A rotary piston engine

Abstract

The present invention discloses a rotary piston engine, comprising a cylinder body, a rotary piston and an output shaft; the cylinder body is coaxially mounted with the rotary piston and a circular ring-shaped working space is formed therebetween; the output shaft penetrates the cylinder body and the rotary piston and is coaxially mounted, the output shaft is tightly connected with the rotary piston and performs a rotary motion; a piston sheet is arranged on the outer peripheral wall of the rotary piston, an opening and closing valve that reciprocates between an open position and a closed position is arranged on the inner peripheral wall of the cylinder body, when the opening and closing valve is in the closed position, the opening and closing valve extends into the circular ring-shaped working space and is combined with the piston sheet to divide the circular ring-shaped space into a combustion chamber and an exhaust chamber; a linkage mechanism is arranged between the piston sheet and the opening and closing valve, so that the opening and closing valve performs an opening and closing action as the rotation position of the piston sheet changes. The rotary piston engine of the present invention has the advantages of simple structure, small size, low noise, reliable operation, etc.

Description

Technical Field

[0001] The invention mainly relates to the technical field of engines, in particular to a rotary piston engine. Background Art

[0002] There are two main types of piston engines: reciprocating piston engines and rotary piston engines. A piston fuel engine usually refers to an engine that outputs power in the form of fuel burning and expanding in the cylinder, pushing the piston downward to drive the crankshaft to rotate. It uses one or more pistons to convert pressure into rotational kinetic energy. Due to the existence of related transmission mechanisms such as cranks, it is not only complex in structure, but also has low reliability. The triangular rotor rotary piston engine invented by German Wankel in 1957 was successfully developed and applied. The power density of this engine is relatively large and its application prospects are promising. However, due to the complex shape of the rotor, the manufacturing cost is high, and there are difficult problems such as sealing difficulties, poor power performance at low speeds, and poor fuel economy, which make the theoretical advantages of the rotary piston engine have not been fully utilized so far. Summary of the invention

[0003] The technical problem to be solved by the present invention is: in view of the technical problems existing in the prior art, the present invention provides a rotary piston engine with simple structure, small size and high working reliability.

[0004] In order to solve the above technical problems, the technical solution proposed by the present invention is:

[0005] A rotary piston engine comprises a cylinder block, a rotary piston and an output shaft;

[0006] The cylinder body and the rotary piston are coaxially mounted to form an annular working space;

[0007] The output shaft penetrates the cylinder body and the rotary piston and is coaxially installed, and the output shaft is tightly connected to the rotary piston and performs a rotary motion;

[0008] A piston plate is arranged on the outer peripheral wall of the rotary piston, and an opening and closing valve which reciprocates between an open position and a closed position is arranged on the inner peripheral wall of the cylinder body. When the opening and closing valve is in the closed position, the opening and closing valve extends into the annular working space and is combined with the piston plate to divide the annular space into a combustion chamber and an exhaust chamber.

[0009] A linkage mechanism is provided between the piston plate and the opening and closing valve, so that the opening and closing valve can perform an opening and closing action as the rotation position of the piston plate changes.

[0010] As a further improvement of the above technical solution:

[0011] The opening and closing valve comprises a valve plate and a rotating shaft, one side of the valve plate is fastened to the rotating shaft, and both ends of the rotating shaft are rotatably mounted on the cylinder body. The valve plate performs opening and closing motion relative to one side of the rotating shaft with the rotating shaft as a fixed fulcrum.

[0012] The cylinder body is provided with a gate groove, and two side edges of the valve plate are clamped in the gate groove to limit the movement of the valve plate between the open position and the closed position.

[0013] The valve plate is in an arc shape and forms a complete circle with the inner wall of the cylinder body when in the open position.

[0014] The linkage mechanism includes a turntable and a connecting rod. The turntable is fixedly mounted on the output shaft and rotates with the output shaft. A track groove is provided on the turntable. One end of the connecting rod is tightly connected to one end of the rotating shaft, and the other end is clamped in the track groove. The track groove on the turntable enables the other end of the connecting rod to reciprocate back and forth, thereby enabling the valve plate on the rotating shaft at one end of the connecting rod to perform a reciprocating opening and closing motion.

[0015] The other end of the connecting rod is clamped in the track groove through a roller.

[0016] The linkage mechanism includes a cam and a crank; the cam is installed on the output shaft and rotates with the output shaft, the middle section of the crank is fixedly installed on one end of the rotating shaft, and a tensioning assembly is installed at one end of the crank for tightening the crank to make the valve plate on the rotating shaft connected to the crank in a closed state; when the cam rotates with the output shaft, it abuts against the other end of the crank at a position corresponding to the rotation position of the piston plate, so that the valve plate on the rotating shaft is in an open state to facilitate the passage of the piston plate.

[0017] The tensioning assembly comprises a spring and a mounting bracket, wherein the mounting bracket is mounted on the cylinder body, and two ends of the spring are respectively connected to the mounting bracket and one end of the crank.

[0018] The air inlet and / or fuel inlet of the engine are both located on the side wall of the cylinder body at the opening and closing valve.

[0019] The number of the piston plates and the opening and closing valves is one or a non-zero even number, and the number of the piston plates and the opening and closing valves is the same; when the number of the piston plates and the opening and closing valves is a non-zero even number, the piston plates are evenly distributed on the outer circumferential wall of the rotating piston, and the opening and closing valves are evenly distributed on the inner circumferential wall of the cylinder body.

[0020] Compared with the prior art, the advantages of the present invention are:

[0021] The rotary piston engine of the present invention has a rotary piston that performs a circular continuous rotation motion. Compared with the previous eccentric rotation mode (such as a triangular rotor rotary piston engine), the continuous rotation direction remains unchanged, the rotation is smoother, there is no eccentric friction or collision, the friction or collision is reduced, the quietness is better, and the working reliability is also guaranteed; the rotary piston performs a circular continuous rotation motion, the rotation direction is the same, there is no change, and there is no inertial weight loss; the rotary piston performs a circular continuous rotation motion, and a rotating structure such as an eccentric structure is not used, so that the structure is simpler, the volume is smaller, the weight is light, and it is suitable for applications with large specific power.

[0022] The rotary piston engine of the present invention uses an opening and closing valve to divide the working space, and has a simple overall structure, reliable operation and is easy to implement. A linkage mechanism is provided between the opening and closing valve and the output shaft, so that the opening and closing valve and the piston plate of the rotary piston on the output shaft move synchronously, and there will be no interference between the valve and the piston plate, etc., which greatly improves the reliability of the opening and closing valve switch operation.

[0023] The rotary piston engine of the present invention adopts a track groove as the linkage mechanism, which is simple in structure and easy to implement. The linkage mechanism adopts a cam as the linkage mechanism, which is simple in structure. When the linkage is working, the cam only contacts the crank in a collision-like manner, so that there is no compulsory force on the rotating shaft, thereby ensuring the reliability of the valve plate switch on the rotating shaft; in addition, a roller is arranged at the other end of the crank, which can also ensure the sliding contact between the cam and the roller, thereby reducing noise and friction. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the overall three-dimensional structure of the first embodiment of the present invention.

[0025] Figure 2 It is a schematic diagram of the top structure of the first embodiment of the present invention.

[0026] Figure 3 It is a schematic diagram of the three-dimensional structure of the first embodiment of the present invention (without the upper cylinder body).

[0027] Figure 4 It is a schematic diagram of the internal three-dimensional structure of the cylinder body of the first embodiment of the present invention.

[0028] Figure 5 This is one of the schematic diagrams of the top view of the internal structure of the cylinder body of the first embodiment of the present invention.

[0029] Figure 6 This is a second schematic diagram of the top view of the internal structure of the cylinder body of the first embodiment of the present invention.

[0030] Figure 7 This is the third schematic diagram of the top view of the internal structure of the cylinder body of the first embodiment of the present invention.

[0031] Figure 8 This is one of the overall three-dimensional structural schematic diagrams of the second embodiment of the present invention.

[0032] Fig. 9 This is the second schematic diagram of the overall three-dimensional structure of the second embodiment of the present invention.

[0033] Fig.10 It is a schematic diagram of the structure of the track groove of the second embodiment of the present invention.

[0034] The numbers in the figure indicate: 1. cylinder body; 101. upper cylinder body; 102. lower cylinder body; 103. door slot; 104. combustion chamber; 1041. air inlet; 105. exhaust chamber; 1051. exhaust port; 2. rotary piston; 201. piston plate; 3. output shaft; 4. opening and closing valve; 401. valve plate; 402. rotating shaft; 5. linkage mechanism; 511. cam; 512. crank; 513. tensioning assembly; 5131. spring; 5132. mounting bracket; 514. roller; 521. turntable; 5211. track groove; 522. connecting rod. DETAILED DESCRIPTION

[0035] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments.

[0036] Embodiment 1:

[0037] like Figures 1 to 7As shown, the rotary piston engine of this embodiment includes a cylinder body 1, a rotary piston 2 and an output shaft 3; wherein the cylinder body 1 includes an upper cylinder body 101 and a lower cylinder body 102; the rotary piston 2 is installed between the upper cylinder body 101 and the lower cylinder body 102 and is installed coaxially with the entire cylinder body 1, and a circular ring-shaped working space is formed between the entire cylinder body 1 and the rotary piston 2; the output shaft 3 penetrates the cylinder body 1 and the rotary piston 2 and is installed coaxially, the output shaft 3 is tightly connected to the rotary piston 2, and rotates around its own axis, and the output shaft 3 is a power shaft for outputting power; the outer periphery of the rotary piston 2 A piston plate 201 is arranged on the wall, and an opening and closing valve 4 which reciprocates between an open position and a closed position is arranged on the inner circumferential wall of the cylinder body 1. When the opening and closing valve 4 is in the closed position, the opening and closing valve 4 extends into the annular working space along the radial direction of the cylinder body 1 and contacts the side wall of the rotating piston 2, and is combined with the piston plate 201 to divide the annular space into a sealed combustion chamber 104 and an exhaust chamber 105; a linkage mechanism 5 is arranged between the piston plate 201 and the opening and closing valve 4, so that the opening and closing valve 4 opens and closes as the rotation position of the piston plate 201 changes. During operation, the piston plate 201 and the opening and closing valve 4 cooperate with each other to seal the working space into a combustion chamber 104, and then compressed air and fuel are injected into the combustion chamber 104 and ignited. The fuel burns and expands and acts on the piston plate 201, causing the piston plate 201 to rotate and drive the rotating piston 2 to rotate, that is, the output shaft 3 rotates, thereby outputting power; at the same time, the exhaust chamber 105 adjacent to the combustion chamber 104 synchronously discharges the combustion gas remaining from the last combustion through the exhaust port 1051 in the combustion chamber 104, ending one working stroke and entering the next working stroke.

[0038] The above rotary structure is used to continuously perform circular rotation to achieve power output, which has the following effects:

[0039] One is that the rotary piston 2 performs circular continuous rotation. Compared with the previous eccentric rotation mode (such as the triangular rotor rotary piston engine), the continuous rotation direction remains unchanged, the rotation is smoother, there is no eccentric friction or collision, the friction or collision is reduced, the quietness is better, and the working reliability is also guaranteed;

[0040] The second is that the rotary piston 2 performs a circular continuous rotation motion, the rotation direction is the same, there is no change, and there is no loss of inertial weight;

[0041] Third, the rotary piston 2 performs circular continuous rotation without using a rotating structure such as an eccentric structure, thereby making the structure simpler, smaller in size, lighter in weight, and suitable for applications with high specific power;

[0042] Fourth, the opening and closing valve 4 is used to realize the division of the working space (or working stroke), the overall structure is simple, the working reliability of the opening and closing sealing method is high and it is easier to realize;

[0043] Fifth, a mechanical linkage mechanism 5 is provided between the opening and closing valve 4 and the output shaft 3, so that the opening and closing valve 4 and the piston plate 201 of the rotary piston 2 on the output shaft 3 move synchronously, and there will be no interference between the valve and the piston plate 201, etc., which greatly improves the reliability of the opening and closing valve 4.

[0044] like Figure 4 As shown, in this embodiment, the opening and closing valve 4 includes a valve disc 401 and a rotating shaft 402, the rotating shaft 402 is fastened to one side of the valve disc 401, and the two ends of the rotating shaft 402 are rotatably mounted on the upper and lower sides of the cylinder body 1 (that is, they are rotatably mounted on the upper cylinder body 101 and the lower cylinder body 102, respectively), and the valve disc 401 performs an opening and closing movement relative to one side of the rotating shaft 402 with the rotating shaft 402 as a fixed fulcrum (similar to a flat door structure). In addition, a door groove 103 is provided at the position where the upper cylinder body 101 and the lower cylinder body 102 contact the valve disc 401, and the upper and lower sides of the valve disc 401 are clamped in the door groove 103, wherein the shape of the door groove 103 is fan-shaped, so that the valve disc 401 rotates in the fan-shaped door groove 103, and the rotation position of the valve disc 401 is restricted, and the reliability of the operation of the valve disc 401 is further improved. In addition, the valve plate 401 is in an arc shape and forms a complete circle with the inner wall of the cylinder body 1 when in the open position, which has no effect on the rotation of the piston plate 201 and improves the reliability of the rotation of the piston plate 201.

[0045] In this embodiment, the linkage mechanism 5 includes a cam 511 and a crank 512; the cam 511 is mounted on the output shaft 3 and rotates with the output shaft 3, the middle section of the crank 512 is fixedly mounted on one end of the rotating shaft 402, and a tensioning assembly 513 is installed at one end of the crank 512 for tightening the crank 512 to close the valve plate 401 on the rotating shaft 402 connected to the crank 512; when the cam 511 rotates synchronously with the output shaft 3, at the beginning of the next stroke, it abuts against the roller 514 at the other end of the crank 512, so that the crank 512 rotates. The cam 511 is disengaged from the roller 514 at the other end of the crank 512 after the piston 201 passes through, and the crank 512 is reset under the action of the tensioning assembly 513, so that the crank 512 drives the valve plate 401 on the rotating shaft 402 to rotate to the closed position, thereby forming a sealed combustion chamber 104 with the piston 201, and then charging, igniting and exploding to perform work. Specifically, the tensioning assembly 513 includes a spring 5131 and a mounting bracket 5132, the mounting bracket 5132 is mounted on the cylinder body 1, and the two ends of the spring 5131 are respectively connected to the mounting bracket 5132 and one end of the crank 512, and the crank 512 is automatically reset by the elastic force of the spring 5131. This linkage mechanism 5 has a simple structure. When the linkage is working, the cam 511 only has a collision-like contact with the crank 512, so there is no compulsory force on the rotating shaft 402, thereby ensuring the reliability of the switch of the valve plate 401 on the rotating shaft 402; in addition, a roller 514 is arranged at the other end of the crank 512, which can also ensure the sliding contact between the cam 511 and the roller 514, thereby reducing noise and friction.

[0046] In this embodiment, the number of piston plates 201 and opening and closing valves 4 are both two, and the piston plates 201 are evenly distributed on the outer peripheral wall of the rotary piston 2, and the opening and closing valves 4 are evenly distributed on the inner peripheral wall of the cylinder body 1. When selecting the number, most of them are even-numbered pairs and evenly distributed to form a symmetrical distribution, which will not generate eccentric force and ensure the stability of the structure. At the same time, multiple combustion chambers 104 can have multiple working strokes in a circular motion track, so that the overall structure can be smaller. Of course, the specific number is not limited here. In other embodiments, the number can also be selected according to actual conditions such as the type of fuel.

[0047] In this embodiment, a nozzle for injecting fuel such as oil or gas and a nozzle for compressed air (not shown in the figure) are arranged at the air inlet 1041 at the position of the valve plate 401. Figure 5 At the positions A1 and A2 in the figure, an ignition device (such as a spark plug, not shown in the figure) is also installed here; the exhaust port 1051 is located near the valve plate 401, that is, at the end position of a stroke.

[0048] The specific work process is based on Figures 5 to 7 For detailed explanation:

[0049] like Figure 5 As shown, after the piston plate 201 just passes the position of the valve plate 401 at position A1, the valve plate 401 rotates and is in the closed position, so that a closed space is formed between the valve plate 401 and the piston plate 201, that is, the combustion chamber 104 (as shown in FIG. Figure 5 The nozzle at position A1 sprays fuel and compressed air into the combustion chamber 104, and then the spark plug ignites. At this time, the pressure generated by the combustion of the fuel acts on the piston plate 201, causing the rotary piston 2 to continue to rotate counterclockwise, driving the output shaft 3 to output power; at the same time, the exhaust chamber 105 (such as Figure 5 In the space B in the middle, there is still gas from the last combustion, and under the action of the piston plate 201, the residual gas is discharged from the exhaust port 1051, thus ending a stroke;

[0050] like Figure 6 As shown, after the previous stroke is completed, the valve plate 401 (at position A2) at the next working stroke is opened to facilitate the passage of the piston plate 201; then the jet ignition explosion work of the next working stroke is performed according to the above working process, as shown in FIG. Figure 7 shown.

[0051] Embodiment 2:

[0052] like Figures 8 to 10 As shown, the difference between this embodiment and the first embodiment is only the difference in the linkage mechanism 5. Specifically, the linkage mechanism 5 of this embodiment includes a rotating disk 521 and a connecting rod 522. The rotating disk 521 is fixedly mounted on the output shaft 3 and rotates with the output shaft 3. A track groove 5211 is provided on the rotating disk 521. One end of the connecting rod 522 is tightly connected to one end of the rotating shaft 402, and the other end is clamped in the track groove 5211 through a roller. The track groove 5211 on the rotating disk 521 allows the other end of the connecting rod 522 to reciprocate back and forth, and the valve plate 401 on the rotating shaft 402 at one end of the connecting rod 522 performs a reciprocating opening and closing motion. That is, through the design of the track groove 5211, the connecting rod 522 inserted into the track groove 5211 can rotate according to a certain rule, thereby realizing the normal opening and closing of the valve plate 401. This linkage mechanism 5 has a simple structure and is easy to implement.

[0053] The above are only preferred embodiments of the present invention, and the protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the present invention should be regarded as the protection scope of the present invention.

Claims

1. A rotary piston engine, characterized in that: It comprises a cylinder body (1), a rotary piston (2) and an output shaft (3); The cylinder body (1) and the rotary piston (2) are coaxially mounted and form an annular working space therebetween; The output shaft (3) passes through the cylinder body (1) and the rotary piston (2) and is coaxially mounted; the output shaft (3) is tightly connected to the rotary piston (2) and performs continuous rotational motion; A piston plate (201) is arranged on the outer peripheral wall of the rotary piston (2), and an opening and closing valve (4) which reciprocates between an open position and a closed position is arranged on the inner peripheral wall of the cylinder body (1); when the opening and closing valve (4) is in the closed position, the opening and closing valve (4) extends into the annular working space and is combined with the piston plate (201) to divide the annular working space into a combustion chamber (104) and an exhaust chamber (105); A linkage mechanism (5) is provided between the piston plate (201) and the opening and closing valve (4), so that the opening and closing valve (4) performs an opening and closing action as the rotation position of the piston plate (201) changes; The open-and-close valve (4) comprises a valve plate (401) and a rotating shaft (402), wherein the rotating shaft (402) is fixed to one side of the valve plate (401); both ends of the rotating shaft (402) are rotatably mounted on the cylinder body (1), and the valve plate (401) performs an opening and closing movement relative to one side of the rotating shaft (402) with the rotating shaft (402) as a fixed fulcrum; The linkage mechanism (5) comprises a rotating disk (521) and a connecting rod (522); the rotating disk (521) is fixedly mounted on the output shaft (3) and rotates with the output shaft (3); a track groove (5211) is provided on the rotating disk (521); one end of the connecting rod (522) is tightly connected to one end of the rotating shaft (402), and the other end is clamped in the track groove (5211); the track groove (5211) on the rotating disk (521) causes the other end of the connecting rod (522) to reciprocate back and forth, thereby causing the valve plate (401) on the rotating shaft (402) at one end of the connecting rod (522) to perform a reciprocating opening and closing motion; The other end of the connecting rod (522) is clamped in the track groove (5211) via a roller (514); Alternatively, the linkage mechanism (5) comprises a cam (511) and a crank (512); the cam (511) is mounted on the output shaft (3) and rotates with the output shaft (3); the middle section of the crank (512) is fixedly mounted on one end of the rotating shaft (402); a tensioning assembly (513) is mounted on one end of the crank (512) for tensioning the crank (512) so that a valve plate (401) on the rotating shaft (402) connected to the crank (512) is in a closed state; when the cam (511) rotates with the output shaft (3), it abuts against the other end of the crank (512) at a position corresponding to the rotational position of the piston plate (201), so that the valve plate (401) on the rotating shaft (402) is in an open state to facilitate the passage of the piston plate (201); The tensioning assembly (513) comprises a spring (5131) and a mounting bracket (5132), wherein the mounting bracket (5132) is mounted on the cylinder body (1), and two ends of the spring (5131) are respectively connected to the mounting bracket (5132) and one end of the crank (512); The cylinder body (1) is provided with a door groove (103), and two side edges of the valve plate (401) are clamped in the door groove (103) to limit the movement of the valve plate (401) between an open position and a closed position.

2. The rotary piston engine according to claim 1, characterized in that The valve plate (401) is in the shape of an arc, and forms a complete circle with the inner wall of the cylinder body (1) when in the open position.

3. The rotary piston engine according to any one of claims 1 to 2, characterized in that: The air inlet and / or fuel inlet of the engine are both located on the side wall of the cylinder body (1) at the opening and closing valve (4).

4. A rotary piston engine according to any one of claims 1 to 2, characterized in that: The number of the piston plates (201) and the opening and closing valves (4) are both one or a non-zero even number, and the number of the piston plates (201) and the opening and closing valves (4) are the same; when the number of the piston plates (201) and the opening and closing valves (4) are a non-zero even number, the piston plates (201) are evenly distributed on the outer peripheral wall of the rotary piston (2), and the opening and closing valves (4) are evenly distributed on the inner peripheral wall of the cylinder body (1).

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