Winch motor starting control system

Abstract

The utility model discloses a winch motor starting control system which comprises a control valve set, a balance valve, a winch motor and a motor brake oil cylinder, an oil port C of the balance valve is communicated with a first oil port of the winch motor, an oil port BR of the balance valve is communicated with the motor brake oil cylinder, an oil port A of the balance valve is communicated with an oil port A of the control valve set, and an oil port B of the control valve set is communicated with an oil port C of the winch motor. And an oil port B of the control valve group is respectively communicated with an oil port PI of the control valve group and a second oil port of the winch motor. According to the winch motor starting control system provided by the utility model, the balance valve is not opened when the system pressure is small at the initial starting stage of the winch motor, so that a certain pressure is accumulated in the winch motor; only when the system pressure reaches a set value, the balance valve is opened, then unlocking pressure is output, and the winch motor is started, so that fierce jumping of the winch is effectively avoided, the running smoothness is good, and the safety is high.

Description

Technical Field

[0001] The utility model relates to the technical field of lifting equipment, and in particular discloses a winch motor starting control system. Background Art

[0002] Lifting equipment using hydraulic motors for winching operations typically incorporates a brake device to allow the winch to stop at any position. During the initial startup of the winch motor, the system is unloaded and the system pressure is relatively low. Unlocking pressure, derived from the system pressure, causes the motor to rotate rapidly, which can severely cause the winch to vibrate violently.

[0003] Therefore, the above-mentioned defects existing in existing lifting equipment are technical problems that need to be solved urgently. Utility Model Content

[0004] The utility model provides a winch motor starting control system, aiming to solve at least one defect in the above-mentioned prior art.

[0005] The utility model relates to a winch motor starting control system, comprising a control valve group, a balancing valve, a winch motor and a motor brake cylinder, wherein the C oil port of the balancing valve is connected to the first oil port of the winch motor, the BR oil port of the balancing valve is connected to the motor brake cylinder, the A oil port of the balancing valve is connected to the A oil port of the control valve group, and the B oil port of the control valve group is respectively connected to the PI oil port of the control valve group and the second oil port of the winch motor.

[0006] Furthermore, the balancing valve includes a one-way valve, a main valve core of the balancing valve, a shuttle valve, a sequence valve and a throttle valve. The main valve core of the balancing valve is connected in parallel with the one-way valve and then connected to the shuttle valve, the sequence valve and the throttle valve in sequence.

[0007] Furthermore, the control valve group includes a relief valve, an electro-hydraulic proportional control valve and an electromagnetic reversing valve. The A oil port of the electromagnetic reversing valve is connected to the A oil port of the balancing valve, the B oil port of the electromagnetic reversing valve is connected to the second oil port of the winch motor, the P oil port of the electromagnetic reversing valve is respectively connected to the oil inlet of the relief valve and the oil inlet of the electro-hydraulic proportional control valve, and the T oil port of the electromagnetic reversing valve is respectively connected to the oil outlet of the relief valve and the oil outlet of the electro-hydraulic proportional control valve.

[0008] Furthermore, the P oil port of the control valve group is connected to the oil inlet filter and the hydraulic pump in sequence.

[0009] Furthermore, the hydraulic pump is connected to the motor.

[0010] Furthermore, the oil suction port of the hydraulic pump is connected to the oil tank.

[0011] Furthermore, the T oil port of the control valve group is connected to the return oil filter.

[0012] The beneficial effects achieved by the utility model are:

[0013] The utility model provides a winch motor starting control system, which uses a control valve group, a balancing valve, a winch motor, and a motor brake cylinder. The C oil port of the balancing valve is connected to the first oil port of the winch motor, the BR oil port of the balancing valve is connected to the motor brake cylinder, the A oil port of the balancing valve is connected to the A oil port of the control valve group, and the B oil port of the control valve group is connected to the PI oil port of the control valve group and the second oil port of the winch motor, respectively. The winch motor starting control system provided by the utility model has the following characteristics: when the system pressure is low at the initial start-up of the winch motor, the balancing valve does not open, allowing the winch motor to accumulate a certain amount of pressure; only when the system pressure reaches a set value does the balancing valve open, outputting the unlocking pressure, and starting the winch motor, thereby effectively avoiding violent winch vibrations and ensuring smooth operation and high safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the principle of an embodiment of a winch motor starting control system of the present invention.

[0015] Description of Figure Numbers:

[0016] 10. Control valve group; 20. Balance valve; 30. Winch motor; 40. Motor brake cylinder; 21. Check valve; 22. Balance valve main valve core; 23. Shuttle valve; 24. Sequence valve; 25. Throttle valve; 11. Overflow valve; 12. Electro-hydraulic proportional control valve; 13. Solenoid reversing valve; 41. Oil inlet filter; 42. Hydraulic pump; 43. Motor; 44. Return oil filter; 45. Fuel tank. DETAILED DESCRIPTION

[0017] In order to better understand the above technical solution, the above technical solution will be described in detail below with reference to the accompanying drawings and specific implementation methods.

[0018] like Figure 1 As shown, the first embodiment of the present invention proposes a winch motor starting control system, including a control valve group 10, a balancing valve 20, a winch motor 30 and a motor brake cylinder 40, wherein the C oil port of the balancing valve 20 is connected to the first oil port of the winch motor 30, the BR oil port of the balancing valve 20 is connected to the motor brake cylinder 40, the A oil port of the balancing valve 20 is connected to the A oil port of the control valve group 10, and the B oil port of the control valve group 10 is respectively connected to the PI oil port of the control valve group 10 and the second oil port of the winch motor 30.

[0019] Further, see Figure 1In the winch motor startup control system provided in this embodiment, the balancing valve 20 includes a check valve 21, a main balancing valve core 22, a shuttle valve 23, a sequence valve 24, and a throttle valve 25. The main balancing valve core 22 is connected in parallel with the check valve 21 and then sequentially connected to the shuttle valve 23, the sequence valve 24, and the throttle valve 25. In the winch motor startup control system provided in this embodiment, the sequence valve 24 in the balancing valve 20 does not open when the system pressure is low during the initial startup of the winch motor 30, allowing the winch motor 30 to accumulate a certain pressure. Only when the system pressure reaches a certain value does the sequence valve 24 open, outputting the unlocking pressure and starting the winch motor, thus preventing violent winch pulsation.

[0020] Preferably, see Figure 1 The hoist motor starting control system provided in this embodiment comprises a control valve group 10 including a relief valve 11, an electro-hydraulic proportional control valve 12, and a solenoid reversing valve 13. The A oil port of the solenoid reversing valve 13 is connected to the A oil port of the balancing valve 20, the B oil port of the solenoid reversing valve 13 is connected to the second oil port of the hoist motor 30, the P oil port of the solenoid reversing valve 13 is connected to the oil inlet of the relief valve 11 and the oil inlet of the electro-hydraulic proportional control valve 12, respectively, and the T oil port of the solenoid reversing valve 13 is connected to the oil outlet of the relief valve 11 and the oil outlet of the electro-hydraulic proportional control valve 12, respectively. The P oil port of the control valve group 10 is connected in sequence to an oil inlet filter 41 and a hydraulic pump 42. The hydraulic pump 42 is connected to a motor 43. The oil suction port of the hydraulic pump 42 is connected to a fuel tank 45. The T oil port of the control valve group 10 is connected to an oil return filter 44.

[0021] like Figure 1 As shown, the working principle of the winch motor starting control system provided in this embodiment is as follows:

[0022] When the hoisting motor 30 is lowered, the solenoid reversing valve 13 in the control valve assembly 10 is in the upper position. High-pressure oil flows from the hydraulic pump 42 through the oil inlet filter 41, through port P of the solenoid reversing valve 13, and reaches port B, entering the working chamber of the hoisting motor 30. At this point, because the motor brake cylinder 40 is open, the hoisting motor 30 cannot be lowered. The high-pressure oil flows through port PI on the counterbalance valve 20 to the main spool 22 and shuttle valve 23. Because the other side of the shuttle valve 23 is connected to port A of the solenoid reversing valve 13 on the control valve assembly 10, port A is now connected to the low-pressure port T. The steel ball in the shuttle valve 23 is pushed to the left, and high-pressure oil from port PI reaches the inlet of the sequence valve 24. If the pressure does not reach the set pressure of the sequence valve 24, the sequence valve 24 cannot open, and the high-pressure oil cannot pass through the sequence valve 24 to the motor brake cylinder 40 of the hoisting motor 30, causing the hoisting motor 30 to lock. When the high-pressure oil pressure reaches the set pressure of the sequence valve 24, the sequence valve 24 opens; at the same time, due to the existence of the throttle valve 25, the high-pressure oil will not all flow back to the oil tank 45, and will partially enter the motor brake cylinder 40 of the hoisting motor 30 through the unlocking port BR oil port of the balance valve 20, so that the hoisting motor 30 is in an unlocked state, and then the hoisting and lowering of the hoisting motor 30 is started to directly complete the entire action.

[0023] Compared with the prior art, the winch motor starting control system provided in this embodiment utilizes a control valve group, a balancing valve, a winch motor, and a motor brake cylinder. The C port of the balancing valve is connected to the first port of the winch motor, the BR port of the balancing valve is connected to the motor brake cylinder, the A port of the balancing valve is connected to the A port of the control valve group, and the B port of the control valve group is connected to the PI port of the control valve group and the second port of the winch motor, respectively. The winch motor starting control system provided in this embodiment does not open when the system pressure is low at the initial start-up of the winch motor, allowing the winch motor to accumulate a certain amount of pressure. Only when the system pressure reaches the set value does the balancing valve open, outputting the unlocking pressure and starting the winch motor, thereby effectively avoiding violent winch vibrations and ensuring smooth and safe operation.

[0024] Although preferred embodiments of the present invention have been described, those skilled in the art may make additional changes and modifications to these embodiments once they are aware of the basic inventive concepts. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the present invention. Clearly, those skilled in the art may make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, to the extent such changes and modifications fall within the scope of the claims and their equivalents, the present invention is intended to encompass such changes and modifications.

Claims

1. A winch motor starting control system, characterized in that: The invention comprises a control valve group (10), a balancing valve (20), a hoisting motor (30) and a motor brake cylinder (40), wherein the C oil port of the balancing valve (20) is connected to the first oil port of the hoisting motor (30), the BR oil port of the balancing valve (20) is connected to the motor brake cylinder (40), the A oil port of the balancing valve (20) is connected to the A oil port of the control valve group (10), and the B oil port of the control valve group (10) is respectively connected to the PI oil port of the control valve group (10) and the second oil port of the hoisting motor (30).

2. The hoisting motor starting control system according to claim 1, characterized in that: The balancing valve (20) comprises a one-way valve (21), a main valve core of the balancing valve (22), a shuttle valve (23), a sequence valve (24) and a throttle valve (25). The main valve core of the balancing valve (22) is connected in parallel with the one-way valve (21) and is then connected in sequence with the shuttle valve (23), the sequence valve (24) and the throttle valve (25).

3. The hoisting motor starting control system according to claim 1, characterized in that: The control valve group (10) includes a relief valve (11), an electro-hydraulic proportional control valve (12) and an electromagnetic reversing valve (13); the oil port A of the electromagnetic reversing valve (13) is connected to the oil port A of the balancing valve (20); the oil port B of the electromagnetic reversing valve (13) is connected to the second oil port of the hoisting motor (30); the oil port P of the electromagnetic reversing valve (13) is connected to the oil inlet of the relief valve (11) and the oil inlet of the electro-hydraulic proportional control valve (12), respectively; and the oil port T of the electromagnetic reversing valve (13) is connected to the oil outlet of the relief valve (11) and the oil outlet of the electro-hydraulic proportional control valve (12), respectively.

4. The hoisting motor starting control system according to claim 1, characterized in that: The oil port P of the control valve group (10) is connected to the oil inlet filter (41) and the hydraulic pump (42) in sequence.

5. The hoisting motor starting control system according to claim 4, characterized in that: The hydraulic pump (42) is connected to the motor (43).

6. The hoisting motor starting control system according to claim 4, characterized in that: The oil suction port of the hydraulic pump (42) is connected to the oil tank (45).

7. The hoisting motor starting control system according to claim 1, characterized in that: The T oil port of the control valve group (10) is connected to the oil return filter (44).

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