A method for turning on an amplification oil passage

Abstract

This invention provides a method for amplifying the conduction of an oil circuit. When the actuator and the variable pump station are connected, the actuator outputs signal oil to the signal amplifier. The actuator outputs a feedback signal to put the variable pump station into a load state. Then, the hydraulic oil output from the variable pump station is input to the feedback terminal of the variable pump station to generate a load signal. This increases the output of hydraulic oil in the variable pump station. Consequently, when the actuator is started, the output of hydraulic oil in the oil circuit is increased, thereby increasing the oil pressure and flow rate of the hydraulic oil input to the actuator.

Description

Technical Field

[0001] This invention relates to the field of hydraulics, and more specifically to a method for amplifying the conduction of an oil circuit. Background Technology

[0002] Various actuators are driven by multi-way valves, which in turn drive the actuators to move in different directions. Chinese patent application No. 201810521144.X, published on October 16, 2018, discloses a three-position, five-way load port independent control multi-way valve with a Y-type center position function. Each section of this valve includes a pressure compensator, two three-position, five-way directional valves, two three-way pressure reducing valves, and a check valve. The component connections in each section are identical, and all sections share a unified inlet oil line P, return oil line T, and load feedback oil line LS. The pressure reducing valves output corresponding pressure to control the opening degree of the two directional valves, thereby controlling the speed and direction of the actuators.

[0003] When the multi-way valve drives the pressure compensator to switch directions, it needs to detect whether the pressure of the actuator has reached the maximum load pressure. If the maximum load pressure is not reached, the load oil circuit is cut off from the pressure compensator, and no feedback signal can be transmitted. Consequently, when the pressure compensator outputs hydraulic oil, it cannot guarantee that there will be a feedback signal output. Summary of the Invention

[0004] This invention provides a method for amplifying the conduction of an oil circuit, which increases the output of hydraulic oil in the oil circuit when the actuator is started.

[0005] To achieve the above objectives, the technical solution of the present invention is: a method for amplifying the conduction of an oil circuit, comprising the following steps:

[0006] S1. The directional valve reverses in one direction, and the output of the variable pump station outputs hydraulic oil to the actuator.

[0007] S2. When the actuator receives hydraulic oil, the actuator outputs signal oil to the signal amplifier, which then turns on the signal amplifier.

[0008] S3. The hydraulic oil output from the output end of the variable pump station flows through the signal amplifier and is input to the feedback end of the variable pump station.

[0009] S4. The output of the variable pump station increases the output of hydraulic oil input to the actuator.

[0010] In the above method, when the actuator and the variable pump station are connected, the actuator outputs signal oil to the signal amplifier. The actuator outputs a feedback signal to put the variable pump station into a load state. Then, the hydraulic oil output from the variable pump station is input to the feedback terminal of the variable pump station, generating a load signal. This causes the variable pump station to increase the output of hydraulic oil. Consequently, when the actuator is started, the output of hydraulic oil in the oil circuit is increased, resulting in an increase in both the oil pressure and flow rate of the hydraulic oil input to the actuator.

[0011] Furthermore, the amplification circuit includes a variable pump station, an actuator, and a signal amplifier. The input end of the variable pump station is connected to the oil tank, and the output end of the variable pump station is connected to the input ends of the actuator and the signal amplifier. The actuator is connected to the control end of the signal amplifier, and the output end of the signal amplifier is connected to the feedback end of the variable pump station. When hydraulic oil is input to the actuator, the actuator outputs signal oil to activate the signal amplifier. The hydraulic oil output from the output end of the variable pump station is input to the feedback end of the variable pump station through the signal amplifier.

[0012] The above setup connects the control terminal of the signal amplifier to the actuator, so that when the actuator receives hydraulic oil, it can quickly output signal oil to the signal amplifier; thus enabling the feedback terminal of the variable pump station to receive feedback signals.

[0013] The signal amplifier connects the actuator and the variable pump station. When the actuator operates, the variable pump station outputs hydraulic oil to the actuator. When the actuator receives the hydraulic oil, it outputs signal oil to the signal amplifier. This causes the signal amplifier to conduct, connecting its input and output terminals. Consequently, the hydraulic oil output from the variable pump station is fed into its feedback terminal, generating a load signal. This causes the variable pump station to increase its hydraulic oil output. As the hydraulic oil output between the variable pump station and the actuator increases, both the oil pressure and flow rate increase, shortening the time it takes for the hydraulic oil to travel from the variable pump station to the actuator. This reduces the reaction time between the variable pump station and the actuator, enabling rapid response. Simultaneously, it increases the output hydraulic oil displacement, allowing the actuator to operate at full load at maximum speed with high reliability.

[0014] Furthermore, the actuators include a directional valve and a winch; one end of the directional valve is connected to the output end of the variable pump station, and the other end of the directional valve is connected to the winch; a first relief valve and a first check valve are provided between the directional valve and the winch; the input end of the first check valve is connected to the directional valve, and the output end of the first check valve is connected to the winch; the output end and control end of the first relief valve are connected to the directional valve, and the input end of the first relief valve is connected to the winch.

[0015] With the above settings, hydraulic oil is input into the actuator to drive the winch, resulting in a simple oil circuit.

[0016] Furthermore, the actuators also include a first shuttle valve, a first pressure reducing valve, and a normally closed brake; the input end of the first shuttle valve is connected to the output end of the variable pump station, the output end of the first shuttle valve is connected to the input end of the first pressure reducing valve, and the output end of the first pressure reducing valve is connected to the cylinder of the normally closed brake; the brake disc of the normally closed brake acts on the winch.

[0017] The above setup uses a normally closed brake to brake the winch. When the winch needs to be driven, a portion of the hydraulic oil output from the P port of the directional valve flows into the first shuttle valve, then through the first pressure reducing valve and into the normally closed brake, thus releasing the brake on the winch. This setup is highly reliable. When the directional valve returns to the neutral position, the hydraulic oil input stops, and the hydraulic oil flows back from the cylinder of the normally closed brake to the directional valve.

[0018] Furthermore, the steps following S4 include:

[0019] S5. The hydraulic oil output from the variable pump station flows from the P port of the directional valve to the B2 port of the directional valve of the multi-way valve, and then flows into the actuator.

[0020] S6. A portion of the hydraulic oil output from port B2 of the reversing valve flows into the first shuttle valve, and then flows through the first pressure reducing valve to the normally closed brake, opening the normally closed brake and releasing the winch from the brake.

[0021] S7. Another portion of the hydraulic oil output from port B2 of the reversing valve flows through the first check valve into the winch, and then flows from port A2 of the reversing valve to port T of the reversing valve, so that the winch moves in one direction.

[0022] S8. If it is necessary to drive the winch to move in another direction, then proceed to S9.

[0023] S9, the reversing valve reverses in another direction;

[0024] S10. The hydraulic oil output from the variable pump station flows from the P port of the directional valve to the A2 port of the directional valve of the multi-way valve, and then flows into the actuator 0.

[0025] S11. Hydraulic oil is input into the winch, and at the same time, the hydraulic oil flows into the control end of the first relief valve, which makes the first relief valve open. The hydraulic oil output from the winch flows from port B2 of the reversing valve to port T of the reversing valve through the first relief valve, so that the winch moves in another direction.

[0026] The above method increases the output of hydraulic oil by using a variable pump station, thereby increasing the flow rate and pressure of hydraulic oil in the oil circuit. As a result, the winch can operate at full load at maximum speed when moving in different directions, ensuring high reliability.

[0027] Furthermore, a hydraulic check valve is connected between the input end of the variable pump station and the actuator.

[0028] The above settings, by using a hydraulically controlled check valve, prevent hydraulic oil from flowing back from the input end of the variable pump station into the variable pump station.

[0029] Furthermore, the output of the variable pump station is also connected to the oil tank via a second overflow valve.

[0030] The above setup connects the output of the variable pump station to the oil tank via a second relief valve. When the actuator stops operating, the second relief valve opens, allowing the hydraulic oil output from the variable pump station to flow back to the oil tank, thus unloading the load. Attached Figure Description

[0031] Figure 1 This is a hydraulic schematic diagram of the oil supply to the actuator of the present invention.

[0032] Figure 2 This is a hydraulic schematic diagram of the actuator in this invention.

[0033] Figure 3 This is a flowchart of the present invention. Detailed Implementation

[0034] like Figure 1-3 As shown, a method for activating an amplified oil circuit is described. The amplified oil circuit includes a variable pump station 1, an actuator 2, and a signal amplifier 3. The input end of the variable pump station 1 is connected to the oil tank 4, and the output end of the variable pump station 1 is connected to the input ends of the actuator 2 and the signal amplifier 3. The actuator 2 is connected to the control end of the signal amplifier 3, and the output end of the signal amplifier 3 is connected to the feedback end of the variable pump station 1. When hydraulic oil is input to the actuator 2, the actuator 2 outputs signal oil to activate the signal amplifier 3. The hydraulic oil output from the output end of the variable pump station 1 is input to the feedback end of the variable pump station 1 through the signal amplifier 3.

[0035] The actuator 2 includes a reversing valve 21 and a winch 22; one end of the reversing valve 21 is connected to the output end of the variable pump station 1, and the other end of the reversing valve 21 is connected to the winch 22; a first relief valve 23 and a first check valve 24 are provided between the reversing valve 21 and the winch 22; the input end of the first check valve 24 is connected to the reversing valve 21, and the output end of the first check valve 24 is connected to the winch 22; the output end and control end of the first relief valve 23 are connected to the reversing valve 21, and the input end of the first relief valve 23 is connected to the winch 22.

[0036] In this embodiment, the directional control valve 21 is a three-position, six-way mechanical directional control valve 21. It is connected to the winch 22. When the directional control valve 21 moves in one direction, the hydraulic oil output from the variable pump station 1 flows into the directional control valve 21. The hydraulic oil flows from port P to port B2 of the directional control valve 21, then flows through the first check valve 24 and into the winch 22. It then flows from port A2 to port T of the directional control valve 21, thus enabling the winch 22 to move in one direction. Simultaneously, the hydraulic oil also flows from port K1 to port K2 of the directional control valve 21, then flows through the LS oil circuit to the control terminal of the signal amplifier 3. When the directional control valve 21 moves in the other direction, the hydraulic oil output from the variable pump station 1 flows into the directional control valve 21. 1. Hydraulic oil flows from port P of directional valve 21 to port A2 of directional valve 21, and is input into winch 22. At the same time, hydraulic oil flows into the control end of the first relief valve 23, causing the first relief valve 23 to open. The hydraulic oil output from winch 22 flows from port B2 of directional valve 21 to port T of directional valve 21 through the first relief valve 23, realizing the winch 22 moving in another direction. At the same time, hydraulic oil also flows from port K1 of directional valve 21 to port K2 of directional valve 21, and then flows through the LS oil circuit to the control end of signal amplifier 3. When winch 22 moves in different directions, directional valve 21 will output a signal oil to signal amplifier 3; the reliability is good.

[0037] The actuator 2 further includes a first shuttle valve 25, a first pressure reducing valve 26, and a normally closed brake 27. The input end of the first shuttle valve 25 is connected to the output end of the variable pump station 1, the output end of the first shuttle valve 25 is connected to the input end of the first pressure reducing valve 26, and the output end of the first pressure reducing valve 26 is connected to the cylinder of the normally closed brake 27. The brake disc of the normally closed brake 27 acts on the winch 22. The winch 22 is braked by the normally closed brake 27. When the winch 22 needs to be driven, a portion of the hydraulic oil output from the P port of the reversing valve 21 flows into the first shuttle valve 25, and then flows through the first pressure reducing valve 26 to be input into the normally closed brake 27, so that the normally closed brake 27 releases the brake on the winch 22, which has good reliability. When the reversing valve 21 is reset to the neutral position, the hydraulic oil input stops; the hydraulic oil flows back from the cylinder of the normally closed brake 27 to the reversing valve 21.

[0038] In this embodiment, a hydraulically controlled check valve 5 is connected between the input end of the variable pump station 1 and the actuator 2. By setting the hydraulically controlled check valve 5, hydraulic oil is prevented from flowing back from the input end of the variable pump station 1 into the variable pump station 1. The output end of the variable pump station 1 is also connected to the oil tank 4 through a second relief valve 6. By setting the second relief valve 6 to connect the output end of the variable pump station 1 and the oil tank 4, when the actuator 2 stops operating, the second relief valve 6 is opened, and the hydraulic oil output from the output end of the variable pump station 1 flows back to the oil tank 4 through the second relief valve 6, thereby achieving unloading.

[0039] In this embodiment, the initial output flow rate and the load output flow rate of the hydraulic oil are set, and the load output flow rate is greater than the initial output flow rate. When the variable pump station starts, the flow rate of the hydraulic oil output by the variable pump station is the initial output flow rate. After the feedback signal is input to the feedback terminal of the variable pump station through the signal amplifier, the flow rate of the hydraulic oil output by the variable pump station is the load output flow rate.

[0040] The method for improving the conductivity of the oil circuit includes the following steps:

[0041] S1. The directional valve reverses in one direction, and the output of the variable pump station outputs hydraulic oil to the actuator.

[0042] S2. When the actuator receives hydraulic oil, the actuator outputs signal oil to the signal amplifier, which then turns on the signal amplifier.

[0043] S3. The hydraulic oil output from the output end of the variable pump station flows through the signal amplifier and is input to the feedback end of the variable pump station.

[0044] S4. The output of the variable pump station increases the output of hydraulic oil input to the actuator.

[0045] S5. The hydraulic oil output from the variable pump station flows from the P port of the directional valve to the B2 port of the directional valve of the multi-way valve, and then flows into the actuator.

[0046] S6. A portion of the hydraulic oil output from port B2 of the reversing valve flows into the first shuttle valve, and then flows through the first pressure reducing valve to the normally closed brake, opening the normally closed brake and releasing the winch from the brake.

[0047] S7. Another portion of the hydraulic oil output from port B2 of the reversing valve flows through the first check valve into the winch, and then flows from port A2 of the reversing valve to port T of the reversing valve, so that the winch moves in one direction.

[0048] S8. If it is necessary to drive the winch to move in another direction, then proceed to S9.

[0049] S9, the reversing valve reverses in another direction;

[0050] S10. The hydraulic oil output from the variable pump station flows from the P port of the directional valve to the A2 port of the directional valve of the multi-way valve, and then flows into the actuator 0.

[0051] S11. Hydraulic oil is input into the winch, and at the same time, the hydraulic oil flows into the control end of the first relief valve, which makes the first relief valve open. The hydraulic oil output from the winch flows from port B2 of the reversing valve to port T of the reversing valve through the first relief valve, so that the winch moves in another direction.

[0052] In the above method, when the actuator and the variable pump station are connected, the actuator outputs signal oil to the signal amplifier. The actuator outputs a feedback signal, causing the variable pump station to enter a load state. Consequently, the hydraulic oil output from the variable pump station is input to its feedback terminal, generating a load signal. This causes the variable pump station to increase its hydraulic oil output, which in turn increases the hydraulic oil output in the oil circuit when the actuator is started. This results in increased oil pressure and flow rate of the hydraulic oil input to the actuator. By increasing the hydraulic oil output through the variable pump station, and increasing the flow rate and pressure of the hydraulic oil in the oil circuit, the winch can operate at full load at maximum speed in different directions, ensuring high reliability.

Claims

1. A method of enabling an amplification oil passage, characterized by: The amplified hydraulic circuit includes a variable displacement pump station, an actuator, and a signal amplifier. The input of the variable displacement pump station is connected to the oil tank, and its output is connected to the inputs of the actuator and the signal amplifier. The actuator is connected to the control terminal of the signal amplifier, and the output of the signal amplifier is connected to the feedback terminal of the variable displacement pump station. When hydraulic oil is input to the actuator, the actuator outputs signal oil to activate the signal amplifier. The hydraulic oil output from the variable displacement pump station is then input to the feedback terminal of the variable displacement pump station via the signal amplifier. The actuator includes a directional valve and a winch. One end of the directional valve is connected to the output of the variable displacement pump station, and the other end of the directional valve... The first end is connected to the winch; a first relief valve and a first check valve are provided between the reversing valve and the winch; the input end of the first check valve is connected to the reversing valve, and the output end of the first check valve is connected to the winch; the output end and control end of the first relief valve are connected to the reversing valve, and the input end of the first relief valve is connected to the winch; the actuator also includes a first shuttle valve, a first pressure reducing valve, and a normally closed brake; the input end of the first shuttle valve is connected to the output end of the variable pump station, the output end of the first shuttle valve is connected to the input end of the first pressure reducing valve, and the output end of the first pressure reducing valve is connected to the cylinder of the normally closed brake; the brake disc of the normally closed brake acts on the winch; Includes the following steps: S1. The directional valve reverses in one direction, and the output of the variable pump station outputs hydraulic oil to the actuator; S2. When the actuator receives hydraulic oil, the actuator outputs signal oil to the signal amplifier, thus turning on the signal amplifier; S3. The hydraulic oil output from the output end of the variable pump station flows through the signal amplifier and is input to the feedback end of the variable pump station. S4. The output of the variable pump station increases the output of the hydraulic oil input to the actuator; S4 is followed by the following steps: S5. The hydraulic oil output from the variable pump station flows from the P port of the directional valve to the B2 port of the directional valve of the multi-way valve, and then flows into the actuator. S6. A portion of the hydraulic oil output from port B2 of the reversing valve flows into the first shuttle valve, and then flows through the first pressure reducing valve to the normally closed brake, opening the normally closed brake and releasing the winch from the brake. S7. Another portion of the hydraulic oil output from port B2 of the reversing valve flows through the first check valve into the winch, and then flows from port A2 of the reversing valve to port T of the reversing valve, so that the winch moves in one direction. S8. If it is necessary to drive the winch to move in another direction, then proceed to S9. S10, The reversing valve reverses in the other direction; S11. The hydraulic oil output from the variable pump station flows from the P port of the reversing valve to the A2 port of the reversing valve of the multi-way valve, and then flows into the actuator. S12. Hydraulic oil is input into the winch, and at the same time, the hydraulic oil flows into the control end of the first relief valve, which makes the first relief valve open. The hydraulic oil output from the winch flows from port B2 of the reversing valve to port T of the reversing valve through the first relief valve, so that the winch moves in another direction.

2. The method of claim 1, wherein: A hydraulically controlled check valve is connected between the input end of the variable pump station and the actuator.

3. The method of claim 1, wherein: The output of the variable pump station is also connected to the oil tank via a second overflow valve.

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