Active replenishing hydraulic system for an anchor winch

Abstract

An active oil replenishment hydraulic system for anchor winches includes a hydraulic pump assembly, a hydraulic oil tank assembly, a control valve assembly, a motor, an active oil replenishment device, and a return check valve. The outlet of the hydraulic oil tank assembly is connected to the inlet of the hydraulic pump assembly, the outlet of the hydraulic pump assembly is connected to the MP port of the control valve assembly, the outlet of the control valve assembly is connected to the A port of the motor, the B port of the motor is connected to the MB port of the active oil replenishment device, the B port of the motor is connected to the inlet of the return check valve, and the outlet of the return check valve is connected to the inlet of the hydraulic pump assembly. The control valve assembly includes a directional valve, a load-sensitive valve, a relief valve, and a balance valve assembly. This invention uses the active oil replenishment device to enter the control valve assembly and actively replenish the three internal oil circuits of the control valve assembly. When the control valve assembly is in the neutral position, it replenishes the hydraulic oil leaking in the oil circuits.

Description

Technical Field

[0001] This invention relates to an improvement in the oil replenishment technology of anchor winches, belonging to the field of anchor winch equipment, and particularly to an active oil replenishment hydraulic system for anchor winches. Background Technology

[0002] When the hydraulic motor stops supplying pressurized oil, the motor continues to rotate due to inertia. This causes negative pressure at the motor inlet, leading to gas release from the hydraulic oil. Under pressure, this gradually results in cavitation, generating noise and affecting the motor's lifespan. In severe cases, it can even damage the motor. Furthermore, the anchor winch hydraulic pump station is located below deck, and the system control valve group uses a Y-type mechanism. Due to the weight of the hydraulic oil and poor sealing of the hydraulic valve group, the hydraulic oil in the pipeline will gradually leak, leading to insufficient hydraulic oil in the hydraulic system. The existing passive oil replenishment system can only replenish oil when the replenishment device is actively operating and the system is running normally. This results in insufficient hydraulic oil replenishment, causing inadequate lubrication inside the motor and dry friction, ultimately damaging the motor.

[0003] Chinese patent application CN 202011347405.4, filed on November 26, 2020, discloses a hydraulic synchronization system based on volumetric control. One pipeline of the oil tank device is equipped with a pump unit and a check valve (first check valve) to serve as the oil inlet pipeline of the hydraulic system, providing a power source. The other pipeline connected to the oil tank device serves as the return oil pipeline, equipped with a check valve (second check valve) to establish a certain return oil resistance, ensuring that the return oil pipeline is full of oil and providing sufficient oil for the passive oil replenishment circuit. The pipeline between the check valve (first check valve) on the inlet pipeline and the check valve (second check valve) on the return oil pipeline is connected by an electromagnetic relief valve. One pipeline is proportionally controlled by a proportional directional valve installed on the pipeline. When electromagnet BL applies a signal, the first and second solenoid valves are energized, and pressurized oil enters the synchronizing device. The synchronizing device extends, and the oil in chamber V flows through the first and second solenoid valves and pipelines into the left and right actuator cylinders respectively. Another pipeline connects to the right actuator cylinder via a solenoid directional valve, a one-way speed control valve, and the second solenoid valve. The electromagnet DT of the solenoid directional valve is energized, and the oil in the right actuator cylinder pipeline returns to the oil tank through the one-way speed control valve and the solenoid directional valve. However, the above technology does not solve the problem of not being able to actively replenish oil when the hydraulic motor pressure oil supply stops.

[0004] The information disclosed in this background section is intended only to enhance the understanding of the overall background of this patent application and should not be construed as an admission or in any way implying that the information constitutes prior art known to those skilled in the art. Summary of the Invention

[0005] The purpose of this invention is to overcome the problem in the prior art that the hydraulic motor cannot actively replenish oil when the hydraulic oil supply stops, and to provide an active oil replenishment hydraulic system for anchor winches that can actively replenish oil when the hydraulic motor pressure oil supply stops.

[0006] To achieve the above objectives, the technical solution of the present invention is: an active oil replenishment hydraulic system for anchor winches, wherein the active oil replenishment hydraulic system for anchor winches includes a hydraulic pump group, a hydraulic oil tank assembly, a control valve group, a motor, an active oil replenishment device, and a return oil check valve;

[0007] The oil outlet of the hydraulic oil tank assembly is connected to the oil inlet of the hydraulic pump assembly, the oil outlet of the hydraulic pump assembly is connected to the MP port of the control valve assembly, the oil outlet of the control valve assembly is connected to the A port of the motor, the B port of the motor is connected to the MB port of the active oil replenishment device, the B port of the motor is connected to the oil inlet of the return oil check valve, and the oil outlet of the return oil check valve is connected to the oil inlet of the hydraulic pump assembly.

[0008] The control valve group includes a directional valve, a load-sensitive valve, a relief valve, a balancing valve group, and an overload replenishing valve group;

[0009] The oil inlet of the load-sensitive valve is connected to the oil outlet of the hydraulic pump group, the oil outlet of the load-sensitive valve is connected to the P port of the reversing valve, the B port of the reversing valve is connected to the oil inlet of the balance valve group, the oil outlet of the balance valve group is connected to the oil inlet of the overload replenishing valve group, and the oil inlet of the overload replenishing valve group is connected to the A port of the motor.

[0010] The motor's port B is connected to the reversing valve's port A, and the reversing valve's port T is connected to the oil inlet of the return oil check valve.

[0011] The overflow valve is connected to the reversing valve;

[0012] The active oil replenishment device includes a throttle joint and an oil replenishment check valve. The oil outlet of the hydraulic pump unit is connected to the oil inlet of the throttle joint via port P and port MP. The oil outlet of the throttle joint is connected to the oil inlet of the oil replenishment check valve. The oil outlet of the oil replenishment check valve is connected to port B of the motor.

[0013] When hydraulic oil flows from port A to port B in the balance valve assembly, the balance valve assembly functions as a relief valve; when hydraulic oil flows from port B to port A in the balance valve assembly, the balance valve assembly functions as a one-way valve.

[0014] The B port of the balance valve assembly is connected to the B port of the reversing valve.

[0015] Port A of the balance valve assembly is connected to Port A of the motor.

[0016] The pilot end of the balance valve assembly is connected to port B of the motor.

[0017] The overload replenishing valve assembly includes an overload replenishing valve, a third check valve, and a fifth check valve. The oil inlet of the second check valve is connected to the oil circuit between port A of the motor and the balance valve assembly. The oil outlet of the second check valve is connected to the oil inlet of the overload replenishing valve. The oil outlet of the overload replenishing valve is connected to the oil inlet of the fourth check valve. The oil outlet of the fourth check valve is connected to the oil circuit between port B of the motor and the balance valve assembly.

[0018] The overload replenishing valve assembly also includes a fourth check valve and a sixth check valve. The oil inlet of the fourth check valve is connected to the oil circuit between the motor's B port and the balance valve assembly. The oil outlet of the fourth check valve is connected to the oil inlet of the overload replenishing valve. The oil outlet of the overload replenishing valve is connected to the oil inlet of the sixth check valve. The oil inlet of the sixth check valve is connected to the oil circuit between the motor's A port and the balance valve assembly.

[0019] The oil circuit between port B of the motor and the balance valve assembly is a single oil circuit, while the oil circuit between port A of the motor and the balance valve assembly is a triple oil circuit.

[0020] The oil inlet of the overflow valve is connected to the high-pressure port of the reversing valve, and the oil outlet of the overflow valve is connected to the T port of the control valve group.

[0021] The throttling connector is connected to the MP port of the control valve assembly, and the oil outlet of the check valve is connected to the MB port of the control valve assembly.

[0022] The diameter of the damping orifice of the throttle connector is calculated according to the required oil replenishment amount of the motor using the following formula:

[0023]

[0024] Where Q represents flow rate, and C represents flow rate. q ρ is the flow coefficient, A0 is the cross-sectional area of ​​the channel, Δp is the pressure difference, and ρ is the fluid density.

[0025] The oil circuit between the return oil check valve and the hydraulic oil tank assembly is a four-way oil circuit.

[0026] The oil circuit between the return oil check valve and the active oil replenishment device is a dual oil circuit.

[0027] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0028] 1. In an active oil replenishment hydraulic system for an anchor winch, the oil outlet of the hydraulic oil tank assembly is connected to the oil inlet of the hydraulic pump assembly; the oil outlet of the hydraulic pump assembly is connected to the MP port of the control valve assembly; the oil outlet of the control valve assembly is connected to the A port of the motor; the B port of the motor is connected to the MB port of the active oil replenishment device; the B port of the motor is connected to the oil inlet of the return oil check valve; and the oil outlet of the return oil check valve is connected to the oil inlet of the hydraulic pump assembly. In application, when the supply of pressurized oil to the motor stops, the directional valve is in the neutral position. The control valve assembly actively controls the hydraulic oil. The hydraulic oil passes through an active oil replenishment device into two oil circuits: one between the motor's port B and the balance valve assembly, and the other between the control valve assembly and the return check valve. This active replenishment of oil to these two circuits is achieved. Because the return check valve has a certain back pressure, the hydraulic oil can pass through the directional valve and the balance valve into the internal oil circuits of the control valve assembly, actively replenishing the three internal oil circuits. This active replenishment can also replenish leaked hydraulic oil when the motor's pressurized oil supply stops. Therefore, this invention allows for active oil replenishment and is simple to operate.

[0029] 2. In the active oil replenishment hydraulic system for anchor winches of this invention, after the anchor winch completes its work, the operating handle of the reversing valve returns to center. At this time, the reversing valve is in Y-type function. Under the action of inertial force, one of the motor's oil ports A or B becomes the oil inlet. The hydraulic pump unit delivers hydraulic oil from the hydraulic oil tank assembly to the oil inlet of the control valve assembly. The hydraulic oil enters the motor's oil port A through the active oil replenishment device, or enters the motor's oil port B through the active oil replenishment device, reversing valve, and balance valve assembly, actively replenishing the oil at the motor's oil port A or B. This ensures that the hydraulic oil at the motor's oil port A or B remains sufficient under the action of inertial force, preventing negative pressure from forming at the motor's oil port, gas from escaping from the hydraulic oil, or motor damage. Therefore, this invention reduces system noise, delays cavitation formation, and extends the motor's service life.

[0030] 3. In the active oil replenishment hydraulic system for anchor winches of this invention, the inlet of the load-sensitive valve is connected to the outlet of the hydraulic pump assembly, the outlet of the load-sensitive valve is connected to the P port of the directional valve, the B port of the directional valve is connected to the inlet of the balance valve assembly, the outlet of the balance valve assembly is connected to the inlet of the overload replenishment valve assembly, and the inlet of the overload replenishment valve assembly is connected to the A port of the motor. In application, a relief valve is installed at the motor valve assembly of the anchor winch hydraulic system for system safety. A relief valve is also installed at the control valve assembly of the anchor winch. If an relief valve is used for active oil replenishment, the set pressure value of the relief valve for active oil replenishment cannot be lower than the relief valve pressure. The throttling joint of the active oil replenishment system cannot be replaced by a relief valve. Therefore, this invention is safe to use and operates stably.

[0031] 4. In the active oil replenishment hydraulic system for anchor winches of the present invention, the oil replenishment device adopts a throttling connector. By changing the diameter of the throttling orifice, the oil replenishment amount can be adjusted, and active oil replenishment can be performed on the system without reaching the set pressure value. Therefore, the present invention allows for adjustable oil replenishment and convenient replenishment. Attached Figure Description

[0032] Figure 1 This is a schematic diagram of the structure of the present invention.

[0033] Figure 2 This is a schematic diagram of the control valve assembly in this invention.

[0034] In the diagram: 1. Hydraulic pump assembly; 2. Hydraulic oil tank assembly; 3. Control valve assembly; 4. Motor; 5. Active oil replenishment device; 6. Throttling connector; 7. Oil replenishment check valve; 8. Oil return check valve; 9. Directional valve; 91. Load-sensitive valve; 10. Relief valve; 11. Balance valve assembly; 12. Overload oil replenishment valve assembly; 121. Overload oil replenishment valve; 122. Fourth check valve; 123. Third check valve; 124. Sixth check valve; 125. Fifth check valve. Detailed Implementation

[0035] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0036] See Figures 1 to 2 An active oil replenishment hydraulic system for anchor winches, the active oil replenishment hydraulic system for anchor winches includes a hydraulic pump group 1, a hydraulic oil tank assembly 2, a control valve group 3, a motor 4, an active oil replenishment device 5, and a return oil check valve 8.

[0037] The oil outlet of the hydraulic oil tank assembly 2 is connected to the oil inlet of the hydraulic pump assembly 1. The oil outlet of the hydraulic pump assembly 1 is connected to the MP port of the control valve assembly 3. The oil outlet of the control valve assembly 3 is connected to the A port of the motor 4. The B port of the motor 4 is connected to the MB port of the active oil replenishment device 5. The B port of the motor 4 is connected to the oil inlet of the return oil check valve 8. The oil outlet of the return oil check valve 8 is connected to the oil inlet of the hydraulic pump assembly 1.

[0038] The control valve group 3 includes a reversing valve 9, a load-sensitive valve 91, a relief valve 10, a balance valve group 11, and an overload replenishing valve group 12.

[0039] The oil inlet of the load-sensitive valve 91 is connected to the oil outlet of the hydraulic pump group 1, the oil outlet of the load-sensitive valve 91 is connected to the P port of the reversing valve 9, the B port of the reversing valve 9 is connected to the oil inlet of the balance valve group 11, the oil outlet of the balance valve group 11 is connected to the oil inlet of the overload replenishing valve group 12, and the oil inlet of the overload replenishing valve group 12 is connected to the A port of the motor 4.

[0040] The B port of the motor 4 is connected to the A port of the reversing valve 9, and the T port of the reversing valve 9 is connected to the oil inlet of the return oil check valve 8.

[0041] The overflow valve 10 is connected to the reversing valve 9;

[0042] The active oil replenishment device 5 includes a throttle connector 6 and an oil replenishment check valve 7. The oil outlet of the hydraulic pump group 1 is connected to the oil inlet of the throttle connector 6 via the P port and the MP port. The oil outlet of the throttle connector 6 is connected to the oil inlet of the oil replenishment check valve 7. The oil outlet of the oil replenishment check valve 7 is connected to the B port of the motor 4.

[0043] The balance valve assembly 11 includes an overflow function and a one-way function. When hydraulic oil flows from port A to port B of the balance valve assembly 11, the balance valve assembly 11 functions as an overflow valve; when hydraulic oil flows from port B to port A of the balance valve assembly 11, the balance valve assembly functions as a one-way valve.

[0044] The B port of the balance valve assembly 11 is connected to the B port of the reversing valve.

[0045] The A port of the balance valve assembly 11 is connected to the A port of the motor 4.

[0046] The pilot end of the balance valve assembly 11 is connected to port B of the motor 4.

[0047] The overload replenishing valve assembly 12 includes an overload replenishing valve 121, a third check valve 123, and a fifth check valve 125. The oil inlet of the second check valve 122 is connected to the oil circuit between port A of the motor 4 and the balance valve assembly 11. The oil outlet of the second check valve 122 is connected to the oil inlet of the overload replenishing valve 121. The oil outlet of the overload replenishing valve 121 is connected to the oil inlet of the fourth check valve 124. The oil outlet of the fourth check valve 124 is connected to the oil circuit between port B of the motor 4 and the balance valve assembly 11.

[0048] The overload replenishing valve assembly 12 also includes a fourth check valve 122 and a sixth check valve 124. The oil inlet of the fourth check valve 122 is connected to the oil circuit between port B of the motor 4 and the balance valve assembly 11. The oil outlet of the fourth check valve 122 is connected to the oil inlet of the overload replenishing valve 121. The oil outlet of the overload replenishing valve 121 is connected to the oil inlet of the sixth check valve 124. The oil inlet of the sixth check valve 124 is connected to the oil circuit between port A of the motor 4 and the balance valve assembly 11.

[0049] The oil circuit between port B of motor 4 and balance valve group 11 is a single oil circuit, while the oil circuit between port A of motor 4 and balance valve group 11 is a triple oil circuit.

[0050] The oil inlet of the overflow valve 10 is connected to the high-pressure port of the reversing valve 9, and the oil outlet of the overflow valve is connected to the T port of the control valve group 3.

[0051] The throttling connector 6 is connected to the MP port of the control valve group 3, and the oil outlet of the one-way valve 7 is connected to the MB port of the control valve group 3.

[0052] The diameter of the damping orifice of the throttle connector 6 is calculated according to the required oil replenishment amount of the motor 4 using the following formula:

[0053]

[0054] Where Q represents flow rate, and C represents flow rate. q ρ is the flow coefficient, A0 is the cross-sectional area of ​​the channel, Δp is the pressure difference, and ρ is the fluid density.

[0055] The oil circuit between the return oil check valve 8 and the hydraulic oil tank assembly 2 is a four-way oil circuit.

[0056] The oil circuit between the return oil check valve 8 and the active oil replenishment device 5 is a dual oil circuit.

[0057] When applying:

[0058] When hydraulic pump unit 1 is started, the operating handle of directional valve 9 remains in the neutral position (Y-type function). Hydraulic pump unit 1 delivers hydraulic oil from hydraulic oil tank assembly 2 to the inlet P of control valve assembly 3. The hydraulic oil flows through the MP port of control valve assembly 3, sequentially through the throttle joint 6 of the active oil replenishment device, and the check valve 7 into the MB port of control valve assembly 3. The hydraulic oil enters the internal oil circuit of control valve assembly 3. After entering control valve assembly 3, the hydraulic oil actively replenishes the internal oil circuit 1 of control valve assembly 3. At this time, directional valve 9 is in the neutral position. In the neutral position (Y-type function), hydraulic oil can enter the second oil circuit between the control valve group 3 and the return check valve 8 through the reversing valve 9, actively replenishing the second oil circuit; since the return check valve 8 has a certain back pressure, hydraulic oil can enter the internal oil circuit 3 of the control valve group 3 through the reversing valve 9 and the balance valve 11, actively replenishing the internal three oil circuits of the control valve group 3; by actively replenishing the system, the hydraulic oil leaked in the first, second, and third oil circuits when the system is not running for a long time can be compensated;

[0059] After the anchor winch completes its winding function, the operating handle of the reversing valve 9 returns to the center. At this time, the reversing valve 9 is in the neutral position (Y-type function). Under the action of inertial force, the oil port A of the motor 4 becomes the oil inlet. The hydraulic pump group 1 delivers hydraulic oil from the hydraulic oil tank assembly 2 to the oil inlet P of the control valve group 3. The hydraulic oil flows through the MP port of the control valve group 3, through the throttle joint 6 of the active oil replenishment device 5, and the check valve 7 into the MB port of the control valve group 3. The hydraulic oil enters the internal oil circuit 3 of the control valve group 3 through the reversing valve 9 and the balance valve group 11 to reach the oil port A of the motor 4, actively replenishing the oil at the motor oil port A to ensure that the hydraulic oil at the oil port A of the motor 4 is still sufficient under the action of inertial force.

[0060] After the anchor winch completes its release function, the operating handle of the reversing valve 9 returns to the center. At this time, the control valve group is in the neutral position (Y-type function). Under the action of inertial force, the oil port B of the motor 4 becomes the oil inlet. The hydraulic oil flows from the MP port of the control valve group 3 through the throttle joint 6 of the active oil replenishment device and the check valve 7 into the MB port of the control valve group 3. The hydraulic oil enters the internal oil circuit 1 of the control valve group 3 to actively replenish the oil port B of the motor 4, ensuring that the hydraulic oil at the oil port B of the motor 4 is still sufficient under the action of inertial force.

[0061] After the system completes the active oil replenishment function, with the hydraulic pump group 1 not shut down, after sufficient oil replenishment in the first, second, and third oil circuits, the pressure in the oil circuits will gradually increase. When the pressure is greater than the opening pressure of the return oil check valve 8, the return oil check valve 8 will open appropriately according to the pressure in the oil circuit, and the hydraulic oil will flow back to the hydraulic oil tank assembly 2 through the return oil check valve 8 and the fourth oil circuit.

[0062] Example 1:

[0063] An active oil replenishment hydraulic system for an anchor winch, comprising a hydraulic pump assembly 1, a hydraulic tank assembly 2, a control valve assembly 3, a motor 4, an active oil replenishment device 5, and a return oil check valve 8; the outlet of the hydraulic tank assembly 2 is connected to the inlet of the hydraulic pump assembly 1, the outlet of the hydraulic pump assembly 1 is connected to the MP port of the control valve assembly 3, the outlet of the control valve assembly 3 is connected to the A port of the motor 4, the B port of the motor 4 is connected to the MB port of the active oil replenishment device 5, the B port of the motor 4 is connected to the inlet of the return oil check valve 8, and the outlet of the return oil check valve 8 is connected to the inlet of the hydraulic pump assembly 1; the control valve assembly 3 includes a directional valve 9, a load-sensitive valve 91, a relief valve 10, a balance valve assembly 11, and an overload replenishment valve assembly 12; the inlet of the load-sensitive valve 91 is connected to the MP port of the control valve assembly 3, the A port of the motor 4 is connected to the A port of the motor 4, the B port of the motor 4 is connected to the MB port of the active oil replenishment device 5, the B port of the motor 4 is connected to the inlet of the return oil check valve 8, and the outlet of the return oil check valve 8 is connected to the inlet of the hydraulic pump assembly 1; the control valve assembly 3 includes a directional valve 9, a load-sensitive valve 91, a relief valve 10, a balance valve assembly 11, and an overload replenishment valve assembly 12; the inlet of the load-sensitive valve 91 is connected to the MP port of the control valve assembly 3, the MP port of the control valve assembly 3 is connected to the MP port of the motor 4, the B port of the motor 4 is connected to the MP port of the active oil replenishment device 5, the MP port of the motor 4 is connected to the MP port of the return oil check valve 8, and The oil end is connected to the oil outlet of the hydraulic pump group 1; the oil outlet of the load-sensitive valve 91 is connected to the P port of the directional valve 9; the B port of the directional valve 9 is connected to the oil inlet of the balance valve group 11; the oil outlet of the balance valve group 11 is connected to the oil inlet of the overload replenishing valve group 12; the oil inlet of the overload replenishing valve group 12 is connected to the A port of the motor 4; the B port of the motor 4 is connected to the A port of the directional valve 9; the T port of the directional valve 9 is connected to the oil inlet of the return oil check valve 8; the overflow valve 10 is connected to the directional valve 9; the active replenishing device 5 includes a throttle joint 6 and a replenishing oil check valve 7; the oil outlet of the hydraulic pump group 1 is connected to the oil inlet of the throttle joint 6 after passing through the P port and MP port; the oil outlet of the throttle joint 6 is connected to the oil inlet of the replenishing oil check valve 7; and the oil outlet of the replenishing oil check valve 7 is connected to the B port of the motor 4.

[0064] When applying:

[0065] After starting the hydraulic pump unit 1, the operating handle of the directional valve 9 remains in the neutral position. The hydraulic pump unit 1 delivers hydraulic oil from the hydraulic oil tank assembly 2 to the inlet P of the control valve group 3. The hydraulic oil flows through the MP port of the control valve group 3, sequentially through the throttle joint 6 of the active oil replenishment device and the check valve 7, into the MB port of the control valve group 3. The hydraulic oil enters the internal oil circuit of the control valve group 3. After entering the control valve group 3, the hydraulic oil actively replenishes the internal oil circuit 1 of the control valve group 3. At this time, the directional valve 9 is in the neutral position, and the hydraulic oil can enter the second oil circuit between the control valve group 3 and the return oil check valve 8 through the directional valve 9, actively replenishing the second oil circuit. Since the return oil check valve 8 has a certain back pressure, the hydraulic oil can enter the internal oil circuit 3 of the control valve group 3 through the directional valve 9 and the balance valve 11, actively replenishing the internal three oil circuits of the control valve group 3. By actively replenishing the system, the hydraulic oil leaking in the oil circuit is replenished when the system is not running for a long time.

[0066] Example 2:

[0067] Example 2 is basically the same as Example 1, except that:

[0068] An active oil replenishment hydraulic system for an anchor winch, wherein the active oil replenishment device 5 includes a throttle joint 6 and a replenishment check valve 7. The oil outlet of the hydraulic pump assembly 1 is connected to the oil inlet of the throttle joint 6 via ports P and MP. The oil outlet of the throttle joint 6 is connected to the oil inlet of the replenishment check valve 7. The oil outlet of the replenishment check valve 7 is connected to port B of the motor 4. The overload replenishment valve assembly 12 includes an overload replenishment valve 121, a third check valve 123, and a fifth check valve 125. The oil inlet of the second check valve 122 is connected to the oil circuit between port A of the motor 4 and the balance valve assembly 11. The oil outlet of the second check valve 122 is connected to the oil inlet of the overload replenishment valve 121. The oil outlet of the overload replenishing valve 121 is connected to the oil inlet of the fourth check valve 124. The oil outlet of the fourth check valve 124 is connected to the oil passage between the B port of the motor 4 and the balance valve group 11. The overload replenishing valve group 12 also includes a fourth check valve 122 and a sixth check valve 124. The oil inlet of the fourth check valve 122 is connected to the oil passage between the B port of the motor 4 and the balance valve group 11. The oil outlet of the fourth check valve 122 is connected to the oil inlet of the overload replenishing valve 121. The oil outlet of the overload replenishing valve 121 is connected to the oil inlet of the sixth check valve 124. The oil inlet of the sixth check valve 124 is connected to the oil passage between the A port of the motor 4 and the balance valve group 11.

[0069] When applying:

[0070] When the high-pressure oil output by the hydraulic pump group 1 is reduced by the throttle joint 6 of the active oil replenishment device 5, the hydraulic oil pressure flowing into the oil circuit of the control valve group 3 is less than the opening pressure of the balance valve 11, and the overflow valve 10 and the overload replenishment valve 12 are always in the closed state.

[0071] The set value of relief valve 121 is generally the highest pressure of the system. When the pressure of one oil circuit is higher than the set pressure of relief valve 121, relief valve 121 opens, and hydraulic oil flows from one oil circuit through the third check valve 123, relief valve 121, and fifth check valve 125 into the three oil circuits. At this time, the pressure of one oil circuit is high, and the sixth check valve 124 cannot open.

[0072] When the pressure in the three oil circuits is higher than the set pressure of the relief valve 121, the relief valve 121 opens, and the hydraulic oil flows from the three oil circuits through the fourth check valve 122, the relief valve 121, and the sixth check valve 124 into the first oil circuit. At this time, the pressure in the three oil circuits is high, and the fifth check valve 125 cannot open.

[0073] Example 3:

[0074] Example 3 is basically the same as Example 1, except that:

[0075] An active oil replenishment hydraulic system for an anchor winch, wherein the throttle connector 6 is connected to the MP port of the control valve assembly 3, and the oil outlet of the check valve 7 is connected to the MB port of the control valve assembly 3; the diameter of the damping orifice of the throttle connector 6 is calculated according to the required oil replenishment amount of the motor 4 using the following formula: Where Q represents flow rate, and C represents flow rate. q ρ is the flow coefficient, A0 is the cross-sectional area of ​​the channel, Δp is the pressure difference, and ρ is the fluid density.

[0076] When applying:

[0077] The oil replenishment device uses a throttling connector. By changing the diameter of the throttling orifice, the oil replenishment amount can be adjusted, thus solving the problems of insufficient oil replenishment and inability to replenish oil before the motor starts, which are present in passive oil replenishment. When the anchor winch hydraulic system has not been running for a long time, hydraulic oil leakage caused by motor and valve sealing problems can lead to insufficient oil in the hydraulic system. At this time, operating the manual valve can easily cause the motor to run away. However, the active oil replenishment system can replenish oil to the system after the hydraulic pump station is started, effectively solving problems such as motor runaway.

[0078] The above description is only a preferred embodiment of the present invention. The scope of protection of the present invention is not limited to the above embodiments. Any equivalent modifications or changes made by those skilled in the art based on the content disclosed in the present invention should be included within the scope of protection set forth in the claims.

Claims

1. An active hydraulic replenishment system for anchor winches, characterized in that: The active oil replenishment hydraulic system for the anchor winch includes a hydraulic pump group (1), a hydraulic oil tank assembly (2), a control valve group (3), a motor (4), an active oil replenishment device (5), and a return oil check valve (8). The oil outlet of the hydraulic oil tank assembly (2) is connected to the oil inlet of the hydraulic pump assembly (1), the oil outlet of the hydraulic pump assembly (1) is connected to the MP port of the control valve assembly (3), the oil outlet of the control valve assembly (3) is connected to the A port of the motor (4), the B port of the motor (4) is connected to the MB port of the active oil replenishment device (5), the B port of the motor (4) is connected to the oil inlet of the return oil check valve (8), and the oil outlet of the return oil check valve (8) is connected to the oil inlet of the hydraulic pump assembly (1). The control valve group (3) includes a reversing valve (9), a load-sensitive valve (91), a relief valve (10), a balance valve group (11), and an overload replenishment valve group (12); The oil inlet of the load-sensitive valve (91) is connected to the oil outlet of the hydraulic pump group (1), the oil outlet of the load-sensitive valve (91) is connected to the P port of the reversing valve (9), the B port of the reversing valve (9) is connected to the oil inlet of the balance valve group (11), the oil outlet of the balance valve group (11) is connected to the oil inlet of the overload replenishing valve group (12), and the oil inlet of the overload replenishing valve group (12) is connected to the A port of the motor (4). The B port of the motor (4) is connected to the A port of the reversing valve (9), and the T port of the reversing valve (9) is connected to the oil inlet of the return oil check valve (8). The overflow valve (10) is connected to the reversing valve (9); The active oil replenishment device (5) includes a throttle connector (6) and an oil replenishment check valve (7). The oil outlet of the hydraulic pump group (1) is connected to the oil inlet of the throttle connector (6) via the P port and the MP port. The oil outlet of the throttle connector (6) is connected to the oil inlet of the oil replenishment check valve (7). The oil outlet of the oil replenishment check valve (7) is connected to the B port of the motor (4).

2. The active hydraulic replenishment system for an anchor winch according to claim 1, characterized in that: When the hydraulic oil in the balance valve group (11) flows from port A to port B, the balance valve group (11) functions as an overflow valve; when the hydraulic oil flows from port B to port A, the balance valve group (11) functions as a one-way valve. The B port of the balance valve assembly (11) is connected to the B port of the reversing valve (9); The A port of the balance valve assembly (11) is connected to the A port of the motor (4).

3. The active hydraulic replenishment system for an anchor winch according to claim 2, characterized in that: The pilot end of the balance valve assembly (11) is connected to port B of the motor (4).

4. The active hydraulic replenishment system for an anchor winch according to claim 1, characterized in that: The overload replenishing valve assembly (12) includes an overload replenishing valve (121), a third check valve (123), and a fifth check valve (125). The oil inlet of the second check valve (122) is connected to the oil circuit between port A of the motor (4) and the balance valve assembly (11). The oil outlet of the second check valve (122) is connected to the oil inlet of the overload replenishing valve (121). The oil outlet of the overload replenishing valve (121) is connected to the oil inlet of the fourth check valve (122). The oil outlet of the fourth check valve (122) is connected to the oil circuit between port B of the motor (4) and the balance valve assembly (11).

5. The active hydraulic replenishment system for an anchor winch according to claim 4, characterized in that: The overload replenishing valve group (12) also includes a fourth check valve (122) and a sixth check valve (124). The oil inlet of the fourth check valve (122) is connected to the oil circuit between port B of the motor (4) and the balance valve group (11). The oil outlet of the fourth check valve (122) is connected to the oil inlet of the overload replenishing valve (121). The oil outlet of the overload replenishing valve (121) is connected to the oil inlet of the sixth check valve (124). The oil inlet of the sixth check valve (124) is connected to the oil circuit between port A of the motor (4) and the balance valve group (11).

6. The active oil replenishment hydraulic system for an anchor winch according to claim 5, characterized in that: The oil circuit between port B of the motor (4) and the balance valve group (11) is a single oil circuit, and the oil circuit between port A of the motor (4) and the balance valve group (11) is a triple oil circuit.

7. The active hydraulic replenishment system for an anchor winch according to claim 1, characterized in that: The oil inlet of the overflow valve (10) is connected to the high pressure port of the reversing valve (9), and the oil outlet of the overflow valve (10) is connected to the T port of the control valve group (3).

8. The active hydraulic replenishment system for an anchor winch according to claim 1, characterized in that: The throttle connector (6) is connected to the MP port of the control valve group (3), and the oil outlet of the check valve (7) is connected to the MB port of the control valve group (3).

9. The active oil replenishment hydraulic system for an anchor winch according to claim 8, characterized in that: The diameter of the damping orifice of the throttle connector (6) is calculated according to the required oil replenishment amount of the motor (4) using the following formula: Where Q represents flow rate, and C represents flow rate. q ρ is the flow coefficient, A0 is the cross-sectional area of ​​the channel, Δp is the pressure difference, and ρ is the fluid density.

10. The active oil replenishment hydraulic system for an anchor winch according to claim 1, characterized in that: The oil circuit between the return oil check valve (8) and the hydraulic oil tank assembly (2) is a four-way oil circuit; The oil circuit between the return oil check valve (8) and the active oil replenishment device (5) is a dual oil circuit.

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