A vibration reduction system for hydraulic screw-down device based on electromagnetic induction

Abstract

The present invention discloses a vibration reduction system for a hydraulic press-down device based on electromagnetic induction, comprising a main vibration reduction assembly and a cylindrical bracket, wherein the main vibration reduction assembly is evenly distributed along the inner circumference of the cylindrical bracket; the main vibration reduction assembly comprises an arc-shaped push rod, a first spring, a piston rod, and a vibration reduction block, wherein one end of the arc-shaped push rod is connected to the piston rod, the vibration reduction block is mounted on the other end of the arc-shaped push rod, and the first spring is mounted on the piston rod. The present invention utilizes electromagnetic induction technology, hydraulic transmission, and control technology to convert vibration kinetic energy into frictional heat energy of the vibration reduction block, elastic potential energy of the vibration reduction block, and elastic potential energy of the middle portion of the arc-shaped push rod, and adjusts the vibration reduction amplitude according to actual vibration conditions, thereby minimizing the loss of the equipment itself, extending the service life of parts such as support rolls and working rolls, improving plate and strip quality, and thereby improving the overall safety of the rolling mill.

Description

Technical Field

[0001] The invention belongs to the field of rolling vibration reduction equipment, and in particular relates to a vibration reduction system of a hydraulic press-down device based on electromagnetic induction. Background Art

[0002] With the development of science and technology, the field of machinery is developing towards high speed and lightweight, and vibration-related problems are constantly emerging. The power source and the mechanical structure are in contact with each other, and a large number of vibration types are constantly emerging. In the field of rolling mill vibration, the mechanical vibration generated by the rolling mill is also one of the important factors affecting the quality of the rolling mill plate. A large number of test studies have shown that the hot rolling mill is mainly caused by the torsional vibration brought by the motor as the power source, and the cold rolling mill is mainly caused by the vertical vibration brought by the hydraulic pressure system. In actual production, the rolling mill pressure device provides vertical force to the support roll. The support roll is in direct contact with the work roll, and the work roll is in direct contact with the plate. The vibration of the support roll will directly affect the quality of the plate. In addition, the vertical vibration caused by the pressure device will accelerate the cycle of parts replacement and bring huge economic losses. Therefore, it is necessary to suppress the vertical vibration of the rolling mill pressure device.

[0003] Currently, Chinese patent publication CN 109114149 B discloses a graded damping vibration reduction device for a rolling mill. The device comprises a vibration sensor, a damping cylinder, and multiple solenoid valves. The damping cylinder includes an upper damping oil chamber and a lower damping oil chamber. Each solenoid valve controls a fluid channel. The upper and lower damping oil chambers are connected by a fluid channel and a return channel. The fluid channel is equipped with a floating sealing valve, and the return channel is provided at the upper end with a return channel controlled by a one-way control valve. The vibration sensor detects the frequency of the dynamic vibration signal, and the solenoid valve controls the opening of the corresponding fluid channel based on the frequency of the dynamic signal. In this invention, the different fluid flow diameters corresponding to the different solenoid valves result in different damping forces generated by the damping fluid flow, enabling graded vibration reduction for different frequencies of vibration in the rolling mill. However, during mill operation, vertical vibration caused by the hydraulic press-down mechanism of the rolling mill not only affects the life of components such as the support rolls and work rolls, but also significantly affects the quality of the strip. The significant vertical vibration also poses a significant safety hazard to the entire rolling mill. Summary of the Invention

[0004] In order to solve the above technical problems, the present invention provides a hydraulic hold-down device vibration reduction system based on electromagnetic induction, which can extend the life of parts such as support rolls and working rolls, improve the quality of plates and strips, and thereby improve the overall safety of the rolling mill.

[0005] The above technical objectives of the present invention are achieved through the following technical solutions:

[0006] A vibration reduction system for a hydraulic press-down device based on electromagnetic induction includes a main vibration reduction component and a cylindrical bracket. The main vibration reduction component is evenly distributed along the circumference of the inner part of the cylindrical bracket; the main vibration reduction component includes an arc-shaped push rod, a first spring, a piston rod, and a vibration reduction block. One end of the arc-shaped push rod is connected to the piston rod, the vibration reduction block is installed at the other end of the arc-shaped push rod, and the first spring is installed on the piston rod.

[0007] It is further provided that eight main body vibration reduction assemblies are evenly distributed along the inner circumference of the cylindrical bracket.

[0008] It is further provided that the cylindrical bracket is located at the outermost periphery of the vibration reduction system and is cylindrical in shape, and is used to protect the vibration reduction system.

[0009] It is further configured that the main vibration reduction assembly also includes a square plate and a spring pad. The spring pad is installed between the first spring and the piston rod. The square plate surrounds the arc-shaped push rod, and a reinforcing rib is fixed under the square plate.

[0010] It is further arranged that the arc push rod is located inside the cylindrical bracket, the arc push rod is semicircular, a circular hole is opened at one end, and the piston rod and the circular hole are gap-matched; the vibration damping block is a vibration-absorbing material with high elasticity and large friction force, the upper and lower parts of the arc push rod are made of thicker materials and high strength, the middle part is relatively thin, and has a certain ability of elastic deformation, a support beam is provided in the middle of the arc push rod, the support beam and the support rod are transitionally matched, the support rod is long and narrow, one end of the support rod is threadedly connected to the bottom plate, the other end of the support rod is semicircular, and a circular hole is opened at the center of the circle, and the support beam and the circular hole are transitionally matched; a circular hole is opened at one end of the square plate facing the inner wall of the cylindrical bracket, and the lower surfaces of the two right-angled ends at the same end are welded to the inner wall of the cylindrical bracket with reinforcing ribs to fix the position of the square plate and the arc push rod. It is further arranged that in the initial state, a first spring is provided at one end of the arc-shaped push rod toward the inner wall of the cylindrical bracket, applying a force in the horizontal direction. The support rod is connected to the arc-shaped push rod, and a vibration damping block is provided at the other end of the arc-shaped push rod. Due to the effect of the lever principle, the vibration damping block rests against the upper surface of the sensor boss, and the arc-shaped push rod as a whole is in a stationary state.

[0011] The electromagnetic induction-based hydraulic press-down device vibration reduction system further comprises a press-down vibration sensor, a support rod, a sensor boss, a base plate, and a control assembly. The press-down vibration sensor is mounted in the center of the base plate, directly above the electric pulse control center. The press-down vibration sensor is embedded in the inner cavity of the sensor boss, and the middle portion of the arc-shaped push rod is connected to the support rod. Furthermore, the base plate is located at the bottom end of the vibration reduction system, screwed to the cylindrical bracket, and has a circular pancake shape. The press-down vibration sensor is screwed to the electric pulse control center, and the sensor boss is threaded to the base plate, forming a two-layer square structure.

[0012] It is further configured that the downward pressure vibration sensor includes an end cover, a bearing seat, a magnet, a shell, a vibration contact, a sleeve, a bearing, a coil, a second spring, a spring base, and an annular retaining ring. The vibration contact is gap-fitted with the end cover, the coil is wrapped around the side of the vibration contact, the annular retaining ring is arranged on the periphery of the coil, the spring base is installed at the center of the upper surface of the bottom end of the shell, the second spring is installed on the spring base, the magnet is installed on the inner wall of the side of the shell, the bearing seat is installed on the inner side of the end cover, the bearing is installed on the bearing seat, and the sleeve is sleeved outside the bearing.

[0013] It is further provided that two magnetic poles with opposite magnetic properties are fixed on both sides of the magnet, and the bottom ends of the magnets are connected to each other.

[0014] It is further provided that the arc-shaped push rod includes a hydraulic rod hole and a support beam. The support beam is arranged in the middle part of the arc-shaped push rod and is connected to the support rod. A limiting groove is provided on the support beam.

[0015] The control assembly further comprises a hydraulic cylinder, an electro-hydraulic servo valve, a hydraulic pump, an oil circuit, an oil tank, and an electric pulse control center. The oil circuit comprises a first oil circuit and a second oil circuit. The oil tank is positioned at the bottom end of the cylindrical support cavity. An oil tank is positioned below each of the arc-shaped push rods. The hydraulic pump is positioned directly above the oil tank. The electro-hydraulic servo valve is connected to the hydraulic pump via the first oil circuit. The hydraulic cylinder is connected to the electro-hydraulic servo valve via the second oil circuit. Wires connect the electric pulse control center and the electro-hydraulic servo valve. Furthermore, the cylindrical support cavity is provided with an oil circuit. The hydraulic pump is positioned directly above the oil tank, providing upward oil pressure through the oil circuit. Furthermore, the oil tank is positioned at the bottom end of the cylindrical support cavity. The hydraulic pump draws oil from the oil tank through the oil circuit. The oil passes through the electro-hydraulic servo valve and then flows upward into the hydraulic cylinder cavity. The oil then flows through another cavity of the hydraulic cylinder, through the oil circuit to the electro-hydraulic servo valve, and finally returns to the oil tank.

[0016] Furthermore, the electric pulse control center includes a potentiometer, a stepper motor, wires, and a signal amplifier, and the potentiometer, stepper motor, and signal amplifier are connected by wires. Furthermore, the electric pulse control center has two holes at its top end, through which wires from the downward pressure vibration sensor pass to transmit pulse signals to the electric pulse control center. The electric pulse control center is connected to the electro-hydraulic servo valve by wires and transmits pulse signals to the electro-hydraulic servo valve based on the received pulse signals.

[0017] It is further provided that the vibration-damping block is made of a vibration-absorbing material with high elasticity and large friction.

[0018] In summary, the present invention has the following beneficial effects:

[0019] 1. The present invention utilizes electromagnetic induction technology, hydraulic transmission and control technology to convert vibration kinetic energy into frictional heat energy of the vibration damping block, elastic potential energy of the vibration damping block, and elastic potential energy of the middle part of the arc-shaped push rod. The vibration damping amplitude is adjusted according to the actual vibration situation, thereby minimizing the loss of the equipment itself, extending the life of parts such as support rolls and work rolls, improving plate and strip quality, and thereby enhancing the overall safety of the rolling mill.

[0020] 2. The present invention accurately regulates the thrust of the arc-shaped push rod to the plunger according to the different vertical vibration frequencies of the pressing device, thereby achieving different degrees of adaptive vibration suppression.

[0021] 3. The present invention suppresses the vibrations of the press-down device in both the vertical and horizontal directions by sending vibration signals in the vertical direction through electromagnetic induction technology and control components. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 Schematic diagram of the installation position of the vibration reduction system of the hydraulic screw-down device based on electromagnetic induction in the preferred embodiment;

[0023] Figure 2 3. It is a schematic diagram of the three-dimensional structure of the vibration reduction system of the hydraulic screw-down device based on electromagnetic induction in a preferred embodiment;

[0024] Figure 3 This is a schematic cross-sectional view of a vibration reduction system of a hydraulic screw-down device based on electromagnetic induction according to a preferred embodiment;

[0025] Figure 4 yes Figure 3 Enlarged view of point A in the middle;

[0026] Figure 5 It is a cross-sectional structural diagram of a downward pressure vibration sensor;

[0027] Figure 6 It is a schematic diagram of the three-dimensional structure of the arc push rod;

[0028] Figure 7 yes Figure 6 Enlarged view of point B in the middle;

[0029] Figure 8 is a schematic diagram of the control assembly of the preferred embodiment.

[0030] Reference numerals: 1, arc-shaped push rod; 101, hydraulic rod hole; 102, support beam;

[0031] 2. Square plate; 3. Spring pad; 4. First spring; 5. Piston rod; 6. Vibration damping block;

[0032] 7. Downward pressure vibration sensor; 701. End cover; 702. Bearing seat; 703. Magnet; 704. Housing; 705. Vibrating contact; 706. Bushing; 707. Bearing; 708. Coil; 709. Second spring; 710. Spring base; 711. Annular retaining ring;

[0033] 8. Support rod; 9. Sensor boss; 10. Cylindrical bracket; 11. Base plate; 12. Hydraulic cylinder; 13. Electro-hydraulic servo valve; 14. Hydraulic pump; 15. Oil circuit; 1501, first oil circuit; 1502, second oil circuit;

[0034] 16. Fuel tank; 17. Electric pulse control center; 1701. Potentiometer; 1702. Stepper motor; 1703. Wire; 1704. Signal amplifier;

[0035] 18. Reinforcement rib; 19. Hydraulic press-down device; 1901. Plunger. DETAILED DESCRIPTION

[0036] The preferred embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0037] like Figure 1 As shown, the preferred embodiment of the electromagnetic induction-based hydraulic holddown vibration reduction system is coaxially arranged with the hydraulic holddown device 19. The preferred embodiment of the electromagnetic induction-based hydraulic holddown vibration reduction system includes a main vibration reduction assembly and a cylindrical bracket 10. The main vibration reduction assembly has eight components evenly distributed along the circumference of the cylindrical bracket 10. The hydraulic holddown device 19 is equipped with a cylindrical plunger 1901. The cylindrical bracket 10 is located at the outermost periphery of the preferred embodiment of the electromagnetic induction-based hydraulic holddown vibration reduction system and is used to protect the vibration reduction system.

[0038] like Figure 2 、 Figure 3 As shown, the main vibration reduction assembly includes an arc-shaped push rod 1, a square plate 2, a spring pad 3, a first spring 4, a piston rod 5, and a vibration reduction block 6. One end of the arc-shaped push rod 1 is connected to the piston rod 5, and the vibration reduction block 6 is installed on the other end of the arc-shaped push rod 1. The first spring 4 and the spring pad 3 are installed on the piston rod 5. The square plate 2 surrounds the arc-shaped push rod 1 to protect the arc-shaped push rod head. Figure 4As shown, a reinforcing rib 18 is fixed below the square plate 2 to ensure the overall stability of the system during operation. The arc push rod 1 is located inside the cylindrical bracket 10. The arc push rod 1 is semicircular and has a circular hole at one end. The piston rod 5 is in a gap with the circular hole. The vibration damping block 6 is made of a vibration-absorbing material with high elasticity and high friction. The upper and lower parts of the arc push rod 1 are made of thicker materials with high strength, while the middle part is relatively thin and has a certain elastic deformation ability. A support beam 102 is provided in the middle of the arc push rod 1. The support beam 102 is in a transitional fit with the support rod 8. The support rod 8 is long and has one end threaded with the bottom plate 11. The other end of the support rod 8 is semicircular and has a circular hole at the center. The support beam 102 is in a transitional fit with the circular hole. The square plate 2 has a circular hole at one end facing the inner wall of the cylindrical bracket 10, and the lower surface of the two right-angled ends at the same end is welded to the inner wall of the cylindrical bracket 10 with reinforcing ribs 18 to fix the position of the square plate 2 and the arc push rod 1. In the initial state, one end of the arc-shaped push rod 1 has a first spring 4 on the inner wall side of the cylindrical bracket 10, applying a force in the horizontal direction. The support rod 8 is connected to the arc-shaped push rod 1, and the other end of the arc-shaped push rod 1 is provided with a vibration damping block 6. Due to the effect of the lever principle, the vibration damping block 6 rests against the upper surface of the sensor boss 9, and the arc-shaped push rod 1 as a whole is in a stationary state.

[0039] The preferred embodiment of the electromagnetic induction-based hydraulic press-down device vibration reduction system also includes a press-down vibration sensor 7, a support rod 8, a sensor boss 9, a base plate 11, and a control assembly. The press-down vibration sensor 7 is mounted in the exact center of the base plate 11, directly above the electric pulse control center 17. The press-down vibration sensor 7 is embedded in the inner cavity of the sensor boss 9, and the middle portion of the arc-shaped push rod 1 is connected to the support rod 8. The base plate 11 is located at the bottom end of the electromagnetic induction-based hydraulic press-down device vibration reduction system of the preferred embodiment. The base plate 11 is screwed to the cylindrical bracket 10. The base plate 11 is in the shape of a circular pancake. The press-down vibration sensor 7 is screwed to the electric pulse control center 17, and the sensor boss 9 is threaded to the base plate 11, forming a two-layer square structure.

[0040] like Figure 5As shown, the downward pressure vibration sensor 7 includes an end cap 701, a bearing seat 702, a magnet 703, a housing 704, a vibration contact 705, a sleeve 706, a bearing 707, a coil 708, a second spring 709, a spring base 710, and an annular retaining ring 711. The vibration contact 705 is loosely fitted with the end cap 701, the coil 708 is wrapped around the side of the vibration contact 705, the annular retaining ring 711 is arranged on the periphery of the coil 708, the spring base 710 is mounted on the center of the upper surface of the bottom end of the housing 704, the second spring 709 is mounted on the spring base 710, the magnet 703 is mounted on the inner wall of the side of the housing 704, the bearing seat 702 is mounted on the inner side of the end cap 701, the bearing 707 is mounted on the bearing seat 702, and the sleeve 706 is sleeved on the outside of the bearing 707. Two magnetic poles with opposite magnetic properties are fixed on both sides of the magnet 703, and the bottom ends of the magnets 703 are connected to each other. The vibrating contact 705 and the end cap 701 are clearance-fitted to ensure that no significant friction is generated between the vibrating contact and the end cap 701 during the up-and-down vibration process. The vibrating contact 705 is made of lightweight material, with a coil 708 tightly wrapped around the side. An annular retaining ring 711 is also provided on the side of the vibrating contact 705. The vibrating contact 705 reacts strongly to vertical vibration signals. When the plunger 1901 of the hydraulic press-down device 19 is pressed down and contacts the vibrating contact 705, the vibrating contact 705 clings to the lower surface of the plunger 1901. The vertical vibration of the hydraulic press-down device 19 drives the vibrating contact 705 to vibrate vertically at the same frequency. Annular retaining ring 711 primarily prevents coil 708 from moving up and down and maintains the initial position of vibrating contact 705. Before vibrating contact 705 contacts the lower surface of plunger 1901, second spring 709 presses against vibrating contact 705, while annular retaining ring 711 presses against the upper surface of end cap 701, ensuring force equilibrium on vibrating contact 705. Spring base 710, located at the center of the upper surface of the bottom end of housing 704, primarily secures second spring 709.

[0041] The working principle of the downward pressure vibration sensor 7 is: when the vibration contact 705 vibrates in the vertical direction, it drives the coil 708 to vibrate. Since the magnet 703 makes the downward pressure vibration sensor 7 full of magnetic field, the coil 708 cuts the magnetic flux lines in the magnetic field, generates induced current, and transmits the pulse current to the electric pulse control center 17 below through the wire. Therefore, the downward pressure vibration sensor 7 converts the vertical vibration signal into a pulse current signal.

[0042] like Figure 6 、 Figure 7 As shown, the arc push rod 1 includes a hydraulic rod hole 101 and a support beam 102. The support beam 102 is arranged in the middle part of the arc push rod and is connected to the support rod 8. A limiting groove is provided on the support beam 102 to limit the horizontal and vertical degrees of freedom of the arc push rod, so that the arc push rod has only one degree of freedom of rotation around the support beam.

[0043] like Figure 8 The control assembly includes a hydraulic cylinder 12, an electro-hydraulic servo valve 13, a hydraulic pump 14, an oil circuit 15, an oil tank 16, and an electric pulse control center 17. The oil circuit 15 includes a first oil circuit 1501 and a second oil circuit 1502. The oil tank 16 is placed at the bottom of the inner cavity of the cylindrical bracket 10. An oil tank 16 is provided below each arc-shaped push rod 1. The hydraulic pump 14 is provided directly above the oil tank 16. The electro-hydraulic servo valve 13 is connected to the hydraulic pump 14 via the first oil circuit 1501. The hydraulic cylinder 12 is connected to the electro-hydraulic servo valve 13 via the second oil circuit 1502. The electric pulse control center 17 is connected to the electro-hydraulic servo valve 13 by wires. The inner cavity of the cylindrical bracket 10 is provided with an oil circuit 15. The hydraulic pump 14 is located directly above the oil tank 16 and provides oil pressure upward through the oil circuit 15. An oil tank 16 is located at the bottom of the inner cavity of the cylindrical support 10. The hydraulic pump 14 draws oil from the oil tank 16 through the oil line 15. The oil then flows upward through the electro-hydraulic servo valve 13 into the cavity of the hydraulic cylinder 12. The oil then passes through another cavity of the hydraulic cylinder 12, through the oil line 15 to the electro-hydraulic servo valve 13, and finally returns to the oil tank 16. The electric pulse control center 17 includes a potentiometer 1701, a stepper motor 1702, a wire 1703, and a signal amplifier 1704. The potentiometer 1701, stepper motor 1702, and signal amplifier 1704 are connected by wires. The electric pulse control center 17 has two holes at its top. The wire 1703 of the downward pressure vibration sensor 7 passes through these two holes and transmits a pulse signal to the electric pulse control center 17. The electric pulse control center 17 is connected to the electro-hydraulic servo valve 13 by a wire and transmits a pulse signal to the electro-hydraulic servo valve 13 based on the received pulse signal.

[0044] The working principle of the control component is as follows: when the vibration reduction system of the hydraulic pressing device based on electromagnetic induction in the preferred embodiment receives a current pulse signal from the pressing vibration sensor 7, the stepper motor 1702 drives the moving contact of the potentiometer 1701 to rotate a certain angle, so that the moving contact is offset from the middle position of the potentiometer, generating a weak voltage signal. The signal is amplified by the amplifier 1704 and input into the control coil of the electro-hydraulic servo valve 13, causing the electro-hydraulic servo valve 13 to produce a certain opening amount. At this time, the hydraulic pump 14 draws out the pressure oil in the oil tank 16 and enters the hydraulic cylinder 12 through the second oil circuit 1502 and the electro-hydraulic servo valve 13, driving the piston rod 5 to move.

[0045] During normal operation, in the initial state, the arc-shaped push rod 1 is stationary, and the bottom diameter of the plunger 1901 is slightly smaller than the diameter of the circle formed by the eight vibration-damping blocks 6 of the main vibration-damping assembly. As shown in Figure 2, the circle formed by the eight vibration-damping blocks 6 can be intuitively seen. When the hydraulic hold-down device 19 is in an operating state without vertical vibration, the hydraulic hold-down device 19 is initially in a free hold-down state. When the hydraulic hold-down device 19 is in an operating state without vertical vibration, the hydraulic hold-down device 19 is free to press downward. The hydraulic hold-down device 19 first contacts the vibration contact 705 of the downward vibration sensor, then contacts the sensor boss 9, and applies a downward force to the support rollers on the rolling mill below. At this time, a certain gap remains between the vibration-damping blocks 6 and the side surfaces of the plunger 1901, so the plunger of the hydraulic hold-down device is not subject to downward pressure resistance. When the hydraulic down-pressing device 19 is pressed down and vibrates in the vertical direction, the plunger 1901 contacts the vibration contact 705 and transmits a vibration signal to the vibration contact 705. The down-pressing vibration sensor 7 starts to work, and the vibration damping block 6 presses against the plunger 1901. The vertical vibration of the hydraulic down-pressing device 19 is suppressed by the vertical friction force between the plunger 1901 and the vibration damping block 6, and the horizontal vibration of the plunger 1901 is absorbed by the characteristics of the vibration damping block 6.

[0046] In addition, it should be noted that when the plunger 1901 of the depressing device is fully depressed until it contacts the upper surface of the depressing vibration sensor boss 9, while transmitting the depressing force downward, the vibration contact 705 continues to press against the lower surface of the plunger 1901. At this time, the hydraulic depressing device 19 generates vertical vibrations, the vibration contact 705 receives the vibration signal, the depressing vibration sensor 7 starts to work, the vibration damping block 6 presses against the plunger 1901, and when the vertical vibration of the hydraulic depressing device 19 disappears, the vibration contact 705 loses the vertical vibration signal, the depressing vibration sensor 7 stops working, and the vibration damping block 6 releases the plunger 1901, and this cycle repeats.

[0047] The working process of this preferred embodiment is as follows:

[0048] When the hydraulic pressing device 19 is pressed down, the plunger 1901 has no contact with the vibration damping block 6 and is pressed down without resistance. During the pressing process, the plunger 1901 first contacts the vibration contact 705 of the pressing vibration sensor, and the pressing vibration sensor 7 starts to work. When the hydraulic pressing device 19 vibrates in the vertical direction, the plunger 1901 drives the vibration contact 705 of the pressing vibration sensor 7 to vibrate, and the coil 708 cuts the magnetic flux lines to generate an induced current, which inputs a current pulse to the electric pulse control center 17. The stepper motor 1702 receives the pulse signal, and the stepper motor 1702 drives the potentiometer 1701 to rotate one degree. At a fixed angle, a weak voltage signal is generated. After being amplified by signal amplifier 1704, it is input into the control coil of electro-hydraulic servo valve 13, causing electro-hydraulic servo valve 13 to open a certain amount. Hydraulic pump 14 presses hydraulic oil from tank 16 into hydraulic cylinder 12 through electro-hydraulic servo valve 13. The piston rod in hydraulic cylinder 12 pulls the head of arc-shaped push rod 1. Due to the principle of leverage, arc-shaped push rod 1 presses against plunger 1901. Vertical friction between plunger 1901 and vibration damping block 6 suppresses vertical vibration of the press-down device. The characteristics of vibration damping block 6 absorb horizontal vibration of plunger 1901. When the hydraulic press-down device 19 has no vertical vibration, the press-down device can press down freely without resistance from vibration damping block 6. Plunger 1901 continues to press down, first contacting vibration contact 705. Due to the lack of vertical vibration signal, the press-down vibration sensor 7 stops working until it contacts sensor boss 9 and transmits the downward pressing force.

[0049] The preferred embodiment of the present invention is based on the electromagnetic induction hydraulic pressing device vibration reduction system, which uses electromagnetic induction technology, hydraulic transmission and control technology to convert vibration kinetic energy into frictional heat energy of the vibration reduction block 6, elastic potential energy of the vibration reduction block 6, and elastic potential energy of the middle part of the arc-shaped push rod 1, and adjusts the vibration reduction amplitude according to the actual vibration conditions, thereby suppressing the loss of the equipment itself to the greatest extent and extending its service life. It has simple transmission, compact structure and obvious vibration reduction effect.

[0050] During the vibration reduction process, the vibration kinetic energy of the hydraulic pressing device 19 is converted into the frictional heat energy of the vibration reduction block 6, the elastic potential energy of the vibration reduction block 6, and the elastic potential energy of part of the arc push rod 1. According to the different vertical vibration frequencies of the pressing device, the thrust of the arc push rod 1 to the plunger 1901 is precisely regulated to achieve different degrees of adaptive vibration reduction.

[0051] In a preferred embodiment of the present invention, the electromagnetic induction-based hydraulic screw-down device vibration reduction system ultimately suppresses both vertical and horizontal vibrations of the screw-down device through vertical vibration signals.

[0052] The above-mentioned embodiment is merely an explanation of the present invention and is not a limitation of the present invention. After reading this specification, those skilled in the art may make non-creative modifications to the embodiment as needed, but as long as they are within the scope of the claims of the present invention, they are protected by patent law.

Claims

1. A hydraulic screw-down device vibration reduction system based on electromagnetic induction, characterized in that: The invention comprises a main vibration damping component and a cylindrical bracket (10), wherein the main vibration damping component is evenly distributed along the inner circumference of the cylindrical bracket (10); the main vibration damping component comprises an arc-shaped push rod (1), a first spring (4), a piston rod (5), and a vibration damping block (6); one end of the arc-shaped push rod (1) is connected to the piston rod (5), the vibration damping block (6) is installed at the other end of the arc-shaped push rod (1), and the first spring (4) is installed on the piston rod (5); The electromagnetic induction-based hydraulic press-down device vibration reduction system further comprises a press-down vibration sensor (7), a support rod (8), a sensor boss (9), a base plate (11), and a control component, wherein the press-down vibration sensor (7) is installed at the center of the base plate (11), the press-down vibration sensor (7) is embedded in the inner cavity of the sensor boss (9), and the middle portion of the arc-shaped push rod (1) is connected to the support rod (8); The downward pressure vibration sensor (7) includes an end cover (701), a bearing seat (702), a magnet (703), a housing (704), a vibration contact (705), a sleeve (706), a bearing (707), a coil (708), a spring (709), a spring base (710), and an annular retaining ring (711). The vibration contact (705) is gap-connected with the end cover (701), the coil (708) is wrapped around the side of the vibration contact (705), the annular retaining ring (711) is arranged on the periphery of the coil (708), the spring base (710) is installed at the center of the upper surface of the bottom end of the housing (704), the spring (709) is installed on the spring base (710), the magnet (703) is installed on the inner wall of the side of the housing (704), the bearing seat (702) is installed on the inner side of the end cover (701), the bearing (707) is installed on the bearing seat (702), and the sleeve (706) is sleeved outside the bearing (707); The control assembly includes a hydraulic cylinder (12), an electro-hydraulic servo valve (13), a hydraulic pump (14), an oil circuit (15), an oil tank (16), and an electric pulse control center (17). The oil circuit (15) includes a first oil circuit (1501) and a second oil circuit (1502). The oil tank (16) is placed at the bottom end of the inner cavity of the cylindrical bracket (10). An oil tank (16) is provided below each of the arc-shaped push rods (1). The hydraulic pump (14) is provided directly above the oil tank (16). The servo valve (13) is connected to the hydraulic pump (14) via the first oil circuit (1501), the hydraulic cylinder (12) is connected to the electro-hydraulic servo valve (13) via the second oil circuit (1502), and the electric pulse control center (17) and the electro-hydraulic servo valve (13) are connected by wires; the electric pulse control center (17) has two holes at its upper end, and the wires of the downward pressure vibration sensor (7) pass through the two holes to transmit pulse signals to the electric pulse control center (17); the piston rod (5) is located in the hydraulic cylinder (12).

2. The electromagnetic induction-based hydraulic screw-down device vibration reduction system according to claim 1, characterized in that: There are eight main body vibration reduction components evenly distributed along the inner circumference of the cylindrical bracket (10).

3. The electromagnetic induction-based hydraulic screw-down device vibration reduction system according to claim 2, characterized in that: The main vibration reduction assembly further comprises a square plate (2) and a spring pad (3). The spring pad (3) is installed between the first spring (4) and the piston rod (5). The square plate (2) surrounds the arc-shaped push rod (1). A reinforcing rib (18) is fixed below the square plate (2).

4. The electromagnetic induction-based hydraulic screw-down device vibration reduction system according to claim 1, characterized in that: Two magnetic poles with opposite magnetic properties are fixed on both sides of the magnet (703), and the bottom ends of the magnet (703) are connected to each other.

5. The electromagnetic induction-based hydraulic screw-down device vibration reduction system according to claim 1, characterized in that: The arc-shaped push rod (1) comprises a hydraulic rod hole (101) and a support beam (102). The support beam (102) is arranged in the hydraulic rod hole (101), and a limiting groove is provided on the support beam (102).

6. The electromagnetic induction-based hydraulic screw-down device vibration reduction system according to claim 1, characterized in that: The electric pulse control center (17) includes a potentiometer (1701), a stepper motor (1702), a wire (1703), and a signal amplifier (1704). The potentiometer (1701), the stepper motor (1702), and the signal amplifier (1704) are connected via the wire (1703).

7. The electromagnetic induction-based hydraulic screw-down device vibration reduction system according to claim 1, characterized in that: The vibration-damping block (6) is made of a vibration-absorbing material with high elasticity and high friction.

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