Air damping and spring damping combined vibration isolation device and control method

Abstract

The invention discloses an air damping and spring damping composite vibration isolation device which comprises a mounting base, a load platform, a spring damping structure arranged on the mounting base and used for supporting the load platform, and a pre-pressing fastening structure used for adjusting the distance between the mounting base and the load platform. The buffering air bag is provided with a pneumatic integrated system, and the pneumatic integrated system comprises a sensor, an inflation and deflation device for controlling the air pressure in the buffering air bag and a matched control center. The invention further provides a vibration isolation control method. The device provided by the invention can realize efficient isolation and effective buffering of low-frequency vibration.

Description

Technical Field

[0001] The invention belongs to the field of environmental vibration and noise control, and in particular relates to a vibration isolation device and a control method of a composite of air damping and spring damping. Background Art

[0002] In the pursuit of efficiency, comfort and safety in modern industry and daily life, vibration control has become one of the indispensable key technologies. With the rapid development of precision instruments, high-end equipment, aerospace, transportation and green buildings, the requirements for vibration isolation and buffering technology are becoming increasingly stringent. Although traditional vibration isolators such as spring-type are widely used, they are often unable to cope with low-frequency and large-amplitude vibrations, and it is difficult to meet the high standard requirements for both vibration isolation effect and stability.

[0003] Patent document CN217132256U discloses an intelligent air bag vibration isolation device, including a basic platform, an equipment platform, a vibration element, multiple groups of vibration isolation structures and an air supply control structure. The equipment platform is arranged above the basic platform, and the vibration element is arranged on the equipment platform. Each group of vibration isolation structures includes two vibration isolation components. The vibration isolation component includes a support frame and an air bag. The support frame is arranged on the basic platform, and the bottom of the air bag is installed between the support frame and the equipment platform. The air supply control structure includes an air compressor, a distance sensor and a vibration sensor. The distance sensor is used to detect the distance between the basic platform and the equipment platform in real time. The air compressor inflates or deflates the air bag to keep the equipment platform level. The vibration sensor is used to detect the vibration acceleration of the basic platform in real time. The air compressor is used to inflate or deflate the air bag to adjust the thickness of the air bag to weaken or isolate the vibration of the equipment platform.

[0004] Patent document CN118756915A discloses an active floating floor vibration isolation device for buildings, comprising: a fixed base, a first vibration isolation block is inserted on the top, and a top plate is arranged on the top of the first vibration isolation block; a vibration isolation assembly is arranged inside the fixed base, and the vibration isolation assembly includes a cushion block; a fixed assembly is arranged on the upper end surface of the cushion block, and the fixed assembly includes a fixed block; a third airbag elastically arranged is pressed down by the bottom of the first vibration isolation block, so that the gas inside the third airbag is discharged to the fourth airbag, and the fourth airbag expands to push the fixed block to the inside of the fixed groove, and then the first vibration isolation block is fixed to the inside of the fixed base through the cooperation of the fixed block and the fixed groove, and the gas inside the sixth airbag is discharged to the fifth airbag by squeezing the abutting block, and the fifth airbag expands and pushes the top block to abut the fixed block, so that the fixed block withdraws from the inside of the fixed groove, completing the separation of the fixed base and the first vibration isolation block. Summary of the invention

[0005] The object of the present invention is to provide a vibration isolation device and a control method of a composite of air damping and spring damping, which can achieve efficient isolation and effective buffering of low-frequency vibrations.

[0006] In order to achieve the first object of the present invention, the following technical solution is provided: An air damping and spring damping composite vibration isolation device comprises a mounting base and a load platform, a spring damping structure arranged on the mounting base for supporting the load platform, and a pre-compression fastening structure for adjusting the distance between the mounting base and the load platform; The spring damping structure comprises a buffer airbag fixed on a mounting base and having an inflatable tube on the top, a spring base arranged on the top of the buffer airbag, a first avoidance opening for the inflatable tube to pass through is arranged at the center of the spring base, and a damping spring arranged coaxially with the inflatable tube is arranged on the spring base, and the other end of the damping spring is connected to the bottom of the load platform; The cushion airbag is equipped with a pneumatic integrated system, which includes a sensor, a charging and discharging device for controlling the air pressure in the cushion airbag, and a matching control center; The sensor is used to collect vibration data of the mounting base; The control center compares the vibration data of the mounting base with the threshold value and generates a corresponding control instruction; The inflation and deflation device completes the inflation or deflation of the cushion airbag according to the input control instructions.

[0007] The present invention combines the excellent damping characteristics of the airbag with the efficient load-bearing and rebound capabilities of the spring, and achieves efficient isolation and effective buffering of low-frequency vibrations through a carefully designed composite structure.

[0008] Specifically, the pre-compression fastening structure includes a support frame fixed on the mounting base, a screw rod with one end fixed to the bottom of the load platform, and an adjusting nut threadedly sleeved on the screw rod; The support frame includes a pair of support rods and an adjustment plate spanning between the two support rods. The adjustment plate is provided with a second avoidance opening for the screw rod to pass through. The adjustment nut is located at the part after the screw rod passes through the second avoidance opening, thereby providing an effective pre-tightening force to ensure that the vibration isolation device will not tilt, twist, or other problems.

[0009] Specifically, there are two pre-compression and fastening structures, and the two pre-compression and fastening structures are symmetrically arranged around the center of the installation base.

[0010] Specifically, there are a plurality of spring damping structures, and the plurality of spring damping structures are arranged at equal intervals along the edge of the mounting base.

[0011] Specifically, the buffer airbag includes an oblate spherical airbag and a cone-shaped airbag.

[0012] Specifically, the conical airbag includes a columnar portion arranged on a mounting base and a trapezoidal portion connected to the upper end of the columnar portion, and a connecting hole for connecting an inflation tube is arranged on a short bottom side of the trapezoidal portion.

[0013] Specifically, the cushioning airbag is also provided with a protective cover for protecting the airbag and slowing down its corrosion and aging degree.

[0014] Specifically, the vibration data includes vibration acceleration value and vibration amplitude.

[0015] In order to achieve the second object of the present invention, the following technical solution is provided: a vibration isolation control method is implemented by the above-mentioned vibration isolation device combined with air damping and spring damping, comprising: Sending inflation control instructions to the inflation and deflation device through the control center causes the cushioning airbag to inflate to lift the load platform; The preload force between the mounting base and the load platform is adjusted by a preload fastening structure; The vibration acceleration value of the mounting base is collected in real time through the sensor set on the mounting base, and the following control cycle is executed: When the vibration acceleration value of the mounting base is less than the threshold value, an inflation control instruction is generated to the inflation and deflation device; When the vibration velocity difference between the load platform and the mounting base is equal to the threshold, no action is taken.

[0016] Specifically, the threshold value is the national vibration standard limit value.

[0017] Compared with the prior art, the present invention has the following beneficial effects: The present invention not only enhances the nonlinear characteristics of the vibration isolation system by introducing the airbag, enabling it to more flexibly adapt to vibration environments of different frequencies and amplitudes, but also realizes dynamic adjustment and optimization of the vibration isolation performance through its internal air pressure regulation mechanism; at the same time, the spring, as the main load-bearing and rebound element, ensures the stability and durability of the vibration isolator when it is subjected to large loads. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A schematic diagram of the structure of the vibration isolation device provided in this embodiment; Figure 2 A schematic diagram of the vibration isolation control method provided in this embodiment; In the figure, 1. load platform; 2. damping spring; 3. spring base; 4. cushion airbag; 5. inflation tube; 6. inflation and deflation device; 7. control center; 8. sensor; 9. mounting base; 10. protective cover; 11. pre-compression fastening structure. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0020] like Figure 1 As shown, the vibration isolation device provided in this embodiment includes a mounting base 9 and a load platform 1, as well as a spring damping structure arranged on the mounting base 9 for supporting the load platform 1 and a pre-compression fastening structure 11 for adjusting the distance between the mounting base 9 and the load platform 1; The spring damping structure includes a buffer airbag 5 fixed on a mounting base 9 and having an inflation tube 7 on the top, a spring base 3 arranged on the top of the buffer airbag 5, a first avoidance opening for the inflation tube 7 to pass through is provided at the center of the spring base 3, and the spring base 3 is provided with a damping spring 2 coaxially arranged with the inflation tube, and the other end of the damping spring 2 is connected to the bottom of the load platform 1.

[0021] The cushion airbag 5 is equipped with a pneumatic integrated system, which includes a sensor 8, a charging and discharging device 6 for controlling the air pressure in the cushion airbag 5, and a matching control center 7; The sensor 8 is used to collect vibration data of the mounting base and the load platform; The control center 7 generates corresponding control instructions according to the difference between the vibration data of the mounting base 9 and the load platform 1; The sensor 8 is used to collect vibration data of the mounting base 9; The control center 7 compares the vibration data of the mounting base 9 with the threshold value and generates a corresponding control instruction. The inflation and deflation device 6 completes the inflation or deflation of the cushion airbag 5 according to the input control instructions.

[0022] The central part of the load platform 1 is provided with a device connection hole for installation and connection of the device.

[0023] The mounting base 9 is also provided with ground fixing screw holes for fixing to the ground.

[0024] More specifically, the shape of the load platform 1 includes but is not limited to square or circular; the damping spring 2 is fixedly connected to the load platform 1 at its upper end and fixedly connected to the top of the buffer airbag 5 at its lower end. The model of the damping spring 2 needs to be appropriately selected according to the load weight. At the same time, in order to further optimize the vibration reduction and isolation effect, the spring base 3 is installed at both ends of the damping spring 2, and the material of the spring base is not limited to materials such as rubber or polyurethane.

[0025] The cushion airbag 5 achieves efficient vibration isolation for loads of different sizes by adjusting the size of the air pressure delivered to the airbag by the air supply pipe. The top of the cushion airbag 5 is connected to the bottom of the damping spring 2 through a specific structure, so that the vibration transmitted from the load platform 1 is first attenuated by the spring system to reduce most of the medium and high frequency vibrations, and the low-frequency vibrations that cannot be attenuated by the spring system are transmitted to the air damping system, and the cushion airbag 5 attenuates the remaining low-frequency vibrations, so that very little vibration can be delivered to the mounting base 9, or even the roof and the ground, greatly reducing the pollution of vibration noise to the environment. In addition, the cushion airbag 5 and the damping spring 2 are not limited to series connection, but can also be connected in parallel. There is a ground fixing screw hole on both sides of the mounting base 9 for fixing the vibration isolation device.

[0026] In addition, the damping spring 2 and the buffer airbag 5 include but are not limited to the installation design method of the spring on top and the airbag on the bottom, and can also be a method in which the two are side by side, the airbag on top and the spring on the bottom.

[0027] At the same time, in order to prevent the cushioning airbag 5 from tipping over in this embodiment, its structure uses an oblate spherical airbag and a cone-shaped airbag; The cone-shaped airbag comprises a columnar portion arranged on a mounting base and a trapezoidal portion connected to the upper end of the columnar portion, and a connecting hole for connecting an inflation tube is arranged on a short bottom side of the trapezoidal portion.

[0028] The pre-stressing fastening structure 11 is composed of a support frame, a screw and an anti-slip nut. The pre-stressing fastening structure 11 has two functions. First, it gives a certain initial pressure to the spring and the airbag according to the application conditions. In actual working conditions, the weight of different load-bearing feet of the equipment is often inconsistent, so applying a certain pre-stress to the vibration isolation device can ensure stability as much as possible. Second, there is a pre-stressing fastening structure 11 on both sides of the vibration isolation device, which greatly ensures that the vibration isolation device will not tilt, twist or have other problems.

[0029] The protective cover 10 is divided into two parts, one large and one small, which are nested. The upper part is fixedly connected to the load platform 1 to protect the internal spring system and the air supply pipe, and the lower part is fixedly connected to the mounting base 9 to protect the airbag structure and prevent the airbag from tilting. Some heat-insulating and moisture-proof materials are stuffed inside the lower protective cover to protect the airbag and slow down its corrosion and aging.

[0030] This embodiment also provides a vibration isolation control method, which is implemented by the vibration isolation device with air damping and spring damping composite provided in the above embodiment, including: Sending inflation control instructions to the inflation and deflation device through the control center causes the cushioning airbag to inflate to lift the load platform; The preload force between the mounting base and the load platform is adjusted by a preload fastening structure; The vibration acceleration value of the mounting base is collected in real time through the sensor set on the mounting base, and the following control cycle is executed: When the vibration acceleration value of the mounting base is greater than a threshold value, an inflation control instruction is generated to the inflation and deflation device; When the vibration acceleration value of the mounting base is less than or equal to the threshold, no operation is performed.

[0031] In this example, the sensors include but are not limited to acceleration sensors, displacement sensors, air pressure sensors, and force sensors, and the sensors are respectively arranged below the load platform and on the bottom plate of the vibration isolator to monitor the vibration of the equipment and the numerical value when the vibration is transmitted to the ground. The numerical value detected by the sensor is fed back to the control center so that the control center can adjust the size of the air damping in real time to achieve the best vibration isolation effect; the intelligent control center judges the vibration of the equipment based on the vibration signal fed back by the sensor, and controls the air pump to pump air into the air chamber through an artificial intelligence algorithm, thereby achieving control and adjustment of the air damping.

[0032] More specifically, when a mechanical device needs to be vibration isolated, first confirm the weight of the mechanical device and, based on the performance manual of the air damping product, control the pneumatic integrated system through the control center 7 so that the air pressure in the air damping reaches the air pressure value corresponding to the highest vibration isolation efficiency. Furthermore, place the device under the mechanical device and fix it to the load platform 1 through bolts. When the mechanical device is running, it will generate large vibrations. At this time, the sensor 8 of the composite damping vibration isolation device will continuously collect the acceleration values ​​on the load platform and the base plate, and compare and analyze the acceleration value of the base plate with the national vibration standard limit. When it is judged that the acceleration value of the base plate is lower than the national vibration standard limit, it indicates that the vibration isolation condition is very good at this time, and the vibration transmitted to the ground or roof by the mechanical device is very small, which fully meets the national standard requirements. At this time, no adjustment is required. When the data collected by the acceleration sensor of the base plate is greater than the national vibration standard limit, it indicates that the vibration isolation efficiency is not enough to attenuate the vibration below the national standard. The ground or floor will be affected by the vibration. On the one hand, there is a safety hazard of floor collapse. On the other hand, the residents downstairs will also be affected by the sound transmission of the solid structure, affecting their physical and mental health. In order to prevent such problems from occurring, it is necessary to adjust the composite damping vibration isolator in real time through artificial intelligence. The specific adjustment method is as follows: when the sensor detects that the acceleration value of the base plate exceeds the national vibration standard limit, the intelligent control center controls the pneumatic integrated system to reduce the air pressure inside the air damper continuously. During this process, the sensor is also continuously collecting data and comparing the collected data with the national vibration standard to observe whether the detection value is gradually approaching the national vibration standard limit as the air pressure decreases. If this is the trend, continue to reduce the air pressure of the air damper until it is lower than the national vibration limit. If it is observed that the detection value is higher than the national vibration standard limit as the air pressure decreases, such operation must be stopped, and the intelligent control center controls the pneumatic integrated system to increase the air pressure inside the air damper, and continues to cycle the sensor detection, data comparison and other procedures until the detected data is lower than the national standard, the pneumatic integrated system maintains the status quo, and the composite damping vibration isolation device maintains the best working condition.

[0033] In addition, the terms "upper", "lower", "inner", "outer", "front", "rear" are used for descriptive purposes only and should not be understood as indicating or implying relative importance. Unless otherwise specifically stated, the relative steps, numerical expressions and values ​​of the components and steps described in these embodiments do not limit the scope of the present invention.

[0034] Of course, the above description is only a specific embodiment of the present invention and is not intended to limit the scope of implementation of the present invention. All equivalent changes or modifications made according to the structure, characteristics and principles described in the patent application scope of the present invention should be included in the patent application scope of the present invention.

[0035] Finally, it should be noted that the above-described embodiments are only specific implementations of the present invention, which are used to illustrate the technical solutions of the present invention, rather than to limit them. The protection scope of the present invention is not limited thereto. Although the present invention is described in detail with reference to the above-described embodiments, ordinary technicians in the field should understand that any technician familiar with the technical field can still modify the technical solutions recorded in the above-described embodiments within the technical scope disclosed by the present invention, or can easily think of changes, or make equivalent replacements for some of the technical features therein; and these modifications, changes or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention, and should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. A vibration isolation device with air damping and spring damping, characterized in that: It includes a mounting base and a load platform, as well as a spring damping structure arranged on the mounting base for supporting the load platform and a pre-compression fastening structure for adjusting the distance between the mounting base and the load platform; The spring damping structure comprises a buffer airbag fixed on a mounting base and having an inflatable tube on the top, a spring base arranged on the top of the buffer airbag, a first avoidance opening for the inflatable tube to pass through is arranged at the center of the spring base, and a damping spring arranged coaxially with the inflatable tube is arranged on the spring base, and the other end of the damping spring is connected to the bottom of the load platform; The cushion airbag is equipped with a pneumatic integrated system, which includes a sensor, a charging and discharging device for controlling the air pressure in the cushion airbag, and a matching control center; The sensor is used to collect vibration data of the mounting base; The control center compares the vibration data of the mounting base with the threshold value and generates a corresponding control instruction; The inflation and deflation device completes the inflation or deflation of the cushion airbag according to the input control instructions.

2. The vibration isolation device with air damping and spring damping composite according to claim 1, characterized in that: The pre-compression fastening structure comprises a support frame fixed on the mounting base, a screw rod fixed at one end to the bottom of the load platform, and an adjusting nut threadedly sleeved on the screw rod; The support frame includes a pair of support rods and an adjustment plate spanning between the two support rods. The adjustment plate is provided with a second avoidance opening for the screw rod to pass through, and the adjustment nut is located at the part of the screw rod after it passes through the second avoidance opening.

3. The vibration isolation device with air damping and spring damping composite according to claim 1 or 2, characterized in that: There are two pre-compression and fastening structures, and the two pre-compression and fastening structures are symmetrically arranged around the center of the installation base.

4. The vibration isolation device with air damping and spring damping composite according to claim 1, characterized in that: There are multiple spring damping structures, and the multiple spring damping structures are arranged at equal intervals along the edge of the mounting base.

5. The vibration isolation device with air damping and spring damping composite according to claim 1, characterized in that: The cushioning airbag includes an oblate spherical airbag and a cone-shaped airbag.

6. The vibration isolation device with air damping and spring damping composite according to claim 5, characterized in that: The conical airbag comprises a columnar portion arranged on a mounting base and a trapezoidal portion connected to the upper end of the columnar portion, and a connecting hole for connecting an inflation tube is arranged on a short bottom side of the trapezoidal portion.

7. The vibration isolation device with air damping and spring damping composite according to claim 1, characterized in that: The buffer airbag is also provided with a protective cover.

8. The vibration isolation device with air damping and spring damping composite according to claim 1, characterized in that: The vibration data includes vibration acceleration value and vibration amplitude.

9. A vibration isolation control method, characterized in that: The vibration isolation device is realized by the composite vibration isolation device of air damping and spring damping as claimed in any one of claims 1 to 7, comprising: Sending inflation control instructions to the inflation and deflation device through the control center causes the cushioning airbag to inflate to lift the load platform; The preload force between the mounting base and the load platform is adjusted by a preload fastening structure; The vibration acceleration value of the mounting base is collected in real time through the sensor set on the mounting base, and the following control cycle is executed: When the vibration acceleration value of the mounting base is greater than a threshold value, an inflation control instruction is generated to the inflation and deflation device; When the vibration acceleration value of the mounting base is less than or equal to the threshold, no operation is performed.

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