A cyclic granular damper and its assembly method

Abstract

The application discloses a circulating granular damping vibration isolator and an assembling method thereof, which is composed of an upper support frame, a lower support frame, a compression spring, a magnetic force pump, a granular tank, a double-threaded rod elevator and a ball screw pair.The upper support frame is connected with a mechanical equipment, and the lower support frame is connected with a foundation; one end of the compression spring is connected with the upper support frame, and the other end is connected with the lower support frame; the ball screw is fixed to the upper support frame and is screw-inserted into a central hole of the magnetic force pump; the magnetic force pump is fixed to the lower support frame through bolts; the granular tank is filled with granules; the double-threaded rod elevator is used for adjusting the volume of the granular tank; and the magnetic force pump and the granular tank are connected through a hose.The application has the advantages of simple structure, easy manufacturing, and the like, compared with a traditional vibration isolator structure, can adjust the volume of the granular tank according to actual application requirements by adjusting the position of the double-threaded rod elevator, and can further enhance the vibration isolation effect by converting vibration energy into heat energy through the collision and friction between the granules.

Description

Technical Field

[0001] This invention relates to the field of vibration reduction and noise reduction technology, and in particular to a cyclic particle damping vibration isolator and its assembly method. Background Technology

[0002] In recent years, the deep-sea development of offshore oil and gas has led to an increasing number of complex loads on ships. As the primary power source for ships, the vibration control of diesel engines has become particularly important. Vibration isolation is a method of vibration control that reduces the impact of equipment vibration on the surrounding environment and its own vibration. Installing vibration isolators is the most common method for reducing vibration. Particle collision damping is a passive vibration reduction technology. This technology involves adding one or more dampers filled with a certain number of particles to the structure being isolated, or machining a certain number of holes in the vibrating structure. Its vibration reduction mechanism achieves vibration reduction through energy dissipation from collisions and friction between particles and between particles and the container wall. This technology has advantages such as high temperature resistance, aging resistance, and wide frequency range. Therefore, this technology is very suitable for vibration isolators, helping to reduce the vibration level of equipment such as diesel engines and improve their performance and reliability. Because particle damping has highly nonlinear characteristics, it is affected by complex factors, such as the particle material properties, shape, diameter, particle filling rate, container shape, and vibration environment, all of which have different impacts on the vibration reduction effect.

[0003] A utility model patent with announcement number "CN218207590U" and titled "A Rotary Particle Damper" discloses a rotary particle damper, including a shell, damping particles, rotating blades, and a rotating shaft. The patent connects the rotating shaft to a structure, and the structure drives the rotating shaft to rotate, which in turn drives the rotating blades on the shaft to rotate and cut the damping particle group. Utilizing the flow characteristics of the damping particle group, it effectively promotes the collision and friction of the damping particles, accelerating the dissipation of vibration energy. (Announcement number: [omitted]) The invention patent "CN106567590B" entitled "A Nonlinear Hybrid Rotary Energy Dissipating Damper" discloses a nonlinear hybrid rotary energy dissipating damper, which includes an exhaust port, a damper shell, a horizontal connecting rod, a sealing ring, a circumferential rotary bearing, a rotating steel plate, a damping liquid, damping particles, a sleeve, a rotating thread, a nonlinear spring damper, and a guide rail. Under the action of the rotating thread, the sleeve rotates around the tube axis, and the rotating steel plate agitates the viscous liquid and damping particles inside the damper to provide damping force.

[0004] The following issues remain unresolved by the above technologies:

[0005] 1. The utility model patent with announcement number "CN218207590U" and title "A Rotary Particle Damper" has a design structure that causes particles to accumulate at the bottom of the structure due to gravity. In actual use, the particles may be unevenly distributed and partially concentrated, causing the center of gravity of the structure to shift, thereby increasing vibration and having the opposite effect. On the other hand, since the blades rotate and come into direct contact with the metal particles, if the blades rotate too slowly, they cannot effectively knock up the particles, causing them to collide and rub against each other, thus consuming system energy and resulting in poor vibration reduction. If the blades rotate too fast, it will increase the collision and wear between the blades and the particles, shortening the service life of the structure. The particles are disordered and irregular during the rotation and collision process.

[0006] 2. The invention patent with announcement number "CN106567590B" and title "A Nonlinear Hybrid Rotational Energy Dissipating Damper" has the following problems: during vibration, the damper shell moves back and forth, causing the rotating steel plate to only swing back and forth, making it difficult to form a cyclic rotation and thus making it difficult to make the liquid rotate significantly. On the other hand, because the damper shell causes the rotating steel plate to keep moving left and right, the rotating steel plate keeps rotating and oscillating, and the sealing relies solely on the sealing ring, which may lead to liquid leakage, thus inevitably increasing maintenance costs. Summary of the Invention

[0007] To address the issues in the existing technologies mentioned above, such as particles accumulating at the bottom of the structure due to gravity, uneven particle distribution leading to partial concentration and shift of the structure's center of gravity, resulting in increased vibration, excessively high blade rotation speed increasing collision wear between blades and particles, shortening the structure's service life, and the disordered and irregular particle movement during rotation and collision.

[0008] This invention proposes a cyclic particle damping vibration isolator. This invention is achieved through the following technical solution:

[0009] This invention includes a support assembly and a particle circulation assembly. The support assembly includes an upper support frame, a compression spring, and a lower support frame. The particle circulation assembly includes a magnetic pump, a ball screw, a particle tank, particles, a first hose, and a second hose. The upper support frame has bolt holes for connecting mechanical equipment. An upper top plate is fixedly connected to the upper support frame by a first bolt. The upper end of the ball screw is fixedly connected to the upper top plate, and the lower end is rotatably connected to the magnetic pump. The lower support frame has anchor bolt holes for fixing to the foundation. The magnetic pump support plate is fixedly connected to the lower support frame by a second bolt, and the particle tank support plate is fixedly connected to the lower support frame by a third bolt. One end of the compression spring is welded and fixed to the upper support frame, and the other end is welded and fixed to the lower support frame. The middle part of the magnetic pump is rotatably connected to the ball screw, and the bottom is fixedly connected to the magnetic pump support plate. The magnetic pump also includes a one-way bearing, a screw inner sleeve, a magnet bracket, a powerful magnet, a bearing limit ring, a fourth bolt, a fixed support, and a soft... The system includes a pipe support, a first bearing, a limit nut, a fifth bolt, and a sixth bolt. The ball screw is helically inserted into the inner sleeve of the screw. The outer ring of the bottom surface of the one-way bearing abuts against the upper end face of the stepped circle of the inner sleeve of the screw. The outer ring of the one-way bearing abuts against the inner ring of the magnet support. A strong magnet is fixed to the outer end of the magnet support. The outer ring of the top surface of the first bearing abuts against the bearing limit ring. The bearing limit ring is fixedly installed on the top of the fixed support. The inner ring of the top surface of the first bearing abuts against the side of the stepped circle of the inner sleeve of the screw. The outer ring of the bottom surface of the first bearing abuts against the stepped surface of the mounting hole of the fixed support. The inner ring of the bottom surface of the first bearing abuts against the limit nut. The hose support is fixedly connected to the fixed support by the fifth bolt. The fixed support and the magnetic pump support plate are fixed by the sixth bolt. One end of the first hose is connected to the outlet of the magnetic pump, and the other end is connected to the top inlet of the granulator. One end of the second hose is connected to the inlet of the magnetic pump, and the other end is connected to the bottom outlet of the granulator. The granulator is fixedly connected to the granulator support plate by the tenth bolt.

[0010] Furthermore, a single-section universal joint is provided between the ball screw and the upper top plate. The upper end of the single-section universal joint is welded to the upper top plate, and the lower end is welded to the upper end of the ball screw.

[0011] Furthermore, the compression spring has a wire diameter of 10-50mm and a pitch of 10-50mm.

[0012] Furthermore, the number of the particle circulation components is two, which are symmetrically arranged with respect to the center line of the upper support frame in the length direction.

[0013] Furthermore, the hose support is made of acrylic.

[0014] Furthermore, the pellet container is a square, open-center type, and the pellet container is closed by an eleventh bolt.

[0015] Furthermore, the particles are spherical particles with a filling rate of 20%-90%, and a diameter of 0.1mm-10mm, and are made of steel particles.

[0016] Furthermore, downward-sloping side plates are welded inside the pellet tank.

[0017] Furthermore, inside the pellet tank, between the pellet tank tray and the pellet tank, a double screw jack is also installed. The double screw jack includes a guide sleeve, an upper cover, a second bearing, a housing, a turbine, a seventh bolt, a protective cylinder, a worm gear, a pellet tray, a threaded screw, an eighth bolt, a handwheel, a snap ring, and a third bearing. The pellet tray is welded to the top of the threaded screw. A second flexible hose passes through the pellet tray and extends into the bottom outlet of the pellet tank. The guide sleeve and turbine are fitted into the threaded screw. The worm gear cooperates with the turbine. The end of the worm gear is connected to the handwheel and fixed to the housing through the cooperation of the third bearing and the snap ring. The inner ring of the second bearing abuts against the stepped circular surface of the housing. The inner ring of the upper cover abuts against the guide sleeve. The stepped surface of the inner ring of the housing abuts against the stepped surface of the outer ring of the upper cover. The protective cylinder is fixedly connected to the housing by the seventh bolt and fixed to the pellet tank tray by the eighth bolt. The threaded screw is painted with different colored stripes. A square observation window is opened at the corresponding position on the side wall of the pellet tank.

[0018] The present invention also provides an assembly method applicable to the cyclic particle damping vibration isolator as described in claim 9, comprising the following steps in sequence:

[0019] (1) First, determine and fix the lower support frame to the on-site installation position. On this basis, fix the pellet tank pallet to the lower support frame with the third bolt.

[0020] (2) To install the double screw jack, first insert the inner ring of the upper guide sleeve into the screw thread, then abut the inner ring of the second bearing against the outer ring of the turbine, and then insert them together into the screw thread. Insert the inner ring of the lower guide sleeve into the screw thread, and then put the assembled parts of the second bearing and turbine into the housing. Abut the outer ring of the third bearing against the worm from both ends and insert it horizontally into the housing. Fix the worm with a snap ring, install the handwheel on the worm, insert the upper end cover from the upper end of the screw thread, abut the inner ring of the upper end cover against the upper guide sleeve, the outer ring of the upper second bearing against the stepped circular surface of the upper end cover, and the outer ring of the lower second bearing against the stepped circular surface of the housing. Weld the pellet tray to the upper end of the screw thread, and fix the protective cylinder to the housing with the seventh bolt. Then fix the protective cylinder to the pellet tank tray with the eighth bolt. The installation of the double screw jack is now complete.

[0021] (3) Connect the first hose to the top inlet of the pellet tank, connect one end of the second hose to the pellet tray at the bottom of the pellet tank, and pass the other end of the second hose through the hole left on the pellet tank. When running, the pellet tank will close the pellet tank with the eleventh bolt, and then fix it to the pellet tank tray with the tenth bolt. The pellet tank installation is complete.

[0022] (4) Fix the magnetic pump support plate to the lower support frame with the second bolt, fix the fixed support to the magnetic pump support plate with the sixth bolt, fix the hose bracket to the fixed support with the fifth bolt, insert the first bearing from below the inner sleeve of the screw, tighten the limit nut to fix the position of the first bearing, insert the first bearing together with the inner sleeve of the screw into the fixed support, so that the outer ring of the first bearing abuts against the upper end face of the stepped circle of the fixed support, put the bearing limit ring from above the inner sleeve of the screw, and fix the fixed support and the bearing limit ring with the fourth bolt, abut the outer ring of the bottom surface of the one-way bearing against the upper end face of the stepped circle of the inner sleeve of the screw, abut the outer ring of the one-way bearing against the inner ring of the magnet bracket, fix a strong magnet at the outer end of the magnet bracket, and install the magnetic pump assembly symmetrically.

[0023] (5) The ball screw is inserted into the assembled magnetic pump assembly through the ball screw helix. The upper end of the ball screw is welded to the single-section universal joint, and the upper end of the single-section universal joint is welded to the upper top plate. The other end of the second hose is connected to the inlet of the magnetic pump. The first hose is used to connect the top of the granule tank and the outlet of the magnetic pump. One end of the compression spring is welded to the lower support frame, and the other end is welded and fixed to the upper support frame. The upper top plate and the upper support frame are fixedly connected by the first bolt. The installation is completed.

[0024] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0025] 1. This invention employs a magnetic pump mechanism. The powerful magnets of the magnetic pump attract particles to the pump, and its magnetic drive principle drives the particles in a cyclical motion, ensuring that each particle enters the particle container in an orderly fashion. This overcomes the problem of particles entering the particle damper haphazardly in traditional methods. The magnetic pump's adsorption and rotation effectively solves the problem of particles entering the container in groups, thus increasing energy consumption due to damping. Its magnetic drive principle also reduces energy consumption. Furthermore, because the magnetic pump operates smoothly with almost no vibration and requires no mechanical seals or lubricating oil, leakage and wear problems are avoided. Regular maintenance is typically unnecessary, contributing to lower operating costs.

[0026] 2. In this design, a flexible hose connects the magnetic pump and the pellet tank. When the magnetic pump attracts pellets and drives them into the pellet tank, the potential energy of the pellets is converted into kinetic energy as they fall from the top of the tank. However, due to air resistance and friction, some of the kinetic energy is converted into heat energy, resulting in a reduction in the total energy of the system and thus improving the vibration isolation effect of the isolator. A flexible hose connects the magnetic pump and the pellet tray. Due to gravity, the pellets fall from the top of the pellet tank and gather at the bottom. Due to the attraction of the magnetic pump, the pellets are attracted back to the magnetic pump through the hose and rotate. This process realizes the orderly circulation of the pellets and the efficient transfer of energy between the pellets. At the same time, the cyclical movement between the pellets makes the system more stable during energy transfer and dissipation, reducing the system's volatility.

[0027] 3. The pellet tank designed in this invention is a center-opening type, which is convenient for installation and also facilitates the maintenance and replacement of the pellet tank in the future. At the same time, the inner side wall of the pellet tank is designed with side plates. When the pellets enter the pellet tank through the hose, it can increase the effective number of collisions between the pellets and the pellet tank, and at the same time prevent the pellets from accumulating in the pellet tank, which further increases the process of pellet damping energy dissipation.

[0028] 4. This invention utilizes a double-screw jack structure. Compared to other jack designs, the double-screw jack is more efficient. The use of two parallel screws ensures high stability during the adjustment of the particle tank cavity height. Different cavity heights result in varying gravitational potential energy for the particles, increasing the conversion of potential energy into kinetic energy and improving energy dissipation. Furthermore, considering the excitation of the vibration isolator, to ensure sufficient collision and friction of the particles within the damper, the size of the damper cavity must be appropriately adjusted so that the particles can overcome resistance and reach the damper wall for collision and friction, dissipating more energy. To meet the increased demand for granules, the height of the granule tray can be adjusted appropriately during initial granule injection to increase the volume and hold more granules, thus saving manufacturing costs. During vertical movement, the granule container is less prone to shaking or tilting, ensuring safety and reliability. The twin-screw jack provides high-precision vertical positioning, allowing for precise lifting or lowering of objects to the required position when needed, enabling accurate adjustment of the granule container cavity size. Furthermore, the twin-screw jack can be customized to meet specific application requirements, including parameters such as height, load capacity, and speed, increasing its flexibility and applicability.

[0029] 5. In this structure, the magnetic pump and the double lead screw mechanism can be arranged relatively compactly in the mechanical system, occupying a relatively small space. This is especially important for some space-limited equipment or machines, as it can effectively save space and improve the overall layout efficiency of the mechanical system. The structure of this invention is simple and easy to process. The materials used are all common materials on the market and are inexpensive, resulting in low cost.

[0030] The advantages and features of the present invention will be illustrated and explained by the following non-limiting description of preferred embodiments, which are given by way of example only with reference to the accompanying drawings. Attached Figure Description

[0031] Figure 1 This is a two-dimensional cross-sectional view of the present invention;

[0032] Figure 2 for Figure 1 Enlarged view of the magnetic pump in the image;

[0033] Figure 3 for Figure 2 Top view of a magnetic pump;

[0034] Figure 4 for Figure 3 A diagram showing the position of the ball bearings at the next moment;

[0035] Figure 5 for Figure 1 Enlarged view of a double-screw jack;

[0036] Figure 6 for Figure 1 A-direction view of the double screw jack;

[0037] Figure 7 for Figure 5 Outline diagram of the threaded lead screw and particle tray;

[0038] Figure 8 for Figure 1 View of the medium-sized particle tank from direction C;

[0039] Figure 9 for Figure 1 View of the medium-sized particle tank from direction B;

[0040] The image indicates:

[0041] 1. Upper support frame; 2. Compression spring; 3. Lower support frame; 4. Top plate; 5. Single-section universal joint; 6. Ball screw; 7. First bolt; 8. Ball; 9. Magnetic pump; 10. Magnetic pump support plate; 11. Second bolt; 12. Double screw jack; 13. Granule tank support plate; 14. Third bolt; 15. Granule tank; 16. Granule; 17. First hose; 18. Second hose; 91. One-way bearing; 92. Screw inner sleeve; 93. Magnet bracket; 94. Strong magnet; 95. Bearing limit ring; 96. Fourth bolt; 97. Fixed support 98. Seat; 99. Hose bracket; 910. First bearing; 911. Limit nut; 912. Fifth bolt; 913. Sixth bolt; 124. Guide sleeve; 125. Top cover; 126. Second bearing; 127. Housing; 128. Turbine; 129. Seventh bolt; 120. Protective sleeve; 121. Worm gear; 1211. Particle tray; 1212. Threaded screw; 1213. Eighth bolt; 1214. Handwheel; 1215. Snap ring; 1216. Third bearing; 151. Side plate; 152. Tenth bolt; 153. Eleventh bolt. Detailed Implementation

[0042] The present application will be further described below with reference to the accompanying drawings and embodiments.

[0043] Example 1:

[0044] like Figure 1 As shown, a circulating particle damping vibration isolator structure includes a support assembly and a particle circulation assembly. The support assembly includes an upper support frame 1, a compression spring 2, and a lower support frame 3. The particle circulation assembly includes a magnetic pump 9, a ball screw 6, a particle tank 15, particles 16, a first hose 17, and a second hose 18. Specifically, it includes an upper support frame 1, a compression spring 2, a lower support frame 3, an upper top plate 4, a single-section universal joint 5, a ball screw 6, a first bolt 7, a ball 8, a magnetic pump 9, a magnetic pump support plate 10, a second bolt 11, a double screw jack 12, a particle tank support plate 13, a third bolt 14, a particle tank 15, particles 16, a first hose 17, and a second hose 18. The magnetic pump 9 includes a one-way bearing 91, a lead screw inner sleeve 92, a magnet bracket 93, a powerful magnet 94, a bearing limit ring 95, a fourth bolt 96, a fixed support 97, a hose bracket 98, a first bearing 99, a limit nut 910, a fifth bolt 911, and a sixth bolt 912, as shown. Figure 2 , Figure 3 , Figure 4 As shown; the double screw jack 12 includes a guide sleeve 121, an upper end cover 122, a second bearing 123, a housing 124, a turbine 125, a seventh bolt 126, a protective cylinder 127, a worm gear 128, a particle tray 129, a threaded screw 1210, an eighth bolt 1211, a handwheel 1212, a retaining ring 1213, and a third bearing 1214, as shown. Figure 5 , Figure 6 As shown; the pellet tank 15 is provided with a side plate 151, a tenth bolt 152 and an eleventh bolt 153 inside.

[0045] The upper support frame 1 is a 300mm*200mm*10mm steel plate. It is provided with bolt holes for connecting mechanical equipment and is fixedly connected to the upper top plate 4 by the first bolt 7. The upper end of the single-section universal shaft 5 is welded to the upper top plate 4, and the lower end is welded to the upper end of the ball screw 6.

[0046] The lower support frame 3 is a 300mm*200mm*10mm steel plate. It is fixed to the foundation with anchor bolt holes, fixedly connected to the magnetic pump support plate 10 by the second bolt 11, and fixedly connected to the pellet tank support plate 13 by the third bolt 14.

[0047] One end of the compression spring 2 is welded and fixed to the upper support frame 1, and the other end is welded and fixed to the lower support frame 3. When the vibration isolator is compressed, the vibration isolation effect is achieved through the compression deformation of the compression spring 2. The wire diameter of the compression spring 2 is 10-50mm, and the pitch is 10-50mm.

[0048] Preferably, the number of the particle circulation components is two sets, which are symmetrically arranged with respect to the center line of the upper support frame 1 in the length direction.

[0049] The magnetic pump 9 is connected to the ball screw 6 in the middle and fixedly connected to the magnetic pump support plate 10 at the bottom. The ball screw 6 is helically inserted into the inner sleeve 92. The outer ring of the bottom surface of the one-way bearing 91 abuts against the upper end face of the stepped circle of the inner sleeve 92. The outer ring of the one-way bearing 91 abuts against the inner ring of the magnet bracket 93. A strong magnet 94 is fixed to the outer end of the magnet bracket 93. The outer ring of the top surface of the first bearing 99 abuts against the bearing limiting ring 95. The bearing limiting ring 95 is fixedly installed on the top of the fixed support 97. The inner ring of the top surface of the first bearing 99 abuts against the side of the stepped circle of the inner sleeve 92. The outer ring of the bottom surface of the first bearing 99 abuts against the stepped surface of the mounting hole of the fixed support 97. The inner ring of the bottom surface of the first bearing 99 abuts against the limiting nut 910. The hose bracket 98 is fixedly connected to the fixed support 97 by the fifth bolt 911. The fixed support 97 and the magnetic pump support plate 10 are fixed by the sixth bolt 912 to form the magnetic pump 9 assembly. The material of the hose bracket 98 is one of acrylic, polyurethane, polystyrene, PC, and phenolic resin. One end of the first hose 17 is connected to the outlet of the magnetic pump 9, and the other end is connected to the top inlet of the pellet tank 15. One end of the second hose 18 is connected to the inlet of the magnetic pump 9, and the other end is connected to the bottom outlet of the pellet tank 15 (i.e., at the pellet tray 129). The inside of the first hose 17 and the second hose 18 is made as smooth as possible.

[0050] The pellet container 15 is as follows Figure 8 , Figure 9The sample container 15 is a square, open-center type. The interior of the sample container 15 has a downwardly sloping side plate 151 welded on. This helps to increase the effective number of collisions when the sample 16 falls into the sample container 15, preventing the sample 16 from accumulating in the sample container 15 and dissipating more system energy. During operation, the sample container 15 is closed by the eleventh bolt 153 and then fixed to the sample container support plate 13 by the tenth bolt 152. The sample 16 is a round sample with a filling rate of 20%-90% and a diameter of 0.1mm-10mm. The material is a material containing iron, cobalt, and nickel, such as steel particles.

[0051] The twin-screw jack 12, as described Figure 5 As shown, manually rotating the worm gear 128 drives the turbine 125 to rotate, which in turn drives the threaded screw 1210 to move up and down, ultimately driving the pellet tray 129 to move up and down, thereby controlling the size of the cavity in the pellet container 15. Figure 7 Different colored stripes of paint are applied to the threaded screw 1210 shown. Figure 9 By observing the color of the threaded screw 1210 through the square window, the height of the pellet tray 129 can be determined, ultimately revealing the size of the pellet container. The guide sleeve 121 and turbine 125 are fitted into the threaded screw 1210. The inner ring of the second bearing 123 abuts against the stepped circular surface of the housing 124. The inner ring of the upper end cover 122 abuts against the guide sleeve 121. The stepped surface of the inner ring of the housing 124 abuts against the stepped surface of the outer ring of the upper end cover 122. The protective cylinder 127 is fixedly connected to the housing 124 by the seventh bolt 126, and then fixed to the pellet tank support plate 13 by the eighth bolt 1211. A square observation window is provided at a corresponding position on the side wall of the pellet tank 15.

[0052] Considering the excitation of the vibration isolator, to ensure sufficient collision and friction of the particles within the damper when the excitation is constant, the size of the damper cavity needs to be adjusted appropriately so that the particles can overcome resistance and reach the wall of the particle tank 15 for collision and friction. When particle 16 approaches the wall of particle tank 15, due to its high speed, initial contact occurs between particle 16 and the wall. In this stage, the kinetic energy of particle 16 mainly overcomes air resistance and the microscopic unevenness between particle 16 and the wall, causing particle 16 to gradually decelerate. As the contact between particle 16 and the wall deepens, deformation and elastic changes occur between particle 16 and the wall. During this process, the kinetic energy of particle 16 is gradually converted into deformation energy and elastic potential energy, accompanied by some energy dissipation. As particle 16 continues to move towards the wall, the deformation and elastic changes reach their limit, and particle 16 can no longer move forward, beginning to undergo relative displacement. During the sliding phase, the kinetic energy of particle 16 is mainly converted into heat and sound energy, causing the total energy of the system to gradually decrease. When particle 16 stops moving and the pressure reaches its maximum, it will briefly remain on the wall surface. This process is called stillness. Afterward, due to elastic deformation and gravity, particle 16 may rebound, which also generates some energy dissipation. If the particle container 15 is too large, it will absorb too much energy during the compression process. The resistance encountered by particle 16 during its movement will exceed the range that its kinetic energy can overcome, making it unable to reach the wall surface for collision. This means that particle 16 cannot effectively convert kinetic energy into heat or other forms of energy through the damper. At the same time, the movement of particle 16 is unstable, the system response is limited, and uneven particle accumulation will occur, affecting the normal operation and performance of the system and reducing the overall vibration isolation effect.

[0053] The internal casting particle pipeline of the magnetic pump 9 is as follows: Figure 2 As shown, when the vibration isolator is under pressure, the ball screw 6 moves downward, causing the inner sleeve 92 to rotate via the action of the balls 8. The one-way bearing 91 locks, thus the inner sleeve 92 drives the magnet bracket 93 to rotate, thereby rotating the magnetic pump 9. Through the action of the strong magnet 94 in the magnetic pump 9, the particles 16 are attracted to the magnetic pump 9. The rotation of the magnetic pump 9 causes the particles 16 to rotate one by one in an orderly manner. Figures 3 to 4As the particle displacement changes, the particles 16 are driven into the first hose 17 and begin to move along the outlet direction of the first hose 17. As more and more particles 16 are in the first hose 17, the particles 16 will eventually reach the end of the first hose 17. Due to gravity, the particles 16 fall into the particle tank 15. Inside the pipe, due to the interaction force between the particles 16 and the friction force of the pipe wall, the inside of the pipe should be as smooth as possible to facilitate the movement of the particles 16. During the rebound of the vibration isolator, the ball screw 6 moves upward, and through the action of the balls 8, the inner sleeve 92 of the screw is driven to rotate. The one-way bearing 91 is unlocked, and the magnetic pump 9 continues to rotate due to inertia. This reciprocating motion causes the magnetic pump 9 to rotate continuously, forming a cyclical motion of the particles 16. The purpose of the single-section universal joint 5 is to ensure that the lower half of the ball screw 6 only moves vertically and does not deflect, so as to protect the ball screw 6 from bending under force.

[0054] Specifically, the magnetic pump 9 is connected to the pellet tank 15 via a first hose 17 and a second hose 18. The position of the double screw lift 12 is adjusted as needed to control the volume of the pellet tank 15, ensuring that the pellets 16 can reach the wall of the pellet tank 15 for collision and friction when the vibration isolator is under pressure. After the pellets 16 enter the pellet tank 15, the pellet tray 129 holds the pellets 16. Due to the action of the strong magnet 94 of the magnetic pump 9, the pellets are then attracted back to the magnetic pump 9 through the second hose 18 to form a pellet 16 circulation. Due to gravity, the pellets 16 continuously fall and collide with the side plate 151 and the cavity wall of the pellet tank 15. The vibration isolation effect of the vibration isolator is achieved through the compression deformation of the compression spring 2 and the collision and friction of the pellets 16.

[0055] Working principle:

[0056] (1) When the vibration isolator is subjected to longitudinal pressure, the vibration isolation effect is achieved by the compression deformation of the compression spring 2. At the same time, when the upper support frame 1 is pressed downward, it drives the ball screw 6 to move downward. Through the action of the ball 8, the inner sleeve 92 of the screw is rotated. The one-way bearing 91 is locked. The inner sleeve 92 of the screw drives the magnet bracket 93 to rotate, thereby causing the magnetic pump 9 to rotate. Through the action of the strong magnet 94 in the magnetic pump 9, the particles 16 are attracted into the magnetic pump 9. The rotation of the magnetic pump 9 drives the particles 16 to rotate, thereby driving the particles 16 to enter the first hose 17 in an orderly and regular manner. Then, the particles 16 are transported to the particle tank 15 through the first hose 17.

[0057] (2) The pellet tank 15 of the present invention is a center-opening type, which is convenient for installation and later replacement. The pellet tank 15 is provided with a side plate 151. When the pellets 16 enter the pellet tank 15 through the first hose 17 by the adsorption of the magnetic pump 9, the presence of the side plate 151 can increase the effective number of collisions and dissipate more energy, thus avoiding the accumulation of pellets 16 in a short period of time after entering the pellet tank 15. This can effectively solve the problem of insufficient collision and accumulation of pellets caused by the small amplitude of traditional pellet damping vibration isolators.

[0058] (3) A double screw lift 12 is designed below the pellet tank 15. The worm gear 128 is manually rotated to drive the turbine 125 to rotate, thereby driving the screw 1210 to move up and down, and finally driving the pellet tray 129 to move up and down, thereby controlling the size of the cavity of the pellet tank 15. Different colored stripes are painted on the screw 1210. By observing the color of the stripes on the screw 1210, the height of the pellet tray 129 can be known, and the size of the pellet container can be known. A second flexible hose 18 is connected to the bottom of the pellet tray 129. The other end of the second flexible hose 18 is connected to the magnetic pump 9, thereby forming a cyclic collision of the pellets 16. During the rebound of the vibration isolator, the ball screw 6 moves upward, and the inner sleeve 92 of the screw is driven to rotate by the action of the balls 8. The one-way bearing 91 is unlocked, and the magnetic pump 9 continues to rotate due to inertia. This reciprocating motion causes the magnetic pump 9 to rotate continuously, forming the cyclical motion of the particles 16. The purpose of the single-section universal joint 5 is to ensure that the lower half of the ball screw 6 only moves vertically and does not deflect, so as to protect the ball screw 6 from bending under force.

[0059] Installation steps:

[0060] (1) The lower support frame 3 is first determined and fixed to the on-site installation position. On this basis, the pellet tank pallet 13 is fixed to the lower support frame 3 by the third bolt 14. Thus, the positions of the pellet tank 15 and the double screw jack 12 can be determined.

[0061] (2) To install the double screw jack 12, first insert the inner ring of the upper guide sleeve 121 into the screw jack 1210, then abut the inner ring of the second bearing 123 against the outer ring of the worm gear 125, and then insert them together into the screw jack 1210. Next, insert the inner ring of the lower guide sleeve 121 into the screw jack 1210. Then, install the assembled parts of the second bearing 123 and the worm gear 125 into the housing 124. Next, abut the outer ring of the third bearing 1214 against the worm gear 128, inserting it laterally into the housing 124. Secure the worm gear 128 with the retaining ring 1213. Finally, turn the handwheel 121... 2. Install the upper end cover 122 on the worm gear 128 and insert it into the upper end of the threaded screw 1210. The inner ring of the upper end cover 122 abuts against the upper guide sleeve 121. The outer ring of the upper second bearing 123 abuts against the stepped circular surface of the upper end cover 122. The outer ring of the lower second bearing 123 abuts against the stepped circular surface of the housing 124. The particle tray 129 is welded to the upper end of the threaded screw 1210. The protective cylinder 127 is fixedly connected to the housing 124 by the seventh bolt 126. Then, the protective cylinder 127 is fixed to the particle tank support plate 13 by the eighth bolt 1211. The installation of the double screw jack 12 is completed.

[0062] (3) Connect the first hose 17 to the top inlet of the pellet tank 15, and connect one end of the second hose 18 to the pellet tray 129 at the bottom of the pellet tank 15. The pellet tank 15 is open in the middle and has a hole so that the first hose 17 and the second hose 18 can pass through the pellet tank 15. Pass the other end of the second hose 18 through the hole left on the pellet tank 15. Weld an inclined side plate 151 inside the pellet tank 15, which is conducive to the pellets 16 colliding and dissipating more energy. During operation, the pellet tank 15 is closed by the eleventh bolt 153 and then fixedly connected to the pellet tank tray 13 by the tenth bolt 152. The installation of the pellet tank 15 is completed.

[0063] (4) Fix the magnetic pump support plate 10 to the lower support frame 3 with the second bolt 11, fix the fixed support 97 to the magnetic pump support plate 10 with the sixth bolt 912, fix the hose bracket 98 to the fixed support 97 with the fifth bolt 911, insert the first bearing 99 from below the inner sleeve 92 of the screw, and tighten the limit nut 910 to fix the position of the first bearing 99, insert the first bearing 99 together with the inner sleeve 92 of the screw into the fixed support 97, so that the outer ring of the first bearing 99 abuts against the upper end face of the stepped circle of the fixed support 97, put the bearing limit ring 95 from above the inner sleeve 92 of the screw, and fix the fixed support 97 and the bearing limit ring 95 with the fourth bolt 96, abut the outer ring of the bottom surface of the one-way bearing 91 against the upper end face of the stepped circle of the inner sleeve 92 of the screw, abut the outer ring of the one-way bearing 91 against the inner ring of the magnet bracket 93, fix the strong magnet 94 at the outer end of the magnet bracket 93, and install the magnetic pump 9 assembly symmetrically;

[0064] (5) The ball screw 6 is inserted into the assembled magnetic pump 9 assembly through the ball 8. The upper end of the ball screw 6 is welded to the single-section universal shaft 5. The upper end of the single-section universal shaft 5 is welded to the upper top plate 4. The other end of the second hose 18 is connected to the inlet of the magnetic pump 9. The first hose 17 is used to connect the top of the granule tank 15 and the outlet of the magnetic pump 9. One end of the compression spring 2 is welded to the lower support frame 3, and the other end is welded and fixed to the upper support frame 1. The upper top plate 4 and the upper support frame 1 are fixedly connected by the first bolt 7. The installation is completed.

[0065] In addition to the above embodiments, this application may have other implementation methods. All technical solutions formed by equivalent substitution or equivalent transformation fall within the protection scope claimed by this application.

Claims

1. A circulating particle damping vibration isolator, characterized in that: The system includes a support assembly and a particle circulation assembly. The support assembly includes an upper support frame (1), a compression spring (2), and a lower support frame (3). The particle circulation assembly includes a magnetic pump (9), a ball screw (6), a particle tank (15), particles (16), a first hose (17), and a second hose (18). The upper support frame (1) is provided with bolt holes for connecting mechanical equipment. The upper top plate (4) is fixedly connected to the upper support frame (1) by a first bolt (7). The upper end of the ball screw (6) is fixedly connected to the upper top plate (4), and the lower end is rotatably connected to the magnetic pump (9). The lower support frame (3) is provided with anchor bolt holes for fixing to the foundation. The magnetic pump support plate (10) is connected to the magnetic pump by a first bolt (7). Two bolts (11) are fixedly connected to the lower support frame (3). The pellet tank tray (13) is fixedly connected to the lower support frame (3) by a third bolt (14). One end of the compression spring (2) is welded and fixed to the upper support frame (1), and the other end is welded and fixed to the lower support frame (3). The middle part of the magnetic pump (9) is rotatably connected to the ball screw (6), and the bottom is fixedly connected to the magnetic pump tray (10). The magnetic pump (9) also includes a one-way bearing (91), a screw inner sleeve (92), a magnet bracket (93), a strong magnet (94), a bearing limit ring (95), a fourth bolt (96), a fixed support (97), a hose bracket (98), and a first bearing (99). The ball screw (6) is helically inserted into the inner sleeve (92). The outer ring of the bottom surface of the one-way bearing (91) abuts against the upper end face of the stepped circle of the inner sleeve (92). The outer ring of the one-way bearing (91) abuts against the inner ring of the magnet bracket (93). A strong magnet (94) is fixed at the outer end of the magnet bracket (93). The outer ring of the top surface of the first bearing (99) abuts against the bearing limiting ring (95). The bearing limiting ring (95) is fixedly installed at the top of the fixed support (97). The inner ring of the top surface of the first bearing (99) abuts against the side of the stepped circle of the inner sleeve (92). The outer ring of the bottom surface of the first bearing (99) abuts against the upper end face of the stepped circle of the inner sleeve (92). On the stepped surface of the mounting hole of the fixed support (97), the inner ring of the bottom surface of the first bearing (99) abuts against the limiting nut (910). The hose bracket (98) is fixedly connected to the fixed support (97) by the fifth bolt (911). The fixed support (97) and the magnetic pump support plate (10) are fixed by the sixth bolt (912). One end of the first hose (17) is connected to the outlet of the magnetic pump (9), and the other end is connected to the top inlet of the pellet tank (15). One end of the second hose (18) is connected to the inlet of the magnetic pump (9), and the other end is connected to the bottom outlet of the pellet tank (15). The pellet tank (15) is fixedly connected to the pellet tank support plate (13) by the tenth bolt (152).

2. The cyclic particle damping vibration isolator according to claim 1, characterized in that: A single-section universal joint (5) is provided between the ball screw (6) and the upper top plate (4). The upper end of the single-section universal joint (5) is welded to the upper top plate (4), and the lower end is welded to the upper end of the ball screw (6).

3. The circulating particle damping vibration isolator according to claim 1, characterized in that: The compression spring (2) has a wire diameter of 10-50 mm and a pitch of 10-50 mm.

4. The cyclic particle damping vibration isolator according to claim 2, characterized in that: The number of particle circulation components is two, which are symmetrically arranged with respect to the center line of the upper support frame (1) in the length direction.

5. The cyclic particle damping vibration isolator according to claim 1, characterized in that: The material of the hose bracket (98) is acrylic.

6. The cyclic particle damping vibration isolator according to claim 4, characterized in that: The pellet container (15) is a square, open-center type, and the pellet container (15) is closed by the eleventh bolt (153).

7. The cyclic particle damping vibration isolator according to claim 1, characterized in that: The particles (16) are round particles with a filling rate of 20%-90%, and are spheres with a diameter of 0.1mm-10mm. The material is steel particles.

8. The cyclic particle damping vibration isolator according to claim 1, characterized in that: The pellet tank (15) has a downwardly sloping side plate (151) welded inside.

9. The cyclic particle damping vibration isolator according to claim 6, characterized in that: Inside the pellet tank (15), a double screw jack (12) is also provided between it and the pellet tank tray (13). The double screw jack (12) includes a guide sleeve (121), an upper end cover (122), a second bearing (123), a housing (124), a turbine (125), a seventh bolt (126), a protective cylinder (127), a worm gear (128), a pellet tray (129), a threaded screw (1210), an eighth bolt (1211), a handwheel (1212), a snap ring (1213), and a third bearing (1214). The pellet tray (129) is welded to the top of the threaded screw (1210). The second hose (18) passes through the pellet tray (129) and extends into the bottom outlet of the pellet tank (15). The guide sleeve (121) and the turbine (125) are fitted onto the threaded screw. In 1210), the worm (128) and the turbine (125) are engaged. The end of the worm (128) is connected to the handwheel (1212) and fixed to the housing (124) through the engagement of the third bearing (1214) and the snap ring (1213). The inner ring of the second bearing (123) abuts against the stepped circular surface of the housing (124). The inner ring of the upper end cover (122) abuts against the guide sleeve (121). The stepped surface of the inner ring of the housing (124) abuts against the stepped surface of the outer ring of the upper end cover (122). The protective cylinder (127) is fixedly connected to the housing (124) by the seventh bolt (126). The protective cylinder (127) is fixed to the pellet tank support plate (13) by the eighth bolt (1211). The threaded screw (1210) is painted with different colored stripes. A square observation window is opened at the corresponding position on the side wall of the pellet tank (15).

10. An assembly method applicable to the cyclic particle damping vibration isolator as described in claim 9, characterized in that, The steps are as follows: (1) The lower support frame (3) is first determined and fixed to the on-site installation position. On this basis, the granulator tray (13) is fixed to the lower support frame (3) by the third bolt (14). (2) Install the double screw jack (12). First, insert the inner ring of the upper guide sleeve (121) into the screw thread (1210). Then, abut the inner ring of the second bearing (123) against the outer ring of the worm gear (125) and put them together into the screw thread (1210). Insert the inner ring of the lower guide sleeve (121) into the screw thread (1210). Put the assembled parts of the second bearing (123) and worm gear (125) into the housing (124). Abut the outer ring of the third bearing (1214) against the worm gear (128) from both ends and insert it horizontally into the housing (124). Fix the worm gear (128) with the snap ring (1213). Turn the handwheel (1212) into place. Installed on the worm (128), the upper end cover (122) is inserted from the upper end of the threaded screw (1210). The inner ring of the upper end cover (122) abuts against the upper guide sleeve (121), the outer ring of the upper second bearing (123) abuts against the stepped circular surface of the upper end cover (122), and the outer ring of the lower second bearing (123) abuts against the stepped circular surface of the box body (124). The particle tray (129) is welded to the upper end of the threaded screw (1210). The protective cylinder (127) is fixedly connected to the box body (124) by the seventh bolt (126). Then, the protective cylinder (127) is fixed to the particle tank pallet (13) by the eighth bolt (1211). The double screw jack (12) is installed. (3) Connect the first hose (17) to the top inlet of the pellet tank (15), connect one end of the second hose (18) to the pellet tray (129) at the bottom of the pellet tank (15), and pass the other end of the second hose (18) through the hole left on the pellet tank (15). When running, the pellet tank (15) is closed by the eleventh bolt (153), and then fixed to the pellet tank tray (13) by the tenth bolt (152). The installation of the pellet tank (15) is completed. (4) Fix the magnetic pump support plate (10) to the lower support frame (3) with the second bolt (11), fix the fixed support (97) to the magnetic pump support plate (10) with the sixth bolt (912), fix the hose bracket (98) to the fixed support (97) with the fifth bolt (911), insert the first bearing (99) from under the lead screw inner sleeve (92), and tighten the limit nut (910) to fix the position of the first bearing (99). Insert the first bearing (99) together with the lead screw inner sleeve (92) into the fixed support. Inside 97), the outer ring of the first bearing (99) abuts against the upper end face of the stepped circle of the fixed support (97), the bearing limiting ring (95) is put on from above the inner sleeve of the screw (92), and the fixed support (97) and the bearing limiting ring (95) are fixedly connected by the fourth bolt (96), the outer ring of the bottom surface of the one-way bearing (91) abuts against the upper end face of the stepped circle of the inner sleeve of the screw (92), the outer ring of the one-way bearing (91) abuts against the inner ring of the magnet bracket (93), and a strong magnet (94) is fixed at the outer end of the magnet bracket (93). The magnetic pump (9) assembly is symmetrically installed. (5) The ball screw (6) is inserted into the assembled magnetic pump (9) assembly through the ball (8). The upper end of the ball screw (6) is welded to the single-section universal shaft (5). The upper end of the single-section universal shaft (5) is welded to the upper top plate (4). The other end of the second hose (18) is connected to the inlet of the magnetic pump (9). The first hose (17) is used to connect the top of the pellet tank (15) and the outlet of the magnetic pump (9). One end of the compression spring (2) is welded to the lower support frame (3), and the other end is welded and fixed to the upper support frame (1). The upper top plate (4) and the upper support frame (1) are fixedly connected by the first bolt (7). The installation is completed.

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