Hydraulic system of agricultural machinery light material extractor

Abstract

The utility model discloses a hydraulic system of a light material extractor of agricultural machinery. The hydraulic system comprises an oil pump, an oil tank, a radiator, a hydraulic motor, a two-way cartridge valve, a two-position two-way electromagnetic valve, a first throttle valve and a second throttle valve, an oil inlet of the oil pump is connected with the oil tank, and an oil outlet of the oil pump is connected with an oil inlet of the two-position two-way electromagnetic valve and an oil inlet of the two-way cartridge valve. An oil outlet of the two-position two-way electromagnetic valve is respectively connected with a control cavity of the two-way cartridge valve and an oil inlet of the radiator through a first throttle valve and a second throttle valve; an oil outlet of the radiator is communicated with the oil tank, an oil outlet of the two-way cartridge valve is connected with an oil inlet of the hydraulic motor, and an oil outlet of the hydraulic motor is further connected with the radiator. According to the hydraulic system of the light material extractor of the agricultural machinery, a pilot control mode is adopted, a hydraulic loop is formed through simple hydraulic parts, loss and cost can be reduced, and working efficiency can be improved.

Description

Technical Field

[0001] This utility model relates to the field of hydraulic technology for agricultural machinery, and in particular to a hydraulic system for a lightweight material extractor for agricultural machinery. Background Technology

[0002] The flow field of a lightweight material extractor in agricultural machinery is generated by the rotation of the extractor blades, which are driven by a motor. Since the extractor blades draw air from the inside out to extract lightweight materials, the motor only needs to control one direction of rotation to meet operational requirements. Traditional lightweight material extractors in agricultural machinery therefore use only a single electromagnetic directional valve as the main oil circuit switch to control the motor's on / off state. Traditional technology uses a high-flow, high-loss electromagnetic directional valve that acts directly on the working oil circuit, significantly increasing operating costs. The electromagnetic directional valve directly controls the start and stop of the lightweight material extraction mechanism in the working oil circuit, greatly increasing the power loss of the entire system regardless of whether it is working, causing system heat generation and increased fuel consumption. Utility Model Content

[0003] To address the aforementioned problems, this utility model provides a hydraulic system for a lightweight material extractor for agricultural machinery, aiming to solve the problems of power loss, cost, and efficiency deficiencies in existing hydraulic systems.

[0004] The present invention achieves the above objectives by adopting the following technical solution:

[0005] A hydraulic system for a lightweight material extractor for agricultural machinery includes an oil pump, an oil tank, a radiator, a hydraulic motor, a two-way cartridge valve, a two-position two-way solenoid valve, a first throttle valve, and a second throttle valve. The oil pump's inlet is connected to the oil tank, and its outlet is connected to both the inlet of the two-position two-way solenoid valve and the inlet of the two-way cartridge valve. The outlet of the two-position two-way solenoid valve is connected to the control chamber of the two-way cartridge valve and the inlet of the radiator via the first and second throttle valves. The radiator outlet is connected to the oil tank, and the outlet of the two-way cartridge valve is connected to the inlet of the hydraulic motor. The hydraulic motor outlet is also connected to the radiator.

[0006] The working principle of this technology is as follows: When the two-position two-way solenoid valve is not energized, it operates in its left position. The control chamber of the two-way cartridge valve is connected to the oil outlet of the two-position two-way solenoid valve through the first throttle valve. The pressure is equal to the oil pump outlet pressure, and the valve core of the two-way cartridge valve cannot be opened. The oil discharged by the oil pump normally passes through the two-position two-way solenoid valve, then through the second throttle valve, to the radiator and back to the hydraulic oil tank. When the two-position two-way solenoid valve is energized, it operates in its right position. The pressure in the control chamber of the two-way cartridge valve connected to the first throttle valve is 0. The oil discharged by the oil pump opens the valve core of the two-way cartridge valve, and the oil inlet and outlet of the two-way cartridge valve are connected. The oil normally flows through the hydraulic motor to the radiator and then back to the hydraulic oil tank, realizing the operation of the hydraulic motor. This technical solution adopts a pilot control method, using simple hydraulic components to form a hydraulic circuit to control the operation of the hydraulic motor for the extraction of light materials. This reduces losses and costs, improves work efficiency, and the hydraulic oil passes through the radiator before returning to the oil tank.

[0007] A further technical solution includes a relief valve, wherein the inlet of the relief valve is connected to the outlet of the oil pump, and the outlet is connected to the inlet of the radiator. In this technical solution, when the two-position two-way solenoid valve is in the right position, the pressure gradually increases as the oil pump continuously supplies oil to the hydraulic motor. When the pressure suddenly reaches the set pressure of the relief valve, the relief valve operates, and the oil discharged by the oil pump can flow back to the oil tank through the relief valve and the radiator, which can further improve the safety of the hydraulic system.

[0008] A further technical solution includes a one-way valve, wherein the inlet of the one-way valve is connected between the outlet of the hydraulic motor and the inlet of the radiator, and the outlet is connected between the outlet of the two-way cartridge valve and the inlet of the hydraulic motor. In this technical solution, when the two-position two-way solenoid valve is de-energized, it resumes its left-side operation. The pressure in the control chamber of the two-way cartridge valve is equal to the pressure at the output port of the oil pump. The valve core of the two-way cartridge valve closes, and the oil pump no longer supplies oil to the hydraulic motor. Part of the oil flowing out of the hydraulic motor returns to the motor through the one-way valve, and part of the oil flows back to the oil tank through the radiator, gradually stopping the hydraulic motor from rotating.

[0009] A further technical solution is to install a filter between the oil pump inlet and the oil tank.

[0010] The beneficial effects of this utility model are:

[0011] This utility model provides a hydraulic system for a lightweight material extractor in agricultural machinery. It employs pilot control, using simple hydraulic components to form a hydraulic circuit that controls the hydraulic motor for extracting lightweight materials. This reduces losses and costs while improving work efficiency. The hydraulic oil passes through a radiator before returning to the tank. Furthermore, an overflow valve enhances the safety of the hydraulic system, and a check valve gradually stops the hydraulic motor, preventing damage from sudden stops. Attached Figure Description

[0012] Figure 1 Here is a schematic diagram of the hydraulic system of the lightweight material extractor for agricultural machinery described in this utility model.

[0013] In the picture:

[0014] 1. Oil pump; 2. Oil tank; 3. Radiator; 4. Hydraulic motor; 5. Two-way cartridge valve; 6. Two-position two-way solenoid valve; 71. First throttle valve; 72. Second throttle valve; 8. Relief valve; 9. Check valve; 10. Filter. Detailed Implementation

[0015] The following is in conjunction with the appendix Figure 1 The present invention will be described in detail below with specific embodiments. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0016] like Figure 1 As shown, this embodiment provides a hydraulic system for a lightweight material extractor for agricultural machinery. The hydraulic system controls the rotation of a hydraulic motor to generate a flow field that flushes away lightweight materials. The hydraulic system includes an oil pump 1, an oil tank 2, a radiator 3, a hydraulic motor 4, a two-way cartridge valve 5, a two-position two-way solenoid valve 6, a first throttle valve 71, and a second throttle valve 72. The oil pump 1's inlet is connected to the oil tank 2, and its outlet is connected to the inlet of the two-position two-way solenoid valve 6 and the inlet E of the two-way cartridge valve 5, respectively. The outlet of the two-position two-way solenoid valve 6 is connected to the control chamber G of the two-way cartridge valve 5 and the inlet of the radiator 3, respectively, through the first throttle valve 71 and the second throttle valve 72. The outlet of the radiator 3 is connected to the oil tank 2, and the outlet F of the two-way cartridge valve 5 is connected to the inlet of the hydraulic motor 4. The outlet of the hydraulic motor 4 is also connected to the radiator 3.

[0017] The working principle of this technology is as follows: When the two-position two-way solenoid valve 6 is not energized, it operates in its left position. The control chamber G of the two-way cartridge valve 5 is connected to the oil outlet of the two-position two-way solenoid valve 6 through the first throttle valve 71. The pressure in the control chamber G is equal to the pressure at the oil outlet of the oil pump 1, and the valve core of the two-way cartridge valve 5 cannot be opened. The oil discharged from the oil pump 1 normally passes through the two-position two-way solenoid valve 6, through the second throttle valve 72, to the radiator 3, and then flows back to the oil tank 2. When the two-position two-way solenoid valve 6 is energized, it operates in its right position. The pressure in the control chamber G of the two-way cartridge valve 5 is 0. The oil discharged from the oil pump 1 pushes open the valve core of the two-way cartridge valve 5, and the oil inlet E and outlet F of the two-way cartridge valve 5 are connected. The oil normally flows through the hydraulic motor 4 to the radiator 3 and then back to the oil tank 2, thus realizing the operation of the hydraulic motor. The hydraulic system described in this embodiment adopts a pilot control method. The hydraulic circuit is formed by the simple hydraulic components mentioned above to control the operation of the hydraulic motor 4. It can extract light materials, reduce losses and costs, and improve work efficiency. At the same time, the hydraulic oil passes through the radiator 3 before returning to the oil tank 2.

[0018] In another embodiment, based on the above embodiment, to improve the safety of the hydraulic system, a relief valve 8 is also included. The inlet of the relief valve 8 is connected to the outlet of the oil pump 1, and the outlet is connected to the inlet of the radiator 3. During operation, when the two-position two-way solenoid valve 6 is in the right position, the oil pump 1 continuously supplies oil to the hydraulic motor 4, and the pressure gradually increases. When the pressure suddenly reaches the set pressure of the relief valve 6, the relief valve 6 is activated, and the oil discharged by the oil pump 1 can flow back to the oil tank 2 through the relief valve 6 and the radiator 3, further improving the safety of the hydraulic system.

[0019] In another embodiment, based on the above embodiment, to avoid damage to the hydraulic motor from sudden high-speed rotation to complete shutdown, the hydraulic system further includes a one-way valve 9. The inlet of the one-way valve 9 is connected between the outlet of the hydraulic motor 4 and the inlet of the radiator 3, and the outlet is connected between the outlet F of the two-way cartridge valve 5 and the inlet of the hydraulic motor 4. During operation, when the two-position two-way solenoid valve 6 is de-energized, it resumes its left-side operation. The pressure in the control chamber G of the two-way cartridge valve 5 is equal to the pressure at the outlet of the oil pump 1, and the valve core of the two-way cartridge valve 5 closes. The oil pump 1 no longer supplies oil to the hydraulic motor 4. Part of the oil flowing out of the hydraulic motor 4 returns to the hydraulic motor 4 through the one-way valve 9, and part of the oil flows back to the oil tank 2 through the radiator 3, gradually stopping the hydraulic motor from rotating.

[0020] In another embodiment, based on the above embodiment, in order to improve the cleanliness of the hydraulic oil, a filter 10 is also provided between the oil inlet of the oil pump 1 and the oil tank 2.

[0021] This utility model provides a hydraulic system for a lightweight material extractor in agricultural machinery. It employs pilot control, using simple hydraulic components to form a hydraulic circuit that controls the hydraulic motor 4 to extract lightweight materials. This reduces losses and costs while improving work efficiency. The hydraulic oil passes through a radiator 3 before returning to the oil tank 2. Furthermore, an overflow valve 8 enhances the safety of the hydraulic system, and a check valve 9 gradually stops the hydraulic motor 4, preventing damage from sudden stops.

Claims

1. A hydraulic system for a lightweight material extractor in agricultural machinery, characterized in that, Includes oil pump, oil tank, radiator, hydraulic motor, two-way cartridge valve, two-position two-way solenoid valve, first throttle valve, and second throttle valve; The oil pump's inlet is connected to the oil tank, and its outlet is connected to the inlet of the two-position two-way solenoid valve and the inlet of the two-way cartridge valve, respectively. The outlet of the two-position two-way solenoid valve is connected to the control chamber of the two-way cartridge valve and the inlet of the radiator through the first throttle valve and the second throttle valve, respectively. The radiator outlet is connected to the oil tank, and the outlet of the two-way cartridge valve is connected to the inlet of the hydraulic motor. The outlet of the hydraulic motor is also connected to the radiator.

2. The hydraulic system for a lightweight material extractor for agricultural machinery according to claim 1, characterized in that, It also includes an overflow valve, the oil inlet of which is connected to the oil pump outlet and the oil outlet of which is connected to the radiator inlet.

3. The hydraulic system for a lightweight material extractor for agricultural machinery according to claim 1, characterized in that, It also includes a one-way valve, wherein the oil inlet of the one-way valve is connected between the oil outlet of the hydraulic motor and the oil inlet of the radiator, and the oil outlet is connected between the oil outlet of the two-way cartridge valve and the oil inlet of the hydraulic motor.

4. The hydraulic system for a lightweight material extractor for agricultural machinery according to claim 1, characterized in that, A filter is also installed between the oil pump inlet and the oil tank.

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