Proportional control whole-stalk type sugarcane harvester electro-hydraulic system

Abstract

The utility model provides a proportional control whole stalk type sugarcane harvesting machine electro-hydraulic system, which relates to the technical field of electro-hydraulic systems and comprises an engine, a system working main pump, a system working hydraulic system and a walking hydraulic system. The system working hydraulic system comprises a system working valve, a sugarcane righting motor, a sugarcane root cutting motor, a sugarcane conveying motor and a stalk and leaf stripping motor, and the system working main pump is connected with the sugarcane righting motor, the sugarcane root cutting motor, the sugarcane conveying motor and the stalk and leaf stripping motor through the system working valve; the walking hydraulic system comprises a walking system pump and walking motors. The walking system pump is connected with the walking motors corresponding to a left crawler belt and a right crawler belt of the sugarcane harvester through walking system control valves. The electro-hydraulic system has a proportional control function on the main actions of the cane harvester, and is matched with the motor, the valve group, the controller, the sensor and other components to realize intelligent control, improve the use efficiency of the engine and reduce the waste of useless work.

Description

Technical Field

[0001] The utility model relates to the technical field of electro-hydraulic systems, and more specifically to an electro-hydraulic system of a proportionally controlled whole-stalk sugarcane harvester. Background Art

[0002] In the process of sugarcane production, the most miserable part for farmers is the harvesting process. The emergence of harvesters has greatly liberated labor, greatly improved efficiency, and is not affected by windy and rainy weather. The comprehensive cost calculation is also much better than manual harvesting. However, the current level of mechanization of sugarcane harvesting in my country is not high. Usually, before the harvesting operation, the sugarcane leaves in the planting field are burned artificially, and then the sugarcane is fed into a cutting harvester with a cutting device to cut the harvestable sugarcane into short sugarcane segments of 200-250 mm. This type of harvester is mainly a cutting type. Although it has high working efficiency, the sugarcane harvested in this way is usually unqualified because of its high impurity content, which requires manual removal later. Compared with the segmented harvesting form, whole-stalk sugarcane is storable and has a low impurity content, which is more popular with sugar factories and has a relatively high purchase price, which is more in line with the interests of all parties. Therefore, a whole-stalk sugarcane harvester is selected for sugarcane harvesting. The hydraulic system of the existing whole-stalk sugarcane harvester has the problems of low intelligent control, greater operating difficulty and low operating comfort. With the continuous development of high-end agricultural machinery and equipment in the future, it will be a general trend to actively research and develop the application of electro-hydraulic control technology in the hydraulic system of sugarcane harvesters. Utility Model Content

[0003] To achieve the above-mentioned purpose, the technical solution adopted by the utility model is: to provide a proportionally controlled whole-stalk sugarcane harvester electro-hydraulic system, including an engine, a system working main pump, a system working hydraulic system, and a travel hydraulic system. The system working hydraulic system includes a system working valve, a sugarcane straightening motor, a sugarcane root cutting motor, a sugarcane conveying motor, and a stalk and leaf stripping motor. The system working main pump is respectively connected to the sugarcane straightening motor, the sugarcane root cutting motor, the sugarcane conveying motor, and the stalk and leaf stripping motor through the system working valve; the travel hydraulic system includes a travel system pump and a travel motor. The travel system pump is respectively connected to the travel motors corresponding to the left and right crawlers of the sugarcane harvester through the travel system control valve.

[0004] Furthermore, the travel hydraulic system also includes a load-sensitive circuit oil extraction device, which is respectively connected to the travel system pump, the travel system control valve, and the frame motion control valve.

[0005] Furthermore, the engine is connected to the top tip cutting pump, and the top tip cutting pump is connected to the tip cutting motor through the tip cutting control valve.

[0006] Furthermore, the travel system control valve is a proportional control multi-way valve.

[0007] Furthermore, the oil return circuits of the system working valve, the travel system control valve and the rack motion control valve enter the three-in-one radiator through the integrated oil return of the valve block.

[0008] Furthermore, the engine is connected to the system working main pump and the travel system pump respectively through the transfer case.

[0009] Furthermore, the load-sensitive hydraulic circuit oil extraction device includes an oil inlet and an oil outlet, and a reversing valve is arranged on the oil circuit between the oil inlet and the oil outlet; a throttling speed regulating valve is arranged on the oil circuit between the oil outlet and the reversing valve; the oil extraction device also includes a load-sensitive system, and the load-sensitive system includes a signal comparison shuttle valve, and the signal comparison shuttle valve and the oil circuit between the throttling speed regulating valve and the oil outlet are connected.

[0010] Furthermore, the signal comparison shuttle valve is connected to the external signal oil port and the signal output oil port respectively.

[0011] Furthermore, the reversing valve is a two-position two-way reversing valve. When the valve core of the two-position two-way reversing valve is in the first position, the oil is conducted to the oil outlet; when the valve core of the two-position two-way reversing valve is in the second position, the oil circuit between the oil inlet and the oil outlet is cut off.

[0012] Furthermore, an inlet check valve is provided on the oil circuit between the oil inlet and the reversing valve.

[0013] The proportionally controlled electro-hydraulic system of the whole-stalk sugarcane harvester of the utility model is applied to the whole-stalk sugarcane harvester for automatic harvesting of sugarcane, which can greatly liberate labor, greatly improve the sugarcane harvesting efficiency, and is not affected by windy and rainy weather, and the comprehensive cost calculation is also much better than manual harvesting; the electro-hydraulic system of the utility model has a proportional adjustment function in the main actions of the sugarcane harvester, cooperates with the motor and valve group as well as the controller and sensor components to realize intelligent control, realize the intelligent upgrade of the whole vehicle, improve the use efficiency of the engine, reduce the waste of useless work, and various auxiliary functions greatly reduce the operation difficulty of the sugarcane harvester, and the intelligent control improves the operation comfort. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0015] Figure 1 The utility model is a schematic diagram of the structure of the proportionally controlled whole-stalk sugarcane harvester electro-hydraulic system.

[0016] Figure 2 This is a schematic diagram of the structure of the oil extraction device for the load-sensitive hydraulic circuit.

[0017] Explanation of symbols in the figure:

[0018] 1. Engine; 2. Transfer case; 3. System working main pump; 4. System working valve; 5. Travel system pump; 6. Travel system control valve; 7. High and low speed switching valve; 8. Travel motor; 9. Load sensing circuit oil extraction device; 10. Rack action control valve; 11. Three-in-one radiator; 12. Top tip cutting pump; 13. Tip cutting control valve;

[0019] 901, reversing valve; 902, throttling speed regulating valve; 903, signal comparison shuttle valve; 904, inlet check valve; 905, oil inlet; 906, oil outlet; 907, signal output oil port; 908, external signal oil port. DETAILED DESCRIPTION

[0020] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0021] The proportional control whole-stalk sugarcane harvester electro-hydraulic system provided by the embodiment of the utility model is now described. Figure 1 As shown, the proportionally controlled whole-stalk sugarcane harvester electro-hydraulic system of the utility model includes an engine 1, a system working main pump 3, a system working hydraulic system, and a travel hydraulic system. The travel hydraulic system includes a travel system pump 5 and a travel motor 8. The travel system pump 5 is connected to the travel motors 8 corresponding to the left and right crawlers of the sugarcane harvester through a travel system control valve 6.

[0022] The engine 1 is connected to the system working main pump 3 and the travel system pump 5 through the transfer case 2, wherein the engine 1 provides the working power for the entire electro-hydraulic system by burning diesel. Since the sugarcane harvester needs to match the spacing between field ridges, the frame of the whole vehicle is very compact and the series pump cannot be installed, so the transfer case 2 is selected to reduce the overall size.

[0023] The system working main pump 3 is load sensitive and constant power controlled. It provides the required pressure and flow while limiting the overall power, which can ensure that the actuators of the main actions of the sugarcane harvester can work normally, and the engine 1 will not be shut down due to exceeding the system demand power.

[0024] The system working hydraulic system includes a system working valve 4, a sugarcane straightening motor, a sugarcane root cutting motor, a sugarcane conveying motor, and a stalk and leaf stripping motor. The system working main pump 3 is connected to the sugarcane straightening motor, the sugarcane root cutting motor, the sugarcane conveying motor, and the stalk and leaf stripping motor through the system working valve 4. The four connections of the system working valve 4 from left to right are respectively used to control the four actions of sugarcane straightening, sugarcane root cutting, sugarcane conveying, and stalk and leaf stripping. Each connection can realize independent proportional control and forward and reverse switching without interfering with each other. Among them, the sugarcane root cutting motor and sugarcane conveying motor corresponding to the two actions of sugarcane root cutting and stalk and leaf stripping use plunger motors with integrated reduction devices to match large torque and suitable speed. The sugarcane straightening motor, sugarcane root cutting motor, sugarcane conveying motor, and stalk and leaf stripping motor are equipped with speed sensors, pressure sensors, and controller components to intelligently adjust the output power to achieve the purpose of energy saving and emission reduction.

[0025] The travel system pump 5 has a load-sensitive function. The output flow and pressure are mainly supplied to the travel motors 8 corresponding to the left and right crawlers of the sugarcane harvester through the travel system control valve 6. The travel system control valve 6 is a proportional control multi-way valve that does not interfere with each other. Both valves can independently realize electro-hydraulic proportional action and forward and reverse switching operations. With the speed sensor, pressure sensor, inclination sensor and controller components, intelligent travel control can be realized to ensure travel speed matching and straightness. The addition of navigation and positioning algorithms in the later stage can realize automatic driving and unmanned harvesting.

[0026] A high-low speed switching valve 7 is connected between the travel motors 8 corresponding to the left and right tracks of the sugarcane harvester. The travel motor 8 uses a motor with dual speed and braking functions. When oil flows in, the motor releases the brake and starts to move. When a pressure signal is input, the motor switches to a high-speed and small-displacement mode, which is suitable for transfer work.

[0027] The travel hydraulic system also includes a load-sensitive circuit oil extraction device 9, which is connected to the travel system pump 5 and the travel system control valve 6 respectively. The load-sensitive circuit oil extraction device 9 is connected to the attachment lifting motor and the attachment pitching motor respectively through the frame motion control valve 10. In the travel system circuit, a portion of the oil is taken through the load-sensitive circuit oil extraction device 9 and supplied to the frame motion control valve 10 to control the frame motion, thereby controlling the left lift, right lift and overall pitch of the attachment installed on the frame. Because the frame adjustment is intermittent and the installation space is limited, the load-sensitive circuit oil extraction device 9 is selected. There is no energy consumption when the frame is not adjusted, and the energy-saving effect is obvious. The total power of the electro-hydraulic system is kept within the set range to prevent the engine 1 from stalling due to overpower. The load-sensitive circuit oil extraction device 9 cooperates with control components such as pressure sensors and speed sensors to realize the floating design of the cutter disc on the frame to ensure the harvesting effect.

[0028] like Figure 2As shown, the load-sensitive hydraulic circuit oil extraction device includes an oil inlet 905 and an oil outlet 906. A reversing valve 901 is provided on the oil circuit between the oil inlet 905 and the oil outlet 906, a throttling speed regulating valve 902 is provided on the oil circuit between the oil outlet 906 and the reversing valve 901, and an inlet check valve 904 is provided on the oil circuit between the oil inlet 905 and the reversing valve 901. The reversing valve 901 is a solenoid valve, and the reversing valve 901 uses a two-position two-way reversing valve. When the valve core of the two-position two-way reversing valve is in the first position, the oil is conducted to the oil outlet 906, and the throttling speed regulating valve 902 ensures that the flow rate of the oil outlet 906 is constant and is not affected by the load or the pump shaft speed; when the valve core of the two-position two-way reversing valve is in the second position, the oil circuit between the oil inlet 905 and the oil outlet 906 is cut off, and the operation of other circuits is not affected.

[0029] The on-off of the oil circuit between the oil inlet 905 and the oil outlet 906 is determined by the reversing valve 901. The valve is controlled by the switch quantity. When the power is off, it is bidirectionally locked without leakage. After the power is on, the oil entering the oil inlet 905 passes through the throttling speed regulating valve 902 to limit the oil flow rate. At the same time, the setting of the reversing valve 901 can ensure the stability of the flow input and will not cause flow fluctuations due to changes in the pressure difference.

[0030] The oil extraction device also includes a load sensitive system, which includes a signal comparison shuttle valve 903, wherein the first end of the signal comparison shuttle valve 903 is connected to the external signal oil port 908, the second end of the signal comparison shuttle valve 903 is connected to the signal output oil port 907, and the third end of the signal comparison shuttle valve 903 is connected to the oil circuit between the throttling control valve 902 and the oil outlet 906.

[0031] The oil drives the load through the oil outlet 906. The generated pressure will be compared in the signal comparison shuttle valve 903 with the pressure of other circuits input through the external signal oil port 908. The higher pressure value will be output to the load sensitive valve of the pump through the signal output oil port 907. A decrease in the limit pressure indicates that the system needs more flow, and vice versa, it indicates that the system requires a decrease in flow.

[0032] The provision of the inlet check valve 904 can ensure that after the throttling speed regulating valve 902 is opened, the pressure shock will not enter the pump outlet through the oil circuit, thereby ensuring the service life of the pump.

[0033] The load-sensitive hydraulic circuit oil extraction device compares the pressure difference between the two circuits through the signal comparison shuttle valve 903 and outputs a signal to the pump to ensure the normal operation of the system. When the two circuits are not working, the standby pressure is low, which is more energy-saving and can ensure that the system flow supply matches the demand. The pressure / flow is adjusted according to demand. A single pump can provide flow to multiple circuits. It has the advantages of low power consumption, low failure rate, and easy equipment of the oil extraction device. It is suitable for systems with small installation space or that need to be upgraded and modified without the need for additional pumps; the load-sensitive hydraulic circuit oil extraction device is provided with an inlet check valve 904 as a conduction mechanism, which can prevent oil backflow and avoid pressure shock to the pump port; the load-sensitive hydraulic circuit oil extraction device is provided with a throttling speed regulating valve 902, and the flow rate is not affected by the pressure difference, and the output flow is more stable.

[0034] The three valve groups of the system working valve 4, the travel system control valve 6, and the frame motion control valve 10, all return oil uses the valve block to integrate the return oil into the three-in-one radiator 11. The three-in-one radiator 11 is driven by the engine 1 and can provide the functions of engine 1 cooling, circulating water cooling, and hydraulic oil cooling.

[0035] The engine 1 is connected to the top tip cutting pump 12, and the top tip cutting pump 12 is connected to the tip cutting motor through the tip cutting control valve. The top tip cutting pump 12 selects a power take-off port from the engine 1, controls the tip cutting motor through the tip cutting control valve, and can realize forward and reverse rotation without interfering with other circuits.

[0036] The proportionally controlled whole-stalk sugarcane harvester electro-hydraulic system of the utility model is applied to the whole-stalk sugarcane harvester for automatic sugarcane harvesting, realizing functions that meet the needs of sugarcane harvesting working conditions, can greatly liberate labor, greatly improve sugarcane harvesting efficiency, and is not affected by windy and rainy weather, and the comprehensive cost calculation is also much better than manual harvesting; the electro-hydraulic system of the utility model has a proportional adjustment function in the main actions of the sugarcane harvester, cooperates with components such as the motor and valve group as well as the controller and sensor to realize intelligent control, realize the intelligent upgrade of the whole vehicle, improve the use efficiency of the engine 1, and reduce the waste of useless work; various auxiliary functions such as sugarcane root cutting, sugarcane transportation, stalk and leaf stripping, top cutting, sugarcane straightening, harvesting attachment height, angle adjustment, etc. greatly reduce the operating difficulty of the sugarcane harvester, and the intelligent control improves the operating comfort.

[0037] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A proportionally controlled whole-stalk sugarcane harvester electro-hydraulic system, characterized in that: It includes an engine, a system working main pump, a system working hydraulic system, and a travel hydraulic system. The system working hydraulic system includes a system working valve, a sugarcane straightening motor, a sugarcane root cutting motor, a sugarcane conveying motor, and a stalk and leaf stripping motor. The system working main pump is connected to the sugarcane straightening motor, the sugarcane root cutting motor, the sugarcane conveying motor, and the stalk and leaf stripping motor respectively through the system working valve; the travel hydraulic system includes a travel system pump and a travel motor. The travel system pump is connected to the travel motors corresponding to the left and right tracks of the sugarcane harvester through the travel system control valve.

2. The proportionally controlled whole-stalk sugarcane harvester electro-hydraulic system as claimed in claim 1, characterized in that: The travel hydraulic system further comprises a load-sensitive circuit oil extraction device, which is respectively connected to the travel system pump, the travel system control valve and the frame motion control valve.

3. The proportionally controlled whole-stalk sugarcane harvester electro-hydraulic system as claimed in claim 2, characterized in that: The engine is connected to a tip cutting pump, and the tip cutting pump is connected to a tip cutting motor through a tip cutting control valve.

4. The proportionally controlled whole-stalk sugarcane harvester electro-hydraulic system as claimed in claim 3, characterized in that: The travel system control valve is a proportional control multi-way valve.

5. The proportionally controlled whole-stalk sugarcane harvester electro-hydraulic system as claimed in claim 4, characterized in that: The oil return circuits of the system working valve, the travel system control valve and the rack motion control valve are integrated with the return oil of the valve block and enter the three-in-one radiator.

6. The proportionally controlled whole-stalk sugarcane harvester electro-hydraulic system as claimed in claim 5, characterized in that: The engine is connected to the system working main pump and the travel system pump respectively through a transfer case.

7. The proportionally controlled whole-stalk sugarcane harvester electro-hydraulic system as claimed in claim 2, characterized in that: The load-sensitive hydraulic circuit oil extraction device includes an oil inlet and an oil outlet, and a reversing valve is arranged on the oil circuit between the oil inlet and the oil outlet; a throttling speed regulating valve is arranged on the oil circuit between the oil outlet and the reversing valve; the oil extraction device also includes a load-sensitive system, and the load-sensitive system includes a signal comparison shuttle valve, and the signal comparison shuttle valve and the oil circuit between the throttling speed regulating valve and the oil outlet are connected.

8. The proportionally controlled whole-stalk sugarcane harvester electro-hydraulic system as claimed in claim 7, characterized in that: The signal comparison shuttle valve is connected to the external signal oil port and the signal output oil port respectively.

9. The proportionally controlled whole-stalk sugarcane harvester electro-hydraulic system as claimed in claim 8, characterized in that: The reversing valve is a two-position two-way reversing valve. When the valve core of the two-position two-way reversing valve is in the first position, the oil is conducted to the oil outlet; when the valve core of the two-position two-way reversing valve is in the second position, the oil path between the oil inlet and the oil outlet is cut off.

10. The proportionally controlled whole-stalk sugarcane harvester electro-hydraulic system as claimed in claim 9, characterized in that: An inlet check valve is arranged on the oil circuit between the oil inlet and the reversing valve.

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