A fully hydraulic automatic anti-slip system

Abstract

The present application relates to a kind of full hydraulic automatic anti-slip systems, it includes the hydraulic pump, anti-slip control valve group and hydraulic motor in series in turn;The anti-slip control valve group includes first oil supply pipeline, first throttle valve, third hydraulic control two-position two-way reversing valve and second throttle valve are sequentially arranged on the first oil supply pipeline, first hydraulic control two-position two-way reversing valve is arranged in parallel at the position of the first throttle valve, fourth hydraulic control two-position two-way reversing valve is arranged in parallel at the position of the second throttle valve.The present application relates to a kind of full hydraulic automatic anti-slip systems, it can automatically cut off the oil supply circuit of corresponding hydraulic motor when the hydraulic motor appears idling slip phenomenon, effectively avoid slip phenomenon, prevent the various accidents caused by slip.

Description

Technical Field

[0001] This invention relates to a fully hydraulic automatic anti-slip system, belonging to the field of mechanical hydraulic control technology. Background Technology

[0002] For machinery driven by hydraulic motors, such as large engineering transport vehicles, wet or snowy weather can cause the friction between the tires and the ground to exceed a critical value, resulting in insufficient traction. This leads to sliding friction between the wheels and the ground, causing the wheels to spin and slip. This not only wastes energy unnecessarily but can also cause serious accidents in severe cases. Therefore, a hydraulic system with anti-slip properties is needed to prevent slippage. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide a fully hydraulic automatic anti-slip system that can automatically cut off the oil supply circuit of the corresponding hydraulic motor when the hydraulic motor is idling and slipping, effectively avoiding slippage and preventing various accidents caused by slippage.

[0004] The technical solution adopted by the present invention to solve the above problems is: a fully hydraulic automatic anti-slip system, which includes a hydraulic pump, an anti-slip control valve group and a hydraulic motor connected in series.

[0005] Optionally, the anti-slip control valve group includes a first oil supply line, on which a first throttle valve, a third hydraulically controlled two-position two-way directional valve and a second throttle valve are sequentially arranged. A first hydraulically controlled two-position two-way directional valve is arranged in parallel at the position of the first throttle valve, and a fourth hydraulically controlled two-position two-way directional valve is arranged in parallel at the position of the second throttle valve.

[0006] Optionally, the anti-slip control valve group further includes a second oil supply line, on which a fourth throttle valve, a seventh hydraulically controlled two-position two-way directional valve and a third throttle valve are sequentially arranged. An eighth hydraulically controlled two-position two-way directional valve is arranged in parallel at the position of the fourth throttle valve, and a fifth hydraulically controlled two-position two-way directional valve is arranged in parallel at the position of the third throttle valve.

[0007] Optionally, the anti-slip control valve assembly further includes a second hydraulically controlled two-position two-way directional valve, an oil tank, and a sixth hydraulically controlled two-position two-way directional valve. The pilot circuit of the first hydraulically controlled two-position two-way directional valve is located before the first throttle valve. The oil outlet of the first hydraulically controlled two-position two-way directional valve is connected to the oil inlet of the second hydraulically controlled two-position two-way directional valve and the pilot circuit of the third hydraulically controlled two-position two-way directional valve, respectively. The pilot circuit of the eighth hydraulically controlled two-position two-way directional valve is located before the fourth throttle valve. The oil outlet of the eighth hydraulically controlled two-position two-way directional valve is connected to the oil inlet of the sixth hydraulically controlled two-position two-way directional valve and the pilot circuit of the seventh hydraulically controlled two-position two-way directional valve, respectively.

[0008] Optionally, the pilot circuit of the fourth hydraulically controlled two-position two-way directional valve is located after the second throttle valve. The oil outlet of the fourth hydraulically controlled two-position two-way directional valve is connected to the oil inlet of the second hydraulically controlled two-position two-way directional valve and the pilot circuit of the third hydraulically controlled two-position two-way directional valve, respectively. The pilot circuit of the fifth hydraulically controlled two-position two-way directional valve is located after the third throttle valve. The oil outlet of the fifth hydraulically controlled two-position two-way directional valve is connected to the oil inlet of the sixth hydraulically controlled two-position two-way directional valve and the pilot circuit of the seventh hydraulically controlled two-position two-way directional valve, respectively.

[0009] Optionally, the oil outlets of both the second hydraulically controlled two-position two-way directional valve and the sixth hydraulically controlled two-position two-way directional valve are connected to the oil tank.

[0010] Optionally, the anti-slip control valve assembly further includes a shuttle valve and a hydraulically controlled two-position three-way directional valve. A third oil supply line is provided between the first oil supply line and the second oil supply line. The shuttle valve is located on the third oil supply line. One outlet of the shuttle valve is connected to the inlet of the hydraulically controlled two-position three-way directional valve, and the other outlet is connected to the pilot circuit of the hydraulically controlled two-position three-way directional valve. One outlet of the hydraulically controlled two-position three-way directional valve is connected to the pilot circuit of the second hydraulically controlled two-position two-way directional valve, and the other outlet is connected to the pilot circuit of the sixth hydraulically controlled two-position two-way directional valve.

[0011] Optionally, the two ends of the third oil supply line are respectively located after the second throttle valve and after the third throttle valve.

[0012] Optionally, there are multiple anti-slip control valve groups and hydraulic motors, with each anti-slip control valve group and hydraulic motor corresponding to the other.

[0013] Compared with the prior art, the advantages of the present invention are as follows:

[0014] This invention discloses a fully hydraulic automatic anti-slip system, which forms an anti-slip control valve group by connecting a hydraulically controlled two-position two-way directional valve, a hydraulically controlled two-position three-way directional valve, a throttle valve, and a shuttle valve in series and parallel. When the hydraulic motor experiences idling and slippage, it can automatically cut off the oil supply circuit of the corresponding hydraulic motor, effectively avoiding slippage and preventing various accidents caused by slippage. Attached Figure Description

[0015] Figure 1 This is a hydraulic schematic diagram of a fully hydraulic automatic anti-slip system according to the present invention.

[0016] Figure 2 for Figure 1 Hydraulic schematic diagram of the anti-slip control valve assembly.

[0017] in:

[0018] 1. Hydraulic pump; 2. Anti-slip control valve assembly; 3. Hydraulic motor; 4. First throttle valve; 5. First hydraulically controlled 2-position 2-way directional valve; 6. Second hydraulically controlled 2-position 2-way directional valve; 7. Oil tank; 8. Third hydraulically controlled 2-position 2-way directional valve; 9. Fourth hydraulically controlled 2-position 2-way directional valve; 10. Second throttle valve; 11. Shuttle valve; 12. Hydraulically controlled 2-position 3-way directional valve; 13. Third throttle valve; 14. Fifth hydraulically controlled 2-position 2-way directional valve; 15. Sixth hydraulically controlled 2-position 2-way directional valve; 16. Seventh hydraulically controlled 2-position 2-way directional valve; 17. Eighth hydraulically controlled 2-position 2-way directional valve; 18. Fourth throttle valve; 19. First oil supply line; 20. Second oil supply line; 21. Third oil supply line. Detailed Implementation

[0019] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0020] join Figure 1 , Figure 2 The present invention relates to a fully hydraulic automatic anti-slip system, which includes a hydraulic pump 1, an anti-slip control valve group 2 and a hydraulic motor 3 connected in series.

[0021] The anti-slip control valve group 2 includes a first oil supply line 19, on which a first throttle valve 4, a third hydraulically controlled two-position two-way reversing valve 8 and a second throttle valve 10 are sequentially arranged. A first hydraulically controlled two-position two-way reversing valve 5 is arranged in parallel at the position of the first throttle valve 4, and a fourth hydraulically controlled two-position two-way reversing valve 9 is arranged in parallel at the position of the second throttle valve 10.

[0022] The anti-slip control valve group 2 also includes a second oil supply line 20, on which a fourth throttle valve 18, a seventh hydraulically controlled two-position two-way directional valve 16 and a third throttle valve 13 are sequentially arranged. An eighth hydraulically controlled two-position two-way directional valve 17 is arranged in parallel at the position of the fourth throttle valve 18, and a fifth hydraulically controlled two-position two-way directional valve 14 is arranged in parallel at the position of the third throttle valve 13.

[0023] The anti-slip control valve group 2 further includes a second hydraulically controlled two-position two-way directional valve 6, an oil tank 7, and a sixth hydraulically controlled two-position two-way directional valve 15. The pilot circuit of the first hydraulically controlled two-position two-way directional valve 5 is located before the first throttle valve 4. The oil outlet of the first hydraulically controlled two-position two-way directional valve 5 is connected to the oil inlet of the second hydraulically controlled two-position two-way directional valve 6 and the pilot circuit of the third hydraulically controlled two-position two-way directional valve 8, respectively. The pilot circuit of the eighth hydraulically controlled two-position two-way directional valve 17 is located before the fourth throttle valve 18. The oil outlet of the eighth hydraulically controlled two-position two-way directional valve 17 is connected to the oil inlet of the sixth hydraulically controlled two-position two-way directional valve 15 and the pilot circuit of the seventh hydraulically controlled two-position two-way directional valve 16, respectively.

[0024] The pilot circuit of the fourth hydraulically controlled two-position two-way directional valve 9 is located after the second throttle valve 10. The oil outlet of the fourth hydraulically controlled two-position two-way directional valve 9 is connected to the oil inlet of the second hydraulically controlled two-position two-way directional valve 6 and the pilot circuit of the third hydraulically controlled two-position two-way directional valve 8, respectively. The pilot circuit of the fifth hydraulically controlled two-position two-way directional valve 14 is located after the third throttle valve 13. The oil outlet of the fifth hydraulically controlled two-position two-way directional valve 14 is connected to the oil inlet of the sixth hydraulically controlled two-position two-way directional valve 15 and the pilot circuit of the seventh hydraulically controlled two-position two-way directional valve 16, respectively.

[0025] The oil outlets of the second hydraulically controlled two-position two-way directional valve 6 and the sixth hydraulically controlled two-position two-way directional valve 15 are both connected to the oil tank 7.

[0026] The anti-slip control valve group 2 also includes a shuttle valve 11 and a hydraulically controlled two-position three-way directional valve 12. A third oil supply line 21 is provided between the first oil supply line 19 and the second oil supply line 20. The shuttle valve 11 is provided on the third oil supply line 21. One of the outlets of the shuttle valve 11 is connected to the inlet of the hydraulically controlled two-position three-way directional valve 12, and the other is connected to the pilot circuit of the hydraulically controlled two-position three-way directional valve 12. One of the outlets of the hydraulically controlled two-position three-way directional valve 12 is connected to the pilot circuit of the second hydraulically controlled two-position two-way directional valve 6, and the other is connected to the pilot circuit of the sixth hydraulically controlled two-position two-way directional valve 15.

[0027] The third oil supply line 21 is respectively located after the second throttle valve 10 and after the third throttle valve 13 at both ends;

[0028] There are multiple anti-slip control valve groups 2 and multiple hydraulic motors 3, with each anti-slip control valve group 2 and multiple hydraulic motors 3 corresponding to one another.

[0029] Working principle:

[0030] Throttle valves 4 and 18 have the same and fixed opening size. Under normal operating conditions, hydraulic oil flows through throttle valves 4 and 18, hydraulically controlled 2-way directional valves 8 and 16, and throttle valves 10 and 13 into the hydraulic motor. When slippage occurs, the hydraulic motor idles, increasing the flow rate through it. This, in turn, increases the flow rate through throttle valves 4 and 18, leading to a greater pressure difference across them. The hydraulic oil, via the pilot circuit, pushes hydraulically controlled 2-way directional valve 5 to the right and hydraulically controlled 2-way directional valve 17 to the left, thus opening both valves 5 and 17. The hydraulic oil further acts on hydraulically controlled 2-way directional valves 8 and 16, pushing valve 8 to the right and valve 16 to the left, ultimately closing valves 8 and 16 and blocking the flow of hydraulic oil to the hydraulic motor. When the friction between the tire and the ground returns to normal, the motor starts rotating under the drive of the wheel. The system re-establishes pressure, and hydraulic oil flows through shuttle valve 11, pushing the pilot circuit to move the hydraulically controlled 2-position 3-way directional valve 12 to the left. This allows the hydraulic oil to enter the pilot circuit of hydraulically controlled 2-position 2-way directional valves 6 and 15, pushing them upward and opening them. The hydraulic oil previously trapped in the pilot circuit returns to the oil tank via hydraulically controlled 2-position 2-way directional valves 6 and 15, unloading the pilot circuit. Hydraulically controlled 2-position 2-way directional valves 5, 8, 16, and 17 return to their original positions, and the system continues to supply oil to the motor normally. If the motor rotates in the opposite direction, hydraulically controlled 2-position 2-way directional valves 9 and 14 replace the function of hydraulically controlled 2-position 2-way directional valves 5 and 17, with the same anti-slip working principle.

[0031] In addition to the above embodiments, the present invention also includes other embodiments. All technical solutions formed by equivalent transformation or equivalent substitution should fall within the protection scope of the claims of the present invention.

Claims

1. A fully hydraulic automatic anti-slip system, characterized in that: It includes hydraulic pump (1), anti-slip control valve group (2) and hydraulic motor (3) connected in series; The anti-slip control valve group (2) comprises a first oil supply pipeline (19), the first oil supply pipeline (19) is sequentially provided with a first throttle valve (4), a third hydraulic control two-position two-way directional valve (8) and a second throttle valve (10), the first throttle valve (4) is provided with a first hydraulic control two-position two-way directional valve (5) in parallel at the position, and the second throttle valve (10) is provided with a fourth hydraulic control two-position two-way directional valve (9) in parallel at the position. The anti-slip control valve group (2) further comprises a second oil supply pipeline (20), the second oil supply pipeline (20) is sequentially provided with a fourth throttle valve (18), a seventh hydraulic control two-position two-way directional valve (16) and a third throttle valve (13), the fourth throttle valve (18) is provided with an eighth hydraulic control two-position two-way directional valve (17) in parallel at the position, and the third throttle valve (13) is provided with a fifth hydraulic control two-position two-way directional valve (14) in parallel. The anti-slip control valve group (2) further comprises a second hydraulic control two-position two-way directional valve (6), an oil tank (7) and a sixth hydraulic control two-position two-way directional valve (15), a pilot circuit of the first hydraulic control two-position two-way directional valve (5) is arranged before the first throttle valve (4), oil outlets of the first hydraulic control two-position two-way directional valve (5) are connected with an oil inlet of the second hydraulic control two-position two-way directional valve (6) and a pilot circuit of the third hydraulic control two-position two-way directional valve (8) respectively; a pilot circuit of the eighth hydraulic control two-position two-way directional valve (17) is arranged before the fourth throttle valve (18), oil outlets of the eighth hydraulic control two-position two-way directional valve (17) are connected with an oil inlet of the sixth hydraulic control two-position two-way directional valve (15) and a pilot circuit of the seventh hydraulic control two-position two-way directional valve (16) respectively.

2. A fully hydraulic automatic anti-slip system according to claim 1, characterized in that: A pilot circuit of the fourth hydraulic control two-position two-way directional valve (9) is arranged after the second throttle valve (10), oil outlets of the fourth hydraulic control two-position two-way directional valve (9) are connected with an oil inlet of the second hydraulic control two-position two-way directional valve (6) and a pilot circuit of the third hydraulic control two-position two-way directional valve (8) respectively, a pilot circuit of the fifth hydraulic control two-position two-way directional valve (14) is arranged after the third throttle valve (13), and oil outlets of the fifth hydraulic control two-position two-way directional valve (14) are connected with an oil inlet of the sixth hydraulic control two-position two-way directional valve (15) and a pilot circuit of the seventh hydraulic control two-position two-way directional valve (16) respectively.

3. A fully hydraulic automatic anti-slip system according to claim 2, characterized in that: Oil outlets of the second hydraulic control two-position two-way directional valve (6) and the sixth hydraulic control two-position two-way directional valve (15) are connected with the oil tank (7).

4. A fully hydraulic automatic anti-slip system according to claim 1, characterized in that: The anti-slip control valve group (2) further comprises a shuttle valve (11) and a hydraulic control two-position three-way directional valve (12), a third oil supply pipeline (21) is arranged between the first oil supply pipeline (19) and the second oil supply pipeline (20), the shuttle valve (11) is arranged on the third oil supply pipeline (21), an oil outlet of the shuttle valve (11) is connected to an oil inlet of the hydraulic control two-position three-way directional valve (12) in one way, and is connected to a pilot circuit of the hydraulic control two-position three-way directional valve (12) in another way, an oil outlet of the hydraulic control two-position three-way directional valve (12) is connected to a pilot circuit of the second hydraulic control two-position two-way directional valve (6) in one way, and is connected to a pilot circuit of the sixth hydraulic control two-position two-way directional valve (15) in another way.

5. A fully hydraulic automatic anti-slip system according to claim 4, characterized in that: The third oil supply pipeline (21) is arranged at the rear of the second throttle valve (10) and the rear of the third throttle valve (13) respectively.

6. A fully hydraulic automatic anti-slip system according to claim 1, characterized in that: The anti-slip control valve group (2) and the hydraulic motor (3) are multiple, and the multiple anti-slip control valve groups (2) and the multiple hydraulic motors (3) are one-to-one corresponding.

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