An electric flame heated Stirling engine

Abstract

The invention discloses an electric flame heating Stirling engine, comprising a heating cylinder and a cooling cylinder, a heat exchange channel is connected between the heating cylinder and the cooling cylinder, a first piston is arranged in the heating cylinder, a second piston is arranged in the cooling cylinder, the first piston is connected to the crankshaft through a first piston connecting rod, the second piston is connected to the crankshaft through a second piston connecting rod, a heating chamber is arranged outside the heating cylinder, a cooling chamber is arranged outside the cooling chamber, the bottom of the heating chamber is connected to the bottom of the cooling chamber through an air pipe, an electric flame generator for heating the heating cylinder is arranged at the bottom of the heating chamber, an exhaust port is arranged at the top of the heating chamber, and an air inlet is arranged at the top of the cooling chamber. The invention can automatically clean super-long fin heat exchange tubes, make full use of thermal energy, have high working efficiency, and be clean and environmentally friendly.

Description

Technical Field

[0001] The invention belongs to the technical field of engines, and in particular relates to an electric flame heating Stirling engine. Background Art

[0002] Traditional Stirling engines are generally heated and cooled on both sides of the gas distribution cylinder by heating and cooling devices arranged outside the gas distribution cylinder, and the gas distribution piston in the gas distribution cylinder moves in coordination with the expansion of the heating gas and the contraction of the cooling gas, thereby driving the working piston in the working cylinder to work. In the structure of the Stirling engine of the prior art, in order to avoid the heating and cooling devices affecting the action of the gas distribution cylinder, the heating device and the cooling device are usually arranged on both sides of the outside of the gas distribution cylinder, so that the thermal efficiency is not high. In the prior art, a large part of the reason why the Stirling engine is widely used in automobiles is that its energy conversion efficiency is low. Since the Stirling engine belongs to an external combustion engine, a large part of the heat energy will be taken away by the heat exchange between the ordinary heating method and the air, and most of the heat energy will be lost, and it is not used, and the working efficiency is low. For example, a Stirling engine with good sealing and high thermal efficiency is introduced in Chinese invention patent CN102678384B. It includes a gas distribution cylinder, a gas distribution piston, a heating device and a cooling device, a working cylinder and a working piston; the working piston is sealed with the working cylinder through a piston ring and can slide back and forth; the gas distribution cylinder is connected to the working cylinder through an air flow channel, and the gas distribution piston and the working piston move back and forth synchronously; the air flow channel has two branches, and the two air flow channels lead to the left inner cavity and the right inner cavity of the working cylinder respectively; the right inner cavity is connected to the air flow channel through an exhaust valve, and a touch part opposite to the exhaust valve is arranged on the right side of the working piston. Its advantages are reflected in: reducing energy loss and improving engine efficiency; reducing the sealing difficulty of the moving parts, improving the sealing performance, and reducing the loss of heat energy; producing a leak-proof effect, further improving the sealing effect; reducing the leakage loss of the entire working gas medium, which is also conducive to improving efficiency.

[0003] However, the heating device and the cooling device are two independent systems, both of which require energy from the outside to work, and the energy utilization rate is low. Summary of the invention

[0004] The purpose of the present invention is to provide an electric flame heating Stirling engine which fully utilizes thermal energy, has high working efficiency, and is clean and environmentally friendly.

[0005] The technical solution adopted by the present invention to solve its technical problems is to propose an electric flame heating Stirling engine, including a heating cylinder and a cooling cylinder, the heating cylinder and the cooling cylinder are connected by a heat exchange channel, a first piston is arranged in the heating cylinder, a second piston is arranged in the cooling cylinder, the first piston is connected to the crankshaft through a first piston connecting rod, and the second piston is connected to the crankshaft through a second piston connecting rod, a heating chamber is arranged outside the heating cylinder, a cooling chamber is arranged outside the cooling chamber, the bottom of the heating chamber is connected to the bottom of the cooling chamber through an air pipe, an electric flame generator for heating the heating cylinder is arranged at the bottom of the heating chamber, an exhaust port is arranged at the top of the heating chamber, and an air inlet is arranged at the top of the cooling chamber.

[0006] Furthermore, a portion of the heating cylinder is located in the heating chamber.

[0007] Furthermore, a portion of the cooling cylinder is located in the cooling cavity.

[0008] Furthermore, when the first piston is at a maximum height, the bottom surface of the first piston is higher than the top surface of the heating chamber, and when the second piston is at a maximum height, the bottom surface of the second piston is higher than the top surface of the cooling chamber.

[0009] Furthermore, an air pump is also provided on the air pipe.

[0010] Furthermore, a starter motor is provided at the end of the crankshaft, an output shaft is provided at the end of the crankshaft away from the starter motor, and a controller is provided on the starter motor.

[0011] Furthermore, sealing rings are provided on the first piston and the second piston.

[0012] Furthermore, the first piston is connected to a first piston connecting rod via a first piston shaft, and the second piston is connected to a second piston connecting rod via a second piston shaft.

[0013] Furthermore, the number of the heating cylinder and the number of the cooling cylinder are at least one.

[0014] Furthermore, the number of the heating cylinders and the number of the cooling cylinders are the same.

[0015] Furthermore, the starting motor, the electric flame generator and the air pump are electrically connected.

[0016] The beneficial effects of the present invention are:

[0017] 1. The electric flame heating Stirling engine proposed by the present invention has a heating chamber outside the heating cylinder, a cooling chamber outside the cooling cylinder, an air pipe with an air pump connecting the heating chamber and the cooling chamber, and an electric flame generator is arranged at the connection between the air pipe and the heating chamber. Under the action of the air pump, the outside air enters the cooling chamber and absorbs the heat in the cooling cylinder. The air after absorbing heat is heated by the electric flame generator and enters the heating chamber to heat the heating cylinder, thereby no additional energy consumption is required to dissipate heat for the engine, and the heat emitted by the cooling chamber is used to preheat the air that is about to enter the electric flame heating. High working efficiency.

[0018] 2. Since the electric flame generator is used as the engine heat source to heat the heating cylinder, it is clean and environmentally friendly.

[0019] 3. Since the starter motor is set at the end of the crankshaft, it can assist in starting the engine. At the same time, when the engine needs to slow down, the starter motor intervenes. The starter motor can absorb kinetic energy from the engine to generate electricity and transmit it to the battery for use.

[0020] The purpose of the present invention is to provide an electric flame heating Stirling engine which fully utilizes thermal energy, has high working efficiency, and is clean and environmentally friendly. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The accompanying drawings, which are incorporated into the specification and constitute a part of the specification, illustrate embodiments of the present invention and are used together with the description to explain the principles of the present invention. In these drawings, similar reference numerals are used to represent similar elements. The drawings described below are some embodiments of the present invention, but not all embodiments. For those of ordinary skill in the art, other drawings can be obtained from these drawings without paying creative work.

[0022] Figure 1 This is a schematic structural diagram of an electric flame heating Stirling engine according to an embodiment of the present invention;

[0023] Figure 2 This is a schematic diagram of the piston structure of an electric flame heated Stirling engine according to an embodiment of the present invention;

[0024] In the figure: 1. heating cylinder; 11. heating chamber; 12. first piston; 13. first piston connecting rod; 14. first piston shaft; 15. sealing ring; 2. cooling cylinder; 21. cooling chamber; 22. second piston; 23. second piston connecting rod; 24. second piston shaft; 3. heat exchange channel; 4. air pipe; 41. air pump; 5. air inlet; 6. exhaust port; 7. crankshaft; 71. first shaft portion; 72. second shaft portion; 73. output shaft; 8. electric flame generator; 9. starting motor; 91. controller. DETAILED DESCRIPTION

[0025] In order to more clearly illustrate the embodiments of the present invention and the technical solutions in the prior art, the specific implementation methods of the present invention will be described below with reference to the accompanying drawings. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings and other implementation methods can be obtained based on these drawings without creative work. In addition, the design orientation only represents the relative position relationship between the components, not the absolute position relationship.

[0026] The purpose of the present invention is to provide an electric flame heating Stirling engine, which fully utilizes thermal energy, has high working efficiency, and is clean and environmentally friendly. Figure 1-Figure 2 , mainly including a heating cylinder 1 and a cooling cylinder 2, the heating cylinder 1 and the cooling cylinder 2 are connected by a heat exchange channel 3, a first piston 12 is arranged in the heating cylinder 1, a second piston 22 is arranged in the cooling cylinder 2, the first piston 12 is connected to the crankshaft 7 through a first piston connecting rod 13, and the second piston 22 is connected to the crankshaft 7 through a second piston connecting rod 23, a heating chamber 11 is arranged outside the heating cylinder 1, a cooling chamber 21 is arranged outside the cooling chamber 2, the bottom of the heating chamber 11 is connected to the bottom of the cooling chamber 21 through an air pipe 4, an electric flame generator 8 for heating the heating cylinder 1 is arranged at the bottom of the heating chamber 11, an exhaust port 6 is arranged at the top of the heating chamber 11, and an air inlet 5 is arranged at the top of the cooling chamber 21.

[0027] A portion of the heating cylinder 1 is located in the heating chamber 11, and a portion of the cooling cylinder 2 is located in the cooling chamber 21. When the first piston (12) is at its maximum height, the bottom surface of the first piston (12) is higher than the top surface of the heating chamber (11). When the second piston (22) is at its maximum height, the bottom surface of the second piston (22) is higher than the top surface of the cooling chamber (21). When the first piston 12 moves to the closest position to the crankshaft 7, the first piston (12) is at its maximum height, and the height of the bottom of the first piston 12 is higher than the height of the top of the heating chamber 11. At this position, the first piston 12 is completely located outside the heating chamber 11, and the first piston 12 will not continue to be heated by the heating chamber 11, preventing the first piston 12 from continuously absorbing heat and causing the temperature to be too high, causing the temperature in the heating cylinder 1 to be too high and causing the cylinder to explode. The bottom surface of the second piston 22 is higher than the top surface of the cooling chamber 21, maintaining the same stroke of the second piston 22 and the first piston 12, and the highest point and the lowest point are at the same height. Under the action of the crankshaft 7, the first piston 12 and the second piston 22 move in opposite directions, ensuring the stability of the engine operation.

[0028] An air pump 41 is also provided on the air pipe 4. Under the action of the air pump 41, air enters the cooling chamber 21 from the well gas port 5 to cool the cooling cylinder 2, causing the gas in the cooling cylinder 2 to cool down and shrink, and then passes through the air pipe 4 to be heated by the electric flame generated by the electric flame generator 8, and enters the heating chamber 11 to heat the heating cylinder 1. At the same time, the electric flame generated by the electric flame generator 8 heats the bottom of the heating cylinder 1, causing the gas in the heating cylinder to heat up and expand.

[0029] A starter motor 9 is also provided at the end of the crankshaft 7, and an output shaft 73 is also provided at the end of the crankshaft 7 away from the starter motor 9. The starter motor is provided with a controller 91. The first piston 12 is connected to the first piston connecting rod 13 through the first piston shaft 14, and the second piston 22 is connected to the second piston connecting rod 23 through the second piston shaft 24. A sealing ring 15 is provided on both the first piston 12 and the second piston 22. During operation, the starting motor 9 drives the crankshaft 7 to rotate, and the first piston 12 and the second piston 22 are driven to move through the first piston connecting rod 13 and the second piston connecting rod 23. At the same time, the electric flame generated by the electric flame generator 8 heats the bottom of the heating cylinder 1, and the air heated by the electric flame enters the heating chamber 11 to heat the periphery of the heating cylinder 1, so that the volume of the gas in the heating cylinder 1 expands, and the first piston 12 is pushed to do work. When the first piston 12 moves toward the crankshaft 7 and passes through the heat exchange channel 3, the heating cylinder 1 and the cooling cylinder 2 are connected through the heat exchange channel 3, and the heat in the heating cylinder 1 enters the cooling cylinder 2 through the heat exchange channel. Under the action of the cooling of the cooling cylinder 2, the gas inside the heating cylinder 1 contracts, and the first piston 12 moves away from the crankshaft 7. As a result, the first piston 12 reciprocates in the heating cylinder 1, and the first piston 2 is connected to the first piston connecting rod 13 through the first piston shaft 14. Under the action of the first piston connecting rod, the crankshaft 7 is driven to rotate. Under the action of the crankshaft 7, the second piston connecting rod 23 and the second piston shaft 24, the second piston 22 always moves in the opposite direction to the first piston. Starter motor, electric flame generator and air pump are by electric connection.After engine start, controller 91 closes 9 starter motors.

[0030] There are at least one heating cylinder 1 and one cooling cylinder 2, and the number of heating cylinders 1 and cooling cylinders 2 is always the same. A part of each heating cylinder 1 is located in the heating chamber 11, and a part of each cooling cylinder 2 is located in the cooling chamber 21. A first piston 12 is provided in each heating cylinder 1, and a second piston 22 is provided in each cooling cylinder 2. When the engine power needs to be increased, the power can be increased by increasing the volume of the heating cylinder 1 and the cooling cylinder 2; the engine power can also be increased by increasing the number of the heating cylinder 1 and the cooling cylinder 2.

[0031] The contents described above may be implemented individually or in combination in various ways, and these variations are all within the protection scope of the present invention.

[0032] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the statement "comprise a ..." do not exclude the presence of other identical elements in the process, method, article or device comprising the elements.

[0033] The above contents are further detailed descriptions of the present invention in combination with specific preferred implementation modes, and it cannot be determined that the specific embodiments of the present invention are limited to these descriptions. For ordinary technicians in the technical field to which the present invention belongs, several simple deductions or substitutions can be made without departing from the concept of the present invention, which should be regarded as belonging to the protection scope of the present invention.

Claims

1. An electric flame heated Stirling engine, characterized in that: The invention comprises a heating cylinder (1) and a cooling cylinder (2), wherein a heat exchange channel (3) is provided between the heating cylinder (1) and the cooling cylinder (2), wherein a first piston (12) is provided in the heating cylinder (1), and a second piston (22) is provided in the cooling cylinder (2), wherein the first piston (12) is connected to a crankshaft (7) via a first piston connecting rod (13), and the second piston (22) is connected to the crankshaft (7) via a second piston connecting rod (23), wherein a heating chamber (11) is provided outside the heating cylinder (1), and a cooling chamber (21) is provided outside the cooling cylinder (2), wherein the bottom of the heating chamber (11) is connected to the cooling chamber (21) The bottoms are connected via an air pipe (4); an electric flame generator (8) for heating the heating cylinder (1) is arranged at the bottom of the heating chamber (11); an exhaust port (6) is arranged at the top of the heating chamber (11); and an air inlet (5) is arranged at the top of the cooling chamber (21); when the first piston (12) is at a maximum height, the bottom surface of the first piston (12) is higher than the top surface of the heating chamber (11); when the second piston (22) is at a maximum height, the bottom surface of the second piston (22) is higher than the top surface of the cooling chamber (21); and sealing rings (15) are arranged on both the first piston (12) and the second piston (22).

2. An electric flame heated Stirling engine according to claim 1, characterized in that: A portion of the heating cylinder (1) is located in the heating chamber (11).

3. An electric flame heated Stirling engine according to claim 1, characterized in that: A portion of the cooling cylinder (2) is located in the cooling chamber (21).

4. An electric flame heated Stirling engine according to claim 1, characterized in that: The air pipe (4) is also provided with an air pump (41).

5. The electric flame heated Stirling engine according to claim 1, characterized in that: A starter motor (9) is also provided at the end of the crankshaft (7), an output shaft (73) is also provided at the end of the crankshaft (7) away from the starter motor (9), and a controller (91) is also provided on the starter motor.

6. An electric flame heated Stirling engine according to claim 1, characterized in that: The first piston (12) is connected to a first piston connecting rod (13) via a first piston shaft (14), and the second piston (22) is connected to a second piston connecting rod (23) via a second piston shaft (24).

7. An electric flame heated Stirling engine according to claim 1, characterized in that: The number of the heating cylinder (1) and the number of the cooling cylinder (2) are both at least one.

8. An electric flame heated Stirling engine according to claim 7, characterized in that: The number of the heating cylinders (1) and the number of the cooling cylinders (2) are the same.

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