Hydraulic system of sugarcane cutting and stacking machine

Abstract

Provided in the present application is a hydraulic system of a sugarcane cutting and stacking machine. The hydraulic system comprises a sugarcane cutting and stacking machine body, a traveling hydraulic system, a working device hydraulic system and an auxiliary device hydraulic system, wherein the sugarcane cutting and stacking machine body comprises a front conveyor, a rear conveyor, a bin, a lodging device, a cutting table, a root cutting device, a lodging-device cylinder, a bin-lifting cylinder and a bin-door opening-closing cylinder. The hydraulic system of a sugarcane cutting and stacking machine in the present application can stably and efficiently perform functions such as traveling and harvesting operations of a sugarcane machine, is mature and stable with sensitive action responses, and can efficiently implement action control and sugarcane harvesting; the front conveyor and the rear conveyor are in semi-rigid connection, without the need to additionally provide a synchronization device, and can slide relatively in the case of overload so as to prevent components from being damaged; one-key unloading of the material bin can be realized, thereby reducing operation steps and saving time, and the sugarcane cutting and stacking machine has many working components, a complex structure and complex movement; and the hydraulic system is stable and reliable, is economical and has high efficiency.

Description

Hydraulic system of a sugarcane harvester

[0001] Cross-references

[0002] This application claims priority to the Chinese patent application filed with the Patent Office of China, application number 202420313703.9, application date February 20, 2024, and application name “A Hydraulic System for a Sugarcane Harvester”, the entire contents of which are incorporated herein by reference. Technical Field

[0003] The present application relates to the field of sugarcane buncher, and in particular to a hydraulic system for a sugarcane buncher. Background Art

[0004] Sugarcane is the main economic crop used to extract sugar. After harvesting, the sugarcane must be taken to the sugar factory for extraction of sugar. After the sugarcane is taken to the sugar factory, it will be required to have a storage period. During the storage period, the sugarcane is required not to deteriorate. Among the existing whole-stalk and cut-off harvesting methods, the whole-stalk sugarcane has a complete outer layer, which is most conducive to storage.

[0005] Currently, to meet the requirements of sugar mills, sugarcane harvesting in my country is still primarily manual, primarily involving felling and loading by hand. Some manual felling and mechanical loading methods are also used. This method is labor-intensive, inefficient, and has high labor costs, resulting in reduced profits and declining sugarcane planting rates. Some sugarcane is also harvested using cutter-type harvesters. These machines cut the sugarcane into sections, resulting in numerous cuts and poor storage. Once delivered to sugar mills, the sugarcane must be quickly crushed. While these harvesters offer high efficiency and low costs, the harvested sugarcane cannot be stored for long periods of time, failing to meet the requirements of sugar mills. This is the main reason for the low mechanized sugarcane harvesting rate. Therefore, the market is currently promoting segmented harvesting, where the entire cane is harvested and piled in the field, then transported for sorting or manual processing. This method not only improves harvesting efficiency and reduces labor intensity, but also reduces sugarcane planting costs, increasing grower income and meeting the requirements of sugar mills. A sugarcane harvester and stacker is a machine that harvests and stacks sugarcane. During harvesting, the sugarcane is cut at the root and transported through a conveyor into a hopper. Once the hopper is full, the sugarcane is dumped onto the ground, forming a pile. During the harvesting process, only the dead leaves and tips of the sugarcane are removed, ensuring the outer husk remains intact, minimizing harvesting losses and facilitating storage.

[0006] Because the sugarcane harvester has many working parts and complex structure and movement, hydraulic control and drive are used to achieve different operating actions. However, the existing hydraulic system of the sugarcane harvester is unstable, not sensitive enough, has low work efficiency, and has many operating steps and complex structure and movement.

[0007] Application Contents

[0008] Purpose of application

[0009] To this end, the present application provides a sugarcane harvester and buncher hydraulic system to overcome the above problems or at least partially solve the above problems.

[0010] Solution

[0011] In order to achieve the above objectives, this application provides the following technical solutions:

[0012] The present application provides a sugarcane buncher hydraulic system, comprising a sugarcane buncher body, a travel hydraulic system, a working device hydraulic system, and an auxiliary device hydraulic system;

[0013] The sugarcane buncher body includes a front conveyor, a rear conveyor, a material box, a tilting device, a cutting platform, a root cutting device, a tilting device cylinder, a hopper lifting cylinder and a material door opening and closing cylinder;

[0014] The hydraulic system of the working device includes a dual pump, a first reversing valve group, a second reversing valve group, a third reversing valve group, a first working motor, a second working motor, a third working motor, a fourth working motor, a fifth working motor, a sixth working motor, a seventh working motor, an eighth working motor, a ninth working motor and a bypass valve. The hydraulic system of the working device is driven by the first working oil port P1 and the second working oil port P2 of the dual pump respectively. The dual pump is supplied with oil by the hydraulic oil tank. The first working oil port P1 of the dual pump controls the operation of the first working motor, the second working motor, the third working motor, the fourth working motor, the fifth working motor and the sixth working motor through the first reversing valve group. The first working motor, the third working motor, the fifth working motor and the sixth working motor are driven by the dual pump. The motor is connected in series with the second working motor, the fourth working motor, and the sixth working motor and then works in parallel. The first reversing valve group sets the maximum working pressure of the working system of the first working oil port P1 of the dual pump and controls the rotation direction of the motor. The first working motor, the second working motor, the third working motor, the fourth working motor, the fifth working motor and the sixth working motor can all realize forward and reverse rotation. The first working motor and the second working motor are installed on the cutter head of the root cutting device, the third working motor and the fourth working motor are installed on the driving wheel shaft of the front conveyor belt, and the fifth working motor and the sixth working motor are installed on the driving wheel shaft of the rear conveyor belt. A bypass valve is provided at the outlet of the first working oil port P1 of the dual pump, which is directly connected to the oil tank;

[0015] The second working oil port P2 of the dual pump controls the operation of the seventh working motor, the eighth working motor and the ninth working motor through the second reversing valve group and the third reversing valve group. The second reversing valve group sets the maximum working pressure of the second working oil port P2 working system of the dual pump and controls the rotation direction of the seventh working motor, the eighth working motor and the ninth working motor. The seventh working motor, the eighth working motor and the ninth working motor can all realize forward and reverse rotation. Among them, the seventh working motor drives the conveyor belt to rotate and assists in transporting the sugarcane to rise. The eighth working motor and the ninth working motor are connected in series to drive the supporting device at the front of the cutting platform.

[0016] As a further solution of the present application, the travel hydraulic system is driven by a hydraulic speed-changing transmission device of model 45HST, and the driving wheel drives the travel track to make the machine move forward and backward.

[0017] As a further solution of the present application, the hydraulic system of the auxiliary device includes an auxiliary pump, a manual reversing valve, an integrated valve, a sequence valve and a hydraulic cylinder. The oil of the auxiliary pump is supplied to the manual reversing valve and the integrated valve. The integrated valve controls the steering of the stacker and the machine cutting platform cylinder. The material box is used to lift the cylinder and the material door opening and closing cylinder, and their action sequence is controlled by the sequence valve. One line of hydraulic oil realizes two sets of actions: lifting and lowering the material box and opening and closing the material door.

[0018] As a further solution of the present application, the left and right parts of the front conveyor belt and the rear conveyor belt are tightly combined and have a long combined length, and synchronous transmission can be achieved by relying on the friction between them during operation. Beneficial effects

[0019] The present application provides a hydraulic system for a sugarcane harvester and buncher, which has the following beneficial effects:

[0020] The hydraulic system of the present application is composed of hydraulic components such as a working pump, HST, hydraulic control valve, and working motor, and can stably and efficiently complete functions such as sugarcane machine travel and harvesting operations.

[0021] The hydraulic system of the present application is relatively mature and stable, with sensitive action response, and can efficiently complete action control and sugarcane harvesting.

[0022] The hydraulic system of the present application adopts a semi-rigid connection for front and rear transportation, which does not require an additional synchronization device, and can slide relative to each other in the event of overload to prevent component damage.

[0023] The hydraulic system of the present application can realize one-button unloading of the material box, reduce the operation steps, and save time. The sugarcane harvester has many working parts and complex structure and movement.

[0024] The hydraulic system provided by this application is stable, reliable, economical and efficient. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] To more clearly illustrate the embodiments of this application or the technical solutions in the prior art, the following briefly introduces the drawings required for the embodiments or the description of the prior art. Obviously, the drawings described below are merely illustrative, and those skilled in the art can derive other implementation drawings based on the provided drawings without inventive effort.

[0026] The structures, proportions, sizes, etc. illustrated in this specification are only used to match the contents disclosed in the specification so as to facilitate understanding and reading by persons familiar with this technology. They are not intended to limit the conditions under which this application can be implemented, and therefore have no substantive technical significance. Any structural modifications, changes in proportions, or adjustments in sizes should still fall within the scope of the technical contents disclosed in this application without affecting the efficacy and objectives that can be achieved by this application.

[0027] FIG1 is a schematic diagram of the overall side structure of the sugarcane harvester and buncher body in this application;

[0028] FIG2 is a schematic diagram of the overall top view of the sugarcane buncher body in this application;

[0029] FIG3 is a schematic diagram of the hydraulic system of the working device and the hydraulic system of the auxiliary device in this application;

[0030] Figure 4 is a schematic diagram of the hydraulic system of the working device in this application;

[0031] FIG5 is a schematic diagram of the hydraulic system of the auxiliary device in this application;

[0032] FIG6 is a schematic diagram of the walking hydraulic system in this application.

[0033] In the figure: 1. Front conveyor; 2. Rear conveyor; 3. Material box; 4. Support and tipping device; 5. Cutting platform; 6. Root cutting device; 7. Support and tipping device cylinder; 8. Hopper lifting cylinder; 9. Material door opening and closing cylinder; 10. Duplex pump; 11. First reversing valve group; 12. Second reversing valve group; 13. Third reversing valve group; 14. First working motor; 15. Second working motor; 16. Third working motor; 17. Fourth working motor; 18. Fifth working motor; 19. Sixth working motor; 20. Seventh working motor; 21. Eighth working motor; 22. Ninth working motor; 23. Bypass valve; 24. Auxiliary pump; 25. Manual reversing valve; 26. Integrated valve; 27. Sequence valve. DETAILED DESCRIPTION

[0034] The following specific embodiments illustrate the implementation of this application. People familiar with this technology can easily understand the other advantages and functions of this application from the content disclosed in this specification. Obviously, the described embodiments are part of the embodiments of this application, but not all of them. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0035] 1-6 , a sugarcane buncher hydraulic system provided in an embodiment of the present application includes a sugarcane buncher body, a travel hydraulic system, a working device hydraulic system, and an auxiliary device hydraulic system;

[0036] The sugarcane buncher body includes a front conveyor 1, a rear conveyor 2, a material box 3, a tilting device 4, a cutting platform 5, a root cutting device 6, a tilting device cylinder 7, a hopper lifting cylinder 8 and a material door opening and closing cylinder 9. The basic structure of the existing machine is not described in detail here.

[0037] (1) The traveling hydraulic system is driven by the driving wheel of 45HST, as shown in Figures 1 and 6. The driving wheel drives the traveling crawler to make the machine move forward and backward.

[0038] (2) The hydraulic system of the working device is driven by the working oil ports P1 and P2 of the dual pump 10, and the dual pump 10 is supplied with oil from the hydraulic oil tank;

[0039] As shown in Figure 4, the first hydraulic port P1 of the dual pump 10 controls the operation of the first to sixth hydraulic motors 14, 19, through the first reversing valve assembly 11. The first, second, third, and fourth hydraulic motors 17, 18, and 19 are connected in series and then operate in parallel. The first reversing valve assembly 11 sets the maximum operating pressure of the first hydraulic port P1 system of the dual pump 10 and controls the motor's rotational direction. Each hydraulic motor can achieve forward and reverse rotation. The first and second hydraulic motors 14, 15 are mounted on the root cutterhead, the third and fourth hydraulic motors 16, 17 are mounted on the front conveyor belt drive shaft, and the fifth and sixth hydraulic motors 18, 19 are mounted on the rear conveyor belt drive shaft. The front conveyor belt 1 and rear conveyor belt 2 are tightly coupled to each other over a long distance, achieving synchronous transmission during operation through friction between them. This ensures that the third and fourth hydraulic motors 16, 17, and the fifth and sixth hydraulic motors 18, 19 rotate at the same speed. The first and second working motors 14 and 15 are connected in series with the third and fourth working motors 16, 17, and the fifth and sixth working motors 18 and 19, respectively. By utilizing the same flow rate in the series oil circuits (not considering the volumetric efficiency of the hydraulic components), their rotational speeds are also the same. The constraints of the two front and rear conveyor belts synchronize the speeds of the hydraulic motors in each component of the sugarcane harvester during root cutting and conveying. This semi-rigid connection ensures consistent rotational speeds between the cutting disc and conveyor components during normal harvesting. When excessive feed rates cause blockage in the conveyor channel, the conveyor belts can slide relative to each other, preventing damage to the conveyor components due to excessive forces. To adjust the harvesting speed during harvesting, a bypass valve 23 is installed at the outlet of the working pump P1, directly connecting it to the fuel tank. If the conveyor belt speed is too high, the bypass valve 23 can be adjusted to drain some of the hydraulic oil directly back to the tank, reducing the speed to an appropriate range. Using the bypass valve 23 to adjust the speed does not reduce the pressure in the working circuit, which could affect harvesting.

[0040] The second hydraulic port P2 of the duplex pump 10 controls the operation of the seventh, eighth, and ninth hydraulic motors 20, 21, and 22 via the second and third directional control valves 12, 13. The second directional control valve 12 sets the maximum operating pressure of the system at the second hydraulic port P2 of the duplex pump 10 and controls the rotational direction of the seventh, eighth, and ninth hydraulic motors 20, 21, and 22. Each hydraulic motor can rotate forward and reverse, with the seventh hydraulic motor 20 driving the conveyor belt, assisting in the lifting of the sugarcane. The eighth and ninth hydraulic motors 21, 22 are connected in series to drive the sugarcane lifting mechanism at the front of the header 5.

[0041] (3) Auxiliary device hydraulic system:

[0042] It is mainly composed of an auxiliary pump 24, a manual reversing valve 25, an integrated valve 26, a sequence valve 27, a hydraulic cylinder, etc. The model of the integrated valve 26 is W2.5DD-05DC-17-01C, which is provided by Jiangsu Zhenji Machinery Manufacturing Co., Ltd.

[0043] As shown in Figure 5, oil from auxiliary pump 24 supplies manual reversing valve 25 and integrated valve 26. Integrated valve 26 controls the stacker's steering and the hydraulic cylinders for the cutting platform 5. The hydraulic cylinders for lifting the feed bin 3 and opening and closing the feed gate 9 are controlled by a sequence valve 27. One hydraulic oil channel controls both lifting and lowering the feed bin 3 and opening and closing the feed gate.

[0044] The above specific implementation methods further illustrate the purpose, technical solutions and beneficial effects of this application in detail. It should be understood that the above are only specific implementation methods of this application and are not intended to limit the scope of protection of this application. Any modifications, equivalent replacements, improvements, etc. made on the basis of the technical solutions of this application should be included in the scope of protection of this application.

Claims

1. A sugarcane buncher hydraulic system, wherein: It includes the sugarcane harvester main body, travel hydraulic system, working device hydraulic system and auxiliary device hydraulic system; The sugarcane buncher body comprises a front conveyor (1), a rear conveyor (2), a material box (3), a tilting device (4), a cutting platform (5), a root cutting device (6), a tilting device oil cylinder (7), a hopper lifting oil cylinder (8) and a material door opening and closing oil cylinder (9); The working device hydraulic system comprises a dual pump (10), a first reversing valve group (11), a second reversing valve group (12), a third reversing valve group (13), a first working motor (14), a second working motor (15), a third working motor (16), a fourth working motor (17), a fifth working motor (18), a sixth working motor (19), a seventh working motor (20), an eighth working motor (21), a ninth working motor (22) and a bypass valve (23). The working device hydraulic system is driven by a first working oil port P1 and a second working oil port P2 of the dual pump (10), respectively. The dual pump (10) is supplied with oil by a hydraulic oil tank. The first working oil port P1 of the dual pump (10) controls the operation of the first working motor (14), the second working motor (15), the third working motor (16), the fourth working motor (17), the fifth working motor (18) and the sixth working motor (19) through the first reversing valve group (11). The first working motor (14), the third working motor (19) and the sixth working motor (19) are driven by the first working oil port P1 and the second working oil port P2 of the dual pump (10). 6), the fifth working motor (18) is connected in series with the second working motor (15), the fourth working motor (17), and the sixth working motor (19) and then works in parallel. The first reversing valve group (11) sets the maximum working pressure of the working system of the first working oil port P1 of the dual pump (10) and controls the rotation direction of the motor. The first working motor (14), the second working motor (15), the third working motor (16), the fourth working motor (17), the fifth working motor (18) and the sixth working motor (19) can all realize forward and reverse rotation. The first working motor (14) and the second working motor (15) are installed on the cutter head of the root cutting device (6). The third working motor (16) and the fourth working motor (17) are installed on the driving wheel shaft of the front conveyor (1) belt. The fifth working motor (18) and the sixth working motor (19) are installed on the driving wheel shaft of the rear conveyor (2) belt. A bypass valve (23) is provided at the outlet of the first working oil port P1 of the dual pump (10), which is directly connected to the oil tank. The second working oil port P2 of the dual pump (10) controls the operation of the seventh working motor (20), the eighth working motor (21) and the ninth working motor (22) through the second reversing valve group (12) and the third reversing valve group (13). The second reversing valve group (12) sets the maximum working pressure of the working system of the second working oil port P2 of the dual pump (10) and controls the rotation direction of the seventh working motor (20), the eighth working motor (21) and the ninth working motor (22). The seventh working motor (20), the eighth working motor (21) and the ninth working motor (22) can all realize forward and reverse rotation. The seventh working motor (20) drives the conveyor belt to rotate and assists in the transportation of sugarcane. The eighth working motor (21) and the ninth working motor (22) are connected in series to drive the support device (4) at the front of the cutting platform (5).

2. A sugarcane buncher hydraulic system according to claim 1, wherein: The travel hydraulic system is driven by a 45HST hydraulic speed-changing transmission device, which drives the driving wheel, and the driving wheel drives the travel crawler to move the machine forward and backward.

3. A sugarcane buncher hydraulic system according to claim 1, wherein: The auxiliary device hydraulic system comprises an auxiliary pump (24), a manual reversing valve (25), an integrated valve (26), a sequence valve (27) and a hydraulic cylinder. The oil of the auxiliary pump (24) is supplied to the manual reversing valve (25) and the integrated valve (26). The integrated valve (26) controls the steering of the stacker and the oil cylinder of the machine cutting platform (5). The material box (3) is used for lifting the oil cylinder and the material door opening and closing oil cylinder (9), and the sequence valve (27) controls the action sequence thereof. The lifting and lowering of the material box (3) and the opening and closing of the material door are realized by one line of hydraulic oil.

4. A sugarcane buncher hydraulic system according to claim 1, wherein: The left and right parts of the conveyor belt of the front conveyor (1) and the conveyor belt of the rear conveyor (2) are tightly coupled and have a long coupling length, and synchronous transmission can be achieved by relying on the friction between them during operation.

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