A new type of twin-rotor engine body structure

Abstract

A new type of twin rotor engine body structure belongs to the technical field of engine. The shell system is axially connected in series by front side shell, front and rear rotor shell, middle shell and rear shell assembly, the shell is provided with through positioning sleeve and sealing rubber ring, the internal integrated cooling system water channel and lubricating system oil channel; the eccentric shaft penetrates the shell, the double rotors are arranged in staggered phase, the front end counterweight block and the flywheel disc with integrated counterweight are matched to realize vibration reduction. The oil pump is fixed to the lower end of the shell and the oil pan is covered outside, the chain wheel and chain drive global lubrication; the water pump is directly driven by the counterweight bolt key groove, double end face installation, with large and small cooling circulation. The front and rear rotor shells are universal, sharing double oil injection end oil rails, the middle shell can be externally connected with an oil-gas separator; the whole machine is flexibly connected with the engine compartment through shock absorbing pads. The positioning and sealing effect is good, the vibration and noise is low, the lubrication and heat dissipation is stable, the universality of parts is strong, the high power output and long-term operation reliability are considered, and the production and operation cost is reduced.

Description

Technical Field

[0001] This invention belongs to the field of engine technology, specifically a novel dual-rotor engine body structure. Background Technology

[0002] Currently, reciprocating internal combustion engines have numerous components and complex assembly structures. During operation, the reciprocating impact of the piston causes significant vibration, resulting in lower power density for the same volume and a larger installation space requirement. Traditional single-rotor engines abandon the reciprocating motion mechanism, relying on lightweight housings, composite material seals, and independent thermal management solutions to reduce overall size and increase maximum operating speed. However, due to the limitations of the single-chamber, single-side power-operating structure, the rotational inertial forces generated by the rotor cannot be canceled out, leading to poor overall operational stability, insufficient power output smoothness, and poor NVH performance. Furthermore, the output power limit of a single power chamber is relatively low, making it difficult to meet the demanding requirements of high-power extended-range engines and heavy-load continuous operation. Dual-rotor engines can overcome the inherent performance bottlenecks of single-rotor engines, adapting to higher output power and more complex and demanding power usage conditions. Summary of the Invention

[0003] To address the problems existing in the background art, the present invention provides a novel dual-rotor engine body structure.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: a novel dual-rotor engine body structure, comprising a housing system, a rotor and eccentric shaft system, a lubrication system, a chain drive system, and a cooling system;

[0005] The housing system is arranged in an axial series, including a front side housing, a front rotor housing, an intermediate housing, a rear rotor housing, and a rear housing assembly;

[0006] The rear end face of the front side shell is fitted and connected to the front end face of the front rotor shell; the rear end face of the front rotor shell is fitted and connected to the front end face of the middle shell; the rear end face of the middle shell is fitted and connected to the front end face of the rear rotor shell; and the rear end face of the rear rotor shell is fitted and connected to the front end face of the rear shell assembly. The shell system contains an integrally formed cooling system water passage and a lubrication system oil passage. An oil-gas separator installation channel is provided on the upper part of the middle shell, and an integrally formed oil-gas separation channel is also present inside the middle shell. The oil-gas separator installation channel and the oil-gas separation channel are interconnected. The lubrication system includes... The system includes an oil pan, an oil pump, and an oil filter. The oil pump is fixedly installed at the mounting position at the lower end of the front side housing and the front rotor housing. The oil pan completely covers the outside of the oil pump and is fixedly connected to the lower end of the front side housing, the front rotor housing, the intermediate housing, the rear rotor housing, and the rear housing assembly. The oil filter is assembled on the outside of the water pump and the front cover assembly of the cooling system. The output oil circuit of the oil pump is sequentially connected to the oil filter and the oil cooler before entering the main oil passage of the eccentric shaft of the rotor and eccentric shaft system. The rotor and eccentric shaft system includes an eccentric shaft, thrust washers and limit seats, counterweights, counterweight bolts, and a front rotor... The eccentric shaft comprises a sub-assembly and seals, a rear rotor assembly and seals, a flywheel disc and flywheel disc bolts; the eccentric shaft axially penetrates the front rotor housing, the intermediate housing, and the rear rotor housing; the front rotor assembly and seals are coaxially fitted onto the front section of the eccentric shaft, and are housed within the space formed by the mating of the front side housing and the front rotor housing; the rear rotor assembly and seals are coaxially fitted onto the rear section of the eccentric shaft, and are housed within the space formed by the mating of the rear rotor housing and the rear housing assembly; the front rotor assembly and seals and the rear rotor assembly and seals are circumferentially offset along the eccentric shaft. The front end is sequentially fitted with a thrust plate and limit seat, a counterweight, and the drive sprocket of the chain drive system, which are locked and fixed by the counterweight bolts. The rear end of the eccentric shaft is coaxially fixed to the flywheel disc by the flywheel disc bolts. The chain drive system includes a drive sprocket and an oil pump chain. The oil pump chain meshes with the drive sprocket and the oil pump input shaft respectively. The upper part of the front shell, the lower part of the rear shell assembly, and the front end of the oil pan are all integrally cast with shock-absorbing pad mounting holes. The shock-absorbing pads are arranged on both sides of each shock-absorbing pad mounting hole. The front shell, the rear shell assembly, and the oil pan are respectively assembled and connected to the engine compartment frame through the corresponding shock-absorbing pads.

[0007] The front rotor housing has through holes at its upper and lower positions and is fitted with through-type positioning sleeves. The two ends of the positioning sleeves are respectively limited and fitted with the front side shell and the middle shell. The rear rotor housing has through holes at its upper and lower positions and is fitted with through-type positioning sleeves. The two ends of the positioning sleeves are respectively limited and fitted with the middle shell and the rear shell assembly. Each shell is fitted with a tension bolt and a lock nut at the docking position to complete the axial locking and fixing.

[0008] Both the front rotor housing and the rear rotor housing have air inlets on the upper left side and exhaust ports on the lower left side. A fuel rail assembly is fixed to both the front rotor housing and the rear rotor housing. The fuel rail assembly has two fuel injection ends, which extend into the corresponding air inlets of the front rotor housing and the rear rotor housing, respectively. Both the front rotor housing and the rear rotor housing have a sensor mounting hole and multiple spark plug mounting holes on the right side. A knock sensor is installed in each sensor mounting hole, and a spark plug is installed in each spark plug mounting hole. Each air inlet and each exhaust port has an integrally formed bolted flange on its outer edge.

[0009] The cooling system includes a water pump and front cover assembly, a water pump casing, an oil cooler, a thermostat and cover assembly, an inlet pipe and O-ring assembly, and a small circulation pipe and O-ring assembly;

[0010] The water pump and front cover assembly are simultaneously fixedly mounted on the front end of the front side housing and the front end of the oil pan mounting surface. The counterweight bolt has a keyway, and the water pump pin of the water pump and front cover assembly is embedded in the keyway of the counterweight bolt. The oil cooler is mounted on the mounting end face of the front end of the water pump and front cover assembly. The water pump volute has a water passage end face that is sealed and connected to the water pump and front cover assembly. The water pump volute has a pre-installed pipe that connects to the external radiator. The two ends of the inlet pipe and O-ring assembly are respectively connected to the water pump and front cover assembly and the intermediate housing. The two ends of the small circulation pipe and O-ring assembly are respectively connected to the intermediate housing and the water pump and front cover assembly. The thermostat and cover assembly are sealed and connected to the cooling system water passage. The thermostat and cover assembly have a matching pipe that connects to the external radiator.

[0011] The water pump volute, the water pump and front cover assembly's internal water passage, the inlet pipe and O-ring assembly, the housing system's internal water passage, the thermostat and cover assembly are sequentially sealed and connected to form a large coolant circulation loop; the housing system's internal water passage, the thermostat and cover assembly, the small circulation pipe and O-ring assembly, the water pump and front cover assembly's internal water passage, and the water pump volute are sequentially sealed and connected to form a small coolant circulation loop.

[0012] The eccentric shaft has a through main oil passage at its center and a radial oil outlet at the crank position of the eccentric shaft, which is connected to the main oil passage.

[0013] An oil-gas separator installation interface is reserved on the upper part of the intermediate shell. The oil-gas separator can be detachably assembled at the installation interface, and the oil-gas separator is sealed and connected to the oil-gas separation channel pipeline inside the intermediate shell.

[0014] The front rotor housing and the rear rotor housing have the same external outline, rotor profile, intake and exhaust passages, and cooling system water passages.

[0015] The flywheel disk integrates a balance weight structure.

[0016] The front shell, middle shell, front rotor shell, rear rotor shell, and rear shell assembly are all integrated water-cooled cast shell structures. Sealing rings are installed between the mating surfaces of adjacent shells to achieve mutual sealing and communication of the internal water channels. Only the water inlet pipe and O-ring assembly and the small circulation pipe and O-ring assembly are installed on the outside of the shell.

[0017] Compared with the prior art, the beneficial effects of the present invention are:

[0018] 1. The present invention adopts a rotor assembly with front and rear rotor housings arranged circumferentially offset along the eccentric axis, and with the double counterweight structure of counterweight block and flywheel disk, the rotational inertial force generated by rotor operation can be mutually offset, effectively reducing the vibration of the whole machine and improving the stability of operation; each housing is positioned by upper and lower through-type positioning sleeves and sealing rubber rings are added to the mating surface, resulting in higher assembly positioning accuracy, better water channel sealing effect, and strong axial assembly consistency of housing.

[0019] 2. The shell adopts an axially integrated water-cooled casting structure. The internal cooling system water channels of each shell are interconnected, and it is equipped with two independent coolant circulation loops of large and small. Under low temperature conditions, the small loop can quickly raise the temperature, while under normal conditions, the large loop can efficiently dissipate heat. The heat dissipation is uniform and the temperature control adaptability is strong.

[0020] 3. The water pump pin of the cooling system is directly driven by the keyway of the counterweight bolt. It drives the water pump synchronously by relying on the rotation of the eccentric shaft. No additional independent drive components are required, which simplifies the transmission structure of the whole machine, reduces the number of parts, and reduces the probability of failure. The water pump is also mounted on the front side shell and the oil pan on both mounting ends, ensuring stable installation support.

[0021] 4. The front and rear rotor housings have identical structural dimensions, allowing for universal mold production and reducing mold manufacturing costs; the entire machine is equipped with only one set of oil rail assembly, with two sets of fuel injection ends supplying fuel to the front and rear power chambers respectively, reducing fuel supply components, and enabling independent power output in both chambers, resulting in a higher upper limit for power output.

[0022] 5. The upper part of the front shell, the lower part of the rear shell, and the front end of the oil pan of the whole machine are all integrally cast with shock-absorbing pad mounting holes. The shock-absorbing pads are arranged on both sides of the holes and are flexibly connected to the engine compartment frame through the shock-absorbing pads, further blocking the transmission of vibration to the engine compartment and reducing the operating noise of the whole machine.

[0023] 6. The eccentric shaft is equipped with a through-type main oil passage, which, together with the radial oil outlet of the crankshaft, achieves forced lubrication of the rotor, bearings, and seals, ensuring stable lubrication supply and extending the service life of each moving part; the oil pump is fixed at the lower end of the housing, and the oil pan is fully enclosed for protection, providing better protection for the lubricated parts; the intermediate housing is equipped with an independent oil-gas separation channel, which can separate the oil and gas that escapes from the crankcase and prevent oil sludge from accumulating.

[0024] In summary, this invention, through its housing through-hole positioning and sealing ring structure, staggered dual-rotor vibration reduction structure, integrated water-cooled dual-circulation cooling, simplified synchronous water pump dual-end face installation transmission, single oil rail dual-injection oil supply structure, external oil pump protection at the lower end of the housing, full-area forced lubrication, and multi-position flexible vibration damping installation, has practical and beneficial effects in improving the housing assembly sealing and positioning accuracy, reducing overall machine vibration, optimizing heat dissipation and temperature control, simplifying transmission and oil supply structure, extending the service life of components, and controlling production and maintenance costs. At the same time, the dual independent working chamber structure can improve the overall power output performance of the machine. Attached Figure Description

[0025] Figure 1 This is a front view of the present invention;

[0026] Figure 2 This is the right view of the present invention;

[0027] Figure 3 This is the left view of the present invention;

[0028] Figure 4 This is a rear view of the present invention;

[0029] Figure 5 This is a schematic diagram of the internal structure of the present invention. Detailed Implementation

[0030] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0031] This embodiment describes a novel dual-rotor engine body structure, including a housing system, a rotor and eccentric shaft system, a lubrication system, a chain drive system, and a cooling system;

[0032] The housing system is arranged in an axial series and includes a front side housing 6, a front rotor housing 12, an intermediate housing 7, a rear rotor housing 11, and a rear housing assembly 8.

[0033] The rear end face of the front side shell 6 is fitted and connected to the front end face of the front rotor shell 12; the rear end face of the front rotor shell 12 is fitted and connected to the front end face of the intermediate shell 7; the rear end face of the intermediate shell 7 is fitted and connected to the front end face of the rear rotor shell 11; and the rear end face of the rear rotor shell 11 is fitted and connected to the front end face of the rear shell assembly 8. The shell system contains an integrally formed cooling system water passage and a lubrication system oil passage. An oil-gas separator installation channel is provided on the upper part of the intermediate shell 7, and an integrally formed oil-gas separation channel is formed inside the intermediate shell 7. The oil-gas separator installation channel and the oil-gas separation channel are interconnected. The lubrication system includes an oil pan 13, an oil pump 28, and an oil filter 4. The oil pump 28 is fixedly installed at the mounting position at the lower end of the front side housing 6 and the front rotor housing 12. The oil pan 13 completely covers the outside of the oil pump 28 and is fixedly connected to the lower end of the front side housing 6, the front rotor housing 12, the intermediate housing 7, the rear rotor housing 11, and the rear housing assembly 8. The oil filter 4 is assembled on the outside of the water pump and the front cover assembly 14 of the cooling system. The output oil passage of the oil pump 28 is sequentially connected to the oil filter 4, the oil cooler 1, and then connected to the main oil passage of the eccentric shaft 27 of the rotor and eccentric shaft system. The eccentric shaft system includes an eccentric shaft 27, a thrust washer and a limiting seat 31, a counterweight 24, a counterweight bolt 23, a front rotor assembly and seal 25, a rear rotor assembly and seal 26, a flywheel disc 21 and flywheel disc bolt 20. The eccentric shaft 27 axially penetrates the front rotor housing 12, the intermediate housing 7, and the rear rotor housing 11. The front rotor assembly and seal 25 are coaxially fitted onto the front section of the eccentric shaft 27, and are housed within the space formed by the mating of the front side housing 6 and the front rotor housing 12. The rear rotor assembly and seal 26 are coaxially fitted onto the rear section of the eccentric shaft 27. The front rotor assembly and seal 25 are housed within the space formed by the rear rotor housing 11 and the rear housing assembly 8. The front rotor assembly and seal 25 are staggered from the rear rotor assembly and seal 26 along the eccentric shaft. The front end of the eccentric shaft 27 is sequentially fitted with a thrust plate and a limit seat 31, a counterweight 24, and the drive sprocket 30 of the chain drive system, and is locked and fixed by the counterweight bolt 23. The rear end of the eccentric shaft 27 is coaxially fixed to the flywheel disc 21 by the flywheel disc bolt 20. The chain drive system includes the drive sprocket 30 and the oil pump chain 29. The oil pump chain 29 meshes with the drive sprocket 30 and the input shaft of the oil pump 28, respectively.

[0034] The upper part of the front shell 6, the lower part of the rear shell assembly 8, and the front end of the oil pan 13 are all integrally cast with shock-absorbing pad mounting holes. The shock-absorbing pads are arranged on both sides of each shock-absorbing pad mounting hole. The front shell 6, the rear shell assembly 8, and the oil pan 13 are respectively assembled and connected to the engine compartment frame through the corresponding shock-absorbing pads.

[0035] The front rotor housing 12 has through holes at its upper and lower positions and is fitted with through-type positioning sleeves. The two ends of the positioning sleeves are respectively limited and fitted with the front side housing 6 and the middle housing 7. At the same time, the auxiliary housing mating surface achieves circumferential auxiliary sealing, improving the reliability of the water circuit sealing. The rear rotor housing 11 has through holes at its upper and lower positions and is fitted with through-type positioning sleeves. The two ends of the positioning sleeves are respectively limited and fitted with the middle housing 7 and the rear housing assembly 8. Each housing mating position is equipped with tension bolts 5 and lock nuts 22 to complete axial locking and fixation.

[0036] Both the front rotor housing 12 and the rear rotor housing 11 have air inlets 16 on their upper left sides and exhaust ports 19 on their lower left sides. Both the front rotor housing 12 and the rear rotor housing 11 are fixed with an oil rail assembly 15. The oil rail assembly 15 has two injection ends, which extend into the corresponding air inlets 16 of the front rotor housing 12 and the rear rotor housing 11, respectively. Both the front rotor housing 12 and the rear rotor housing 11 have a sensor mounting hole and multiple spark plug mounting holes on their right sides. Each sensor mounting hole is fitted with a knock sensor 9, and each spark plug mounting hole is fitted with a spark plug 10. Each air inlet 16 and each exhaust port has an integrally formed bolted flange on its outer edge.

[0037] The cooling system includes a water pump and front cover assembly 14, a water pump volute 3, an oil cooler 1, a thermostat and cover assembly 2, an inlet pipe and O-ring assembly 18, and a small circulation pipe and O-ring assembly 17.

[0038] The water pump and front cover assembly 14 are simultaneously fixedly mounted on the front end of the front side shell 6 and the front end mounting surface of the oil pan 13. The counterweight bolt 23 has a keyway, and the water pump pin of the water pump and front cover assembly 14 is embedded in the keyway of the counterweight bolt 23. The oil cooler 1 is mounted on the mounting end face of the front end of the water pump and front cover assembly 14. The water pump volute 3 has a water passage end face that is sealed and connected to the water pump and front cover assembly 14. The water pump volute 3 has a pre-installed pipe that connects to the external radiator. The two ends of the water inlet pipe and O-ring assembly 18 are respectively connected to the water pump and front cover assembly 14 and the intermediate shell 7. The two ends of the small circulation pipe and O-ring assembly 17 are respectively connected to the intermediate shell 7 and the water pump and front cover assembly 14. The thermostat and cover assembly 2 are sealed and connected to the cooling system water passage. The thermostat and cover assembly 2 has a matching pipe that connects to the external radiator.

[0039] The water pump volute 3, the water pump and front cover assembly 14 internal water passage, the water inlet pipe and O-ring assembly 18, the water passage of the housing system internal water passage, the thermostat and cover assembly 2 are sequentially sealed and connected to form a large coolant circulation loop; the water passage of the housing system internal water passage, the thermostat and cover assembly 2, the small circulation pipe and O-ring assembly 17, the water pump and front cover assembly 14 internal water passage, and the water pump volute 3 are sequentially sealed and connected to form a small coolant circulation loop.

[0040] The eccentric shaft 27 has a through main oil passage at its center, and a radial oil outlet is provided at the crank position of the eccentric shaft 27. The radial oil outlet is connected to the main oil passage.

[0041] An oil-gas separator installation interface is reserved on the upper part of the intermediate housing 7. The oil-gas separator can be detachably assembled at the installation interface, and the oil-gas separator is sealed and connected to the oil-gas separation channel pipeline inside the intermediate housing 7.

[0042] The front rotor housing 12 and the rear rotor housing 11 have the same external outline, rotor profile, intake and exhaust passages, and cooling system water passages.

[0043] The flywheel disk 21 integrates a balance weight structure.

[0044] The front shell 6, the middle shell 7, the front rotor shell 12, the rear rotor shell 11, and the rear shell assembly 8 are all integrated water-cooled cast shell structures. Sealing rings are installed between the mating surfaces of adjacent shells to achieve mutual sealing and communication of the internal water channels. Only the water inlet pipe and O-ring assembly 18 and the small circulation pipe and O-ring assembly 17 are installed on the outside of the shell.

[0045] During operation, the rotor drives the eccentric shaft 27 to rotate. The torque is transmitted to the flywheel disk 21 via the rear end of the eccentric shaft 27 and output outward. The flywheel disk 21 is coaxially fixed to the rear end of the eccentric shaft 27 by the flywheel disk bolts 20. The flywheel disk 21 integrates a balance counterweight structure. The front end of the eccentric shaft 27 is sequentially equipped with a thrust washer and limit seat 31, a counterweight block 24, and a drive sprocket 30, and is locked by the counterweight block bolts 23. The counterweight block 24 cooperates with the counterweight on the flywheel disk 21 to counteract the rotational imbalance. The eccentric shaft 27 axially penetrates the front rotor housing 12, the intermediate housing 7, and the rear rotor housing 11. The front rotor assembly and seal 25 and the rear rotor assembly and seal, which are 180° out of phase, are coaxially mounted. 26. The front rotor assembly and seals 25 are housed in the front independent working chamber formed by the front side shell 6 and the front rotor housing 12. The rear rotor assembly and seals 26 are housed in the rear independent working chamber formed by the rear rotor housing 11 and the rear housing assembly 8. The two rotors are arranged with their phases staggered by 180°, which cancels out the rotational inertial forces and significantly reduces the vibration of the entire engine. From the front of the engine, the front rotor housing 12 and the rear rotor housing 11 are both provided with air intakes 16 on the upper left side and exhaust ports 19 on the lower left side. The front rotor housing 12 and the rear rotor housing 11 are both fixed with a fuel rail assembly 15. The fuel rail assembly 15 is provided with two fuel injection ends, which extend into the corresponding air intakes 16. Fuel is injected into the rotor housing, where it mixes with the intake airflow to form an air-fuel mixture. This mixture enters its respective power chamber for combustion, and the exhaust gases are discharged from the exhaust port 19 on the lower left of each housing. Both the front rotor housing 12 and the rear rotor housing 11 have a sensor mounting hole and multiple spark plug mounting holes on their right sides (the number of spark plug mounting holes depends on the required number of spark plugs 10). A knock sensor 9 is installed in the sensor mounting hole, and spark plugs 10 are installed in the spark plug mounting holes. The spark plugs 10 ignite and drive the rotor to rotate, outputting power. The housing system consists of a front side housing 6, a front rotor housing 12, a middle housing 7, a rear rotor housing 11, and a rear housing assembly 8, which are axially connected and fitted together. The housing 12 and the rear rotor housing 11 are respectively provided with through holes and fitted with through-type positioning sleeves. The two ends of the positioning sleeves are respectively limited and fitted with the adjacent housings. A sealing ring is installed between the mating surfaces of the adjacent housings to achieve water circuit sealing. Each housing is axially locked as a whole by the tension bolts 5 and the locking nuts 22. The front rotor housing 12 and the rear rotor housing 11 are completely consistent in shape, profile, air intake and exhaust passages, and cooling system water passages. The cooling system water passage and lubrication system oil passage are integrally formed inside the housing. The oil-gas separator installation channel on the upper part of the middle housing 7 is connected to the internal oil-gas separation channel. When working, the oil and gas that escape from the cavity enter the external oil-gas separator through the channel to achieve oil-gas separation and balance the pressure inside the housing.The cooling system relies on the keyway of the counterweight bolt 23 at the front end of the eccentric shaft 27 to drive the water pump and the water pump pin inside the front cover assembly 14. The water pump and front cover assembly 14 are simultaneously mounted on the front end of the front side housing 6 and the front end of the oil pan 13. The oil cooler 1 is mounted on the front end of the water pump and front cover assembly 14, and the oil filter 4 is mounted on the outside. The water pump volute 3 is sealed and connected to the internal water passage of the water pump and front cover assembly 14. The water pump volute 3, thermostat and cover assembly 2 are all matched. Connect the pipe to the external radiator; the coolant has two circulation loops: the large circulation loop passes sequentially through the inlet pipe and O-ring assembly 18, water pump volute 3, water pump and front cover assembly 14 internal water channels, cooling system water passages, thermostat and cover assembly 2 before connecting to the external radiator for heat dissipation; the small circulation loop passes sequentially through the cooling system water passages, thermostat and cover assembly 2, small circulation pipe and O-ring assembly 17, water pump volute 3. At low temperatures, the thermostat closes the external passage, allowing the coolant to circulate. The system uses a small circulation loop for rapid heating. The lubrication system relies on the drive sprocket 30 on the eccentric shaft 27 to drive the oil pump chain 29, which in turn drives the oil pump 28. The oil pump 28 is fixedly installed at the mounting position at the lower end of the front side housing 6 and the front rotor housing 12. The oil pan 13 completely covers the outside of the oil pump 28 and is fixed to the lower end of the entire housing. After the oil pump 28 draws oil, it flows sequentially through the oil passage of the front side housing 6, the oil filter 4, and the oil cooler 1 before being sent to the through-type main oil passage of the eccentric shaft 27. Forced lubrication is achieved by continuously supplying oil to the rotor, seals, and bearing friction pairs through the radial oil outlet at the crank position. The upper part of the front housing 6, the lower part of the rear housing assembly 8, and the front end of the oil pan 13 are all integrally cast with damping pad mounting holes. Damper pads are arranged on both sides of each mounting hole. The entire machine is connected to the nacelle frame via these damping pads. Relying on the integrated housing structure, dual-rotor phase-shifting balance structure, and integrated water-oil-gas channels, the machine achieves lightweight construction, high power density, and stable operation with low vibration.

[0046] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of the equivalent features of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A novel dual-rotor engine body structure, characterized in that: It includes the housing system, rotor and eccentric shaft system, lubrication system, chain drive system, and cooling system; The housing system is arranged in an axial series, including a front side shell (6), a front rotor shell (12), a middle shell (7), a rear rotor shell (11), and a rear shell assembly (8); the rear end face of the front side shell (6) is fitted and connected to the front end face of the front rotor shell (12), the rear end face of the front rotor shell (12) is fitted and connected to the front end face of the middle shell (7), the rear end face of the middle shell (7) is fitted and connected to the front end face of the rear rotor shell (11), and the rear end face of the rear rotor shell (11) is fitted and connected to the front end face of the rear shell assembly (8). The housing system has an integrally formed cooling system water channel and a lubrication system oil channel. An oil-gas separator installation channel is opened on the upper part of the middle shell (7). An oil-gas separation channel is integrally formed inside the middle shell (7). The oil-gas separator installation channel and the oil-gas separation channel are interconnected. The lubrication system includes an oil pan (13), an oil pump (28), and an oil filter (4); the oil pump (28) is fixedly installed at the mounting position at the lower end of the front side shell (6) and the front rotor shell (12); the oil pan (13) completely covers the outside of the oil pump (28); the oil pan (13) is fixedly connected to the lower end of the front side shell (6), the front rotor shell (12), the middle shell (7), the rear rotor shell (11), and the rear shell assembly (8); the oil filter (4) is assembled on the outside of the water pump and the front cover assembly (14) of the cooling system; the output oil circuit of the oil pump (28) is connected to the oil filter (4), the oil cooler (1), and then connected to the main oil passage of the eccentric shaft (27) of the rotor and eccentric shaft system. The rotor and eccentric shaft system includes an eccentric shaft (27), a thrust plate and a limiting seat (31), a counterweight (24), a counterweight bolt (23), a front rotor assembly and a seal (25), a rear rotor assembly and a seal (26), a flywheel disc (21), and a flywheel disc bolt (20). The eccentric shaft (27) axially penetrates the front rotor housing (12), the intermediate housing (7), and the rear rotor housing (11). The front rotor assembly and the seal (25) are coaxially fitted on the front section of the eccentric shaft (27). The front rotor assembly and the seal (25) are housed within the space formed by the mating of the front side shell (6) and the front rotor housing (12). The rear rotor assembly and seal (26) are coaxially mounted on the rear section of the eccentric shaft (27). The rear rotor assembly and seal (26) are housed in the space formed by the rear rotor housing (11) and the rear housing assembly (8). The front rotor assembly and seal (25) and the rear rotor assembly and seal (26) are staggered along the circumference of the eccentric shaft. The front end of the eccentric shaft (27) is sequentially fitted with a thrust plate and a limit seat (31), a counterweight (24) and the drive sprocket (30) of the chain drive system, and is locked and fixed by the counterweight bolt (23). The rear end of the eccentric shaft (27) is coaxially fixed with the flywheel disc (21) by the flywheel disc bolt (20). The chain drive system includes a drive sprocket (30) and an oil pump chain (29); the oil pump chain (29) meshes with the input shaft of the drive sprocket (30) and the oil pump (28); the upper part of the front shell (6), the lower part of the rear shell assembly (8), and the front end of the oil pan (13) are all integrally cast with damping pad mounting holes, and the damping pads are arranged on both sides of each damping pad mounting hole. The front shell (6), the rear shell assembly (8), and the oil pan (13) are respectively assembled and connected to the engine compartment frame through the corresponding damping pads.

2. The novel dual-rotor engine body structure according to claim 1, characterized in that: The front rotor housing (12) has through holes at its upper and lower positions and is fitted with through-type positioning sleeves. The two ends of the positioning sleeves are respectively limited and fitted to the front side housing (6) and the middle housing (7). The rear rotor housing (11) has through holes at its upper and lower positions and is fitted with through-type positioning sleeves. The two ends of the positioning sleeves are respectively limited and fitted to the middle housing (7) and the rear housing assembly (8). Each housing is fitted with a tension bolt (5) and a lock nut (22) to complete the axial locking and fixing.

3. The novel dual-rotor engine body structure according to claim 1, characterized in that: The front rotor housing (12) and the rear rotor housing (11) are provided with air inlets (16) on the upper left side and exhaust ports (19) on the lower left side. The front rotor housing (12) and the rear rotor housing (11) are jointly fixed with oil rail assemblies (15). The oil rail assembly (15) is provided with two oil injection ends, which extend into the air inlets (16) of the front rotor housing (12) and the rear rotor housing (11) respectively. The front rotor housing (12) and the rear rotor housing (11) are provided with a sensor mounting hole and multiple spark plug mounting holes on the right side. Each sensor mounting hole is equipped with a knock sensor (9) and each spark plug mounting hole is equipped with a spark plug (10). Each air inlet (16) and each exhaust port (19) are integrally formed with bolted flanges on their outer edges.

4. The novel dual-rotor engine body structure according to claim 1, characterized in that: The cooling system includes a water pump and front cover assembly (14), a water pump volute (3), an oil cooler (1), a thermostat and cover assembly (2), an inlet pipe and O-ring assembly (18), and a small circulation pipe and O-ring assembly (17). The water pump and front cover assembly (14) are simultaneously fixedly mounted on the front end of the front side shell (6) and the front end mounting surface of the oil pan (13). The counterweight bolt (23) has a keyway, and the water pump pin of the water pump and front cover assembly (14) is embedded in the keyway of the counterweight bolt (23). The oil cooler (1) is mounted on the mounting end face of the front end of the water pump and front cover assembly (14). The water pump volute (3) has a water passage end face connected to the water pump and front cover assembly (14). The water pump volute (3) is sealed and connected to the external radiator; the two ends of the water inlet pipe and O-ring assembly (18) are respectively connected to the water pump and front cover assembly (14) and the middle housing (7); the two ends of the small circulation pipe and O-ring assembly (17) are respectively connected to the middle housing (7) and the water pump and front cover assembly (14); the thermostat and cover assembly (2) are sealed and connected to the cooling system water passage, and the thermostat and cover assembly (2) is connected to the external radiator with a matching pipe.

5. The novel dual-rotor engine body structure according to claim 4, characterized in that: The water pump volute (3), the water pump and front cover assembly (14) internal water passage, water inlet pipe and O-ring assembly (18), the water passage of the housing system internal water passage, thermostat and cover assembly (2) are sequentially sealed and connected to form a large coolant circulation loop; the water passage of the housing system internal water passage, thermostat and cover assembly (2), small circulation pipe and O-ring assembly (17), the water pump and front cover assembly (14) internal water passage, and water pump volute (3) are sequentially sealed and connected to form a small coolant circulation loop.

6. The novel dual-rotor engine body structure according to claim 1, characterized in that: The eccentric shaft (27) has a through main oil passage at its center, and a radial oil outlet is provided at the crank position of the eccentric shaft (27), which is connected to the main oil passage.

7. The novel dual-rotor engine body structure according to claim 1, characterized in that: An oil-gas separator installation interface is reserved on the upper part of the intermediate shell (7). The oil-gas separator can be detachably assembled at the installation interface. The oil-gas separator is sealed and connected to the oil-gas separation channel pipeline inside the intermediate shell (7).

8. The novel dual-rotor engine body structure according to claim 1, characterized in that: The front rotor housing (12) and the rear rotor housing (11) have the same external outline, rotor profile, intake and exhaust passages and cooling system water passages.

9. The novel dual-rotor engine body structure according to claim 1, characterized in that: The flywheel (21) integrates a counterweight structure.

10. The novel dual-rotor engine body structure according to claim 1, characterized in that: The front shell (6), middle shell (7), front rotor shell (12), rear rotor shell (11) and rear shell assembly (8) are all integrated water-cooled cast shell structures. Sealing rings are installed between the mating surfaces of adjacent shells to achieve mutual sealing and communication of the internal water channels. Only the water inlet pipe and O-ring assembly (18) and the small circulation pipe and O-ring assembly (17) are installed on the outside of the shell.

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