KR101045872B1 - Rotary heat engine - Google Patents

Abstract

A thermally efficient rotary heat engine is disclosed that follows an intermediate form between an ideal heat cycle Carnot engine and a Stirling engine. The rotary heat engine includes a cylinder in which a working gas is accommodated, a high temperature heating part for heating the front end of the cylinder to thermally expand the working gas, a low temperature cooling part for cooling the rear end of the cylinder to shrink the working gas, and a thermal expansion and contraction of the working gas. And a piston which is stored inside the cylinder so as to linearly reciprocate and whose opening is formed so that the working gas is in direct contact with the high temperature heating part or the low temperature cooling part, and a starting part which converts the linear reciprocating motion of the piston into a rotational motion to generate rotational power. It can be configured to include.

Rotary Heat Engine, Heat Engine, Cylinder, Piston, Carnot, Stirling

Description

ROTARY HEAT ENGINE

TECHNICAL FIELD The present invention relates to a heat engine, and more particularly to a rotary heat engine that follows an intermediate form of an ideal heat cycle Carnot engine and a Stirling engine.

The Carnot engine is an ideal thermal efficiency engine with no heat loss, and practically all engines cannot exceed the thermal efficiency of the Carnot engine. Unlike general internal combustion engines, external combustion engines exhibit high thermal efficiency, among which a Stirling engine has a high thermal efficiency similar to that of the Carnot cycle and has low vibration and noise.

The Stirling engine is an external combustion engine that seals an operating gas such as hydrogen or helium in a space consisting of a cylinder and a piston and moves the piston up and down to obtain mechanical energy by heating and cooling the operating gas from the outside through heat exchange. It is a kind.

However, the stirling engine as described above has a problem that it is used only in a very limited field due to the difficulty of maintenance because the overall device is large and the structure is complex, the production cost is high and requires a high technical level.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object thereof is to provide a rotary heat engine having high thermal efficiency while similarly following a heat cycle between a carno engine and a stirling engine.

Another object of the present invention is to provide a rotary heat engine that is simple in structure and low in manufacturing cost and easy to maintain, unlike a conventional complex stirling engine.

The objects of the present invention are not limited to the above-mentioned objects, and other objects not mentioned can be clearly understood by those skilled in the art from the following description.

A rotary heat engine according to an embodiment of the present invention for achieving the above object is a cylinder in which an operating gas is accommodated, a high temperature heating unit for heating the front end of the cylinder to thermally expand the working gas, and cooling the rear end of the cylinder. And a low temperature cooling unit for contracting the working gas, the inside of the cylinder being linearly reciprocated by thermal expansion and contraction of the working gas, and an opening for direct contact with the high temperature heating part or the low temperature cooling part. It may be configured to include a piston to be formed, and a starting unit for generating a rotational power by converting the linear reciprocating motion of the piston into a rotary motion.

In addition, the cylinder is preferably a heat insulating portion formed between the high temperature heating portion and the low temperature cooling portion.

In addition, the cylinder may have a cylinder head portion coupled to seal the front end portion of the cylinder by a fastening means.

In addition, it is preferable that the cylinder head portion guides the opening to be located at the high temperature heating portion when the actuator gas is fully contracted.

In addition, the cylinder head portion is provided with a protrusion formed on one surface facing the piston to provide a space spaced from the inner diameter of the cylinder to form a guide groove into which the front end portion of the piston is inserted.

In addition, the high temperature heating portion and the low temperature cooling portion is preferably provided in a ring shape on the outer peripheral surface of the cylinder.

Further, according to the first embodiment of the high temperature heating unit, it may include a combustion chamber disposed in the outer diameter of the front end portion of the cylinder, and a fuel supply unit for supplying fuel to the combustion chamber.

Further, according to the second embodiment of the high temperature heating unit, it may include a hot wire member wound around the outer diameter of the front end portion of the cylinder, and a power supply unit for supplying electricity to the hot wire member.

In addition, according to the third embodiment of the high temperature heating unit, a solar light condensing module for condensing sunlight, and the solar light condensed by the solar light collecting module is formed in the front end portion of the cylinder to be irradiated toward the working gas It may include a light transmission window.

In addition, according to the first embodiment of the low temperature cooling unit, it may include a cooling fin formed in the outer diameter of the rear end of the cylinder, and a cooling fan for supplying air to the cooling fin to cool.

In addition, according to the second embodiment of the low temperature cooling unit, it may include a cooling tube wound on the outer diameter of the rear end of the cylinder, and a cooling pump for supplying cooling water to the cooling tube.

In addition, the piston has an open surface such that the protrusion of the cylinder head portion is inserted into the front end of the piston.

In addition, a plurality of the openings may be formed along the outer diameter behind the front end of the piston.

In addition, the front end portion of the piston is preferably formed of a heat insulating material.

In addition, it is preferable that at least one piston ring is provided at an outer diameter of the piston to seal between the cylinder and the piston.

In addition, the starter may include a crankshaft for generating rotational power to the rotating body, and a connecting rod connecting the piston and the crankshaft and transmitting power according to a linear reciprocating motion of the piston to the crankshaft.

Specific details of other embodiments are included in the detailed description and the drawings.

According to the rotary heat engine of the present invention as described above has one or more of the following effects.

First, by following a new thermal cycle formed by heating and cooling in direct contact with external high temperature heating and low temperature cooling units, more specifically, the thermal cycle of the intermediate form between the Carnot engine and the Stirling engine, High thermal efficiency such as can be expected.

Second, it is possible to obtain the required power by only having a high temperature heating unit for supplying an external heat source and a low temperature cooling unit for cooling it without the need for complicated valves. That is, since the operating gas is in contact with the high and low temperature alternately in the opening of the piston by the reciprocating motion of the piston to complete the heat cycle, it is made of a much simpler structure, unlike the conventional sterling engine that must move to the high and low temperature parts This is easy.

Third, the air tight structure in which the free piston vibrates in the closed cylinder makes it easy to operate with a high-pressure gas, thereby obtaining a high output density per volume.

Fourth, unlike an internal combustion engine in which the lubricating oil in the cylinder is deteriorated because the external combustion engine uses an external heat source, the lubricating oil is almost permanent. In addition, since the lubrication zone is inside the cold zone, various lubricants can be used.

The effects of the present invention are not limited to the above-mentioned effects, and other effects not mentioned will be clearly understood by those skilled in the art from the description of the claims.

Advantages and features of the present invention, and methods for achieving them will be apparent with reference to the embodiments described below in detail in conjunction with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but can be implemented in various different forms, only the embodiments are to make the disclosure of the present invention complete, and the general knowledge in the art to which the present invention belongs It is provided to fully convey the scope of the invention to those skilled in the art, and the present invention is defined only by the scope of the claims. Like reference numerals refer to like elements throughout.

Hereinafter, a rotating heat engine according to a preferred embodiment of the present invention with reference to the accompanying drawings will be described in detail. In the following description, well-known functions or constructions are not described in detail to avoid unnecessarily obscuring the subject matter of the present invention.

1 is a schematic view showing the configuration of a rotary heat engine according to an embodiment of the present invention, Figure 2 is a perspective view showing the main portion of the rotary heat engine of the present invention, Figure 3 is a cross-sectional view taken along line III-III of FIG. 4 is an exploded perspective view of a cylinder in the rotary heat engine of the present invention, FIG. 5 is a sectional view showing the configuration of the cylinder, FIG. 6 is an exploded perspective view of a piston in the rotary heat engine of the present invention, and FIG. It is a cross-sectional view showing.

As shown in Figures 1 to 7, the rotary heat engine 10 according to an embodiment of the present invention is a cylinder 100, piston 200, high temperature heating unit 300, low temperature cooling unit 400 and the starting unit 500 and the like.

The cylinder 100 is formed in a cylindrical shape, and an operating gas such as hydrogen or helium is accommodated therein. In addition, the carbon black in the form of particulates is mixed in the working gas to increase the absorption power of the heat energy transferred from the high temperature heating unit 300 to be described later to increase the heat transfer effect on the working gas.

The cylinder 100 has fastening means such as bolts 125 and rivets so that the front end 111 of the cylinder body 110 is opened, and the open face 111a of the front end 111 of the cylinder body 110 is sealed. The cylinder head 120 is coupled by welding. Here, a plurality of bolt holes 122 are formed in the front end 111 of the cylinder body 110 for fastening and fixing the bolt 125.

The cylinder head part 120 may include a head cover 121 and a protrusion 123.

The head cover 121 is formed of a disc having a predetermined thickness and has a diameter equal to or larger than that of the front end 111 of the cylinder body 110, and has a bolt hole 112 of the front end 111 of the cylinder body 110. A plurality of bolt holes 122 are formed along the edges to correspond to the edges thereof, and are coupled to the front end 111 of the cylinder body 110 by the bolt 125 or the like. At this time, between the head cover 121 and the front end 111 of the cylinder body 110 is provided with a circular sealing member 130, for example, rubber packing is sealed to prevent the working gas inside the cylinder 100 to leak outside Can improve. The sealing member 130 has a circular hollow portion 130a formed at the center thereof so that the protrusion 123 of the cylinder head 120 can be inserted therein, and the bolt hole 132 can penetrate the bolt 125 at the edge thereof. ) May be formed.

The protrusion 123 protrudes in a cylindrical shape so as to face the piston 200 on one surface of the head cover 121 and is inserted into the open surface 111a of the front end 111 of the cylinder body 110. The protrusion 123 provides a space that is spaced apart from the inner diameter of the front end 111 of the cylinder body 110, preferably a separation space G corresponding to the wall thickness of the front end 211 of the piston 200. The front end portion 211 of the tone 200 forms a guide groove 124 is inserted. In this case, the length of the protrusion 123, that is, the length of the guide groove 124 is such that the opening 212 of the piston 200 is located at the high temperature heating part 300 when the minimum volume of the working gas is compressed by the maximum vibration. It is preferable to form substantially the same as the length from the front end of the piston 200 to the front end of the opening 212.

The cylinder 100 has an opening surface 113a formed at the rear end 113 so that the piston 200 can be inserted into the cylinder 100.

The cylinder 100 may have a heat insulating part 140 to shield heat between the high temperature heating part 300 and the low temperature cooling part 400 which will be described later. For example, the cylinder body 110 is entirely made of stainless steel, and the heat insulating part 140 between the high temperature heating part 300 and the low temperature cooling part 400 is made of ceramic, silica ( silica) and the like.

The cylinder 100 is coupled to the crankcase 513 to be described later to the rear end 113 of the cylinder body 110.

The piston 200 is accommodated in the cylinder body 110 to linearly reciprocate by thermal expansion and contraction of the working gas sealed between the cylinder 100 and the piston 200. In the present exemplary embodiment, the configuration in which the free piston 200 is applied is illustrated, but is not limited thereto and may include various types of pistons.

The piston 200 is formed in a cylindrical shape in which the piston body 210 has a diameter corresponding to the inner diameter of the cylinder body 110, the front end portion 211 of the piston body 210 is made of a low thermal conductivity metal or ceramic, etc. It is preferably formed of a heat insulating material.

The piston 200 has an opening surface 211a formed so that the protrusion 123 of the cylinder head 120 is inserted into the front end portion 211 of the piston body 210, and from the rear portion of the opening 212 to be described later. It has a shape in which the inside is sealed. In addition, the piston 200 is preferably provided with a heat insulating member 219 in the rear portion of the opening (212).

The piston 200 has an opening 212 formed so that the working gas directly contacts the high temperature heating part 300 or the low temperature cooling part 400. Preferably, a plurality of openings 212 may be formed along the outer diameter of the front end portion 211 of the piston body 210. The opening 212 may be formed in various shapes such as a circle and a rectangle.

The front end 211 of the piston body 210 has a thickness corresponding to the gap G of the guide groove 124 formed between the inner wall of the cylinder body 110 and the protrusion 123 of the cylinder head 120. It is preferred to have t). In addition, the front end portion 211 of the piston body 210 is a length that blocks the operation gas in contact with the high temperature heating unit 300 when the maximum optimum of the operating gas, that is, the vibration width of the piston 200 is the maximum. It is preferably formed. For example, in the present embodiment, when the lengths of the three regions of the high temperature heating part 300, the heat insulating part 140, and the low temperature cooling part 400 are the same, the cylinder head part 120 may have a length sufficient to cover the same. It is preferable that the protrusion 123 has a length substantially equal to the length of the guide groove 124.

The piston 200 may be provided with at least one piston ring 220 in the outer diameter of the rear end portion 213 of the piston body 210 so that the portion in contact with the inner wall of the cylinder body 110 is sealed. To this end, the outer diameter of the piston body 210 is preferably provided with at least one in the piston ring seating groove 215 that can be fixed by seating the piston ring 220. Since the piston ring 220 is located inside the low temperature cooling unit 400 of the cylinder 100 during the linear reciprocation of the piston 200, a material operating in a low temperature region such as Teflon ring may be used. In the present embodiment, but the configuration for applying the piston ring 220, but not limited to this, instead of the piston ring 220 may be arranged in the vertical bearing form a fixed ring on the inner wall of the cylinder body (110).

The piston 200 is coupled to the rear end 213 of the piston body 210 by one end 521 of the connecting rod 520 to be described later by the hinge 521a.

The high temperature heating unit 300 is a high temperature unit for thermally expanding the working gas by heating the front end 111 of the cylinder 100. The high temperature heating unit 300 is made of a metal material that is good heat transfer, may be provided in the ring shape on the outer peripheral surface of the cylinder 100, it is not limited to this can be selected in various embodiments.

The high temperature heating unit 300 may heat the front end 111 of the cylinder 100 by using thermal energy of combustion, heat transfer or sunlight.

For example, as illustrated in FIG. 8A, the high temperature heating unit 310 may heat the front end 111 of the cylinder 100 using thermal energy by combustion. To this end, the high temperature heating unit 310 is a combustion chamber 311 which is arranged in a ring shape on the outer diameter of the front end portion 111 of the cylinder body 110, and supplies the fuel to the combustion chamber 311 through the fuel pipe 313. The fuel supply unit 312 may be provided. In addition, a plurality of burners 311a are disposed in the combustion chamber 311, and an air pipe 315 for injecting air into the combustion chamber 311 and an exhaust pipe 317 for discharging the combustion gas may be provided. Can be.

In addition, as illustrated in FIG. 8B, the high temperature heating unit 320 may heat the front end 111 of the cylinder 100 by using thermal energy by heat transfer. To this end, the high temperature heating unit 320 is arranged in a ring shape on the outer diameter of the front end portion 111 of the cylinder body 110 and the heat transfer chamber 321 and a plurality of heating wire member 321a is wound therein, the heating wire member 321a ) May be provided with a power supply unit 322 for supplying electricity.

 In addition, as illustrated in FIG. 8C, the high temperature heating unit 330 may heat the front end 111 of the cylinder 100 by using thermal energy caused by concentrated solar light. To this end, the high temperature heating unit 330 is a solar light concentrating module 331 for condensing sunlight and the front end portion of the cylinder 100 so that the sunlight condensed from the solar light concentrating module 331 is irradiated toward the working gas. The light transmission window 332 formed on the 111 may be provided. The solar light concentrating module 331 includes refractive type light condensing the sun by using a lens such as a magnifying glass to condense to one point, and reflection light condensing by condensing the light to one point by using a mirror of a curved surface. Compared to the condensing method, the reflective condensing method as shown in FIG. 8C can condense more dense solar light. The reflective condensing method can be configured in various ways depending on the number and shape of the reflection.

In this embodiment, the high-temperature heating unit 310, 320, 330 in the form of providing combustion, heat transfer or sunlight as a heat source, but not limited to this, it is possible to select a variety of embodiments. That is, the high temperature heating unit 300 may include all types of heat sources capable of maintaining a higher temperature than the surroundings, including the low temperature cooling unit 400.

The low temperature cooling unit 400 is a low temperature unit for contracting the working gas by cooling the rear end 113 of the cylinder 100. The low temperature cooling unit 400 may be provided in a ring shape on the outer circumferential surface of the cylinder body 110, but is not limited thereto and may be selected in various embodiments.

For example, as illustrated in FIG. 9A, the low temperature cooling unit 410 supplies air to the cooling fins 411 and the cooling fins 411 formed at the outer diameter of the rear end 113 of the cylinder 100. It may be configured in the form of air-cooled cooling, including the cooling fan 412 to cool. Here, the cooling fin 411 is preferably formed in the concave-convex shape in order to increase the area in contact with the atmosphere so that the cooling can be made more quickly under the atmosphere.

In addition, as shown in FIG. 9B, the low temperature cooling unit 420 is disposed in a ring shape at the outer end 1130 of the cylinder 100 and has a cooling chamber 421 having a plurality of cooling tubes 421a wound therein. It may be configured in the form of water-cooled cooling, including a cooling pump 422 for supplying cooling water to the cooling tube (421a).

The starter 500 is a component that generates rotational power by converting a linear reciprocating motion of the piston into a rotational motion, and the crankcase 513, the crankshaft 510, the connecting rod 520, the flywheel 530, and the like. It can be provided.

Crank case (513) is connected to the open surface (113a) of the rear end 113 of the cylinder 100, the crankshaft 510, crank support member (not shown) and other cranks to be described later inside A predetermined space is provided to accommodate parts (not shown) and the like.

The crankshaft 510 converts the linear reciprocating motion of the piston 200 into a rotational motion. The crankshaft 510 is rotatably supported by a crank support member in the crankcase 513 to be rotated (not shown). For example, rotational power is generated at the wheels of the vehicle. The crankshaft 510 may convert the linear reciprocating motion of the piston 200 transmitted from the connecting rod 520 to be rotated into the rotary motion while performing a circular motion having the length of the crank arm 511 as a radius. As shown in FIG. 1, in a rotary heat engine including a plurality of cylinders 100, the crank arms 511 are formed to be shifted by different angles.

The connecting rod 520 is a component that transmits the power according to the linear reciprocating motion of the piston 200 to the crankshaft 510. The connecting rod 520 has one end 521 coupled to the hinge 521a including a bearing at the lower end 213 of the piston 200, and the other end 522 is connected to the crank arm 511 of the crank shaft 510. Including a bearing is coupled to the hinge 522a. Since the connecting rod 520 is subjected to shrinkage and tensile load, the connecting rod 520 should be of sufficient thickness to be able to cope with it, and should be formed of sufficient length to smoothly transmit power. It is preferable that the length of the connecting rod 520 is usually 3 to 4 times the length of the crank arm 511.

The flywheel 530 is a wheel having a large moment of inertia coupled to the crankshaft 510 and fastened to the nut 531 in order to maintain a uniform rotation speed of the crankshaft 510.

10 and 11, the operation of the rotary heat engine according to an embodiment of the present invention will be described in detail.

10A to 10D are exemplary views for sequentially explaining the operation of the rotary heat engine according to the present invention, and FIG. 11 is a graph showing the thermodynamic cycle of the rotary heat engine according to the present invention.

First, as shown in FIG. 10A, the piston 200 moves upwards so that the front end portion 211 of the piston 200 is formed between the inner wall of the cylinder 100 and the cylinder head portion 120. When the piston 200 is moved until it is inserted into the cylinder, i.e., until the working gas sealed in the space between the cylinder 100 and the piston 200 is at a minimum volume, the opening 212 of the piston 200 is moved to the cylinder. It is located in the high temperature heating unit 300 of (100). At this time, the connecting rod 520 moves upward in association with the rise of the piston 200, and the crank arm 511 of the crank shaft 510 connected to the connecting rod 520 is positioned upward at 12 o'clock. Done. That is, when the piston 200 is raised to the maximum to minimize the volume of the working gas, the connecting rods 520 are positioned in a straight line with each other in a phase in which the crank arm 511 of the crank shaft 510 is upward. In addition, the working gas is in a state of high temperature heat contraction while absorbing thermal energy Q4 from the high temperature heating unit 300 while directly contacting the high temperature heating unit 300 through the opening 212 (4-> ① high temperature heat contraction in FIG. 11A). process). This process is not the same as the heat cycle of the Carnot and Stirling engines, but is close to it. The heat transfer between the high temperature heating part 300 and the cold temperature part 400 is shielded by the heat insulating part 140 provided between the high temperature heating part 300 and the cold temperature part 400.

Next, as shown in FIG. 10B, as the thermal energy Q1 is continuously absorbed from the high temperature heating part 300 to the working gas inside the cylinder 100, the molecules of the working gas become active in molecular motion and the movement speed thereof is increased. Will increase. The number of times the molecules of the working gas collide with the inner wall of the cylinder 100 is increased in response to the molecular motion, so that in the case of volumetric fixed it increases to the pressure in the volume. This pressure pushes the piston 200 installed inside the cylinder 100 downwards to perform high temperature thermal expansion (1-> ② high temperature thermal expansion process in Fig. 11A). At this time, the connecting rod 520 moves downward in conjunction with the lowering of the piston 200 and further rotates the crank arm 511 hinged to the other end 522 of the connecting rod 520 in a clockwise direction on the drawing. As a result, the crankshaft 510 is further rotated. This process is the same as the heat cycle of Carnot and Stirling engines.

Next, as shown in FIG. 10C, when the piston 200 moves downwards and the working gas reaches the maximum volume, the opening 212 of the piston 200 is positioned in the low temperature cooling part 400, and the operation is performed. The gas is directly in contact with the low temperature cooling unit 400 through the opening 212, while cooling and expanding at a low temperature, a part of the internal thermal energy Q2 is discharged outward (② ′-> ③ low temperature cooling expansion process of FIG. 11A). At this time, the connecting rod 520 is moved to the maximum in conjunction with the maximum descending of the piston 200 and the crank arm 511 hinged to the other end 522 of the connecting rod 520 in the clockwise direction 6 in the drawing As the crankshaft 510 rotates further, the crankshaft 510 rotates further. That is, when the piston 200 descends to the maximum to maximize the volume of the working gas, the connecting rods 520 are positioned in a line with each other in a phase where the crank arm 511 of the crank shaft 510 is downward. This process is not the same as the heat cycle of the Carnot and Stirling engines, but is close to it.

Next, as shown in FIG. 10D, the expanded working gas until the maximum volume is cooled and contracted while the high temperature heating unit 300 is blocked and only the low temperature cooling unit 400 comes into contact with the piston 200 to move upward. As it moves, heat energy (Q3) inside the working gas is discharged outward (③-> ④ `low temperature cooling shrinkage expansion process of Figure 11a). At this time, the connecting rod 520 moves upward in association with the rise of the piston 200 and further rotates the crank arm 511 hinged to the other end 522 of the connecting rod 520 in a clockwise direction on the drawing. As a result, the crankshaft 510 is further rotated. This process is the same as the heat cycle of Carnot and Stirling engines.

If the axial length of the cylinder 100 including the thermal insulation portion 140 between the high temperature heating portion 300 and the low temperature cooling portion 400 is longer than the length of the opening 212 of the piston 200, the adiabatic is instantaneous. Section (a process of ②-> ②`, ④`-> ④ in FIG. 11a), and the overall heat cycle of ①-> ②-> ②`-> ③-> ④`-> ④-> ① of FIG. The cycle of the process is completed. If the axial length of the cylinder 100 including the heat insulating part 140 between the high temperature heating part 300 and the low temperature cooling part 400 is equal to the length of the opening 212 of the piston 200, there is no heat insulating section (②). = ②`, ④ = ④`) Follow the ideal heat cycle as shown in Fig. 11B. If the axial length of the cylinder 100 including the thermal insulation portion 140 between the high temperature heating portion 300 and the low temperature cooling portion 400 is shorter than the length of the opening 212 of the piston 200, the opening 212 is hot. Since the heating unit 300 and the low temperature cooling unit 400 are brought into contact at the same time, the heating and cooling of the working gas occur at the same time, resulting in a similar effect to the adiabatic effect. > ③-> ④`-> ④-> A cycle similar to the process of ① is completed (not shown).

As described above, the rotary heat engine according to the present invention seals an operating gas such as hydrogen or helium in a space formed by the cylinder 100 and the piston 200, and heats and cools the same in an external process such as FIGS. 10A to 10D. While repeating this, the working gas is thermally expanded or contracted to linearly reciprocate the piston 200. In addition, the linear reciprocating motion of the piston 200 is converted to rotational motion by the starter 500 composed of the crankshaft 510, the connecting rod 520, and the like to generate rotational power. Based on this, the thermal efficiency of the rotary heat engine according to the present invention is as shown in Equation 1 below.

As shown in Equation 1, the rotary heat engine according to the present invention is an external combustion engine, and thus high thermal efficiency can be expected since it is almost similar to an intermediate form between an ideal heat cycle carnot engine and a stirling engine.

Although embodiments of the present invention have been described above with reference to the accompanying drawings, those skilled in the art to which the present invention pertains may implement the present invention in other specific forms without changing the technical spirit or essential features thereof. I can understand that. Therefore, it should be understood that the embodiments described above are exemplary in all respects and not restrictive. The scope of the present invention is shown by the following claims rather than the detailed description, and all changes or modifications derived from the meaning and scope of the claims and their equivalent concepts are included in the scope of the present invention. Should be.

1 is a schematic diagram showing the configuration of a rotary heat engine according to an embodiment of the present invention.

Figure 2 is a perspective view showing the main portion of the rotary heat engine of the present invention.

3 is a cross-sectional view taken along the line A-A of FIG.

Figure 4 is an exploded perspective view of the cylinder in the rotary heat engine of the present invention.

5 is a cross-sectional view showing the configuration of a cylinder.

6 is an exploded perspective view of a piston in the rotary heat engine of the present invention.

7 is a cross-sectional view showing the configuration of a piston.

8A is a perspective view of principal parts showing a first embodiment of a high temperature heating part of a rotary heat engine of the present invention;

FIG. 8B is a perspective view illustrating main parts of a second embodiment of the high temperature heating unit in the rotary heat engine of the present invention. FIG.

8C is a perspective view illustrating main parts of a third embodiment of the high temperature heating unit in the rotary heat engine of the present invention.

FIG. 9A is a perspective view illustrating main parts of a first embodiment of the low temperature cooling unit in the rotary heat engine of the present invention. FIG.

9B is a perspective view illustrating main parts of a second embodiment of the low temperature cooling unit in the rotary heat engine according to the present invention.

10A to 10D are exemplary views for sequentially explaining the operation of the rotary heat engine according to the present invention.

11a and 11b are graphs showing the thermodynamic cycle of a rotating heat engine according to the invention.

<Description of Symbols for Main Parts of Drawings>

10: rotary heat engine 100: cylinder

110: cylinder body 120: cylinder head portion

121: head cover 123: protrusion

124: guide groove 140: heat insulation

200: piston 210: piston body

212 opening 220 piston ring

300,310,320,330: High temperature heating part 400,410,420: Low temperature cooling part

500: starting unit 510: crankshaft

520: connecting rod 530: flywheel

Claims (11)

A cylinder in which the working gas is received; A high temperature heating unit for heating the front end of the cylinder to thermally expand the working gas; A low temperature cooling unit cooling the rear end of the cylinder to shrink the working gas; The hollow body is accommodated in the cylinder so as to linearly reciprocate by thermal expansion and contraction of the working gas, and a hollow part which is opened forward is formed at the front end, and the working gas is formed at the outer circumferential surface of the front end of the high temperature heating part or the low temperature cooling part. A piston having an opening formed in direct contact with the piston; And A rotary heat engine comprising a starter for generating a rotational power by converting the linear reciprocating motion of the piston into a rotary motion. The method of claim 1, The cylinder is a rotary heat engine, characterized in that the heat insulating portion is formed between the high temperature heating portion and the low temperature cooling portion. The method of claim 1, And the cylinder has a cylinder head portion coupled to seal the front end portion of the cylinder by fastening means. The method of claim 3, wherein The cylinder head portion is a rotary heat engine, characterized in that the projection is formed on one surface facing the piston to provide a space spaced from the inner diameter of the cylinder to form a guide groove into which the front end portion of the piston is inserted. The method of claim 1, The high temperature heating unit and the low temperature cooling unit is a rotary heat engine, characterized in that provided in a ring shape on the outer peripheral surface of the cylinder. The method of claim 1, wherein the high temperature heating unit, A combustion chamber disposed at an outer diameter of the front end portion of the cylinder; And A rotary heat engine comprising a fuel supply unit for supplying fuel to the combustion chamber. The method of claim 1, wherein the high temperature heating unit, A heating wire member wound around the outer diameter of the front end portion of the cylinder; And Rotary heat engine comprising a power supply for supplying electricity to the heating element. The method of claim 1, wherein the high temperature heating unit, A solar light collecting module for condensing sunlight; And And a light transmission window formed at a front end portion of the cylinder to irradiate the solar light collected by the solar light collecting module toward the working gas. The method of claim 1, wherein the low temperature cooling unit, Cooling fins formed on the outer diameter of the rear end of the cylinder; And Rotary heat engine comprising a cooling fan for supplying air to the cooling fins. The method of claim 1, wherein the low temperature cooling unit, A cooling tube wound around an outer diameter of the rear end of the cylinder; And A rotary heat engine comprising a cooling pump for supplying cooling water to the cooling tube. The method of claim 1, wherein the starting unit,  A crankshaft for generating rotational power to the rotating body; And And a connecting rod connecting the piston to the crankshaft and transmitting power to the crankshaft according to a linear reciprocating motion of the piston.

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