Adaptive adjustment of magnetorheological fluid disc damper

Abstract

The application provides a self-adaptive adjusting magnetorheological fluid disc damper and belongs to the technical field of rolling mill damping devices. It comprises a shell, a cam arranged in the shell, a shaft hole arranged on the cam, a plurality of magnetorheological fluid damping mechanisms distributed along the circumferential direction between the shell and the cam, a first magnetorheological fluid damper, a first piston rod of the first magnetorheological fluid damper in contact with the cam, a sliding rheostat arranged on one side of the first piston rod, the sliding rheostat connected to a power supply module, the sliding rheostat electrically connected to a first excitation coil module of the first magnetorheological fluid damper, and the first magnetorheological fluid damper connected to a cooling mechanism. The application has the advantages of simple structure, self-adaptive adjustment of the size of the magnetorheological fluid damping according to different degrees, intensities and frequencies of torsional vibration, smooth and reliable damping function, small displacement and large damping, continuous adjustable damping force, accurate real-time control, low noise, fast response speed and low energy consumption.

Description

Technical Field

[0001] This invention belongs to the technical field of rolling mill vibration reduction devices, and relates to an adaptive adjustable magnetorheological fluid disc vibration damper. Background Technology

[0002] Rolled products are metallic materials processed through rolling technology, possessing excellent mechanical and processing properties, and are widely used in the construction, automotive, shipbuilding, and energy industries. The rolling process is one of the most crucial processes in metal forming. During rolling, severe vibrations in the rolling mill significantly affect the surface quality and production level of the rolled metal. When vibrations exceed the set allowable range, products that fail to meet standards in shape, size, and surface quality will be produced. Furthermore, vibrations can loosen internal parts and components of the rolling mill, leading to accelerated wear and even breakage or detachment, severely impacting the normal operation of the rolling mill. In the rolling process, sudden load changes can cause unstable torsional vibrations in the main drive system of the rolling mill. This results in alternating bright and dark stripes perpendicular to the rolling direction on the strip surface, and in severe cases, can damage the main drive system, rendering it inoperable. Therefore, researching how to reduce and suppress vibrations during the rolling process is of paramount importance.

[0003] In the field of rolling mill vibration, there are relatively few devices for reducing torsional vibration, and their applications are quite limited, with some functional deficiencies. Currently, most vibration dampers use springs and rubber rings to absorb vibration, but they cannot respond promptly to vibrations with varying loads and frequencies, and can only absorb a fixed portion of the vibration, resulting in significant wear and tear on the entire damper itself. Some vibration dampers use electromagnetic fields for damping, but when continuously in operation, the heat dissipation problem of the magnetic sensitive material cannot be solved, leading to a gradual decrease in damping efficiency and poor overall reliability. Summary of the Invention

[0004] The purpose of this invention is to address the above-mentioned problems by providing an adaptive adjustable magnetorheological fluid disc damper.

[0005] To achieve the above objectives, the present invention adopts the following technical solutions:

[0006] An adaptive adjustable magnetorheological fluid disc damper includes a housing, a cam inside the housing, a shaft hole on the cam, and a plurality of magnetorheological fluid damping mechanisms distributed circumferentially between the housing and the cam. Each magnetorheological fluid damping mechanism includes a first magnetorheological fluid damper, the first piston rod of which contacts the cam, a sliding rheostat connected to one side of the first piston rod, the sliding rheostat being connected to a power supply module and electrically connected to the first excitation coil module of the first magnetorheological fluid damper, and the first magnetorheological fluid damper being connected to a cooling mechanism.

[0007] The shaft hole on the cam is used to connect with the main drive shaft. When the first piston rod moves outward, the first magnetorheological fluid damper can convert the mechanical energy generated by vibration into the heat energy generated by the damping flow of the magnetorheological fluid. As the first piston rod moves outward, the resistance of the sliding rheostat decreases, and the current through the first excitation coil module increases, making the magnetorheological fluid more like a solid with greater damping, which hinders the outward movement of the first piston rod and forms a negative feedback system to slow down the outward movement speed of the first piston rod when the main drive shaft experiences strong torsional vibration. It can adaptively adjust the magnitude of the magnetorheological fluid damping for torsional vibrations of different degrees, intensities, and frequencies, and smoothly and reliably achieve the vibration reduction function. The cooling mechanism plays a role in cooling the magnetorheological fluid damping mechanism and extending its service life.

[0008] In the aforementioned adaptive adjustable magnetorheological fluid disc damper, four magnetorheological fluid damping mechanisms are provided between the outer shell and the cam, evenly distributed along the circumference. The cam is elliptical in shape, with a spline in the shaft hole. The first piston rod is sleeved on the guide shaft cylinder, and an elastic element is provided between the guide shaft cylinder and the first piston rod.

[0009] The main drive shaft is connected to the cam drive through the spline in the cam shaft hole. When the main drive shaft rotates and drives the cam to rotate, it pushes the two first piston rods perpendicular to the cam direction to move outward at both ends. At this time, the elastic element in the guide shaft cylinder plays a buffering and vibration absorption role. Under the action of the elastic element, the first piston rod always remains tightly connected to the cam.

[0010] In the aforementioned adaptive adjustable magnetorheological fluid disc damper, the first magnetorheological fluid damper includes a triangular first movable shell, a triangular first fixed shell that is sealed and movably connected to the first movable shell, a first magnetorheological fluid cavity between the first movable shell and the first fixed shell, and magnetorheological fluid in the first magnetorheological fluid cavity. One vertex of the first movable shell is set inward and connected to a cam. A triangular heat exchange cavity is provided inside the first fixed shell, and three first excitation coil modules that are respectively connected to three surfaces of the first fixed shell are provided in the heat exchange cavity. The first excitation coil modules are electrically connected to a sliding rheostat. The first fixed shell is connected to a cooling mechanism.

[0011] When the first piston rod, perpendicular to the cam direction, is pushed outward, it causes the first movable shell to move outward while the first fixed shell remains stationary. During the outward movement of the first movable shell, the magnetorheological fluid inside the first magnetorheological fluid chamber undergoes shear flow, forming a small shear mode for vibration damping and absorption. This converts the mechanical energy generated by vibration into heat energy generated by the damped flow of the magnetorheological fluid. Furthermore, as the first piston rod moves outward, the resistance of the sliding rheostat decreases, increasing the current through the first excitation coil module. This increases the damping of the magnetorheological fluid as it transforms into a solid-like substance, slowing down the outward movement of the first piston rod. Simultaneously, water... The first piston rod, parallel to the cam direction, begins to fall back under the reset action of the elastic element, causing the first movable shell to move inward. The resistance of the corresponding sliding rheostat in the horizontal direction increases, the current through the first excitation coil module decreases, and the solid damping of the magnetorheological fluid decreases. During the inward movement of the first movable shell, the first fixed shell remains stationary, and the bottom of the first movable shell is squeezed inward. The magnetorheological fluid in the first magnetorheological fluid cavity flows inward from both the upper and lower ends of the first magnetorheological fluid cavity, forming a squeezing mode magnetorheological fluid vibration absorption and damping, which can form a small motion with large damping, providing a large damping force for vibration absorption over a short distance.

[0012] In the aforementioned adaptive adjustable magnetorheological fluid disc damper, the cooling mechanism includes a heat exchange fluid disposed in a heat exchange chamber. The two ends of the heat exchange chamber are sealed by sealing plates, and the heat exchange chamber is connected to a heat dissipation assembly. The heat dissipation assembly includes an inlet and an outlet disposed on the sealing plate and communicating with the heat exchange chamber. The inlet of the sealing plate is connected to the outlet of the sealing plate on the circumferentially adjacent side by a heat dissipation copper pipe, and a circulation pump is connected to one of the heat dissipation copper pipes.

[0013] The sealing plates at both ends of the heat exchange chamber serve a sealing function, and adjacent heat exchange chambers are interconnected through heat dissipation copper pipes, which can effectively cool the heat exchange chambers and extend the service life of the magnetorheological fluid vibration damping mechanism.

[0014] In the aforementioned adaptive adjustable magnetorheological fluid disc damper, a base is provided between two adjacent magnetorheological fluid damping mechanisms. The outer end of the base is connected to the outer shell, and the inner end of the base is provided with a circuit control chamber. An electrical control module is provided in the circuit control chamber. The electrical control module is electrically connected to the sliding rheostat and the circulating pump. The circulating pump is provided in one of the bases.

[0015] The base is used to support the internal structure and enhance the stability of the overall structure. The electrical control module is electrically connected to the sliding rheostat and the circulating pump to control the flow of the heat exchange fluid.

[0016] In the aforementioned adaptive adjustable magnetorheological fluid disc damper, the first movable shell is in the shape of an isosceles triangle, and the shape of the first fixed shell matches it. Second magnetorheological fluid dampers are provided on both sides of the first movable shell. The second piston rod of the second magnetorheological fluid damper is connected to the rear end of the side of the first movable shell, and the second excitation coil module of the second magnetorheological fluid damper is electrically connected to the sliding rheostat.

[0017] When the first piston rod is pushed outward, it causes the first movable shell to move outward, which in turn causes the second piston rod to move synchronously. The second magnetorheological fluid damper can also convert the mechanical energy generated by the vibration into the heat energy generated by the damped flow of the magnetorheological fluid. At the same time, the second excitation coil module is electrically connected to the sliding rheostat. As the first piston rod moves outward, the resistance of the sliding rheostat decreases, which increases the current through the second excitation coil module. This increases the damping of the magnetorheological fluid as it transforms into a solid-like substance, thus slowing down the outward movement speed of the second piston rod.

[0018] In the aforementioned adaptive adjustable magnetorheological fluid disc damper, the second piston rod is connected to the rear end of the side of the first movable shell via a connecting rod, and the two ends of the connecting rod are respectively connected to the second piston rod and the first movable shell via hinge structures.

[0019] The second piston rod is connected to the first movable shell via a connecting rod, forming a unified whole that moves simultaneously.

[0020] In the aforementioned adaptive adjustable magnetorheological fluid disc damper, the second magnetorheological fluid damper includes a second valve body, which contains a second magnetorheological fluid chamber. The second magnetorheological fluid chamber contains magnetorheological fluid, a second piston, and the excitation coil module. The second piston is connected to the second piston rod of the second valve body, and the second excitation coil module is connected to the second valve body.

[0021] The outward movement of the first piston rod causes the second piston on the second piston rod to push into the second magnetorheological fluid chamber, so that the second magnetorheological fluid chamber forms a small valve mode (flow mode) to absorb and reduce vibration, and in the same way, the mechanical energy generated by the vibration is converted into the heat energy generated by the damped flow of the magnetorheological fluid.

[0022] In the aforementioned adaptive adjustable magnetorheological fluid disc damper, two second magnetorheological fluid dampers are connected to the auxiliary liquid tank. A one-way valve is provided between each of the second magnetorheological fluid dampers and the auxiliary liquid tank. A liquid-blocking ball is provided at the end of the one-way valve facing the second magnetorheological fluid damper. A liquid-blocking spring is provided between the liquid-blocking ball and the one-way valve, and at least one leakage gap is provided between the liquid-blocking ball and the opening.

[0023] When the second piston is pushed into the second magnetorheological fluid chamber, the magnetorheological fluid in the chamber flows to the secondary chamber through the one-way valve, forming a small valve mode (flow mode) for vibration absorption and reduction.

[0024] In the aforementioned adaptive adjustable magnetorheological fluid disc damper, a nitrogen tank is provided between the auxiliary liquid tank and the first magnetorheological fluid chamber. The nitrogen tank is connected to an air inlet, which is located on the outer shell. Electromagnetic valves are provided between the air inlet, the auxiliary liquid tank, the first magnetorheological fluid chamber, and the nitrogen tank.

[0025] The nitrogen tank is connected to the first magnetorheological fluid chamber and the nitrogen tank by a pipeline. Its function is to compensate for the pressure difference generated by the back and forth flow of the magnetorheological fluid. The solenoid valve is used to control the opening and closing of the pipeline.

[0026] Compared with existing technologies, the advantages of this invention are: 1. Simple structure, capable of adaptively adjusting the damping of the magnetorheological fluid for torsional vibrations of different degrees, intensities, and frequencies, achieving stable and reliable vibration reduction. 2. Successfully combining three working modes of the magnetorheological fluid—valve mode (flow mode), shear mode, and extrusion mode—with a simple structure, fully utilizing the advantages of each mode to achieve numerous advantages such as large damping with small displacement, continuously adjustable damping force with precise real-time control, low noise, fast response speed, and low energy consumption. 3. Considering the significant impact of temperature on the viscosity of the magnetorheological fluid, which in turn affects its rheological properties and yield stress, a cooling mechanism is included to effectively cool the device and extend its service life. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the overall structure provided by the present invention;

[0028] Figure 2 This is a cross-sectional view of the overall structure provided by the present invention;

[0029] Figure 3 This is a cross-sectional view of the liquid storage chamber;

[0030] Figure 4 This is a schematic diagram of a one-way valve;

[0031] Figure 5 This is a schematic diagram of the leakage gap structure;

[0032] Figure 6 This is a circuit diagram illustrating the working principle of the circuit control room of this invention;

[0033] Figure 7 This is a control workflow diagram of the circuit control room of the present invention.

[0034] In the diagram, 1 is the outer casing, 2 is the cam, 3 is the shaft hole, 4 is the magnetorheological fluid damping mechanism, 5 is the first magnetorheological fluid damper, 6 is the first piston rod, 7 is the sliding rheostat, 8 is the second magnetorheological fluid damper, 9 is the first excitation coil module, 10 is the cooling mechanism, 11 is the guide shaft cylinder, 12 is the elastic element, 13 is the first movable shell, 14 is the first fixed shell, 15 is the heat exchange chamber, 17 is the first magnetorheological fluid chamber, 18 is the sealing plate, 19 is the heat dissipation assembly, 20 is the liquid inlet, 21 is the liquid outlet, 22 is the heat dissipation copper pipe, and 23 is the circulation. Pump 23, liquid storage chamber 24, liquid storage cavity 25, liquid injection port 26, two-position three-way solenoid valve 27, base body 28, circuit control chamber 29, second piston rod 31, second excitation coil module 32, connecting rod 33, hinge structure 34, second valve body 35, second magnetorheological fluid cavity 36, auxiliary liquid tank 37, one-way valve 38, conduction port 39, liquid-blocking ball 40, liquid-blocking spring 41, leakage gap 42, conduction inlet 43, conduction outlet 44, nitrogen tank 45, air inlet 46. Detailed Implementation

[0035] like Figure 1 and Figure 2 As shown, an adaptive adjustable magnetorheological fluid disc damper includes a housing 1, a cam 2 inside the housing 1, a shaft hole 3 on the cam 2, and several magnetorheological fluid damping mechanisms 4 distributed circumferentially upward between the housing 1 and the cam 2. The magnetorheological fluid damping mechanism 4 includes a first magnetorheological fluid damper 5, a first piston rod 6 of the first magnetorheological fluid damper 5 in contact with the cam 2, a sliding rheostat 7 connected to one side of the first piston rod 6, the sliding rheostat 7 being connected to a power supply module, and the sliding rheostat 7 being electrically connected to the first excitation coil module 9 of the first magnetorheological fluid damper 5. The first magnetorheological fluid damper 5 is connected to a cooling mechanism 10.

[0036] In this invention, the main drive shaft is connected to the cam 2 through the shaft hole 3. When the main drive shaft rotates, it drives the cam 2 to rotate. When the cam 2 rotates, it pushes the first piston rod 6 to move outward at both ends. During the outward movement of the first piston rod 6, the resistance of the sliding rheostat 7 gradually decreases, causing the current through the first excitation coil module 9 to gradually increase.

[0037] The shaft hole 3 on the cam 2 is used to connect with the main drive shaft. When the first piston rod 6 moves outward, the first magnetorheological fluid damper 5 can convert the mechanical energy generated by vibration into the heat energy generated by the damping flow of the magnetorheological fluid. As the first piston rod 6 moves outward, the resistance of the sliding rheostat 7 becomes smaller, and the current through the first excitation coil module 9 becomes larger, making the magnetorheological fluid transform into a solid-like damping, which hinders the outward movement of the first piston rod 6 and forms a negative feedback system to slow down the outward movement speed of the first piston rod 6 when the main drive shaft experiences strong torsional vibration. It can adaptively adjust the magnitude of the magnetorheological fluid damping for torsional vibrations of different degrees, intensities, and frequencies, and smoothly and reliably achieve the vibration reduction function. The cooling mechanism 10 plays a role in cooling the magnetorheological fluid damping mechanism 4 and extending its service life.

[0038] Specifically, combining Figure 1 and Figure 2 As shown, four magnetorheological damping mechanisms 4 are provided between the outer shell 1 and the cam 2, evenly distributed along the circumference. The cam 2 is elliptical, and a spline is provided in the shaft hole 3. The first piston rod 6 is sleeved on the guide shaft cylinder 11, and an elastic element 12 is provided between the guide shaft cylinder 11 and the first piston rod 6.

[0039] The main drive shaft is connected to the cam 2 via a spline in the shaft hole of the cam 2. When the main drive shaft rotates and drives the cam 2 to rotate, it pushes the two first piston rods 6 perpendicular to the cam 2 to move outward at both ends. At this time, the elastic element 12 in the guide shaft cylinder 11 plays a buffering and vibration absorption role. Under the action of the elastic element 12, the first piston rods 6 always remain tightly connected to the cam 2.

[0040] Specifically, combining Figure 2 As shown, the elastic element 12 is a spring. One end of the elastic element 12 abuts against the first piston rod 6, and the other end abuts against the guide shaft cylinder 11. The end of the guide shaft cylinder 11 is provided with a positioning step for positioning the spring. When the first piston rod 6 moves outward, the spring is compressed to buffer and absorb vibration. When the vibration disappears, it resets the first piston rod 6. Under the action of the spring, the first piston rod 6 always remains tightly connected to the cam 2.

[0041] Specifically, combining Figure 1 and Figure 2As shown, the first magnetorheological fluid damper 5 includes a triangular first movable shell 13. The inner side of the first movable shell 13 is provided with a triangular first fixed shell 14 that is sealed and movably connected to it. A first magnetorheological fluid cavity 17 is provided between the first movable shell 13 and the first fixed shell 14. Magnetorheological fluid is provided in the first magnetorheological fluid cavity 17. One vertex of the first movable shell 13 is arranged inward and connected to the cam 2. The inner side of the first fixed shell 14 is provided with a triangular heat exchange cavity 15. Three first excitation coil modules 9 are respectively connected to the three surfaces of the first fixed shell 14 in the heat exchange cavity 15. The first excitation coil modules 9 are electrically connected to the sliding rheostat 7. The first fixed shell 14 is connected to the cooling mechanism 10.

[0042] When the first piston rod 6 located in the long axis direction of cam 2 is pushed outward, it drives the first movable shell 13 to move outward, while the first fixed shell 14 remains stationary. During the outward movement of the first movable shell 13, the magnetorheological fluid inside the first magnetorheological fluid cavity 17 undergoes shear flow, forming a small shear mode to reduce vibration and absorb shock, converting the mechanical energy generated by vibration into the heat energy generated by the damped flow of the magnetorheological fluid. Furthermore, as the first piston rod 6 moves outward, the resistance of the sliding rheostat 7 decreases, causing the current through the first excitation coil module 9 to increase, which can increase the damping of the magnetorheological fluid into a solid-like state and slow down the outward movement speed of the first piston rod 6.

[0043] Simultaneously, the first piston rod 6 located in the short axis direction of cam 2 begins to fall back under the reset action of elastic element 12, driving the first movable shell 13 to move inward. The resistance of the corresponding sliding rheostat 7 in the horizontal direction increases, the current through the first excitation coil module 9 decreases, the damping of the magnetorheological fluid-like solid decreases, and during the inward movement of the first movable shell 13, the first fixed shell 14 remains stationary, the bottom of the first movable shell 13 is squeezed inward, and the magnetorheological fluid in the first magnetorheological fluid cavity 17 flows inward from the upper and lower ends of the first magnetorheological fluid cavity 17, forming a squeezing mode magnetorheological fluid vibration absorption and damping, which can form small motion with large damping, and provide a large damping force for vibration absorption in a short distance;

[0044] If the generated torsional vibration continues to torsion the main drive shaft, the cam 2 continues to rotate, the first piston rod 6 in the vertical direction falls back, and the first piston rod 6 in the horizontal direction moves outward. The magnetorheological fluid in the horizontal direction becomes a high-damping solid, and the first magnetorheological fluid damper 5 in the horizontal direction becomes the main buffer device. The first magnetorheological fluid dampers 5 in the vertical and horizontal directions work alternately in sequence, giving sufficient time to dissipate heat, so that the workpiece performance is stable and the service life is extended. The cooling mechanism 10 plays the role of cooling the magnetorheological fluid damping mechanism 4 and extending its service life.

[0045] Specifically, combining Figure 2 and Figure 3As shown, the cooling mechanism 10 includes a heat exchange fluid disposed in a heat exchange chamber 15. The two ends of the heat exchange chamber 15 are sealed by a sealing plate 18. The heat exchange chamber 15 is connected to a heat dissipation assembly 19. The heat dissipation assembly 19 includes an inlet 20 and an outlet 21 disposed on the sealing plate 18 and communicating with the heat exchange chamber 15. The inlet 20 of the sealing plate 18 and the outlet 21 of the sealing plate 18 on the circumferentially adjacent side are connected by a heat dissipation copper pipe 22, and a circulation pump 23 is connected to one of the heat dissipation copper pipes 22.

[0046] The sealing plates 18 at both ends of the heat exchange chamber 15 serve a sealing function. Adjacent heat exchange chambers 15 are interconnected through heat dissipation copper pipes 22, which can effectively cool the heat exchange chamber 15 and extend the service life of the magnetorheological fluid vibration damping mechanism 4.

[0047] Specifically, combining Figures 1-3 As shown, a liquid storage chamber 24 is connected to the circulating pump 23, and the circulating pump 23 is connected to the heat dissipation copper pipe 22 through a solenoid valve; a refrigeration module is also connected to the liquid storage chamber 24; the liquid storage chamber 24 includes a liquid storage cavity 25, which contains heat exchange liquid, and an injection port 26 connected to the liquid storage cavity 25 is opened on the outer shell 1. The circulating pump 23 ensures the back-and-forth flow of heat exchange liquid between the heat exchange cavity 15 and the liquid storage cavity 25, accelerating heat exchange and heat dissipation. In addition, the circulating pump 23 is connected to a solenoid valve to control the flow of heat exchange liquid. The solenoid valve is a two-position three-way solenoid valve 27.

[0048] Specifically, combining Figure 2 and Figure 3 As shown, a base 28 is provided between two adjacent magnetorheological fluid vibration damping mechanisms 4. The outer end of the base 28 is connected to the outer shell 1, and the inner end of the base 28 is provided with a circuit control chamber 29. An electrical control module is provided in the circuit control chamber 29. The electrical control module is electrically connected to the sliding rheostat 7 and the circulating pump 23. The circulating pump 23 is provided in one of the bases 28.

[0049] The base 28 supports the internal structure and enhances the overall stability. The electrical control module is electrically connected to the sliding rheostat 7 and the circulating pump 23 to control the flow of the heat exchange fluid. The base 28 also contains a two-position three-way solenoid valve 27, a liquid storage chamber 24, and a refrigeration module.

[0050] Specifically, combining Figure 6 and Figure 7As shown, C1 represents the first capacitor plate, C2 represents the second capacitor plate, VT represents the transistor, L1 represents the first excitation coil module 9, resistor Rb ensures the static operating point, Rl is the circulation pump 23 in the liquid storage chamber 24, the transistor forms a common collector circuit, Rs is the sliding rheostat 7, a voltmeter U is connected across the sliding rheostat 7 to measure the reading, this value can be used to adjust the initial distance of one end of the sliding rheostat 7, adjust the sensitivity and initial damping strength of the whole device, and can also be used to analyze the induced frequency of torsional vibration. When the device starts working, it drives the sliding rheostat 7 to slide. First, the current in L1 begins to change in response, generating a dynamically changing and adaptive magnetic field in the first magnetorheological fluid chamber 17. As the resistance of the sliding rheostat 7 changes, the base of the transistor meets the requirement of being greater than or equal to the conduction voltage (0.7V for silicon transistors and 0.3V for germanium transistors). The transistor is in the conducting state, and the circulating pump R1 starts to operate, causing the heat exchange fluid in the heat exchange chamber 15 and the liquid storage chamber 25 to circulate through the heat dissipation copper pipe 22, accelerating heat dissipation.

[0051] Specifically, combining Figure 1 and Figure 2 As shown, the first movable shell 13 is in the shape of an isosceles triangle, and the shape of the first fixed shell 14 matches it. A second magnetorheological fluid damper 8 is provided on both sides of the first movable shell 13. The second piston rod 31 of the second magnetorheological fluid damper 8 is connected to the rear end of the side of the first movable shell 13, and the second excitation coil module 32 of the second magnetorheological fluid damper 8 is electrically connected to the sliding rheostat 7.

[0052] When the first piston rod 6 is pushed outward, it causes the first movable shell 13 to move outward, which in turn causes the second piston rod 31 to move synchronously. The second magnetorheological fluid damper 8 can also convert the mechanical energy generated by vibration into the heat energy generated by the damped flow of the magnetorheological fluid. At the same time, the second excitation coil module 32 is electrically connected to the sliding rheostat 7. As the first piston rod 6 moves outward, the resistance of the sliding rheostat 7 decreases, which increases the current through the second excitation coil module 32. This increases the damping of the magnetorheological fluid as it transforms into a solid-like substance, thus slowing down the outward movement speed of the second piston rod 31.

[0053] Preferably, combined with Figure 2 As shown, the second piston rod 31 is connected to the rear end of the side of the first movable shell 13 via a connecting rod 33. The two ends of the connecting rod 33 are connected to the second piston rod 31 and the first movable shell 13 via a hinge structure 34, respectively.

[0054] The second piston rod 31 is connected to the first movable housing 13 via a connecting rod 33, forming a single unit that moves simultaneously. The hinge structure 34 is existing technology and will not be described in detail.

[0055] Specifically, combining Figure 2As shown, the second magnetorheological fluid damper 8 includes a second valve body 35, in which a second magnetorheological fluid chamber 36 is provided. In the second magnetorheological fluid chamber 36, magnetorheological fluid, a second piston and the excitation coil module 32 are provided. The second piston is connected to the second piston rod 31 of the second valve body 35, and the second excitation coil module 32 is connected to the second valve body 35.

[0056] The outward movement of the first piston rod 6 causes the second piston on the second piston rod 31 to push into the second magnetorheological fluid chamber 36, so that the second magnetorheological fluid chamber 36 forms a small valve mode (flow mode) to absorb and reduce vibration, and also converts the mechanical energy generated by vibration into the heat energy generated by the damped flow of magnetorheological fluid.

[0057] Specifically, combining Figure 2 , Figure 4 and Figure 5 As shown, two second magnetorheological fluid dampers 8 are connected to the auxiliary liquid tank 37. A one-way valve 38 is provided between the second magnetorheological fluid damper 8 and the auxiliary liquid tank 37. A liquid-blocking ball 40 is provided at the end of the one-way valve 38 facing the second magnetorheological fluid damper 8 through the guide port 39. A liquid-blocking spring 41 is provided between the liquid-blocking ball 40 and the one-way valve 38, and at least one leakage gap 42 is provided between the liquid-blocking ball 40 and the guide port 39.

[0058] When the second piston is pushed into the second magnetorheological fluid chamber 36, the magnetorheological fluid in the chamber flows to the secondary chamber through the one-way valve 38, forming a small valve mode (flow mode) to absorb and reduce vibration. The one-way valve 38 has a conduction port 39 including a conduction inlet 43 and a conduction outlet 44.

[0059] Preferably, combined with Figure 4 and Figure 5 As shown, the inlet 43 is square, and four leakage gaps 42 are formed between the four corners of the inlet 43 and the liquid-blocking ball 40. When the second piston is pushed into the second magnetorheological fluid chamber 36, the pressure inside the second magnetorheological fluid chamber 36 increases, and the magnetorheological fluid begins to flow with the pressure. The pressure at the inlet 43 increases, and the magnetorheological fluid pushes away the liquid-blocking ball 40 and presses the liquid-blocking spring 41. The magnetorheological fluid enters the auxiliary liquid tank 37 through the inlet 43. When the second piston is pulled back, the pressure at the inlet 43 decreases, and the pressure at the outlet 44 is greater than the pressure at the inlet 43. The magnetorheological fluid pushes the liquid-blocking ball 40 against the inlet 43. However, since the inlet 43 cannot be completely blocked by the liquid-blocking ball 40, four leakage gaps 42 are formed between the four corners and the liquid-blocking ball 40. Therefore, the magnetorheological fluid slowly returns through the leakage gaps 42, slowing down the fall speed of the second piston and playing a certain role in buffering and absorbing vibration.

[0060] Preferably, combined with Figure 1 and Figure 2As shown, a nitrogen tank 45 is provided between the auxiliary liquid tank 37 and the first magnetorheological fluid chamber 17. An air inlet 46 is connected to the nitrogen tank 45 and is provided on the outer shell 1. Solenoid valves are provided between the air inlet 46, the auxiliary liquid tank 37, the first magnetorheological fluid chamber 17 and the nitrogen tank 45.

[0061] The nitrogen tank 45 is connected to the first magnetorheological fluid chamber 17 and the nitrogen tank 45 by a pipeline. Its function is to compensate for the pressure difference generated by the back and forth flow of the magnetorheological fluid. The solenoid valve is used to control the opening and closing of the pipeline.

[0062] The working principle of this invention is as follows: the main drive shaft is connected to the cam 2 through the shaft hole 3. When the main drive shaft rotates, it drives the cam 2 to rotate. When the cam 2 rotates, it pushes the first piston rod 6 to move outward at both ends. During the outward movement of the first piston rod 6, the resistance of the sliding rheostat 7 gradually decreases, causing the current through the first excitation coil module 9 to gradually increase.

[0063] The shaft hole 3 on the cam 2 is used to connect with the main drive shaft. When the first piston rod 6 moves outward, the first magnetorheological fluid damper 5 can convert the mechanical energy generated by vibration into the heat energy generated by the damping flow of the magnetorheological fluid. As the first piston rod 6 moves outward, the resistance of the sliding rheostat 7 becomes smaller and the current through the first excitation coil module 9 becomes larger, which makes the magnetorheological fluid convert into a solid-like damping, which hinders the outward movement of the first piston rod 6 and forms a negative feedback system to slow down the outward movement speed of the first piston rod 6 when the main drive shaft experiences strong torsional vibration. It can adaptively adjust the magnitude of the magnetorheological fluid damping for torsional vibrations of different degrees, intensities, and frequencies, and smoothly and reliably achieve the vibration reduction function. The cooling mechanism 10 plays the role of cooling the magnetorheological fluid damping mechanism 4 and extending its service life.

[0064] The main drive shaft is connected to the cam 2 via a spline in the shaft hole of the cam 2. When the main drive shaft rotates and drives the cam 2 to rotate, it pushes the two first piston rods 6 perpendicular to the cam 2 to move outward at both ends. At this time, the elastic element 12 in the guide shaft cylinder 11 plays a buffering and vibration absorption role. Under the action of the elastic element 12, the first piston rods 6 always remain tightly connected to the cam 2.

[0065] The elastic element 12 is a spring. One end of the elastic element 12 abuts against the first piston rod 6, and the other end abuts against the guide shaft cylinder 11. The end of the guide shaft cylinder 11 is provided with a positioning step for positioning the spring. When the first piston rod 6 moves outward, the spring is compressed to buffer and absorb vibration. When the vibration disappears, it resets the first piston rod 6. Under the action of the spring, the first piston rod 6 always remains tightly connected to the cam 2.

[0066] When the first piston rod 6, which is perpendicular to the cam 2, is pushed outward, it causes the first movable shell 13 to move outward while the first fixed shell 14 remains stationary. During the outward movement of the first movable shell 13, the magnetorheological fluid inside the first magnetorheological fluid cavity 17 undergoes shear flow, forming a small shear mode to reduce vibration and absorb shock. This converts the mechanical energy generated by the vibration into the heat energy generated by the damped flow of the magnetorheological fluid. Furthermore, as the first piston rod 6 moves outward, the resistance of the sliding rheostat 7 decreases, which increases the current through the first excitation coil module 9. This increases the damping of the magnetorheological fluid as it transforms into a solid-like substance, thus slowing down the outward movement speed of the first piston rod 6.

[0067] Simultaneously, the first piston rod 6, horizontal in the direction of cam 2, begins to fall back under the reset action of the elastic element 12, causing the first movable shell 13 to move inward. The resistance of the sliding rheostat 7 corresponding to the horizontal direction increases, the current through the first excitation coil module 9 decreases, and the damping of the magnetorheological fluid-like solid decreases. During the inward movement of the first movable shell 13, the first fixed shell 14 remains stationary, and the bottom of the first movable shell 13 is squeezed inward. The magnetorheological fluid in the first magnetorheological fluid cavity 17 flows inward from the upper and lower ends of the first magnetorheological fluid cavity 17, forming a squeezing mode magnetorheological fluid vibration absorption and damping, which can form a small motion with large damping and provide a large damping force for vibration absorption in a short distance.

[0068] If the generated torsional vibration continues to torsion the main drive shaft, the cam 2 continues to rotate, the first piston rod 6 in the vertical direction falls back, the first piston rod 6 in the horizontal direction moves outward, the magnetorheological fluid in the horizontal direction becomes a high-damping solid, and the first magnetorheological fluid damper 5 in the horizontal direction becomes the main buffer device. The first magnetorheological fluid dampers 5 in the vertical and horizontal directions work alternately in sequence, giving sufficient time to dissipate heat, so that the workpiece performance is stable and the service life is extended. The cooling mechanism 10 plays the role of cooling the magnetorheological fluid damping mechanism 4 and extending its service life.

[0069] The sealing plates 18 at both ends of the heat exchange chamber 15 serve a sealing function. Adjacent heat exchange chambers 15 are interconnected through heat dissipation copper pipes 22, which can effectively cool the heat exchange chamber 15 and extend the service life of the magnetorheological fluid vibration damping mechanism 4.

[0070] The circulating pump 23 is connected to the liquid storage chamber 24, and the circulating pump 23 is connected to the heat dissipation copper pipe 22 through the solenoid valve. The liquid storage chamber 24 is also connected to the refrigeration module. The liquid storage chamber 24 includes a liquid storage cavity 25, which contains heat exchange liquid. An injection port 26 communicating with the liquid storage cavity 25 is opened on the outer shell 1. The circulating pump 23 ensures the back-and-forth flow of heat exchange liquid between the heat exchange cavity 15 and the liquid storage cavity 25, accelerating heat exchange and heat dissipation. In addition, the circulating pump 23 is connected to the solenoid valve to control the flow of heat exchange liquid. The solenoid valve is a two-position three-way solenoid valve 27.

[0071] The base 28 is used to support the internal structure and enhance the stability of the overall structure. The electrical control module is electrically connected to the sliding rheostat 7 and the circulating pump 23 to control the flow of the heat exchange fluid. The base 28 also contains a two-position three-way solenoid valve 27, a liquid storage chamber 24 and a refrigeration module.

[0072] When the first piston rod 6 is pushed outward, it causes the first movable shell 13 to move outward, which in turn causes the second piston rod 31 to move synchronously. The second magnetorheological fluid damper 8 can also convert the mechanical energy generated by vibration into the heat energy generated by the damped flow of magnetorheological fluid. At the same time, the second excitation coil module 32 is electrically connected to the sliding rheostat 7. As the first piston rod 6 moves outward, the resistance of the sliding rheostat 7 decreases, which increases the current through the second excitation coil module 32. This can increase the damping of the magnetorheological fluid into a solid-like substance and slow down the outward movement speed of the second piston rod 31.

[0073] The outward movement of the first piston rod 6 causes the second piston on the second piston rod 31 to push the second piston into the second magnetorheological fluid chamber 36, so that the second magnetorheological fluid chamber 36 forms a small valve mode (flow mode) to absorb and reduce vibration, and similarly converts the mechanical energy generated by vibration into the heat energy generated by the damped flow of magnetorheological fluid.

[0074] When the second piston is pushed into the second magnetorheological fluid chamber 36, the magnetorheological fluid in the chamber flows to the secondary chamber through the one-way valve 38, forming a small valve mode (flow mode) to absorb and reduce vibration. The one-way valve 38 has a conduction port 39 including a conduction inlet 43 and a conduction outlet 44.

[0075] The inlet 43 is square, and four leakage gaps 42 are formed between the four corners of the inlet 43 and the liquid-blocking ball 40. When the second piston is pushed into the second magnetorheological fluid chamber 36, the pressure in the second magnetorheological fluid chamber 36 increases, and the magnetorheological fluid begins to flow with the pressure. The pressure in the inlet 43 increases, and the magnetorheological fluid pushes away the liquid-blocking ball 40 and presses the liquid-blocking spring 41. The magnetorheological fluid enters the auxiliary liquid tank 37 through the leakage gaps 42. When the second piston is pulled back, the pressure in the inlet 43 decreases, and the pressure at the outlet 44 is greater than the pressure in the inlet 43. The magnetorheological fluid pushes the liquid-blocking ball 40 to block the inlet 43. However, since the inlet 43 cannot be completely blocked by the liquid-blocking ball 40, four leakage gaps 42 are formed between the four corners and the liquid-blocking ball 40. Therefore, the magnetorheological fluid slowly returns through the leakage gaps 42, which slows down the fall speed of the second piston and plays a certain role in buffering and absorbing vibration.

[0076] The nitrogen tank 45 is connected to the first magnetorheological fluid chamber 17 and the nitrogen tank 45 by a pipeline. Its function is to compensate for the pressure difference generated by the back and forth flow of the magnetorheological fluid. The solenoid valve is used to control the opening and closing of the pipeline.

[0077] The specific embodiments described herein are merely illustrative of the spirit of the invention. Those skilled in the art to which this invention pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of the invention or exceeding the scope defined by the appended claims.

[0078] Although this article extensively uses the following components: outer shell 1, cam 2, shaft hole 3, magnetorheological fluid damping mechanism 4, first magnetorheological fluid damper 5, first piston rod 6, sliding rheostat 7, second magnetorheological fluid damper 8, first excitation coil module 9, cooling mechanism 10, guide shaft cylinder 11, elastic element 12, first movable shell 13, first fixed shell 14, heat exchange chamber 15, first magnetorheological fluid chamber 17, sealing plate 18, heat dissipation assembly 19, liquid inlet 20, liquid outlet 21, heat dissipation copper pipe 22, circulation pump 23, liquid storage chamber 24, liquid storage cavity 25, liquid injection port 26, two-position three-position The following components are included: solenoid valve 27, base 28, circuit control chamber 29, second piston rod 31, second excitation coil module 32, connecting rod 33, hinge structure 34, second valve body 35, second magnetorheological fluid chamber 36, auxiliary liquid tank 37, one-way valve 38, conduction port 39, liquid-blocking ball 40, liquid-blocking spring 41, leakage gap 42, conduction inlet 43, conduction outlet 44, nitrogen tank 45, air inlet 46, etc. These terms are used merely for the convenience of describing and explaining the essence of the invention; interpreting them as any additional limitation would contradict the spirit of the invention.

Claims

1. An adaptive adjustable magnetorheological fluid disc damper, comprising a housing (1), characterized in that, The outer casing (1) is provided with a cam (2), and the cam (2) is provided with a shaft hole (3). Between the outer casing (1) and the cam (2), there are several magnetorheological damping mechanisms (4) distributed circumferentially upward. The magnetorheological damping mechanism (4) includes a first magnetorheological damper (5). The first piston rod (6) of the first magnetorheological damper (5) is in contact with the cam (2). A sliding rheostat (7) is provided on one side of the first piston rod (6) and connected to it. The sliding rheostat (7) is connected to the power supply module and is electrically connected to the first excitation coil module (9) of the first magnetorheological damper (5). The first magnetorheological damper (5) is connected to the cooling mechanism (10). The first magnetorheological damper (5) includes A triangular movable shell (13) is provided inside the first movable shell (13), which is triangular and is sealed and connected to the first fixed shell (14). A first magnetorheological fluid cavity (17) is provided between the first movable shell (13) and the first fixed shell (14). Magnetorheological fluid is provided in the first magnetorheological fluid cavity (17). One vertex of the first movable shell (13) is set inward and connected to the cam (2). A triangular heat exchange cavity (15) is provided inside the first fixed shell (14). Three first excitation coil modules (9) are respectively connected to the three surfaces of the first fixed shell (14) in the heat exchange cavity (15). The first excitation coil modules (9) are electrically connected to the sliding rheostat (7). The first fixed shell (14) is connected to the cooling mechanism (10).

2. The adaptive adjustable magnetorheological fluid disc damper according to claim 1, characterized in that, Four magnetorheological damping mechanisms (4) are provided between the outer shell (1) and the cam (2) and are evenly distributed along the circumference. The cam (2) is elliptical and has a spline in the shaft hole (3). The first piston rod (6) is sleeved on the guide shaft cylinder (11) and an elastic element (12) is provided between the guide shaft cylinder (11) and the first piston rod (6).

3. The adaptive adjustable magnetorheological fluid disc damper according to claim 1, characterized in that, The cooling mechanism (10) includes a heat exchange liquid disposed in a heat exchange chamber (15). The two ends of the heat exchange chamber (15) are sealed by a sealing plate (18). The heat exchange chamber (15) is connected to a heat dissipation assembly (19). The heat dissipation assembly (19) includes an inlet (20) and an outlet (21) disposed on the sealing plate (18) and communicating with the heat exchange chamber (15). The inlet (20) of the sealing plate (18) and the outlet (21) of the sealing plate (18) on the circumferentially adjacent side are connected by a heat dissipation copper pipe (22). A circulation pump (23) is connected to one of the heat dissipation copper pipes (22).

4. The adaptive adjustable magnetorheological fluid disc damper according to claim 3, characterized in that, A base (28) is provided between each of the two adjacent magnetorheological damping mechanisms (4). The outer end of the base (28) is connected to the outer shell (1), and the inner end of the base (28) is provided with a circuit control chamber (29). An electrical control module is provided in the circuit control chamber (29). The electrical control module is electrically connected to the sliding rheostat (7) and the circulating pump (23). The circulating pump (23) is provided in one of the bases (28).

5. The adaptive adjustable magnetorheological fluid disc damper according to claim 4, characterized in that, The first movable shell (13) is in the shape of an isosceles triangle, and the shape of the first fixed shell (14) matches it. A second magnetorheological damper (8) is provided on both sides of the first movable shell (13). The second piston rod (31) of the second magnetorheological damper (8) is connected to the rear end of the side of the first movable shell (13), and the second excitation coil module (32) of the second magnetorheological damper (8) is electrically connected to the sliding rheostat (7).

6. The adaptive adjustable magnetorheological fluid disc damper according to claim 5, characterized in that, The second piston rod (31) is connected to the rear end of the side of the first movable shell (13) via a connecting rod (33). The two ends of the connecting rod (33) are connected to the second piston rod (31) and the first movable shell (13) via a hinge structure (34).

7. The adaptive adjustable magnetorheological fluid disc damper according to claim 5, characterized in that, The second magnetorheological fluid damper (8) includes a second valve body (35), and a second magnetorheological fluid chamber (36) is provided inside the second valve body (35). The second magnetorheological fluid chamber (36) is provided with magnetorheological fluid, a second piston and a second excitation coil module (32). The second piston is connected to the second piston rod (31) of the second valve body (35), and the second excitation coil module (32) is connected to the second valve body (35).

8. The adaptive adjustable magnetorheological fluid disc damper according to claim 7, characterized in that, Two second magnetorheological fluid dampers (8) are connected to the auxiliary liquid tank (37). A one-way valve (38) is provided between the second magnetorheological fluid damper (8) and the auxiliary liquid tank (37). A liquid-blocking ball (40) is provided at one end of the one-way valve (38) facing the second magnetorheological fluid damper (8). A liquid-blocking spring (41) is provided between the liquid-blocking ball (40) and the one-way valve (38). At least one leakage gap (42) is provided between the liquid-blocking ball (40) and the one-way valve (39).

9. The adaptive adjustable magnetorheological fluid disc damper according to claim 8, characterized in that, A nitrogen tank (45) is provided between the auxiliary liquid tank (37) and the first magnetorheological fluid chamber (17). An air inlet (46) is connected to the nitrogen tank (45). The air inlet (46) is located on the outer shell (1). Electromagnetic valves are provided between the air inlet (46), the auxiliary liquid tank (37), the first magnetorheological fluid chamber (17), and the nitrogen tank (45).

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