RU2545258C1 - Method of recirculation of exhaust gases to outside combustion chamber of free piston with opposite pistons movement power modules connected with pistons of gas compressor - Google Patents

Abstract

FIELD: machine building.

SUBSTANCE: method includes control system, piston with work and compression cavities, outside combustion chamber and exhaust gases overflow valve from work cavity of the power module piston to the compression cavity. The control cavity tracks the current pressure of the combustion products entering the work cavity of the power module piston, and based on this value the control system opens and closes the exhaust gas overflow valve, from the work cavity of the piston the exhaust gases via the overflow valve enter the compression cavity of the piston, are mixed with the compressed air, and produced mixture of air and exhaust gases via the check valve is supplied to the outside combustion chamber of the free piston with pistons opposite movement power module connected with pistons of the gas compressor, respectively by this method via the overflow valves of the exhaust gases the later overflows to the outside combustion chamber in the rest cylinders of the power module connected with pistons of the gas compressor.

EFFECT: reduced toxicity of the spent gases under mode of partial loads.

1 dwg

Description

FIELD OF TECHNOLOGY

The invention relates to the field of power engineering.

BACKGROUND

The closest prototype of the claimed invention is "Free-piston twin-cylinder with a common external combustion chamber and a linear electric generator dual-purpose power module", patent 2468224.

Summary of the patent 2468224: The invention relates to the field of power engineering. A dual-piston free-piston with a common external combustion chamber and a linear electric generator, a dual-purpose energy module includes a common external combustion chamber, two piston expansion machines, a linear electric generator and a control system. The energy module converts the exothermic energy of motor fuel into electricity in one mode and into the energy of a gaseous working fluid with high temperature and pressure in another. A valve is used to transfer the energy module from one mode to another. In the closed position of the valve, the energy module acts as an electric generator. In the open position - as a gas generator and an electric generator. The invention provides the conversion of exothermic energy of motor fuel into electricity and into the energy of a gaseous working fluid with high pressure and temperature parameters for driving expansion machines.

OBJECT OF THE INVENTION

From the abstract of the analogue it is seen that the exhaust gas recirculation to the combustion chamber in the power module are not used. The purpose of the invention is to reduce the toxicity of exhaust gases (content of nitrogen oxides NOx) in the mode of partial loads on the energy module bypass exhaust.

SUMMARY OF THE INVENTION

The method of exhaust gas recirculation to the external free-piston combustion chamber with the opposite movement of the pistons of the energy module, connected to the pistons of the gas compression compressor, is as follows.

The compressor control system delivers fuel to the external combustion chamber 1 (see Fig., The control system is not shown) by the nozzle 2 and ignites the spark plug 3. The combustion products from the combustion chamber 1 through pipeline 4 through the inlet valve 5 enter the right (as shown) cavity the piston 6 and through the inlet valve 7 into the left cavity of the piston 8. Under the action of incoming combustion products, the pistons begin to diverge. Since the area of the right surface of the piston 6 is greater than the area of its left surface by the difference in the cross-sectional area of the rods 9 and 10, the pressure of the air compressed in the left cavity of the piston 6 will be greater than the pressure of the combustion products in its right cavity. Therefore, air from the left cavity of the piston 6 through the non-return valve 11 through a pipe 12 is supplied to the external combustion chamber 1. The next dose of fuel is injected there by the nozzle 2. At the same time, air is drawn into the right cavity of the piston 14 from the atmosphere through a non-return valve 13, and air (hereinafter exhausted combustion products) is released into the atmosphere from its left cavity through an exhaust valve 15. Similarly, for the same reasons, when the piston 8 moves, the air compressed in its right-hand cavity through the check valve 16 is piped 12 to the external combustion chamber 1. Through the check valve 17, air is sucked into the left-hand cavity of the piston 18 from the atmosphere, and from the right-hand cavity through the exhaust valve 19 air (hereinafter exhaust combustion products) are released into the atmosphere. After the pistons reach the extreme points of divergence, the control system translates the intake valves 5, 7, 20, 21 and exhaust valves 15, 19, 22, 23 into opposite positions. Now, the combustion products from the external combustion chamber 1 through the pipe 4 through the inlet valve 20 enter the left cavity of the piston 14 and through the inlet valve 21 into the right cavity of the piston 18, and the pistons begin to converge. Through the check valves 24 and 25, the air compressed in the right-hand cavity of the piston 14 and in the left-hand cavity of the piston 18 passes through a pipe 12 to the external combustion chamber 1. The next dose of fuel is injected there by the nozzle 2. Through the check valves 26 and 27, air is drawn in from the atmosphere into the left cavity of the piston 6 and the right cavity of the piston 8. From the right cavity of the piston 6 through the exhaust valve 22 and from the left cavity of the piston 8 through the exhaust valve 23, the exhaust combustion products are released into the atmosphere. Compressed gas in the left cavity of the piston 28 through the exhaust valve 29 through a pipe 30 enters the radiator 31, where it is cooled, and then from there to the receiver 32, and through the check valve 33 the gas from the source of compressible gas is sucked into its right cavity. At the same time, when the pistons 6, 7, 14, 18 diverge in the cavities of the pistons 28, 34 connected to them, various gases are compressed - the main function of the compressor. Accordingly, the gas compressed in the right cavity of the piston 34 through the exhaust valve 35 also passes through the pipe 30 to the radiator 31, where it is cooled, and then from there to the receiver 32, and through the check valve 36, the gas from the source of the compressed gas is sucked into its left cavity. When the pistons reach the extreme points of divergence, the control system translates the exhaust valves 29, 35, 37, 38 into opposite positions. Now, the gas compressed in the right cavity of the piston 28 through the exhaust valve 37 through a pipe 30 enters the radiator 31, where it is cooled, and then from there to the receiver 32, and through the check valve 39, the gas from the source of compressible gas is sucked into its left cavity. The gas compressed in the left cavity of the piston 34 through the exhaust valve 38 also passes through the pipe 30 to the radiator 31, where it is cooled, and then from there to the receiver 32, and through the check valve 40, the gas from the source of compressible gas is sucked into its right cavity. Thus compressed in the compressor gas from the receiver 32 through the pipe 41 is supplied to the consumer.

Gas exchange processes in both cylinders of the energy module proceed according to one scenario, therefore, an explanation of the principle of transferring exhaust gases to the external combustion chamber 1 is given on the example of the left cylinder. In the initial position, the pistons 6, 14, 28 are at the left extreme point of movement. The control system opens the intake valve 20 and the combustion products through the pipeline 4 through the intake valve 20 enter the left working cavity of the piston 14 and the pistons 6, 7, 14, 28 move from left to right. At the same time, the control system monitors the current pressure value of the combustion products entering the working cavity of the piston 14 and, in accordance with the load on the compressor energy module, determines the time of opening of the exhaust bypass valve 42. When the pistons 6, 7, 14, 28 move from right to left through the check valve 13 from Atmosphere air begins to be sucked into its right compressor cavity. The control system at a certain point in time opens the exhaust gas bypass valve 42. Exhaust gases coming through it from the working left cavity of the piston 14 into its right cavity, the exhaust gases are mixed there with the air coming in through the check valve 13. As a result, the mixture of air and exhaust gases through the check valve 24 is supplied to the external combustion chamber 1. In the same way, when the pistons 6, 7.14 and pistons 18 28, 34 oppositely move, the exhaust gases are bypassed to the external combustion chamber 1 in both cylinders bypass valves exhaust gases 42, 43, 44, 45.

SUMMARY OF THE INVENTION

A method of recirculating exhaust gases into an external free-piston combustion chamber with opposed movement of the pistons of the energy module, connected to the pistons of the gas compression compressor, including a control system, a piston with working and compressor cavities, an external combustion chamber and an exhaust gas bypass valve from the working cavity of the power module piston to the compressor cavity, characterized in that the control system monitors the current pressure value coming into the working cavity of the piston of the energy module of the combustion products and based on With this value, the control system opens and closes the exhaust gas bypass valve, from the piston working cavity exhaust gases pass through the exhaust gas bypass valve into the compressor cavity, are mixed there with compressed air, and the resulting mixture of air and exhaust gases is supplied to the external chamber through the non-return valve combustion of a free-piston with the opposite movement of the pistons of the energy module connected to the pistons of the gas compression compressor, respectively, in the same way through the exhaust bypass valves Of the exhaust gases, the exhaust gases are transferred to the external combustion chamber in the remaining free-piston cylinders with the opposed movement of the pistons of the energy module connected to the pistons of the gas compression compressor.

TECHNICAL APPLICABILITY OF THE INVENTION

The costs of R&D and production of the claimed invention cannot differ significantly from those in the design and development of classical compressors.

GRAPHIC MATERIAL

Figure. Schematic diagram of a free piston with opposed movement of the pistons of the energy module connected to the pistons of a gas compression compressor.

1 - external combustion chamber; 2 - nozzle; 3 - spark plug; 4, 12, 30, 41 - pipeline; 5, 7, 20, 21 - inlet valve; 6, 8, 14, 18, 28, 34 — piston; 9, 10 - stock; 11, 13, 16, 17, 24, 25, 26, 27, 33, 36, 39, 40 - non-return valve; 15, 19, 22, 23, 29, 35, 37, 38 - exhaust valve; 31 - a radiator; 32 - receiver; 42, 43, 44, 45 - exhaust gas bypass valve.

Claims (1)

A method of recirculating exhaust gases into an external free-piston combustion chamber with opposed movement of the pistons of the energy module, connected to the pistons of the gas compression compressor, including a control system, a piston with working and compressor cavities, an external combustion chamber and an exhaust gas bypass valve from the working cavity of the power module piston to the compressor cavity, characterized in that the control system monitors the current pressure value coming into the working cavity of the piston of the energy module of the combustion products and based on With this value, the control system opens and closes the exhaust gas bypass valve, from the piston working cavity exhaust gases pass through the exhaust gas bypass valve into the compressor cavity, are mixed there with compressed air, and the resulting mixture of air and exhaust gases is supplied to the external chamber through the non-return valve combustion of a free-piston with the opposite movement of the pistons of the energy module connected to the pistons of the gas compression compressor, respectively, in the same way through the exhaust bypass valves Of the exhaust gases, the exhaust gases are transferred to the external combustion chamber in the remaining free-piston cylinders with the opposed movement of the pistons of the energy module connected to the pistons of the gas compression compressor.