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 continuous rotational motion; a piston plate is arranged on the outer peripheral wall of the rotary piston, and a rotary valve for continuously rotating to close or open the circular ring-shaped working space is arranged on the inner peripheral wall of the cylinder body; the rotary valve is combined with the piston plate when in a closed state to divide the circular ring-shaped space into a combustion chamber and an exhaust chamber; a linkage mechanism is arranged between the piston plate and the rotary valve, so that the rotary valve opens or closes the circular ring-shaped working space as the rotation position of the piston plate 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 continuous rotary piston engine with simple structure, small size, good quietness and high 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 continuous rotational motion;

[0008] A piston plate is provided on the outer peripheral wall of the rotary piston, and a rotary valve which continuously rotates to close or open the annular working space is provided on the inner peripheral wall of the cylinder body; the rotary valve is combined with the piston plate in a closed state 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 rotary valve, so that the rotary valve opens or closes the annular working space as the rotating position of the piston plate changes.

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

[0011] The rotary valve includes a valve plate and a rotating shaft. The valve plate is in an arc shape. The rotating shaft is installed at the center of the arc-shaped valve plate. The valve plate performs continuous rotational motion with the rotating shaft as a fixed axis. The valve plate contacts the peripheral wall of the rotary piston to close the annular working space, and the valve plate is separated from the peripheral wall of the rotary piston to open the annular working space.

[0012] A counterweight is provided at one end or / and both ends of the rotating shaft and at a side opposite to the valve plate, so as to offset the eccentric moment of the valve plate.

[0013] The counterweight is fan-shaped.

[0014] The cylinder body is provided with a gate groove, and the end of the valve plate rotates in the gate groove.

[0015] The linkage mechanism comprises a driving wheel and a driven wheel, wherein the driving wheel is mounted on the output shaft, and the driven wheel is mounted on the rotating shaft, and transmission is performed between the driving wheel and the driven wheel via a transmission belt.

[0016] A tensioning assembly is provided on one side of the transmission belt for tensioning the transmission belt.

[0017] The tensioning assembly includes a tensioning wheel, a spring and a connecting rod. The middle section of the connecting rod is rotatably mounted on the cylinder body, the tensioning wheel is mounted on one end of the connecting rod, one end of the spring is fixed to the cylinder body, and the other end is connected to the other end of the connecting rod; the other end of the connecting rod rotates under the elastic force of the spring, so that the tensioning wheel at the other end tensions the transmission belt.

[0018] The driving wheel and the driven wheel are both sprockets, and the transmission belt is a chain; or the driving wheel and the driven wheel are both pulleys, and the transmission belt is a belt.

[0019] The linkage mechanism comprises a driving wheel and a driven wheel, wherein the driving wheel is mounted on the output shaft, and the driven wheel is mounted on the rotating shaft, and the driving wheel and the driven wheel are meshed with each other.

[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 a rotary valve to realize the division of the working space (or working stroke), and the overall structure is simple; the rotary sealing method has high working reliability and is easier to implement. Compared with the opening and closing or reciprocating sealing method, this method works smoothly without collision between parts, further reducing noise. A linkage mechanism is provided between the opening and closing valve and the output shaft, so that the rotary 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 mechanical master-driven wheel and slave-driven wheel matching form in its linkage mechanism, which has a simple structure and reliable operation, thereby ensuring the reliability of engine operation. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0025] Figure 2 It is a schematic diagram of the three-dimensional structure of the present invention (without the upper cover).

[0026] Figure 3 It is a three-dimensional structural schematic diagram 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 present invention.

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

[0029] Figure 5b This is the second schematic diagram of the top view of the internal structure of the cylinder body of the present invention.

[0030] Figure 5c This is the third schematic diagram of the top view of the internal structure of the cylinder body of the present invention.

[0031] 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; 1042. air inlet assembly; 1043. ignition plug; 105. exhaust chamber; 1051. exhaust port; 1052. exhaust assembly; 106. upper cover; 2. rotary piston; 201. piston plate; 3. output shaft; 4. rotary valve; 401. valve plate; 402. rotating shaft; 403. counterweight; 5. linkage mechanism; 501. driving wheel; 502. driven wheel; 503. transmission belt; 504. tensioning assembly; 5041. connecting rod; 5042. tensioning wheel; 5043. spring. DETAILED DESCRIPTION

[0032] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments.

[0033] like Figure 1 As shown in FIG5 , the rotary piston engine of the present embodiment comprises a cylinder body 1, a rotary piston 2 and an output shaft 3; wherein the cylinder body 1 comprises 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 performs continuous rotation around its own axis, and the output shaft 3 is a power shaft for outputting power; the rotary piston 2 is installed coaxially with the cylinder body 1 and the rotary piston 2, and the output shaft 3 is connected with the rotary piston 2 and performs continuous rotation around its own axis, and the output shaft 3 is a power shaft for outputting power; A piston plate 201 is provided on the outer peripheral wall of the rotary piston 2, and a rotary valve 4 which continuously rotates to close or open the annular working space is provided on the inner peripheral wall of the cylinder body 1. When the rotary valve 4 is in the closed position, the rotary valve 4 contacts the side wall of the rotary 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 provided between the piston plate 201 and the opening and closing valve 4, so that the rotary valve 4 opens or closes the annular working space as the rotation position of the piston plate 201 changes. During operation, the piston plate 201 and the rotary 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 rotary 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.

[0034] The above rotary structure is used to continuously perform circular rotation to achieve power output, which has the following effects:

[0035] 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;

[0036] 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;

[0037] 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;

[0038] Fourth, the rotary valve 4 is used to divide the working space (or working stroke), and the overall structure is simple; the rotary sealing method has high working reliability and is easier to implement. Compared with the opening and closing or reciprocating sealing method, this method works smoothly, without collision between parts, and further reduces noise;

[0039] Fifth, a mechanical linkage mechanism 5 is provided between the rotary 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, thereby greatly improving the reliability of the engine operation.

[0040] The rotary piston engine can be applied to land, sea and air equipment such as automobiles, ships and aircraft.

[0041] In this embodiment, the rotary valve 4 includes a valve disc 401 and a rotating shaft 402. The valve disc 401 is in an arc shape, and the rotating shaft 402 is installed at the center of the arc-shaped valve disc 401. The two ends of the rotating shaft 402 are rotatably installed on the upper and lower sides of the cylinder body 1 (that is, they are rotatably installed on the upper cylinder body 101 and the lower cylinder body 102 respectively). The valve disc 401 performs continuous rotational motion with the rotating shaft 402 as the fixed axis; the valve disc 401 contacts the peripheral wall of the rotary piston 2 to close the annular working space, and the valve disc 401 is separated from the peripheral wall of the rotary piston 2 to open the annular working space. As shown in Figure 5, when the valve disc 401 is performing circular rotational motion, in a time period, the valve disc 401 will contact the peripheral wall of the rotary piston 2, thereby separating the annular working space; in another time period, the valve disc 401 will be separated from the peripheral wall of the rotary piston 2, and at this time, the valve disc 401 will not have a separating effect. The structure of the rotary valve 4 adopts a continuous rotation mode, operates smoothly, and does not cause hard collisions, thereby reducing noise and also reducing the strength requirements of each component (the collision mode has higher strength requirements for components); in addition, the overall structure is simple, the operation is reliable and easy to implement.

[0042] like Figure 4As shown in FIG5 , further, during the rotation of the valve disc 401, an eccentric moment will occur, which is not conducive to the working stability of each component. On this basis, a counterweight 403 is provided at both ends of the rotating shaft 402 and on the side opposite to the valve disc 401. The counterweight 403 rotates synchronously with the rotating shaft 402 to offset the eccentric moment generated by the valve disc 401 during the rotation process, thereby ensuring the reliability of the work. At the same time, the counterweight 403 at both ends of the rotating shaft 402 can offset the asymmetry in the axial direction of the rotating shaft 402. Specifically, the counterweight 403 is provided at both ends of the rotating shaft 402. The counterweight 403 is fan-shaped and opposite to the fan-shaped valve disc 401. The installation position of the counterweight 403 on the rotating shaft 402 is selected according to the actual situation. In addition, door grooves 103 are provided at the positions where the upper cylinder body 101 and the lower cylinder body 102 contact the valve plate 401, and the upper and lower sides of the valve plate 401 are clamped in the door grooves 103, wherein the shape of the door grooves 103 is circular, so that the valve plate 401 can rotate in the circular door grooves 103, thereby limiting the rotation position of the valve plate 401 and further improving the working reliability of the valve plate 401.

[0043] like Figure 2 and Figure 3 As shown, in this embodiment, the linkage mechanism 5 is covered on the cylinder body 1 through the upper cover 106. The linkage mechanism 5 includes a driving wheel 501 and a driven wheel 502, the driving wheel 501 is installed on the output shaft, and the driven wheel 502 is installed on the rotating shaft. The driving wheel 501 and the driven wheel 502 are transmitted through a transmission belt 503. Specifically, the driving wheel 501 and the driven wheel 502 are both sprockets, and the transmission belt 503 is a chain. By designing the size of the driving wheel 501 and the driven wheel 502, the valve plate on the driven wheel 502 follows the position change of the piston plate on the driving wheel 501 to rotate regularly, so as to realize the opening and closing in the working space. The above linkage mechanism 5 has a simple structure, mechanical linkage, and high reliability. Of course, in other embodiments, the driving wheel 501 and the driven wheel 502 can be both pulleys, and the transmission belt 503 is a belt; or the driving wheel 501 and the driven wheel 502 are both gears, and the two are directly meshed or transmitted through other intermediate gears. In addition, a tensioning assembly 504 is provided on one side of the chain, which is used to tension the transmission belt 503, ensure reliable transmission between the driving wheel 501 and the driven wheel 502, and ensure that there is no interference between the piston plate and the valve plate. Specifically, the tensioning assembly 504 includes a tensioning wheel 5042, a spring 5043 and a connecting rod 5041. The middle section of the connecting rod 5041 is rotatably mounted on the cylinder body, the tensioning wheel 5042 is mounted on one end of the connecting rod 5041, one end of the spring 5043 is fixed on the cylinder body, and the other end is connected to the other end of the connecting rod 5041; the other end of the connecting rod 5041 rotates under the elastic force of the spring 5043, so that the tensioning wheel 5042 at the other end tensions the transmission belt 503. The tensioning assembly 504 is simple in structure and easy to implement.

[0044] In this embodiment, the number of piston plates 201 and rotary 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 rotary 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.

[0045] In this embodiment, the air intake assembly 1042 for injecting fuel such as oil or gas and compressed air is provided through the air intake port 1041 (such as Figure 5a The mixed gas is injected into the combustion chamber 104 at the positions A1 and A2 in the cylinder, and then ignited and exploded by the ignition plug; the exhaust port 1051 is located near the valve plate 401, that is, at the end position of a stroke, and the burned gas enters the exhaust component 1052 through the exhaust port 1051 and is then discharged out of the cylinder.

[0046] The specific work process is based on Figure 5a to 5c For detailed explanation:

[0047] like Figure 5a 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 5a 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 5a In the space B in the middle, there is still gas from the last combustion. Under the action of the piston plate 201, the residual gas is discharged from the exhaust port 1051, thereby ending a stroke. The end state is as follows: Figure 5b As shown;

[0048] After the last stroke is completed, the valve plate 401 (at position A2) at the next working stroke rotates to an open state to facilitate the passage of the piston plate 201. Figure 5c As shown, the jet ignition explosion work of the next working stroke is then carried out according to the above working process.

[0049] 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 provided on the outer peripheral wall of the rotary piston (2), and a rotary valve (4) is provided on the inner peripheral wall of the cylinder body (1) for closing or opening the annular working space by continuous rotary motion; when in a closed state, the rotary valve (4) 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 rotary valve (4), so that the rotary valve (4) opens or closes the annular working space as the rotation position of the piston plate (201) changes; The rotary valve (4) comprises a valve plate (401) and a rotating shaft (402); the valve plate (401) is in an arc shape; the rotating shaft (402) is mounted at the center of the arc-shaped valve plate (401); the valve plate (401) performs continuous rotational motion with the rotating shaft (402) as a fixed axis; the valve plate (401) contacts the peripheral wall of the rotary piston (2) to close the annular working space; the valve plate (401) is separated from the peripheral wall of the rotary piston (2) to open the annular working space; A counterweight (403) is provided at one end or / and both ends of the rotating shaft (402) and at a side opposite to the valve plate (401) to offset the eccentric moment of the valve plate (401); The cylinder body (1) is provided with a door groove (103), and the end of the valve plate (401) rotates in the door groove (103).

2. The rotary piston engine according to claim 1, characterized in that The counterweight block (403) is fan-shaped.

3. The rotary piston engine according to any one of claims 1 to 2, characterized in that: The linkage mechanism (5) comprises a driving wheel (501) and a driven wheel (502); the driving wheel (501) is mounted on the output shaft (3); the driven wheel (502) is mounted on the rotating shaft (402); and transmission is performed between the driving wheel (501) and the driven wheel (502) via a transmission belt (503).

4. The rotary piston engine according to claim 3, characterized in that A tensioning assembly (504) is provided on one side of the transmission belt (503) for tensioning the transmission belt (503).

5. The rotary piston engine according to claim 4, characterized in that The tensioning assembly (504) comprises a tensioning wheel (5042), a spring (5043) and a connecting rod (5041); the middle section of the connecting rod (5041) is rotatably mounted on the cylinder body (1); the tensioning wheel (5042) is mounted on one end of the connecting rod (5041); one end of the spring (5043) is fixed on the cylinder body (1), and the other end is connected to the other end of the connecting rod (5041); the other end of the connecting rod (5041) rotates under the elastic force of the spring (5043), thereby causing the tensioning wheel (5042) at the other end to tension the transmission belt (503).

6. The rotary piston engine according to claim 3, characterized in that: The driving wheel (501) and the driven wheel (502) are both sprocket wheels, and the transmission belt (503) is a chain; or the driving wheel (501) and the driven wheel (502) are both pulleys, and the transmission belt (503) is a belt.

7. A rotary piston engine according to any one of claims 1 to 2, characterized in that: The linkage mechanism (5) comprises a driving wheel (501) and a driven wheel (502); the driving wheel (501) is mounted on the output shaft (3); the driven wheel (502) is mounted on the rotating shaft (402); the driving wheel (501) and the driven wheel (502) are meshed with each other.

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