the magnetization coils of the anchors 10, 11 start oncoming motion. Moreover, in the stator coils 12, 13, the main pulses of electricity are generated, which the control system divides into a group of individual pulses with a certain duty cycle (duty cycle is the ratio of the pulse duration to its period). Separation is carried out by opening the circuit of either the magnetization coil of the armature 10 or armature 11, or the stator coil 12 or the stator coil 13. The control system monitors the current values of the piston speeds of both energy modules and, in case of inequality of the speeds of their pistons, generates a piston speed mismatch signal, according to which the speed is adjusted piston movements. If, for example, the speed of the pistons of the left power module 5 is less than the speed of the pistons of the right power module 9, the control system for the error signal reduces the duty cycle of the pulses of the left power module.

Resistance to its movement decreases (power generation capacity decreases), and the speed of the pistons increases. At the moment when the piston speeds of both energy modules 5 and 9 are equalized, the control system restores the initial duty cycle of the pulses. Similarly, the control system operates if the speed of the pistons of the right power module is less than the speed of the pistons of the left.

Separation of the main impulse of electricity allows us to achieve not only the synchronous movement of the pistons in antiphase. Along the way, the problem of increasing the specific power of the paired energy module as a whole is being solved. It is known that the shorter the electric pulse, the lower the inductance of the circuit is required to obtain its maximum quality factor. Less inductance - less coil mass.

SUMMARY OF THE INVENTION

Pulse synchronization of the movement of the pistons of a twin-piston twin energy module with a common external combustion chamber that converts the chemical energy of motor fuel into electricity, including a common combustion chamber and two energy modules, the axis of symmetry of the pistons of which are located on one straight line and the pistons of the energy modules move in antiphase, characterized in that the control system divides the main pulses of electricity generated by the energy modules into groups of individual pulses of electricity, monitors the current values If the speed of the pistons of both energy modules is not equal, and if the speed of the pistons of the energy modules is not equal, it generates a signal of the discrepancy between the speeds of the pistons of the energy modules, according to which it reduces the duty cycle of the pulses of the energy module whose piston speeds are lower than the piston speeds of the other energy module.

INDUSTRIAL APPLICABILITY

The introduction of pulsed synchronization of piston movement consists in combining two energy modules (patent 2342546 "Electric generator based on a free piston engine with an external combustion chamber") into an aggregate with a common combustion chamber and modernization of the control system. In addition to providing synchronized movement of the pistons of the paired energy module, an increase in its specific power is achieved. The shorter the electrical pulse, the lower the inductance required to obtain the maximum quality factor of the circuit, the smaller the mass of the circuit at the same generated power.

GRAPHIC MATERIAL

Figure 1 - Free piston twin energy module with an external combustion chamber.

1 - combustion chamber; 2, 6 - pipeline; 3, 7 - gas distribution valve; 4, 8 - piston; 5, 9 - power module; 10, 11 - magnetization coil of the armature; 12, 13 - stator coil.

Claims (1)

The pulse method of synchronizing the movement of the pistons of a twin-piston twin energy module with a common external combustion chamber that converts the chemical energy of motor fuel into electricity, including a common combustion chamber and two energy modules, the axis of symmetry of the pistons of which are located on one straight line, and the pistons of the energy modules move in antiphase, characterized in that the control system divides into groups of individual pulses of electricity the main pulses of electricity generated by the energy modules, monitors the current Suitable values of the velocities of the pistons of both power module in the case of inequality of values of velocity of the pistons power module generates the error signal speeds pistons power module, in accordance with which reduces the duty cycle of the power module, the piston velocity which is less than the velocity of the pistons of another power module.

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