Integrated two-way cartridge valve hydraulic control device based on flow control

Abstract

The invention belongs to the technical field of two-way cartridge valves, and particularly relates to an integrated two-way cartridge valve hydraulic control device based on flow control, which comprises a main valve and a pilot electromagnetic valve, the main valve comprises a main valve oil inlet, a main valve sleeve, a main valve oil outlet, a main valve core, a main valve damper, a main valve spring, a cover gasket and a screw sleeve, the pilot electromagnetic valve comprises an intelligent control system; the pilot electromagnetic valve comprises a pilot valve, a pilot valve sleeve, a pilot valve core, a pilot spring, an armature, a coil, a flux sleeve, a pilot damper, a pilot valve oil inlet and a pilot valve oil return port, and the device solves the problems that an existing two-way cartridge valve is large in occupied space, a control part is complex in structure and inconvenient to maintain, the workload of maintenance personnel is increased, and the maintenance cost is reduced. And when the oil release amount is controlled through the pilot electromagnetic valve, closing is not timely due to the influence of the oil liquidity and the pilot spring, the closing time cannot be pre-calculated, and therefore too much or little oil is released.

Description

Technical Field

[0001] The invention belongs to the technical field of two-way cartridge valves, and in particular relates to an integrated two-way cartridge valve hydraulic control device based on flow control. Background Art

[0002] At present, most of the two-way cartridge valves used in hydraulic machinery adopt a structure of a cartridge valve plus a control cover plate plus a plate-type solenoid valve. The control cover plate requires at least four screws for installation, has a large size, occupies more space, and has a high processing cost. The plate-type solenoid valve is large in size, which increases the weight of the product, has a complex structure, and has a large overall size and occupies a large space. The control part has a complex structure and is not easy to maintain, which increases the workload of maintenance personnel. It also has high requirements for the cleanliness of the oil, resulting in a high failure rate and inconvenient maintenance. Moreover, when the valve is closed by the pilot solenoid valve, due to the influence of the viscosity of the oil, the ambient temperature and the fatigue of the spring, the valve closing time cannot be accurately controlled, resulting in excessive or insufficient oil release. Summary of the invention

[0003] The object of the present invention is to provide an integrated two-way cartridge valve hydraulic control device based on flow control to solve the problems raised in the above background technology.

[0004] In order to solve the above technical problems, the present invention provides the following technical solutions: an integrated two-way cartridge valve hydraulic control device based on flow control, comprising a main valve and a pilot solenoid valve, the main valve comprising a main valve oil inlet, a main valve sleeve, a main valve oil outlet, a main valve core, a main valve damping, a main valve spring, a cover gasket and a screw sleeve, the pilot solenoid valve comprising an intelligent control system; the pilot solenoid valve comprises a pilot valve, a pilot valve sleeve, a pilot valve core, a pilot spring, an armature, a coil, a magnetic sleeve, a pilot damping, a pilot valve oil inlet and a pilot valve oil return port, the pilot valve is threadedly connected to the top of the screw sleeve, the main valve oil inlet is arranged below the main valve sleeve, the main valve oil outlet is arranged on the left and right sides of the main valve sleeve, the main valve core, the main valve damping and the main valve spring are all installed in the axial hole of the main valve core, and the main valve spring is located above the main valve damping, the cover The gasket is sleeve-mounted on the other end of the main valve sleeve, the screw sleeve is fixedly mounted on the upper end of the cover gasket, the pilot solenoid valve is fixedly mounted axially above the screw sleeve, the hole of the main valve core is connected with the oil inlet of the pilot valve through the middle hole of the cover gasket, the hole of the pilot damping is arranged in the axial direction of the screw sleeve, the pilot valve return port and the pilot valve oil outlet are respectively arranged on the side of the pilot valve sleeve, the pilot valve core is installed in the axial hole of the pilot valve sleeve, one end of the pilot valve sleeve is connected with the oil inlet of the pilot valve, and the other end is connected with the magnetic sleeve, one end of the pilot valve core is fixedly connected with the armature, and the armature is arranged in the axial hole of the magnetic sleeve, the pilot spring is arranged between the armature and the magnetic sleeve, the coil is sleeved on the axial outer diameter of the magnetic sleeve, and is used to achieve the effect of hydraulic control of a large-flow pilot structure, and the pilot solenoid valve is a proportional leakage-free solenoid valve.

[0005] The present invention further illustrates that the intelligent control system includes a viscosity identification module, a reset ability identification module and a pre-closing module; the reset ability identification module and the viscosity identification module are both electrically connected to the pre-closing module, the viscosity identification module is used to identify the viscosity of the oil, the reset ability identification module is used to identify the reset ability of the pilot spring, and the pre-closing module is used to control the pre-closing time of the pilot solenoid valve.

[0006] The present invention further illustrates that the viscosity identification module includes an oil viscosity unit and a temperature unit; the oil viscosity unit is electrically connected to the temperature unit, the oil viscosity unit is used to record the original viscosity data of the oil, and the temperature unit is used to identify the working environment temperature.

[0007] The present invention further illustrates that the operation steps of the intelligent control system include: step S1, the two-way cartridge valve hydraulic control device operates, and the intelligent control system operates; step S2, the viscosity of the oil is identified by the viscosity identification module, and the oil viscosity unit records the original viscosity data of the oil, and the temperature unit identifies the working environment, so as to judge the real viscosity of the oil and obtain the first pre-closing time; step S3, the reset ability of the pilot spring is identified by the reset ability identification module, and its reset ability is calculated according to the number of closing times of the pilot spring to obtain the second pre-closing time, when the reset ability of the pilot spring is reduced to a certain value, enter step S4, otherwise enter step S5; step S4, combine the reset ability of the pilot spring with the real viscosity of the oil to obtain the third pre-closing time; step S5, control the pre-closing time of the pilot solenoid valve according to the second and third pre-closing times.

[0008] The present invention further illustrates that in step S2, the first pre-closing time is: T1 = T + T 流 , μ=μ0*20.1(t0-t), T1 is the first pre-closing time, T is the pre-closing time under normal oil viscosity, T 流 is the pre-closing time required under the influence of oil viscosity, μ is the oil viscosity at ambient temperature, μ0 is the oil viscosity at a specific temperature, t0 is the temperature under normal fluidity of the oil, t is the ambient temperature, μ max The minimum ambient temperature of the two-way cartridge valve hydraulic control device, T max It is the pre-closing time at the highest oil temperature; that is, the lower the ambient temperature, the lower the oil viscosity, and the longer the pre-closing time.

[0009] The present invention further illustrates that in step S3, T2=T+T 流 +T 弹 , S is the fatigue degree of the pilot spring, N is the number of times the pilot spring is stretched, S max is the normal fatigue degree of the pilot spring, T 弹 is the time from the deformation of the pilot spring to its reset, T max is the time from deformation to reset when the pilot spring is initially stretched, and T2 is the additional time required for pre-closing under the action of the pilot spring; that is, the more times the pilot spring is used, the worse its reset ability is, and the longer the closing process time is. Substitute it into the pre-closing time to obtain the second pre-closing time.

[0010] The present invention further illustrates that in step S3: when S=S1, S1 is the maximum fatigue degree of the pilot spring: F is the resistance of the oil to the main valve core, F max is the maximum resistance of the oil to the main valve core, F1 is the force exerted by the pilot spring on the oil through the main valve core, Smin is the initial fatigue degree of the pilot spring, F1 max is the maximum force exerted on the oil by the pilot spring through the main spool, F2 max is the maximum force that cancels each other out between the main spool and the oil, T 1max is the maximum time required for the pilot spring to return during the interaction between the main spool and the oil, that is is the time required for the pilot spring to return after being acted on by the oil force. T3 is the third pre-closure time; when S < S1: T2 = T + T 流 +T 弹 ; that is, when the fatigue degree of the pilot spring reaches the highest, the third pre-closure time is adopted, otherwise the second pre-closure time is adopted.

[0011] The present invention further illustrates that in the steps S3 and S4: when S = S1: the third pre-closure time is adopted, and the pre-closure time is further increased; when S < S1: the second pre-closure time is adopted, and the pre-closure time is relatively shortened.

[0012] Compared with the prior art, the beneficial effects achieved by the present invention are as follows: when the two-way cartridge valve hydraulic control device of the present invention is in use, the ambient temperature affects the viscosity of the oil. When the oil flows through the two-way cartridge valve hydraulic control device, a small amount of oil does not pass through after the main spool is closed, resulting in inaccurate oil volume during the quantitative release of the oil. Therefore, by increasing the closing time, it is ensured that the oil can fully pass through the main spool, that is, to ensure the accuracy of the oil flow rate. And during the deformation process of the pilot spring, with repeated stretching and resetting, its fatigue degree increases, and the time spent on resetting increases, thus further increasing the pre-closure time to take into account the reset ability of the pilot spring and further improving the accuracy of the oil volume during the quantitative release of the oil;

[0013] In the case of a high fatigue degree of the pilot spring, when the main spool is closed, the force exerted on the oil needs to increase. And due to the high fatigue degree of the pilot spring, more time is required during closing. Therefore, the pre-closure time is further advanced, thereby further controlling the oil volume of the quantitative release and accurately controlling the release volume. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The drawings are used to provide a further understanding of the present invention and constitute a part of the specification. They are used together with the embodiments of the present invention to explain the present invention and do not constitute a limitation to the present invention. In the drawings:

[0015] Figure 1 is the overall structural schematic diagram of the present invention;

[0016] Figure 2 is the schematic plan view of the hydraulic control system of the proportional non-leakage solenoid valve of the present invention;

[0017] Figure 3 It is a schematic diagram of the module connection relationship of the intelligent control system of the present invention;

[0018] In the figure: 1. main valve sleeve; 2. main valve core; 3. main valve spring; 4. cover gasket; 5. screw sleeve; 6. pilot valve oil inlet; 7. pilot valve sleeve; 8. pilot valve core; 8. armature; 10. pilot spring; 11. coil; 12. magnetic sleeve; 13. pilot valve; 14. pilot damping; 15. pilot valve oil return port; 16. main valve oil outlet; 17. main valve damping; 18. main valve oil inlet. DETAILED DESCRIPTION

[0019] The following is a further non-limiting detailed description of the technical solution of the present invention in conjunction with the preferred embodiments and the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0020] See also Figure 1-3 The present invention provides a technical solution: an integrated two-way cartridge valve hydraulic control device based on flow control, including a main valve and a pilot solenoid valve, the main valve including a main valve oil inlet 18, a main valve sleeve 1, a main valve oil outlet 16, a main valve core 2, a main valve damping 17, a main valve spring 3, a cover gasket 4 and a screw sleeve 5, and the pilot solenoid valve includes an intelligent control system;

[0021] The pilot solenoid valve comprises a pilot valve 13, a pilot valve sleeve 7, a pilot valve core 8, a pilot spring 10, an armature 9, a coil 11, a magnetic sleeve 12, a pilot damper 14, a pilot valve oil inlet 6 and a pilot valve oil return port 15. The pilot valve 13 is threadedly connected to the top of the screw sleeve 5, the main valve oil inlet 18 is arranged below the main valve sleeve 1, the main valve oil outlet 16 is arranged on the left and right sides of the main valve sleeve 1, the main valve core 2, the main valve damper 17 and the main valve spring 3 are all installed in the axial hole of the main valve core 2, and the main valve spring 3 is located above the main valve damper 17, the cover gasket 4 is sleeved and installed on the other end of the main valve sleeve 1, the screw sleeve 5 is fixedly installed on the upper end of the cover gasket 4, the pilot solenoid valve is fixedly installed axially above the screw sleeve 5, and the main valve core 2 The hole is connected with the pilot valve oil inlet 6 through the middle hole of the cover gasket 4, the hole of the pilot damping 14 is arranged in the axial direction of the screw sleeve 5, the pilot valve return oil port 15 and the pilot valve oil outlet are respectively arranged on the side of the pilot valve sleeve 7, the pilot valve core 8 is installed in the axial hole of the pilot valve sleeve 7, one end of the pilot valve sleeve 7 is connected with the pilot valve oil inlet 18, and the other end is connected with the magnetic sleeve 12, one end of the pilot valve core 8 is fixedly connected with the armature 9, and the armature 9 is arranged in the axial hole of the magnetic sleeve 12, the pilot spring 10 is arranged between the armature 9 and the magnetic sleeve 12, the coil 11 is sleeved on the axial outer diameter of the magnetic sleeve 12, and is used to achieve the effect of large-flow pilot structure hydraulic control, and the pilot solenoid valve is a proportional leakage-free solenoid valve.

[0022] The intelligent control system includes a viscosity identification module, a reset capability identification module and a pre-closing module;

[0023] The reset capability identification module and the viscosity identification module are both electrically connected to the pre-closing module. The viscosity identification module is used to identify the viscosity of the oil, the reset capability identification module is used to identify the reset capability of the pilot spring 10, and the pre-closing module is used to control the pre-closing time of the pilot solenoid valve.

[0024] The viscosity identification module includes an oil viscosity unit and a temperature unit;

[0025] The oil viscosity unit is electrically connected to the temperature unit. The oil viscosity unit is used to record the original viscosity data of the oil, and the temperature unit is used to identify the working environment temperature.

[0026] The operation steps of the intelligent control system include:

[0027] Step S1, the two-way cartridge valve hydraulic control device is running, and the intelligent control system is running;

[0028] Step S2, identifying the viscosity of the oil through the viscosity identification module, while the oil viscosity unit records the original viscosity data of the oil, and the temperature unit identifies the working environment, thereby determining the actual viscosity of the oil and obtaining the first pre-closing time;

[0029] Step S3, identifying the reset capacity of the pilot spring 10 through the reset capacity identification module, calculating its reset capacity according to the closing times of the pilot spring 10, and obtaining the second pre-closing time, when the reset capacity of the pilot spring 10 is reduced to a certain value, entering step S4, otherwise entering step S5;

[0030] Step S4, combining the reset ability of the pilot spring 10 with the actual viscosity of the oil to obtain a third pre-closing time;

[0031] Step S5: controlling the pre-closing time of the pilot solenoid valve according to the second and third pre-closing times.

[0032] In step S2, the first pre-closing time is: T1 = T + T 流 , μ=μ0*20.1(t0-t), T1 is the first pre-closing time, T is the pre-closing time under normal oil viscosity, T 流 is the pre-closing time required under the influence of oil viscosity, μ is the oil viscosity at ambient temperature, μ0 is the oil viscosity at a specific temperature, t0 is the temperature under normal fluidity of the oil, t is the ambient temperature, μ max The minimum ambient temperature of the two-way cartridge valve hydraulic control device, T max is the pre-closing time at the highest oil temperature;

[0033] That is, the lower the ambient temperature, the lower the oil viscosity, and thus the longer the pre-closing time;

[0034] The ambient temperature affects the viscosity of the oil. When the oil flows through the two-way cartridge valve hydraulic control device, a small amount of oil will not pass through after the main valve core 2 is closed, resulting in inaccurate oil volume when the oil is quantitatively released. Therefore, the closing time is increased to ensure that the oil can fully pass through the main valve core 2, that is, to ensure the accuracy of the oil flow rate.

[0035] In step S3, T2=T+T 流 +T 弹 , S is the fatigue degree of the pilot spring 10, N is the number of times the pilot spring 10 is stretched, S max is the normal fatigue degree of the pilot spring 10, T 弹 is the time from the deformation of the pilot spring 10 to its reset, T max is the time from deformation to reset when the pilot spring 10 is initially stretched, T is the additional time required for pre-closing under the action of the pilot spring 10;

[0036] That is, the more times the pilot spring 10 is used, the worse its reset ability is, and thus the longer the closing process time is, which is substituted into the pre-closing time to obtain the second pre-closing time;

[0037] During the deformation process of the pilot spring 10, with repeated stretching and resetting, its fatigue increases and the time taken for resetting increases, thereby further increasing the pre-closing time to take the resetting ability of the pilot spring 10 into account and further improve the accuracy of the oil volume during quantitative release of oil.

[0038] In step S3:

[0039] When S=S1, S1 is the maximum fatigue degree of the pilot spring 10: F is the resistance of the oil to the main valve core 2, F max is the maximum resistance of the oil to the main valve core 2, F1 is the force exerted by the pilot spring 10 on the oil through the main valve core 2, S min is the initial fatigue degree of the pilot spring 10, F1 max F2 is the maximum force exerted by the pilot spring 10 on the oil through the main valve core 2. max is the maximum force between the main valve core 2 and the oil to offset each other, T 1max The maximum time required for the pilot spring 10 to return to its original position after the interaction between the main valve core 2 and the oil, i.e. is the time required for the pilot spring 10 to reset after being acted upon by the oil, and T3 is the third pre-closing time;

[0040] When S < S1: T2 = T + T 流 + T 弹 ;

[0041] That is, when the fatigue degree of the pilot spring 10 reaches the highest, the third pre-closure time is adopted, and vice versa, the second pre-closure time is adopted;

[0042] In the case of high fatigue degree of the pilot spring 10, when the main spool 2 closes, the acting force on the oil needs to increase. And due to the high fatigue degree of the pilot spring 10, more time is required for closing. Therefore, the pre-closure time is further advanced, so as to further control the quantitatively released oil volume and accurately control the release volume.

[0043] In steps S3 and S4:

[0044] When S = S1: The third pre-closure time is adopted, and the pre-closure time is further increased;

[0045] When S < S1: The second pre-closure time is adopted, and the pre-closure time is relatively shortened;

[0046] By using the data of two groups of pre-closure times to precisely control the closing of the two-way cartridge valve hydraulic control device, the accuracy of the oil release volume can be guaranteed to the greatest extent, and the situation of excessive or less oil release can be avoided.

[0047] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation of the present invention.

[0048] Finally, it should be pointed out that: The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features. And these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. An integrated two-way cartridge valve hydraulic control device based on flow control, comprising a main valve and a pilot solenoid valve, characterized in that: The main valve comprises a main valve oil inlet (18), a main valve sleeve (1), a main valve oil outlet (16), a main valve core (2), a main valve damper (17), a main valve spring (3), a cover gasket (4) and a screw sleeve (5), and the pilot solenoid valve comprises an intelligent control system; The pilot solenoid valve comprises a pilot valve (13), a pilot valve sleeve (7), a pilot valve core (8), a pilot spring (10), an armature (9), a coil (11), a magnetic sleeve (12), a pilot damper (14), a pilot valve oil inlet (6) and a pilot valve oil return port (15); the pilot valve (13) is threadedly connected to the upper part of the screw sleeve (5); the main valve oil inlet (18) is arranged at the lower part of the main valve sleeve (1); and the main valve oil outlet (19) is arranged at the lower part of the main valve sleeve (2). 16) are arranged on the left and right sides of the main valve sleeve (1), the main valve core (2), the main valve damper (17) and the main valve spring (3) are all installed in the axial hole of the main valve core (2), and the main valve spring (3) is located above the main valve damper (17), the cover gasket (4) is sleeved and installed on the other end of the main valve sleeve (1), the screw sleeve (5) is fixedly installed on the upper end of the cover gasket (4), and the pilot solenoid valve is fixedly installed on the axial upper side of the screw sleeve (5) The hole of the main valve core (2) is connected to the pilot valve oil inlet (6) through the middle hole of the cover gasket (4), the hole of the pilot damper (14) is arranged in the axial direction of the screw sleeve (5), the pilot valve oil return port (15) and the pilot valve oil outlet are respectively arranged on the side of the pilot valve sleeve (7), the pilot valve core (8) is installed in the axial hole of the pilot valve sleeve (7), one end of the pilot valve sleeve (7) is connected to the pilot valve oil inlet (18), and the other end One end is connected to a magnetic sleeve (12), one end of the pilot valve core (8) is fixedly connected to an armature (9), and the armature (9) is arranged in an axial hole of the magnetic sleeve (12), the pilot spring (10) is arranged between the armature (9) and the magnetic sleeve (12), the coil (11) is sleeved on the axial outer diameter of the magnetic sleeve (12), and is used to achieve the effect of large flow pilot structure hydraulic control, and the pilot solenoid valve is a proportional non-leakage solenoid valve.

2. The integrated two-way cartridge valve hydraulic control device based on flow control according to claim 1, characterized in that: The intelligent control system includes a viscosity identification module, a reset capability identification module and a pre-closing module; The reset capability identification module and the viscosity identification module are both electrically connected to the pre-closing module, the viscosity identification module is used to identify the viscosity of the oil, the reset capability identification module is used to identify the reset capability of the pilot spring (10), and the pre-closing module is used to control the pre-closing time of the pilot solenoid valve.

3. The integrated two-way cartridge valve hydraulic control device based on flow control according to claim 2, characterized in that: The viscosity identification module includes an oil viscosity unit and a temperature unit; The oil viscosity unit is electrically connected to the temperature unit, the oil viscosity unit is used to record the original viscosity data of the oil, and the temperature unit is used to identify the working environment temperature.

4. The integrated two-way cartridge valve hydraulic control device based on flow control according to claim 3, characterized in that: The operation steps of the intelligent control system include: Step S1, the two-way cartridge valve hydraulic control device is running, and the intelligent control system is running; Step S2: Identify the viscosity of the oil through the viscosity identification module. At the same time, the original viscosity data of the oil is recorded by the oil viscosity unit, and the working environment is identified by the temperature unit, so as to judge the true viscosity of the oil and obtain the first pre-closure time; Step S3: Identify the reset ability of the pilot spring (10) through the reset ability identification module, calculate its reset ability according to the closing times of the pilot spring (10), and obtain the second pre-closure time. When the reset ability of the pilot spring (10) drops to a certain value, enter Step S4; otherwise, enter Step S5; Step S4: Combine the reset ability of the pilot spring (10) with the true viscosity of the oil to obtain the third pre-closure time; Step S5: Control the pre-closure time of the pilot solenoid valve according to the second and third pre-closure times.

5. The integrated two-way cartridge valve hydraulic control device based on flow control according to claim 4, characterized in that: In step S2, the first pre-closing time is: T1 = T + T 流 , μ=μ0*20.1(t0-t), T1 is the first pre-closing time, T is the pre-closing time under normal oil viscosity, T 流 is the pre-closing time required under the influence of oil viscosity, μ is the oil viscosity at ambient temperature, μ0 is the oil viscosity at a specific temperature, t0 is the temperature under normal fluidity of the oil, t is the ambient temperature, μ max The minimum ambient temperature of the two-way cartridge valve hydraulic control device, T max is the pre-closing time at the highest oil temperature; That is, the lower the ambient temperature, the lower the oil viscosity, and thus the longer the pre-closure time.

6. The integrated two-way cartridge valve hydraulic control device based on flow control according to claim 5, characterized in that: In the step S3, T2=T+T 流 +T 弹 , S is the fatigue degree of the pilot spring (10), N is the number of times the pilot spring (10) is stretched, S max is the normal fatigue degree of the pilot spring (10), T 弹 is the time from deformation to reset of the pilot spring (10), T max is the time from deformation to reset when the pilot spring (10) is initially stretched, and T2 is the additional time required for pre-closing under the action of the pilot spring (10); That is, the more times the pilot spring (10) is used, the worse its reset ability, and thus the longer the closing process time. Substitute it into the pre-closure time to obtain the second pre-closure time.

7. The integrated two-way cartridge valve hydraulic control device based on flow control according to claim 6, characterized in that: In the said Step S3: When S=S1, S1 is the maximum fatigue degree of the pilot spring (10): F is the resistance of the oil to the main valve core (2). max is the maximum resistance of the oil to the main valve core (2), F1 is the force exerted by the pilot spring (10) on the oil through the main valve core (2), S min is the initial fatigue degree of the pilot spring (10), F1 max F2 is the maximum force exerted by the pilot spring (10) on the oil through the main valve core (2). max The maximum force between the main valve core (2) and the oil that offsets each other, T 1max The maximum time required for the pilot spring (10) to return to its original position after the interaction between the main valve core (2) and the oil, i.e. is the time required for the pilot spring (10) to reset after being acted upon by the oil, and T3 is the third pre-closing time; When S < S1: T2 = T + T 流 + T 弹 ; That is, when the fatigue degree of the pilot spring (10) reaches the highest, the third pre-closure time is adopted; otherwise, the second pre-closure time is adopted.

8. The integrated two-way cartridge valve hydraulic control device based on flow control according to claim 7, characterized in that: In the said Step S3 and Step S4: When S = S1: Adopt the third pre-closure time, and the pre-closure time is further increased; When S < S1: Adopt the second pre-closure time, and the pre-closure time is relatively shortened.

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