Anti-swing elastic vibration isolation system

Abstract

The utility model relates to the technical field of vibration control, in particular to an anti-swing elastic vibration isolation system. The device comprises a bearing rack and elastic vibration isolation devices, each elastic vibration isolation device comprises an upper shell, an elastic element and a lower shell, at least two rows and at least two columns of elastic vibration isolation devices are arranged below the bearing rack, and each row is arranged in the longitudinal direction of the bearing rack; wherein one row comprises at least two elastic vibration isolation devices, and transverse limiting structures are arranged in the at least two elastic vibration isolation devices of the row to form a limiting row; each column is arranged in the transverse direction of the bearing rack, one column comprises at least two elastic vibration isolation devices, and longitudinal limiting structures are arranged in the at least two elastic vibration isolation devices of the column to form a limiting column; the at least three elastic vibration isolation devices are provided with vertical limiting structures or at least three vertical limiting devices are arranged between the bearing rack and the bottom foundation. The vibration isolation effect is good, and the overlarge swing amplitude generated by excitation of the bottom foundation can be effectively controlled.

Description

Technical Field

[0001] This invention belongs to the field of vibration control technology and relates to an elastic vibration isolation platform that is installed on a bottom foundation and is subject to swaying. In particular, it is an elastic vibration isolation system suitable for installation on offshore work platforms or high-altitude platforms for active vibration isolation of power equipment or passive vibration isolation of precision equipment. Background Technology

[0002] In the field of power equipment, such as motors and compressors, in order to avoid the adverse effects of vibrations generated during the operation of mechanical equipment on the surrounding environment or equipment, a bearing platform and elastic vibration isolation device are often used to form an elastic vibration isolation foundation. The power equipment is then placed on the elastic vibration isolation foundation. In this way, the vibrations generated by the power equipment during operation are effectively isolated by the elastic vibration isolation foundation, and the adverse effects on the surrounding environment and equipment are greatly reduced. However, traditional elastic vibration isolation foundations (vibration isolation platforms) are mainly designed for equipment working on land, such as the vertical foundation vibration isolation device and foundation vibration isolation system with Chinese authorization announcement number CN202301734U. The bottom foundation is fixed (except in earthquakes). In special working conditions at sea with wind and waves, the bottom foundation is swaying. While isolating vibration, the bearing platform will generate large swaying, which can easily cause damage to the connecting pipes or couplings between adjacent equipment, or damage to the hydraulic bearings of the equipment, resulting in the equipment not working properly. On the other hand, multi-layer offshore platforms located in the open sea have extremely stringent requirements for the weight of the bearing platform, which is often 1 / 10 to 1 / 4 of that of land-based equipment. They are usually made of welded steel sections and steel plates. Compared with land-based buildings, the local load-bearing capacity of such offshore buildings is usually subject to stricter limitations. Excessive swaying will generate large dynamic loads at the vibration isolation device, shortening the fatigue life of the offshore platform.

[0003] Furthermore, power equipment operating on high-altitude platforms on land, such as generators and gearboxes on wind turbine towers, will experience significant swaying due to the tower's swinging under wind excitation, affecting the normal operation of the motors and transmission gearboxes. In addition, some equipment, although located on land, cannot tolerate damage caused by equipment swaying during earthquakes, such as emergency generator sets in nuclear power plants. For these operating conditions, traditional, unrestricted elastic vibration isolation foundations are not safe enough and cannot meet the usage requirements.

[0004] In conclusion, the market urgently needs a vibration isolation platform that can operate safely even under conditions of foundation swaying, while also achieving good vibration isolation effects. Summary of the Invention

[0005] The purpose of this invention is to overcome the above-mentioned defects and provide an anti-sway elastic vibration isolation system that has good vibration isolation effect and can effectively control the excessive swaying amplitude generated by the excitation of the bottom foundation.

[0006] The anti-sway elastic vibration isolation system of the present invention is implemented as follows: It includes a support frame and elastic vibration isolation devices. The elastic vibration isolation devices are located between the support frame and the bottom foundation. Each elastic vibration isolation device includes an upper shell, an elastic element, and a lower shell. The elastic element is located between the upper and lower shells. The upper shell is firmly connected to the support frame, and the lower shell is firmly connected to the bottom foundation. At least two rows and at least two columns of elastic vibration isolation devices are arranged below the support frame. Each row of elastic vibration isolation devices is arranged longitudinally along the support frame. One row includes at least two elastic vibration isolation devices, and at least two of these devices have lateral limiting structures, forming a limiting row. Each column of elastic vibration isolation devices is arranged transversely along the support frame. One column includes at least two elastic vibration isolation devices, and at least two of these devices have longitudinal limiting structures, forming a limiting column. At least three elastic vibration isolation devices are provided with vertical limiting structures, or at least three vertical limiting devices are provided between the support frame and the bottom foundation.

[0007] When necessary, the elastic vibration isolation device located at the intersection of the limiting row and the limiting column is equipped with both longitudinal limiting structure and lateral limiting structure.

[0008] The specific structural forms of the longitudinal and lateral limiting structures described in this invention are diverse. Typically, both the longitudinal and lateral limiting structures include a limiting baffle and a limiting support. The limiting baffle is fixedly mounted on the upper housing of the elastic vibration isolation device, and the limiting support is fixedly mounted on the lower housing. A longitudinal movement space is provided between the limiting baffle and the limiting support in the longitudinal limiting structure, and a lateral movement space is provided between the limiting baffle and the limiting support in the lateral limiting structure. Based on the above principle, if necessary, the longitudinal and lateral limiting structures may also include an elastic buffer. The elastic buffer is fixed to the limiting baffle or the limiting support. The maximum compressive deformation of the elastic buffer during operation, or the sum of the maximum compressive deformation of the elastic buffer and the gap between the elastic buffer and the limiting baffle, or the sum of the maximum compressive deformation of the elastic buffer and the gap between the elastic buffer and the limiting support constitutes the longitudinal or lateral movement space. The setting of lateral and longitudinal movement spaces can be determined based on the following principles through simulation calculations, simulation tests, engineering experience values, and other technical measures: the lateral movement space is greater than the maximum lateral displacement between the upper and lower shells on the support platform when the object to be protected is working normally, and less than the maximum allowable lateral displacement between the upper and lower shells on the support platform when the displacement of the object to be protected and the pipeline remains within the allowable range under the condition of bottom foundation swaying; the longitudinal movement space is greater than the maximum longitudinal displacement between the upper and lower shells on the support platform when the object to be protected is working normally, and less than the maximum allowable longitudinal displacement between the upper and lower shells on the support platform when the displacement of the object to be protected and the pipeline remains within the allowable range under the condition of bottom foundation swaying.

[0009] Based on the above principles, as another typical structure, the longitudinal limiting structure of this invention may also include a buffer guide, which includes an elastic buffer and a guide plate. An adjusting screw and a locking nut are fixedly installed on the guide plate. One end of the buffer guide is connected and fixed to the limiting support through the adjusting screw and the locking nut, and the other end is connected to the limiting baffle through the elastic buffer. The maximum compression deformation of the elastic buffer during operation, or the sum of the maximum compression deformation of the elastic buffer during operation and the gap between the elastic buffer and the limiting baffle, constitutes the longitudinal movement space. Similarly, the lateral limiting structure may also include a buffer guide, which includes an elastic buffer and a guide plate. An adjusting screw and a locking nut are fixedly installed on the guide plate. One end of the buffer guide is connected and fixed to the limiting support through the adjusting screw and the locking nut, and the other end is connected to the limiting baffle through the elastic buffer. The maximum compression deformation of the elastic buffer during operation, or the sum of the maximum compression deformation of the elastic buffer during operation and the gap between the elastic buffer and the limiting baffle, constitutes the lateral movement space. Preferably, the elastic buffer in the longitudinal limiting structure and the transverse limiting structure is integrated with the guide plate.

[0010] The specific structural form of the vertical limiting structure in this invention can also be varied, for example: (1) The vertical limiting structure includes a connecting screw, an upper limit component, a lower limit component and a locking nut. The upper limit component includes an integrated upper limit member and an upper elastic buffer member. The lower limit component includes an integrated lower limit member and a lower elastic buffer member. The lower part of the connecting screw is fixedly connected to the lower housing or the bottom foundation. The upper limit member and the lower limit member are connected to the connecting screw through a threaded structure. The upper part of the connecting screw passes through the lower limit component, the upper housing and the upper limit component from bottom to top. In the static load state, there is a vertical movement space between the upper limit component and the upper housing and between the lower limit component and the upper housing. Typically, the threaded structure is a locking nut integrated on the upper limit member and the lower limit member respectively. (2) The vertical limiting structure includes a vertical limiting connecting screw and a locking nut. The vertical limiting connecting screw is connected to the upper housing and / or the lower housing through the locking nut. There is a vertical movement space between the locking nut and the upper housing and / or the lower housing. Of course, when necessary, the vertical limiting structure also includes an elastic buffer. The elastic buffer is disposed between the locking nut and the upper housing and / or the lower housing. The maximum compression deformation of the elastic buffer during operation, or the sum of the maximum compression deformation of the elastic buffer during operation and the gap between the elastic buffer and the upper housing, or the sum of the maximum compression deformation of the elastic buffer during operation and the gap between the elastic buffer and the lower housing constitutes the vertical movement space.

[0011] The anti-sway elastic vibration isolation system of this invention can also utilize a vertical limiting device to control the sway amplitude of the bearing platform. Typically, the vertical limiting device includes a limiting connecting screw and a locking nut. The lower part of the limiting connecting screw is fixedly connected to the bottom foundation, and the upper part of the limiting connecting screw is connected to the bearing platform through locking nuts respectively provided on both sides of the bearing platform. Vertical movement space is provided between the locking nuts and the bearing platform. Of course, the vertical limiting device may also include an elastic buffer, which is disposed between the locking nut and the bearing platform. The maximum compressive deformation of the elastic buffer during operation, or the sum of the maximum compressive deformation of the elastic buffer during operation and the gap between the elastic buffer and the bearing platform, constitutes the vertical movement space. The setting of the vertical movement space can be determined according to the following principles through technical measures such as simulation calculation, simulation test, and engineering experience values: the vertical movement space is greater than the maximum vertical displacement between the upper and lower shells of the bearing platform when the object to be protected is working normally, and less than the maximum vertical displacement between the upper and lower shells of the bearing platform when the displacement of the object to be protected and the pipeline is kept within the allowable range under the condition of bottom foundation shaking.

[0012] To improve system damping, the elastic vibration isolation device in this invention may further include a damping element disposed between the upper and lower shells; alternatively, the anti-sway elastic vibration isolation system of this invention may also include a damping element, which is connected in parallel with the elastic vibration isolation device between the support platform and the bottom foundation. The vertical vibration mode damping ratio and the sway mode damping ratio of the anti-sway elastic vibration isolation system are between 8% and 30%. The type of damping element can be varied, including viscous dampers, eddy current dampers, orifice throttling dampers, elastic rubber dampers, or elastic polyurethane dampers, etc. As long as the damping performance, service life, and working conditions meet the engineering requirements, they can all be applied in this invention. Furthermore, the elastic elements used in the elastic vibration isolation device of this invention's anti-sway elastic vibration isolation system can be diverse, including helical steel springs, metal disc springs, rubber elastomers, polyurethane elastomers, or metal-rubber composite elastomers, etc., which can be selected according to actual engineering needs in practice.

[0013] It should be noted that, in order to ensure that the deformation of the elastic vibration isolation devices caused by thermal expansion and contraction of the bearing platform is as uniform as possible, when there are more than two rows of elastic vibration isolation devices arranged transversely along the bearing platform, the limiting row should be placed close to the middle of the bearing platform. In addition, the row spacing between the two rows of elastic vibration isolation devices arranged longitudinally along the bearing platform should also be as large as possible to better improve the stability of the bearing platform.

[0014] This invention relates to an anti-sway elastic vibration isolation system. By orthogonally setting up limiting rows and columns, and adding lateral limiting structures to at least two elastic vibration isolation devices in the limiting rows, and longitudinal limiting structures to at least two elastic vibration isolation devices in the limiting columns, this system effectively controls the lateral and longitudinal displacements of the aforementioned elastic vibration isolation devices, thereby controlling the lateral and longitudinal displacements of the entire support frame. This ensures that when the foundation sways (due to wind, waves, or earthquakes), the swaying amplitude of the equipment and pipelines is controlled within an acceptable range, allowing for normal operation. Furthermore, it allows for the unimpeded release of thermal expansion and contraction of the support frame. For example, a 20-meter long and 10-meter wide steel support frame can generate a 12mm longitudinal displacement and a 6mm lateral displacement under a 50°C temperature difference. Through the orthogonal (perpendicular) setting of the limiting rows and columns, the longitudinal and lateral displacements of the support frame and foundation caused by thermal expansion and contraction can be released unimpeded while being limited in three directions. If the design is not orthogonal, the longitudinal and lateral limiting devices will conflict, and thermal expansion and contraction will cause the limiting contacts to jam, thus causing the system to lose its vibration isolation effect. Third, by setting at least three vertical limiting devices in the system or adding a vertical limiting structure to at least three elastic vibration isolation devices, the upward and downward amplitude of the bearing platform, which is fixed to the upper shell, can be effectively limited, thereby improving the anti-sway performance of the bearing platform. Fourth, the modal damping ratio of the elastic vibration isolation foundation (vibration isolation platform) of general ground-based rotary power equipment is between 5% and 10%. This invention reduces the swaying amplitude and vertical amplitude of the vibration isolation platform by maintaining a larger modal damping ratio (8%-30%) in the system.

[0015] Compared with traditional vibration isolation platforms, the implementation of the above comprehensive measures can ensure that the anti-sway elastic vibration isolation system of the present invention has the following beneficial technical effects: (1) Under normal working conditions, it is always elastically supported along the vertical direction of the bearing platform, and has good vibration isolation performance; (2) When the bearing platform is excited by the bottom foundation and produces large sway, the transverse limiting structure and the longitudinal limiting structure are used to achieve reliable limiting in the transverse and longitudinal directions of the bearing platform. The orthogonal setting of the limiting row and the limiting column enables effective control of the transverse and longitudinal displacement of the bearing platform, while the thermal expansion and contraction displacement of the bottom foundation and the bearing platform can be released without obstruction; (3) When the bearing platform is excited and produces large sway, the vertical limiting device or the vertical limiting structure is used to effectively control the sway amplitude of the bearing platform within the vertical movement space. When the sway amplitude is to be increased further, the vertical limiting device or the vertical limiting structure It will completely lock and firmly restrict the bearing platform. In this way, the swing and displacement of the equipment and pipelines on the bearing platform will be controlled within a limited range and will not be damaged; (4) It can provide elastic support at least four points for the bearing platform. Compared with the three-point support vibration isolation system abroad, it has more support points and the load of a single support point is relatively smaller. It can reduce the amount of steel used in the bearing platform and the bottom foundation. Taking the typical high-altitude platform in the engineering field - the offshore working platform as an example, the load strength requirement of the offshore working platform steel structure is lower, which is conducive to improving the stress conditions of the offshore working platform and also conducive to reducing the construction cost of the offshore working platform; (5) For the high-altitude platform steel structure of the same strength, since the bearing points in the anti-sway elastic vibration isolation system of this invention are more dispersed, it is conducive to placing equipment with larger size and weight, and improving the space utilization efficiency of the platform.

[0016] In summary, the anti-sway elastic vibration isolation system of this invention has good vibration isolation effect, strong anti-sway capability, high stability, and relatively more dispersed and uniform load distribution. It has low strength requirements for individual support points and can be widely used in vibration control engineering of offshore or onshore high-altitude platform supporting equipment such as offshore steel structure working platforms or wind power steel structure towers. It can also be applied to vibration isolation platforms on land where large swaying of equipment during earthquakes is not allowed, including but not limited to power equipment such as motors, compressors, fans, turbines, pumps, hydraulic pump stations, emergency generator sets, and air conditioning units, as well as precision equipment such as main control room and living area modules. Attached Figure Description

[0017] Figure 1 This is one of the working principle diagrams of the anti-sway elastic vibration isolation system of the present invention.

[0018] Figure 2 for Figure 1 A partial enlarged view of the elastic vibration isolation device C in the left view.

[0019] Figure 3 for Figure 1 A partial enlarged view of the elastic vibration isolation device C in the bottom view.

[0020] Figure 4 for Figure 1 A partial enlarged view of the elastic vibration isolation device D in the left view.

[0021] Figure 5 for Figure 1 A partial enlarged view of the elastic vibration isolation device D in the bottom view.

[0022] Figure 6 for Figure 1 A partial enlarged view of the elastic vibration isolation device A in the left view.

[0023] Figure 7 for Figure 1 A partial enlarged view of the elastic vibration isolation device A in the bottom view.

[0024] Figure 8 for Figure 1 A partial enlarged view of the elastic vibration isolation device B in the left view.

[0025] Figure 9 for Figure 1 A partial enlarged view of the elastic vibration isolation device B in the bottom view.

[0026] Figure 10 for Figure 1 One of the EE sectional views.

[0027] Figure 11 for Figure 7 One of the schematic diagrams of the longitudinal limiting structure at point F of the elastic vibration isolation device A

[0028] Figure 12 This is a schematic diagram of a typical lateral and longitudinal limiting structure in an elastic vibration isolation device.

[0029] Figure 13 for Figure 7 Schematic diagram of the longitudinal limiting structure at point F of the medium elastic vibration isolation device A (Part 2).

[0030] Figure 14 for Figure 7 Schematic diagram of the longitudinal limiting structure at point F of the medium elastic vibration isolation device A (Part 3).

[0031] Figure 15 This is the second schematic diagram of the working principle of the anti-sway elastic vibration isolation system of the present invention.

[0032] Figure 16 for Figure 15 A partial enlarged view of the elastic vibration isolation device C in the left view.

[0033] Figure 17 for Figure 15 A partial enlarged view of the elastic vibration isolation device C in the bottom view.

[0034] Figure 18 for Figure 15 A partial enlarged view of the elastic vibration isolation device D in the left view.

[0035] Figure 19 for Figure 15 A partial enlarged view of the elastic vibration isolation device A in the bottom view.

[0036] Figure 20 for Figure 15 A partial enlarged view of the elastic vibration isolation device B in the left view.

[0037] Figure 21 for Figure 15 A partial enlarged view of the elastic vibration isolation device B in the bottom view.

[0038] Figure 22 This is the third diagram illustrating the working principle of the anti-sway elastic vibration isolation system of the present invention.

[0039] Figure 23 This is the fourth diagram illustrating the working principle of the anti-sway elastic vibration isolation system of the present invention.

[0040] Figure 24 This is the fifth diagram illustrating the working principle of the anti-sway elastic vibration isolation system of the present invention.

[0041] Figure 25 This is the sixth diagram illustrating the working principle of the anti-sway elastic vibration isolation system of the present invention.

[0042] Figure 26 This is the seventh diagram illustrating the working principle of the anti-sway elastic vibration isolation system of the present invention.

[0043] Figure 27 This is the eighth diagram illustrating the working principle of the anti-sway elastic vibration isolation system of the present invention.

[0044] Figure 28 for Figure 1 The second enlarged view of the elastic vibration isolation device B in the left view.

[0045] Figure 29 for Figure 1 The second enlarged view of the elastic vibration isolation device B in the bottom view.

[0046] Figure 30 for Figure 1 The third enlarged view of the elastic vibration isolation device B in the bottom view.

[0047] Figure 31 for Figure 1 The second enlarged view of the elastic vibration isolation device C in the left view.

[0048] Figure 32 for Figure 1 The second enlarged view of the elastic vibration isolation device C in the bottom view.

[0049] Figure 33 for Figure 1 The third enlarged view of the elastic vibration isolation device C in the bottom view.

[0050] Figure 34 for Figure 1 The second sectional view of the EE.

[0051] Figure 35 for Figure 1 The third sectional view of the EE. Detailed Implementation

[0052] Example 1

[0053] like Figure 1 — Figure 11 The anti-sway elastic vibration isolation system of the present invention includes a support platform 1 and four elastic vibration isolation devices. The elastic vibration isolation devices are located between the support platform 1 and the bottom foundation 17, which is located on a marine steel structure platform. The longitudinal direction is the horizontal length direction of the support platform, the transverse direction is the horizontal width direction of the support platform, and the vertical direction is the direction perpendicular to the horizontal surface of the support platform. The elastic vibration isolation device includes an upper shell 4, an elastic element 11, and a lower shell 19. The elastic element 11 is located between the upper shell 4 and the lower shell 19. The elastic element 11 is made of polyurethane elastomer, specifically... The polyurethane microporous foamed elastic block has an upper shell 4 firmly connected to the support frame 1 via fasteners 18, and a lower shell 19 firmly welded to the bottom foundation 17. Four elastic vibration isolation devices are arranged orthogonally in two rows and two columns below the support frame 1. Two elastic vibration isolation devices in each row are arranged longitudinally along the support frame, with a lateral limiting structure in one row, forming a limiting row. Simultaneously, two elastic vibration isolation devices in each column are arranged transversely along the support frame, with a longitudinal limiting structure in one column, forming a limiting column. Specifically, as shown... Figure 1 As shown, lateral limiting structures 3 are respectively installed in elastic isolators C and D in the same row, and the row containing both constitutes the limiting row. Simultaneously, longitudinal limiting structures 2 are respectively installed in elastic isolators C and A in the same column, and the column containing both constitutes the limiting column. Elastic isolator C is located at the intersection of the limiting row and the limiting column, and it is equipped with both lateral limiting structures 3 and longitudinal limiting structures 2. Both the longitudinal limiting structure 2 and the lateral limiting structure 3 are composed of limiting baffles 5 and limiting supports 6. Specifically, as shown... Figure 2 and Figure 4As shown, in the lateral limiting structure 3, the limiting baffle 5 is fixedly mounted on the upper housing 4, and the limiting support 6 is fixedly mounted on the lower housing 19. The limiting support 6 is located outside the limiting baffle 5. A lateral movement space d is left between the limiting baffle 5 and the limiting support 6 in the lateral limiting structure 3. Similarly, as... Figure 3 and Figure 7 as well as Figure 11 As shown, in the longitudinal limiting structure 2, the limiting baffle 5 is fixedly mounted on the upper housing 4, and the limiting support 6 is fixedly mounted on the lower housing 19. The limiting support 6 is located outside the limiting baffle 5, and a longitudinal movement space h is left between the limiting baffle 5 and the limiting support 6 in the longitudinal limiting structure 2. Figure 4 and Figure 5 The arrangement of the lateral limiting structure 3 in the elastic vibration isolation device D can be clearly seen. Figure 6 and Figure 7 The arrangement of the longitudinal limiting structure 2 in the elastic vibration isolation device A can be clearly seen; in addition, as Figure 8 and Figure 9 As shown, since the elastic vibration isolator B is neither in the limiting row nor the limiting column, it has neither a lateral limiting structure nor a longitudinal limiting structure; in addition, as Figure 10 As shown, the anti-sway elastic vibration isolation system of the present invention also includes a vertical limiting device. There are four sets of vertical limiting devices, which are respectively set at the four corners of the bearing platform 1. The vertical limiting device includes a limiting connecting screw 22 and a locking nut 10. The lower part of the limiting connecting screw 22 is fixedly connected to the bottom foundation 17, and the upper part of the limiting connecting screw 22 is connected to the bearing platform 1 through the locking nuts 10 respectively set on both sides of the bearing platform 1. A vertical movement space v is provided between the locking nut 10 and the bearing platform 1.

[0054] It should be noted that in the technical solution described in this example, since the polyurethane microporous foam elastic block has both good elasticity and damping properties, it can be used as both an elastic element and a damping element. Through the damping provided by the polyurethane microporous foam elastic block, the vertical vibration mode damping ratio, lateral sway damping ratio, and longitudinal sway damping ratio of the anti-sway elastic vibration isolation system of this invention all reach 8%. Regarding the setting of the lateral movement space d and the longitudinal movement space h, they can be determined through simulation calculations, simulation tests, engineering experience values, and other technical measures according to the following principles: the lateral movement space d is greater than the distance between the upper and lower shells of the object to be protected on the support frame during normal operation. The maximum lateral displacement between the upper and lower shells on the support frame (generally within ±0.1mm) is less than the maximum allowable lateral displacement between the upper and lower shells on the support frame when the displacement of the protected object and pipeline remains within the allowable range under the condition of foundation sway (generally within ±2.0mm). The longitudinal movement space h is greater than the maximum longitudinal displacement between the upper and lower shells on the support frame when the protected object is working normally on the support frame (generally within ±1.0mm), and less than the maximum allowable longitudinal displacement between the upper and lower shells on the support frame when the displacement of the protected object and pipeline remains within the allowable range under the condition of foundation sway. Depending on the project requirements, the lateral movement space d and the longitudinal movement space h can be the same or different. In addition, the setting of the vertical movement space v can be determined by simulation calculation, simulation test, engineering experience value and other technical measures according to the following principles: the vertical movement space is greater than the maximum vertical displacement between the upper shell and the lower shell of the bearing platform when the object to be protected is working normally, and less than the maximum vertical displacement between the upper shell and the lower shell of the bearing platform when the displacement of the object to be protected and the pipeline is kept within the allowable range under the condition of bottom foundation shaking.

[0055] This invention relates to an anti-sway elastic vibration isolation system. By orthogonally setting up limit rows and columns, and adding lateral limit structures to the elastic vibration isolation devices in the limit rows, and longitudinal limit structures to the elastic vibration isolation devices in the limit columns, this system effectively controls the lateral and longitudinal displacements of the aforementioned elastic vibration isolation devices, thereby controlling the lateral and longitudinal displacements of the entire support frame. This ensures that when the foundation sways (due to wind, waves, wind vibration, or earthquakes), the swaying amplitude of the equipment and pipelines is controlled within an allowable range, allowing for normal operation. Furthermore, the orthogonal setting of the limit rows and columns allows for the unimpeded release of thermal expansion and contraction of the support frame. For example, a 20-meter long and 10-meter wide steel support frame can generate a 12mm longitudinal displacement and a 6mm lateral displacement under a 50°C temperature difference. Through the orthogonal (perpendicular) setting of the limit rows and columns, the longitudinal and lateral displacements of the support frame and foundation caused by thermal expansion and contraction are released unimpeded while being limited in three directions. If the design is not orthogonal, the longitudinal and lateral limiting devices will conflict, and thermal expansion and contraction will cause the limiting contacts to jam, thus causing the system to lose its vibration isolation effect. Third, by setting four vertical limiting devices in the system, the upward and downward amplitude of the bearing platform, which is fixed to the upper shell, can be effectively limited, thereby improving the anti-sway performance of the bearing platform. Fourth, the modal damping ratio of the elastic vibration isolation foundation (vibration isolation platform) of the ground-based rotary power equipment is generally between 5% and 10%. This invention reduces the swaying amplitude and vertical amplitude of the vibration isolation platform by maintaining a larger modal damping ratio (8%-30%) in the system. Of course, this example uses a system modal damping ratio of 8% for illustration. In actual engineering, by using high-performance damping elements and increasing the number of damping elements, the system modal damping ratio can be set to 30%. The specific design should be based on the engineering needs. If necessary, special damping elements can even be added between the bearing platform and the bottom foundation, such as viscous dampers, eddy current dampers, orifice throttling dampers, elastic rubber dampers, or elastic polyurethane dampers. As long as the damping performance, service life, and working conditions meet the engineering needs, they can all be applied to this invention.

[0056] Compared with traditional vibration isolation platforms, the implementation of the above comprehensive measures can ensure that the anti-sway elastic vibration isolation system of the present invention has the following beneficial technical effects: (1) Under normal working conditions, it is always elastically supported along the vertical direction of the bearing platform, and has good vibration isolation performance; (2) When the bearing platform is excited by the bottom foundation and produces large sway, the transverse limiting structure and the longitudinal limiting structure are used to achieve reliable limiting in the transverse and longitudinal directions of the bearing platform. The orthogonal setting of the limiting row and the limiting column enables effective control of the transverse and longitudinal displacement of the bearing platform, while the thermal expansion and contraction displacement of the bottom foundation and the bearing platform can be released without obstruction; (3) When the bearing platform is excited and produces large sway, the vertical limiting device is used to ensure that the sway amplitude of the bearing platform is always effectively controlled within the vertical movement space. When the sway amplitude is to be increased further, the vertical limiting device or the vertical limiting structure will completely stop the sway. (3) By locking and firmly restricting the bearing platform, the swing and displacement of the equipment and pipelines on the bearing platform are controlled within a limited range and will not be damaged; (4) It can provide elastic support at least four points for the bearing platform. Compared with the three-point support vibration isolation system abroad, it has more support points and the load of a single support point is relatively smaller, which can reduce the amount of steel used in the bearing platform and the bottom foundation. Taking the typical high-altitude platform in the engineering field - the offshore working platform as an example, the load strength requirement of the offshore working platform steel structure is lower, which is conducive to improving the stress conditions of the offshore working platform and also conducive to reducing the construction cost of the offshore working platform; (5) For the high-altitude platform steel structure of the same strength, since the bearing points in the anti-sway elastic vibration isolation system of this invention are more dispersed, it is conducive to placing equipment with larger size and weight, and improving the space utilization efficiency of the platform.

[0057] In summary, the anti-sway elastic vibration isolation system of this invention has good vibration isolation effect, strong anti-sway capability, high stability, and relatively more dispersed and uniform load distribution. It has low strength requirements for individual support points and can be widely used in vibration control engineering of offshore or onshore high-altitude platform supporting equipment such as offshore steel structure working platforms or wind power steel structure towers. It can also be applied to vibration isolation platforms on land where large swaying of equipment during earthquakes is not allowed, including but not limited to power equipment such as motors, compressors, fans, turbines, pumps, hydraulic pump stations, emergency generator sets, and air conditioning units, as well as precision equipment such as main control room and living area modules.

[0058] It should be noted that, firstly, this example uses polyurethane elastomer as the elastic element. In practical applications, other types of products such as helical steel springs, metal disc springs, rubber elastomers, or metal-rubber composite elastomers can also be used as elastic elements, and the design can be selected according to engineering needs. Secondly, based on the technical principles of this invention, the specific forms of the longitudinal and lateral limiting structures in the elastic vibration isolation device of the anti-sway elastic vibration isolation system of this invention can be varied. In addition to the plate-type limiting baffles and limiting supports already mentioned, such as... Figure 12 As shown, the limiting baffle 5 and the limiting support 6 can also adopt a cylindrical structure, and the elastic element 11 can also adopt a spiral steel spring. The gaps left between the limiting baffle 5 and the limiting support 6 in the transverse and longitudinal directions of the bearing platform are the transverse movement space d and the longitudinal movement space h. According to engineering needs, the dimensions of the transverse movement space d and the longitudinal movement space h can be the same or different. Third, in addition to using fasteners to fix the upper shell and the bearing platform, they can also be fixedly connected by welding or other methods. Similarly, in addition to welding, the lower shell and the bottom foundation can also be fixedly connected by fasteners or other methods. Fourth, this example uses the setting of four vertical limiting devices as an example. In practice, at least three vertical limiting devices should be set according to the size of the bearing platform and the load-bearing situation. Of course, five, six or even more vertical limiting devices can also be set to ensure the anti-overturning of the bearing platform. These are all simple variations based on the technical principle of this invention. They are only described in words here and are not shown in the drawings. They are all within the protection scope claimed by this invention.

[0059] Example 2

[0060] like Figure 13 The anti-sway elastic vibration isolation system of the present invention differs from that of Embodiment 1 in that the longitudinal limiting structure of the elastic vibration isolation device also includes an elastic buffer 8 made of rubber elastomer. The elastic buffer 8 is vulcanized and fixed together with the limiting support 6, and a gap h' is left between the elastic buffer 8 and the limiting baffle 5.

[0061] Of course, based on the above technical principles, in the longitudinal limiting structure, the elastic buffer can also be fixedly installed on the limiting baffle; in addition, in the transverse limiting structure of the elastic vibration isolation device, the elastic buffer can also be fixedly installed on the limiting baffle or the limiting support. These are all simple variations based on the technical principles of this invention and are all within the protection scope claimed by this invention.

[0062] Compared with Embodiment 1, in the technical solution described in this example, due to the addition of an elastic buffer, when the support platform swings, the limiting baffle will not directly contact or collide with the limiting support. The impact of the limiting baffle will be buffered by the elastic buffer first, and then act on the limiting support. This can effectively reduce impact noise, protect the limiting baffle and the limiting support structure from damage, and help improve the service life of the system.

[0063] It should be pointed out that, Figure 13 In this type of technical solution, since the elastic buffer can be compressed during operation, the actual longitudinal movement space should be the sum of the gap h' between the elastic buffer 8 and the limiting baffle 5 and the maximum compression deformation of the elastic buffer 8 during operation. Therefore, attention should be paid to this in the design and calculation. The gap h' should not be regarded as the entire longitudinal movement space. In addition, the influence of the stiffness of the elastic buffer on the natural frequency of the vibration isolation system should also be considered. Similarly, for the lateral limiting structure with added elastic buffer, the design and calculation of the lateral movement space should also be given the same consideration.

[0064] based on Figure 13 Technical principles, such as Figure 14 As shown, the longitudinal limiting structure of the elastic vibration isolation device also includes an elastic buffer 8. One side of the elastic buffer 8 is vulcanized and fixed to the limiting baffle 5, and the other side abuts against the surface of the limiting support. Figure 13 Compared with the technical solutions shown, Figure 14 In the technical solution shown, since the elastic buffer 8 fills the gap between the limiting baffle 5 and the limiting support 6, it can effectively prevent foreign objects from falling into the gap, making it safer and more reliable. It should be particularly noted that in this longitudinal limiting structure, although there is no pre-reserved gap between the limiting baffle and the limiting support, the elastic buffer is compressible. Therefore, the maximum compressive deformation of the elastic buffer during operation is the longitudinal movement space h of the longitudinal limiting structure. Of course, this arrangement of the elastic buffer can also be used in the transverse limiting structure, in which case the maximum compression of the elastic buffer during operation is the transverse movement space d of the transverse limiting structure. These are simple variations based on the technical principles of this invention, and are only described in words here without accompanying drawings, all of which are within the scope of protection claimed by this invention. The maximum compression deformation of the elastic buffer 8 during operation is repeatedly emphasized in this invention because in some projects, the elastic buffer is pre-compressed during installation. In this case, the pre-compression deformation of the elastic buffer should not be included in the longitudinal, lateral, or vertical movement space. This should be taken into consideration during design and calculation. This characteristic is applicable to all technical solutions of this invention that include elastic buffers in longitudinal, lateral, vertical, or vertical limiting structures or devices, and is explained here together.

[0065] Example 3

[0066] like Figures 15-21 The anti-sway elastic vibration isolation system of the present invention differs from that of Embodiment 2 in that vertical limiting structures are provided in elastic vibration isolation devices A, B, C, and D; the elastic element 11 consists of multiple helical steel springs disposed between the upper housing 4 and the lower housing 19; as shown in the figure. Figure 16 As shown, in the elastic vibration isolation device C located in the limiting row, the lateral limiting structure includes a limiting baffle 5, a buffer guide, and a limiting support 6. The limiting baffle 5 is fixedly installed on the upper housing 4 of the elastic vibration isolation device C, and the limiting support 6 is fixedly installed on the lower housing 19. The buffer guide includes an integrated elastic buffer 8 and a guide plate 7. An adjusting screw 9 and a locking nut 10 are fixedly installed on the guide plate 7. One end of the buffer guide is connected and fixed to the limiting support 6 through the adjusting screw 9 and the locking nut 10, and the other end is connected to the limiting baffle 5 through the elastic buffer 8. The maximum compression deformation of the elastic buffer during operation constitutes the lateral movement space; as Figure 16 As shown, the vertical limiting structure in the elastic vibration isolation device C includes a vertical limiting connecting screw 12, an upper limiting assembly, a lower limiting assembly, and a locking nut 10. The upper limiting assembly includes an integrated upper limiting member 14 and an upper elastic buffer member 13. The lower limiting assembly includes an integrated lower limiting member 15 and a lower elastic buffer member 16. The lower part of the vertical limiting connecting screw 12 is connected to the lower housing 19 by a threaded structure and fixed by a locking nut. The upper limiting member 14 and the lower limiting member 15 are connected to the vertical limiting connecting screw 12 by a threaded structure. The threaded structure consists of locking nuts 10 that are welded to the upper limiting member 14 and the lower limiting member 15. The upper part of the vertical limiting connecting screw 12 passes through the lower limiting assembly, the upper housing 4, and the upper limiting assembly from bottom to top. In the static load state, the upper limiting assembly and the upper housing... A gap v' is left between 4 and between the lower limit component and the upper housing 4. That is, under normal working conditions, during the elastic deformation of the elastic element 11 caused by the vibration of the equipment above the isolation support platform, due to the gap v' in the system, there is no contact or collision between the upper limit component and the upper housing 4, nor between the lower limit component and the upper housing 4, and there will be no adverse effect on the vibration isolation performance. Among them, the sum of the maximum compressive deformation of the upper elastic buffer 13 during operation and the gap v' between the upper limit component and the upper housing 4 constitutes the vertical movement space of the vertical limiting structure on the side above the mating part of the upper housing. The sum of the maximum compressive deformation of the lower elastic buffer 16 during operation and the gap v' between the lower limit component and the upper housing 4 constitutes the vertical movement space of the vertical limiting structure on the side below the mating part of the upper housing. Figure 17As shown, the longitudinal limiting structure in the elastic vibration isolation device C includes a limiting baffle 5, a buffer guide, and a limiting support 6. The limiting baffle 5 is fixedly installed on the upper housing 4 of the elastic vibration isolation device, and the limiting support 6 is fixedly installed on the lower housing 19. The buffer guide includes an integrated elastic buffer 8 and a guide plate 7. An adjusting screw 9 and a locking nut 10 are fixedly installed on the guide plate 7. One end of the buffer guide is connected and fixed to the limiting support 6 through the adjusting screw 9 and the locking nut 10, and the other end is connected to the limiting baffle 5 through the elastic buffer 8. The maximum compression deformation of the elastic buffer during operation constitutes the longitudinal movement space. Figure 17 As shown, in the elastic vibration isolation device C, two sets of vertical limiting structures are also provided between the limiting baffles 5. The specific form of the vertical limiting structures is similar to... Figure 16 The basic principles are the same as those in the previous section, and will not be repeated here. Furthermore, to improve system damping, the elastic vibration isolation device in this invention also includes a damping element 20, which is disposed between the upper housing 4 and the lower housing 19. Specifically, the damping element 20 is a viscous damper. Using the viscous damper, the vertical vibration mode damping ratio, lateral sway damping ratio, and longitudinal sway damping ratio of the system reach 30%. Based on the above description, as... Figure 18 As shown, the elastic vibration isolation device D only has lateral limiting structures and vertical limiting structures; as Figure 19 As shown, the elastic vibration isolation device A only has longitudinal and vertical limiting structures; as Figure 20 and Figure 21 As shown, the elastic vibration isolation device B only has a vertical limiting structure.

[0067] Compared with Embodiment 1, the anti-sway elastic vibration isolation system of the present invention described in this example has added buffer guides to the longitudinal and lateral limiting structures, so the longitudinal and lateral movement spaces can be adjusted on-site according to actual needs, which is very convenient.

[0068] The anti-sway elastic vibration isolation system of the present invention described in this example, through the orthogonal arrangement of limit rows and limit columns, and the addition of lateral limit structures in at least two elastic vibration isolation devices in the limit rows, and longitudinal limit structures in at least two elastic vibration isolation devices in the limit columns, achieves the technical effect of effectively controlling the lateral and longitudinal displacements of the aforementioned elastic vibration isolation devices, thereby controlling the lateral and longitudinal displacements of the entire bearing platform. This ensures that when the equipment's foundation sways (due to wind waves, wind vibrations, earthquakes), the swaying amplitude of the equipment and pipelines is controlled within an allowable range, allowing for normal operation. On the other hand, it can unimpededly release the thermal expansion and contraction of the bearing platform. Taking a 20-meter-long and 10-meter-wide steel bearing platform as an example, under a temperature difference of 50°C, it can generate a longitudinal displacement of 12mm and a lateral displacement of 6mm. Through the orthogonal (perpendicular) arrangement of the limit rows and limit columns, the longitudinal and lateral displacements of the bearing platform and the foundation caused by thermal expansion and contraction can be released unimpeded while being limited in three directions. If the design is not orthogonal, the longitudinal and lateral limiting mechanisms will conflict, and thermal expansion and contraction will cause the limiting contacts to jam, thus rendering the system ineffective in vibration isolation. Third, by adding vertical limiting structures to the four elastic vibration isolation devices in the system, the upward and downward tilting of the support platform, which is rigidly connected to the upper shell, can be effectively limited, thereby improving the anti-sway performance of the support platform. Figure 10 Compared to the vertical limiting device in the previous version, each elastic vibration isolation device is equipped with a vertical limiting structure, which allows for quick and individual installation and replacement of a single elastic vibration isolation device, making it more convenient to use. Fourth, the modal damping ratio of elastic vibration isolation foundations (vibration isolation platforms) for ground-based rotary power equipment is generally between 5% and 10%. This invention, by maintaining a modal damping ratio of 30% in the system, can effectively reduce the swaying amplitude and vertical amplitude of the vibration isolation platform. In practice, the modal damping ratio of the system can be controlled within the range of 8% to 30% according to engineering needs.

[0069] Compared with traditional vibration isolation platforms, the implementation of the above comprehensive measures can ensure that the anti-sway elastic vibration isolation system of the present invention has the following beneficial technical effects: (1) Under normal working conditions, it is always elastically supported along the vertical direction of the bearing platform, and has good vibration isolation performance; (2) When the bearing platform is excited by the bottom foundation and produces large sway, the transverse limiting structure and the longitudinal limiting structure are used to achieve reliable limiting in the transverse and longitudinal directions of the bearing platform. The orthogonal setting of the limiting row and the limiting column enables effective control of the transverse and longitudinal displacement of the bearing platform, while the thermal expansion and contraction displacement of the bottom foundation and the bearing platform can be released without obstruction; (3) When the bearing platform is excited and produces large sway, the vertical limiting structure set in the elastic vibration isolation device is used to effectively control the sway amplitude of the bearing platform within the vertical movement space. When the sway amplitude is to be increased further, the vertical limiting device or the vertical limiting structure The structure will be completely stuck, firmly restricting the bearing platform. In this way, the swing and displacement of the equipment and pipelines on the bearing platform will be controlled within a limited range and will not be damaged; (4) It can provide elastic support for the bearing platform at least four points. Compared with the foreign three-point support vibration isolation system, it has more support points and the load of a single support point is relatively smaller. It can reduce the amount of steel used in the bearing platform and the bottom foundation. Taking the typical high-altitude platform in the engineering field - the offshore working platform as an example, the load strength requirement of the offshore working platform steel structure is lower, which is conducive to improving the stress conditions of the offshore working platform and also conducive to reducing the construction cost of the offshore working platform; (5) For the high-altitude platform steel structure of the same strength, since the bearing points in the anti-sway elastic vibration isolation system of this invention are more dispersed, it is conducive to placing equipment with larger size and weight, and improving the space utilization efficiency of the platform.

[0070] In summary, the anti-sway elastic vibration isolation system of this invention offers excellent vibration isolation, strong anti-sway capability, high stability, and a more dispersed and uniform load distribution. It also has lower strength requirements for individual support points. It can be widely applied to vibration control engineering for offshore steel structure work platforms or wind turbine steel structure towers and other offshore or onshore high-altitude platform equipment. It can also be applied to vibration isolation platforms on land where significant swaying of equipment during earthquakes is unacceptable, including but not limited to power equipment such as motors, compressors, fans, turbines, pumps, hydraulic pump stations, emergency generator sets, and air conditioning units, as well as precision equipment such as main control rooms and living quarters. For building-type protected objects such as main control rooms or living quarters, the building's foundation slab constitutes the aforementioned load-bearing frame. Utilizing the anti-sway elastic vibration isolation system of this invention can effectively solve the problem of preventing overturning of these building-type protected objects during earthquakes, which is one of the beneficial technical effects of this invention.

[0071] It should be noted that, firstly, the elastic buffer and guide plate in the longitudinal and lateral limiting structures described in this example are both integrated into a single structure. This is mainly designed to improve overall integrity, simplify installation, and enhance safety and reliability. In practical applications, for ease of maintenance and replacement, the elastic buffer and guide plate can also be detachable, for example, using fasteners, magnetic attraction, or convex-concave structure cooperation, etc., as long as it effectively prevents accidental detachment during operation, it is also applicable to this invention. Secondly, this example uses a helical steel spring as the elastic element. In practical applications, the elastic element can also be other types of products such as metal disc springs, rubber elastomers, polyurethane elastomers, or metal-rubber composite elastomers, which can be selected according to engineering needs. Furthermore, the damping element in the anti-sway elastic vibration isolation system of this invention can be diverse. On the one hand, in the damping element... Regarding the type of damping element, in addition to the viscous damper already mentioned, other types of damping devices such as eddy current dampers, orifice throttling dampers, elastic rubber dampers, or elastic polyurethane dampers can also be used in this invention, as long as the damping performance, service life, and working conditions meet the engineering requirements. On the other hand, regarding the installation position of the damping element, besides placing the damping element in the elastic vibration isolation device, the damping element can also be connected in parallel with the elastic vibration isolation device between the bearing platform and the bottom foundation, which also achieves good technical results. Of course, for some elastic elements with good damping performance, such as some rubber elastomers or polyurethane elastomers, which combine good damping performance and elasticity, they can also be used as both damping elements and elastic elements. Third, the number of vertical limiting structures in the elastic vibration isolation device needs to be designed according to the actual engineering requirements. Fourth, according to... Figures 15-21 The technical principles described herein are illustrated in this example, which uses the installation of vertical limiting devices in all four elastic vibration isolation devices. To ensure safety, the anti-sway elastic vibration isolation system of this invention should have vertical limiting structures in at least three of the elastic vibration isolation devices. In practical applications, when there are four or more elastic vibration isolation devices, vertical limiting structures can also be installed in five, six, or even more elastic vibration isolation devices to ensure the anti-tipping of the support platform. These are all simple variations based on the technical principles of this invention, and are described in text only without accompanying drawings, all of which are within the scope of protection claimed by this invention.

[0072] Example 4

[0073] like Figure 22The anti-sway elastic vibration isolation system of the present invention differs from that of Embodiment 3 in that it includes a support frame 1 and six elastic vibration isolation devices. The six elastic vibration isolation devices are arranged in two rows and three columns. The side containing two elastic vibration isolation devices D and one elastic vibration isolation device A is a limiting row, and the column containing the two elastic vibration isolation devices A located below the middle of the support frame 1 is a limiting column. In the limiting row, only the two elastic vibration isolation devices D are provided with a transverse limiting structure 3. In the limiting column, the two elastic vibration isolation devices A are provided with a longitudinal limiting structure 2. Vertical limiting structures are provided only in the elastic vibration isolation devices corresponding to the four corners of the support frame 1.

[0074] Compared to Embodiment 3, in the technical solution described in this example, the two elastic vibration isolation devices D in the limiting row only have a lateral limiting structure 3 and a vertical limiting structure, the two elastic vibration isolation devices A in the limiting column only have a longitudinal limiting structure 2, and the other two elastic vibration isolation devices B only have a vertical limiting structure. Relatively speaking, there are fewer types of elastic vibration isolation devices, and the structure is simpler. In addition, since six elastic vibration isolation devices are set to support the bearing platform, there are more support points in operation compared to the three-point support vibration isolation system abroad, which is conducive to improving the stability of the system. Furthermore, since the actual load-bearing capacity of a single support point is relatively smaller, the amount of steel used in the bearing platform and the bottom foundation can be reduced. Taking the typical high-altitude platform in the engineering field—the offshore working platform—as an example, the load-bearing strength requirements of the offshore working platform steel structure are lower, which is conducive to improving the stress conditions of the offshore working platform and also conducive to reducing the construction cost of the offshore working platform.

[0075] It should be noted that, in order to ensure that the deformation of the elastic vibration isolation devices caused by thermal expansion and contraction of the support frame is as uniform as possible, when there are more than two rows of elastic vibration isolation devices arranged transversely along the support frame, the limiting row should be located close to the middle of the support frame. Furthermore, the row spacing between the two rows of elastic vibration isolation devices arranged longitudinally along the support frame should also be as large as possible to better improve the stability of the support frame. Of course, based on the technical principles of Embodiment 3 and this example, to further improve the reliability of the limiting, it is also possible to... Figure 23 As shown, the elastic vibration isolation device at the intersection of the limiting row and the limiting column is specifically an elastic vibration isolation device C. The elastic vibration isolation device C simultaneously incorporates a longitudinal limiting structure 2 and a transverse limiting structure 3, which also achieves a good technical effect. These are all simple variations based on the technical principles of this invention and are within the scope of protection claimed by this invention.

[0076] Furthermore, it should be noted that, based on the technical principles of this example, Figure 22 and Figure 23In the above embodiments, the row containing the elastic vibration isolation device on the lower side of the longitudinal direction of the bearing platform in the figure is selected as the limiting row. In practice, the row containing the upper side of the longitudinal direction of the bearing platform can also be set as the limiting row. It is only necessary to set the transverse limiting structure 3 in the corresponding elastic vibration isolation device of the limiting row to achieve the same technical effect. This feature is also applicable to other embodiments of the present invention. It is only described in words here and will not be described in the accompanying drawings. It is also within the scope of protection claimed by the present invention.

[0077] Example 5

[0078] like Figure 24 The anti-sway elastic vibration isolation system of the present invention differs from that of Embodiment 4 in that it includes a support frame 1 and eight elastic vibration isolation devices. The eight elastic vibration isolation devices are arranged in two rows and four columns. The row containing two elastic vibration isolation devices D, one elastic vibration isolation device B, and one elastic vibration isolation device A is a limiting row. The column containing two elastic vibration isolation devices A located on the lower left side of the middle of the support frame 1 is a limiting column. In the limiting row, only the two elastic vibration isolation devices D are provided with a transverse limiting structure 3. In the limiting column, the two elastic vibration isolation devices A are provided with a longitudinal limiting structure 2. The other six elastic vibration isolation devices besides the elastic vibration isolation devices A are all provided with a vertical limiting structure.

[0079] Based on the technical principles of this example, the arrangement of the elastic vibration isolation devices in the anti-sway elastic vibration isolation system of this invention can also be two rows and five columns, or even two rows and more columns, with a corresponding number of elastic vibration isolation devices of ten or more. In practice, the design can be tailored to engineering needs. Furthermore, at least two elastic vibration isolation devices in the limiting row should have lateral limiting structures. Alternatively, lateral limiting structures can be set in three or four elastic vibration isolation devices in the limiting row. In this example, we will use the example of setting vertical limiting structures in all six elastic vibration isolation devices other than elastic vibration isolation device A. It should be noted that in the anti-sway elastic vibration isolation system of this invention, at least three elastic vibration isolation devices should have vertical limiting structures to ensure that the overturning amplitude of the bearing platform is effectively limited when swaying occurs, preventing overturning hazards. Three-point limiting of the bearing platform is only the minimum standard. Figure 24 In the technical solution shown, which involves a large bearing platform and a large number of elastic vibration isolation devices, vertical limiting structures should be installed in more of the elastic vibration isolation devices to ensure safety. Specifically, the design can be determined based on key parameters such as the size of the bearing platform and the weight distribution of the object to be protected. For harsh application conditions such as offshore platforms, it is preferable to install vertical limiting structures in all elastic vibration isolation devices, which can also achieve good technical results. These are all simple variations based on the technical principles of this invention and are within the scope of protection required by this invention.

[0080] Example 6

[0081] In the technical solutions shown in Embodiments 1 to 5, the shape of the support platform is a relatively regular rectangle, and the arrangement of the elastic vibration isolation devices along the longitudinal and transverse directions of the support platform is also relatively regular, with rows and columns corresponding neatly. However, in practical applications, due to the large variation in the width of the object to be protected fixed above the support platform or the large differences in the dimensions of the linked equipment, sometimes the widths of the left and right parts of the support platform differ to a certain extent. For example, as... Figure 25 The anti-sway elastic vibration isolation system of the present invention differs from that of Embodiment 5 in that the supporting platform 1 comprises two integrally formed parts with different widths and heights. Correspondingly, three rows of elastic vibration isolation devices are arranged longitudinally below the supporting platform 1, and five rows of elastic vibration isolation devices are arranged transversely below the supporting platform 1. Figure 25 The middle bearing platform 1, located at the bottom of the diagram, contains the row with the most elastic vibration isolation devices and is designated as the limiting row. Among the five rows of elastic vibration isolation devices arranged laterally on the bearing platform, the middle row is designated as the limiting row. At the intersection of the limiting row and the limiting column is an elastic vibration isolation device C that is equipped with both a lateral limiting structure 3 and a longitudinal limiting structure 2. The limiting row also includes two other elastic vibration isolation devices D that are equipped with a lateral limiting structure 3. The limiting column also includes another elastic vibration isolation device A that is equipped with a longitudinal limiting structure 2. The remaining positions use elastic vibration isolation devices B that are equipped with only a vertical limiting structure. Of course, all elastic vibration isolation devices A, C, and D are equipped with a vertical limiting structure.

[0082] In the technical solution described in this example, by adjusting the shape of the bearing platform and the arrangement of the elastic vibration isolators according to the different equipment sizes, it can better adapt to the equipment layout requirements, which is conducive to optimizing the structural scheme of the bearing platform and improving system stability.

[0083] Of course, based on the technical principles described above, the shape of the support frame can vary greatly depending on the equipment. Furthermore, to address the needs of equipment with different weight distributions, the arrangement of the elastic vibration isolation device can also be diverse, for example… Figure 26 The anti-sway elastic vibration isolation system of the present invention, as shown, comprises a support frame 1 consisting of two integrated parts of different widths but the same height. In the transverse direction of the support frame 1, the elastic vibration isolation devices are arranged in five rows, and in the longitudinal direction, they are arranged in five columns. For technical solutions with a large number of rows and columns of such elastic vibration isolation devices, the selection principle for the limiting rows and columns is preferably to choose the row with the largest number of elastic vibration isolation devices as the limiting row and the column with the largest number of elastic vibration isolation devices as the limiting column. For example... Figure 26In this design, the row of three elastic vibration isolation devices on the lower side of the support platform 1 is selected as the limiting row. All three elastic vibration isolation devices in this row are elastic vibration isolation devices D with a lateral limiting structure 3. Among the five rows of elastic vibration isolation devices arranged laterally on the support platform, the row with three elastic vibration isolation devices on the far right is designated as the limiting row. The three elastic vibration isolation devices A in this limiting row have a longitudinal limiting structure 2, while the remaining positions use elastic vibration isolation devices B with only a vertical limiting structure. Of course, all elastic vibration isolation devices A, B, C, and D have a vertical limiting structure. Alternatively, rows and columns with larger and more numerous elastic vibration isolation devices can be selected as limiting rows and columns. This type of structure also achieves good technical results with the anti-sway elastic vibration isolation system of this invention. In practice, it can be designed and selected according to the actual needs of the project and is within the scope of protection claimed by this invention.

[0084] Example 7

[0085] like Figure 27 The anti-sway elastic vibration isolation system of the present invention differs from that of Embodiment Six in that the support frame 1 is composed of three parts of different widths. Six rows of elastic vibration isolation devices are arranged laterally on the support frame, and six columns of elastic vibration isolation devices are arranged longitudinally on the support frame. Among the six columns of elastic vibration isolation devices arranged longitudinally on the support frame, the column located on the right side of the middle section serves as a limiting column. The two elastic vibration isolation devices in the limiting column are provided with longitudinal limiting structures 2. Figure 27 The middle of the bearing platform 1, located on the lower side of the diagram, is a limiting row. Two elastic vibration isolation devices in the limiting row are equipped with lateral limiting structures 3. The elastic vibration isolation device located at the intersection of the limiting column and the limiting row is equipped with both longitudinal limiting structures 2 and lateral limiting structures 3. The remaining elastic vibration isolation devices in the limiting row are elastic vibration isolation devices D with lateral limiting structures 3. The remaining elastic vibration isolation devices in the limiting column are elastic vibration isolation devices A with longitudinal limiting structures 2. Elastic vibration isolation devices B with only vertical limiting structures are used in other positions. Vertical limiting structures are provided in all elastic vibration isolation devices A, C, and D.

[0086] Example 8

[0087] To facilitate the individual installation and maintenance of each elastic vibration isolation device, a vertical limiting structure can be added to all elastic vibration isolation devices to restrict the vertical displacement between the upper and lower shells. This gives the elastic vibration isolation devices good tensile strength, allowing them to replace the vertical limiting device and prevent excessive deflection or even overturning of the bearing platform. Figure 28 and Figure 29The anti-sway elastic vibration isolation system of the present invention, taking the vertical limiting structure in the elastic vibration isolation device B as an example, differs from Embodiment 1 in that the vertical limiting structure includes a vertical limiting connecting screw 12 and a locking nut 10. The vertical limiting connecting screw 12 is fixedly connected to the lower housing 19, and the vertical limiting connecting screw 12 is connected to the upper housing 4 through the locking nut 10. A vertical movement space v is provided between the upper and lower surfaces of the locking nut 10 and the upper housing 4. The elastic element 11 is specifically made of rubber elastomer. Through the damping provided by the rubber elastomer, the vertical vibration mode damping ratio, lateral sway damping ratio, and longitudinal sway damping ratio of the anti-sway elastic vibration isolation system of the present invention all reach 9%.

[0088] By incorporating the aforementioned vertical limiting structure into all elastic vibration isolation devices, the elastic vibration isolation devices acquire excellent tensile strength, thus replacing the vertical limiting devices and preventing excessive deflection or even overturning of the bearing platform.

[0089] certainly Figure 28 and Figure 29 In this design, the lower housing of the elastic vibration isolation device adopts a plate structure, while the upper housing adopts a box structure. In practical applications, the upper housing can also be a plate structure, and the lower housing a box structure; simply flip the elastic vibration isolation device over for use. Furthermore, as... Figure 30 As shown, with Figure 29 The difference in the technical solution shown is that the vertical limiting connecting screw 12 and the lower housing 19 are connected by a detachable threaded structure. The vertical limiting structure may also include an elastic buffer 8, which is disposed between the locking nut 10 and the upper housing 4. The maximum compressive deformation of the elastic buffer 8 during operation is the vertical movement space v. Due to the addition of the elastic buffer, the tensile deformation of the upper housing can be effectively controlled and the upper housing can be quickly reset after being stretched, thereby effectively preventing the elastic element from shifting, jumping, or even tipping over. These are simple changes based on the technical principle of this example, which can also achieve good technical effects and are within the scope of protection claimed by this invention.

[0090] Example 9

[0091] like Figure 31 and Figure 32The anti-sway elastic vibration isolation system of the present invention differs from that of Embodiment 8 in that, in the elastic vibration isolation device C, the lower housing 19 also adopts a box structure. Furthermore, the limiting baffles 5 in the lateral and longitudinal limiting structures are located outside the limiting supports 6. Additionally, the vertical limiting structure includes an elastic buffer 8. The vertical limiting connecting screw 12 is fixedly connected to the bottom foundation 17. The vertical limiting connecting screw 12 is connected to the upper housing 4 and the lower housing 19 respectively via locking nuts 10. The elastic buffer 8 is specifically a rubber elastomer. The elastomers are positioned between the locking nut 10 and the upper housing 4, and between the locking nut 10 and the lower housing 19, and are respectively glued and fixed to the surfaces of the upper housing 4 and the lower housing 19. The sum of the maximum compressive deformation of the elastic buffer 8 during operation and the gap v' between the elastic buffer 8 and the upper housing 4 constitutes the vertical movement space on the upward side of the vertical limiting structure, and the sum of the maximum compressive deformation of the elastic buffer 8 during operation and the gap v' between the elastic buffer 8 and the lower housing 19 constitutes the vertical movement space on the downward side of the vertical limiting structure. Correspondingly, the lower housing of all elastic vibration isolation devices adopts a box-type structure, and the limiting baffles in the longitudinal limiting structure of elastic vibration isolation device A and the transverse limiting device of elastic vibration isolation device D are also located outside the limiting support. All elastic vibration isolation devices are equipped with vertical limiting structures.

[0092] In the technical solution described in this example, both the upper and lower shells of the elastic vibration isolation device adopt a box-type structure, which has stronger bending resistance and helps maintain the stability of the load-bearing platform. Of course, as Figure 33 As shown, the elastic buffer 8 in the vertical limiting structure can also fill the gap between the locking nut 10 and the upper housing 4 and the gap between the locking nut 10 and the lower housing 19. At this time, the maximum compression deformation of the elastic buffer 8 during operation is the vertical movement space of the vertical limiting structure, which is also within the protection scope required by this invention.

[0093] Example 10

[0094] Based on the technical principles described in Embodiment Nine, such as Figure 34 The anti-sway elastic vibration isolation system of the present invention is shown below, and Figure 10 The difference in the technical solution is that the vertical limiting device also includes an elastic buffer 8, which includes multiple metal disc springs arranged in series. The elastic buffer 8 is disposed between the locking nut 10 and the support frame 1 and maintains direct contact with the locking nut and the support frame. The maximum compression deformation of the elastic buffer during operation constitutes the vertical movement space.

[0095] and Figure 10Compared to the aforementioned technical solutions, the anti-sway elastic vibration isolation system of this invention, due to the addition of an elastic buffer, prevents the locking nut from directly colliding with the support platform when it sways. The force between the two is buffered by the elastic buffer before being transmitted to each other, effectively protecting the vertical limiting device and the support platform from damage and improving the system's service life. Of course, when designing and calculating such a technical solution, the influence of the elastic buffer's stiffness on the natural frequency of the vibration isolation system must also be considered.

[0096] based on Figure 34 The technical principle of the technical solution shown is as follows: Figure 35 As shown, the elastic buffer 8 is made of polyurethane elastic pad. The elastic buffer 8 is adhered and fixed to the surface of the support frame 1. The elastic buffer is positioned between the locking nut 10 and the support frame 1, occupying only a portion of the gap between the locking nut and the support frame. At this time, the sum of the maximum compression deformation of the elastic buffer during operation and the gap between the elastic buffer and the support frame constitutes the vertical movement space. In addition, the limiting connecting screw 22 and the bottom foundation 17 are also fixedly connected by a detachable threaded structure. These are simple variations based on the technical principle of this invention, which can achieve good technical effects and are within the protection scope claimed by this invention.

[0097] The embodiments in this invention are only for better illustrating the technical solutions of this invention and should not be regarded as limitations on this invention. The technical features in many of the embodiments can also be used interchangeably. Based on the technical principles of this invention, those skilled in the art can recombine the technical solutions described in the above embodiments or use similar technologies to simply replace some of the components. As long as they are based on the technical principles of this invention, they are all within the protection scope claimed by this invention.

Claims

1. A sway-resistant elastic vibration isolation system, comprising a support frame and an elastic vibration isolation device, wherein the elastic vibration isolation device is located between the support frame and the bottom foundation, characterized in that, The elastic vibration isolation device includes an upper shell, an elastic element, and a lower shell. The elastic element is located between the upper shell and the lower shell. The upper shell is firmly connected to the support frame, and the lower shell is firmly connected to the bottom foundation. At least two rows and at least two columns of elastic vibration isolation devices are provided under the support platform. The elastic vibration isolation devices in each row are arranged longitudinally along the support platform. One row includes at least two elastic vibration isolation devices and a lateral limiting structure is provided in the at least two elastic vibration isolation devices in that row, forming a limiting row. The elastic vibration isolation devices in each column are arranged transversely along the support platform. One column includes at least two elastic vibration isolation devices and a longitudinal limiting structure is provided in the at least two elastic vibration isolation devices in that column, forming a limiting column. At least three elastic vibration isolation devices are provided with vertical limiting structures, or at least three vertical limiting devices are provided between the support platform and the bottom foundation.

2. The anti-sway elastic vibration isolation system as described in claim 1, characterized in that, The elastic vibration isolation device located at the intersection of the limiting row and the limiting column is equipped with both longitudinal limiting structure and lateral limiting structure.

3. The anti-sway elastic vibration isolation system as described in claim 1, characterized in that, Both the longitudinal limiting structure and the transverse limiting structure include a limiting baffle and a limiting support. The limiting baffle is fixedly installed on the upper shell of the elastic vibration isolation device, and the limiting support is fixedly installed on the lower shell. There is a longitudinal movement space between the limiting baffle and the limiting support of the longitudinal limiting structure, and there is a transverse movement space between the limiting baffle and the limiting support of the transverse limiting structure.

4. The anti-sway elastic vibration isolation system as described in claim 3, characterized in that, The longitudinal limiting structure and the lateral limiting structure also include an elastic buffer. The elastic buffer is fixed on the limiting baffle or the limiting support. The maximum compression deformation of the elastic buffer during operation, or the sum of the maximum compression deformation of the elastic buffer during operation and the gap between the elastic buffer and the limiting baffle, or the sum of the maximum compression deformation of the elastic buffer during operation and the gap between the elastic buffer and the limiting support constitutes the longitudinal movement space or the lateral movement space.

5. The anti-sway elastic vibration isolation system as described in claim 3, characterized in that, The lateral movement space is greater than the maximum lateral displacement between the upper and lower shells on the support platform when the object to be protected is working normally, and less than the maximum allowable lateral displacement between the upper and lower shells on the support platform when the displacement of the object to be protected and the pipeline is kept within the allowable range under the condition of bottom foundation swaying; the longitudinal movement space is greater than the maximum longitudinal displacement between the upper and lower shells on the support platform when the object to be protected is working normally, and less than the maximum allowable longitudinal displacement between the upper and lower shells on the support platform when the displacement of the object to be protected and the pipeline is kept within the allowable range under the condition of bottom foundation swaying.

6. The anti-sway elastic vibration isolation system as described in claim 3, characterized in that, The longitudinal limiting structure also includes a buffer guide, which includes an elastic buffer and a guide plate. An adjusting screw and a locking nut are fixedly installed on the guide plate. One end of the buffer guide is connected and fixed to the limiting support through the adjusting screw and the locking nut, and the other end is connected to the limiting baffle through the elastic buffer. The maximum compression deformation of the elastic buffer during operation, or the sum of the maximum compression deformation of the elastic buffer during operation and the gap between the elastic buffer and the limiting baffle, constitutes the longitudinal movement space.

7. The anti-sway elastic vibration isolation system as described in claim 1, characterized in that, The lateral limiting structure also includes a buffer guide, which includes an elastic buffer and a guide plate. An adjusting screw and a locking nut are fixedly installed on the guide plate. One end of the buffer guide is connected and fixed to the limiting support through the adjusting screw and the locking nut, and the other end is connected to the limiting baffle through the elastic buffer. The maximum compression deformation of the elastic buffer during operation, or the sum of the maximum compression deformation of the elastic buffer during operation and the gap between the elastic buffer and the limiting baffle, constitutes the lateral movement space.

8. The anti-sway elastic vibration isolation system as described in claim 6 or 7, characterized in that, The elastic buffer is integrated with the guide plate.

9. The anti-sway elastic vibration isolation system as described in claim 1, characterized in that, The vertical limiting structure includes a vertical limiting connecting screw, an upper limiting assembly, a lower limiting assembly, and a locking nut. The upper limiting assembly includes an integrated upper limiting component and an upper elastic buffer component. The lower limiting assembly includes an integrated lower limiting component and a lower elastic buffer component. The lower part of the vertical limiting connecting screw is fixedly connected to the lower housing or the bottom foundation. The upper and lower limiting components are connected to the connecting screw through a threaded structure. The upper part of the vertical limiting connecting screw passes through the lower limiting assembly, the upper housing, and the upper limiting assembly sequentially from bottom to top. In the static load state, there is a vertical movement space between the upper limiting assembly and the upper housing, and between the lower limiting assembly and the upper housing.

10. The anti-sway elastic vibration isolation system as described in claim 9, characterized in that, The threaded structure consists of locking nuts integrally installed on the upper and lower limit components.

11. The anti-sway elastic vibration isolation system as described in claim 1, characterized in that, The vertical limiting structure includes a vertical limiting connecting screw and a locking nut. The vertical limiting connecting screw is fixedly connected to the lower housing or the bottom foundation. The vertical limiting connecting screw is connected to the upper housing and / or the lower housing through the locking nut. A vertical movement space is provided between the locking nut and the upper housing and / or the lower housing.

12. The anti-sway elastic vibration isolation system as described in claim 11, characterized in that, The vertical limiting structure also includes an elastic buffer, which is disposed between the locking nut and the upper housing and / or the lower housing. The maximum compression deformation of the elastic buffer during operation, or the sum of the maximum compression deformation of the elastic buffer during operation and the gap between the elastic buffer and the upper housing, or the sum of the maximum compression deformation of the elastic buffer during operation and the gap between the elastic buffer and the lower housing constitutes the vertical movement space.

13. The anti-sway elastic vibration isolation system as described in claim 1, characterized in that, The vertical limiting device includes a limiting connecting screw and a locking nut. The lower part of the limiting connecting screw is fixedly connected to the bottom foundation, and the upper part of the limiting connecting screw is connected to the bearing platform through locking nuts respectively provided on both sides of the bearing platform. Vertical movement space is provided between the locking nut and the bearing platform.

14. The anti-sway elastic vibration isolation system as described in claim 13, characterized in that, The vertical limiting device also includes an elastic buffer, which is disposed between the locking nut and the support frame. The maximum compression deformation of the elastic buffer during operation, or the sum of the maximum compression deformation of the elastic buffer during operation and the gap between the elastic buffer and the support frame, constitutes the vertical movement space.

15. The anti-sway elastic vibration isolation system as described in any one of claims 9, 11, 12, 13 or 14, characterized in that, The vertical movement space is greater than the maximum vertical displacement between the upper and lower shells on the support platform when the object to be protected is working normally, and less than the maximum allowable vertical displacement between the upper and lower shells on the support platform when the displacement of the object to be protected and the pipeline is kept within the allowable range under the condition of bottom foundation shaking.

16. The anti-sway elastic vibration isolation system as described in claim 1, characterized in that, The elastic vibration isolation device also includes a damping element, which is disposed between the upper housing and the lower housing.

17. The anti-sway elastic vibration isolation system as described in claim 1, characterized in that, The elastic vibration isolation device also includes a damping element, which is connected in parallel with the elastic vibration isolation device between the support frame and the bottom foundation. The vertical vibration mode damping ratio and the sway mode damping ratio of the anti-sway elastic vibration isolation system are between 8% and 30%.

18. The anti-sway elastic vibration isolation system as described in claim 16 or 17, characterized in that, The damping element includes a viscous damper, an eddy current damper, a pinhole throttling damper, an elastic rubber damper, or an elastic polyurethane damper.

19. The anti-sway elastic vibration isolation system as described in claim 1, characterized in that, The elastic element includes a helical steel spring, a metal disc spring, a rubber elastomer, a polyurethane elastomer, or a metal-rubber composite elastomer.

20. The anti-sway elastic vibration isolation system as described in claim 1, characterized in that, When there are more than two rows of elastic vibration isolation devices arranged laterally along the bearing platform, the limiting row is set near the middle of the bearing platform.

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