CN115788661A

CN115788661A - Piston circular motion rotor engine

Info

Publication number: CN115788661A
Application number: CN202211453326.0A
Authority: CN
Inventors: 丁杰
Original assignee: Xi'an Dingjie Power Technology Co ltd
Current assignee: Xi'an Dingjie Power Technology Co ltd
Priority date: 2022-11-21
Filing date: 2022-11-21
Publication date: 2023-03-14

Abstract

The invention belongs to the technical field of engines, and particularly discloses a piston circular motion rotor engine which comprises two sets of main engine systems and one set of auxiliary engine system, wherein the two sets of main engine systems are respectively a rotor compressor system, a rotor engine system and other matching systems for gas distribution, oil supply, ignition and the like. The rotor compressor system and the rotor engine system respectively comprise a cylinder barrel, a piston, a central rotor and a sealing assembly; the rotor compressor system has the functions of realizing air compression and providing high-temperature and high-pressure air for the engine; the rotor engine system has the function of realizing explosive combustion and external work application of mixed oil gas in an engine combustion chamber; the air distribution, oil supply and actuating mechanism consists of a valve, a cam and an air distribution actuating mechanism and has the functions of matching with the engine to realize oil injection, ignition and combustion. In the process that the rotor shaft rotates 360 degrees, the rotor shaft of the engine rotates for a circle to do work twice, namely, the rotor shaft of the engine does work twice in 1/2 stroke, the same rotor shaft of the engine can be connected with a plurality of groups of compression cavities and combustion chambers in series, and the work is increased according to multiples.

Description

Piston circular motion rotor engine

Technical Field

The invention belongs to the technical field of engines, and particularly relates to a piston circular motion rotor engine.

Background

At present, there are two main types of engines that do work through output shaft torque: reciprocating piston engines and delta rotor engines.

The reciprocating piston engine is characterized in that fuel oil is mixed with high-temperature and high-pressure air in an engine combustion chamber, the mixture is ignited or compression-ignited, heat energy and pressure energy are released to push a piston to output torque to do work through a connecting rod and a crankshaft, and the representative reciprocating piston engine mainly comprises four strokes and two strokes. The main disadvantages are as follows: large volume, large vibration, low efficiency and small power-weight ratio.

The triangle rotor engine has the advantages of small compression ratio, insufficient combustion, quick abrasion of the radial sealing sheet, short service life of parts and difficult engine maintenance due to the unique mechanical structure.

Existing engine devices have difficulty meeting the requirements of machine devices that are required to provide shaft torque.

Disclosure of Invention

The invention aims to overcome the defects in the prior art and provides a piston circular motion rotor engine.

The invention provides a piston circular motion rotor engine, which comprises an engine assembly consisting of parts and components such as an engine system, a compressor system, a cam valve actuating mechanism and the like, wherein the cam valve actuating mechanism is fixed between the engine system and the compressor system and is used for controlling the opening and closing of an air inlet channel between the engine system and the compressor system; the engine system and the compressor system are connected through a rotor shaft;

the rotor shaft penetrates through the engine system and the compressor system, one side of the rotor shaft, which is close to the engine system, is connected with an external acting component through a speed increaser, the other side of the rotor shaft is sleeved with a synchronous belt wheel, the synchronous belt wheel is connected with a cam shaft of a cam gas distribution mechanism through a synchronous belt, and the end part of the rotor shaft, which is close to the compressor system, is fixedly connected with a crank joint;

the engine system and the compressor system both comprise a cylinder barrel and two piston bodies;

a front end cover is arranged at one end of a cylinder barrel of the compressor system, a rear end cover is arranged at one end of the cylinder barrel of the engine system, the front end cover and the rear end cover are respectively detachably connected with the cylinder barrel through thread pairs, the cylinder barrel is of a cylindrical structure and is sleeved on the rotor shaft, an air inlet and an air outlet are formed in the cylinder barrel, and a cavity of the cylindrical structure is a cam inner molded surface cavity; the rotor shaft is provided with a rectangular groove which is used for mounting a piston body of an engine system and a piston body of a compressor system respectively, and the phase difference between the piston body of the compressor system and the piston body of the engine system is 40-50 degrees; one end of the piston body, which is far away from the bottom of the rectangular groove, is abutted against the inner profile cavity of the cam under the action of a compression spring at the bottom of the piston body and centrifugal force; a spark plug is arranged on a cylinder barrel of the engine system;

the engine assembly further comprises a lubricating oil waterway system and a cooling waterway system which are respectively used for lubricating and cooling the relatively-transported parts of the engine assembly.

The further scheme is that tooth-shaped radiators are arranged on the outer sides of a cylinder barrel of the compressor system and a cylinder barrel of the engine system, and the tooth-shaped radiators are in interference fit with the cylinder barrel of the compressor system/the cylinder barrel of the engine system.

A middle partition plate is fixedly arranged between the two tooth-shaped radiators, and the middle partition plate is in clearance fit with the rotor shaft;

the cam valve actuating mechanism comprises a cam shaft and a plunger seat;

the top of the middle partition board is provided with a groove, and the plunger seat is fixed in the groove through a fastening screw; the top of the plunger seat is provided with a blind hole, a spring is arranged in the blind hole, the spring is fixedly connected with the plunger seat through a spring seat, when a cam fixed on the left side of a camshaft is in a stop position (namely a cam base circle), the spring is in a compression state and presses the plunger downwards, so that a communication gas circuit between a compressor and an engine is in a closed state, the plunger is fixedly arranged in the spring, and the bottom of the plunger penetrates through the spring seat and is fixedly connected with the inner wall of the spring;

the top of the plunger is of a convex annular structure, a cam and a rolling cylinder are arranged in the convex annular structure, the rolling cylinder and the inner cylindrical surface of the plunger are in small clearance fit and can rotate freely, the rolling cylinder is positioned at the top of the cam and forms a cam pair, the cam is in interference fit connection with the end part of the cam shaft and is fastened by a screw, the rolling cylinder is communicated with the plunger to jack up together in the rotating process along with the cam shaft, a transverse through hole is formed in the middle partition plate, one end of the through hole is matched with the position of an air outlet of the cylinder of the compressor system, the other end of the through hole is matched with the position of an air inlet of the cylinder of the engine system, and after the plunger is jacked up, the air outlet of the cylinder of the compressor system is communicated with the air inlet of the cylinder of the engine system through the through hole; the two sides of the convex annular structure are provided with baffle plates which are fixedly connected with the convex annular structure through fastening screws and used for positioning the rolling cylinder in the convex annular structure, and meanwhile, the side surfaces of the baffle plates and the two sides of the convex annular structure form a moving pair to guide the upper and lower movement of the plunger;

the other end of the camshaft is connected with a small synchronous belt pulley through a flat key, the outer side of the synchronous belt pulley is fixed through a locking nut, a shaft sleeve is arranged on the camshaft, a shaft sleeve pressing plate is arranged on the outer side of the shaft sleeve, a base is arranged at the bottom of the shaft sleeve pressing plate, and the base is fixedly connected with the shaft sleeve pressing plate through a fastening screw;

the bottom of the base is positioned with a tooth-shaped radiator of the compressor system through a positioning pin and then connected through a fastening screw.

The lubricating oil path system comprises a lubricating oil tank, a lubricating oil pump and a lubricating oil path;

the bottom of the engine assembly is fixedly provided with a support, and the lubricating oil tank and the lubricating oil pump are communicated through an oil pipe and are respectively and fixedly arranged on the support;

the lubricating oil path comprises a main lubricating oil path and a sub lubricating oil path;

the rotor shaft is provided with a hollow oil path along the axis, two ends of the hollow oil path are blocked, the front end cover is provided with an oil inlet, the oil inlet extends to the hollow oil path, the rear end cover is provided with an oil outlet, and the oil inlet and the oil outlet are respectively communicated with the hollow oil path;

the rotor comprises a rotor shaft, a front end cover, a rear end cover, a shaft sleeve, a sliding bearing, a pressing block and a pressing block, wherein shaft sleeves are sleeved at two ends of the rotor shaft, excircles of the two shaft sleeves are in interference fit with inner holes of the front end cover and the rear end cover respectively, a shaft sleeve sealing ring is embedded between the shaft sleeve and the front end cover/the rear end cover, the outer side of the shaft sleeve is sleeved with the sliding bearing, the sliding bearing and the front end cover/the rear end cover form a revolute pair, the outer side of the shaft sleeve is also provided with a shaft double-lip type sealing ring, the outer side of the double-lip type sealing ring is provided with the pressing block, and an inner hole of the pressing block is in interference fit with the excircle of the double-lip type sealing ring;

the oil outlet/oil inlet penetrates through the front end cover/rear end cover, the sliding bearing and the shaft sleeve;

end face sealing rings are respectively arranged at two ends of the rotor shaft and between the rotor shaft and the middle partition plate, and the end face sealing rings at two ends of the rotor shaft respectively form sealing faces with the front end cover/the rear end cover; the end face sealing ring between the rotor shaft and the middle partition plate form a sealing surface;

the middle partition plate is provided with a T-shaped oil hole, the center of the rotor shaft is provided with an oil distribution pipe, and the T-shaped oil hole is communicated with the oil distribution pipe at a certain moment;

the main lubricating oil path is used for lubricating the double-lip sealing ring, the sliding bearing and the shaft sleeve sealing ring and sealing the end face sealing ring between the rotor shaft and the middle partition plate at a certain moment when the rotor shaft rotates;

a sealing connecting block is arranged on one side, close to the piston body, of the end face sealing ring and is clamped with the end face sealing ring, and the sealing connecting block and the piston body form a sealing surface and provide a guiding effect for radial movement of the piston body; a horizontal oil passing pipe is arranged on the piston body, and branch oil pipes uniformly extend outwards from the oil passing pipe;

the sealing joint block is provided with a right-angle oil pipe, and the right-angle oil pipe is communicated with the oil inlet through an oil pipe arranged in the front end cover;

at a certain moment when the piston body moves radially, the oil passing pipe is communicated with the right-angle oil pipe;

the sub-lubricating oil path is used for lubricating a sealing surface formed by the sealing connecting block and the piston body and a sealing surface formed by the piston body and the inner profile surface of the cylinder barrel cam;

the oil inlet is communicated with the lubricating oil pump through a hose.

The piston body is a plate-type piston and comprises a middle plate and a rear panel;

the side surfaces of the middle plate and the rear panel are respectively provided with a positioning hole and a threaded hole which correspond to each other in position, a positioning pin is arranged in the positioning hole, a fastening screw is arranged in the threaded hole, and the positioning pin and the fastening screw sequentially penetrate through the middle plate and the rear panel;

the outer sides of the middle plates are provided with semi-surrounding structure sealing rings which are clamped with the middle plates to form sealing surfaces with the cylinder barrel;

the oil passing pipe and the branch oil pipe are both positioned on the rear panel.

The further proposal is that a cooling water channel is arranged at the position of the tooth-shaped radiator close to the outer circle of the cylinder barrel, a water channel cover plate is arranged on the end surface of the water channel, and the inner and outer profile side surfaces of the water channel cover plate are fixedly connected with the tooth-shaped radiator through welding;

the cooling water path system comprises a cooling water tank, a cooling water pump and a cooling water path;

the cooling water tank and the cooling water pump are communicated through a water pipe and are respectively and fixedly arranged on the bracket;

the tooth-shaped radiator is provided with a water inlet and a water outlet, the water inlet and the water outlet respectively extend to the outside of the tooth-shaped radiator, the water inlet is communicated with the cooling water pump, and the water outlet pipe is communicated with the cooling water tank, so that the cooling water can be recycled;

the back of the tooth-shaped radiator is alternately provided with a plurality of channels and cooling cavities, and cooling water flows through the cooling cavities and the channels in sequence along an S shape.

The bottom of the rectangular groove is provided with a mounting hole, an elastic element is arranged between the rectangular groove and the piston body, one end of the elastic element is fixed in the mounting hole, and the other end of the elastic element is fixedly connected with the piston body;

the cylinder barrel is sleeved on the surface of the rotor shaft and is rotatably connected with the rotor shaft;

one end of the piston body, which is far away from the elastic element, is abutted against the inner cam cavity;

3-5 oil storage grooves which are parallel along the axial direction are formed in the middle of the side face of the rectangular groove and are used for lubricating a sliding pair friction surface formed by the piston body and the rotor shaft.

The further scheme is that annular grooves are formed in two ends of the rotor shaft and the end face, close to the intermediate partition plate, of the rotor shaft, 3-6 blind holes are formed in the annular grooves along the axial direction, compression springs are installed in the blind holes, end face sealing rings are arranged in the annular grooves, the end face sealing rings are in clearance fit connection with the annular grooves, and the compression springs are abutted to one side face, close to the annular grooves, of the end face sealing rings; and one side of the end face sealing ring, which is far away from the annular groove, is abutted against the front end cover/rear end cover to form a sealing face.

The further scheme is that the inner wall of the cam cavity is a closed curved surface formed by a base circle part, a push stroke part and a return stroke part in a surrounding mode, the base circle part is a positive circle curve, the push stroke part and the return stroke part are symmetrically arranged cam curves, and the positive circle curve is smoothly connected with the cam curves.

And the top of the oil storage pot is provided with a pot cover for adding lubricating oil.

Compared with the prior art, the invention has the beneficial effects that:

in the process that the rotor shaft rotates 360 degrees, the engine rotates a circle to do work twice, namely the engine does the shaft work twice in 1/2 stroke, the same rotor shaft of the engine can be connected with the compression cavity and the combustion chamber in series, and the work efficiency is high. The compression ratio can be changed by improving the piston body and designing the profile cam curve and the cam base circle in the cylinder barrel, and the compression ratio can reach more than 12.

A piston body in the engine adopts a lubricating oil structure which is opened and closed at fixed points and automatically; and static parts such as a rotor shaft, an end cover and the like adopt a fixed-point lubricating oil structure, so that the lubricating efficiency of lubricating oil is improved, the energy consumption is reduced, and the abrasion is greatly reduced.

The engine adopts two combined modes of forced circulation water cooling and natural heat dissipation, and compared with an air-cooled engine, the cooling effect is greatly improved, and the engine is ensured to work in the most suitable temperature state.

Drawings

The invention is illustrated and described only by way of example and not by way of limitation in the scope of the invention as set forth in the following drawings, in which:

FIG. 1: the assembly diagram of the circular motion rotor engine;

FIG. 2: schematic diagram of engine lubrication main oil circuit;

FIG. 3a: the open state of the lubricating oil path of the compressor is shown schematically;

FIG. 3b: schematic diagram of closed state of lubricating oil path of compressor;

FIG. 3c: the compressor system and the engine system piston body are structurally and schematically illustrated;

FIG. 3d: a compressor piston and engine piston phase relationship diagram;

FIG. 3e: the engine compressor cylinder and the engine cylinder barrel cavity curve;

FIG. 4 is a schematic view of: schematic diagram of working cycle principle of engine

FIG. 5: a schematic sealing structure diagram of a rotor shaft compressor part;

FIG. 6a: a partial cutaway view of a compressor system/engine system cooling water circuit;

FIG. 6b: compressor system/engine system cooling water circuit exploded view;

FIG. 7: a cam cavity curve schematic diagram;

FIG. 8: the compressor air compression start moment schematic diagram;

FIG. 9: the compressor air compression end time schematic diagram;

FIG. 10: an engine ignition time schematic diagram;

FIG. 11: on the basis of FIG. 10, the engine is rotated 120 degrees counterclockwise to obtain a schematic diagram of the exhaust time of the engine;

FIG. 12: the structural schematic diagram of the cam valve actuating mechanism;

FIG. 13: a compressor calculation schematic;

in the figure: 1. an engine system; 2. a compressor system; 3. a cam valve train; 4. a rotor shaft; 5. an external acting component; 6. a synchronous pulley; 7. a synchronous belt; 8. a crank joint; 9. a cylinder barrel; 10. a piston body; 11. a front end cap; 12. a rear end cap; 13. a rectangular groove; 14. a toothed heat sink; 15. a lubricating oil tank; 16. a lubricating oil pump; 17. a support; 18. a hollow oil passage; 19. an oil inlet 20 and an oil outlet; 21. a shaft sleeve; 22. a shaft sleeve sealing ring; 23. a sliding bearing; 24. a double-lip type seal ring; 25. a middle partition plate; 26. an end face seal ring; 27. a T-shaped oil hole; 28. an oil distributing pipe; 29. sealing the connecting block; 30. passing through an oil pipe; 31. a branch oil pipe; 32. a right-angle oil pipe; 33. a hose; 34. a middle plate; 35. a rear panel; 36. positioning holes; 37. a threaded hole; 38. positioning and pinning; 39. fastening screws; 40. a sealing plate; 41. a waterway cover plate; 42. a cooling water tank; 43. a cooling water pump; 44. a water inlet; 45. a water outlet; 46. a channel; 47. a cooling chamber; 48. an elastic element; 49. an oil storage tank; 50. an annular groove; 51. a compression spring; 52. a base circle portion; 53. a push-stroke part; 54. a backhaul portion; 55. a spark plug; 56. an exhaust pipe; 57. a fuel pipe; 58. a carburetor; 59. a plunger seat; 60. a spring; 61. a spring seat; 62. a plunger; 63. a cam; 64. a baffle plate; 65. rolling the cylinder; 66. a shaft sleeve pressing plate; 67. a shaft sleeve; 68. a camshaft; 69. a retainer ring; 70. a flat bond; 71. locking the nut; 72. positioning pins; 73. a base; 74. a small timing pulley.

Detailed Description

In order to make the objects, technical solutions, design methods, and advantages of the present invention more apparent, the present invention will be further described in detail by specific embodiments with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

The invention provides a piston circular motion rotor engine, which consists of two sets of main engine systems and one set of auxiliary engine system, namely a rotor compressor system, a rotor engine system and a gas distribution, oil supply, ignition and other matching systems. The rotor compressor system is composed of a cylinder barrel, a piston, a central rotor and a sealing assembly, and has the functions of realizing air compression and providing high-temperature and high-pressure air for an engine; the rotor engine system consists of a cylinder barrel, a piston, a central rotor and a sealing assembly, and has the function of realizing explosive combustion of mixed oil gas in an engine combustion chamber and applying work to the outside; the air distribution, oil supply and actuating mechanism consists of a valve, a cam and an air distribution actuating mechanism and has the functions of matching with the engine to realize oil injection, ignition and combustion. Other supporting systems include: starting and generating, lubricating, cooling, electronic control systems and the like, and the function is to ensure the normal operation of the rotor engine system. As shown in fig. 1, the hybrid vehicle engine specifically includes an engine assembly composed of parts such as an engine system 1, a compressor system 2, and a cam valve actuating mechanism 3, where the cam valve actuating mechanism 3 is fixed between the engine system 1 and the compressor system 2 and is used to control opening and closing of an intake passage between the engine system 1 and the compressor system 2; the engine system 1 and the compressor system 2 are connected through a rotor shaft 4;

the rotor shaft 4 penetrates through the engine system 1 and the compressor system 2, one side of the rotor shaft 4, which is close to the engine system 1, is connected with an external acting component 5 through a speed increaser, and in the embodiment, the external acting component 5 is a propeller; the other side of the rotor shaft 4 is sleeved with a synchronous belt wheel 6, the synchronous belt wheel 6 is connected with a cam shaft of the cam valve actuating mechanism 3 through a synchronous belt 7, and a crank joint 8 is fixedly connected to the end part, close to the compressor system 2, of the rotor shaft 4;

the engine system 1 and the compressor system 2 both comprise a cylinder 9 and two piston bodies 10; a fuel oil port is formed in a cylinder barrel 9 of the compressor system 2, a carburetor 58 is connected to the fuel oil port, an outlet of the carburetor 58 is communicated with the fuel oil port, an oil inlet of the carburetor 58 is connected with a fuel oil pipe 57, and the fuel oil pipe 57 is connected with an external oil tank; a spark plug 55 is arranged on the cylinder 9 of the engine system 1; a front end cover 11 is arranged at one end of a cylinder barrel 9 of the compressor system 2, a rear end cover 12 is arranged at one end of the cylinder barrel 9 of the engine system 1, the front end cover 11 and the rear end cover 12 are respectively detachably connected with the cylinder barrel through thread pairs, the cylinder barrel is of a cylindrical structure, and a cavity of the cylindrical structure is a cam inner molded surface cavity; the cylinder barrel is sleeved on the rotor shaft 4, the cylinder barrel 9 is provided with an air inlet and an air outlet, wherein the air outlet on the cylinder barrel 9 of the engine system 1 is an exhaust pipe 56 of the engine, the rotor shaft 4 is provided with a rectangular groove 13 which is respectively used for installing a piston body 10 of the engine system 1 and a piston body 10 of the compressor system 2, the bottom of the rectangular groove 13 is provided with an installation hole, an elastic element 48 is arranged between the rectangular groove 13 and the piston body 10, one end of the elastic element 48 is fixed in the installation hole, and the other end of the elastic element 48 is fixedly connected with the piston body 10; the cylinder barrel 9 is sleeved on the surface of the rotor shaft 4 and is rotationally connected with the rotor shaft 4; one end of the piston body 10 far away from the elastic element 48 is abutted with the cam cavity; 3-5 oil storage grooves 49 which are parallel along the axial direction are formed in the middle of the side surface of the rectangular groove 13 and are used for lubricating a sliding pair friction surface formed by the piston body 10 and the rotor shaft 4. The piston body 10 of the compressor system 2 is 45 out of phase with the piston body 10 of the engine system 1; one end of the piston body 10, which is far away from the bottom of the rectangular groove 13, is abutted with the inner profile cavity of the cam;

the engine assembly further comprises a lubricating oil waterway system and a cooling waterway system which are respectively used for lubricating and cooling the relatively-transported parts of the engine assembly. The lubricating oil path system comprises a lubricating oil tank 15, a lubricating oil pump 16 and a lubricating oil path; the bottom of the engine assembly is fixedly provided with a bracket 17, and the lubricating oil tank 15 and the lubricating oil pump 16 are communicated through an oil pipe 30 and are respectively and fixedly arranged on the bracket 17.

As shown in fig. 12, in the cam valve train, a plunger seat 59 is fastened to a middle partition 25 by a fastening screw 39, the plunger seat 59 has a blind hole in the middle, a lower portion of a plunger 62 and the blind hole of the plunger seat 59 constitute a moving pair, a compression spring 60 is installed between a support base of the plunger and a spring base 61, and the fastening screw 39 passes through left and right through holes of the plunger seat 2 to fix the spring base 61 to the plunger seat 59. The left and right surfaces of the middle partition plate 25 are provided with a strip-shaped through hole which is used as an airflow channel between the compressor and the engine. The fastening screw 39 passes through the through hole of the baffle plate 64 and positions the rolling cylinder 65 on the plunger 62, so that the rolling cylinder 65 can freely roll in the semicircular inner cylindrical surface in the upper portion of the plunger 62.

The cam 63 is fixedly connected to the left end of a cam shaft 68 provided with a shaft sleeve 67 by using a fastening screw 39, a shaft sleeve pressure plate 66 is fixedly connected to a base 73 by using the fastening screw 39, and the base 73 is connected with a tooth-shaped radiator 14 of the compressor by using the fastening screw 39 and a positioning pin 22. The collar 69 prevents the sleeve 67 from sliding to the right, and the timing pulley 6 is connected to the camshaft 68 using a flat key 70, and the rightmost side is fixed with a lock nut 71. The small synchronous pulley 74 and the synchronous pulley 6 are connected to the rotor shaft 4 for transmission by using a synchronous belt; the cam 63 jacks up the rolling cylinder 65 together with the plunger 62 in the process of rotating along with the cam shaft 68, a transverse through hole is formed in the middle partition plate 25, one end of the through hole is matched with the position of an air outlet of the cylinder 9 of the compressor system 2, the other end of the through hole is matched with the position of an air inlet of the cylinder 9 of the engine system 1, and after the plunger 62 is jacked up, the air outlet of the cylinder 9 of the compressor system 2 is communicated with the air inlet of the cylinder 9 of the engine system 1 through the through hole;

the toothed radiators 14 are arranged on the outer sides of the cylinder 9 of the compressor system 2 and the cylinder 9 of the engine system 1, and the toothed radiators 14 are in interference fit with the cylinder 9 of the compressor system 2/the cylinder 9 of the engine system 1. Before starting, the fuel pipe 57 is connected with the atomizing oil inlet of the carburetor 58, and the other end is connected with the fuel oil tank. When the engine is started, the electric tool is inserted into the crank joint 8, the electric tool is started to rotate anticlockwise and drives the compressor rotor shaft and the engine rotor shaft to rotate, the compressor system 2 and the engine system 1 share the same rotor shaft 4, the phase difference between the compressor piston body and the engine piston body is 45 degrees, the compressor system 2 starts to compress fuel oil and air passing through the carburetor 58 to form a high-pressure mixture of the oil and the air, and the compression ratio is larger than 12, so that favorable conditions are created for entering the combustion chamber of the engine. Compression ratio

In this embodiment, V _a = compressionThe volume of a compression cavity of the compressor plus the volume of an air passage of the compressor; v _c And = engine combustion chamber volume + engine air passage volume. As shown in fig. 13a and 13b, i.e. V _a ＝b+a+c,V _c = d + e, in this application the compression ratio is greater than 12

At a certain moment when the air compression of the compressor system 2 is finished, the synchronous belt 7 drives the cam air distribution mechanism 3, the transmission ratio of the rotor shaft 4 to the cam air distribution mechanism 3 is 1; in the process, the piston body 10 and the cylinder 9 form a cam pair, and the cam pair extends and retracts in a rectangular groove arranged on the rotor shaft 4 in a reciprocating mode along the radial direction to drive the rotor shaft 4 to rotate. During the process of the rotor shaft rotating 360 ° (see fig. 4, 5 and 6), the piston body a and the piston body C are taken as an example for one cycle process (the piston body a and the piston body C are repeated during one rotation process of the compressor piston body B and the engine piston body D). Because the double pistons are distributed at 180 degrees, the piston body C and the piston body D do work for 1 time after one rotation, namely the engine does work for two times after one rotation, namely the engine has 1/2 stroke.

As shown in fig. 2, the lubrication oil passage includes a main lubrication oil passage and a sub-lubrication oil passage;

the rotor shaft 4 is provided with a hollow oil path 18 along an axis, two ends of the hollow oil path 18 are blocked, the front end cover 11 is provided with an oil inlet 19, the oil inlet 19 extends to the hollow oil path 18, the rear end cover 12 is provided with an oil outlet 20, and the oil inlet 19 and the oil outlet 20 are respectively communicated with the hollow oil path 18; the rotor comprises a rotor shaft 4, a front end cover 11, a rear end cover 12, a shaft sleeve 21, a shaft sleeve sealing ring 22, a sliding bearing 23 and a pressing block, wherein the two ends of the rotor shaft 4 are sleeved with the shaft sleeves 21, the excircles of the two shaft sleeves 21 are in interference fit with the inner holes of the front end cover 11 and the rear end cover 12 respectively, the shaft sleeve sealing ring 22 is embedded between the shaft sleeve 21 and the front end cover 11/rear end cover 12, the outer side of the shaft sleeve 21 is sleeved with the sliding bearing 23, the sliding bearing 23 and the front end cover 11/rear end cover 12 form a revolute pair, the outer side of the shaft sleeve 21 is further provided with a double-lip type sealing ring 24 for a shaft, the outer side of the double-lip type sealing ring 24 is provided with the pressing block, and the inner hole of the pressing block is in interference fit with the excircle of the double-lip type sealing ring 24;

the oil outlet 20/the oil inlet 19 penetrates through the front end cover 11/the rear end cover 12, the sliding bearing 23 and the shaft sleeve 21; a middle partition plate 25 is fixedly arranged between the two tooth-shaped radiators 14, and the middle partition plate 25 is in clearance fit with the rotor shaft 4;

end face sealing rings 26 are respectively arranged at two ends of the rotor shaft 4 and between the rotor shaft 4 and the middle partition plate 25, and the end face sealing rings 26 at two ends of the rotor shaft 4 respectively form sealing faces with the front end cover 11/the rear end cover 12; the end face seal ring 26 between the rotor shaft 4 and the intermediate partition 25 forms a seal face with the intermediate partition 25; annular grooves 50 are formed in the two ends of the rotor shaft 4 and the end face, close to the intermediate partition plate 25, of the rotor shaft 4, the annular grooves 50 are provided with 3-6 blind holes along the axial direction, compression springs 51 are installed in the blind holes, end face sealing rings 26 are arranged in the annular grooves 50, the end face sealing rings 26 are in clearance fit connection with the annular grooves 50, and the compression springs 51 are abutted to one side face, close to the annular grooves 50, of the end face sealing rings 26; the side of the end face seal ring 26 remote from the annular groove 50 abuts against the front end cap 11/rear end cap 12 to form a seal face.

The middle partition plate 25 is provided with a T-shaped oil hole 27, the center of the rotor shaft 4 is provided with an oil distribution pipe 28, and the T-shaped oil hole 27 is communicated with the oil distribution pipe 28 at a certain moment;

the main lubricating oil path is used for lubricating a double-lip type sealing ring 24, a sliding bearing 23 and a shaft sleeve sealing ring 22, and sealing an end face sealing ring 26 between the rotor shaft 4 and a middle partition plate 25 at a certain moment when the rotor shaft 4 rotates;

as shown in fig. 3a, a sealing joint 29 is arranged on one side of the end face sealing ring 26 close to the piston body 10, the sealing joint 29 is clamped with the end face sealing ring 26, and the sealing joint 29 forms a sealing surface with the piston body 10 and provides a guiding function for the radial movement of the piston body 10; a horizontal oil passing pipe 30 is formed on the piston body 10, and branch oil pipes 31 uniformly extend outwards from the oil passing pipe 30; the sealing joint block 29 is provided with a right-angle oil pipe 32, and the right-angle oil pipe 32 is communicated with the oil inlet 19 through an oil pipe arranged in the front end cover 11; at a certain moment when the piston body 10 moves radially, the oil through pipe 30 is communicated with the right-angle oil pipe 32;

the sub-lubricating oil path is used for lubricating a sealing surface formed by the sealing connecting block 29 and the piston body 10 and a sealing surface formed by the piston body 10 and the inner cam profile of the cylinder barrel 9;

the oil inlet 19 communicates with the lubricating oil pump 16 through a hose 33.

When the rotor shaft 4 rotates after the engine is started, the lubricating oil pump 16 (fig. 1) also starts to work, the lubricating oil reaches the sealing joint block 29 through the oil inlet 19 and reaches the sealing ring 40 through the oil passing pipe 30 and the branch oil pipe 31, and the lubricating oil path can be in one of the following two states during the rotation of the rotor shaft: go on or off. When the piston body 10 rotates along with the rotor shaft 4, the rectangular groove makes reciprocating radial motion back and forth, meanwhile, a moving pair is formed by the matching surfaces of the sealing ring 40 and the sealing connection block 29, when the piston body 10 starts to extend, the lubricating oil path is a through path (figure 3 a) and reaches the surface of the sealing ring 40 and the friction pair of the cylinder barrel along the oil path of the oil pipe 30 and the branch oil pipe 31, after the lubricating oil path extends for a certain distance, the lubricating oil path is closed, the opening and closing of lubrication are automatically realized (figure 3 b), and the quantitative and fixed-point supply of lubricating oil to a required part is realized.

As shown in fig. 3c and 5, the piston body 10 is a plate-type piston including an intermediate plate 34 and a rear plate 35;

the side surfaces of the middle plate 34 and the rear plate 35 are respectively provided with a positioning hole 36 and a threaded hole 37, the positions of which correspond to each other, a positioning pin 38 is arranged in the positioning hole 36, a fastening screw 39 is arranged in the threaded hole 37, and the positioning pin 38 and the fastening screw 39 sequentially penetrate through the middle plate 34 and the rear plate 35; the outer sides of the middle plates 34 are respectively provided with a sealing ring 40 of a semi-surrounding structure, and the sealing rings are clamped with the middle plates 34 to form sealing surfaces with the cylinder barrel; the oil passing pipe 30 and the branch oil pipe 31 are both located on the rear panel 35.

As shown in fig. 4a, the compressor cavity is as shown in fig. 4a2, the inner profile of the compressor cylinder, the outer surface of the rotor shaft, the side surfaces of the piston bodies of the two piston bodies a and B, the end surface of the end cover (not shown) and the end surface of the intermediate partition plate (not shown) jointly form the compression cavity of the compressor, when the rotor shaft 4 drives the piston bodies a and B counterclockwise to rotate to the position shown in fig. 4a2, the air inlet (i.e., the atmosphere side) of the compressor is communicated with the compressor cavity, the compression cavity and the combustion chamber of the engine are not connected with each other under the control of the cam valve actuating mechanism, and no mixed gas exists in the combustion chamber, such as the engine cavity shown in fig. 4a 1; the rotor shaft 4 continues to rotate counterclockwise, the oil-air mixture passing through the carburetor 58 is sucked into a compressor compression cavity, when the rotor shaft drives the compressor piston body a to rotate to the position shown in fig. 4B2, the compressor is at the end of air compression, at the moment, the cam air distribution mechanism 3 is opened instantly, the mixed gas firstly enters an air inlet transition strip-shaped cavity of the engine (see fig. 4B 1), and meanwhile, the compressor piston B starts to enter an air suction state shown in fig. 4B 2; the rotor shaft 4 continues to rotate by a certain angle, all mixed gas enters a combustion chamber of the engine, the combustion chamber of the engine is formed by an inner molded surface of a cylinder barrel of the engine, the left side surface and an end cover end surface (not shown) of a piston body C of the engine, an end surface (not shown) of a middle partition plate and the outer surface of the rotor shaft, as shown in fig. 4C1, at the moment, a spark plug is immediately ignited, and explosive gas drives the piston C of the engine to do work outwards; meanwhile, the piston body B of the compressor starts to enter a gas compression state, the cam gas distribution mechanism 3 is not opened, the compression cavity and the combustion chamber are not connected with each other, and no mixed gas exists in the combustion chamber; the rotor shaft continues to rotate, the piston body C of the engine rotates to the position shown in figure 4D1, the engine does work and finishes exhaust, and the piston bodies C and D of the engine respectively do work outwards once, namely the rotor shaft rotates for one circle and does shaft work twice. At this point, the compressor piston bodies a, B, C, D start to cycle again into the next cycle period.

As shown in fig. 6a and 6b, a cooling water path is opened at a position of the tooth-shaped heat sink 14 near the outer circle of the cylinder, a water path cover plate 41 is arranged on the end face of the cooling water path, and the inner and outer profile side faces of the water path cover plate 41 are fixedly connected with the tooth-shaped heat sink 14 by welding.

In the above, the cooling water path system includes the cooling water tank 42, the cooling water pump 43, and the cooling water path; the cooling water tank 42 and the cooling water pump 43 are communicated through a water pipe and are respectively and fixedly arranged on the bracket 17; a water inlet 44 and a water outlet 45 are formed in the tooth-shaped radiator (14), the water inlet 44 and the water outlet 45 respectively extend to the outside of the tooth-shaped radiator (14), the water inlet 44 is communicated with the cooling water pump 43, and the water outlet pipe is communicated with the cooling water tank 42, so that the cooling water can be recycled; the back of the tooth-shaped radiator (14) is alternately provided with a plurality of channels 46 and cooling cavities 47, and cooling water flows through the cooling cavities 47 and the channels 46 in sequence along the S shape.

As shown in fig. 3e and fig. 7, the inner wall of the cam cavity is a closed curved surface surrounded by a base circle part 52, a push stroke part 53 and a return stroke part 54, the base circle part 52 is a perfect circle curve, the push stroke part 53 and the return stroke part 54 are symmetrically arranged cam curves, and the perfect circle curve is smoothly connected with the cam curves. The cam curve with uniform acceleration and uniform deceleration motion laws is adopted, so that the pressure angle change rate is reduced, the cam motion is changed by rigid impact and flexibly impacted, the operation is more stable and reliable, the maintenance is reduced, and the service life is longer. The central angle of the base circle portion 52 is 120 °, and the push stroke portion 53 and the return stroke portion 54 are symmetrically arranged and smoothly connected with the base circle portion 52. As shown in fig. 8, in the present embodiment, taking the base circle portion 52 as an example with a radius of 40mm, the curve of the push stroke portion 53 is divided into eight parts at 15 ° to form (1) to (9) nine line segments (distances from the center of the circle to the curve), and the length of the line segment (1) is: 40mm, the length of the line segment (2) is: 40.5mm, the length of the line segment (3) is: 41.8mm, the length of the line segment (4) is: 44mm, the length of the line segment (5) is: 46.4mm, the length of the line segment (6) is: 48.9mm, the length of the line segment (7) is: 50.9mm, the length of the line segment (8) is: 52.3mm, the length of the line segment (9) is: 52.8mm.

In this embodiment, the piston body of the engine adopts a lubricating oil structure which can be opened and closed at fixed points and automatically; and static parts such as a rotor shaft, an end cover and the like adopt a fixed-point lubricating oil structure, so that the lubricating efficiency of lubricating oil is improved, the energy consumption is reduced, and the abrasion is greatly reduced. The engine adopts two combined modes of forced circulation water cooling and natural heat dissipation, and compared with an air-cooled engine, the cooling effect is greatly improved, and the engine is ensured to work in the most suitable temperature state. The compressor cavity and the engine cavity are made of super wear-resistant aluminum alloy ceramics embedded with nodular cast iron, the end covers are made of aluminum alloy ceramics, and the rotor shaft is made of titanium alloy, so that the whole weight of the engine is reduced, and the wear resistance is improved.

In practice, the engine works as follows:

the inner profile of the compressor cylinder barrel, the outer surface of the rotor shaft, the side surfaces of the piston bodies of the two piston bodies A and B, the end surfaces of the end covers (not shown) and the end surfaces of the middle partition plates (not shown) jointly form a compression cavity of the compressor, when the rotor shaft drives the piston bodies A and B to rotate anticlockwise to the position shown in figure 8B, the air inlet (namely the atmosphere side) of the compressor is communicated with the compressor cavity, the compression cavity of the engine and a combustion chamber are not connected with each other under the control of a cam valve actuating mechanism, and no mixed gas exists in the combustion chamber, such as the engine cavity shown in figure 8 a; the rotor shaft continues to rotate anticlockwise, an oil-air mixture passing through the carburetor is sucked into a compressor compression cavity, when the rotor shaft drives the compressor piston body A to rotate to the position shown in figure 9B, the compressor is at the end of air compression, the air distribution mechanism is instantly opened at the moment, the mixed gas firstly enters an air inlet transition strip-shaped cavity of the engine (see figure 9 a), and meanwhile, the compressor piston B starts to enter an air suction state shown in figure 9B; the rotor shaft continues to rotate by a certain angle, all mixed gas enters a combustion chamber of the engine, the combustion chamber of the engine is formed by an inner molded surface of a cylinder barrel of the engine, the left side surface of a piston body C of the engine, an end surface (not shown) of an end cover, an end surface (not shown) of a middle partition plate and the outer surface of the rotor shaft, as shown in figure 10a, a spark plug is immediately ignited at the moment, and explosive gas drives a piston C of the engine to do work outwards; meanwhile, the piston body B of the compressor starts to enter a gas compression state, a gas distribution system is not opened, the compression cavity and the combustion chamber are not connected with each other, and no mixed gas exists in the combustion chamber; the rotor shaft continues to rotate, the piston body C of the engine rotates to the position shown in figure 11a, the engine does work and finishes exhaust, and the piston bodies C and D of the engine respectively do work outwards once, namely the rotor shaft rotates for one circle and does shaft work twice. Subsequently, the compressor piston bodies a, B and the engine piston bodies C, D start to cycle again into the next cycle period, and the above process is repeated.

Having described embodiments of the present invention, the foregoing description is intended to be exemplary, not exhaustive, and not limited to the embodiments disclosed. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments. The terminology used herein was chosen in order to best explain the principles of the embodiments, the practical application, or technical improvements to the market, or to enable others of ordinary skill in the art to understand the embodiments disclosed herein.

Claims

1. A piston circular motion rotary engine comprises an engine assembly composed of parts and components such as an engine system (1), a compressor system (2), a cam valve actuating mechanism (3) and the like, wherein the cam valve actuating mechanism (3) is installed between the engine system (1) and the compressor system (2) and used for controlling the opening and closing of an air inlet channel between the engine system (1) and the compressor system (2); characterized in that the engine system (1) and the compressor system (2) are connected by a rotor shaft (4);

the rotor shaft (4) penetrates through the engine system (1) and the compressor system (2), one side, close to the engine system (1), of the rotor shaft (4) is connected with an external acting component (5) through a speed increaser, the other side of the rotor shaft (4) is sleeved with a synchronous belt wheel (6), the synchronous belt wheel (6) is connected with a cam shaft of the cam valve actuating mechanism (3) through a synchronous belt (7), and the end, close to the compressor system (2), of the rotor shaft (4) is fixedly connected with a crank joint (8);

the engine system (1) and the compressor system (2) both comprise a cylinder barrel (9) and two piston bodies (10);

a front end cover (11) is arranged at one end of a cylinder barrel (9) of the compressor system (2), a rear end cover (12) is arranged at one end of the cylinder barrel (9) of the engine system (1), the front end cover (11) and the rear end cover (12) are respectively detachably connected with the cylinder barrel (9), the cylinder barrel (9) is of a cylinder structure and is sleeved on the rotor shaft (4), an air inlet and an air outlet are formed in the cylinder barrel (9), and a cavity of the cylinder structure is a cam inner molded surface cavity; the rotor shaft (4) is provided with a rectangular groove (13) which is respectively used for installing a piston body (10) of the engine system (1) and a piston body (10) of the compressor system (2), and the phase difference between the piston body (10) of the compressor system (2) and the piston body (10) of the engine system (1) is 40-50 degrees; one end, far away from the bottom of the rectangular groove (13), of the piston body (10) is abutted against the inner profile cavity of the cam under the action of a compression spring (48) at the bottom of the piston body (10) and centrifugal force, and a spark plug (55) is arranged on a cylinder barrel (9) of the engine system (1);

2. A piston circular motion rotor engine according to claim 1, characterized in that the toothed radiators (14) are arranged on the outside of the cylinder (9) of the compressor system (2) and the cylinder (9) of the engine system (1), and the toothed radiators (14) are in interference fit with the cylinder (9) of the compressor system (2)/the cylinder (9) of the engine system (1).

3. A piston circular motion rotary engine according to claim 2, characterized in that an intermediate partition (25) is fixedly arranged between the two tooth-shaped radiators (14), and the intermediate partition (25) is in clearance fit with the rotor shaft (4);

the cam valve actuating mechanism (3) comprises a cam shaft (68) and a plunger seat (59);

the top of the middle partition plate (25) is provided with a groove, and the plunger seat (59) is fixed in the groove through a fastening screw 39; the top of the plunger seat (59) is provided with a blind hole, a spring (60) is arranged in the blind hole, the spring (60) is fixedly connected with the plunger seat (59) through a spring seat (61), when a cam (53) fixed on the left side of a cam shaft (68) is in a stop position (namely a cam base circle), the spring (60) is in a compression state and presses a plunger (62) downwards, a communication gas circuit between a compressor and an engine is in a closed state, the plunger (62) is fixedly arranged in the spring (60), and the bottom of the plunger (62) penetrates through the spring seat (61) and is fixedly connected with the inner wall of the spring (60);

the top of the plunger (62) is of a convex annular structure, a cam (63) and a rolling cylinder (65) are arranged in the convex annular structure, the rolling cylinder (65) and the inner cylindrical surface of the plunger (62) are in small clearance fit and can freely rotate, the rolling cylinder (65) is positioned at the top of the cam (63) and forms a cam pair, the cam (63) is in interference fit connection with the end part of the cam shaft (68) and is fastened by a screw (39), the cam (63) enables the rolling cylinder (65) to be communicated with the plunger (62) to jack up together in the rotating process along with the cam shaft (68), a transverse through hole is formed in the middle partition plate (25), one end of the through hole is matched with the position of an air outlet of a cylinder (9) of the compressor system (2), the other end of the through hole is matched with the position of an air inlet of the cylinder (9) of the engine system (1), and after the plunger (62) is jacked up, the air outlet of the cylinder (9) of the compressor system (2) is communicated with the cylinder (9) of the engine system (1) through the through hole; baffle plates (64) are arranged on two sides of the convex annular structure, the baffle plates (64) are fixedly connected with the convex annular structure through fastening screws (39) and used for positioning the rolling cylinder (65) in the convex annular structure, and meanwhile, the side surfaces of the baffle plates (64) and the two sides of the convex annular structure form moving pairs to play a role in guiding the up-and-down movement of the plunger (62); the other end of the cam shaft (68) is connected with a small synchronous pulley (74) through a flat key (70), the outer side of the synchronous pulley (6) is fixed through a locking nut (71), a shaft sleeve (67) is arranged on the cam shaft (68), a shaft sleeve pressing plate (66) is arranged on the outer side of the shaft sleeve (67), a base (73) is arranged at the bottom of the shaft sleeve pressing plate (66), and the base (73) is fixedly connected with the shaft sleeve pressing plate (66) through a fastening screw (39);

the bottom of the base (73) is positioned with a tooth-shaped radiator (14) of the compressor system (2) through a positioning pin (72) and then connected through a fastening screw (39).

4. A piston circular motion rotary engine according to claim 3, characterized in that the lubricating oil path system comprises a lubricating oil tank (15), a lubricating oil pump (16) and a lubricating oil path;

a support (17) is fixedly arranged at the bottom of the engine assembly, and the lubricating oil tank (15) and the lubricating oil pump (16) are communicated through an oil pipe (30) and are respectively and fixedly arranged on the support (17);

the rotor shaft (4) is provided with a hollow oil way (18) along the axis, two ends of the hollow oil way (18) are blocked, the front end cover (11) is provided with an oil inlet (19), the oil inlet (19) extends to the hollow oil way (18), the rear end cover (12) is provided with an oil outlet (20), and the oil inlet (19) and the oil outlet (20) are respectively communicated with the hollow oil way (18);

the rotor comprises a rotor shaft (4), and is characterized in that shaft sleeves (21) are sleeved at two ends of the rotor shaft (4), excircles of the two shaft sleeves (21) are in interference fit with inner holes of a front end cover (11) and a rear end cover (12) respectively, a shaft sleeve sealing ring (22) is embedded between the shaft sleeve (21) and the front end cover (11)/the rear end cover (12), a sliding bearing (23) is sleeved on the outer side of the shaft sleeve (21), the sliding bearing (23) and the front end cover (11)/the rear end cover (12) form a revolute pair, a shaft double-lip sealing ring (24) is further arranged on the outer side of the shaft sleeve (21), a pressing block is arranged on the outer side of the double-lip sealing ring (24), and inner holes of the pressing block are in interference fit with the outer circle (24) of the double-lip sealing ring;

the oil outlet (20)/the oil inlet (19) penetrates through the front end cover (11)/the rear end cover (12), the sliding bearing (23) and the shaft sleeve (21);

end face sealing rings (26) are respectively arranged at two ends of the rotor shaft (4) and between the rotor shaft (4) and the middle partition plate (25), and the end face sealing rings (26) at the two ends of the rotor shaft (4) respectively form sealing faces with the front end cover (11)/the rear end cover (12); an end face sealing ring (26) between the rotor shaft (4) and the middle partition plate (25) forms a sealing surface with the middle partition plate (25);

the middle partition plate (25) is provided with a T-shaped oil hole (27), the center of the rotor shaft (4) is provided with an oil distribution pipe (28), and the T-shaped oil hole (27) is communicated with the oil distribution pipe (28) at a certain moment;

the main lubricating oil path is used for lubricating the double-lip sealing ring (24), the sliding bearing (23) and the shaft sleeve sealing ring (22), and sealing an end face sealing ring (26) between the rotor shaft (4) and the middle partition plate (25) at a certain moment when the rotor shaft (4) rotates;

one side, close to the piston body (10), of the end face sealing ring (26) is provided with a sealing connecting block (29), the sealing connecting block (29) is clamped with the end face sealing ring (26), and the sealing connecting block (29) and the piston body (10) form a sealing surface and provide a guide effect for the radial movement of the piston body (10); a horizontal oil passing pipe (30) is arranged on the piston body (10), and branch oil pipes (31) uniformly extend outwards from the oil passing pipe (30);

the sealing joint block (29) is provided with a right-angle oil pipe (32), and the right-angle oil pipe (32) is communicated with the oil inlet (19) through an oil pipe arranged in the front end cover (11);

at a certain moment when the piston body (10) moves radially, the oil passing pipe (30) is communicated with the right-angle oil pipe (32);

the sub-lubricating oil path is used for lubricating a sealing surface formed by the sealing connecting block (29) and the piston body (10) and a sealing surface formed by the piston body (10) and the inner cam profile of the cylinder barrel (9);

the oil inlet (19) is communicated with the lubricating oil pump (16) through a hose (33).

5. A piston circular motion rotary engine according to claim 4, characterized in that the piston body (10) is a plate piston comprising an intermediate plate (34) and a rear plate (35);

the side surfaces of the middle plate (34) and the rear panel (35) are respectively provided with a positioning hole (36) and a threaded hole (37) which correspond to each other in position, a positioning pin (38) is arranged in the positioning hole (36), a fastening screw (39) is arranged in the threaded hole (37), and the positioning pin (38) and the fastening screw (39) sequentially penetrate through the middle plate (34) and the rear panel (35);

the outer sides of the middle plates (34) are respectively provided with a sealing ring (40) of a semi-surrounding structure, and the sealing rings are clamped with the middle plates (34) to form sealing surfaces with the cylinder barrel (9);

the oil passing pipe (30) and the branch oil pipe (31) are both positioned on the rear panel (35).

6. The piston circular motion rotor engine as claimed in claim 5, characterized in that a cooling water path is opened at the position of the tooth-shaped radiator (14) close to the cylinder outer circle, a water path cover plate (41) is arranged on the end face of the cooling water path, and the inner and outer profile side faces of the water path cover plate (41) are fixedly connected with the tooth-shaped radiator (14) by welding.

7. A piston circular motion rotary engine according to claim 6, characterized in that the cooling water path system comprises a cooling water tank (42), a cooling water pump (43) and a cooling water path;

the cooling water tank (42) and the cooling water pump (43) are communicated through a water pipe and are respectively arranged on the bracket (17);

a water inlet (44) and a water outlet (45) are formed in the tooth-shaped radiator (14), the water inlet (44) is communicated with the cooling water pump (43), and the water outlet pipe is communicated with the cooling water tank (42), so that the cooling water can be recycled;

the back of the tooth-shaped radiator (14) is alternately provided with a plurality of channels (46) and cooling cavities (47), and cooling water flows through the cooling cavities (47) and the channels (46) along the S shape in sequence.

8. A piston circular motion rotor engine according to claim 4, characterized in that, the bottom of the rectangular groove (13) is provided with a mounting hole, an elastic element (48) is arranged between the rectangular groove (13) and the piston body (10), one end of the elastic element (48) is fixed in the mounting hole, and the other end is fixedly connected with the piston body (10);

one end of the piston body (10) far away from the elastic element (48) is abutted with the cam inner cavity;

3-5 oil storage grooves (49) which are parallel along the axial direction are formed in the middle of the side face of the rectangular groove (13) and are used for lubricating a moving pair friction surface formed by the piston body (10) and the rotor shaft (4).

9. The piston circular motion rotary engine according to claim 8, characterized in that both ends of the rotor shaft (4) and the end face of the rotor shaft (4) close to the intermediate partition (25) are provided with annular grooves (50), the annular grooves (50) are provided with 3-6 blind holes along the axial direction, compression springs (51) are installed in the blind holes, end face seal rings (26) are arranged in the annular grooves (50), the end face seal rings (26) are in clearance fit connection with the annular grooves (50), and the compression springs (51) are abutted against one side face of the end face seal rings (26) close to the annular grooves (50); and one side of the end face sealing ring (26) far away from the annular groove (50) is abutted with the front end cover (11)/the rear end cover (12) to form a sealing surface.

10. A piston circular motion rotary engine according to claim 1, characterized in that the cam cavity inner wall is a closed curved surface enclosed by a base circle part (52), a push stroke part (53) and a return stroke part (54), the base circle part (52) is a right circular curve, the push stroke part (53) and the return stroke part (54) are symmetrically arranged cam curves, the right circular curve and the cam curves are smoothly connected, and the distance increase rate of the push stroke part (53) and the return stroke part (54) from the center of the base circle part (52) is 120% -150%.