CN-224228975-U - Full hydraulic variable driving system for fresh corn

Abstract

The utility model relates to the technical field of full-hydraulic variable driving systems, in particular to a full-hydraulic variable driving system for fresh corn, which comprises an engine, a transfer case, a traveling pump and a fan pump, wherein the transfer case is arranged at the output end of the engine, the traveling pump and the fan pump are respectively arranged at the output end of the transfer case, a traveling motor is arranged at the output end of the traveling pump, and a gearbox is arranged at the output end of the traveling motor. The utility model controls the walking speed through a closed loop electric proportion PWM technology, abandons the traditional stepless speed change and oil cylinder control mode, ensures that the walking speed is linearly changed through PWM electric proportion control, solves the defects of inaccurate speed control, complex operation, high failure rate and the like, combines the low-speed operation accuracy and high-speed transition efficiency, and adapts to various operation and transition requirements.

Inventors

• ZHAO WEI
• LI ZHIBO
• ZHANG XIN
• LIN JUNTANG
• WU JINGWEN
• YE TONG
• LAN HAITAO
• LIU XINGBO
• YANG JINZHUAN
• NIE MEILING
• CHANG JIANGUO
• SUN SHIMING
• XING LULU

Assignees

• 黑龙江省农业机械工程科学研究院

Dates

Publication Date

20260512

Application Date

20250703

Claims (7)

1. 1. The full-hydraulic variable driving system for the fresh corn comprises an engine (1) and is characterized by further comprising a transfer case (2), a traveling pump (3) and a fan pump (5), wherein the transfer case (2) is arranged at the output end of the engine (1), the traveling pump (3) and the fan pump (5) are respectively arranged at the output end of the transfer case (2), a traveling motor (4) is arranged at the output end of the traveling pump (3), a gearbox (8) is arranged at the output end of the traveling motor (4), a traveling output end (10) is arranged at the output end of the gearbox (8), a fan motor (7) is arranged at the output end of the fan pump (5), a header pump (6) is arranged at the output end of the header pump (3), and PLC (11) is arranged at the input ends of electric control units of the traveling motor (4), the traveling pump (3), the fan pump (5) and the header pump (6).
2. 2. The full-hydraulic variable driving system for fresh corn according to claim 1, wherein the engine (1) drives the transfer case (2) and divides power to the traveling pump (3), the fan pump (5) and the header pump (6), and the traveling pump (3), the fan pump (5) and the header pump (6) respectively drive the traveling motor (4), the fan motor (7) and the header motor (9).
3. 3. The full-hydraulic variable driving system for fresh corn according to claim 1, wherein the PLC (11) controls the flow of the traveling pump (3) in a linear manner through PWM electric proportion to drive the traveling motor (4) to rotate in a linear manner.
4. 4. The full hydraulic variable driving system for fresh corn according to claim 1, wherein the high and low speed switches of the traveling motor (4) are arranged such that the range of the low speed range covering the 1 st gear is 0-8km/h, the range of the 2 nd gear is 0-31km/h, the range of the high speed range covering the 1 st gear is 0-11km/h, and the range of the 2 nd gear is 0-37km/h.
5. 5. The full hydraulic variable driving system for fresh corn according to claim 1, wherein the PLC (11) controls the displacement of the header pump (6) through PWM electric proportion, so that the rotating speed of the header motor (9) is linearly regulated within the range of 0-600 r/min.
6. 6. The full hydraulic variable driving system for fresh corn according to claim 1, wherein the PLC (11) controls the fan pump (5) through PWM electric proportion, so that the rotating speed of the fan motor (7) is linearly regulated within the range of 0-1800 r/min.
7. 7. The full hydraulic variable drive system for fresh corn according to claim 1, wherein the PLC (11) uses PWM electric proportional control output, and the working current of the PLC (11) is 800-1200 mA.

Description

Full hydraulic variable driving system for fresh corn Technical Field The utility model relates to the technical field of full hydraulic variable driving systems, in particular to a full hydraulic variable driving system for fresh corn. Background At the present time of rapid development of agricultural mechanization, the efficient operation of the corn harvester is significant for improving the corn harvesting efficiency and reducing the labor intensity of farmers, wherein a driving adjusting system is used as a core part of the corn harvester, the operation performance and the adaptability of the whole harvester are directly related, at present, most corn harvesters adopt stepless speed change and oil cylinder control adjusting modes, although the stepless speed change can realize speed adjustment to a certain extent, the problem of inaccurate output speed exists, the harvester is difficult to maintain the optimal operation speed when facing complex terrains and different crop growth conditions, the harvesting efficiency and the harvesting quality are influenced, the oil cylinder control adjusting operation is complicated, a plurality of control elements are required to be frequently operated by a driver to adjust related parameters, the labor intensity is increased, the operation faults are easily caused due to misoperation, in the long-term use of the two adjusting modes, the fault rate is high due to the reasons of component abrasion, the leakage of a hydraulic system and the like, the frequent maintenance is increased, and the agricultural time is delayed. In addition, when fresh corn is in the period of milk ripeness, the plant spacing presents various states, the traditional corn header parameter adjustment range is narrower, the complex plant spacing change can not be flexibly adapted, the problems of missing cutting, cutting injury and the like often occur, grain waste is caused, the application of a corn harvester in a fresh corn harvesting scene is greatly limited, and the requirements of accurate, efficient and strong-adaptability harvesting operation of agricultural modernization are difficult to meet. Disclosure of utility model In order to solve the problems that the existing corn harvester uses stepless speed change and oil cylinder control adjustment, has inaccurate output speed, complex operation and high failure rate, and also solves the problem that the machine cannot adapt to complex scenes due to the fact that the pitch of plants in the fresh corn milk ripening period is various and the parameter adjustment range of a traditional header is narrow, the utility model provides a full-hydraulic variable driving system for fresh corn. The technical scheme is that the full-hydraulic variable driving system for fresh corn comprises an engine, a transfer case, a traveling pump and a fan pump, wherein the transfer case is arranged at the output end of the engine, the traveling pump and the fan pump are respectively arranged at the output end of the transfer case, a traveling motor is arranged at the output end of the traveling pump, a gearbox is arranged at the output end of the traveling motor, a traveling output end is arranged at the output end of the gearbox, the fan motor is arranged at the output end of the fan pump, a header pump is arranged at the output end of the traveling pump, a header motor is arranged at the output end of the header pump, and a PLC (programmable logic controller) is arranged at the input ends of electric control units of the traveling motor, the traveling pump, the fan pump and the header pump. Further, the engine drives the transfer case and distributes power to the traveling pump, the fan pump and the header pump, and the traveling pump, the fan pump and the header pump respectively drive the traveling motor, the fan motor and the header motor. Further, the PLC controls the flow of the traveling pump in a linear adjustment mode through PWM electric proportion, and drives the traveling motor to linearly adjust the rotating speed. Further, the high-speed switch and the low-speed switch of the walking motor are characterized in that the range of a low-speed gear cover gear is 0-8km/h, the range of a 2-speed gear cover gear is 0-31km/h, the range of a high-speed gear cover gear 1 is 0-11km/h, and the range of the 2-speed gear cover gear is 0-37km/h, so that a 'two-gear four-speed' is formed, the precision of low-speed operation is ensured, and the efficiency of high-speed transition is met. Further, the PLC controls the discharge capacity of the header pump through PWM electric proportion, so that the rotating speed of the header motor is linearly regulated within the range of 0-600r/min, thereby flexibly regulating the operation rhythms of cutting, conveying and the like of the header, adapting to different plant spacing and realizing large-range parameter regulation. Further, the PLC controls the fan pump through PWM electric proportion, so that the rotating spee