Semi-active broadband damping device for inhibiting vertical vibration of ultra-deep well lifting steel wire rope

Abstract

The invention discloses a semi-active broadband damping device for inhibiting vertical vibration of an ultra-deep well lifting steel wire rope, which is characterized in that the total rigidity of parallel connection of a liquid-gas spring and a vertical spring in the descending and lifting processes is ensured by controlling the real-time opening degrees of two adjustable throttle valves; the total dissipation damping force of the adjustable throttling valve and the built-in throttling groove can change along with the total rigidity of the parallel connection of the liquid-gas spring and the vertical spring in real time. According to the semi-active broadband damping device for restraining vertical vibration of the ultra-deep well lifting steel wire rope, the vibration displacement amplitude of the steel wire rope is reduced, the vibration duration is shortened, the service life of the lifting steel wire rope is prolonged, high-frequency disturbance excitation of the lifting steel wire rope is isolated, and the running stability of a lifting container is improved.

Description

Technical Field

[0001] This invention belongs to the field of vibration reduction technology for ultra-deep mine hoists, specifically relating to a semi-active broadband vibration reduction device for suppressing vertical vibration of ultra-deep mine hoisting wire ropes. Background Technology

[0002] In recent years, coal mining depths have primarily focused on depths of 500–800 meters below the surface. However, approximately 53% of total coal reserves are buried at even deeper depths of 1000–2000 meters. Effective mining of deep coal resources necessitates the use of deep and ultra-deep (>1000m) hoisting systems. Ultra-deep hoists face numerous challenges, including high speed, heavy loads, long strokes, and large inertia. During frequent acceleration, deceleration, and braking, the hoisting wire rope suffers accelerated fatigue damage due to inertial impact and vibration, leading to a shortened service life. Furthermore, ultra-deep hoisting wire ropes are highly susceptible to high-frequency disturbances during high-speed operation. These high-frequency vibrations are transmitted to the hoisting container, affecting passenger comfort. Therefore, without altering operating conditions, reducing the vibration amplitude and duration of the wire rope, isolating high-frequency disturbances from the hoisting wire rope, and improving passenger comfort in the hoisting container have become critical technical challenges urgently needing to be addressed in the field of deep coal resource mining hoisting.

[0003] Currently, vibration suppression and isolation technologies for hoisting wire ropes in ultra-deep mines are still in the early stages of theoretical exploration. Active control devices not only require a large external energy supply but also rely on high-precision control algorithms and sensor feedback. Furthermore, due to the complex and harsh environment of ultra-deep mines, if the system experiences a power outage or malfunction, the device may become an active excitation source, triggering parametric excitation or even system instability. While passive control devices can suppress vibrations at specific frequencies to some extent, they are insufficient to meet the vibration reduction and isolation requirements of ultra-deep mine hoisting wire ropes with varying stiffness and damping characteristics. Summary of the Invention

[0004] To address the challenges of vibration suppression and isolation in ultra-deep well hoisting wire ropes, this invention proposes a semi-active broadband vibration reduction device to suppress vertical vibration of ultra-deep well hoisting wire ropes. This device reduces the vibration displacement amplitude and shortens the vibration duration of the wire rope, thereby extending its service life. Simultaneously, it isolates high-frequency disturbances in the hoisting wire rope, improving the comfort of the hoisting container.

[0005] To achieve the above objectives, the technical solution of the present invention is as follows:

[0006] A semi-active broadband vibration damping device for suppressing vertical vibration of hoisting wire ropes in ultra-deep wells includes: a gas storage tank 1, a controller 15, an adjustable flow valve 2 (#1), an adjustable flow valve 6 (#2), an adjustable flow valve 10 (#3), a cylinder 4, a piston head 13, a vertical spring 11, a piston rod 7, an external throttling channel 3, an upper connecting frame 20, and a lower connecting frame 21; wherein, the piston head 13 is cylindrical, and several vertically penetrating internal throttling grooves 14 are evenly distributed along the circumference of the piston head 13, forming an internal throttling channel. The ratio of the diameter of the flow channel 14 to the diameter of the piston head 13 is 1:50-1:20; the air storage tank 1 is connected to the inlet of the #2 adjustable flow valve 6 via a pipeline, and the outlet of the #2 adjustable flow valve 6 is connected to the air inlet 18 of the cylinder 4 via a pipeline; the controller 15 is connected to the #1 adjustable flow valve 2, the #2 adjustable flow valve 6, and the #3 adjustable flow valve 10 via control lines; the external throttling channel 3 is an independent flow channel located outside the cylinder 4, with one end connected to the cylinder body. The rod chamber of cylinder 4 is connected to the rodless chamber of cylinder 4 at one end, and the other end is connected to the rodless chamber of cylinder 4 at the other end. The adjustable flow valve 2 is installed in the external throttling channel 3. One end of the adjustable flow valve 10 is connected to the exhaust port 19 of cylinder 4, and the other end is connected to the external exhaust port 9, which is an open exhaust port to the atmosphere. The rod chamber of cylinder 4 is filled with nitrogen gas 5. The nitrogen gas 5 interacts with the hydraulic oil 12 in the rod chamber to form a hydro-pneumatic spring in the rod chamber. The piston rod 7 in the rod chamber of cylinder 4 is connected to the cylinder body. 4. A vertical spring 11 is installed inside the cylinder 4. The vertical spring 11 is connected in parallel with the hydro-pneumatic spring composed of nitrogen 5 and hydraulic oil 12 in the rod chamber. During the reciprocating stroke of the piston head, the rodless chamber, the external throttling channel 3 and the internal throttling groove 14 are all filled with hydraulic oil 12. When the piston head 13 moves up and down, the hydraulic oil 12 in the rod chamber and the rodless chamber of the cylinder 4 interacts through the internal throttling groove 14 on the piston head 13 and the external throttling channel 3 controlled by the #1 adjustable flow valve 2.

[0007] The controller 15 controls the opening of the adjustable flow valve 2, adjustable flow valve 6 and adjustable flow valve 10 in real time to ensure that the total stiffness of the hydraulic spring and the vertical spring 11 connected in parallel during the lowering and lifting of the lifting container 16 is at least 0.1 times the stiffness of the lifting wire rope 8.

[0008] During the lowering and raising of the lifting container 16, the controller 15 controls the opening of the adjustable flow valve 6 #2, so that the total dissipative damping force of the adjustable flow valve 6 #2 and the built-in throttling groove 14 in real time is 0.1-0.65 times the elastic force generated by the parallel connection of the liquid-gas spring and the vertical spring 11.

[0009] A semi-active broadband vibration damping device for suppressing vertical vibration of hoisting wire rope in ultra-deep wells is connected between the hoisting wire rope 8 and the hoisting container 16 of the ultra-deep well hoist via upper and lower connecting frames 20 and 21. In the ultra-deep well hoist, a set of semi-active broadband vibration damping devices for suppressing vertical vibration of hoisting wire rope in ultra-deep wells is installed on each hoisting wire rope 8.

[0010] The gas storage tank 1 and the controller 15 are installed on top of the lifting container 16.

[0011] The top of the cylinder 4 is provided with an air inlet 18 and an exhaust port 19, and the external throttling channel 3 is arranged along the side of the cylinder 4.

[0012] The upper connecting frame 20 and the lower connecting frame 21 are U-shaped structural components used to realize the transmission and conversion of force. The upper end of the upper connecting frame 20 has an opening through which the lifting wire rope 8 passes and forms a circular joint 24 with the end of the lifting wire rope 8 for fixed connection. The lower end of the upper connecting frame 20 is fixed to the bottom of the cylinder body 4 by bolts 22. The upper end of the lower connecting frame 21 is fixed to the top of the piston rod 7 by bolts 23, and the lower end of the lower connecting frame 21 is connected to the top of the lifting container 16 by bolts 22. The bottom end of the lifting container 16 is connected to the balance tail rope 17.

[0013] The present invention has the following beneficial effects:

[0014] 1) This invention can effectively match the variable stiffness and variable damping characteristics of the hoisting wire rope in ultra-deep wells by using an adjustable hydraulic spring and an external adjustable flow channel, thereby achieving efficient absorption and rapid dissipation of the inertial impact energy generated by the system, reducing the vibration displacement amplitude of the wire rope and shortening the vibration duration, thus extending the service life of the wire rope.

[0015] 2) This invention can effectively isolate the high-frequency disturbance excitation of the hoisting wire rope and improve the stability of the hoisting container operation.

[0016] 3) This invention can avoid parameter excitation or even system instability caused by controller power failure or malfunction by using a built-in low-stiffness vertical spring and a large-damping throttling groove in the cylinder body, thereby improving the safety of the ultra-deep well hoist. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of a semi-active broadband vibration reduction device for suppressing vertical vibration of hoisting wire ropes in ultra-deep wells according to the present invention.

[0018] Figure 2 This is a schematic diagram of the connection structure between the semi-active broadband vibration reduction device of the present invention and the ultra-deep well lifting structure;

[0019] Figure 3 This is a schematic diagram of the operating principle of the ultra-deep well hoist of the present invention;

[0020] Figure 4 This is a schematic diagram illustrating the starting process of a semi-active broadband vibration damping device for suppressing vertical vibration of hoisting wire ropes in ultra-deep wells, according to the present invention.

[0021] Figure 5 This is a schematic diagram illustrating the principle of a semi-active broadband vibration damping device for suppressing vertical vibration of hoisting wire ropes in ultra-deep wells during the uniform lowering process, as described in this invention.

[0022] Figure 6 This is a schematic diagram illustrating the braking process during the lowering of a semi-active broadband vibration damping device for suppressing vertical vibration of hoisting wire ropes in ultra-deep wells, as described in this invention.

[0023] Figure 7 This is a schematic diagram illustrating the starting process of a semi-active broadband vibration damping device for suppressing vertical vibration of hoisting wire ropes in ultra-deep wells, according to the present invention.

[0024] Figure 8 This is a schematic diagram of the principle of a semi-active broadband vibration damping device for suppressing vertical vibration of hoisting wire ropes in ultra-deep wells during the uniform lifting process of the present invention.

[0025] Figure 9 This diagram illustrates the braking process during the lifting of a semi-active broadband vibration damping device for suppressing vertical vibration of hoisting wire ropes in ultra-deep wells, as described in this invention.

[0026] In the diagram, 1-Gas storage tank, 2-Adjustable flow valve #1, 3-External throttling channel, 4-Cylinder body, 5-Nitrogen, 6-Adjustable flow valve #2, 7-Piston rod, 8-Lifting wire rope, 9-External exhaust port, 10-Adjustable flow valve #3, 11-Vertical spring, 12-Hydraulic oil, 13-Piston head; 14-Throttle groove, 15-Controller, 16-Lifting container, 17-Balance tail rope, 18-Inlet, 19-Exhaust port, 20-Upper connecting frame, 21-Lower connecting frame. Detailed Implementation

[0027] The detailed technical solution of the present invention is described below with reference to the accompanying drawings:

[0028] like Figure 1As shown, a semi-active broadband vibration damping device for suppressing vertical vibration of hoisting wire ropes in ultra-deep wells includes: a gas storage tank 1, a controller 15, an adjustable flow valve 2 (#1), an adjustable flow valve 6 (#2), an adjustable flow valve 10 (#3), a cylinder 4, a piston head 13, a vertical spring 11, a piston rod 7, an external throttling channel 3, an upper connecting frame 20, and a lower connecting frame 21; wherein, the piston head 13 is cylindrical, and several vertically penetrating internal throttling grooves 14 are evenly distributed along the circumference of the piston head 13, with internal... The ratio of the diameter of the throttling groove 14 to the diameter of the piston head 13 is 1:50-1:20; the air tank 1 is connected to the inlet of the #2 adjustable flow valve 6 via a pipeline, and the outlet of the #2 adjustable flow valve 6 is connected to the air inlet 18 of the cylinder 4 via a pipeline; the controller 15 is connected to the #1 adjustable flow valve 2, the #2 adjustable flow valve 6, and the #3 adjustable flow valve 10 via control lines; the external throttling channel 3 is an independent flow channel located outside the cylinder 4, one end of which is connected to... The rod chamber of cylinder 4 is connected at one end, and the rodless chamber of cylinder 4 is connected at the other end. The #1 adjustable flow valve 2 is installed in the external throttling channel 3. One end of the #3 adjustable flow valve 10 is connected to the exhaust port 19 of cylinder 4, and the other end is connected to the external exhaust port 9, which is an open exhaust port to the atmosphere. The rod chamber of cylinder 4 is filled with nitrogen gas 5. The nitrogen gas 5 interacts with the hydraulic oil 12 in the rod chamber to form a hydro-pneumatic spring in the rod chamber. The piston rod 7 in the rod chamber of cylinder 4 is connected to the cylinder... A vertical spring 11 is installed inside the body 4. The vertical spring 11 is connected in parallel with the hydro-pneumatic spring composed of nitrogen 5 and hydraulic oil 12 in the rod chamber. During the reciprocating stroke of the piston head, the rodless chamber, the external throttling channel 3 and the internal throttling groove 14 are all filled with hydraulic oil 12. When the piston head 13 moves up and down, the hydraulic oil 12 in the rod chamber and the rodless chamber of the cylinder 4 interacts through the internal throttling groove 14 on the piston head 13 and the external throttling channel 3 controlled by the #1 adjustable flow valve 2.

[0029] The controller 15 controls the opening of the adjustable flow valve 2, adjustable flow valve 6 and adjustable flow valve 10 in real time to ensure that the total stiffness of the hydraulic spring and the vertical spring 11 connected in parallel during the lowering and lifting of the lifting container 16 is at least 0.1 times the stiffness of the lifting wire rope 8.

[0030] During the lowering and raising of the lifting container 16, the controller 15 controls the opening of the adjustable flow valve 6 #2, so that the total dissipative damping force of the adjustable flow valve 6 #2 and the built-in throttling groove 14 in real time is 0.1-0.65 times the elastic force generated by the parallel connection of the liquid-gas spring and the vertical spring 11.

[0031] A semi-active broadband vibration damping device for suppressing vertical vibration of hoisting wire rope in ultra-deep wells is connected between the hoisting wire rope 8 and the hoisting container 16 of the ultra-deep well hoist via upper and lower connecting frames 20 and 21. In the ultra-deep well hoist, a set of semi-active broadband vibration damping devices for suppressing vertical vibration of hoisting wire rope in ultra-deep wells is installed on each hoisting wire rope 8.

[0032] The gas storage tank 1 and the controller 15 are installed on top of the lifting container 16.

[0033] The top of the cylinder 4 is provided with an air inlet 18 and an exhaust port 19, and the external throttling channel 3 is arranged along the side of the cylinder 4.

[0034] like Figure 2 As shown, the upper connecting frame 20 and the lower connecting frame 21 are U-shaped structural components used to realize the transmission and conversion of force. The upper end of the upper connecting frame 20 has an opening through which the lifting wire rope 8 passes, and forms a circular joint 24 with the end of the lifting wire rope 8 for fixed connection. The lower end of the upper connecting frame 20 is fixedly connected to the bottom of the cylinder 4 by bolts 22. The upper end of the lower connecting frame 21 is fixedly connected to the top of the piston rod 7 by bolts 23, and the lower end of the lower connecting frame 21 is connected to the top of the lifting container 16 by bolts 22. The bottom end of the lifting container 16 is connected to the balance tail rope 17.

[0035] like Figure 3 As shown, a semi-active broadband vibration damping device for suppressing the vertical vibration of the hoisting wire rope in an ultra-deep well is connected between the hoisting wire rope 8 and the hoisting container 16 via upper and lower connecting frames 20 and 21. In the ultra-deep well hoist, a set of semi-active broadband vibration damping devices for suppressing the vertical vibration of the hoisting wire rope in an ultra-deep well is installed on each hoisting wire rope 8.

[0036] The following uses the lowering and raising process of an ultra-deep well hoist as an example to further illustrate the invention: First, when the ultra-deep well hoist is in its initial position, the bottom of the hoisting container 16 is at the same level as the wellhead. At this time, the ultra-deep well hoist is in a stopped state, and adjustable flow valves 1# 2, 2# 6, and 3# 10 are closed. At this time, the hoisting wire rope 8 only bears static tension, and the balance tail rope 16 is the longest and heaviest. At the same time, the static tension on the hoisting wire rope 8 is the greatest, and its length is the shortest, so the stiffness of the hoisting wire rope 8 is the greatest. At this time, the hydro-gas spring formed by nitrogen 5 and hydraulic oil 12 in the rod chamber of the cylinder 4 and the vertical spring 11 jointly bear the weight of the gas tank 1, controller 15, hoisting container 16, and balance tail rope 17. A semi-active broadband vibration damping device is installed between the upper connecting frame 20 and the lower connecting frame 21 to convert the pressure of the semi-active broadband vibration damping device into tension. Assuming that the cross-sectional area A and elastic model E of the hoisting wire rope 8 remain constant and obey Hooke's law, the instantaneous stiffness K of the hoisting wire rope 8 of length L can be expressed as:

[0037] (1)

[0038] Assuming the initial length of the hoisting wire rope is L1 and the lowering length is L2, the ratio Ka of the initial hoisting wire rope stiffness K1 to the hoisting wire rope stiffness K2 after the lowering brake can be expressed as:

[0039] (2)

[0040] As can be seen from equations (1) and (2), when the initial length L1 of the lifting wire rope is 50 m and the lowering length L2 reaches 1000 m, 1500 m and 2000 m respectively, the stiffness ratios Ka of the lifting wire rope are 20, 30 and 40 respectively.

[0041] Based on the above calculations, in order to match the stiffness of the lifting wire rope 8 to achieve efficient absorption of vibration energy, and to ensure the stability of the lifting container 16, the total stiffness of the parallel connection of the hydraulic spring and the vertical spring 11 must be less than the stiffness of the lifting wire rope 8, but the total stiffness of the parallel connection of the hydraulic spring and the vertical spring 11 must be at least 0.1 times the stiffness of the initial length L1 of the lifting wire rope 8. At this time, the stiffness of the hydraulic spring is much greater than the stiffness of the vertical spring 11, and the stiffness set for the vertical spring 11 is at least 0.1 times greater than the stiffness when the length of the lifting wire rope 8 is L2 after it has been lowered to the bottom of the well. At this time, the outward extension of the piston rod 7 is at its maximum.

[0042] See Figure 4During the startup process of a semi-active broadband vibration damping device for suppressing vertical vibration of hoisting wire ropes in ultra-deep wells, the hoisting wire rope experiences inertial impact vibration due to a step change in system acceleration, thus bearing a certain alternating load. In this situation, firstly, the controller 15 sends a command to keep the #1 adjustable flow valve 2 and #3 adjustable flow valve 10 continuously open, while the #2 adjustable flow valve 6 closes. However, at this time, the opening area of ​​the #1 and #3 adjustable flow valves 10 is very small. The total stiffness of the parallel hydraulic spring and vertical spring 11 is at least 0.1 times the stiffness of the transient hoisting wire rope 8. The hydraulic spring and vertical spring 11 efficiently absorb the inertial impact energy generated by the hoisting container 16 and the balance tail rope 17. At this time, the hydraulic spring acts as the main energy storage element. The built-in throttling groove 14 and the external throttling channel 3 allow the hydraulic oil in the rodless and rod chambers of the cylinder 4 to flow alternately, rapidly dissipating the energy stored by the hydropneumatic spring and the vertical spring 11. Furthermore, the total dissipation damping force of the adjustable flow valve 2 and the built-in throttling groove 14 is maintained at 0.1-0.65 times the elastic force generated by the parallel connection of the hydropneumatic spring and the vertical spring 11. At this time, the built-in throttling groove 14 acts as the main dissipation element, and the opening area of ​​the adjustable flow valve 2 is much smaller than the area of ​​the piston head throttling groove 14. The piston rod 7 slowly retracts inward, and the oil in the rodless chamber flows into the rod chamber. Through this process, the displacement amplitude of the wire rope is reduced, the vibration time is shortened, and the service life of the wire rope is extended.

[0043] See Figure 5In a semi-active broadband vibration damping device for suppressing vertical vibration of hoisting wire ropes in ultra-deep wells, the set operating curve transitions smoothly during uniform descent without any abrupt changes, and the system does not generate vibration or impact. At this time, the hoisting wire rope 8 mainly bears static tension. However, during high-speed uniform operation, the hoisting wire rope 8 is highly susceptible to external high-frequency disturbances, causing vibration in the entire hoisting system. To match the continuously decreasing stiffness of the hoisting wire rope 8 and isolate its high-frequency vibration, while ensuring the stability of the hoisting container 16, the controller 15 sends a command to keep adjustable flow valves 1# and 3# continuously open and adjustable flow valve 6# closed. The opening areas of the adjustable flow valve 2 (#1) and the third adjustable flow valve 10 (#3) increase proportionally, ensuring that the total stiffness of the hydraulic spring and the vertical spring 11 connected in parallel is at least 0.1 times the stiffness of the lifting wire rope 8. At this time, the damping effect generated by the built-in throttling groove 14 and the external throttling channel 3 gradually decreases, and the total dissipative damping force of the adjustable flow valve 2 (#1) and the built-in throttling groove 14 is maintained at 0.1-0.65 times the elastic force generated by the hydraulic spring and the vertical spring 11 connected in parallel. As the lifting container 16 descends at a constant speed, the stiffness of the hydraulic spring continues to decrease, the vertical spring 11 continues to extend, and the inward retraction of the piston rod gradually increases. At this time, the hydraulic spring and vertical spring 11 mainly bear the static tension of the static lifting container 16 and the balance tail rope 17. Since the semi-active broadband vibration damping device has small stiffness and large damping characteristics compared with the lifting wire rope 8, the semi-active broadband vibration damping device can reduce and dissipate the transmission of high-frequency vibration of the lifting wire rope 8, play a vibration isolation role, and improve the stability of the operation of the lifting container 16.

[0044] See Figure 6During the braking process of a semi-active broadband vibration damping device for suppressing vertical vibration of hoisting wire ropes in ultra-deep wells, the hoisting container 16 of the ultra-deep well hoist has basically reached the bottom of the well, the stiffness of the hoisting wire rope 8 reaches its minimum, and its static elongation reaches its maximum. Due to the impact of braking inertia, the hoisting wire rope 8 is subjected to alternating dynamic loads, resulting in the maximum amplitude of vibration elongation. At this time, the controller 15 sends a command to open the #1 adjustable flow valve 2 and close the #2 adjustable flow valve 6 and the #3 adjustable flow valve 10. At this time, the total stiffness of the hydraulic-pneumatic spring and the vertical spring 11 connected in parallel is at least 0.1 times the stiffness of the hoisting wire rope 8. The stiffness of the hydraulic-pneumatic spring is the minimum, and the vertical spring 11 mainly bears the static and dynamic tension of the hoisting container 16 and the balance tail rope 17. The total dissipative damping force of the #1 adjustable flow valve 2 and the built-in throttling groove 14 is maintained at 0.1-0.65 times the elastic force generated by the parallel connection of the hydraulic-pneumatic spring and the vertical spring 11. The vertical spring serves as the primary energy storage element, efficiently absorbing inertial impact energy. The built-in throttling groove 14 and the external throttling channel 3 allow hydraulic oil to flow back and forth between the rod-less and rod-side chambers of the cylinder 4, rapidly dissipating the energy stored by the hydraulic spring and the vertical spring 11. The opening area of ​​the #1 adjustable flow valve 2 is much larger than the area of ​​the piston head throttling groove 14, making the #1 adjustable flow valve 2 the primary energy dissipation element. The stiffness of the hydraulic spring reaches its minimum, while the inward retraction of the piston rod 7 reaches its maximum. After braking to a stop, the controller 15 closes the #1 adjustable flow valve 2, the #2 adjustable flow valve 6, and the #3 adjustable flow valve 10.

[0045] See Figure 7 During the start-up process of a semi-active broadband vibration damping device for suppressing vertical vibration of hoisting wire ropes in ultra-deep wells, the controller 15 sends a command to open adjustable flow valves 2 and 6, and close adjustable flow valve 10. Adjustable flow valve 2 opens rapidly to its maximum opening area and then slowly decreases, while adjustable flow valve 6 opens slowly, gradually increasing its opening area. The total stiffness of the vertical spring 11 and the hydraulic spring in parallel is at least 0.1 times the stiffness of the transient hoisting wire rope 8, efficiently absorbing the inertial impact generated by the hoisting container 16 and the balance tail rope 17. The total dissipative damping force of adjustable flow valve 2 and the built-in throttling groove 14 is maintained at 0.1-0.65 times the elastic force generated by the parallel connection of the hydraulic spring and the vertical spring 11. At this time, the vertical spring acts as the main energy storage element. The built-in throttling groove 14 and the external throttling channel allow the hydraulic oil in the rodless and rodless chambers of the cylinder 4 to flow back and forth, quickly dissipating the energy stored by the hydraulic spring and the vertical spring 11. At this time, the #1 adjustable flow valve 2 acts as the main energy dissipation element. At this time, the piston rod 7 slowly extends outward, and the oil in the rodless chamber flows into the rodless chamber.

[0046] See Figure 8In a semi-active broadband vibration damping device for suppressing vertical vibration of hoisting wire ropes in ultra-deep wells, during the uniform upward lifting process, the controller 15 sends a command to open adjustable flow valves 2 and 6 and close adjustable flow valve 10. The opening area of ​​adjustable flow valve 2 continuously decreases proportionally, while the opening area of ​​adjustable flow valve 6 continuously increases proportionally. This ensures that the total stiffness of the hydraulic spring and vertical spring 11 connected in parallel is at least 0.1 times the stiffness of the hoisting wire rope 8, and that the damping effect caused by the built-in throttling groove 14 and the external throttling channel 3 slowly increases. Furthermore, the total dissipative damping force of adjustable flow valve 2 and the built-in throttling groove 14 is maintained at 0.1-0.65 times the elastic force generated by the parallel connection of the hydraulic spring and vertical spring 11. As the hoisting continues at a uniform speed, the stiffness of the hydraulic spring continuously increases, the vertical spring 11 continuously shortens, and the piston rod 7 gradually extends outward. At this time, the hydraulic spring and vertical spring 11 mainly bear the static tension of the static lifting container 16 and the balance tail rope 17, as well as isolate the high-frequency disturbance from the lifting wire rope 8, reduce the high-frequency vibration of the lifting container 16, and improve the comfort of riding.

[0047] See Figure 9 In a semi-active broadband vibration damping device for vertical vibration of hoisting wire ropes in ultra-deep wells, during the braking process of hoisting, the controller 15 sends a command to open adjustable flow valves 2 and 6 and close adjustable flow valve 10. The opening area of ​​adjustable flow valve 2 decreases proportionally, approaching the closed state, and the opening area of ​​adjustable flow valve 6 decreases, approaching the closed state. The total stiffness of the hydraulic spring and vertical spring 11 connected in parallel is at least 0.1 times the stiffness of the transient hoisting wire rope 8, and the hydraulic spring and vertical spring 11 efficiently absorb inertial impact energy. At this time, the hydraulic spring acts as the main energy storage element. The built-in throttling groove 14 and the external throttling channel 3 allow the hydraulic oil in the rodless and rodless chambers of the cylinder 4 to flow back and forth, quickly dissipating the energy stored by the hydraulic spring and vertical spring 11. At this time, the built-in throttling groove 14 acts as the main dissipation element, the piston rod 7 extends outward, and the oil in the rodless chamber flows into the rodless chamber. When the brake comes to a stop, the controller 15 closes the adjustable flow valve 2, the adjustable flow valve 6, and the adjustable flow valve 10, and the piston rod 7 extends outward to its maximum extent.

[0048] At this point, the ultra-deep well hoist has completed a full cycle of lowering and raising.

[0049] This invention utilizes a semi-active broadband vibration damping device, connected in series, to effectively match the time-varying broadband characteristics of ultra-deep well hoisting wire ropes. This achieves efficient absorption and rapid dissipation of inertial impact energy generated during the start-up and braking of the hoist, reducing the vibration displacement amplitude and duration of the wire rope, thus extending its service life. Simultaneously, this damping device effectively isolates high-frequency disturbances from the hoisting wire rope, improving the stability of the hoisting container's operation.

Claims

1. A semi-active broadband vibration damping device for suppressing vertical vibration of hoisting wire ropes in ultra-deep wells, characterized in that: include: The system comprises a gas storage tank, a controller, adjustable flow valves #1, #2, and #3, a cylinder body, a piston head, a vertical spring, a piston rod, an external throttling channel, an upper connecting frame, and a lower connecting frame. The piston head is cylindrical, with several vertically penetrating internal throttling grooves evenly distributed along its circumference. The ratio of the diameter of the internal throttling grooves to the diameter of the piston head is 1:50-1:

20. The gas storage tank is connected to the inlet of adjustable flow valve #2 via a pipeline, and the outlet of adjustable flow valve #2 is connected to the air inlet of the cylinder body via a pipeline. The controller is connected to adjustable flow valves #1, #2, and #3 via control circuits. The external throttling channel is an independent flow channel located outside the cylinder body, with one end connected to the rod chamber of the cylinder body and the other end connected to the non-rod chamber of the cylinder body. The rod chamber is connected, and the #1 adjustable flow valve is installed in the external throttling channel; one end of the #3 adjustable flow valve is connected to the exhaust port of the cylinder, and the other end is connected to the external exhaust port, which is an open exhaust port to the atmosphere; the rod chamber of the cylinder is filled with nitrogen, and the nitrogen interacts with the hydraulic oil in the rod chamber to form a hydro-pneumatic spring in the rod chamber; a vertical spring is installed on the part of the piston rod inside the cylinder in the rod chamber, and the vertical spring and the hydro-pneumatic spring composed of nitrogen and hydraulic oil in the rod chamber are connected in parallel. During the reciprocating stroke of the piston head, the rodless chamber, the external throttling channel, and the built-in throttling groove are all filled with hydraulic oil. When the piston head moves up and down, the hydraulic oil in the rod chamber and the rodless chamber of the cylinder interacts through the built-in throttling groove on the piston head and the external throttling channel controlled by the #1 adjustable flow valve; The controller controls the opening of adjustable flow valves #1, #2, and #3 in real time to ensure that the total stiffness of the parallel hydraulic spring and vertical spring during the lowering and lifting of the lifting container is at least 0.1 times the stiffness of the lifting wire rope. During the lowering and raising of the container, the controller controls the opening of the #2 adjustable flow valve so that the total dissipation damping force of the #2 adjustable flow valve and the built-in throttling groove is 0.1-0.65 times the elastic force generated by the parallel connection of the hydraulic spring and the vertical spring. A semi-active broadband vibration damping device for suppressing vertical vibration of hoisting wire ropes in ultra-deep wells is connected between the hoisting wire ropes and the hoisting container of an ultra-deep well hoist via upper and lower connecting frames. In the ultra-deep well hoist, a set of semi-active broadband vibration damping devices for suppressing vertical vibration of hoisting wire ropes in ultra-deep wells is installed on each hoisting wire rope.

2. The semi-active broadband vibration damping device for suppressing vertical vibration of hoisting wire ropes in ultra-deep wells according to claim 1, characterized in that: The gas storage tank and controller are installed on top of the lifting container.

3. The semi-active broadband vibration damping device for suppressing vertical vibration of hoisting wire ropes in ultra-deep wells according to claim 1, characterized in that: The top of the cylinder block is provided with an air inlet and an exhaust outlet, and the external throttling channel is arranged along the side of the cylinder block.

4. The semi-active broadband vibration damping device for suppressing vertical vibration of hoisting wire ropes in ultra-deep wells according to claim 1, characterized in that: The upper and lower connecting frames are U-shaped structures used to transmit and convert force. The upper end of the upper connecting frame has an opening through which the lifting wire rope passes and forms a circular joint with the end of the lifting wire rope for fixed connection. The lower end of the upper connecting frame is fixed to the bottom of the cylinder body by bolts. The upper end of the lower connecting frame is fixed to the top of the piston rod by bolts, and the lower end of the lower connecting frame is fixed to the top of the lifting container by bolts. The bottom end of the lifting container is connected to a balance tail rope.

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