A long-term, high-flow-rate oil supply system for telescopic hydraulic cylinders with actuator groups

Abstract

This invention provides a long-term, high-flow-rate oil supply system for telescopic cylinders with actuator groups, belonging to the field of engineering equipment and testing instruments applying large-scale hydraulic servo technology. The invention first proposes a three-chambered, separate supply and return oil telescopic cylinder, and uses a proportional control valve to achieve extension, retraction, and locking control of the cylinder piston. Then, a short-stroke supply and return hose is introduced between the telescopic cylinder and the actuator group. The relaxed vertical U-shaped design of the short-stroke hose significantly reduces the control accuracy requirements for the telescopic cylinder following the actuator group's movement, and isolates the influence of actuator group vibration on the oil supply system, improving fatigue life. Finally, adding an energy accumulator to the oil supply system effectively absorbs the "water hammer" impact caused by actuator group reversal, start-stop, and sample breakage, improving the reliability of the continuous oil supply system.

Description

Technical Field

[0001] This invention relates to the field of engineering equipment and testing instruments that utilize large-scale hydraulic servo technology, and particularly to a long-term, high-flow-rate oil supply system for telescopic cylinders with actuator groups. Background Technology

[0002] In ultra-large structural mechanics testing systems, a three-dimensional closed loading frame structure is often used to simulate the multi-field coupled response of deep engineering rock masses for extended periods of time on large physical model specimens (e.g., those measuring 5m×5m×5m and weighing up to 400t). The moving beam during loading requires the integration of a high-flow-rate electro-hydraulic servo actuator group. Simultaneously, the oil supply system must possess the characteristics of long-term (≥5000h), high-flow-rate (≥4000L / min), and high-pressure oil supply (≤35MPa), and must maintain long-term, high-flow-rate oil supply stability during the lifting and lowering of the moving beam and multi-position adjustments.

[0003] Existing oil supply methods, such as long high-pressure rubber hoses or direct-connection metal pipes, suffer from various problems including vibration transmission, fatigue aging of high-pressure rubber hoses, and pressure shocks. They are particularly ill-suited to the demanding operating conditions requiring stable oil supply over long distances of 5-10 meters, flow rates exceeding 3000 L / min, pressures of 35 MPa, and continuous operation for hundreds of hours. Therefore, a continuous oil supply system for a group of high-flow actuators that can withstand high oil pressure, resist shocks, isolate vibrations, and have a long fatigue life is needed. Summary of the Invention

[0004] To address the problems in the existing technology, this invention proposes a long-term, high-flow-rate oil supply system for a telescopic hydraulic cylinder suitable for use with actuator groups, specifically addressing the oil supply challenges faced by a large-size specimen in a three-dimensional closed-load structure during long-distance lifting and loading. This technology is achieved through four core technologies: a separate follow-up design, a telescopic hydraulic cylinder anti-flexure design, a three-chamber design for the telescopic hydraulic cylinder, and an energy storage buffer anti-impact design. It not only enables long-distance oil supply with vibration isolation, high rigidity, reduced synchronization accuracy requirements, and impact absorption, but also ensures the smooth operation of the telescopic hydraulic cylinder for extended periods. Furthermore, it provides an intelligent telescopic hydraulic cylinder oil supply and return device and method with adjustable, controllable, and high-precision-maintained oil supply end position. The specific technical solution is as follows:

[0005] This invention provides a long-term, high-flow-rate oil supply system for telescopic hydraulic cylinders with actuator groups, the system comprising:

[0006] The high-pressure oil source module is used to draw hydraulic oil from the oil tank and provide a continuous and stable high-pressure oil supply to the oil supply system.

[0007] The oil supply telescopic cylinder module is used to deliver the high-pressure oil to the oil supply short-stroke hose module;

[0008] The short-stroke oil supply hose module is used to flexibly connect the oil supply telescopic cylinder module and the actuator group module, and to deliver the high-pressure oil to the actuator group module.

[0009] This actuator module is used to provide power for the moving beam to move and load, receive the high-pressure oil, and output low-pressure return oil to the return oil short-stroke hose module.

[0010] The short-stroke return hose module is used to flexibly connect the return oil telescopic cylinder module and the actuator group module, and to deliver the low-pressure return oil to the return oil telescopic cylinder module.

[0011] The return oil telescopic cylinder module is used to send the low-pressure return oil back to the oil tank. The return oil telescopic cylinder module and the supply oil telescopic cylinder module are installed symmetrically.

[0012] The energy storage module is used to absorb the pressure shock when the actuator module reverses or the sample breaks, protecting the high-pressure oil source module and the actuator module.

[0013] Optionally, the oil supply telescopic cylinder module includes:

[0014] Heavy-duty mounting brackets are used for rigid fixation to the sidewalls of the equipment pit.

[0015] Parallel guide rods are used for the rigid sliding frame between the through piston and the cylinder. The two ends of the parallel guide rods are rigidly fixed to the heavy-duty mounting bracket and pass through the oil supply telescopic cylinder module.

[0016] The cylinder barrel serves as the external support for the oil supply telescopic cylinder module and is installed parallel to the lower part of the parallel guide rod.

[0017] The through-piston is used for dynamic oil supply during the extension and retraction of the actuator module;

[0018] The oil supply pipe is used to supply oil to the inside of the through piston;

[0019] A moving beam displacement sensor is used to collect the moving beam displacement and is installed on the support frame of the moving beam.

[0020] A piston displacement sensor, used to collect the piston displacement of the through-piston, is installed at the oil outlet end of the through-piston.

[0021] The telescopic drive unit is used to drive and control the telescopic movement of the through-piston.

[0022] Optionally, the cylinder includes: a bottom end cap, a cylinder body, and a top end cap;

[0023] The bottom end cap of the cylinder is installed at the lower part of the cylinder body, the top end cap of the cylinder has an opening in the middle, and the top end cap of the cylinder is installed at the upper part of the cylinder body; the bottom end cap of the cylinder has a bottom oil inlet, and the cylinder body has a first side wall oil inlet and a second side wall oil inlet; the bottom oil inlet of the cylinder is connected to the high-pressure oil source module.

[0024] Optionally, the through-hole piston includes: a piston end, a piston rod, a central hole, and an oil outlet end;

[0025] The piston end is installed inside the cylinder and moves along the cylinder wall. The piston rod engages with the middle opening of the top end cap of the cylinder. The oil outlet is installed on the parallel guide rod and moves up and down along the parallel guide rod. The oil outlet is connected to the oil supply short-stroke hose module and the energy storage module. The end of the oil pipe is fitted with a flange and is fixedly connected to the bottom end cap of the cylinder through the flange. The oil pipe passes through the middle hole. The telescopic drive unit passes through the first side wall oil inlet and the second side wall oil inlet.

[0026] Optionally, the oil supply pipe, the cylinder, and the through-hole piston form three functional chambers; each functional chamber includes:

[0027] The oil supply chamber, used to supply oil to the oil supply system, is formed by the inner wall of the oil supply pipe, the inner wall of the through piston, and the oil inlet at the bottom of the cylinder.

[0028] The first telescopic drive chamber, used for telescopic drive of the through piston, is formed by the outer wall of the oil supply pipe, the piston end of the through piston, and the inner wall of the cylinder at the first side wall oil inlet.

[0029] The second telescopic drive chamber is used to cooperate with the first telescopic drive chamber to drive the through piston to extend and retract. It is formed by the outer wall of the piston rod and the inner wall of the cylinder at the oil inlet of the second side wall.

[0030] Optionally, the telescopic drive unit includes:

[0031] The telescopic drive controller is used to receive the displacement data of the moving beam output by the moving beam displacement sensor and the displacement data of the piston output by the piston displacement sensor, and output the telescopic drive signal according to the embedded PID algorithm.

[0032] The proportional valve is used to receive the telescopic drive signal output by the telescopic drive controller, and according to the telescopic drive signal, control the flow rate and direction of the hydraulic oil entering the first telescopic drive port and the second telescopic drive port, thereby controlling the synchronous movement of the through-piston and the moving beam.

[0033] Optionally, the energy storage module includes:

[0034] The accumulator valve block is used to connect the oil supply telescopic cylinder module, the oil supply short-stroke hose module and the accumulator, providing isolation, protection and maintenance interface for the oil circuit of the oil supply system;

[0035] This energy storage device is used to absorb pressure shocks.

[0036] Optionally, multiple sealing rings and guide rings are provided between the oil supply pipe and the bottom end cap of the cylinder and the inner wall of the through piston, and between the outer wall of the through piston and the top end cap of the cylinder.

[0037] Optionally, the oil supply short-stroke hose module and the oil return short-stroke hose module are arranged in a vertical U-shape and have flexible space.

[0038] Optionally, the oil supply process of this applicable actuator group telescopic cylinder long-term high-flow oil supply system has five stages:

[0039] Sample loading stage: When the moving beam descends to the lower limit, the telescopic drive unit controls the oil supply telescopic cylinder module and the oil return telescopic cylinder module to retract synchronously.

[0040] Lifting phase: The telescopic drive unit controls the oil supply telescopic cylinder module and the oil return telescopic cylinder module to actively follow the lifting action of the moving beam;

[0041] During the loading phase of the test: the moving beam and the specimen form a closed force system. The high-pressure oil source module supplies high-pressure oil to the actuator group module through the oil supply telescopic cylinder module and the oil supply short-stroke hose module. The actuator group module outputs low-pressure oil through the return oil short-stroke hose module and the return oil telescopic cylinder module, and finally enters the oil tank. The extreme pressure impact generated by the specimen's loading and rupture is absorbed by the energy storage module.

[0042] During the sample unloading stage: the moving beam descends to the lower limit position, the telescopic drive unit controls the oil supply telescopic cylinder module and the oil return telescopic cylinder module to be fully retracted, and the oil supply short stroke hose module and the oil return short stroke hose module droop down in a vertical U-shape;

[0043] Locking phase: The telescopic drive unit cuts off the telescopic oil supply to the oil supply telescopic cylinder module and the oil return telescopic cylinder module, and the positions of the oil supply telescopic cylinder module and the oil return telescopic cylinder module are locked.

[0044] Compared with the prior art, the technical solution of the present invention has at least the following beneficial effects:

[0045] The above solution addresses several issues. First, by using a short-distance high-pressure hose, the moving beam is physically isolated from the oil supply pipeline and hydraulic oil source system, significantly improving the overall system stability and long-term service life. The short hose and accumulator also block vibration transmission, protecting the pump station and foundation. Second, the oil delivery pipe and through-piston, in conjunction with the guide rod, ensure zero cylinder deflection, extending seal life. The mechanical slide rail constraint completely solves the deflection problem of telescopic cylinders with large length-to-diameter ratios, avoiding seal wear, jamming, and internal and external leakage of the cylinder, making the telescopic cylinder suitable for ultra-long stroke conditions. Third, the accumulator effectively absorbs the extreme energy within the system. The end pressure shock protects the expensive oil source and servo components, improving system reliability. Fourthly, it reduces the requirements for sensor accuracy and control algorithm computing power. The large tolerance design reduces the synchronization accuracy requirements, making it possible for proportional control to replace high-cost servo control, thereby effectively controlling the overall cost while ensuring system reliability. Fifthly, after adaptive adjustments, it can be seamlessly transferred to fields such as horizontal moving oil supply for multi-station movable vibration test benches (such as water vibration test benches for bridge components) and synchronous vibration-free oil supply for high-flow lifting sliders of 10,000-ton forging presses. Attached Figure Description

[0046] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0047] Figure 1 This is a system block diagram of an embodiment of the applicable actuator group telescopic hydraulic cylinder long-term high-flow oil supply system of the present invention;

[0048] Figure 2 This is a system configuration and layout diagram of an embodiment of the applicable actuator group telescopic hydraulic cylinder long-term high-flow oil supply system of the present invention;

[0049] Figure 3 This is a schematic diagram of the supply and return oil telescopic cylinder structure of an embodiment of the long-term high-flow oil supply system for telescopic cylinders applicable to actuator groups of the present invention.

[0050] Explanation of the numbers in the diagram: 1. High-pressure oil source module; 2. Oil supply telescopic cylinder module; 3. Oil supply short-stroke hose module; 4. Actuator group module; 5. Oil return short-stroke hose module; 6. Oil return telescopic cylinder module; 7. Energy storage module; 8. Equipment pit; 9. Oil delivery chamber; 10. First telescopic drive chamber; 11. Second telescopic drive chamber; 12. Moving beam; 21. Heavy-duty mounting support; 22. Parallel guide rod; 23. Cylinder; 24. Through-piston; 25. Telescopic drive unit; 26. Oil delivery pipe. 27. Moving beam displacement sensor, 28. Piston displacement sensor, 231. Cylinder bottom end cover, 232. Cylinder body, 233. Cylinder top end cover, 2311. Cylinder bottom oil inlet, 2321. First side wall oil inlet, 2322. Second side wall oil inlet, 241. Piston end, 242. Piston rod, 243. Intermediate hole, 244. Oil outlet, 251. Proportional valve, 252. Telescopic drive controller, 261. Flange, 71. Energy storage valve block, 72. Detailed Implementation

[0051] The technical solution of the present invention will now be described with reference to the accompanying drawings.

[0052] In embodiments of the present invention, words such as "exemplarily," "for example," etc., are used to indicate that something is an example, illustration, or description. Any embodiment or design described as "exemplary" in the present invention should not be construed as being more preferred or advantageous than other embodiments or designs. Specifically, the use of the word "exemplary" is intended to present the concept in a concrete manner. Furthermore, in embodiments of the present invention, the meaning expressed by "and / or" can be both, or either one.

[0053] To make the technical problems, technical solutions and advantages of the present invention clearer, a detailed description will be given below in conjunction with the accompanying drawings and specific embodiments.

[0054] like Figure 1 The system block diagram and embodiment of the applicable actuator group telescopic cylinder long-term high-flow oil supply system of the present invention shown are illustrated. Figure 2 The diagram shown is a system configuration and layout diagram of an embodiment of the long-term, high-flow-rate oil supply system for telescopic hydraulic cylinders of the present invention. The present invention provides a long-term, high-flow-rate oil supply system for telescopic hydraulic cylinders of the present invention, which includes: a high-pressure oil source module 1, an oil supply telescopic hydraulic cylinder module 2, an oil supply short-stroke hose module 3, an actuator group module 4, an oil return short-stroke hose module 5, an oil return telescopic hydraulic cylinder module 6, and an energy storage module 7.

[0055] The high-pressure oil source module 1 is used to draw hydraulic oil from the oil tank and provide a continuous and stable high-pressure oil supply to the oil supply system.

[0056] The oil supply telescopic cylinder module 2 is used to deliver the high-pressure oil to the oil supply short-stroke hose module 3;

[0057] Specifically, such as Figure 3 The schematic diagram shown is of the supply and return oil telescopic cylinder structure of an embodiment of the present invention applicable to the long-term high-flow-rate oil supply system of a telescopic cylinder for actuator groups. The oil supply telescopic cylinder module 2 includes:

[0058] Heavy-duty mounting bracket 21 is used for rigid fixation to the side wall of the equipment pit 8;

[0059] Parallel guide rod 22 is used for the rigid sliding frame between the through piston 24 and the cylinder 23. The two ends of the parallel guide rod 22 are rigidly fixed on the heavy-duty mounting bracket 21 and pass through the oil supply telescopic cylinder module 2.

[0060] The cylinder 23 serves as the external support for the oil supply telescopic cylinder module 2 and is installed parallel to the lower part of the parallel guide rod 22.

[0061] Furthermore, the cylinder 23 includes: a bottom end cap 231, a cylinder body 232, and a top end cap 233;

[0062] Furthermore, the bottom end cap 231 of the cylinder is installed at the lower part of the cylinder body 232, and the top end cap 233 of the cylinder has an opening in the middle and is installed at the upper part of the cylinder body 232; the bottom end cap 231 of the cylinder has a bottom oil inlet 2311, and the cylinder body has a first side wall oil inlet 2321 and a second side wall oil inlet 2322; the bottom oil inlet 2311 of the cylinder is connected to the high-pressure oil source module 1;

[0063] The through-piston 24 is used for the dynamic oil supply during the extension and retraction of the actuator module 4;

[0064] Specifically, the through-hole piston 24 includes: piston end 241, piston rod 242, intermediate hole 243 and oil outlet end 244;

[0065] Furthermore, the piston end 241 is installed inside the cylinder 23 and can move along the cylinder wall. The piston rod 242 is engaged with the middle opening of the top end cap 233 of the cylinder. The oil outlet end 244 is installed on the parallel guide rod 22 and can move up and down along the parallel guide rod 22. The oil outlet end 244 is connected to the oil supply short-stroke hose module 3 and the energy storage module 7. The end of the oil pipe 26 is fitted with a flange 261, which is fixedly connected to the bottom end cap 231 of the cylinder through the flange 261. The oil pipe 26 passes through the middle hole 243. The telescopic drive unit 25 receives oil through the first side wall oil inlet 2321 and the second side wall oil inlet 2322.

[0066] The oil supply pipe 26 is used to supply oil to the interior of the through piston 24;

[0067] Specifically, multiple sealing rings and guide rings are provided between the oil pipe 26 and the bottom end cap 231 of the cylinder and the inner wall of the through piston 24, and between the outer wall of the through piston 24 and the top end cap 233 of the cylinder.

[0068] Furthermore, the oil pipe 26, the cylinder 23, and the through piston 24 form three functional chambers; each functional chamber includes:

[0069] The oil supply chamber 9 is used to supply oil to the oil supply system and is formed by the inner wall of the oil supply pipe 26, the inner wall of the through piston 24 and the oil inlet 2311 at the bottom of the cylinder.

[0070] The first telescopic drive chamber 10 is used to drive the telescopic movement of the through piston 24, and is formed by the outer wall of the oil pipe 26, the piston end 241 of the through piston 24, and the inner wall of the cylinder 23 at the first side wall oil inlet 2321.

[0071] The second telescopic drive chamber 11 is used to cooperate with the first telescopic drive chamber 10 to drive the through piston 24 to extend and retract. It is formed by the outer wall of the piston rod 242 and the inner wall of the cylinder 23 at the second side wall oil inlet 2322.

[0072] The moving beam displacement sensor 27 is used to collect the moving beam displacement of the moving beam 12 and is installed on the support frame of the moving beam 12.

[0073] Piston displacement sensor 28, used to collect the piston displacement of the through piston 24, is installed at the oil outlet end of the through piston 24.

[0074] The telescopic drive unit 25 is used to drive and control the telescopic movement of the through piston 24;

[0075] Specifically, the telescopic drive unit 25 includes:

[0076] The telescopic drive controller 252 is used to receive the displacement data of the moving beam output by the moving beam displacement sensor 27 and the piston displacement data output by the piston displacement sensor 28, and output the telescopic drive signal according to the embedded PID algorithm.

[0077] The proportional valve 251 is used to receive the telescopic drive signal output by the telescopic drive controller 252, and according to the telescopic drive signal, control the flow rate and direction of the hydraulic oil entering the first telescopic drive port 2321 and the second telescopic drive port 2322, thereby controlling the synchronous movement of the through piston 24 and the moving beam 12.

[0078] The oil supply short-stroke hose module 3 is used to flexibly connect the oil supply telescopic cylinder module 2 and the actuator group module 4, and to deliver the high-pressure oil to the actuator group module 4;

[0079] The actuator module 4 is used to provide power for the moving beam 12 to move and load, receive the high-pressure oil, and output low-pressure return oil to the return oil short-stroke hose module 5.

[0080] The short-stroke return hose module 5 is used to flexibly connect the return oil telescopic cylinder module 6 and the actuator group module 4, and to deliver the low-pressure return oil to the return oil telescopic cylinder module 6.

[0081] Specifically, the oil supply short-stroke hose module 3 and the oil return short-stroke hose module 5 are arranged symmetrically, and the oil supply short-stroke hose module 3 and the oil return short-stroke hose module 5 are arranged in a vertical U-shape and have elastic space.

[0082] The return oil telescopic cylinder module 6 is used to send the low-pressure return oil back to the oil tank. The return oil telescopic cylinder module 6 and the supply oil telescopic cylinder module 2 are installed symmetrically.

[0083] The energy storage module 7 is used to absorb the pressure shock when the actuator module 4 reverses or the sample breaks, and to protect the high-pressure oil source module 1 and the actuator module 4.

[0084] Specifically, the energy storage module 7 includes:

[0085] The accumulator valve block 71 is used to connect the oil supply telescopic cylinder module 2, the oil supply short-stroke hose module 3 and the accumulator 72, providing an isolation, protection and maintenance interface for the oil circuit of the oil supply system;

[0086] The energy storage device 72 is used to absorb pressure shocks.

[0087] The oil supply process of this applicable actuator group telescopic cylinder long-term high-flow oil supply system consists of five stages, including:

[0088] During the sample loading stage: the moving beam 12 descends to the lower limit position, and the telescopic drive unit 25 controls the oil supply telescopic cylinder module 2 and the oil return telescopic cylinder module 6 to retract synchronously.

[0089] Lifting phase: The telescopic drive unit 25 controls the oil supply telescopic cylinder module 2 and the oil return telescopic cylinder module 6 to actively follow the lifting action of the moving beam 12;

[0090] During the loading phase of the test: The moving beam 12 and the specimen form a closed force system. The high-pressure oil source module 1 supplies high-pressure oil to the actuator group module 4 through the oil supply telescopic cylinder module 2 and the oil supply short-stroke hose module 3. The actuator group module 4 outputs low-pressure oil through the return oil short-stroke hose module 5 and the return oil telescopic cylinder module 6, and finally enters the oil tank. The extreme pressure impact generated by the specimen loading and rupture is absorbed by the energy storage module 7.

[0091] During the sample unloading stage: the moving beam 12 descends to the lower limit position, the telescopic drive unit 25 controls the oil supply telescopic cylinder module 2 and the oil return telescopic cylinder module 6 to be fully retracted, and the oil supply short stroke hose module 3 and the oil return short stroke hose module 5 droop down to form the vertical U-shape.

[0092] Locking phase: The telescopic drive unit 25 cuts off the telescopic oil supply to the oil supply telescopic cylinder module 2 and the oil return telescopic cylinder module 6, and the positions of the oil supply telescopic cylinder module 2 and the oil return telescopic cylinder module 6 are locked.

[0093] This invention provides a long-term, high-flow-rate oil supply system for telescopic cylinders with actuator groups. Firstly, it proposes a three-chambered, separate supply and return oil telescopic cylinder, and uses a proportional control valve to control the extension, retraction, and locking of the cylinder piston. Then, a short-stroke supply and return hose module is introduced between the telescopic cylinder and the actuator group. The relaxed vertical U-shaped design of the short-stroke hose reduces the control precision required for the telescopic cylinder to follow the actuator group's movement, and isolates the impact of actuator group vibration on the oil supply system, thus improving fatigue life. Finally, an energy accumulator 72 is added to the oil supply system to effectively absorb water hammer impacts caused by actuator group reversal, sample breakage, start-stop, and other operating conditions, improving the reliability of the continuous oil supply system.

[0094] It is understood that the present invention has been described through the above embodiments and should not be construed as limiting the implementation and scope of the present invention. Those skilled in the art will recognize that various changes or equivalent substitutions can be made to these features and embodiments without departing from the spirit and scope of the present invention. Furthermore, under the teachings of the present invention, these features and embodiments can be modified to adapt to specific situations and materials without departing from the spirit and scope of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are within the protection scope of the present invention.

Claims

1. A long-term, high-flow-rate oil supply system for telescopic hydraulic cylinders with actuator groups, characterized in that, The system comprises: a high-pressure oil source module for extracting hydraulic oil from an oil tank and providing continuous and stable high-pressure oil for an oil supply system; an oil supply telescopic cylinder module for delivering the high-pressure oil to an oil supply short-stroke hose module; the oil supply short-stroke hose module for flexibly connecting the oil supply telescopic cylinder module and an actuator group module and delivering the high-pressure oil to the actuator group module; the actuator group module for providing power for the movement of a moving beam, receiving the high-pressure oil, and outputting low-pressure return oil to a return oil short-stroke hose module; the return oil short-stroke hose module for flexibly connecting a return oil telescopic cylinder module and the actuator group module and delivering the low-pressure return oil to the return oil telescopic cylinder module; the return oil telescopic cylinder module for returning the low-pressure return oil to the oil tank, the return oil telescopic cylinder module being symmetrically installed with the oil supply telescopic cylinder module; an energy accumulator module for absorbing pressure impact when the actuator group module reverses or a sample breaks, and protecting the high-pressure oil source module and the actuator group module; the oil supply telescopic cylinder module comprising: a heavy-duty mounting support for rigidly fixing with a sidewall of a device foundation pit; a parallel guide light pole for rigidly sliding frames of a through-piston and a cylinder barrel, both ends of the parallel guide light pole being rigidly fixed on the heavy-duty mounting support and penetrating through the oil supply telescopic cylinder module; the cylinder barrel for external support of the oil supply telescopic cylinder module, being installed in parallel at a lower part of the parallel guide light pole; the through-piston for telescopic dynamic oil supply of the actuator group module; an oil delivery pipe for oil supply to an inside of the through-piston; a moving beam displacement sensor for collecting moving beam displacement of the moving beam, being installed on a support frame of the moving beam; a piston displacement sensor for collecting piston displacement of the through-piston, being installed at an oil outlet end of the through-piston; a telescopic driving unit for driving and controlling telescoping of the through-piston; the oil delivery pipe, the cylinder barrel and the through-piston forming three functional cavities; the functional cavities comprising: an oil delivery cavity for oil supply of the oil supply system, being formed by an inner wall of the oil delivery pipe, an inner wall of the through-piston and an oil inlet at a bottom of the cylinder barrel; a first telescopic driving cavity for telescopic driving of the through-piston, being formed by an outer wall of the oil delivery pipe, a piston end of the through-piston and an inner wall of the cylinder barrel at a first side wall oil inlet; a second telescopic driving cavity for cooperating with the first telescopic driving cavity to drive the through-piston, being formed by an outer wall of a piston rod and an inner wall of the cylinder barrel at a second side wall oil inlet; the telescopic driving unit comprising: a telescopic driving controller for receiving the moving beam displacement output by the moving beam displacement sensor and the piston displacement output by the piston displacement sensor, and outputting a telescopic driving signal according to an embedded PID algorithm. A proportional valve is arranged to receive the telescopic drive signal outputted by the telescopic drive controller and control the flow and direction of hydraulic oil into the first and second telescopic drive oil ports according to the telescopic drive signal, thereby controlling the synchronous movement of the through-piston and the moving beam.

2. The long-time large-flow oil supply system for a telescopic cylinder of a group actuator according to claim 1, wherein The cylinder includes a cylinder bottom end cover, a cylinder body and a cylinder top end cover. The cylinder bottom end cover is installed at the lower part of the cylinder body, the cylinder top end cover is provided with a middle hole, and the cylinder top end cover is installed at the upper part of the cylinder body; the cylinder bottom end cover is provided with a cylinder bottom oil inlet port, the cylinder body is provided with a first side wall oil inlet port and a second side wall oil inlet port; the cylinder bottom oil inlet port is connected with the high-pressure oil source module.

3. The long-time large-flow oil supply system for a telescopic cylinder of a group actuator according to claim 2, wherein The through-piston includes a piston end, a piston rod, a middle hole and an oil outlet end. The piston end is installed inside the cylinder and moves along the cylinder wall, the piston rod is matched with the middle hole of the cylinder top end cover, the oil outlet end is installed on the parallel guide rod and moves up and down along the parallel guide rod, the oil outlet end is connected with the oil supply short-stroke hose module and the energy accumulator module, the end of the oil delivery pipe is provided with a flange, the flange is fixedly connected with the cylinder bottom end cover, the oil delivery pipe penetrates into the middle hole, and the telescopic drive unit is connected with the first side wall oil inlet port and the second side wall oil inlet port.

4. The long-time large-flow oil supply system for a telescopic cylinder of a group actuator according to claim 1, wherein The energy accumulator module includes: An energy accumulator valve block is arranged to connect the oil supply telescopic oil cylinder module, the oil supply short-stroke hose module and the energy accumulator, and provide isolation, protection and maintenance interface for the oil circuit of the oil supply system; The energy accumulator is arranged to absorb pressure impact.

5. The long-time high-flow oil supply system for a telescopic cylinder of a group actuator according to claim 2, wherein Multiple sealing rings and guide rings are arranged between the oil delivery pipe and the inner wall of the through-piston and between the outer wall of the through-piston and the cylinder top end cover.

6. The long-time large-flow oil supply system for a telescopic cylinder of a group actuator according to claim 1, wherein The oil supply short-stroke hose module and the oil return short-stroke hose module are arranged in a vertical U shape and have elastic space.

7. The long-time high-flow oil supply system for a telescopic cylinder of a group actuator according to claim 1, wherein The oil supply process of the telescopic oil cylinder suitable for the long-time high-flow oil supply system of the actuator group includes five stages: Sample loading stage: the moving beam is lowered to the lower limit, and the telescopic drive unit controls the oil supply telescopic oil cylinder module and the oil return telescopic oil cylinder module to synchronously recover; Lifting stage: the telescopic drive unit controls the oil supply telescopic oil cylinder module and the oil return telescopic oil cylinder module to actively follow the lifting action of the moving beam; Test loading stage: the moving beam is closed with the sample to form a force system, the high-pressure oil source module supplies high-pressure oil to the actuator group module through the oil supply telescopic oil cylinder module and the oil supply short-stroke hose module, the actuator group module outputs low-pressure oil through the oil return short-stroke hose module and the oil return telescopic oil cylinder module, and finally the low-pressure oil enters the oil tank; the extreme pressure impact generated by the sample loading rupture is absorbed by the energy accumulator module. Sample unloading stage: the movable beam is lowered to the lower limit position, the telescopic drive unit controls the oil supply telescopic oil cylinder module and the oil return telescopic oil cylinder module to be fully recovered, and the oil supply short-stroke hose module and the oil return short-stroke hose module are lowered to present a vertical U shape; Locking stage: the telescopic drive unit cuts off the telescopic oil supply of the oil supply telescopic oil cylinder module and the oil return telescopic oil cylinder module, and the oil supply telescopic oil cylinder module and the oil return telescopic oil cylinder module are position-locked.

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