CN210422770U - Piston rotating heat engine - Google Patents

Abstract

The utility model overcomes the defects of the prior art, provides a heat engine with a rotary piston, the stroke motion can be designed, the sealing cost is low, and the vibration basically disappears; in order to solve the technical problem, the utility model discloses a technical scheme be: the piston is arranged in the cylinder in a matching mode, the guide groove is designed on the cylinder, the fixed rod is installed on the piston, or the guide groove is designed on the piston, the fixed rod is installed on the cylinder, the guide rod is in contact with the guide groove and limits the moving mode of the piston in the cylinder, and the piston can reciprocate and rotate circularly relative to the cylinder. The utility model discloses but wide application in heat engine field.

Description

Piston rotating heat engine

Technical Field

The utility model relates to a rotatory heat engine of piston belongs to heat engine technical field.

Background

The heat engine is a machine which utilizes internal energy to do work and comprises an internal combustion engine, an external combustion engine, a steam engine and the like. The most widely used internal combustion engines are heat engines of piston-cylinder construction, as are most vehicle engines, and also rotary engines, as represented by motorcade, which do not have a reciprocating piston structure. The external combustion engine adopting the piston structure includes a stirling engine and the like, and an aircraft engine can be regarded as a heat engine.

In a traditional piston-cylinder engine, a crank connecting rod is adopted, a certain pressure exists between a piston and a cylinder wall to generate abrasion, a larger gap is required to be reserved between the cylinder wall and the piston, a piston ring is additionally arranged, the vibration is difficult to overcome due to the fact that the moving integral mass center of the crank connecting rod moves along a curve, the compression stroke ratio and the acting stroke ratio are generally 1:1, combustion is generally optimal only in a certain range of rotating speed, and all the reason is that all strokes of a crank-piston structure cannot be designed. The rotor engine of the motor has the defects of difficult sealing technology, curved movement of the center of mass of the rotor and vibration. The aircraft engine is always a high-power, high-fuel consumption, but low-efficiency engine, which is also of great importance in relation to its structure. The Stirling engine is excellent in an external combustion engine, and has the problems caused by a crank connecting rod, high heat energy loss, high sealing cost and the like.

In summary, the existing heat engines have the defects that the motion process of each stroke cannot be designed, the sealing technology is difficult to be costly, and the vibration is difficult to be completely eliminated, which directly influences the actual thermal efficiency and performance of the heat engine.

SUMMERY OF THE UTILITY MODEL

The utility model overcomes prior art exists not enough, provides a rotatory heat engine of piston, and the stroke motion can design, and is sealed with low costs moreover, and vibrations can be eliminated basically.

In order to solve the technical problem, the utility model discloses a technical scheme be: the utility model provides a rotatory heat engine of piston, includes cylinder, piston, guide way and decides the pole, its characterized in that: the piston is arranged in the cylinder in a matching mode, the guide groove is designed on the cylinder, the fixed rod is arranged on the piston, or the guide groove is designed on the piston, the fixed rod is arranged on the cylinder, the fixed rod is in contact with the guide groove and limits the moving mode of the piston in the cylinder, and the piston can reciprocate and rotate relative to the cylinder.

The number of the guide channels can be one or more; the guide channel is designed according to different requirements, each stroke corresponds to a section of curve or linear guide channel, two or more strokes are a cycle period, and the piston rotates for one circle relative to the cylinder for at least two cycle periods; the number of the fixed rods which are contacted with the same surface of one guide channel is equal to the number of the cycle periods; the guide channel has a main guide channel and an auxiliary guide channel, the force borne by the main guide channel and the auxiliary guide channel is opposite to the component force direction of the piston rotating shaft direction, the positions of the main guide channel and the auxiliary guide channel and the corresponding fixed rod jointly determine the free gap of the piston moving in the cylinder, and the proper free gap can ensure that the piston is not blocked in the movement of the cylinder and the collision between the fixed rod and the guide channel can not be generated.

The working cavity of the cylinder is formed by one or more concentric circular cylinders or annular cylinders, and the piston is of an integrated structure matched with the cylinder. Adopt the utility model discloses a heat engine, its working chamber can be traditional cylinder also can be annular cylinder, can be a chamber also can be a plurality of chambeies of concentricity.

The utility model is used for during the internal-combustion engine, thereby because the piston is reciprocating motion and rotatory for the cylinder provides sufficient phase information, can be conveniently used for controlling the valve, ignite or splash fuel, and do not need the chain transform among the traditional crank connecting rod engine.

The utility model is used for during the external-combustion engine, the cylinder has a hot junction and a cold junction, and the hot junction is in the cylinder bottom, and the cold junction is in piston motion one end, have in the cylinder with cylinder assorted cylindricality slider, have the hole at two ends of one or more intercommunication between going to the bottom on the slider, the working medium passes through the hole flows between hot junction and cold junction, and the guide channel can design for the four-stroke, compress promptly, hold equally heat absorption, do work, hold equally and release heat or take a breath, the slider can be for cylinder and piston reciprocating motion and for cylinder or piston irrotational in the cylinder, the slider is being held equally and is heat absorption stroke position at the cold junction, hold equally and release heat or the stroke of taking a breath is located the hot junction, and hold equally and the stroke can not.

The utility model is used for during aeroengine, the working chamber of cylinder be annular cylinder axis center have with the concentric cylindrical hole of working chamber, this cylindrical hole is passed in the pivot of piston. This forms the core of an aircraft engine, which can be used in helicopters if the piston shaft is bladed at the end that passes through the cylinder, and in aircraft engines if the piston shaft is bladed at both ends that lie in the cylinder.

Because the piston also reciprocates relative to the cylinder during rotary motion, there is a power output connection problem.

When the piston rotates, the piston is connected with the power output rotating wheel, the rotating shaft of the piston can be used as a hub, the power output wheel is used as a rim, the spring is used as a spoke, and the included angle between the spring and the rotating shaft line of the piston can be designed into different angles according to requirements.

Of course, there are reciprocating and rotating power outputs, and there are many other solutions besides the above. For example, the connection is realized by one or more springs, or by a slide rod, or by a combination of a spring and a slide rod, or by a bearing connection, wherein two ends of each spring are respectively fixed on a piston and a power output rotating wheel, the slide rod can slide between the piston and the rotating wheel and enables the piston and the rotating wheel to synchronously rotate, the motion of the slide rod in a sliding chute can reduce friction through a ball or a roller, and the output rotating wheel does not rotate and only does reciprocating operation along with the piston when the bearing is connected; the piston is connected with the power output rotating wheel or can be directly connected together, so that the output rotates and reciprocates at the same time.

Adopt the utility model discloses a heat engine is at the during operation, reciprocating motion and rotation are made for the cylinder to the piston, and the change of its barycenter is along pivot rectilinear change, can realize no vibrations mode. A pair of mirror-image pistons and a cylinder rotating shaft are collinear to share one power output rotating wheel and synchronously rotate.

Compared with the prior art, the utility model beneficial effect who has is: compared with the traditional heat engine, the utility model has the greatest advantage that each stroke has larger design space. For example, the working stroke can be multiplied, so that the working is more sufficient, the combustion is more complete, the exhaust is more thorough, and the like, so that the theoretical thermal efficiency is greatly improved. The utility model discloses there is not pressure between piston and the cylinder wall to it is more simple more effective to seal, can improve the price/performance ratio of heat engine. The utility model discloses still provide interior outer chamber structure, adopted the exocoel to utilize the inner chamber waste heat to do work and for the radiating structure of inner chamber, can further improve the utilization ratio of heat energy. The utility model discloses because the piston can provide sufficient phase information for the cylinder is rotatory, make control such as valve, ignition, oil spout become simpler and accurate. The utility model discloses the barycenter is along pivot rectilinear change when single piston moves with the cylinder, and the piston of a pair of mirror image just can realize no vibrations mode with the cylinder. Above-mentioned advantage can make the adoption the utility model discloses an actual efficiency and the performance of heat engine promote by a wide margin and become the heat engine of new generation.

Drawings

The present invention will be further described with reference to the accompanying drawings.

Fig. 1 is the schematic structural diagram of the present invention, that is, when there is three period in the piston rotating for a circle relative to the cylinder, the distribution plan view of the three fixed rods.

Fig. 2 is a schematic view showing the expansion of one period plane in three guide channels of the present invention.

Fig. 3 is the side view schematic diagram of the position of the three guide channels and the fixed rod of the present invention, at this time, the guide channels are on the piston, and the machine is in the end state of acting.

Fig. 4 is the light piston overlooking schematic diagram of a guide channel of the utility model provided with three fixed rods, and the cylinder surface of the outer dotted circle at the guide channel is arranged on the cylinder and the diameter of the outer dotted circle is larger than the cylinder diameter.

Fig. 5 is a front view of fig. 4.

In the figure: 1 is a cylinder, 2 is a piston, 3 is a guide groove, and 4 is a fixed rod.

Detailed Description

As shown in fig. 1-5, the utility model relates to a piston rotary heat engine, including cylinder 1 and piston 2, piston 2 sets up in cylinder 1 with matcing, still includes guide channel 3 and fixed rod 4, guide channel 3 designs on cylinder 1 and fixed rod 4 installs on piston 2 or guide channel 3 designs on piston 2 and fixed rod 4 installs on cylinder 1, fixed rod 4 matches the contact with guide channel 3 and restricts the active mode of piston 2 in cylinder 1, makes piston 2 be reciprocating motion and rotation for cylinder 1.

The number of the guide channels 3 can be one or more, and the track of the guide channels 3 is designed according to different requirements, wherein each stroke of the piston 2 corresponds to one section of curve or linear guide channel 3, the guide channels 3 corresponding to two or more strokes are in one cycle period, and at least two cycle periods are required when the piston 2 rotates for one circle relative to the cylinder 1; the number of the fixed rods 4 contacting with the same surface of one guide channel 3 is equal to the number of the cycle periods of the guide channel 3, and the corresponding fixed rods 4 are uniformly distributed on a circle.

The number of the fixed rods 4 can be 1 or more without changing the positions of the fixed rods 4.

The guide channel 3 comprises a main guide channel and an auxiliary guide channel, the force borne by the main guide channel and the auxiliary guide channel is opposite to the component force direction of the rotating shaft direction of the piston 2, and the positions of the main guide channel and the auxiliary guide channel and the corresponding fixed rod 4 jointly determine the free clearance of the piston 2 moving in the cylinder 1.

The working cavity of the cylinder 1 is formed by one or more concentric circular cylinders or annular cylinders, and the piston 2 is of an integrated structure matched with the cylinder 1.

The cylinder 1 is provided with a hot end and a cold end, wherein the hot end is arranged at the bottom of the cylinder, the cold end is arranged at one end of a piston, a cylindrical sliding block matched with the cylinder 1 is arranged in the cylinder 1, the stroke designed by the guide channel 3 comprises an equal-volume heat absorption stroke and an equal-volume heat release or air exchange stroke, the sliding block can reciprocate in the cylinder relative to the cylinder 1 and the piston 2 and does not rotate relative to the cylinder 1 or the piston 2, and the sliding block is positioned at the cold end in the equal-volume heat absorption stroke and at the hot end in the equal-volume heat release or air exchange stroke.

One or more holes communicated with the two bottoms are formed between the upper bottom and the lower bottom of the sliding block, and working media can flow between the hot end and the cold end through the holes.

The working cavity of the cylinder 1 is an annular cylinder, a cylindrical hole coaxial with the working cavity is formed in the cylinder 1, and the rotating shaft of the piston 2 penetrates through the cylindrical hole.

The piston 2 is connected with the power output rotating wheel, the rotating shaft of the piston is used as a hub, the power output wheel is used as a rim, the spring is used as a spoke, and the included angle between the spring and the rotating shaft line of the piston can be designed into different angles according to requirements.

The present invention will be specifically explained below.

The utility model discloses a piston sets up in the cylinder with matcing, and the guide channel design is on the cylinder and the fixed rod is installed on the piston or the guide channel design is on the piston and the fixed rod is installed on the cylinder, and the fixed rod contacts and restricts the active mode of piston in the cylinder with the guide channel, makes the piston be reciprocating motion and rotation for the cylinder. Because the functions of the guide channel and the fixed rod are mutual, if the guide channel is fixed, the fixed rod moves, and if the fixed rod is fixed, the guide channel moves, so that two schemes exist: the guide channel is on the piston or on the cylinder.

The traditional piston, cylinder and crank connecting rod structure is characterized in that the crank connecting rod determines that the piston does reciprocating motion in the cylinder and generates pressure on the cylinder wall, and the guide channel fixed rod structure determines that the piston does reciprocating motion in the cylinder and simultaneously rotates without generating pressure on the cylinder wall.

The guide channels and the fixed rods thereof work together to bear various pressures of the piston, including the pressure generated by combustion of the internal combustion engine and the reaction force generated by the acceleration of the reciprocating motion of the piston, the former is mainly shared by increasing the number and the strength of the fixed rods, and the latter can reduce the maximum impulse force applied to the fixed rods by designing the curvature of the guide channels, lightening the mass of the piston, using a spring and other technologies.

The guide channel and the fixed rod act together to enable the piston to rotate relative to the cylinder while reciprocating, the guide channel can be designed according to different requirements, each stroke corresponds to a section of curve or straight line, two or more strokes are a cycle period, and one cycle of piston rotation has at least two cycle periods, generally three or more cycle periods. Because the piston can not be balanced in 1 cycle, the piston can be balanced when being lifted in 2 cycles but the stability is uncertain, the fixed rod number of each guide groove is generally the cycle number and is uniformly distributed on the same circle, and the algorithm for arranging the fixed rod position is adopted. However, if there are 6 cycles, it is possible to operate with 3 fixed rods, and as long as one or several fixed rods are missing in the original position of the fixed rod, the heat engine can also operate normally, for example, only 3 or 4 fixed rods can operate.

In each stroke of the internal combustion engine, two different conditions exist in the stress direction between the guide channel and the fixed rod, so that two different types of guide channels exist. For example, in the stroke of air suction, the guide channel is stressed by a small force and mainly is the inertia force of the piston, and in the strokes of compression, combustion, power and the like, the guide channel is stressed by a large acting force. The guide channel to receive the force generated by the compression, power and other strokes is called the main guide channel, and the guide channel to receive the force opposite to the direction of the main guide channel is called the auxiliary guide channel. The free clearance of the piston moving in the cylinder is determined by the positions of the main guide channel, the auxiliary guide channel and the corresponding fixed rod, and the proper free clearance can prevent the piston from being blocked in the movement of the cylinder and the collision between the fixed rod and the guide channel. The scheme of adopting an auxiliary guide channel fixed rod with certain weakness can ensure that the free gap has elasticity and the fixed rod and the guide channel are prevented from generating jumping collision.

Adopt in the heat engine of the utility model, probably need many main guide ditches and an auxiliary guide ditch, also can only be a wide enough guide ditch simultaneously for main guide ditch again auxiliary guide ditch. When a guide groove is adopted, the part of the fixed rod inserted into the guide groove can be in different shapes such as a plate shape and the like so as to achieve enough strength, one or more rolling components such as balls, tapered rollers, wheels, slip rings and the like are respectively embedded or installed on two surfaces of the plate-shaped fixed rod, which are contacted with the guide groove, and the guide groove can be designed according to the shape of the rolling component, so that the contact surface of the guide groove and the rolling component is increased, and the pressure of the fixed rod on the guide groove surface is reduced. When the guide channel is on the cylinder, the auxiliary guide channel is designed on one piece of the working cavity, and the main guide channel is designed on the cover of the side of the cylinder close to the piston.

The utility model discloses the biggest technical difficulty that exists is that solve the impact and the wearing and tearing between guide channel and the fixed rod, in order to reduce the guide channel and decide impact force and wearing and tearing between the rod, can adopt many guide channel schemes to increase the fixed rod number by multiples to the biggest impact force that receives every fixed rod reduces within the safety range. In order to reduce the friction between the guide channel and the fixed rod, the relative motion between the fixed rod and the contact part of the guide channel is designed to be mainly rolling, besides the embedding or the installation of the rolling part, various traditional schemes can be adopted, of course, the sliding mode can also be adopted for the material with small sliding friction coefficient and meeting the required strength, the sliding mode also has the advantages, the structure is simple, the reliability is high, and the prior art such as the adoption of the electroplating of high-strength metal and the like is not difficult to realize. In a huge internal combustion engine, the guide channel and the fixed rod may also be operated in a meshing mode.

As can be seen from the above embodiments, the shapes of the guide groove and the fixed rod are various, and the contact manner of the guide groove and the fixed rod is also various, the guide groove only has the existence of an abstract line of a curve or a straight line corresponding to each stroke, and the fixed rod only has the existence of contact with the guide groove and the existence of a force which is also a direct power source for making the piston reciprocate and rotate relative to the cylinder.

The utility model discloses if adopt multicavity structure, also a piston divide into concentric a circular and one or more annular just as an organic whole, the cylinder also divide into corresponding two chambeies or multicavity. For example, the circular inner cavity is a combustion working cavity of the internal combustion engine, the high compression ratio is adopted to improve the efficiency of the heat engine, the annular cavity around the circular inner cavity is an outer combustion engine working cavity, the low compression ratio is adopted, the outer cavity utilizes the waste heat of the inner cavity to do work and cool the inner cavity, and the efficiency of the internal combustion engine can be further improved. The structure can also be used for an external combustion engine, a high-temperature heat source is arranged in the center of an inner cavity of the external combustion engine, and the outer cavity cools the inner wall and applies work.

The utility model is used for during the internal-combustion engine, thereby because the piston is reciprocating motion and rotatory for the cylinder provides sufficient phase information, can be conveniently used for controlling valve, ignition or splash fuel, and do not need the chain transform among the traditional engine.

The utility model is used for during the external-combustion engine, adopt the similar structure of stirling, the difference can be through the design to the guide channel and realize that the constant volume is exothermic and the constant volume heat absorption stroke, this can not be realized to traditional crank connecting rod, and these two strokes make the heat engine can export more energy in a cycle period, and the working medium mainly flows between hot junction and cold junction through the inside hole of slider, porous slider is all profitable to reducing the aspects such as heat conduction loss raise the efficiency under the condition that does not influence compression ratio, the slider will reach required motion state, can adopt the utility model discloses a guide channel, decide the pole structure and change in a flexible way and increase the slide bar that links to each other with piston or cylinder or just can realize with the spring that the piston links to each other etc.. For example, a guide groove fixed rod is arranged on the sliding block, the piston extends into the guide groove, and the sliding block can only do reciprocating motion in the cylinder through a sliding groove and other structures between the sliding block and the cylinder.

The external combustion heat engine can also adopt ventilation to realize the constant volume heat release stroke, the working medium which does work and has residual heat is directly exchanged through two opposite ventilation ports on the cylinder wall, and the exchanged hot working medium can more effectively release heat.

The utility model is used for during aeroengine, the working chamber of cylinder is annular cylinder, have at cylinder axis center with the concentric cylindrical hole of working chamber, this cylindrical hole is passed in the pivot of piston. This forms the core of an aircraft engine, which can be used in helicopters if the piston shaft is bladed at the end that passes through the cylinder, and in aircraft engines if the piston shaft is bladed at both ends that lie in the cylinder.

Because the piston also reciprocates relative to the cylinder during rotary motion, there is a power output connection problem.

The connection of the piston and the power output rotating wheel can be realized by using a piston rotating shaft as a hub, an output wheel as a rim and a spring as a spoke, the axial acting force generated on the piston by the different angles of the spring and the rotating shaft is different, and the angle can be designed according to the requirement.

The connection of the piston with the power take-off wheel is also realized by using an elastic clutch plate, i.e. the power connector is also a clutch, or a special power connector is manufactured, etc. The scheme of the power connector comprises the following steps: the connection between the piston and the power output rotating wheel can also be realized by adopting one or more springs, and two ends of each spring are respectively fixed on the piston and the output rotating wheel. The piston is connected with the power output rotating wheel, or the piston is connected with the output rotating wheel through a sliding rod, the sliding rod can slide between the piston and the rotating wheel and enables the piston and the rotating wheel to synchronously rotate, and the sliding rod can reduce friction through balls or rollers when moving in the sliding groove. The connection between the piston and the power output rotating wheel can be realized by the combination of the spring and the sliding rod. The piston and the power output runner can also be directly connected together, so that the output rotates and reciprocates simultaneously, and the power output mechanism is suitable for output under special requirements, such as the aero-engine. The piston can be connected with the power output rotating wheel through a bearing, and the output rotating wheel does not rotate and only reciprocates along with the piston so as to be suitable for output under the requirement of special balls.

Owing to adopt the utility model discloses a heat engine is at the during operation, reciprocating motion and rotation are made for the cylinder to the piston, and the change of its barycenter is along pivot rectilinear change, can realize no vibrations mode of operation, and this is also the utility model discloses an inherent nature is by its structure natural decision. The mass center of the traditional crank connecting rod structure is changed in a curve, and the vibration is difficult to eliminate and is also determined by DNA. There are many schemes for realizing no vibration by adopting a multi-cylinder structure, and a better scheme is that a pair of mirror image pistons and a cylinder rotating shaft share a power output rotating wheel in a collinear way and rotate synchronously.

The working stroke can be designed to be larger than the compression stroke, the rotation angle is large, the pressure of gas at the end of working is close to the external pressure, exhaust noise is reduced, more kinetic energy can be output to improve the efficiency of the heat engine, combustion can be more sufficient due to the increase of the working time, the compression time and the exhaust time can be increased quickly to improve the output power, and the traditional crank connecting rod structure only can strictly 'program walking' and 'care' without prolonging the time.

The guide channel can increase a small horizontal combustion stroke after the compression stroke, so that combustion efficiency can be fully improved, and convenience is brought to connection and closing of the guide channel in each period in guide channel processing.

From the above, it can be seen that the waveforms of the guide channels are various, and different designs are possible to achieve different effects, and the abstract property of "designability" is one of the essential properties and is also a property which is not available in the existing heat engine.

It will be appreciated that the guide channel of the present invention is a programmable, closed, non-intersecting, abstract solid curve having at least two cycles around a cylindrical surface.

Adopt the utility model discloses the technique is because the piston is reciprocating motion and rotation for the cylinder to different fixed mode can obtain different effects, if the cylinder does not move for the base then the piston is rotatory and is reciprocating motion for the base, the cylinder is rotatory and reciprocating motion etc. is done for the base to the piston.

The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present invention within the knowledge of those skilled in the art.

Claims (9)

1. A piston rotating heat engine comprising a cylinder (1) and a piston (2), said piston (2) being matingly disposed within the cylinder (1), characterized in that: the piston is characterized by further comprising a guide groove (3) and a fixed rod (4), wherein the guide groove (3) is designed on the cylinder (1), the fixed rod (4) is installed on the piston (2) or the guide groove (3) is designed on the piston (2), the fixed rod (4) is installed on the cylinder (1), and the fixed rod (4) is in matched contact with the guide groove (3) and limits the moving mode of the piston (2) in the cylinder (1) so that the piston (2) can reciprocate and rotate relative to the cylinder (1).

2. A piston rotating heat engine according to claim 1, wherein the number of said guide channels (3) is one or more and the trajectory of said guide channels (3) is designed according to different needs, wherein each stroke of said piston (2) corresponds to a curved or linear guide channel (3), two or more strokes correspond to a cycle of guide channels (3), and a rotation of said piston (2) with respect to the cylinder (1) requires at least two cycles; the number of the fixed rods (4) contacting with the same surface of one guide channel (3) is equal to the number of the cycle periods of the guide channel (3), and the corresponding fixed rods (4) are uniformly distributed on a circle.

3. A piston rotating heat engine according to claim 2, wherein the number of said fixed bars (4) can be missing 1 or more without changing the position of said fixed bars (4).

4. A piston rotating heat engine according to claim 1, wherein the guide channels (3) comprise main and secondary guide channels and the forces to which they are subjected are directed in the direction opposite to the component of the force in the direction of the axis of rotation of the piston (2), the position of the main and secondary guide channels and their corresponding fixed rods (4) together determining the free play of the piston (2) in the cylinder (1).

5. A piston rotating heat engine according to claim 1, wherein the working chamber of the cylinder (1) is constituted by one or more concentric circular or annular cylinders, and the piston (2) is of a unitary construction matching the cylinder (1).

6. A piston rotating heat engine according to claim 1, wherein the cylinder (1) has a hot end and a cold end, wherein the hot end is at the bottom of the cylinder and the cold end is at the end of the piston movement, wherein the cylinder (1) has a cylindrical slide matching the cylinder (1), wherein the guide channel (3) is designed with strokes comprising an isochoric heat absorption stroke and an isochoric heat release or gas exchange stroke, wherein the slide is capable of reciprocating in the cylinder relative to the cylinder (1) and the piston (2) and is not rotating relative to the cylinder (1) or the piston (2), and wherein the slide is at the cold end in the isochoric heat absorption stroke and at the hot end in the isochoric heat release or gas exchange stroke.

7. A piston rotating heat engine as claimed in claim 6, wherein one or more apertures are provided between the upper and lower bottoms of the slide block to communicate the two bottoms, through which working fluid can flow between the hot and cold ends.

8. A piston rotating heat engine according to claim 1, wherein the working chamber of the cylinder (1) is an annular cylinder, a cylindrical hole coaxial with the working chamber being provided in the cylinder (1), the axis of rotation of the piston (2) passing through the cylindrical hole.

9. A piston rotating heat engine according to claim 1, wherein the piston (2) is connected to a power take off wheel, the power take off wheel being a hub, the power take off wheel being a rim, the spring being a spoke, the angle between the spring and the axis of rotation of the piston being designed to be different according to requirements.

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