A confluence hydraulic system, a control method, and a tractor

Abstract

This invention provides a confluence hydraulic system, a control method, and a tractor. The confluence hydraulic system includes: a multi-way valve system, a lifting system, a lifting pump, a confluence pump, a flow divider valve, an oil tank, and a confluence check valve. The first end of the multi-way valve system is connected to one end of the lifting system via a pipeline. One end of the lifting pump is connected to the other end of the lifting system via a pipeline. One end of the confluence pump is connected to the first end of the flow divider valve and one end of the confluence check valve via pipelines. The other ends of both the lifting pump and the confluence pump are connected to the oil tank via pipelines. The other end of the confluence check valve is connected to the pipeline between the multi-way valve system and the lifting system via a pipeline. The second end of the multi-way valve system is connected to the second end of the flow divider valve. The third end of the multi-way valve system is connected to the oil tank via a pipeline. The third end of the flow divider valve is connected to one end of the confluence pump. The fourth end of the flow divider valve is connected to the pipeline between the multi-way valve system and the oil tank via a pipeline.

Description

Technical Field

[0001] This invention relates to the field of vehicle hydraulic system technology, and more particularly to a confluence hydraulic system, a control method, and a tractor. Background Technology

[0002] The existing tractor's fixed displacement hydraulic system mainly consists of two fixed displacement pumps that drive the steering system (including the cooling and lubrication systems) and the lifting system (including the multi-way valve system) respectively. The problems are as follows:

[0003] 1. The flow rates of the booster system and the multi-way valve system can only be the same, which does not meet actual needs, such as when the flow rate of the multi-way valve system is much greater than that of the booster system; 2. The booster system and the multi-way valve system are connected in series and cannot work simultaneously. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to address the shortcomings of the prior art by providing a confluence hydraulic system, a control method, and a tractor.

[0005] The technical solution of the present invention to solve the above-mentioned technical problems is as follows: A confluence hydraulic system, comprising: a multi-way valve system, a lifting system, a lifting pump, a confluence pump, a diverter valve, an oil tank, and a confluence check valve. The first end of the multi-way valve system is connected to one end of the lifting system via a pipeline. One end of the lifting pump is connected to the other end of the lifting system via a pipeline. One end of the confluence pump is connected to the first end of the diverter valve and one end of the confluence check valve via pipelines. The other ends of the lifting pump and the confluence pump are both connected to the oil tank via pipelines. The other end of the confluence check valve is connected to the pipeline between the multi-way valve system and the lifting system via a pipeline. The second end of the multi-way valve system is connected to the second end of the diverter valve. The third end of the multi-way valve system is connected to the oil tank via a pipeline. The third end of the diverter valve is connected to one end of the confluence pump. The fourth end of the diverter valve is connected to the pipeline between the multi-way valve system and the oil tank via a pipeline.

[0006] The beneficial effects of adopting the technical solution of this invention are as follows: When the confluence pump is installed and the multi-way valve system is working, the load is fed back to the diverter valve, increasing the working pressure of the confluence pump. This allows the oil supplied by the confluence pump to enter the multi-way valve system after passing through the confluence check valve, increasing the oil supply flow of the multi-way valve system. The diverter valve ensures that when the multi-way valve system is not working, the low-pressure oil supplied by the confluence pump flows back to the oil tank quickly through the diverter valve, reducing pressure loss and energy consumption. Furthermore, it allows the lifting system and the multi-way valve system to be connected in series, enabling them to work simultaneously and meeting the actual needs of the multi-way valve system, which is significantly larger than the lifting system.

[0007] Furthermore, the fourth end of the flow divider valve is connected to a steering system, a clutch control system, a cooling system, and a lubrication system. One end of the lubrication system is connected to the oil tank via a pipeline, and the other end of the lubrication system is connected to the cooling system via a pipeline. The cooling system is connected to the clutch control system via a pipeline, and the clutch control system is connected to one end of the steering system via a pipeline. The fourth end of the flow divider valve is connected to the pipeline between the clutch control system and the cooling system via a pipeline.

[0008] The beneficial effects of adopting the above-mentioned further technical solutions are that the settings of the steering system, clutch control system, heat dissipation system and lubrication system facilitate the realization of multiple functions of the confluence hydraulic system.

[0009] Furthermore, the other end of the steering system is connected to a steering pump via a pipeline, and the steering pump is connected to the oil tank via a pipeline.

[0010] The beneficial effect of adopting the above-mentioned further technical solution is that the steering pump is used to provide steering system pressure oil, which, after being cooled, provides lubricating oil to the transmission system.

[0011] Furthermore, an oil temperature control valve is provided on the pipeline between the multi-way valve system and the oil tank, and the oil temperature control valve is equipped with an oil temperature sensor.

[0012] The beneficial effects of adopting the above-mentioned further technical solution are as follows: An oil temperature control valve with a temperature sensor is installed. The valve's opening is controlled based on the oil temperature, thereby controlling the flow rate into the cooling system. This allows for rapid increases in oil temperature during operation in areas with low temperatures. Furthermore, when the confluence pump and booster pump are operating at high power simultaneously, the cooling flow rate can be increased, ensuring the oil temperature remains within the normal operating range.

[0013] Furthermore, the booster pump is connected to the confluence pump.

[0014] The beneficial effect of adopting the above-mentioned further technical solution is that the booster pump and the combined pump are connected to form a double pump, which simplifies the structure.

[0015] In addition, the present invention also provides a tractor including a confluence hydraulic system as described in any one of the above claims.

[0016] The beneficial effects of adopting the technical solution of this invention are as follows: When the confluence pump is installed and the multi-way valve system is working, the load is fed back to the diverter valve, increasing the working pressure of the confluence pump. This allows the oil supplied by the confluence pump to enter the multi-way valve system after passing through the confluence check valve, increasing the oil supply flow of the multi-way valve system. The diverter valve ensures that when the multi-way valve system is not working, the low-pressure oil supplied by the confluence pump flows back to the oil tank quickly through the diverter valve, reducing pressure loss and energy consumption. Furthermore, it allows the lifting system and the multi-way valve system to be connected in series, enabling them to work simultaneously and meeting the actual needs of the multi-way valve system, which is significantly larger than the lifting system.

[0017] In addition, the present invention also provides a control method for a confluence hydraulic system, based on any one of the confluence hydraulic systems described above, the control method for the confluence hydraulic system includes:

[0018] When the lifting system is in operation, the lifting pump delivers oil from the tank to the lifting system;

[0019] In both the multi-way valve system and the lift system, when the diverter valve is opened, the lift pump delivers oil from the tank to the multi-way valve system via the lift system, while the merging pump delivers oil from the tank to the multi-way valve system via the merging check valve.

[0020] The beneficial effects of adopting the technical solution of this invention are as follows: When the confluence pump is installed and the multi-way valve system is working, the load is fed back to the diverter valve, increasing the working pressure of the confluence pump. This allows the oil supplied by the confluence pump to enter the multi-way valve system after passing through the confluence check valve, increasing the oil supply flow of the multi-way valve system. The diverter valve ensures that when the multi-way valve system is not working, the low-pressure oil supplied by the confluence pump flows back to the oil tank quickly through the diverter valve, reducing pressure loss and energy consumption. Furthermore, it allows the lifting system and the multi-way valve system to be connected in series, enabling them to work simultaneously and meeting the actual needs of the multi-way valve system, which is significantly larger than the lifting system.

[0021] Furthermore, it also includes: in standby mode, the oil in the tank flows back to the tank via the confluence pump and the diversion valve.

[0022] The beneficial effects of adopting the above-mentioned further technical solution are: setting up a diversion valve can ensure that when the multi-way valve system is not working, the low-pressure oil supplied by the confluence pump flows back to the oil tank quickly through the diversion valve, reducing pressure loss and energy consumption. In addition, it enables the lifting system and the multi-way valve system to be connected in series, so that the lifting system and the multi-way valve system can work simultaneously, meeting the actual needs of the multi-way valve system which are much larger than those of the lifting system.

[0023] Furthermore, it also includes: under normal conditions, part of the oil output from the multi-way valve system and / or diverter valve returns to the oil tank through the oil temperature control valve, and the other part returns to the oil tank through the cooling system;

[0024] Under high temperature conditions, the oil temperature control valve is closed, and the oil output from the multi-way valve system and / or diverter valve is returned to the oil tank through the cooling system.

[0025] The beneficial effects of adopting the above-mentioned further technical solution are as follows: An oil temperature control valve with a temperature sensor is installed. The valve's opening is controlled based on the oil temperature, thereby controlling the flow rate into the cooling system. This allows for rapid increases in oil temperature during operation in areas with low temperatures. Furthermore, when the confluence pump and booster pump are operating at high power simultaneously, the cooling flow rate can be increased, ensuring the oil temperature remains within the normal operating range.

[0026] The advantages of additional aspects of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the structure of a confluence hydraulic system provided in an embodiment of the present invention.

[0028] Figure 2 This is a schematic block diagram of a merging hydraulic control method provided in an embodiment of the present invention.

[0029] Figure 3 This is one of the tooling state diagrams of a confluence hydraulic system provided in an embodiment of the present invention.

[0030] Figure 4 This is the second schematic diagram of the tooling state of the merging hydraulic system provided in the embodiment of the present invention.

[0031] Figure 5 The third schematic diagram of the tooling state of the merging hydraulic system provided in the embodiment of the present invention.

[0032] Figure 6 The fourth schematic diagram of the tooling state of the merging hydraulic system provided in the embodiment of the present invention.

[0033] Figure 7 The fifth schematic diagram of the tooling state of the merging hydraulic system provided in the embodiments of the present invention.

[0034] The following are the reference numerals: 1. Multi-way valve system; 2. Lifting system; 3. Lifting pump; 4. Merging pump; 5. Dividing valve; 6. Oil tank; 7. Merging check valve; 8. Steering system; 9. Clutch control system; 10. Cooling system; 11. Lubrication system; 12. Steering pump; 13. Oil temperature control valve. Detailed Implementation

[0035] The principles and features of the present invention are described below with reference to the accompanying drawings. The examples given are only for explaining the present invention and are not intended to limit the scope of the present invention.

[0036] like Figure 1 As shown, this embodiment of the invention provides a confluence hydraulic system, including: a multi-way valve system 1, a lifting system 2, a lifting pump 3, a confluence pump 4, a diverter valve 5, an oil tank 6, and a confluence check valve 7. The first end of the multi-way valve system 1 is connected to one end of the lifting system 2 via a pipeline. One end of the lifting pump 3 is connected to the other end of the lifting system 2 via a pipeline. One end of the confluence pump 4 is connected to both the first end of the diverter valve 5 and one end of the confluence check valve 7 via pipelines. The other end of the lifting pump 3 and... The other end of each of the confluence pumps 4 is connected to the oil tank 6 via a pipeline. The other end of the confluence check valve 7 is connected to the pipeline between the multi-way valve system 1 and the lifting system 2 via a pipeline. The second end of the multi-way valve system 1 is connected to the second end of the diverter valve 5. The third end of the multi-way valve system 1 is connected to the oil tank 6 via a pipeline. The third end of the diverter valve 5 is connected to one end of the confluence pump 4. The fourth end of the diverter valve 5 is connected to the pipeline between the multi-way valve system 1 and the oil tank 6 via a pipeline.

[0037] The beneficial effects of adopting the technical solution of this invention are as follows: When the confluence pump is installed and the multi-way valve system is working, the load is fed back to the diverter valve, increasing the working pressure of the confluence pump. This allows the oil supplied by the confluence pump to enter the multi-way valve system after passing through the confluence check valve, increasing the oil supply flow of the multi-way valve system. The diverter valve ensures that when the multi-way valve system is not working, the low-pressure oil supplied by the confluence pump flows back to the oil tank quickly through the diverter valve, reducing pressure loss and energy consumption. Furthermore, it allows the lifting system and the multi-way valve system to be connected in series, enabling them to work simultaneously and meeting the actual needs of the multi-way valve system, which is significantly larger than the lifting system.

[0038] The booster system and the multi-way valve system can work simultaneously, but when they work together, the output flow of the multi-way valve system is relatively small.

[0039] It should be noted that the multi-way valve system, lifting system, lifting pump, confluence pump, flow divider valve, steering system, clutch control system, cooling system, lubrication system, steering pump, and oil temperature control valve can all be connected to the vehicle controller. The control method by which the vehicle controller controls the multi-way valve system, lifting system, lifting pump, confluence pump, flow divider valve, steering system, clutch control system, cooling system, lubrication system, steering pump, and oil temperature control valve to perform related operations is existing technology and will not be described in detail here.

[0040] Furthermore, the fourth end of the flow divider valve 5 is connected to the steering system 8, the clutch control system 9, the cooling system 10, and the lubrication system 11. One end of the lubrication system 11 is connected to the oil tank 6 via a pipeline, and the other end of the lubrication system 11 is connected to the cooling system 10 via a pipeline. The cooling system 10 is connected to the clutch control system 9 via a pipeline, and the clutch control system 9 is connected to one end of the steering system 8 via a pipeline. The fourth end of the flow divider valve 5 is connected to the pipeline between the clutch control system 9 and the cooling system 10 via a pipeline.

[0041] The beneficial effects of adopting the above-mentioned further technical solutions are that the settings of the steering system, clutch control system, heat dissipation system and lubrication system facilitate the realization of multiple functions of the confluence hydraulic system.

[0042] Furthermore, the other end of the steering system 8 is connected to a steering pump 12 via a pipeline, and the steering pump 12 is connected to the oil tank 6 via a pipeline.

[0043] The beneficial effect of adopting the above-mentioned further technical solution is that the steering pump is used to provide steering system pressure oil, which, after being cooled, provides lubricating oil to the transmission system.

[0044] Furthermore, an oil temperature control valve 13 is provided on the pipeline between the multi-way valve system 1 and the oil tank 6, and the oil temperature control valve 13 is provided with an oil temperature sensing element.

[0045] The beneficial effects of adopting the above-mentioned further technical solution are as follows: An oil temperature control valve with a temperature sensor is installed. The valve's opening is controlled based on the oil temperature, thereby controlling the flow rate into the cooling system. This allows for rapid increases in oil temperature during operation in areas with low temperatures. Furthermore, when the confluence pump and booster pump are operating at high power simultaneously, the cooling flow rate can be increased, ensuring the oil temperature remains within the normal operating range.

[0046] Furthermore, the booster pump 3 is connected to the confluence pump 4.

[0047] The beneficial effect of adopting the above-mentioned further technical solution is that the booster pump and the combined pump are connected to form a double pump, which simplifies the structure.

[0048] The connection between the booster pump, the confluence pump, and the diverter pump can be a triple pump, a double pump plus a single pump, or three single pumps.

[0049] In addition, the present invention also provides a tractor including a confluence hydraulic system as described in any one of the above claims.

[0050] The beneficial effects of adopting the technical solution of this invention are as follows: When the confluence pump is installed and the multi-way valve system is working, the load is fed back to the diverter valve, increasing the working pressure of the confluence pump. This allows the oil supplied by the confluence pump to enter the multi-way valve system after passing through the confluence check valve, increasing the oil supply flow of the multi-way valve system. The diverter valve ensures that when the multi-way valve system is not working, the low-pressure oil supplied by the confluence pump flows back to the oil tank quickly through the diverter valve, reducing pressure loss and energy consumption. Furthermore, it allows the lifting system and the multi-way valve system to be connected in series, enabling them to work simultaneously and meeting the actual needs of the multi-way valve system, which is significantly larger than the lifting system.

[0051] like Figure 2 As shown, the present invention also provides a control method for a confluence hydraulic system. Based on any one of the above-described confluence hydraulic systems, the control method for the confluence hydraulic system includes:

[0052] When the lifting system is in operation, the lifting pump delivers oil from the tank to the lifting system;

[0053] In both the multi-way valve system and the lift system, when the diverter valve is opened, the lift pump delivers oil from the tank to the multi-way valve system via the lift system, while the merging pump delivers oil from the tank to the multi-way valve system via the merging check valve.

[0054] The beneficial effects of adopting the technical solution of this invention are as follows: When the confluence pump is installed and the multi-way valve system is working, the load is fed back to the diverter valve, increasing the working pressure of the confluence pump. This allows the oil supplied by the confluence pump to enter the multi-way valve system after passing through the confluence check valve, increasing the oil supply flow of the multi-way valve system. The diverter valve ensures that when the multi-way valve system is not working, the low-pressure oil supplied by the confluence pump flows back to the oil tank quickly through the diverter valve, reducing pressure loss and energy consumption. Furthermore, it allows the lifting system and the multi-way valve system to be connected in series, enabling them to work simultaneously and meeting the actual needs of the multi-way valve system, which is significantly larger than the lifting system.

[0055] Figures 3 to 7 The arrows in the diagram represent the direction and trajectory of oil flow. Figure 3 The standby mode (state) of the confluence hydraulic system is shown. Figure 4 The lifting mode (state) of the confluence hydraulic system is shown. Figure 5 The diagram shows the multi-way valve mode / lifting mode + multi-way valve mode (state) of the confluence hydraulic system. Figure 6 The normal operating mode (state) of the oil temperature control valve in a confluence hydraulic system is shown. Figure 7 The high-temperature mode (state) of the confluence hydraulic system is shown.

[0056] Furthermore, it also includes: in standby mode, the oil in the tank flows back to the tank via the confluence pump and the diversion valve.

[0057] The beneficial effects of adopting the above-mentioned further technical solution are: setting up a diversion valve can ensure that when the multi-way valve system is not working, the low-pressure oil supplied by the confluence pump flows back to the oil tank quickly through the diversion valve, reducing pressure loss and energy consumption. In addition, it enables the lifting system and the multi-way valve system to be connected in series, so that the lifting system and the multi-way valve system can work simultaneously, meeting the actual needs of the multi-way valve system which are much larger than those of the lifting system.

[0058] Furthermore, it also includes: under normal conditions, part of the oil output from the multi-way valve system and / or diverter valve returns to the oil tank through the oil temperature control valve, and the other part returns to the oil tank through the cooling system;

[0059] Under high temperature conditions, the oil temperature control valve is closed, and the oil output from the multi-way valve system and / or diverter valve is returned to the oil tank through the cooling system.

[0060] The beneficial effects of adopting the above-mentioned further technical solution are as follows: An oil temperature control valve with a temperature sensor is installed. The valve's opening is controlled based on the oil temperature, thereby controlling the flow rate into the cooling system. This allows for rapid increases in oil temperature during operation in areas with low temperatures. Furthermore, when the confluence pump and booster pump are operating at high power simultaneously, the cooling flow rate can be increased, ensuring the oil temperature remains within the normal operating range.

[0061] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A confluence-type hydraulic system, characterized in that, include: The system comprises a multi-way valve system, a lifting system, a lifting pump, a confluence pump, a diverter valve, an oil tank, and a confluence check valve. The first end of the multi-way valve system is connected to one end of the lifting system via a pipeline. One end of the lifting pump is connected to the other end of the lifting system via a pipeline. One end of the confluence pump is connected to both the first end of the diverter valve and one end of the confluence check valve via pipelines. The other ends of both the lifting pump and the confluence pump are connected to the oil tank via pipelines. The other end of the confluence check valve is connected to the pipeline between the multi-way valve system and the lifting system. The first end of the multi-way valve system... The two ends are connected to one control end of the diverter valve, which can close the diverter valve under the action of oil pressure and spring. The third end of the multi-way valve system is connected to the oil tank through a pipeline. The other control end of the diverter valve is connected to one end of the confluence pump, which can open the diverter valve under the action of oil pressure. The fourth end of the diverter valve is connected to the pipeline between the multi-way valve system and the oil tank through a pipeline. When the multi-way valve system is working, the load is fed back to the diverter valve, so that the oil supplied by the confluence pump enters the multi-way valve system after passing through the confluence check valve. When the multi-way valve system is not working, the low-pressure oil supplied by the confluence pump flows back to the oil tank quickly through the diverter valve.

2. The confluence-type hydraulic system according to claim 1, characterized in that, The fourth end of the flow divider valve is connected to the steering system, the clutch control system, the cooling system, and the lubrication system. One end of the lubrication system is connected to the oil tank via a pipeline, and the other end of the lubrication system is connected to the cooling system via a pipeline. The cooling system is connected to the clutch control system via a pipeline, and the clutch control system is connected to one end of the steering system via a pipeline. The fourth end of the flow divider valve is connected to the pipeline between the clutch control system and the cooling system via a pipeline.

3. A confluence-type hydraulic system according to claim 2, characterized in that, The other end of the steering system is connected to a steering pump via a pipeline, and the steering pump is connected to the fuel tank via a pipeline.

4. A confluence-type hydraulic system according to claim 1, characterized in that, An oil temperature control valve is installed on the pipeline between the multi-way valve system and the oil tank, and the oil temperature control valve is equipped with an oil temperature sensor.

5. A confluence-type hydraulic system according to claim 1, characterized in that, The booster pump is connected to the confluence pump.

6. A tractor, characterized in that, The system includes a confluence hydraulic system as described in any one of claims 1 to 5.

7. A control method for a confluence-type hydraulic system, characterized in that, Based on any one of claims 1 to 5, the control method for the confluence hydraulic system includes: When the lifting system is in operation, the lifting pump delivers oil from the tank to the lifting system; In both the multi-way valve system and the lift system, when the diverter valve is opened, the lift pump delivers oil from the tank to the multi-way valve system via the lift system, while the merging pump delivers oil from the tank to the multi-way valve system via the merging check valve.

8. The control method for a confluence-type hydraulic system according to claim 7, characterized in that, Also includes: In standby mode, the oil in the tank flows back to the tank via the confluence pump and the diversion valve.

9. A control method for a confluence-type hydraulic system according to claim 7, characterized in that, Also includes: Under normal conditions, part of the oil output from the multi-way valve system and / or diverter valve returns to the oil tank through the oil temperature control valve, and the other part returns to the oil tank through the cooling system. Under high temperature conditions, the oil temperature control valve is closed, and the oil output from the multi-way valve system and / or diverter valve is returned to the oil tank through the cooling system.

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