A novel rotary engine structure and its working method

Abstract

This invention discloses a novel rotary engine structure and its operating method, comprising a cylinder block assembly, a front cover assembly, a rear cover assembly, a main shaft assembly, and a rotor assembly. The cylinder block assembly, front cover assembly, and rear cover assembly are all triangular-like structures. The cylinder block assembly has three semi-circular cavities at its center, and radial seals are respectively provided at the junctions of the three semicircles of each cavity. The front cover assembly has a front center hole, and the rear cover assembly has a rear center hole. The cylinder block assembly, front cover assembly, and rear cover assembly are fixedly connected to form the engine body. The rotor assembly includes an "8"-shaped rotor, with end face seals provided on both ends of the "8"-shaped rotor. The "8"-shaped rotor is disposed within the three semi-circular cavities. The main shaft assembly passes sequentially through the front center hole of the front cover assembly, the center of the "8"-shaped rotor in the cylinder block assembly, and the rear center hole of the rear cover assembly, with both ends of the main shaft assembly being limited.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of engine, and particularly relates to a novel rotor engine structure and a working method thereof. BACKGROUND

[0002] A rotor engine is an engine that generates power using rotational motion, and was first developed by Wankel. The Wankel engine developed by Wankel includes a housing whose inner surface is formed of an epitrochoid, and a triangular rotor that rotates in the housing. The internal space of the housing is divided into three spaces by the rotor, and the volumes of these spaces vary according to the rotation of the rotor, thereby continuously completing the four strokes of intake -> compression -> work -> exhaust. The Wankel engine is configured such that each stroke is performed three times when the rotor rotates one revolution, and the eccentric shaft rotates three revolutions. Since the Wankel engine was developed, various studies have been conducted to optimize the design of the Wankel engine, and improved rotor engines continue to be developed.

[0003] The rotor engine is easily miniaturized due to its simple structure, and is a high-output engine capable of generating high output power in high-speed operation. Due to these characteristics, the rotor engine has the advantage of being applicable to various devices such as a heat pump system, a car, a bicycle, an airplane, a jet ski, a chain saw, a remote control airplane, etc. In addition, the rotor engine has the advantages of low vibration and low noise and low NOx emission due to its uniform rotational force.

[0004] However, the current rotor engine has low thermal efficiency due to low compression ratio, and the existing rotor engine has low power performance, economy and reliability when applied to an aviation system because the cylinder combustion surface and the exhaust position are fixed, the local heat load of the cylinder is high, and the rotor radial seal strip is difficult to forcibly lubricate and is easily ground, and thus there is a need to develop a novel rotor engine. SUMMARY

[0005] The present application aims to overcome the deficiencies of the prior art, and provides a novel rotor engine structure and a working method thereof.

[0006] In order to solve the technical problems, the technical scheme of the present application is: a novel rotor engine structure, comprising a cylinder assembly, a front end cover assembly, a rear end cover assembly, a main shaft assembly and a rotor assembly, the cylinder assembly, the front end cover assembly and the rear end cover assembly are all triangular structures, the cylinder assembly is provided with a three-semicircle cavity in the center, the three-semicircle cavity is provided with radial sealing elements at the joints of the three semicircles, the front end cover assembly is provided with a front center hole in the center, the rear end cover assembly is provided with a rear center hole in the center, the front center hole, the three-semicircle cavity and the rear center hole are coaxially arranged, the cylinder assembly, the front end cover assembly and the rear end cover assembly are fixedly connected to form an engine body, the rotor assembly comprises an “8”-shaped rotor, the “8”-shaped rotor is provided with end face sealing elements at both ends, the “8”-shaped rotor is arranged in the three-semicircle cavity, and the main shaft assembly passes through the front center hole of the front end cover assembly, the center of the “8”-shaped rotor in the cylinder assembly and the rear center hole of the rear end cover assembly in sequence and is limited at both ends.

[0007] Preferably, the cylinder assembly comprises a lubricating oil channel, an oil injector mounting hole, a combustion chamber, a cooling water cavity, a positioning pin hole, a triangular cylinder body, a radial sealing element mounting groove and a bolt hole, the triangular cylinder body is provided with a three-semicircle cavity in the center, the three-semicircle cavity is provided with a combustion chamber at each top, the combustion chamber is provided with an oil injector mounting hole near the side of the front end cover assembly, the three-semicircle cavity is provided with a radial sealing element mounting groove at the joint of each semicircle, the radial sealing element is mounted in the radial sealing element mounting groove, the triangular cylinder body is provided with a lubricating oil channel on each outer wall, the lubricating oil channel is in communication with the radial sealing element mounting groove, and the triangular cylinder body around the three-semicircle cavity is uniformly provided with a cooling water cavity, and the triangular cylinder body around the edge is uniformly provided with a positioning pin hole and a bolt hole.

[0008] Preferably, the front end cover assembly comprises an exhaust hole, a front lubricating oil outer hole, an oil injector mounting seat, a front cooling water cavity, a front lubricating oil inner hole, a gear bolt hole, a front positioning pin hole, a front bolt hole, a front center hole and a front end cover body, the front end cover body is provided with a center hole in the center, the inside of the center hole is circumferentially provided with a gear bolt hole, the front end cover body around the front center hole is uniformly provided with three exhaust holes, when the “8”-shaped rotor rotates to the phase of the exhaust hole, the gas outlet of the “8”-shaped rotor is in communication with the exhaust hole, the front end cover body around the edge is uniformly provided with three oil injector mounting seats, the three oil injector mounting seats correspond to the positions of the three oil injector mounting holes, the outer end surface of the front end cover body is provided with a front lubricating oil outer hole, the inner end surface of the front end cover body is provided with a front lubricating oil inner hole, the front lubricating oil outer hole is in communication with the front lubricating oil inner hole, the position of the front lubricating oil inner hole corresponds to the position of the end face sealing element, the inner end surface of the front end cover body is further provided with a front cooling water cavity, the front cooling water cavity corresponds to the position of the cooling water cavity, and the edge of the front end cover body is uniformly provided with a front positioning pin hole and a front bolt hole, the front positioning pin hole corresponds to the position of the positioning pin hole, and the front bolt hole corresponds to the position of the bolt hole.

[0009] Preferably, the rear end cover assembly comprises air inlet holes, a rear cooling water cavity, a rear lubricating oil inner hole, a retainer groove, a bearing hole, a rear lubricating oil outer hole, a rear bolt hole, a rear positioning pin hole, a rear center hole and a rear end cover body, the rear center hole is arranged in the center of the rear end cover body, the retainer groove and the bearing hole are arranged in the inner circle of the rear center hole, three air inlet holes are uniformly distributed on the periphery of the rear end cover body, when the "8"-shaped rotor rotates to the phase of the air inlet hole, the air inlet of the "8"-shaped rotor is communicated with the air inlet hole; the rear cooling water cavity is distributed on the inner end face of the rear end cover body, the rear cooling water cavity corresponds to the position of the cooling water cavity, the rear lubricating oil inner hole is also distributed on the inner end face of the rear end cover body, the rear lubricating oil outer holes are uniformly distributed on the outer end face of the rear end cover body, the rear lubricating oil outer holes are communicated with the rear lubricating oil inner hole, the rear bolt holes and the rear positioning pin holes are uniformly distributed on the edge of the rear end cover body, the rear bolt holes correspond to the position of the bolt holes, and the rear positioning pin holes correspond to the position of the positioning pin holes.

[0010] Preferably, the main shaft assembly comprises a front counterweight, a compression nut, a first flat key, a front half shaft, a rear half shaft, a flywheel, a second flat key and a nut, the front half shaft is sleeved with the front counterweight on the front side, the compression nut is sleeved on the front half shaft on the front side of the front counterweight to compress the front counterweight, the rear side of the front half shaft is connected with the front side of the rear half shaft through the first flat key, the rear side of the rear half shaft is sleeved with the flywheel, the flywheel is connected with the rear half shaft through the second flat key, and the rear half shaft on the rear side of the flywheel is locked by the nut; the axial direction of the front half shaft and the rear half shaft is further fixed by a shaft shoulder screw, the rear half shaft is internally provided with an axial oil channel and a radial oil channel, and the axial oil channel and the radial oil channel are communicated.

[0011] Preferably, the system also includes other accessories, including a retaining ring, ball bearing, spark plugs, fuel injectors, internal gear, exhaust manifold, needle roller bearing, fixing bolts, locating pins, oil seals, external gear, a first intake manifold, and a second intake manifold. The retaining ring is fitted onto the rear half-shaft, slightly towards the rear, and installed in the retaining ring groove. The ball bearing is fitted onto the rear half-shaft to the right of the retaining ring and installed in the bearing hole. The oil seal is fitted onto the rear half-shaft to the right of the ball bearing. Three spark plugs are provided, each installed on one of the three sides of the triangular cylinder block, with the spark plug heads penetrating into the combustion chamber. The fuel injectors are installed at the fuel injector mounting base, with the injector head passing through the fuel injector mounting hole into the combustion chamber. The internal gear is connected to the gear bolt via bolts. The hole is fixed to the inner end face of the front cover body. The external gear is fitted on the front side of the rear half shaft. The external gear is fixed to the figure-eight rotor by a spring pin. The internal gear meshes with the external gear. There are three exhaust manifolds. The three exhaust manifolds are respectively installed at the exhaust port. The needle roller bearing is fitted between the figure-eight rotor and the rear half shaft. The radial oil passage corresponds to the position of the needle roller bearing. The fixing bolts pass through the front bolt hole, the bolt hole and the rear bolt hole in sequence to bolt the front cover assembly, the cylinder assembly and the rear cover assembly. The positioning pin passes through the front positioning pin hole, the positioning pin hole and the rear positioning pin hole in sequence to position the front cover assembly, the cylinder assembly and the rear cover assembly. The first intake manifold is connected to the second intake manifold. The other end of the second intake manifold is connected to the intake port.

[0012] Preferably, there are three sets of radial seals, each including a radial spring and a radial sealing strip. The radial spring and the radial sealing strip are installed in the radial seal mounting groove, and the radial sealing strip confines the radial spring within the radial seal mounting groove. There are two sets of end face seals, each including an end face spring and an end face sealing strip. The two ends of the figure-eight rotor are respectively provided with end face seal mounting grooves, and the end face spring and the end face sealing strip are installed in the end face seal mounting groove, with the end face sealing strip confining the end face spring within the end face seal mounting groove.

[0013] Preferably, the triangular cylinder body, the front cover body, and the rear cover body are all triangular-like structures. The triangular-like structure is formed by three long sides and three short sides connected at intervals. A front positioning pin hole or a positioning pin hole or a rear positioning pin hole is opened at the center of the three long sides. A front bolt hole or a bolt hole or a rear bolt hole is opened at the junction of adjacent two sides. Lubricating oil passages are opened on the three long sides of the triangular cylinder body, and spark plug mounting holes are opened on the three short sides of the triangular cylinder body for installing spark plugs.

[0014] Preferably, the three semi-circular cavities are formed by connecting three semi-circular cavities, and each of the three semi-circular cavities has a combustion chamber at its top, and a radial seal is provided at the connection point of the three semi-circular cavities.

[0015] Preferably, a method for operating a novel rotary engine structure includes the following steps:

[0016] Step 1: Assemble the novel rotary engine structure. The three tops of the three semi-circular cavities 108 are respectively provided with combustion chambers 103. Each combustion chamber 103 is provided with a spark plug 803 and an injector 804. The spark plugs 803 of the three combustion chambers 103 are ignited at intervals. At the same time as ignition, the injector 804 injects fuel. The three semi-circular cavities 108 are divided into three working chambers by the figure-eight rotor 501. When the combustion chamber 103 in one working chamber is ignited, the other two working chambers are one for intake and one for exhaust.

[0017] Step 2: When the first intake manifold 812 is inlet, the gas enters the intake port of the figure-eight rotor 501 through the intake port 301. As the figure-eight rotor 501 begins to rotate slowly counterclockwise, the space of the first chamber is compressed. When the space of the first chamber is compressed to its minimum, the first combustion chamber 103, which is against one end of the figure-eight rotor 501, is ignited. The gas expands rapidly, pushing the figure-eight rotor 501 to rotate rapidly, so that the outlet of the figure-eight rotor 501 is connected to the exhaust port 201, and the gas is discharged.

[0018] Step 3: Next, the air inlet of the rotating figure-eight rotor 501 is connected to the air inlet 301 to allow air to enter. The figure-eight rotor 501 compresses the space of the second chamber. When the space of the second chamber is compressed to its minimum, the second combustion chamber 103, which is against one end of the figure-eight rotor 501, is ignited. The gas expands rapidly, pushing the figure-eight rotor 501 to rotate rapidly, so that the air outlet of the figure-eight rotor 501 is connected to the exhaust port 201, and the gas is discharged.

[0019] Step 4: Next, the air inlet of the rotating figure-eight rotor 501 connects with the air inlet 301 to allow air to enter. The figure-eight rotor 501 compresses the space of the third chamber. When the space of the third chamber is compressed to its minimum, the third combustion chamber 103, which is against one end of the figure-eight rotor 501, is ignited. The gas expands rapidly, pushing the figure-eight rotor 501 to rotate quickly, so that the air outlet of the figure-eight rotor 501 connects with the exhaust port 201, and the gas is discharged.

[0020] Step 5: As the figure-eight rotor 501 rotates rapidly, it drives the main shaft assembly 4 to rotate rapidly as well. Since the internal gear 805 is fixed to the inner end face of the front cover body 210 by bolts and gear bolt holes 206, and the external gear 811 is fitted on the front side of the rear half shaft 406, the external gear 811 is fixed to the figure-eight rotor 501 by spring pins, and the internal gear 805 meshes with the external gear 811, the figure-eight rotor 501 rotates counterclockwise 1 revolution, and the main shaft assembly 4 rotates clockwise 2 revolutions.

[0021] Compared with the prior art, the advantages of the present invention are as follows:

[0022] (1) This invention discloses a novel rotary engine structure, similar to the Wankel rotary engine with internal and external swaps. Its rotor is elliptical "8" shaped, and the cylinder is triangular. This combination increases the volume difference, which can significantly increase the compression ratio and greatly improve the thermal efficiency. Based on inheriting many advantages of the traditional Wankel rotary engine, this invention effectively solves the disadvantage of low thermal efficiency caused by the low compression ratio of the traditional triangular rotary engine. It has better power efficiency and a larger power spectrum in a small volume.

[0023] (2) The rotor engine of the present invention has three combustion chambers at the top of the three semi-circular cavities. Each combustion chamber is equipped with a spark plug and an injector. The spark plugs of the three combustion chambers are ignited at intervals. At the same time as the ignition, the injectors are ignited. The three combustion chambers are ignited at intervals to avoid excessive local temperature of the cylinder, improve the thermal stress state of the cylinder, avoid the cylinder sealing failure caused by excessive local thermal deformation, and prevent the power drop phenomenon, thereby improving the fatigue life of the engine.

[0024] (3) The internal gear of the present invention is fixed to the inner end face of the front cover body by bolts and gear bolt holes, and the external gear is fixed to the figure-eight rotor by spring pins. The internal gear and the external gear mesh with each other and the gear ratio is 3:2. Therefore, the figure-eight rotor rotates counterclockwise 1 turn and the main shaft assembly rotates clockwise 2 turns, which improves the low-speed torque characteristics of the engine.

[0025] (4) The rotary engine of the present invention includes an elliptical figure-eight rotor and a triangular cylinder. The engine has fewer moving parts, and the lubrication of the radial seals is greatly improved. The seals at the top of the traditional triangular rotor are replaced with radial seals at the three semi-circular cavities. The moving parts are transformed into fixed parts, and the radial seals are independently lubricated, so that it has better power, economy and reliability when it is running. It has great potential in aviation system applications.

[0026] (5) When the rotary engine of the present invention is running, the air-fuel mixture enters through the “8”-shaped rotor and compresses the cylinder to do work, and then exhausts through the “8”-shaped rotor. The engine is more compact overall, has a higher power density, and has better power, economy and thermal efficiency. Attached Figure Description

[0027] Figure 1 A three-dimensional structural diagram of a novel rotary engine structure according to the present invention;

[0028] Figure 2 A cross-sectional view of a novel rotary engine structure according to the present invention;

[0029] Figure 3 A schematic diagram of the cylinder block assembly structure of a novel rotary engine according to the present invention;

[0030] Figure 4 A schematic diagram of the front cover assembly structure of a novel rotary engine according to the present invention;

[0031] Figure 5 A schematic diagram of the front cover assembly structure of a novel rotary engine according to the present invention;

[0032] Figure 6 A schematic diagram of the rear end cover assembly structure of a novel rotary engine according to the present invention;

[0033] Figure 7 A schematic diagram of the rear end cover assembly structure of a novel rotary engine according to the present invention;

[0034] Figure 8 A schematic diagram of the main shaft assembly structure of a novel rotary engine structure according to the present invention.

[0035] Explanation of reference numerals in the attached figures:

[0036] 1. Cylinder block assembly; 2. Front end cover assembly; 3. Rear end cover assembly; 4. Main shaft assembly; 5. Rotor assembly; 6. Radial seals; 7. End face seals; 8. Other accessories.

[0037] 101. Lubricating oil passage; 102. Injector mounting hole; 103. Combustion chamber; 104. Cooling water chamber; 105. Locating pin hole; 106. Triangular cylinder body; 107. Radial seal mounting groove; 108. Three semi-circular cavities; 109. Bolt hole.

[0038] 201. Exhaust port; 202. Front lubricating oil outer hole; 203. Injector mounting bracket; 204. Front cooling water chamber; 205. Front lubricating oil inner hole; 206. Gear bolt hole; 207. Front locating pin hole; 208. Front bolt hole; 209. Front center hole; 210. Front end cover body.

[0039] 301. Air inlet; 302. Rear cooling water chamber; 303. Rear lubricating oil inner hole; 304. Retaining ring groove; 305. Bearing hole; 306. Rear lubricating oil outer hole; 307. Rear bolt hole; 308. Rear locating pin hole; 309. Rear center hole; 310. Rear end cover body.

[0040] 401. Front counterweight; 402. Compression nut; 403. Shoulder screw; 404. First flat key; 405. Front half shaft; 406. Rear half shaft; 407. Axial oil passage; 408. Flywheel; 409. Second flat key; 410. Nut; 411. Radial oil passage.

[0041] 501, Figure-8 shaped rotor; 502, End face seal mounting groove;

[0042] 601. Radial spring; 602. Radial sealing strip;

[0043] 701. End face spring; 702. End face sealing strip;

[0044] 801. Retaining ring; 802. Ball bearing; 803. Spark plug; 804. Injector; 805. Internal gear; 806. Exhaust manifold; 807. Needle roller bearing; 808. Fixing bolt; 809. Locating pin; 810. Oil seal; 811. External gear; 812. First intake manifold; 813. Second intake manifold. Detailed Implementation

[0045] The specific implementation of the present invention is described below with reference to embodiments:

[0046] It should be noted that the structures, proportions, sizes, etc. shown in this specification are only used to complement the content disclosed in the specification for those skilled in the art to understand and read, and are not intended to limit the conditions under which the present invention can be implemented. Any modifications to the structure, changes in the proportions, or adjustments to the size, without affecting the effects and objectives that the present invention can produce, should still fall within the scope of the technical content disclosed in the present invention.

[0047] Example 1

[0048] like Figure 1 , 2 As shown, a novel rotary engine structure includes a cylinder block assembly 1, a front end cover assembly 2, a rear end cover assembly 3, a main shaft assembly 4, and a rotor assembly 5. The cylinder block assembly 1, front end cover assembly 2, and rear end cover assembly 3 are all triangular-like structures. The cylinder block assembly 1 has a three-semi-circular cavity 108 at its center, and radial seals 6 are respectively installed at the junctions of the three semicircles of the three-semi-circular cavity 108. The front end cover assembly 2 has a front center hole 209 at its center, and the rear end cover assembly 3 has a rear center hole 309 at its center. The front center hole 209, the three-semi-circular cavity 108, and... The rear center hole 309 is coaxially arranged, and the cylinder block assembly 1, the front end cover assembly 2 and the rear end cover assembly 3 are fixedly connected to form the engine body. The rotor assembly 5 includes an "8" shaped rotor 501. The two ends of the "8" shaped rotor 501 are respectively provided with end face seals 7. The "8" shaped rotor 501 is arranged in the three semi-circular cavities 108. The main shaft assembly 4 passes through the front center hole 209 of the front end cover assembly 2, the center of the "8" shaped rotor 501 in the cylinder block assembly 1 and the rear center hole 309 of the rear end cover assembly 3 in sequence, and the two ends of the main shaft assembly 4 are limited.

[0049] Example 2

[0050] like Figure 3 As shown, the cylinder assembly 1 includes a lubricating oil passage 101, an injector mounting hole 102, a combustion chamber 103, a cooling water chamber 104, a locating pin hole 105, a triangular cylinder body 106, a radial seal mounting groove 107, and bolt holes 109. The triangular cylinder body 106 has a three-semi-circular cavity 108 at its center. The three tops of the three-semi-circular cavities 108 each have a combustion chamber 103. The combustion chamber 103 has an injector mounting hole 102 on the side near the front end cover assembly 2. The three-semi-circular cavities 104... Radial seal mounting grooves 107 are respectively provided at the three semicircular junctions of the 8, and radial seals 6 are installed in the radial seal mounting grooves 107. Lubricating oil passages 101 are provided on the three outer walls of the triangular cylinder body 106, and the lubricating oil passages 101 are connected to the radial seal mounting grooves 107. Cooling water chambers 104 are evenly distributed on the triangular cylinder body 106 around the three semicircular cavities 108. Positioning pin holes 105 and bolt holes 109 are evenly distributed on the edge of the triangular cylinder body 106.

[0051] The triangular cylinder body 106 has regularly distributed cooling water chambers 104 on its two end faces to cool the cylinder surface temperature during engine operation and reduce the heat load on the combustion chamber. The three semicircular cavities 108 have radial seal mounting grooves 107 at the junction of the three semicircles to install radial seals 6, reducing or preventing radial air leakage in the combustion chamber. The triangular cylinder body 106 has lubrication oil passages 101 to supply the radial seal mounting grooves 107 with an appropriate amount of lubricating oil to lubricate and cool the radial seals 6, reducing wear on the radial seals 6. The positioning pin holes 105 are used to ensure the assembly positions of the cylinder assembly 1, the front cover assembly 2, and the rear cover assembly 3.

[0052] Example 3

[0053] like Figure 4 , 5As shown, the front cover assembly 2 includes an exhaust port 201, a front lubricating oil outer hole 202, an injector mounting seat 203, a front cooling water chamber 204, a front lubricating oil inner hole 205, a gear bolt hole 206, a front locating pin hole 207, a front bolt hole 208, a front center hole 209, and a front cover body 210. The front cover body 210 has a center hole 209 at its center, and gear bolt holes 206 are distributed circumferentially around the center hole 209. Three exhaust ports 201 are evenly distributed around the front center hole 209 on the front cover body 210. When the figure-eight rotor 501 rotates to the phase of the exhaust port 201, the exhaust port of the figure-eight rotor 501 communicates with the exhaust port 201. Three injector mounting seats 203 are evenly distributed along the edge of the front cover body 210. 03. The three injector mounting seats 203 correspond to the positions of the three injector mounting holes 102. The outer end face of the front cover body 210 has a front lubricating oil outer hole 202 and the inner end face of the front cover body 210 has a front lubricating oil inner hole 205. The front lubricating oil outer hole 202 and the front lubricating oil inner hole 205 are connected. The position of the front lubricating oil inner hole 205 corresponds to the position of the end face seal 7. The inner end face of the front cover body 210 also has a front cooling water cavity 204, which corresponds to the position of the cooling water cavity 104. The edge of the front cover body 210 has a front positioning pin hole 207 and a front bolt hole 208 evenly distributed. The position of the front positioning pin hole 207 corresponds to the position of the positioning pin hole 105, and the position of the front bolt hole 208 corresponds to the position of the bolt hole 109.

[0054] The three exhaust holes 201 are evenly distributed on the front cover body 210, forming an exhaust channel with the exhaust manifold 806 and the figure-eight rotor 501. The three injector mounting seats 203 are distributed on the outer side of the front cover body 210. The front center hole 209 is used to install the main shaft bearing. The front lubricating oil outer hole 202 and the front lubricating oil inner hole 205 are connected for lubricating and cooling the end face seal 7. The front cooling water chamber 204 is connected to the cooling water chamber 104 and the rear cooling water chamber 302 to form a cooling water channel. The three gear bolt holes 206 are distributed on the inner side of the body 2 for installing the internal gear 805.

[0055] Example 4

[0056] like Figure 6 , 7As shown, the rear end cover assembly 3 includes an air inlet 301, a rear cooling water chamber 302, a rear lubricating oil inner hole 303, a retaining ring groove 304, a bearing hole 305, a rear lubricating oil outer hole 306, a rear bolt hole 307, a rear locating pin hole 308, a rear center hole 309, and a rear end cover body 310. The rear end cover body 310 has a rear center hole 309 at its center. The inner ring of the rear center hole 309 is provided with a retaining ring groove 304 and a bearing hole 305. Three air inlets 301 are evenly distributed around the rear center hole 309 on the rear end cover body 310. When the figure-eight rotor 501 rotates to the phase of the air inlet 301, the figure-eight rotor 501... The air inlet of 01 is connected to the air inlet hole 301; the rear cooling water cavity 302 is distributed on the inner end face of the rear end cover body 310, and the rear cooling water cavity 302 is corresponding to the cooling water cavity 104. The rear lubricating oil inner hole 303 is also distributed on the inner end face of the rear end cover body 310. The rear lubricating oil outer hole 306 is evenly distributed on the outer end face of the rear end cover body 310, and the rear lubricating oil outer hole 306 is connected to the rear lubricating oil inner hole 303. The rear bolt hole 307 and the rear positioning pin hole 308 are evenly distributed on the edge of the rear end cover body 310. The rear bolt hole 307 is corresponding to the bolt hole 109, and the rear positioning pin hole 308 is corresponding to the positioning pin hole 105.

[0057] The front cooling water chamber 204, cooling water chamber 104 and rear cooling water chamber 302 are connected to reduce the thermal load on the triangular cylinder body 106.

[0058] The rear cover body 310 has three air inlets 301 on its outer side, which together with the figure-eight rotor 501 form an air intake channel. The front cover body 210 and the rear cover body 310 are provided with lubricating oil channels for lubricating the main shaft assembly 4 bearing and cooling water chambers for water return.

[0059] The rear end cover body 310 is provided with a bearing hole 305 and a retaining ring groove 304 for bearing installation and positioning. The rear end cover body 310 is provided with a communicating rear lubricating oil inner hole 303 and a rear lubricating oil outer hole 306 for supplying oil lubrication to the end face seal 7.

[0060] Example 5

[0061] like Figure 8As shown, the spindle assembly 4 includes a front counterweight 401, a clamping nut 402, a first flat key 404, a front half-shaft 405, a rear half-shaft 406, a flywheel 408, a second flat key 409, and a nut 410. The front counterweight 401 is sleeved on the front side of the front half-shaft 405. The clamping nut 402 is sleeved on the front half-shaft 405 in front of the front counterweight 401 to clamp the front counterweight 401. The rear side of the front half-shaft 405 and the front side of the rear half-shaft 406 are connected by the first flat key 404. The rear half-shaft 406 is keyed together with a flywheel 408 mounted on its rear side. The flywheel 408 and the rear half-shaft 406 are connected by a second flat key 409. The rear half-shaft 406 behind the flywheel 408 is locked with a nut 410. The axial direction of the front half-shaft 405 and the rear half-shaft 406 is also fixed by a shoulder screw 403. The rear half-shaft 406 has an axial oil passage 407 and a radial oil passage 411 inside, and the axial oil passage 407 and the radial oil passage 411 are connected.

[0062] The front half-shaft 405 is provided with threaded holes and keyways near its axis. It is connected to and positioned with the rear half-shaft 406 by a shoulder screw 403 and a first flat key 404. The front half-shaft 405 is provided with a retaining ring groove to limit the axial position of the front main bearing. The rear half-shaft 406 is provided with an axial oil passage 407 and a radial oil passage 411 to supply lubricating oil to the needle roller bearing 807.

[0063] The main shaft assembly 4 is a two-section type. The main shaft is divided into two ends at the free end bearing for easy disassembly and assembly. The two halves of the shaft are axially equipped with flat keys to constrain the axial free end. A shoulder screw 403 is provided axially to limit the axial free end and prevent the main shaft from disengaging during operation. An eccentric shaft section is provided on the main shaft to transmit the mechanical energy of the rotor during operation. Bearing retaining ring grooves and shoulders are provided at corresponding positions on the main shaft. The main shaft is provided with an axial oil passage 407 and a radial oil passage 411 to provide lubrication and cooling for the rotor bearing and the end cover bearing. The main shaft is equipped with front and rear counterweights at both ends. The drive end counterweight is integrated with the flywheel to balance the bearing imbalance and reduce the speed fluctuation rate.

[0064] Example 6

[0065] like Figure 2As shown, it also includes other accessories 8, including retaining ring 801, ball bearing 802, spark plug 803, fuel injector 804, internal gear 805, exhaust manifold 806, needle roller bearing 807, fixing bolt 808, locating pin 809, oil seal 810, external gear 811, first intake manifold 812 and second intake manifold 813. The retaining ring 801 is fitted onto the rear half-shaft 406 in the middle rearward side and installed in the retaining ring groove 304. The ball bearing 802 is fitted onto the retaining ring 801. The oil seal 810 is fitted onto the right rear half-shaft 406 and installed inside the bearing bore 305. Three spark plugs 803 are installed on the three sides of the triangular cylinder body 106, with the spark plug heads penetrating into the combustion chamber 103. The fuel injector 804 is installed at the fuel injector mounting seat 203, with the injector head passing through the fuel injector mounting hole 102 and penetrating into the combustion chamber 103. The internal gear 805 is fixed to the inner end face of the front cover body 210 by bolts engaging with the gear bolt hole 206. The external gear 811 is fitted onto the front side of the rear half-shaft 406 and is fixed to the figure-eight rotor 501 by spring pins. The internal gear 805 meshes with the external gear 811. There are three exhaust manifolds 806, which are respectively installed at the exhaust port 201. The needle roller bearing 807 is fitted onto the figure-eight rotor 501 and the rear half-shaft 406. In between, the fixing bolts 808 pass through the front bolt hole 208, bolt hole 109 and rear bolt hole 307 in sequence to bolt the front cover assembly 2, cylinder body assembly 1 and rear cover assembly 3 together. The positioning pins 809 pass through the front positioning pin hole 207, positioning pin hole 105 and rear positioning pin hole 308 in sequence to position the front cover assembly 2, cylinder body assembly 1 and rear cover assembly 3 together. The first intake manifold 812 is connected to the second intake manifold 813, and the other end of the second intake manifold 813 is connected to the intake port 301.

[0066] The figure-eight rotor 501 has two grooves on its two end faces for installing end face seals 7 to prevent air leakage from the combustion chamber end face. The figure-eight rotor 501 has inlet and outlet ports, which work in conjunction with the end caps to form a stable inlet and outlet phase and inlet and outlet passage. The figure-eight rotor 501 has positioning holes for installing external gears 811, which work in conjunction with internal gears 805 to define the rotor's motion pattern.

[0067] Three exhaust manifolds 806, internal gear 805, and three fuel injectors 804 are integrated and mounted on the front cover body 210; the second intake manifold 813 is bolted to the rear cover body 310; the external gear 811 is fixed to the figure-eight rotor 501 by spring pins; the end face spring 701 and the end face sealing strip 702 are integrated and mounted on the two end faces of the figure-eight rotor 501; the engine assembly uses fixing bolts 808 and positioning pins 809 to assemble, connect, and position the cylinder block assembly 1, the front cover assembly 2, and the rear cover assembly 3.

[0068] Example 7

[0069] like Figure 2 As shown, the radial seal 6 consists of three sets, each including a radial spring 601 and a radial sealing strip 602. The radial spring 601 and the radial sealing strip 602 are installed in the radial seal mounting groove 107, and the radial sealing strip 602 confines the radial spring 601 within the radial seal mounting groove 107. The end face seal 7 consists of two sets, each including an end face spring 701 and an end face sealing strip 702. The two ends of the figure-eight rotor 501 are respectively provided with end face seal mounting grooves 502, and the end face spring 701 and the end face sealing strip 702 are installed in the end face seal mounting grooves 502, with the end face sealing strip 702 confining the end face spring 701 within the end face seal mounting groove 502.

[0070] The radial seal 6 and the end face seal 7 are used to seal the working chamber (the cavity formed by the cylinder / rotor and the front and rear end covers) to prevent combustion chamber leakage.

[0071] like Figures 3-7 As shown, the triangular cylinder body 106, the front cover body 210, and the rear cover body 310 are all triangular-like structures. The triangular-like structure is formed by three long sides and three short sides connected at intervals. A front positioning pin hole 207 or positioning pin hole 105 or a rear positioning pin hole 308 is opened at the center of the three long sides. A front bolt hole 208 or bolt hole 109 or a rear bolt hole 307 is opened at the junction of adjacent two sides. Lubricating oil passages 101 are opened on the three long sides of the triangular cylinder body 106, and spark plug mounting holes are opened on the three short sides of the triangular cylinder body 106 for installing spark plugs 803.

[0072] like Figure 3 As shown, the three semi-circular cavities 108 are formed by connecting three semi-circular cavities. The top of each of the three semi-circular cavities is provided with a combustion chamber 103, and a radial seal 6 is provided at the connection of the three semi-circular cavities.

[0073] Example 8

[0074] This invention discloses a working method for a novel rotary engine structure, comprising the following steps:

[0075] Step 1: Assemble the novel rotary engine structure. The three tops of the three semi-circular cavities 108 are respectively provided with combustion chambers 103. Each combustion chamber 103 is provided with a spark plug 803 and an injector 804. The spark plugs 803 of the three combustion chambers 103 are ignited at intervals. At the same time as ignition, the injector 804 injects fuel. The three semi-circular cavities 108 are divided into three working chambers by the figure-eight rotor 501. When the combustion chamber 103 in one working chamber is ignited, the other two working chambers are one for intake and one for exhaust.

[0076] Step 2: When the first intake manifold 812 is inlet, the gas enters the intake port of the figure-eight rotor 501 through the intake port 301. As the figure-eight rotor 501 begins to rotate slowly counterclockwise, the space of the first chamber is compressed. When the space of the first chamber is compressed to its minimum, the first combustion chamber 103, which is against one end of the figure-eight rotor 501, is ignited. The gas expands rapidly, pushing the figure-eight rotor 501 to rotate rapidly, so that the outlet of the figure-eight rotor 501 is connected to the exhaust port 201, and the gas is discharged.

[0077] Step 3: Next, the air inlet of the rotating figure-eight rotor 501 is connected to the air inlet 301 to allow air to enter. The figure-eight rotor 501 compresses the space of the second chamber. When the space of the second chamber is compressed to its minimum, the second combustion chamber 103, which is against one end of the figure-eight rotor 501, is ignited. The gas expands rapidly, pushing the figure-eight rotor 501 to rotate rapidly, so that the air outlet of the figure-eight rotor 501 is connected to the exhaust port 201, and the gas is discharged.

[0078] Step 4: Next, the air inlet of the rotating figure-eight rotor 501 connects with the air inlet 301 to allow air to enter. The figure-eight rotor 501 compresses the space of the third chamber. When the space of the third chamber is compressed to its minimum, the third combustion chamber 103, which is against one end of the figure-eight rotor 501, is ignited. The gas expands rapidly, pushing the figure-eight rotor 501 to rotate quickly, so that the air outlet of the figure-eight rotor 501 connects with the exhaust port 201, and the gas is discharged.

[0079] Step 5: As the figure-eight rotor 501 rotates rapidly, it drives the main shaft assembly 4 to rotate rapidly as well. Since the internal gear 805 is fixed to the inner end face of the front cover body 210 by bolts and gear bolt holes 206, and the external gear 811 is fitted on the front side of the rear half shaft 406, the external gear 811 is fixed to the figure-eight rotor 501 by spring pins, and the internal gear 805 meshes with the external gear 811, the figure-eight rotor 501 rotates counterclockwise 1 revolution, and the main shaft assembly 4 rotates clockwise 2 revolutions.

[0080] In a traditional rotary engine, the external gear is stationary and does not rotate, while the internal gear is fixed to the rotor and rotates with it. Therefore:

[0081] w 内 / w 外 =2 / 3

[0082] (w) 内 -w) / (w 外 -w) = 2 / 3

[0083] At this time w 外 =0

[0084] w=3w 内

[0085] Therefore, the eccentric shaft and the triangular rotor are in the same direction. In a traditional rotary engine, the triangular rotor rotates 1 revolution while the eccentric shaft rotates 3 revolutions.

[0086] In this invention, the internal and external gears are adjusted. The external gear is fixed to the figure-eight rotor by a spring pin, and the internal gear is fixed to the front cover body and remains stationary. Therefore:

[0087] w 内 / w 外 =2 / 3

[0088] (w) 内 -w) / (w 外 -w) = 2 / 3

[0089] At this time w 内 =0

[0090] -w=2w 外

[0091] Therefore, the figure-eight rotor and the main shaft assembly of this invention are in opposite directions. The figure-eight rotor rotates counterclockwise once, and the main shaft assembly rotates clockwise twice. This can improve the torque characteristics of the engine at low speeds, enabling the engine to have greater torque at low speeds and further expanding the application range of the engine.

[0092] The working principle of this invention is as follows:

[0093] like Figure 1 , 2As shown, this invention discloses a novel rotary engine structure, including a cylinder assembly 1, a front cover assembly 2, a rear cover assembly 3, a main shaft assembly 4, and a rotor assembly 5. The cylinder assembly 1, the front cover assembly 2, and the rear cover assembly 3 are bolted together to form the engine body. The main shaft assembly 4 passes sequentially through the front center hole 209 of the front cover assembly 2, the center of the figure-eight rotor 501 in the cylinder assembly 1, and the rear center hole 309 of the rear cover assembly 3. The main shaft assembly 4 is limited at both ends. This invention uses a figure-eight rotor 501 and a three-semi-circular cavity 108 for cooperation. This cooperation increases the volume difference, improves the compression ratio, and greatly improves the thermal efficiency. This invention has fewer moving parts in the engine, especially the radial seal 6, whose lubrication is greatly improved. The radial seal 6 is transformed from a moving part into a fixed part. When the engine is running, the air-fuel mixture enters through the rotor, compresses the cylinder to perform work, and then exits through the rotor to exhaust the exhaust gas. The engine is more compact overall, has a higher power density, and has better power, economy, and thermal efficiency.

[0094] This invention discloses a novel rotary engine structure, similar to a Wankel rotary engine with internal and external components swapped. Its rotor is elliptical "8" shaped, while the cylinder block is triangular. This combination increases the volume difference, which can significantly increase the compression ratio and greatly improve thermal efficiency. While inheriting many advantages of the traditional Wankel rotary engine, this invention effectively solves the problem of low thermal efficiency caused by the low compression ratio of the traditional triangular rotary engine. It has better power efficiency and a larger power spectrum in a smaller volume.

[0095] The rotary engine of this invention has combustion chambers at the top of its three semi-circular cavities. Each combustion chamber is equipped with a spark plug and a fuel injector. The spark plugs in the three combustion chambers ignite at intervals, and the fuel injectors ignite simultaneously. This intermittent ignition of the three combustion chambers avoids excessive local temperature in the cylinder block, improves the thermal stress state of the cylinder block, prevents cylinder block sealing failure due to excessive local thermal deformation, avoids power reduction, and improves the fatigue life of the engine.

[0096] In this invention, the internal gear is fixed to the inner end face of the front cover body by bolts and gear bolt holes, and the external gear is fixed to the figure-eight rotor by spring pins. The internal gear and the external gear mesh with each other, and their gear ratio is 3:2. Therefore, when the figure-eight rotor rotates counterclockwise once, the main shaft assembly rotates clockwise twice, which improves the low-speed torque characteristics of the engine.

[0097] The rotary engine of this invention includes an elliptical figure-eight rotor and a triangular cylinder. The engine has fewer moving parts, and the lubrication of the radial seals is greatly improved. The seals at the top of the traditional triangular rotor are replaced with radial seals at the three semi-circular cavities. The moving parts are transformed into fixed parts, and the radial seals are independently lubricated, which makes it have better power, economy and reliability during operation. It has great potential for application in aviation systems.

[0098] When the rotary engine of this invention is running, the air-fuel mixture enters through the figure-eight rotor, compresses the cylinder to do work, and then exits through the figure-eight rotor to exhaust the exhaust gas. The engine is more compact overall, has a higher power density, and has better power, economy and thermal efficiency.

[0099] The preferred embodiments of the present invention have been described in detail above. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention.

[0100] Many other changes and modifications can be made without departing from the concept and scope of this invention. It should be understood that this invention is not limited to the specific embodiments, and the scope of this invention is defined by the appended claims.

Claims

1. A novel structure of a rotary engine, characterized by: The application relates to a cylinder assembly (1), a front end cover assembly (2), a rear end cover assembly (3), a main shaft assembly (4) and a rotor assembly (5), wherein the cylinder assembly (1), the front end cover assembly (2) and the rear end cover assembly (3) are all triangular structures, a three-semi-circular cavity (108) is arranged in the center of the cylinder assembly (1), radial sealing elements (6) are arranged at the joints of the three semi-circles of the three-semi-circular cavity (108), a front center hole (209) is arranged in the center of the front end cover assembly (2), a rear center hole (309) is arranged in the center of the rear end cover assembly (3), the front center hole (209), the three-semi-circular cavity (108) and the rear center hole (309) are coaxially arranged, the cylinder assembly (1), the front end cover assembly (2) and the rear end cover assembly (3) are fixedly connected to form an engine body, the rotor assembly (5) comprises an "8" type rotor (501), end face sealing elements (7) are arranged at the two end faces of the "8" type rotor (501), the "8" type rotor (501) is arranged in the three-semi-circular cavity (108), the main shaft assembly (4) passes through the front center hole (209) of the front end cover assembly (2), the center of the "8" type rotor (501) in the cylinder assembly (1) and the rear center hole (309) of the rear end cover assembly (3) in sequence, and the main shaft assembly (4) is limited at both ends; The cylinder assembly (1) comprises lubricating oil channels (101), oil injector mounting holes (102), combustion chambers (103), cooling water cavities (104), positioning pin holes (105), a triangular cylinder body (106), radial sealing element mounting grooves (107) and bolt holes (109), the three-semi-circular cavity (108) is arranged in the center of the triangular cylinder body (106), combustion chambers (103) are arranged at the three top portions of the three-semi-circular cavity (108), the oil injector mounting holes (102) are arranged on the side, close to the front end cover assembly (2), of the combustion chambers (103), the radial sealing element mounting grooves (107) are arranged at the joints of the three semi-circles of the three-semi-circular cavity (108), the radial sealing elements (6) are arranged in the radial sealing element mounting grooves (107), the lubricating oil channels (101) are arranged on the three outer walls of the triangular cylinder body (106) and are communicated with the radial sealing element mounting grooves (107), the cooling water cavities (104) are uniformly distributed on the triangular cylinder body (106) around the three-semi-circular cavity (108), and the positioning pin holes (105) and the bolt holes (109) are uniformly distributed on the edges of the triangular cylinder body (106). The main shaft assembly (4) comprises a front counterweight (401), a compression nut (402), a first flat key (404), a front half shaft (405), a rear half shaft (406), a flywheel (408), a second flat key (409) and a nut (410), the front half shaft (405) is sleeved with the front counterweight (401) on the front side, the compression nut (402) is sleeved on the front half shaft (405) on the front side of the front counterweight (401) to compress the front counterweight (401), the rear side of the front half shaft (405) is connected with the front side of the rear half shaft (406) through the first flat key (404), the rear side of the rear half shaft (406) is sleeved with the flywheel (408), the flywheel (408) is connected with the rear half shaft (406) through the second flat key (409), and the rear half shaft (406) on the rear side of the flywheel (408) is locked with the nut (410); the axial direction of the front half shaft (405) and the rear half shaft (406) is further fixed through the shaft shoulder screw (403), and the inside of the rear half shaft (406) is provided with an axial oil channel (407) and a radial oil channel (411), and the axial oil channel (407) and the radial oil channel (411) are communicated.

2. A novel rotary engine structure according to claim 1, characterized in that: The front end cover assembly (2) comprises exhaust holes (201), front lubricating oil outer holes (202), oil injector mounting seats (203), front cooling water cavities (204), front lubricating oil inner holes (205), gear bolt holes (206), front positioning pin holes (207), front bolt holes (208), a front center hole (209) and a front end cover body (210), the center hole (209) is arranged in the center of the front end cover body (210), the gear bolt holes (206) are distributed in the inner side of the center hole (209) in the circumferential direction, the front end cover body (210) is uniformly provided with three exhaust holes (201) around the front center hole (209), when the "8" shaped rotor (501) rotates to the phase of the exhaust hole (201), the air outlet of the "8" shaped rotor (501) is communicated with the exhaust hole (201), the front end cover body (210) is uniformly provided with three oil injector mounting seats (203) at the edge, the three oil injector mounting seats (203) correspond to the positions of the three oil injector mounting holes (102), the front end cover body (210) is provided with the front lubricating oil outer holes (202) on the outer end face, the front end cover body (210) is provided with the front lubricating oil inner holes (205) on the inner end face, the front lubricating oil outer holes (202) and the front lubricating oil inner holes (205) are communicated, the position of the front lubricating oil inner holes (205) corresponds to the position of the end face sealing element (7), the front end cover body (210) is further provided with the front cooling water cavities (204) on the inner end face, the front cooling water cavities (204) correspond to the positions of the cooling water cavities (104), and the front end cover body (210) is uniformly provided with the front positioning pin holes (207) and the front bolt holes (208) at the edge, the front positioning pin holes (207) correspond to the positions of the positioning pin holes (105), and the front bolt holes (208) correspond to the positions of the bolt holes (109).

3. A novel rotary engine structure according to claim 2, characterized in that: The rear end cover assembly (3) comprises air inlet holes (301), a rear cooling water cavity (302), a rear lubricating oil inner hole (303), a retainer groove (304), a bearing hole (305), a rear lubricating oil outer hole (306), a rear bolt hole (307), a rear positioning pin hole (308), a rear center hole (309), and a rear end cover body (310). The rear center hole (309) is arranged in the center of the rear end cover body (310). The retainer groove (304) and the bearing hole (305) are arranged in the inner circle of the rear center hole (309). The three air inlet holes (301) are uniformly distributed on the periphery of the rear end cover body (310). When the "8" shaped rotor (501) rotates to the phase of the air inlet hole (301), the air inlet of the "8" shaped rotor (501) is communicated with the air inlet hole (301). The rear cooling water cavity (302) is distributed on the inner end surface of the rear end cover body (310). The rear cooling water cavity (302) corresponds to the position of the cooling water cavity (104). The rear lubricating oil inner hole (303) is also distributed on the inner end surface of the rear end cover body (310). The rear lubricating oil outer hole (306) is uniformly distributed on the outer end surface of the rear end cover body (310). The rear lubricating oil outer hole (306) is communicated with the rear lubricating oil inner hole (303). The rear bolt hole (307) and the rear positioning pin hole (308) are uniformly distributed on the edge of the rear end cover body (310). The rear bolt hole (307) corresponds to the position of the bolt hole (109). The rear positioning pin hole (308) corresponds to the position of the positioning pin hole (105).

4. A novel rotary engine structure according to claim 3, characterized in that: Also included are other accessories (8), which include a retaining ring (801), a ball bearing (802), a spark plug (803), an oil injector (804), an internal gear (805), an exhaust manifold (806), a needle bearing (807), a fixing bolt (808), a positioning pin (809), an oil seal (810), an external gear (811), a first intake manifold (812), and a second intake manifold (813), the retaining ring (801) is sleeved on the rear half shaft (406) at the middle rear side and is installed in the retaining ring groove (304), the ball bearing (802) is sleeved on the rear half shaft (406) at the right side of the retaining ring (801) and is installed in the bearing hole (305), the oil seal (810) is sleeved on the rear half shaft (406) at the right side of the ball bearing (802), the spark plug (803) is three, the three spark plugs (803) are respectively installed on the three sides of the triangular cylinder body (106), the head of the spark plug (803) penetrates into the inside of the combustion chamber (103), the oil injector (804) is installed at the oil injector mounting seat (203), and the head of the oil injector (804) penetrates into the inside of the combustion chamber (103) through the oil injector mounting hole (102), the internal gear (805) is fixed in the inner end face of the front end cover body (210) through cooperation of the gear bolt hole (206) and the bolt, the external gear (811) is sleeved on the front side of the rear half shaft (406), the external gear (811) is fixed on the "8" shaped rotor (501) through a spring pin, and the internal gear (805) is engaged with the external gear (811); the exhaust manifold (806) is three, the three exhaust manifolds (806) are respectively installed at the exhaust hole (201), the needle bearing (807) is sleeved between the "8" shaped rotor (501) and the rear half shaft (406), wherein the radial oil channel (411) corresponds to the position of the needle bearing (807), the fixing bolt (808) is sequentially threaded through the front bolt hole (208), the bolt hole (109), and the rear bolt hole (307) to bolt connect the front end cover assembly (2), the cylinder assembly (1), and the rear end cover assembly (3), the positioning pin (809) is sequentially threaded through the front positioning pin hole (207), the positioning pin hole (105), and the rear positioning pin hole (308) to position the front end cover assembly (2), the cylinder assembly (1), and the rear end cover assembly (3), the first intake manifold (812) is connected with the second intake manifold (813), and the other end of the second intake manifold (813) is connected with the intake hole (301).

5. A novel rotary engine structure according to claim 4, characterized in that: The radial seal (6) is three groups, the radial seal (6) includes radial spring (601) and radial seal strip (602), radial spring (601) and radial seal strip (602) are installed in radial seal installation groove (107), radial seal strip (602) limits radial spring (601) in radial seal installation groove (107), the end face seal (7) is two groups, the end face seal (7) includes end face spring (701) and end face seal strip (702), "8" type rotor (501) two end faces are provided with end face seal installation groove (502) respectively, end face spring (701) and end face seal strip (702) are installed in end face seal installation groove (502), and end face seal strip (702) limits end face spring (701) in end face seal installation groove (502).

6. A novel rotary engine structure according to claim 5, characterized in that: The triangular cylinder body (106), the front end cover body (210) and the rear end cover body (310) are all triangular structures, which are connected by three long sides and three short sides, the center of the three long sides is provided with a front positioning pin hole (207) or a positioning pin hole (105) or a rear positioning pin hole (308), and the junction of the adjacent two sides is provided with a front bolt hole (208) or a bolt hole (109) or a rear bolt hole (307), the three long sides of the triangular cylinder body (106) are respectively provided with lubricating oil channels (101), and the three short sides of the triangular cylinder body (106) are respectively provided with spark plug mounting holes for mounting spark plugs (803).

7. A novel rotary engine structure according to claim 6, characterized in that: The three semi-circular cavities (108) are connected by three semi-circular cavities, and the top of each semi-circular cavity is provided with a combustion chamber (103), and the connection of the three semi-circular cavities is provided with a radial seal (6).

8. A method of operating a novel rotary engine structure, characterized by, The steps include: Step 1: assemble the novel rotor engine structure of claim 7, three top parts of the three semi-circular cavities (108) are respectively provided with combustion chambers (103), each combustion chamber (103) is respectively provided with a spark plug (803) and an oil injector (804), the spark plugs (803) of the three combustion chambers (103) are ignited at intervals, and the oil injector (804) sprays oil at the same time, the three semi-circular cavities (108) are divided into three working chambers by the "8" type rotor (501), when the combustion chamber (103) in one of the working chambers ignites, the other two working chambers intake air and exhaust air; Step 2: when the first intake manifold (812) intakes air, the gas enters the intake port of the "8" type rotor (501) through the intake hole (301), as the "8" type rotor (501) starts to rotate counterclockwise slowly, the first working chamber space is compressed at this time, when the first working chamber space is compressed to the minimum, the first combustion chamber (103) at one end of the "8" type rotor (501) ignites, the gas expands rapidly, pushes the "8" type rotor (501) to rotate quickly, and the gas outlet of the "8" type rotor (501) is communicated with the exhaust hole (201), and the gas is discharged; Step 3: Then the air inlet of the rotating "8" shaped rotor (501) is communicated with the air inlet hole (301) again to take in air, and the "8" shaped rotor (501) compresses the second working chamber space, when the second working chamber space is compressed to the minimum, the second combustion chamber (103) abutting the one end of the "8" shaped rotor (501) is ignited, the gas expands rapidly, pushes the "8" shaped rotor (501) to rotate rapidly, so that the air outlet of the "8" shaped rotor (501) is communicated with the exhaust hole (201), and the gas is discharged; Step 4: Then the air inlet of the rotating "8" shaped rotor (501) is communicated with the air inlet hole (301) again to take in air, and the "8" shaped rotor (501) compresses the third working chamber space, when the third working chamber space is compressed to the minimum, the third combustion chamber (103) abutting the one end of the "8" shaped rotor (501) is ignited, the gas expands rapidly, pushes the "8" shaped rotor (501) to rotate rapidly, so that the air outlet of the "8" shaped rotor (501) is communicated with the exhaust hole (201), and the gas is discharged; Step 5: With the rapid rotation of the "8" shaped rotor (501), the main shaft assembly (4) is also rapidly rotated, since the inner gear (805) is fixed in the inner end face of the front end cover body (210) through bolts matched with the gear bolt holes (206), the outer gear (811) is sleeved on the front side of the rear half shaft (406), the outer gear (811) is fixed on the "8" shaped rotor (501) through the spring pin, and the inner gear (805) is engaged with the outer gear (811), therefore, the "8" shaped rotor (501) rotates counterclockwise by one circle, and the main shaft assembly (4) rotates clockwise by two circles.

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