Tractor hydraulic system with double pumps

Abstract

The utility model relates to a tractor hydraulic system with double pumps, and belongs to the field of tractors. Comprising a first main pump, a second main pump, an oil tank, an agricultural implement and tractor hydraulic equipment, the first main pump and the second main pump are both connected with the oil tank and the tractor hydraulic equipment, and the agricultural implement is connected with the tractor hydraulic equipment. The utility model is favorable for solving the problems of insufficient hydraulic flow and poor output flow stability of the existing tractor hydraulic system, so as to meet the requirements of diversified agricultural implements on the tractor hydraulic system.

Description

Technical Field

[0001] The utility model relates to the field of tractors, in particular to a tractor hydraulic system with a double-pump configuration. Background Art

[0002] As tractors adapt to a growing variety of agricultural implements, their hydraulic systems are becoming increasingly complex, placing increasing demands on them. For example, a planter's blower motor requires very high hydraulic system flow stability. However, for safety reasons, traditional single-pump tractors, while maintaining steering and braking functions, often experience hydraulic flow fluctuations, leading to seed blocking when used with planters requiring high flow stability. In other words, existing tractor hydraulic systems suffer from insufficient hydraulic flow and poor output flow stability. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide a tractor hydraulic system with a dual-pump configuration, so as to solve the problems of insufficient hydraulic flow and poor output flow stability in the existing tractor hydraulic systems, and to meet the requirements of various agricultural machinery for tractor hydraulic systems.

[0004] The utility model provides a technical solution for solving the above-mentioned technical problems as follows: a tractor hydraulic system with a dual-pump configuration, comprising: a first main pump, a second main pump, a fuel tank, agricultural machinery and tractor hydraulic equipment; the first main pump and the second main pump are both connected to the fuel tank and the tractor hydraulic equipment, and the agricultural machinery is connected to the tractor hydraulic equipment.

[0005] The beneficial effects of the present invention are as follows: in a tractor with a dual-pump configuration, the first main pump and the second main pump are both connected to the fuel tank and the tractor hydraulic equipment, which is beneficial for the first main pump and the second main pump to each have their own control unit. The flows in the control unit of the first main pump and the control unit of the second main pump do not need to be merged, which not only doubles the available flow of the tractor hydraulic system, but also the control unit of the second main pump is not affected by any compound action in the control unit of the first main pump, and the flow stability is very high. At the same time, agricultural machinery with different flow stability requirements can be connected to the control unit of the second main pump and / or the control unit of the first main pump according to the flow requirements of the agricultural machinery. Compared with the existing tractors with a single pump configuration, the tractors with a dual-pump configuration can adapt to more diverse agricultural machinery.

[0006] On the basis of the above technical solution, the present invention can also be improved as follows.

[0007] Furthermore, the tractor hydraulic equipment includes: a steering valve, a first multi-way valve, a lifting valve, a brake valve and a priority valve; the first main pump and the oil tank are both connected to the steering valve, the first multi-way valve, the lifting valve and the brake valve, the first main pump is connected to the priority valve, and the steering valve, the first multi-way valve and the lifting valve are all connected to the priority valve.

[0008] The beneficial effect of adopting the above further solution is that the priority valve is conducive to prioritizing the supply of hydraulic oil to the steering valve among the steering valve, the first multi-way valve and the lifting valve, ensuring the reliability of the tractor's steering during driving, thereby improving the safety of the tractor during driving.

[0009] Furthermore, the first main pump and the oil tank, the first main pump and the priority valve, the first main pump and the brake valve, the priority valve and the steering valve, the priority valve and the first multi-way valve, and the priority valve and the lift valve are all connected through an oil inlet pipeline.

[0010] The beneficial effect of adopting the above further scheme is that the first main pump is conducive to pumping the hydraulic oil in the oil tank to the steering valve, the first multi-way valve, the lifting valve, the brake valve and the priority valve through the oil inlet pipeline, thereby providing power for various hydraulic equipment in the hydraulic system.

[0011] Furthermore, the first main pump, the steering valve, the first multi-way valve, the lift valve and the brake valve are all connected to the oil tank via an oil return pipeline.

[0012] The beneficial effect of adopting the above further solution is that it is conducive to forming a hydraulic circulation loop between the first main pump, the steering valve, the first multi-way valve, the lifting valve, the brake valve and the oil tank.

[0013] Furthermore, the steering valve, the first multi-way valve, the lift valve, the brake valve and the control port of the first main pump are all connected via signal lines.

[0014] The beneficial effect of adopting the above further solution is that it is conducive to transmitting the load signals of the steering valve, the first multi-way valve, the lifting valve and the brake valve to the first main pump through the signal line, thereby realizing hydraulic feedback of the hydraulic system.

[0015] Furthermore, the tractor hydraulic equipment further includes an ultra-hydraulic output valve and a second multi-way valve, and the second main pump and the oil tank are both connected to the second multi-way valve and the ultra-hydraulic output valve.

[0016] The beneficial effect of adopting the above further scheme is that the second main pump is conducive to supplying hydraulic oil to the second multi-way valve separately, so that agricultural machinery with higher requirements for hydraulic flow and stability can be connected to the second multi-way valve or connected to the first multi-way valve and the second multi-way valve at the same time, thereby improving the working stability of the agricultural machinery.

[0017] Furthermore, the second main pump and the oil tank, the second main pump and the second multi-way valve, and the second main pump and the super-hydraulic output valve are all connected through an oil inlet pipeline.

[0018] The beneficial effect of adopting the above further solution is that the second main pump is conducive to pumping the hydraulic oil in the oil tank to the second multi-way valve and the super hydraulic output valve through the oil inlet pipeline, thereby providing power for various hydraulic devices in the hydraulic system.

[0019] Furthermore, the super hydraulic output valve and the second multi-way valve are connected to the oil tank via an oil return pipeline.

[0020] The beneficial effect of adopting the above further solution is that it is conducive to forming a hydraulic circulation loop between the second main pump, the super hydraulic output valve, the second multi-way valve and the oil tank.

[0021] Furthermore, the super hydraulic pressure output valve and the second multi-way valve are connected to the control port of the second main pump via a signal line.

[0022] The beneficial effect of adopting the above further solution is that it is conducive to transmitting the load signals of the super hydraulic output valve and the second multi-way valve to the second main pump through the signal line, thereby realizing hydraulic feedback of the hydraulic system.

[0023] Furthermore, the agricultural implement is connected to the first multi-way valve and / or the second multi-way valve.

[0024] The beneficial effect of adopting the above further solution is that it is conducive to providing hydraulic power to the agricultural machinery through the first main pump and / or the second main pump, thereby meeting the hydraulic requirements of different agricultural machinery. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 A schematic diagram of the hydraulic system connection provided in Example 1 of the present utility model;

[0026] Figure 2 A schematic diagram of the hydraulic system connection provided in the second embodiment of the present utility model;

[0027] Figure 3 This is a schematic diagram of the hydraulic system connection provided in Example 3 of the present utility model.

[0028] in, Figures 1 to 3 The solid line in the figure represents the oil inlet pipeline, the dotted line represents the oil return pipeline, and the short dash line represents the signal line.

[0029] In the accompanying drawings, the components represented by the reference numerals are as follows:

[0030] 1. First main pump; 2. Second main pump; 3. Fuel tank; 4. Agricultural machinery; 5. Tractor hydraulic equipment; 51. Steering valve; 52. First multi-way valve; 53. Lift valve; 54. Brake valve; 55. Priority valve; 56. Super hydraulic output valve; 57. Second multi-way valve. DETAILED DESCRIPTION

[0031] The principles and features of the present invention are described below. The examples given are only used to explain the present invention and are not used to limit the scope of the present invention.

[0032] like Figures 1 to 3 As shown, a tractor hydraulic system with a dual-pump configuration includes: a first main pump 1, a second main pump 2, a fuel tank 3, an agricultural implement 4 and a tractor hydraulic device 5; the first main pump 1 and the second main pump 2 are both connected to the fuel tank 3 and the tractor hydraulic device 5, and the agricultural implement 4 is connected to the tractor hydraulic device 5.

[0033] The beneficial effects of the present invention are as follows: in a tractor with a dual-pump configuration, the first main pump and the second main pump are both connected to the fuel tank and the tractor hydraulic equipment, which is beneficial for the first main pump and the second main pump to each have their own control unit. The flows in the control unit of the first main pump and the control unit of the second main pump do not need to be merged, which not only doubles the available flow of the tractor hydraulic system, but also the control unit of the second main pump is not affected by any compound action in the control unit of the first main pump, and the flow stability is very high. At the same time, agricultural machinery with different flow stability requirements can be connected to the control unit of the second main pump and / or the control unit of the first main pump according to the flow requirements of the agricultural machinery. Compared with the existing tractors with a single pump configuration, the tractors with a dual-pump configuration can adapt to more diverse agricultural machinery.

[0034] Preferably, Figures 1 to 3 As shown, the tractor hydraulic equipment 5 includes: a steering valve 51, a first multi-way valve 52, a lift valve 53, a brake valve 54 and a priority valve 55; the first main pump 1 and the oil tank 3 are connected to the steering valve 51, the first multi-way valve 52, the lift valve 53 and the brake valve 54, the first main pump 1 is connected to the priority valve 55, and the steering valve 51, the first multi-way valve 52 and the lift valve 53 are all connected to the priority valve 55.

[0035] The beneficial effect of adopting the above preferred scheme is that the priority valve is conducive to prioritizing the supply of hydraulic oil to the steering valve among the steering valve, the first multi-way valve and the lifting valve, ensuring the reliability of the tractor's steering during driving, thereby improving the safety of the tractor during driving.

[0036] Preferably, Figures 1 to 3 As shown, the first main pump 1 and the oil tank 3, the first main pump 1 and the priority valve 55, the first main pump 1 and the brake valve 54, the priority valve 55 and the steering valve 51, the priority valve 55 and the first multi-way valve 52, and the priority valve 55 and the lift valve 53 are all connected through an oil inlet pipeline.

[0037] The beneficial effect of adopting the above-mentioned preferred scheme is that the first main pump is conducive to pumping the hydraulic oil in the oil tank to the steering valve, the first multi-way valve, the lifting valve, the brake valve and the priority valve through the oil inlet pipeline, thereby providing power for various hydraulic equipment in the hydraulic system.

[0038] Preferably, Figures 1 to 3 As shown, the first main pump 1 , the steering valve 51 , the first multi-way valve 52 , the lift valve 53 , and the brake valve 54 are all connected to the oil tank 3 via an oil return pipeline.

[0039] The beneficial effect of adopting the above preferred solution is that it is conducive to forming a hydraulic circulation loop between the first main pump, the steering valve, the first multi-way valve, the lifting valve, the brake valve and the oil tank.

[0040] Preferably, Figures 1 to 3 As shown, the steering valve 51 , the first multi-way valve 52 , the lift valve 53 , and the brake valve 54 are all connected to the control port of the first main pump 1 via signal lines.

[0041] The beneficial effect of adopting the above preferred solution is that it is conducive to transmitting the load signals of the steering valve, the first multi-way valve, the lifting valve and the brake valve to the first main pump through the signal line, thereby realizing hydraulic feedback of the hydraulic system.

[0042] Preferably, Figures 1 to 3 As shown, the tractor hydraulic equipment 5 further includes an ultra-hydraulic output valve 56 and a second multi-way valve 57 , and the second main pump 2 and the oil tank 3 are both connected to the second multi-way valve 57 and the ultra-hydraulic output valve 56 .

[0043] The beneficial effect of adopting the above-mentioned preferred scheme is that the second main pump is conducive to supplying hydraulic oil to the second multi-way valve separately, thereby connecting agricultural machinery with higher requirements for hydraulic flow and stability to the second multi-way valve or connecting it to the first multi-way valve and the second multi-way valve at the same time, thereby improving the working stability of the agricultural machinery.

[0044] Preferably, Figures 1 to 3 As shown, the second main pump 2 and the oil tank 3 , the second main pump 2 and the second multi-way valve 57 , and the second main pump 2 and the super-hydraulic output valve 56 are all connected via oil inlet pipelines.

[0045] The beneficial effect of adopting the above preferred solution is that the second main pump is conducive to pumping the hydraulic oil in the oil tank to the second multi-way valve and the super hydraulic output valve through the oil inlet pipeline, thereby providing power for various hydraulic equipment in the hydraulic system.

[0046] Preferably, Figures 1 to 3 As shown, the super hydraulic output valve 56 and the second multi-way valve 57 are connected to the oil tank 3 through an oil return pipeline.

[0047] The beneficial effect of adopting the above preferred solution is that it is conducive to forming a hydraulic circulation loop between the second main pump, the super hydraulic output valve, the second multi-way valve and the oil tank.

[0048] Preferably, Figures 1 to 3 As shown, the super hydraulic pressure output valve 56 and the second multi-way valve 57 are connected to the control port of the second main pump 2 through a signal line.

[0049] The beneficial effect of adopting the above preferred solution is that it is conducive to transmitting the load signals of the super hydraulic output valve and the second multi-way valve to the second main pump through the signal line, thereby realizing hydraulic feedback of the hydraulic system.

[0050] Preferably, Figures 1 to 3 As shown, the agricultural implement 4 is connected to the first multi-way valve 52 and / or the second multi-way valve 57 .

[0051] The beneficial effect of adopting the above preferred solution is that it is conducive to providing hydraulic power to agricultural machinery through the first main pump and / or the second main pump, thereby meeting the hydraulic requirements of different agricultural machinery.

[0052] The present invention will be further described below through three embodiments:

[0053] Example 1.

[0054] like Figure 1 As shown, in this embodiment, the agricultural implement 4 is a seed drill, and the four hydraulic output groups of the seed drill are all connected to the first multi-way valve 52, that is, hydraulic pressure is supplied to the seed drill that has low requirements for hydraulic flow and hydraulic stability only through the first main pump 1.

[0055] Example 2.

[0056] like Figure 2 As shown, in this embodiment, the agricultural implement 4 is a seed drill, and the four hydraulic output groups of the seed drill are all connected to the second multi-way valve 57, that is, hydraulic pressure is supplied to the seed drill having higher requirements on hydraulic flow and hydraulic stability only through the second main pump 2.

[0057] Example 3.

[0058] like Figure 3 As shown, in this embodiment, the agricultural implement 4 is a seed drill, and the four groups of hydraulic outputs of the seed drill are respectively connected to the first multi-way valve 52 and the second multi-way valve 57, that is, the hydraulic pressure is supplied to the seed drill that has higher requirements for hydraulic flow and hydraulic stability through the first main pump 1 and the second main pump 2.

[0059] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation to the present invention.

[0060] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature specified as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of this utility model, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0061] In this utility model, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection; direct connection, or indirect connection through an intermediate medium; internal communication between two components, or interaction between two components, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0062] In the present invention, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediary. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0063] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and features of different embodiments or examples without contradiction.

[0064] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are illustrative and cannot be understood as limitations on the present invention. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A tractor hydraulic system with a dual pump configuration, characterized in that: include: A first main pump (1), a second main pump (2), a fuel tank (3), an agricultural implement (4), and a tractor hydraulic device (5); the first main pump (1) and the second main pump (2) are both connected to the fuel tank (3) and the tractor hydraulic device (5), and the agricultural implement (4) is connected to the tractor hydraulic device (5).

2. A tractor hydraulic system with a dual pump configuration according to claim 1, characterized in that: The tractor hydraulic equipment (5) comprises: a steering valve (51), a first multi-way valve (52), a lifting valve (53), a brake valve (54) and a priority valve (55); the first main pump (1) and the oil tank (3) are both connected to the steering valve (51), the first multi-way valve (52), the lifting valve (53) and the brake valve (54); the first main pump (1) is connected to the priority valve (55); and the steering valve (51), the first multi-way valve (52) and the lifting valve (53) are all connected to the priority valve (55).

3. A tractor hydraulic system with a dual pump configuration according to claim 2, characterized in that: The first main pump (1) and the oil tank (3), the first main pump (1) and the priority valve (55), the first main pump (1) and the brake valve (54), the priority valve (55) and the steering valve (51), the priority valve (55) and the first multi-way valve (52), and the priority valve (55) and the lift valve (53) are all connected via oil inlet pipelines.

4. A tractor hydraulic system with a dual pump configuration according to claim 2, characterized in that: The first main pump (1), the steering valve (51), the first multi-way valve (52), the lift valve (53), the brake valve (54) and the oil tank (3) are all connected via an oil return pipeline.

5. The tractor hydraulic system with a dual pump configuration according to claim 2, characterized in that: The steering valve (51), the first multi-way valve (52), the lift valve (53) and the brake valve (54) are all connected to the control port of the first main pump (1) via signal lines.

6. A tractor hydraulic system with a dual pump configuration according to claim 2, characterized in that: The tractor hydraulic equipment (5) further comprises an ultra-hydraulic output valve (56) and a second multi-way valve (57), and the second main pump (2) and the oil tank (3) are both connected to the second multi-way valve (57) and the ultra-hydraulic output valve (56).

7. A tractor hydraulic system with a dual pump configuration according to claim 6, characterized in that: The second main pump (2) and the oil tank (3), the second main pump (2) and the second multi-way valve (57), and the second main pump (2) and the super-hydraulic output valve (56) are all connected via oil inlet pipelines.

8. A tractor hydraulic system with a dual pump configuration according to claim 6, characterized in that: The super hydraulic output valve (56) and the second multi-way valve (57) are connected to the oil tank (3) via an oil return pipeline.

9. A tractor hydraulic system with a dual pump configuration according to claim 6, characterized in that: The super hydraulic pressure output valve (56) and the second multi-way valve (57) are connected to the control port of the second main pump (2) via a signal line.

10. The tractor hydraulic system with a dual pump configuration according to claim 6, characterized in that: The agricultural implement (4) is connected to the first multi-way valve (52) and / or the second multi-way valve (57).

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