Hybrid power system of combine harvester

Abstract

The utility model belongs to the technical field of mechanical structures, and particularly relates to a hybrid power system of a combine harvester, which comprises a master controller, a battery component, a generator, a threshing mechanism, a header conveying mechanism, a diesel engine, a traveling mechanism, a fan device and an auger vibrating screen mechanism. The battery assembly and the generator are electrically connected with the master controller. The diesel engine is electrically connected with the master controller through the engine controller; the threshing mechanism and the header conveying mechanism are electrically connected with the master controller through the electric drive unit. The power output end of the diesel engine is sequentially connected with the fan device, the walking mechanism and the generator, and a clutch I is arranged between the walking mechanism and the diesel engine; and the auger vibrating screen mechanism is in transmission connection with the power output end of the fan device. According to the technical scheme, energy utilization and economical efficiency are both considered, pollutant emission is reduced, endurance and operation efficiency is improved, power transmission control is flexible, mechanism driving modes are diversified, and many disadvantages of a traditional power system are overcome.

Description

TECHNICAL FIELD

[0001] The utility model belongs to mechanical structure technical field, concretely relates to a hybrid power system of combine harvester. BACKGROUND

[0002] At the moment of the continuous development of agricultural mechanization, as an important agricultural harvesting equipment, the power system of combine harvester plays a core supporting role. The traditional power source of combine harvester generally adopts internal combustion engine, and the internal combustion engine exposes many insurmountable drawbacks in the long-term use. On the one hand, the energy conversion efficiency of internal combustion engine is relatively low, and a large amount of fuel energy is wasted in the links such as combustion and transmission, which directly leads to the need to consume high fuel cost in the operation process of the harvester, causing the waste of energy. On the other hand, the internal combustion engine emits a large amount of harmful gases when working, including carbon monoxide, hydrocarbons, nitrogen oxides and particulate matter, etc. These pollutants not only cause serious damage to the surrounding air quality, but also pose a potential threat to the health of agricultural practitioners, which is contrary to the increasingly stringent environmental protection requirements at present.

[0003] With the rise of new energy technology, pure electric high-power power source brings new ideas to solve the problems of traditional internal combustion engine. The pure electric power system is nearly zero emission in the running process, greatly reduces the pollution to the environment, and meets the green agricultural development concept. However, at present, the application of pure electric power source in combine harvester also has obvious shortcomings. Firstly, the cost of battery and related supporting pure electric technology is high, which makes the whole cost of combine harvester increase greatly, which is beyond the bearing range of many farmers and agricultural production units, seriously hindering its large-scale popularization and application. Secondly, limited by the energy density and endurance technology bottleneck of the current battery, the endurance ability of pure electric combine harvester is seriously insufficient, and when working in large area farmland, it needs to be charged frequently, which greatly reduces the harvesting efficiency and cannot meet the high-intensity and long-time operation demand in busy season.

[0004] In summary, the shortcomings of traditional internal combustion engine power system and pure electric high-power power system limit the further development and optimization of combine harvester, and a new power solution is urgently needed. Under this background, the present technology proposes a hybrid power system of combine harvester. SUMMARY

[0005] The utility model aims at the deficiencies of the prior art, proposes a hybrid power system of combine harvester, and is committed to breaking through the existing difficulties, improving the performance and fuel economy of combine harvester in all directions, and promoting the development of agricultural mechanization to a higher quality stage.

[0006] The above-mentioned purposes are achieved by the following technical solutions:

[0007] The hybrid power system of a combine harvester comprises a general controller, a battery assembly, a generator, a threshing mechanism, a header conveying mechanism, a diesel engine, a traveling mechanism, a fan device and a beater-shaker mechanism. The battery assembly and the generator are electrically connected with the general controller respectively; the diesel engine is electrically connected with the general controller through an engine controller; the threshing mechanism and the header conveying mechanism are electrically connected with the general controller through an electric drive unit. The power output end of the diesel engine is connected with the fan device, the traveling mechanism and the generator in sequence, and a clutch I is arranged between the traveling mechanism and the diesel engine; the beater-shaker mechanism is drivingly connected with the power output end of the fan device.

[0008] Preferably, the fan device is drivingly connected with the diesel engine through a first transmission unit, and the first transmission unit comprises a first driving pulley, a first driven pulley and a first transmission belt; the first driving pulley is connected with the power output shaft of the diesel engine, the first driven pulley is connected with the power input shaft of the fan device, and the first driven pulley is drivingly connected with the first driving pulley through the first transmission belt.

[0009] Preferably, the traveling mechanism comprises a traveling assembly and a second transmission unit, and the second transmission unit comprises a second driving pulley, a second driven pulley and a second transmission belt; the second driving pulley is coaxially connected with the first driving pulley through the clutch I, and the power input shaft of the generator is coaxially fixedly connected with the second driving pulley; the first driven pulley is drivingly connected with the first driving pulley through the first transmission belt, and the traveling assembly is connected with the first driven pulley.

[0010] Preferably, the beater-shaker mechanism comprises a primary driving pulley, a primary driven pulley I, a primary driven pulley II, a primary transmission belt, a secondary driving pulley, a secondary driven pulley and a secondary transmission belt. The primary driven pulley I and the primary driven pulley II are drivingly connected with the primary driving pulley through the primary transmission belt, the primary driven pulley I is connected with a grain beater, and the primary driven pulley II is connected with a residue beater. The secondary driving pulley is coaxially fixedly connected with the primary driven pulley II, the secondary driven pulley is drivingly connected with the secondary driving pulley through the secondary transmission belt, and the secondary driven pulley is connected with a shaker.

[0011] Preferably, the electric drive unit comprises a driving motor I and a driving motor II; the threshing mechanism is electrically connected with the general controller through the driving motor I; and the header conveying mechanism is electrically connected with the general controller through the driving motor II.

[0012] Preferably, the electric drive unit comprises a general driving motor and a clutch II; the general driving motor is electrically connected with the general controller; and the threshing mechanism and the header conveying mechanism are drivingly connected with the general driving motor through the clutch II.

[0013] Preferably, the threshing mechanism comprises a speed reducer and a threshing cylinder, the power input end of the speed reducer is in transmission connection with the electric driving unit, and the threshing cylinder is in transmission connection with the power output end of the speed reducer through the clutch III.

[0014] Preferably, the threshing mechanism comprises a threshing cylinder and a third transmission unit, the third transmission unit comprises a third driving pulley, a third driven pulley and a third transmission belt, the third driving pulley is in transmission connection with the electric driving unit, the third driven pulley is in transmission connection with the third driving pulley through the third transmission belt, and the threshing cylinder is connected with the third driven pulley through a gear mechanism.

[0015] Preferably, the cutter table conveying mechanism comprises a beater, a conveying sprocket and a fourth transmission unit, the fourth transmission unit comprises a fourth driving pulley, a fourth driven pulley and a fourth transmission belt, the fourth driving pulley is in transmission connection with the electric driving unit, the fourth driven pulley is in transmission connection with the fourth driving pulley through the fourth transmission belt, and the beater and the conveying sprocket are respectively connected with the fourth driven pulley.

[0016] The technical scheme has the following beneficial effects:

[0017] 1) Improve the comprehensive energy utilization efficiency: adopt the hybrid power system, combine the diesel engine and the electric driving, compared with the traditional pure internal combustion engine power system, can more reasonably allocate energy according to different operation links and working conditions, avoid the case that a large amount of energy is wasted in each link like internal combustion engine, help to improve the overall energy utilization efficiency, and then reduce the fuel cost, improve the fuel economy, overcome the disadvantages of low energy conversion efficiency of traditional internal combustion engine.

[0018] 2) Reduce the cost pressure of equipment: compared with the existing pure electric power source, the hybrid power system of the technical scheme combines the diesel engine with relatively controllable cost, can avoid the problem of high cost caused by pure electric technology to a certain extent, so that the whole machine cost is in a relatively more reasonable range, which is more conducive to being accepted by farmers and agricultural production units, and solves the problem that the high cost of pure electric power source hinders the promotion.

[0019] 3) Reduce pollution emissions: the hybrid power system integrates the electric driving unit and other parts, which can be driven by electric energy in some operation links, compared with the traditional internal combustion engine which emits a large amount of carbon monoxide, hydrocarbons, nitrogen oxides and particulate matter and other harmful gases, the hybrid power system can realize zero emission or reduce emission under some working conditions, which meets the current green agricultural development concept, improves the disadvantages of traditional internal combustion engine in damaging the surrounding air quality and threatening the health of practitioners and other environmental protection aspects.

[0020] 4) Improve the continuity of the endurance guarantee operation: Because there is a diesel engine as a power supplement, unlike pure electric combines that are limited by the current battery energy density and endurance technology bottlenecks and need to be charged frequently, in large-area farmland continuous operation, the hybrid power system can rely on the diesel engine to provide continuous power, reduce downtime, and ensure the continuity of the harvesting operation, thereby improving the harvesting efficiency, meeting the high-intensity and long-time operation demand during the busy farming season, and overcoming the short board of pure electric power source endurance shortage.

[0021] 5) Flexible power transmission and control configuration: Through the total controller to electrically connect and reasonably control the power transmission of the battery assembly, generator, diesel engine and each working mechanism (such as the threshing mechanism, header conveying mechanism, etc.), multiple transmission units and clutches are set up, which can realize flexible switching and precise control of power transmission between mechanisms, so that the combine harvester can coordinate each mechanism in different working scenarios, and optimize the overall working performance. This is a more advantageous place in the functional structure design compared to traditional single power source combine harvesters.

[0022] 6, Diversified mechanism driving implementation: For key working mechanisms such as the threshing mechanism and the header conveying mechanism, multiple feasible electric drive unit specific configuration methods are given, providing more diverse design options for optimization and adjustment according to actual production, manufacturing and use requirements, and enhancing the overall applicability and reliability of the system. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 is a schematic diagram of the structure of a preferred structure of a combine harvester hybrid power system;

[0024] Figure 2 is a schematic diagram of the structure of another preferred structure of a combine harvester hybrid power system.

[0025] Among them:

[0026] 1. master controller; 2. battery assembly; 3. generator; 4. diesel engine; 5. fan device; 6. engine controller; 7. clutch I; 8. first driving pulley; 9. first driven pulley; 10. first transmission belt; 11. traveling assembly; 12. second driving pulley; 13. second driven pulley; 14. second transmission belt; 15. first stage driving pulley; 16. first stage driven pulley I; 17. first stage driven pulley II; 18. first stage transmission belt; 19. second stage driving pulley; 20. second stage driven pulley; 21. second stage transmission belt; 22. kernel auger; 23. chaff auger; 24. vibrating screen; 25. driving motor I; 26. driving motor II; 27. master driving motor; 28. clutch II; 29. speed reducer; 30. threshing cylinder; 31. clutch III; 32. third driving pulley; 33. third driven pulley; 34. third transmission belt; 35. gear mechanism; 36. conveying sprocket; 37. fourth driving pulley; 38. fourth driven pulley; 39. fourth transmission belt. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical scheme and advantages of the utility model clearer, the technical scheme in the utility model will be described clearly and completely below in combination with the drawings in the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, rather than all the embodiments.

[0028] Therefore, the following detailed description of the utility model provided in the drawings is not intended to limit the scope of the claimed utility model, but only represents selected embodiments of the utility model. Based on the embodiments in the utility model, all other embodiments obtained by those of ordinary skill in the art without creative labor belong to the scope of protection of the utility model.

[0029] In the description of the utility model, it should be understood that the terms "center", "upper", "lower", "left", "right", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the utility model.

[0030] In the utility model, unless another definite provision and limitation, the terms "mount", "fit", "connect", "fix" and the like terms should do broad sense understanding, for example, can be fixed connection, also can be detachable connection, or integrally connect;Can be mechanical connection, can be direct connection, also can be indirectly connected through intermediate medium, can be two element internal communication.For ordinary skilled in the art, the above terms can be understood according to the specific meaning of the terms in the utility model.

[0031] Embodiment 1

[0032] The embodiment discloses a hybrid power system of a combine harvester, as a preferred embodiment of the technical scheme, as shown in Figure 1 Figure, including total controller 1, battery assembly 2, generator 3, threshing mechanism, header conveying mechanism, diesel engine 4, walking mechanism, fan device 5 and auger shaker mechanism, each part closely cooperates, and supports the efficient operation of the harvester.

[0033] Electrical connection: battery assembly 2 and generator 3 are electrically connected with total controller 1 respectively, to ensure the accurate deployment and control of electric energy.Diesel engine 4 is electrically connected with total controller 1 through engine controller 6, and the link enables total controller 1 to control the running state of diesel engine 4 in real time and issue accurate instructions.Threshing mechanism and header conveying mechanism are electrically connected with total controller 1 through electric drive unit, to provide power support for stable and efficient operation.

[0034] Mechanical connection: the power output end of diesel engine 4 is connected with fan device 5, walking mechanism and generator 3 in sequence, wherein a clutch I 7 is arranged between the walking mechanism and diesel engine 4, and the clutch I 7 lays a foundation for flexible switching of power transmission under different working conditions.The auger shaker mechanism is drivingly connected with the power output end of fan device 5, to realize power relay transmission and guarantee the smooth operation of the related working process.

[0035] The threshing mechanism and the header conveying mechanism are electrically connected with the total controller 1 through the electric drive unit.The power output end of the diesel engine 4 is connected with the fan device 5, the walking mechanism and the generator 3 in sequence, and the walking mechanism and the diesel engine 4 are provided with the clutch I 7;The auger shaker mechanism is drivingly connected with the power output end of the fan device 5.

[0036] The diesel engine 4 is used as an initial power source, the output power of which drives the generator 3 to operate, the generator 3 converts kinetic energy into electric energy, and then the electric energy is stored in the battery assembly 2 under the overall arrangement of the general controller 1. This process not only realizes the multi-transformation of energy, but also reserves resources for subsequent flexible power use. For the walking mechanism and the fan device 5, the stirring dragon vibration screen mechanism and other loads with small power consumption and small changes, a direct connection with the diesel engine 4 is adopted, the stable power output of the diesel engine 4 is fully utilized, the stable operation of the diesel engine 4 is ensured, and the system complexity and energy consumption are reduced. The threshing mechanism has large load and large load impact, and the driving mode of converting the stored electric energy into kinetic energy by the electric drive unit is adopted, the impact is effectively buffered, the operation parameters are accurately controlled, and the threshing quality is ensured. The load of the header conveying mechanism is relatively medium, the impact is relatively medium, and the conversion of electric energy into kinetic energy is realized by relying on the electric drive unit, and the operation efficiency and stability are considered.

[0037] The general controller 1 is used as the “brain” of the system, and integrates the key functions of electric drive control, generator 3 control, battery assembly 2 control, electric energy conversion and distribution. It collects the running signals such as the vehicle speed, the load size and the rotating speed of each part in real time, dynamically adjusts the working states of the diesel engine 4, the generator 3 and each related mechanism according to the preset control strategy, and achieves automatic and seamless switching of the power driving mode under different working conditions.

[0038] Under normal load working conditions: the diesel engine 4 drives the walking mechanism and small load (such as the fan device 5 and the stirring dragon vibration screen mechanism) to operate, maintains the basic movement and auxiliary operation of the harvester, and drives the generator 3 to generate electricity at the same time. The electric energy is stored in the battery assembly 2. The battery assembly 2 supplies power to the electric drive unit to drive the threshing mechanism and the header conveying mechanism. In this mode, the fuel economy of the diesel engine 4 is significantly improved, and the energy is used efficiently.

[0039] Under heavy load working conditions: the diesel engine 4 drives the generator 3 to generate electricity at full capacity, and the generator 3 outputs electric energy and the battery assembly 2 supplies power to the electric drive unit. When the harvester faces a sudden increase in feeding amount, the load of the header conveying mechanism and the threshing mechanism increases rapidly, this power supply mode can quickly respond, stabilize the rotating speed of the threshing mechanism, prevent the quality of the threshing mechanism from declining, and stabilize the rotating speed of the diesel engine 4 to prevent the walking mechanism, the fan device 5 and the stirring dragon vibration screen mechanism from running out of speed, and ensure the coherence of the overall operation.

[0040] Under the working condition of the harvester turning field, only the walking mechanism works, the system converts the generator 3 into a driving mode, disconnects the clutch I 7 between the walking mechanism and the diesel engine 4, and changes the power supply of the generator 3 from the diesel engine 4 to the battery assembly 2 to drive the walking mechanism. At this time, it is a pure electric walking mode, which reduces fuel consumption and meets the low power consumption demand during the turning field.

[0041] In summary, the combined harvester hybrid power system improves the operation efficiency, energy utilization rate and running stability of the harvester in different working conditions through ingenious structural design, intelligent control strategy and flexible power distribution, and provides strong technical support for modern agricultural harvesting operations.

[0042] Embodiment 2

[0043] The embodiment discloses a hybrid power system of a combined harvester, which is a preferred embodiment of the technical solution, that is, based on embodiment 1, the fan device 5 is in transmission connection with the diesel engine 4 through the first transmission unit, and the first transmission unit comprises a first driving pulley 8, a first driven pulley 9 and a first transmission belt 10. The first driving pulley 8 is connected with the power output shaft of the diesel engine 4, the first driven pulley 9 is connected with the power input shaft of the fan device 5, and the first driven pulley 9 is in transmission connection with the first driving pulley 8 through the first transmission belt 10. This structure can effectively buffer the impact of the output power of the diesel engine 4, ensure that the fan device 5 stably receives power and stably operates, and provide stable wind power support for the cleaning and other links in the harvesting operation.

[0044] Embodiment 3

[0045] The embodiment discloses a hybrid power system of a combined harvester, which is a preferred embodiment of the technical solution, that is, based on embodiment 2, the traveling mechanism comprises a traveling assembly 11 and a second transmission unit, and the second transmission unit comprises a second driving pulley 12, a second driven pulley 13 and a second transmission belt 14. The second driving pulley 12 is coaxially connected with the first driving pulley 8 through the clutch I, and the power input shaft of the generator 3 is coaxially fixedly connected with the second driving pulley 12. This coaxial connection layout makes the power distribution more compact and efficient, and facilitates quick switching of the power flow direction in different working conditions. The first driven pulley 9 is in transmission connection with the first driving pulley 8 through the first transmission belt 10, the traveling assembly 11 is connected with the first driven pulley 9, and the traveling mechanism can be directly driven by the power of the diesel engine 4 and can flexibly adjust the power source in a specific mode, thereby ensuring that the harvester moves flexibly in the field.

[0046] Embodiment 4

[0047] The embodiment discloses a hybrid power system of a combined harvester, which is a preferred embodiment of the technical solution, that is, based on embodiment 1, 2 or 3, the auger-vibrating screen mechanism comprises a primary driving pulley 15, a primary driven pulley I 16, a primary driven pulley II 17, a primary transmission belt 18, a secondary driving pulley 19, a secondary driven pulley 20 and a secondary transmission belt 21.

[0048] The first driven pulley I and the first driven pulley II are in transmission connection with the first driving pulley 15 through the first transmission belt 18, the first driven pulley I is connected with the grain stirring dragon 22, and the first driven pulley II is connected with the waste stirring dragon 23. This double driven pulley design can accurately distribute power to the grain stirring dragon 22 and the waste stirring dragon 23 according to different material processing needs, and improve the efficiency of material separation and screening.

[0049] The second driving pulley 19 is coaxially fixedly connected with the first driven pulley II, realizing seamless connection and transmission of power; the second driven pulley 20 is in transmission connection with the second driving pulley 19 through the second transmission belt 21, and the second driven pulley 20 is connected with the vibrating screen 24. Through the combination of two-stage transmission pulleys, the power is stably transmitted to the vibrating screen 24, ensuring its stable vibration and effectively separating grains, wastes and straws, etc., and ensuring the purity of the harvested grains.

[0050] Example 5

[0051] This embodiment discloses a hybrid power system of a combine harvester, which is a preferred embodiment of the technical solution, i.e., based on examples 1, 2, 3 or 4, the electric drive unit includes driving motor I 25 and driving motor II 26.

[0052] The threshing mechanism is electrically connected with the total controller 1 through the driving motor I 25, so that the total controller 1 can accurately control the driving motor I to provide appropriate electric energy for the threshing mechanism to drive it to operate stably and effectively cope with large load and impact during threshing operation.

[0053] The header conveying mechanism is electrically connected with the total controller 1 through the driving motor II 26, which ensures that the header conveying mechanism can obtain appropriate power through the driving motor II under the command of the total controller 1 to operate stably and efficiently according to the operation requirements.

[0054] Example 6

[0055] This embodiment discloses a hybrid power system of a combine harvester, which is a preferred embodiment of the technical solution, i.e., based on examples 1, 2, 3 or 4, the electric drive unit includes a total driving motor 27 and a clutch II 28. The total driving motor 27 is electrically connected with the total controller 1 to accept the electric power allocation instructions of the total controller 1, and the threshing mechanism and the header conveying mechanism are in transmission connection with the total driving motor 27 through the clutch II, which can flexibly switch the power transmission through the clutch function of the clutch II, and selectively supply power to the threshing mechanism and the header conveying mechanism according to different working conditions.

[0056] Example 7

[0057] The embodiment discloses a hybrid power system of a combine harvester, which is a preferred embodiment of the technical scheme, that is, based on any one of embodiments 1-6, the threshing mechanism comprises a reducer 29 and a threshing cylinder 30, the power input end of the reducer 29 is in transmission connection with the electric driving unit, and the reducer 29 can reasonably reduce speed and increase torque according to the power output by the electric driving unit to adapt to the working requirement of the threshing cylinder 30. The threshing cylinder 30 is in transmission connection with the power output end of the reducer 29 through a clutch III, and the clutch III is used for flexibly controlling power transmission in special working conditions such as starting, parking or overload, thereby protecting the equipment and optimizing operation.

[0058] Embodiment 8

[0059] The embodiment discloses a hybrid power system of a combine harvester, which is a preferred embodiment of the technical scheme, that is, based on any one of embodiments 1-6, the threshing mechanism comprises a threshing cylinder 30 and a third transmission unit, the third transmission unit comprises a third driving pulley 32, a third driven pulley 33 and a third transmission belt 34. The third driving pulley 32 is in transmission connection with the electric driving unit, and after receiving power, the third driving pulley 32 drives the third driven pulley 33 to rotate through the third transmission belt 34. The pulley belt transmission mode has good buffering performance and can reduce power impact. The threshing cylinder 30 is connected with the third driven pulley 33 through a gear mechanism 35. The power input end of the gear mechanism 35 is connected, and the power output end of the gear mechanism 35 is connected with the threshing cylinder 30. The gear mechanism 35 is arranged to facilitate power steering, and facilitates the threshing cylinder to be installed in a predetermined direction under the compact structure layout of the combine harvester.

[0060] Embodiment 9

[0061] The embodiment discloses a hybrid power system of a combine harvester, which is a preferred embodiment of the technical scheme, that is, based on any one of embodiments 1-8, the header conveying mechanism comprises a crop divaricator, a conveying sprocket 36 and a fourth transmission unit, the fourth transmission unit comprises a fourth driving pulley 37, a fourth driven pulley 38 and a fourth transmission belt 39. The fourth driving pulley 37 is in transmission connection with the electric driving unit, receives power from the electric driving unit, and the fourth driven pulley 38 is in transmission connection with the fourth driving pulley 37 through the fourth transmission belt 39. The pulley belt transmission structure can effectively buffer the impact in the power transmission process and guarantee the stability of power transmission. The crop divaricator and the conveying sprocket 36 are respectively connected with the fourth driven pulley 38, so that stable power is obtained to drive the rotation of the crop divaricator and the conveying sprocket 36. In the harvesting operation, the crop divaricator can accurately lift and guide crops to a cutting knife, so that the harvesting process is ensured to be smoothly performed and the harvesting efficiency is improved. The harvested crops are conveyed to the threshing mechanism by the conveying sprocket 36.

Claims

1. A hybrid power system for a combine harvester, characterized by: The total controller (1), the battery assembly (2), the generator (3), a threshing mechanism, a header conveying mechanism, a diesel engine (4), a traveling mechanism, a fan device (5) and a beater screen mechanism are arranged on the combine harvester (1). The battery assembly (2) and the generator (3) are electrically connected with the total controller (1) respectively; the diesel engine (4) is electrically connected with the total controller (1) through an engine controller (6); the threshing mechanism and the header conveying mechanism are electrically connected with the total controller (1) through an electric drive unit. The power output end of the diesel engine (4) is connected with the fan device (5), the traveling mechanism and the generator (3) in sequence, and a clutch I (7) is arranged between the traveling mechanism and the diesel engine (4); the beater screen mechanism is drivingly connected with the power output end of the fan device (5).

2. The hybrid power system of a combine harvester as claimed in claim 1, wherein: The fan device (5) is drivingly connected with the diesel engine (4) through a first transmission unit, and the first transmission unit comprises a first driving pulley (8), a first driven pulley (9) and a first transmission belt (10); the first driving pulley (8) is connected with the power output shaft of the diesel engine (4), the first driven pulley (9) is connected with the power input shaft of the fan device (5), and the first driven pulley (9) is drivingly connected with the first driving pulley (8) through the first transmission belt (10).

3. The hybrid power system of a combine harvester as claimed in claim 2, wherein: The traveling mechanism comprises a traveling assembly (11) and a second transmission unit, and the second transmission unit comprises a second driving pulley (12), a second driven pulley (13) and a second transmission belt (14); the second driving pulley (12) is coaxially connected with the first driving pulley (8) through the clutch I (7), and the power input shaft of the generator (3) is coaxially fixedly connected with the second driving pulley (12); the first driven pulley (9) is drivingly connected with the first driving pulley (8) through the first transmission belt (10), and the traveling assembly (11) is connected with the first driven pulley (9).

4. The hybrid power system of claim 1, wherein: The beater screen mechanism comprises a primary driving pulley (15), a primary driven pulley I (16), a primary driven pulley II (17), a primary transmission belt (18), a secondary driving pulley (19), a secondary driven pulley (20) and a secondary transmission belt (21); The primary driven pulley I (16) and the primary driven pulley II (17) are drivingly connected with the primary driving pulley (15) through the primary transmission belt (18), and the primary driven pulley I (16) is connected with a seed beater (22), and the primary driven pulley II (17) is connected with a waste beater (23); The secondary driving pulley (19) is coaxially fixedly connected with the primary driven pulley II (17), the secondary driven pulley (20) is drivingly connected with the secondary driving pulley (19) through the secondary transmission belt (21), and the secondary driven pulley (20) is connected with a vibrating screen (24).

5. The hybrid power system of claim 1, wherein: The electric drive unit comprises a driving motor I (25) and a driving motor II (26); the threshing mechanism is electrically connected with the total controller (1) through the driving motor I (25); and the header conveying mechanism is electrically connected with the total controller (1) through the driving motor II (26).

6. The hybrid power system of claim 1, wherein: The electric drive unit comprises a total drive motor (27) and a clutch II (28); the total drive motor (27) is electrically connected with the total controller (1); the threshing mechanism and the header conveying mechanism are drivingly connected with the total drive motor (27) through the clutch II (28).

7. The hybrid power system of claim 1, wherein: The threshing mechanism comprises a speed reducer (29) and a threshing cylinder (30); the power input end of the speed reducer (29) is drivingly connected with the electric drive unit; the threshing cylinder (30) is drivingly connected with the power output end of the speed reducer (29) through a clutch III (31).

8. The hybrid power system of claim 1, wherein: The threshing mechanism comprises a threshing cylinder (30) and a third transmission unit; the third transmission unit comprises a third driving pulley (32), a third driven pulley (33) and a third transmission belt (34); the third driving pulley (32) is drivingly connected with the electric drive unit; the third driven pulley (33) is drivingly connected with the third driving pulley (32) through the third transmission belt (34); the threshing cylinder (30) is connected with the third driven pulley (33) through a gear mechanism (35).

9. The hybrid power system of claim 1, wherein: The header conveying mechanism comprises a beater, a conveying sprocket (36) and a fourth transmission unit; the fourth transmission unit comprises a fourth driving pulley (37), a fourth driven pulley (38) and a fourth transmission belt (39); the fourth driving pulley (37) is drivingly connected with the electric drive unit; the fourth driven pulley (38) is drivingly connected with the fourth driving pulley (37) through the fourth transmission belt (39); the beater and the conveying sprocket (36) are respectively connected with the fourth driven pulley (38).

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