Anti-swing elastic vibration isolation system

Abstract

The invention 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] The present invention belongs to the field of vibration control technology, and relates to an elastic vibration isolation platform which is arranged on a bottom foundation and has shaking, and in particular to an elastic vibration isolation system which is suitable for being arranged on an offshore working platform or a high-altitude platform for active vibration isolation of power equipment or passive vibration isolation of precision equipment. Background Art

[0002] In the field of power equipment, such as motors and compressors, in order to prevent the vibration generated during the operation of mechanical equipment from having an adverse effect on the surrounding environment or equipment, a load-bearing stand and an elastic vibration isolation device are often used to form an elastic vibration isolation foundation, and then the power equipment is arranged on the elastic vibration isolation foundation. In this way, the vibration generated during the operation of the power equipment will be effectively isolated by the elastic vibration isolation foundation, and the adverse effects on the surrounding environment and equipment will be greatly reduced. However, traditional elastic vibration isolation foundations (vibration isolation platforms) are mainly developed for equipment working on land. For example, the vertical foundation vibration isolation device with China's authorization announcement number CN202301734U and the foundation vibration isolation system having the same have a fixed bottom foundation (except for earthquakes). For special working conditions with wind and waves at sea, the bottom foundation is shaking. While isolating, the load-bearing frame will produce a large shaking, which can easily cause damage to components such as connecting pipes or couplings between adjacent equipment, or damage to the hydraulic bearings of the equipment, resulting in the equipment being unable to work normally. On the other hand, multi-layer offshore platforms located in the far sea have extremely stringent requirements on the weight of the load-bearing frame, which is often 1 / 10-1 / 4 of that of onshore equipment. They are usually welded from steel sections and steel plates. Compared with ground buildings, the local bearing capacity of such offshore buildings usually has more stringent restrictions. Excessive shaking will generate a large dynamic load at the vibration isolation device, shortening the fatigue life of the offshore platform.

[0003] In addition, power equipment working on high-altitude platforms on land, such as generators and gearboxes working on wind towers, will also experience greater shaking due to the swing of the tower under wind excitation, affecting the normal operation of the motor and speed change gearbox. In addition, although some equipment is installed on land, it cannot be allowed to be damaged by shaking during an earthquake, such as the emergency generator set in a nuclear power plant. For these working conditions, traditional elastic vibration isolation foundations without limits are not safe enough and cannot meet the use requirements.

[0004] In summary, the market urgently needs to provide a vibration isolation platform that can operate safely even under bottom foundation shaking conditions and achieve good vibration isolation effects. Summary of the invention

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

[0006] The anti-sway elastic vibration isolation system of the present invention is implemented as follows: it includes a load-bearing frame and an elastic vibration isolation device, the elastic vibration isolation device is located between the load-bearing frame and the bottom foundation, 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 load-bearing 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 load-bearing frame, the elastic vibration isolation devices of each row are arranged along the longitudinal direction of the load-bearing frame, one row includes at least two elastic vibration isolation devices and a lateral limiting structure is arranged in at least two elastic vibration isolation devices in the row, forming a limiting row; the elastic vibration isolation devices of each column are arranged along the transverse direction of the load-bearing frame, one column includes at least two elastic vibration isolation devices and a longitudinal limiting structure is arranged in at least two elastic vibration isolation devices in the column, forming a limiting column; at least three elastic vibration isolation devices are provided with a vertical limiting structure or at least three vertical limiting devices are arranged between the load-bearing frame and the bottom foundation.

[0007] If necessary, the elastic vibration isolation device located at the intersection of the limit row and the limit column is provided with a longitudinal limit structure and a transverse limit structure at the same time.

[0008] The specific structural forms of the longitudinal limiting structure and the transverse limiting structure described in the present invention are various. Typically, the longitudinal limiting structure and the transverse limiting structure both include a limiting baffle and a limiting support, wherein the limiting baffle is fixedly arranged on the upper shell of the elastic vibration isolation device, and the limiting support is fixedly arranged on the lower shell. A longitudinal movement space is provided between the limiting baffle and the limiting support of the longitudinal limiting structure, and a transverse movement space is provided between the limiting baffle and the limiting support of the transverse limiting structure. Based on the above principle, if necessary, the longitudinal limiting structure and the transverse limiting structure may also include an elastic buffer, which 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 constitute the longitudinal movement space or the transverse movement space. Regarding the setting of the lateral movement space and the longitudinal movement space, it can be determined according to the following principles through simulation calculations, simulation tests, engineering experience values ​​and other technical measures: the lateral movement space is larger than the maximum displacement between the upper shell and the lower shell in the lateral direction of the bearing platform when the object to be protected on the bearing platform is working normally, and is smaller than the corresponding maximum displacement allowed between the upper shell and the lower shell in the lateral direction of the bearing platform when the displacement of the object to be protected and the pipeline is kept within the allowable range under the bottom foundation shaking condition; the longitudinal movement space is larger than the maximum displacement between the upper shell and the lower shell in the longitudinal direction of the bearing platform when the object to be protected on the bearing platform is working normally, and is smaller than the corresponding maximum displacement allowed between the upper shell and the lower shell in the longitudinal direction of the bearing platform when the displacement of the object to be protected and the pipeline is kept within the allowable range under the bottom foundation shaking condition.

[0009] Based on the above principle, as another typical structure, the longitudinal limiting structure described in the present invention may also include a buffer guide, the buffer guide includes an elastic buffer and a guide pressing plate, an adjusting screw and a locking nut are fixedly arranged on the guide pressing plate, one end of the buffer guide is connected and fixed with the limiting support through the adjusting screw and the locking nut, and the other end is matched with the limiting baffle through the elastic buffer, the maximum compression deformation of the elastic buffer during work, or the maximum compression deformation of the elastic buffer during work and the sum of the gap between the elastic buffer and the limiting baffle constitute the longitudinal movement space; similarly, the transverse limiting structure may also include a buffer guide, the buffer guide includes an elastic buffer and a guide pressing plate, an adjusting screw and a locking nut are fixedly arranged on the guide pressing plate, one end of the buffer guide is connected and fixed with the limiting support through the adjusting screw and the locking nut, and the other end is matched with the limiting baffle through the elastic buffer, the maximum compression deformation of the elastic buffer during work, or the sum of the maximum compression deformation of the elastic buffer during work and the gap between the elastic buffer and the limiting baffle constitute the transverse movement space. Preferably, the elastic buffer members in the longitudinal limiting structure and the transverse limiting structure are integrated with the guide pressing plate.

[0010] The specific structural form of the vertical limit structure in the present invention can also be varied, for example: (1) The vertical limit structure includes a connecting screw, an upper limit assembly, a lower limit assembly and a locking nut, the upper limit assembly includes an upper limit part and an upper elastic buffer part that are integrally arranged, the lower limit assembly includes a lower limit part and a lower elastic buffer part that are integrally arranged, the lower part of the connecting screw is fixedly connected to the lower shell or the bottom base, the upper limit part and the lower limit part are connected to the connecting screw through a threaded structure, the upper part of the connecting screw passes through the lower limit assembly, the upper shell and the upper limit assembly from bottom to top in sequence, and a vertical movement space is provided between the upper limit assembly and the upper shell and between the lower limit assembly and the upper shell in a static load state. Typically, the threaded structure is a locking nut that is integrally arranged on the upper limit part and the lower limit part, respectively (2) The vertical limit structure includes a vertical limit connecting screw and a locking nut, the vertical limit connecting screw is connected to the upper shell or / and the lower shell through the locking nut, and a vertical movement space is provided between the locking nut and the upper shell or / and the lower shell. Of course, if necessary, the vertical limiting structure also includes an elastic buffer, which is arranged between the locking nut and the upper shell and / or the lower shell, and the maximum compression deformation of the elastic buffer during work, or the sum of the maximum compression deformation of the elastic buffer during work and the gap between the elastic buffer and the upper shell, or the sum of the maximum compression deformation of the elastic buffer during work and the gap between the elastic buffer and the lower shell constitutes the vertical movement space.

[0011] The anti-sway elastic vibration isolation system of the present invention can also use a vertical limit device to control the swing amplitude of the support frame. Typically, the vertical limit device includes a limit connecting screw and a locking nut. The lower part of the limit connecting screw is fixedly connected to the bottom foundation, and the upper part of the limit connecting screw is connected to the support frame through the locking nuts respectively arranged on both sides of the corresponding support frame. A vertical movement space is respectively arranged between the locking nut and the support frame. Of course, the vertical limit device can also include an elastic buffer, which is arranged 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. Regarding the setting of the vertical movement space, it can be determined through simulation calculations, simulation tests, engineering experience values ​​and other technical measures according to the following principles: the vertical movement space is larger than the maximum vertical displacement of the upper shell and the lower shell on the load-bearing platform when the object to be protected on the load-bearing platform works normally, and is smaller than the maximum vertical displacement of the upper shell and the lower shell on the load-bearing platform when the displacement of the object to be protected and the pipeline remains within the allowable range under the bottom foundation shaking condition.

[0012] In order to improve the damping of the system, the elastic vibration isolation device in the present invention may also include a damping element, which is arranged between the upper shell and the lower shell; or, the anti-sway elastic vibration isolation system of the present invention also includes a damping element, which is arranged in parallel with the elastic vibration isolation device between the bearing frame and the bottom foundation, and the vertical vibration mode damping ratio and the swing mode damping ratio of the anti-sway elastic vibration isolation system are between 8% and 30%. The types of damping elements can be various, including viscous dampers, eddy current dampers, small hole throttling dampers, elastic rubber dampers or elastic polyurethane dampers, etc. As long as the damping performance, service life and working conditions meet the engineering needs, they can be applied to the present invention. In addition, in the anti-sway elastic vibration isolation system of the present invention, the elastic elements used in the elastic vibration isolation device can be various, and the elastic elements include spiral steel springs, metal disc springs, rubber elastomers, polyurethane elastomers or metal rubber composite elastomers, etc., which can be selected according to the actual needs of the project in practice.

[0013] It should be pointed out that in order to ensure that the deformation of the elastic vibration isolation device caused by the thermal expansion and contraction of the load-bearing platform is as balanced as possible, when there are more than two rows of elastic vibration isolation devices arranged along the horizontal direction of the load-bearing platform, the limit row is set close to the middle of the load-bearing platform. In addition, the row spacing between the two rows of elastic vibration isolation devices arranged along the longitudinal direction of the load-bearing platform should also be as large as possible, so as to better improve the stability of the load-bearing platform.

[0014] The anti-sway elastic vibration isolation system of the present invention orthogonally sets limit rows and limit columns, and adds lateral limit structures in at least two elastic vibration isolation devices of the limit rows, and adds longitudinal limit structures in at least two elastic vibration isolation devices of the limit columns. On the one hand, it can effectively control the lateral displacement and longitudinal displacement of the above-mentioned elastic vibration isolation devices, and then achieve the technical effect of controlling the lateral displacement and longitudinal displacement of the entire bearing platform, so that when the equipment shakes on the bottom foundation (due to wind and waves, wind vibration, and earthquake), the shaking amplitude of the equipment and pipelines is controlled within the allowed range and works normally; on the other hand, it can release the thermal expansion and contraction of the bearing platform without hindrance. Taking a steel bearing platform with a length of 20 meters and a width of 10 meters as an example, under a temperature difference of 50°C, it can produce a longitudinal displacement of 12 mm and a lateral displacement of 6 mm. Through the orthogonal (vertical) setting of the limit rows and limit columns, the longitudinal and lateral displacements of the bearing platform and the bottom foundation due to thermal expansion and contraction can be released without hindrance while being limited in three directions. If it is not an orthogonal design, the longitudinal limit and the lateral limit will conflict, and the thermal expansion and contraction displacement will cause the limit contact to be stuck, thereby causing the system to lose its vibration isolation effect; third, by providing at least three vertical limit devices in the system or adding vertical limit structures to at least three elastic vibration isolation devices, the upward and downward amplitudes of the load-bearing frame fixedly connected to the upper shell can be effectively restricted, thereby improving the anti-sway performance of the load-bearing frame; 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%. The present invention reduces the swing amplitude and up and down amplitude of the vibration isolation platform by maintaining a larger modal damping ratio (8% to 30%) in the system.

[0015] Compared with the traditional vibration isolation platform, the implementation of the above-mentioned 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, the load-bearing frame is always elastically supported in the vertical direction, and has good vibration isolation performance; (2) When the load-bearing frame is stimulated by the bottom foundation to produce a large shake, the lateral limit structure and the longitudinal limit structure are used to achieve reliable limit in the lateral and longitudinal directions of the load-bearing frame. The orthogonal setting of the limit row and the limit column can effectively control the lateral and longitudinal displacement of the load-bearing frame while releasing the thermal expansion and contraction displacement of the bottom foundation and the load-bearing frame without hindrance; (3) When the load-bearing frame is stimulated to produce a large shake, the vertical limit device or the vertical limit structure is used to effectively control the swing amplitude of the load-bearing frame within the vertical movement space. When the swing amplitude is to be increased, the vertical limit device or the vertical limit structure It will be completely stuck and firmly restrict the load-bearing platform. In this way, the swing and displacement of the equipment and pipelines to be protected on the load-bearing platform will be controlled within a limited range and will not be damaged; (4) It can provide at least four points of elastic support for the load-bearing platform. Compared with the three-point support vibration isolation system used abroad, it has more support points and the load-bearing capacity of a single support point is relatively smaller, which can reduce the amount of steel used in the load-bearing platform and the bottom foundation. Taking the typical high-altitude platform in the engineering field, the offshore work platform, as an example, the bearing strength requirements of the steel structure of the offshore work platform are lower, which is beneficial to improving the stress conditions of the offshore work platform and also beneficial to reducing the construction cost of the offshore work platform; (5) For high-altitude platform steel structures of the same strength, since the bearing points in the anti-sway elastic vibration isolation system of the present invention are more dispersed, it is beneficial to place equipment with larger size and weight, thereby improving the space utilization efficiency of the platform.

[0016] To sum up, the anti-sway elastic vibration isolation system of the present invention has good vibration isolation effect, strong anti-sway ability, high stability, relatively more dispersed and uniform load distribution, low strength requirement for a single support point, and can be widely used in vibration control projects of supporting equipment of offshore or onshore high-altitude platforms such as offshore steel structure working platforms or wind power steel structure towers. It can also be used for vibration isolation platforms on land where equipment is not allowed to sway significantly during earthquakes, including but not limited to power equipment such as motors, compressors, fans, turbines, pumps, hydraulic pump stations, emergency generator sets, air-conditioning units, and also precision equipment such as main control rooms and living area modules. BRIEF DESCRIPTION OF THE DRAWINGS

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

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

[0027] Fig.11 for Figure 7 Schematic diagram of the longitudinal limit structure at F of the elastic vibration isolation device A (Part 1) Fig.12 This is a schematic diagram of a typical lateral limiting structure and longitudinal limiting structure in an elastic vibration isolation device.

[0028] Fig.13 for Figure 7 The second schematic diagram of the longitudinal limit structure at F of the middle elastic vibration isolation device A.

[0029] Fig.14 for Figure 7 Schematic diagram of the longitudinal limit structure at F of the middle elastic vibration isolation device A.

[0030] Fig.15 This is the second working principle diagram of the anti-sway elastic vibration isolation system of the present invention.

[0031] Fig.16 for Fig.15 A partial enlarged view of the elastic vibration isolation device C in the left view.

[0032] Fig.17 for Fig.15A partial enlarged view of the elastic vibration isolation device C in the bottom view.

[0033] Fig.18 for Fig.15 A partial enlarged view of the elastic vibration isolation device D in the left view.

[0034] Fig.19 for Fig.15 A partial enlarged view of the elastic vibration isolation device A in the bottom view.

[0035] Fig. 20 for Fig.15 A partial enlarged view of the elastic vibration isolation device B in the left view.

[0036] Fig.21 for Fig.15 A partial enlarged view of the elastic vibration isolation device B in the bottom view.

[0037] Fig. 22 This is the third working principle diagram of the anti-sway elastic vibration isolation system of the present invention.

[0038] Fig.23 This is the fourth working principle diagram of the anti-sway elastic vibration isolation system of the present invention.

[0039] Fig.24 This is the fifth working principle diagram of the anti-sway elastic vibration isolation system of the present invention.

[0040] Fig.25 This is the sixth working principle diagram of the anti-sway elastic vibration isolation system of the present invention.

[0041] Fig.26 This is the seventh working principle diagram of the anti-sway elastic vibration isolation system of the present invention.

[0042] Fig. 27 This is the eighth working principle diagram of the anti-sway elastic vibration isolation system of the present invention.

[0043] Fig.28 for Figure 1 The second partial enlarged view of the elastic vibration isolation device B in the left view.

[0044] Fig.29 for Figure 1 The second partial enlarged view of the elastic vibration isolation device B in the bottom view.

[0045] Fig.30 for Figure 1 The third partial enlarged view of the elastic vibration isolation device B in the bottom view.

[0046] Fig.31 for Figure 1 The second partial enlarged view of the elastic vibration isolation device C in the left view.

[0047] Fig.32 for Figure 1 The second partially enlarged view of the elastic vibration isolation device C in the bottom view.

[0048] Fig.33 for Figure 1 The third partial enlarged view of the elastic vibration isolation device C in the bottom view.

[0049] Fig.34 for Figure 1 The second EE cross-sectional view.

[0050] Fig.35 for Figure 1 The third EE cross-sectional view. DETAILED DESCRIPTION

[0051] Embodiment 1 like Figure 1 — Fig.11 The anti-sway elastic vibration isolation system of the present invention includes a load-bearing platform 1 and four elastic vibration isolation devices. The elastic vibration isolation device is located between the load-bearing platform 1 and the bottom foundation 17. The bottom foundation 17 is located on the offshore steel structure platform. The longitudinal direction is the horizontal length direction of the load-bearing platform, the transverse direction is the horizontal width direction of the load-bearing platform, and the vertical direction is the vertical direction of the horizontal surface of the load-bearing 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, which is specifically The polyurethane microporous foam elastic block, the upper shell 4 is firmly connected to the bearing platform 1 through the fastener 18, and the lower shell 19 is firmly welded to the bottom foundation 17; four elastic vibration isolation devices are arranged orthogonally in two rows and two columns below the bearing platform 1, and the two elastic vibration isolation devices in each row are arranged along the longitudinal direction of the bearing platform, and a transverse limiting structure is set in the two elastic vibration isolation devices in one row to form a limiting row. At the same time, the two elastic vibration isolation devices in each column are arranged along the transverse direction of the bearing platform, and a longitudinal limiting structure is set in the two elastic vibration isolation devices in one column to form a limiting column. Specifically, Figure 1 As shown in , a transverse limiting structure 3 is respectively provided in the elastic isolator C and the elastic isolator D of the same row, and the row where the two are located constitutes the limiting row. At the same time, a longitudinal limiting structure 2 is respectively provided in the elastic isolator C and the elastic isolator A of the same column, and the column where the two are located constitutes the limiting column, wherein the elastic isolator C is located at the intersection of the limiting row and the limiting column, and a transverse limiting structure 3 and a longitudinal limiting structure 2 are provided on the elastic isolator C at the same time; the longitudinal limiting structure 2 and the transverse limiting structure 3 are both composed of a limiting baffle 5 and a limiting support 6, specifically, as shown in Figure 2 and Figure 4As shown in , the limit baffle 5 in the transverse limit structure 3 is fixedly arranged on the upper shell 4, the limit support 6 is fixedly arranged on the lower shell 19, and the limit support 6 is located on the outer side of the limit baffle 5. A transverse movement space d is left between the limit baffle 5 and the limit support 6 of the transverse limit structure 3. Similarly, as Figure 3 and Figure 7 as well as Fig.11 As shown in the figure, the limit baffle 5 in the longitudinal limit structure 2 is fixedly arranged on the upper shell 4, the limit support 6 is fixedly arranged on the lower shell 19, and the limit support 6 is located on the outside of the limit baffle 5. A longitudinal movement space h is left between the limit baffle 5 and the limit support 6 of the longitudinal limit 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 FIG. Figure 8 and Fig. 9 As shown, since the elastic isolator B is neither in the limiting row nor in the limiting column, it has neither a lateral limiting structure nor a longitudinal limiting structure. In addition, as shown in FIG. Fig.10 As shown, the anti-sway elastic vibration isolation system of the present invention described in this example also includes a vertical limit device, and the vertical limit device is provided with four groups in total, which are respectively provided at the four corners of the bearing platform 1, and the vertical limit device includes a limit connecting screw 22 and a locking nut 10. The lower part of the limit connecting screw 22 is fixedly connected to the bottom foundation 17, and the upper part of the limit connecting screw 22 is connected to the bearing platform 1 through the locking nuts 10 respectively provided on both sides of the corresponding bearing platform 1, and a vertical moving space v is respectively provided between the locking nuts 10 and the bearing platform 1.

[0052] 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, the polyurethane microporous foam elastic block can be used as an elastic element and a damping element at the same time. The damping provided by the polyurethane microporous foam elastic block makes the vertical vibration modal damping ratio, lateral swing damping ratio, and longitudinal swing damping ratio of the anti-sway elastic vibration isolation system of the present invention reach 8%; the setting of the lateral movement space d and the longitudinal movement space h can be determined according to the following principles through simulation calculations, simulation tests, engineering experience values ​​and other technical measures. The lateral movement space d is greater than the distance between the upper shell and the lower shell when the object to be protected on the load-bearing stand is working normally. The maximum displacement between the upper and lower shells in the lateral direction of the load-bearing platform (generally within the range of ±0.1mm), and is smaller than the maximum displacement allowed between the upper and lower shells in the lateral direction of the load-bearing platform when the displacement of the object to be protected and the pipeline is kept within the allowable range under the bottom foundation shaking condition (generally within the range of ±2.0mm); the longitudinal movement space h is larger than the maximum displacement between the upper and lower shells in the longitudinal direction of the load-bearing platform when the object to be protected on the load-bearing platform works normally (generally within the range of ±1.0mm), and is smaller than the maximum displacement allowed between the upper and lower shells in the longitudinal direction of the load-bearing platform when the displacement of the object to be protected and the pipeline is kept within the allowable range under the bottom foundation shaking condition. According to the needs of the project, the size of 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 through simulation calculations, simulation tests, engineering experience values ​​and other technical measures according to the following principles: the vertical movement space is larger than the maximum vertical displacement between the upper shell and the lower shell of the load-bearing platform when the object to be protected on the load-bearing platform works normally, and is smaller than the maximum vertical displacement between the upper shell and the lower shell of the load-bearing platform when the displacement of the object to be protected and the pipeline remains within the allowable range under the condition of bottom foundation shaking.

[0053] The anti-sway elastic vibration isolation system of the present invention, by orthogonally arranging limit rows and limit columns, and adding a lateral limit structure in the elastic vibration isolation device of the limit row, and adding a longitudinal limit structure in the elastic vibration isolation device of the limit column, on the one hand, realizes the technical effect of effectively controlling the lateral displacement and longitudinal displacement of the above-mentioned elastic vibration isolation device, and then controlling the lateral displacement and longitudinal displacement of the entire bearing platform, so that when the equipment shakes on the bottom foundation (due to wind and waves, wind vibration, earthquake), the shaking amplitude of the equipment and pipeline is controlled within the allowable range and works normally; on the other hand, the orthogonal arrangement of the limit rows and limit columns can release the thermal expansion and contraction of the bearing platform without hindrance. Taking a steel bearing platform with a length of 20 meters and a width of 10 meters as an example, under a temperature difference of 50°C, a longitudinal displacement of 12 mm and a lateral displacement of 6 mm can be generated. By orthogonally (vertically) arranging the limit rows and limit columns, the longitudinal and lateral displacements of the bearing platform and the bottom foundation due to thermal expansion and contraction can be released without hindrance while being limited in three directions. If it is not an orthogonal design, the longitudinal limit and the lateral limit will conflict, and the thermal expansion and contraction displacement will cause the limit contact to be stuck, thereby causing the system to lose its vibration isolation effect; third, by arranging four vertical limit devices in the system, the upward and downward amplitudes of the load-bearing frame fixedly connected to the upper shell can be effectively restricted, thereby improving the anti-sway performance of the load-bearing frame; fourth, the modal damping ratio of the elastic vibration isolation foundation (vibration isolation platform) of general ground rotary power equipment is between 5% and 10%. The present invention reduces the swing amplitude and up and down amplitude of the vibration isolation platform by maintaining a larger modal damping ratio (8%-30%) in the system. Of course, in this example, the system modal damping ratio of 8% is used as an example for explanation. In actual engineering, the system modal damping ratio can be set to 30% by adopting high-performance damping elements, increasing the number of damping elements and other technical means. The specific design should be based on the needs of the project. If necessary, even special damping elements can be added between the bearing frame and the bottom foundation, such as viscous dampers, eddy current dampers, small-hole throttling dampers, elastic rubber dampers or elastic polyurethane dampers, etc. As long as the damping performance, service life and working conditions meet the needs of the project, they can be applied to the present invention.

[0054] Compared with the traditional vibration isolation platform, 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, the load-bearing frame is always elastically supported in the vertical direction, and has good vibration isolation performance; (2) When the load-bearing frame is stimulated by the bottom foundation to produce a large shake, the lateral limit structure and the longitudinal limit structure are used to achieve reliable limit in the lateral and longitudinal directions of the load-bearing frame. The orthogonal setting of the limit row and the limit column can effectively control the lateral and longitudinal displacement of the load-bearing frame while releasing the thermal expansion and contraction displacement of the bottom foundation and the load-bearing frame without hindrance; (3) When the load-bearing frame is stimulated to produce a large shake, the vertical limit device is used to effectively control the swing amplitude of the load-bearing frame within the vertical movement space. If the swing amplitude wants to increase, the vertical limit device or the vertical limit structure will completely (4) The load-bearing frame is locked and firmly restricted. In this way, the swing amplitude and displacement of the equipment and pipelines to be protected on the load-bearing frame are controlled within a limited range and will not be damaged; (5) At least four points of elastic support can be provided for the load-bearing frame. Compared with the three-point support vibration isolation system used abroad, it has more support points and the load-bearing capacity of a single support point is relatively smaller, which can reduce the amount of steel used in the load-bearing frame and the bottom foundation. Taking the typical high-altitude platform in the engineering field, the offshore work platform, as an example, the bearing strength requirements of the steel structure of the offshore work platform are lower, which is beneficial to improving the stress conditions of the offshore work platform and also beneficial to reducing the construction cost of the offshore work platform; (6) For high-altitude platform steel structures of the same strength, since the bearing points in the anti-sway elastic vibration isolation system of the present invention are more dispersed, it is beneficial to place equipment with larger size and weight, thereby improving the space utilization efficiency of the platform.

[0055] To sum up, the anti-sway elastic vibration isolation system of the present invention has good vibration isolation effect, strong anti-sway ability, high stability, relatively more dispersed and uniform load distribution, low strength requirement for a single support point, and can be widely used in vibration control projects of supporting equipment of offshore or onshore high-altitude platforms such as offshore steel structure working platforms or wind power steel structure towers. It can also be used for vibration isolation platforms on land where equipment is not allowed to sway significantly during earthquakes, including but not limited to power equipment such as motors, compressors, fans, turbines, pumps, hydraulic pump stations, emergency generator sets, air-conditioning units, and also precision equipment such as main control rooms and living area modules.

[0056] It should be noted that, first, in this example, the elastic element is a polyurethane elastomer. In actual applications, the elastic element can also be a spiral steel spring, a metal disc spring, a rubber elastomer or a metal rubber composite elastomer and other types of products, which can be designed and selected according to engineering needs; second, it should be noted that based on the technical principle of the present invention, the specific forms of the longitudinal limit structure and the lateral limit structure in the elastic vibration isolation device of the anti-sway elastic vibration isolation system of the present invention can be various, in addition to the plate-type limit baffle and limit support mentioned above, such as Fig.12 As shown, the limit baffle 5 and the limit support 6 can also adopt a cylindrical structure, and the elastic element 11 can also adopt a spiral steel spring. The gaps between the limit baffle 5 and the limit support 6 of the cylindrical structure corresponding to the lateral and longitudinal directions of the load-bearing frame are the lateral movement space d and the longitudinal movement space h. According to the needs of the project, the sizes of the lateral movement space d and the longitudinal movement space h can be the same or different; thirdly, in addition to being fixedly connected with fasteners, the upper shell and the load-bearing frame can also be fixedly connected by welding or other methods. Similarly, in addition to being fixedly connected by welding, the lower shell and the bottom foundation can also be fixedly connected by fasteners or other methods; fourthly, in this example, four vertical limit devices are set as an example for explanation. In practice, at least three vertical limit devices should be set according to the size and load-bearing conditions of the load-bearing frame. Of course, five, six or even more vertical limit devices can also be set to ensure that the load-bearing frame is anti-turnover. These are simple changes based on the technical principles of the present invention. They are only described in words here, and no more drawings are provided one by one. They are all within the protection scope required by the present invention.

[0057] Embodiment 2 like Fig.13 The anti-sway elastic vibration isolation system of the present invention shown in the figure is different from the first embodiment in that the longitudinal limiting structure of the elastic vibration isolation device also includes an elastic buffer 8 made of rubber elastomer, and the elastic buffer 8 is vulcanized and fixedly connected to the limiting support 6, and a gap h' is left between the elastic buffer 8 and the limiting baffle 5.

[0058] Of course, based on the above technical principles, in the longitudinal limiting structure, the elastic buffer can also be fixedly set on the limiting baffle; in addition, in the transverse limiting structure of the elastic vibration isolation device, the elastic buffer can also be fixedly set on the limiting baffle or the limiting support. These are simple changes based on the technical principles of the present invention and are all within the protection scope required by the present invention.

[0059] Compared with Example 1, in the technical scheme described in this example, since an elastic buffer is added, when the supporting platform swings, the limit baffle will not directly stick to or collide with the limit support. The impact of the limit baffle will first be buffered by the elastic buffer and then act on the limit support, which can effectively reduce the collision noise, protect the limit baffle and the limit support structure from damage, and help to increase the service life of the system.

[0060] It should be pointed out that Fig.13 In the technical scheme shown in the figure, since the elastic buffer can be compressed during operation, the actual longitudinal movement space should be the sum of the gap h' left between the elastic buffer 8 and the limit baffle 5 and the maximum compression deformation of the elastic buffer 8 during operation. Therefore, attention should be paid in the design and calculation, and 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 needs to be considered; similarly, for the lateral limit structure with an additional elastic buffer, the same consideration should be given to the design and calculation of the lateral movement space.

[0061] based on Fig.13 The technical principles, such as Fig.14 As shown, the longitudinal limit structure of the elastic vibration isolation device also includes an elastic buffer 8, one side of which is vulcanized and fixedly connected to the limit baffle 5, and the other side of which is against the surface of the limit support. Fig.13 Compared with the technical solution shown, Fig.14 In the technical solution shown in , since the elastic buffer 8 fills the gap between the limit baffle 5 and the limit support 6, it can effectively prevent foreign objects from falling into the gap, which is safer and more reliable. It should be pointed out in particular that in the longitudinal limit structure of this structure, although there is no reserved gap between the limit baffle and the limit support, since the elastic buffer can be compressed, the maximum compression deformation of the elastic buffer during operation is the longitudinal movement space h of the longitudinal limit structure. Of course, this arrangement of elastic buffers can also be used in the transverse limit structure, and the maximum compression of the elastic buffer during operation is the transverse movement space d of the transverse limit structure. These are simple changes based on the technical principles of the present invention, which are only explained in text here, and no more drawings are provided one by one. They are all within the protection scope required by the present invention. The maximum compression deformation of the elastic buffer 8 during operation is repeatedly emphasized in the present invention because in some projects, the elastic buffer has been pre-compressed during installation. At this time, the pre-compression deformation of the elastic buffer should not be included in the longitudinal movement space, or the lateral movement space, or the vertical movement space. Attention should be paid to this during design and calculation. This feature is suitable for all technical solutions of the present invention in which elastic buffers are arranged in longitudinal limiting structures, lateral limiting structures, vertical limiting structures or vertical limiting devices, and is explained here.

[0062] Embodiment 3 like Figure 15-Figure 21 The anti-sway elastic vibration isolation system of the present invention shown in the figure is different from the second embodiment in that the elastic vibration isolation devices A, B, C and D are all provided with vertical limit structures; the elastic element 11 is a plurality of spiral steel springs provided between the upper shell 4 and the lower shell 19; Fig.16 As shown, in the elastic vibration isolation device C located in the limit row, the lateral limit structure includes a limit baffle 5, a buffer guide and a limit support 6, the limit baffle 5 is fixedly arranged on the upper shell 4 of the elastic vibration isolation device C, the limit support 6 is fixedly arranged on the lower shell 19, the buffer guide includes an integrated elastic buffer 8 and a guide pressing plate 7, an adjustment screw 9 and a locking nut 10 are fixedly arranged on the guide pressing plate 7, one end of the buffer guide is connected and fixed with the limit support 6 through the adjustment screw 9 and the locking nut 10, and the other end is matched with the limit baffle 5 through the elastic buffer 8, and the maximum compression deformation of the elastic buffer during work constitutes the lateral movement space; as shown Fig.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 upper limiting member 14 and an upper elastic buffer 13 which are integrally arranged, the lower limiting assembly includes a lower limiting member 15 and a lower elastic buffer 16 which are integrally arranged, the lower portion of the vertical limiting connecting screw 12 is connected to the lower shell 19 through a threaded structure and is 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 through a threaded structure, the threaded structure is a locking nut 10 which is integrally fixed on the upper limiting member 14 and the lower limiting member 15 by welding, the upper portion of the vertical limiting connecting screw 12 passes through the lower limiting assembly, the upper shell 4 and the upper limiting assembly from bottom to top, and the upper limiting assembly is connected to the upper shell in a static load state. 4 and between the lower limit assembly and the upper shell 4, that is, under normal working conditions, during the elastic deformation of the elastic element 11 caused by the vibration generated by the operation of the equipment above the isolation bearing platform, since the gap v' is set in the system, no contact or collision occurs between the upper limit assembly and the upper shell 4, and between the lower limit assembly and the upper shell 4, and no adverse effect is exerted on the vibration isolation performance, wherein the sum of the maximum compression deformation of the upper elastic buffer 13 during operation and the gap v' between the upper limit assembly and the upper shell 4 constitutes the vertical movement space of the vertical limit structure on the side above the matching part of the upper shell, and the sum of the maximum compression deformation of the lower elastic buffer 16 during operation and the gap v' between the lower limit assembly and the upper shell 4 constitutes the vertical movement space of the vertical limit structure on the side below the matching part of the upper shell; Fig.17As shown, the longitudinal limit structure in the elastic vibration isolation device C includes a limit baffle 5, a buffer guide and a limit support 6, the limit baffle 5 is fixedly arranged on the upper shell 4 of the elastic vibration isolation device, the limit support 6 is fixedly arranged on the lower shell 19, the buffer guide includes an integrated elastic buffer 8 and a guide pressing plate 7, an adjustment screw 9 and a locking nut 10 are fixedly arranged on the guide pressing plate 7, one end of the buffer guide is connected and fixed with the limit support 6 through the adjustment screw 9 and the locking nut 10, and the other end is matched with the limit baffle 5 through the elastic buffer 8, and the maximum compression deformation of the elastic buffer during work constitutes the longitudinal movement space; as shown Fig.17 As shown, in the elastic vibration isolation device C, two sets of vertical limiting structures are arranged between the limiting baffles 5. The specific form of the vertical limiting structure is the same as Fig.16 The above description is basically the same as that in the above description, and will not be repeated here; in addition, in order to improve the system damping, the elastic vibration isolation device in the present invention also includes a damping element 20, which is arranged between the upper shell 4 and the lower shell 19. The specific damping element 20 is a viscous damper. By using the viscous damper, the vertical vibration modal damping ratio, lateral swing damping ratio, and longitudinal swing damping ratio of the system can reach 30%. Based on the above description, if Fig.18 As shown, the elastic vibration isolation device D is only provided with a lateral limiting structure and a vertical limiting structure; Fig.19 As shown, the elastic vibration isolation device A is only provided with a longitudinal limiting structure and a vertical limiting structure; Fig. 20 and Fig.21 As shown, the elastic vibration isolation device B is only provided with a vertical limiting structure.

[0063] Compared with the first embodiment, in the anti-sway elastic vibration isolation system of the present invention described in this example, buffer guides are respectively provided in the longitudinal limiting structure and the transverse limiting structure. Therefore, the longitudinal movement space and the transverse movement space can be adjusted on-site according to actual needs, which is very convenient.

[0064] The anti-sway elastic vibration isolation system of the present invention described in this example is orthogonally arranged by setting limit rows and limit columns, and adding lateral limit structures in at least two elastic vibration isolation devices of the limit rows, and adding longitudinal limit structures in at least two elastic vibration isolation devices of the limit columns. On the one hand, it can effectively control the lateral displacement and longitudinal displacement of the above-mentioned elastic vibration isolation devices, and then achieve the technical effect of controlling the lateral displacement and longitudinal displacement of the entire load-bearing platform, so that when the equipment shakes on the bottom foundation (due to wind and waves, wind vibration, earthquake), the shaking amplitude of the equipment and pipelines is controlled within the allowable range and works normally; on the other hand, it can release the thermal expansion and contraction of the load-bearing platform without hindrance. Taking a steel load-bearing platform with a length of 20 meters and a width of 10 meters as an example, under a temperature difference of 50°C, it can produce a longitudinal displacement of 12 mm and a lateral displacement of 6 mm. Through the orthogonal (vertical) arrangement of the limit rows and limit columns, the longitudinal and lateral displacements of the load-bearing platform and the bottom foundation due to thermal expansion and contraction can be released without hindrance while being limited in three directions. If it is not an orthogonal design, the longitudinal limit and the lateral limit will conflict, and the thermal expansion and contraction displacement will cause the limit contact to be stuck, thus making the system lose its vibration isolation effect; thirdly, by adding a vertical limit structure to the four elastic vibration isolation devices in the system, the upward and downward amplitudes of the load-bearing frame fixedly connected to the upper shell can be effectively limited, thereby improving the anti-sway performance of the load-bearing frame, and Fig.10 Compared with the vertical limit device in the invention, a vertical limit structure is provided in each elastic vibration isolation device, so that a certain elastic vibration isolation device can be quickly installed and replaced separately, and it is more convenient to use; Fourthly, the modal damping ratio of the elastic vibration isolation foundation (vibration isolation platform) of the general ground rotary power equipment is between 5% and 10%. The present invention can effectively reduce the swing amplitude and the up and down amplitude of the vibration isolation platform by maintaining the modal damping ratio of 30% in the system. In practice, the modal damping ratio of the system can be controlled within the range of 8% to 30% according to engineering needs.

[0065] Compared with the traditional vibration isolation platform, 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, the load-bearing frame is always elastically supported in the vertical direction, and has good vibration isolation performance; (2) When the load-bearing frame is stimulated by the bottom foundation to produce a large shake, the lateral limit structure and the longitudinal limit structure are used to achieve reliable limit in the lateral and longitudinal directions of the load-bearing frame. The orthogonal setting of the limit row and the limit column can effectively control the lateral and longitudinal displacement of the load-bearing frame while releasing the thermal expansion and contraction displacement of the bottom foundation and the load-bearing frame without hindrance; (3) When the load-bearing frame is stimulated to produce a large shake, the vertical limit structure set in the elastic vibration isolation device can be used to effectively control the swing amplitude of the load-bearing frame within the vertical movement space. When the swing amplitude is to be increased, the vertical limit device or the vertical limit structure is used. The structure will be completely stuck, firmly restricting the load-bearing platform. In this way, the swing amplitude and displacement of the equipment and pipelines to be protected on the load-bearing platform will be controlled within a limited range and will not be damaged; (4) At least four points of elastic support can be provided for the load-bearing platform. Compared with the three-point support vibration isolation system in foreign countries, it has more support points and the load-bearing capacity of a single support point is relatively smaller, which can reduce the amount of steel used in the load-bearing platform and the bottom foundation. Taking the typical high-altitude platform in the engineering field, the offshore work platform, as an example, the bearing strength requirements of the steel structure of the offshore work platform are lower, which is conducive to improving the stress conditions of the offshore work platform and reducing the construction cost of the offshore work platform; (5) For high-altitude platform steel structures of the same strength, since the bearing points in the anti-sway elastic vibration isolation system of the present invention are more dispersed, it is conducive to placing equipment with larger size and weight, thereby improving the space utilization efficiency of the platform.

[0066] In summary, the anti-sway elastic vibration isolation system of the present invention has good vibration isolation effect, strong anti-sway ability, high stability, relatively more dispersed and uniform load distribution, and low strength requirements for a single support point. It can be widely used in vibration control projects for supporting equipment of offshore or onshore high-altitude platforms 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 equipment is not allowed to sway significantly during earthquakes, including but not limited to power equipment such as motors, compressors, fans, turbines, pumps, hydraulic pump stations, emergency generator sets, air-conditioning units, and also precision equipment such as main control rooms and living area modules. For building protection objects such as main control rooms or living area modules, the building base plate constitutes the bearing platform. The use of the anti-sway elastic vibration isolation system of the present invention can effectively solve the problem of anti-overturning of these building protection objects during earthquakes, which is also one of the beneficial technical effects of the present invention.

[0067] It should be particularly noted that, first, the elastic buffer and the guide plate in the longitudinal limiting structure and the transverse limiting structure described in this example are all integrated into the structure, which is mainly designed from the perspective of improving integrity, simpler installation, and greater safety and reliability. In actual applications, in order to facilitate maintenance and replacement, the elastic buffer and the guide plate can also adopt a detachable connection structure, such as using fasteners, magnetic attraction, convex and concave structure matching, etc., as long as it can effectively prevent accidental falling off during operation, it can also be applied to the present invention; second, in this example, the elastic element is a spiral steel spring as an example for explanation. In actual 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; in addition, the damping elements in the anti-sway elastic vibration isolation system of the present invention can be varied. On the one hand, in the damping element In terms of the type of components, in addition to the viscous damper already mentioned, it can also be other types of damping devices such as eddy current dampers, small hole 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 be applied to the present invention. On the other hand, in terms of the installation position of the damping element, in addition to setting the damping element in the elastic vibration isolation device, the damping element and the elastic vibration isolation device can also be set in parallel between the bearing frame and the bottom foundation, which can also have a good technical effect. Of course, for some elastic elements that have good damping performance themselves, such as some rubber elastomers or polyurethane elastomers, they have both good damping performance and elasticity, so they can also be used as damping elements and elastic elements at the same time; third, the number of vertical limiting structures in the elastic vibration isolation device needs to be designed according to the actual requirements of the project; fourth, according to Figure 15-Figure 21 The technical principle recorded in this example is explained by taking the vertical limit devices in all four elastic vibration isolation devices as an example. To ensure safety, the vertical limit structures should be set in at least three elastic vibration isolation devices in the anti-sway elastic vibration isolation system of the present invention. In practical applications, when the number of elastic vibration isolation devices is four or more than four, of course, vertical limit structures can also be set in five, six or even more elastic vibration isolation devices to ensure the anti-flipping of the load-bearing platform. All of the above are simple changes based on the technical principle of the present invention, which are only explained in words here, and no more drawings are provided one by one. They are all within the protection scope required by the present invention.

[0068] Embodiment 4 like Fig. 22The anti-sway elastic vibration isolation system of the present invention shown in the figure is different from the third embodiment in that it includes a load-bearing platform 1 and six elastic vibration isolation devices, and the six elastic vibration isolation devices are arranged in two rows and three columns, wherein the side where two elastic vibration isolation devices D and one elastic vibration isolation device A are located is a limiting row, and the column where the two elastic vibration isolation devices A located at the lower middle part of the load-bearing platform 1 are located is a limiting column, and only the lateral limiting structures 3 are arranged in the two elastic vibration isolation devices D in the limiting row, and the longitudinal limiting structures 2 are arranged in the two elastic vibration isolation devices A in the limiting column, and the vertical limiting structures are arranged only in the elastic vibration isolation devices corresponding to the four corners of the load-bearing platform 1.

[0069] Compared with the third embodiment, in the technical scheme described in this embodiment, only the transverse limiting structure 3 and the vertical limiting structure are provided in the two elastic vibration isolation devices D of the limiting row, only the longitudinal limiting structure 2 is provided in the two elastic vibration isolation devices A of the limiting row, and only the vertical limiting structure is provided in the other two elastic vibration isolation devices B. 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 provided to support the bearing frame, compared with the three-point support vibration isolation system of foreign countries, it has more support points during operation, which is beneficial to improve the stability of the system, and since the actual bearing capacity of a single support point is relatively smaller, the amount of steel used in the bearing frame and the bottom foundation can be reduced. Taking the offshore work platform, a typical high-altitude platform in the engineering field, as an example, the bearing strength requirements of the steel structure of the offshore work platform are lower, which is beneficial to improving the stress conditions of the offshore work platform and also to reducing the construction cost of the offshore work platform.

[0070] It should be pointed out that in order to ensure that the deformation of the elastic vibration isolation device caused by the thermal expansion and contraction of the load-bearing frame is as balanced as possible, when the number of elastic vibration isolation devices arranged along the lateral direction of the load-bearing frame exceeds two rows, the limit column is set close to the middle of the load-bearing frame. In addition, the row spacing between the two rows of elastic vibration isolation devices arranged along the longitudinal direction of the load-bearing frame should also be as large as possible, so as to better improve the stability of the load-bearing frame. Of course, based on the technical principles of the third embodiment and this example, in order to further improve the reliability of the limit, it is also possible to Fig.23 As shown, the elastic vibration isolation device at the intersection of the limit row and the limit column is specifically an elastic vibration isolation device C. The longitudinal limit structure 2 and the transverse limit structure 3 are simultaneously provided in the elastic vibration isolation device C, which can also achieve a good technical effect. These are simple changes based on the technical principle of the present invention and are also within the protection scope required by the present invention.

[0071] Furthermore, it should be noted that based on the technical principle of this example, Fig. 22 and Fig.23In the figure, the row of elastic vibration isolation devices on the lower side of the load-bearing frame along the longitudinal direction as shown in the figure is selected as the limiting row. In practice, the row on the upper side of the load-bearing frame along the longitudinal direction can also be set as the limiting row. It is only necessary to set a lateral limiting structure 3 in the corresponding elastic vibration isolation device of the limiting row, and the same technical effect can be achieved. This feature is also applicable to other embodiments of the present invention. It is only explained in text here without additional drawings. It is also within the protection scope required by the present invention.

[0072] Embodiment 5 like Fig.24 The anti-sway elastic vibration isolation system of the present invention shown in the figure is different from the fourth embodiment in that it includes a bearing platform 1 and eight elastic vibration isolation devices, and the eight elastic vibration isolation devices are arranged in two rows and four columns, wherein a row including two elastic vibration isolation devices D, one elastic vibration isolation device B and one elastic vibration isolation device A is a limiting row, and a column including two elastic vibration isolation devices A located at the lower left side of the middle part of the bearing platform 1 is a limiting column, and only lateral limiting structures 3 are arranged in the two elastic vibration isolation devices D in the limiting row, and longitudinal limiting structures 2 are arranged in the two elastic vibration isolation devices A in the limiting column, and vertical limiting structures are arranged in the other six elastic vibration isolation devices except the elastic vibration isolation device A.

[0073] Based on the technical principle of this example, the arrangement of the elastic vibration isolation devices in the anti-sway elastic vibration isolation system of the present invention can also be two rows of five columns or even two rows or more columns, and the corresponding number of elastic vibration isolation devices is ten or even more, which can be designed in practice according to engineering needs; in addition, at least two elastic vibration isolation devices in the limiting row can be provided with a lateral limiting structure, and of course, a lateral limiting structure can also be provided in three or four elastic vibration isolation devices in the limiting row; in addition, this example is taken as an example that vertical limiting structures are provided in the other six elastic vibration isolation devices except the elastic vibration isolation device A. It should be pointed out that vertical limiting structures should be provided in at least three elastic isolation devices in the anti-sway elastic vibration isolation system of the present invention to ensure that the flipping amplitude of the load-bearing frame is effectively limited when shaking occurs, and there is no danger of overturning. The three-point limit for the load-bearing frame is only the minimum standard. Fig.24 In the technical solution shown in the figure, in which the load-bearing platform is relatively large in size and the number of elastic vibration isolation devices is relatively large, vertical limiting structures should be provided in more elastic vibration isolation devices to ensure safety. The specific design can be determined based on key parameters such as the size of the load-bearing platform and the weight distribution of the object to be protected. For harsh application conditions such as offshore platforms, it can be preferred that all elastic vibration isolation devices are provided with vertical limiting structures, which can also achieve good technical effects. They are all simple changes based on the technical principles of the present invention and are also within the protection scope required by the present invention.

[0074] Embodiment 6 In the technical solutions shown in the first to fifth embodiments, 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 the rows and columns corresponding to each other neatly. However, in actual applications, due to the large variation in the width of the object to be protected fixed above the support platform or the large difference in the size of the linked equipment, sometimes there is a certain difference in the width of the left and right parts of the support platform. For example, Fig.25 The anti-sway elastic vibration isolation system of the present invention shown in the figure is different from the fifth embodiment in that the bearing platform 1 includes two parts which are integrated and have different widths and heights. Accordingly, three rows of elastic vibration isolation devices are arranged longitudinally below the bearing platform 1, and five rows of elastic vibration isolation devices are arranged transversely below the bearing platform, wherein: Fig.25 The middle load-bearing platform 1 is located at the bottom of the figure and contains the largest number of elastic vibration isolation devices in the row as the limit row. Among the five columns of elastic vibration isolation devices arranged horizontally on the load-bearing platform, the middle column is the limit row. The intersection of the limit row and the limit column is an elastic vibration isolation device C that is equipped with both a horizontal limit structure 3 and a longitudinal limit structure 2. The limit row also includes two other elastic vibration isolation devices D that are equipped with horizontal limit structures 3. The limit column also includes another elastic vibration isolation device A that is equipped with a longitudinal limit structure 2. The remaining positions use elastic vibration isolation devices B that are only equipped with vertical limit structures. Of course, vertical limit structures are set in the elastic vibration isolation devices A, C and D.

[0075] In the technical solution described in this example, the shape of the support frame and the arrangement of the elastic vibration isolators are adjusted according to the different sizes of the equipment, which can better adapt to the layout requirements of the equipment, and is conducive to optimizing the structural solution of the support frame and improving the stability of the system.

[0076] Of course, based on the technical principles of this example, the shape of the load-bearing platform can be varied according to different equipment. In addition, in order to meet the needs of equipment with different weight distributions, the arrangement of the elastic vibration isolation device can also be varied, such as Fig.26 The anti-sway elastic vibration isolation system of the present invention is shown, the bearing platform 1 includes two parts that are integrated, have different widths and the same height, and the elastic vibration isolation devices are arranged in five rows in the horizontal direction of the bearing platform 1, and in the longitudinal direction of the bearing platform, the elastic vibration isolation devices are arranged in five columns. For such technical solutions with more rows and columns of elastic vibration isolation devices, the principle for selecting the limiting row and limiting column is that, preferably, the row with the largest number of elastic vibration isolation devices is selected as the limiting row, and the column with the largest number of elastic vibration isolation devices is selected as the limiting column, for example Fig.26In the figure, a row of three elastic vibration isolation devices is selected as the limiting row on the lower side of the bearing platform 1 as shown in the figure. The three elastic vibration isolation devices of the limiting row are all elastic vibration isolation devices D provided with a lateral limiting structure 3. Among the five columns of elastic vibration isolation devices arranged laterally on the bearing platform, the column with three elastic vibration isolation devices on the far right is used as the limiting column. The three elastic vibration isolation devices A of the limiting column are provided with a longitudinal limiting structure 2, and the remaining positions adopt elastic vibration isolation devices B with only a vertical limiting structure. Of course, vertical limiting structures are provided in the elastic vibration isolation devices A, B, C and D. Another selection principle is that rows and columns of elastic vibration isolation devices with larger sizes and larger numbers can also be selected as limiting rows and limiting columns. The anti-sway elastic vibration isolation system of the present invention with such a structure can also achieve good technical effects. In practice, it can be designed and selected according to the actual needs of the project, and is also within the protection scope required by the present invention.

[0077] Embodiment 7 like Fig. 27 The anti-sway elastic vibration isolation system of the present invention shown in the figure is different from the sixth embodiment in that the bearing platform 1 is composed of three parts of different widths, six rows of elastic vibration isolation devices are arranged in the horizontal direction of the bearing platform, and six columns of elastic vibration isolation devices are arranged in the longitudinal direction of the bearing platform. Among the six columns of elastic vibration isolation devices arranged in the longitudinal direction of the bearing platform, the column located on the right side of the middle is used as a limit column, and the longitudinal limit structures 2 are arranged in the two elastic vibration isolation devices in the limit column. Fig. 27 The middle part of the middle load-bearing platform 1, located on the lower side as shown in the figure, is a limit row, and two elastic vibration isolation devices in the limit row are provided with a lateral limit structure 3, wherein the elastic vibration isolation device located at the intersection of the limit row and the limit row is provided with a longitudinal limit structure 2 and a lateral limit structure 3 at the same time, the remaining elastic vibration isolation devices of the limit row are elastic vibration isolation devices D provided with a lateral limit structure 3, and the remaining elastic vibration isolation devices of the limit row are elastic vibration isolation devices A provided with a longitudinal limit structure 2, and elastic vibration isolation devices B with only a vertical limit structure are used in other positions; vertical limit structures are provided in elastic vibration isolation devices A, C and D.

[0078] Embodiment 8 In order to facilitate the installation and maintenance of each elastic vibration isolation device, a vertical limit structure can be added to all elastic vibration isolation devices to limit the vertical displacement between the upper shell and the lower shell, so that the elastic vibration isolation device has good tensile strength, thereby replacing the vertical limit device to prevent the load-bearing platform from excessive deflection or even tipping. Fig.28 and Fig.29The anti-sway elastic vibration isolation system of the present invention shown in the figure takes the vertical limiting structure arranged in the elastic vibration isolation device B as an example. The difference from the first embodiment is 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 shell 19. The vertical limiting connecting screw 12 is matched with the upper shell 4 through the locking nut 10. A vertical movement space v is respectively arranged between the upper and lower surfaces of the matching parts of the locking nut 10 and the upper shell 4. The elastic element 11 specifically adopts a rubber elastomer. Through the damping provided by the rubber elastomer, the vertical vibration modal damping ratio, lateral swing damping ratio and longitudinal swing damping ratio of the anti-sway elastic vibration isolation system of the present invention all reach 9%.

[0079] The vertical limit structure is provided in all elastic vibration isolation devices, so that the elastic vibration isolation devices have good tensile strength, and can replace the vertical limit device to prevent the load-bearing platform from excessive deflection or even overturning.

[0080] certainly Fig.28 and Fig.29 In the embodiment, the lower shell of the elastic vibration isolation device adopts a plate structure, and the upper shell adopts a box structure. In practical applications, the upper shell can also adopt a plate structure and the lower shell can adopt a box structure. It is only necessary to turn the elastic vibration isolation device over for use. In addition, if Fig.30 As shown in Fig.29 The difference of the technical solution shown is that the vertical limit connecting screw 12 is connected to the lower shell 19 by a detachable threaded structure, and the vertical limit structure can also include an elastic buffer 8, which is arranged between the locking nut 10 and the upper shell 4. The maximum compression 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 shell can be effectively controlled and the upper shell can be quickly reset after being stretched, thereby effectively preventing the elastic element from shifting, jumping or even falling. These are simple changes based on the technical principle of this example, which can also achieve good technical effects and are also within the protection scope required by the present invention.

[0081] Embodiment 9 like Fig.31 and Fig.32The anti-sway elastic vibration isolation system of the present invention shown in the figure is different from the eighth embodiment in that, in the elastic vibration isolation device C, the lower shell 19 also adopts a box-type structure. In addition, the limit baffle 5 in the lateral limit structure and the longitudinal limit structure is located on the outside of the limit support 6. In addition, the vertical limit structure also includes an elastic buffer 8, and the vertical limit connecting screw 12 is fixedly connected to the bottom foundation 17. The vertical limit connecting screw 12 is respectively connected to the upper shell 4 and the lower shell 19 through a locking nut 10. The elastic buffer 8 is specifically a rubber elastomer. The rubber The elastic body is arranged between the locking nut 10 and the upper shell 4 and between the locking nut 10 and the lower shell 19, and the rubber elastic body is respectively adhered and fixed to the surface of the upper shell 4 and the lower shell 19; the sum of the maximum compression deformation of the elastic buffer 8 during operation and the gap v' between the elastic buffer 8 and the upper shell 4 constitutes the vertical movement space of the vertical limit structure on the upper side, and the sum of the maximum compression deformation of the elastic buffer 8 during operation and the gap v' between the elastic buffer 8 and the lower shell 19 constitutes the vertical movement space of the vertical limit structure on the lower side. Accordingly, the lower shell of all elastic vibration isolation devices adopts a box-type structure, and the limit baffle in the longitudinal limit structure in the elastic vibration isolation device A and the lateral limit device in the elastic vibration isolation device D are also located on the outside of the limit support, and all elastic vibration isolation devices are provided with a vertical limit structure.

[0082] In the technical solution described in this example, the upper shell and the lower shell of the elastic vibration isolation device are both box-type structures, which have stronger bending resistance and are conducive to maintaining the stability of the load-bearing platform. Fig.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 shell 4 and the gap between the locking nut 10 and the lower shell 19. At this time, the maximum compression deformation of the elastic buffer 8 during work is the vertical movement space of the vertical limiting structure, which is also within the protection scope required by the present invention.

[0083] Embodiment 10 Based on the technical principle described in Example 9, Fig.34 The anti-sway elastic vibration isolation system of the present invention is shown in FIG. Fig.10 The difference of the technical solution is that the vertical limiting device also includes an elastic buffer 8, which includes a plurality of metal disc springs arranged in series. The elastic buffer 8 is arranged between the locking nut 10 and the supporting platform 1 and maintains direct contact with the locking nut and the supporting platform. The maximum compression deformation of the elastic buffer during operation constitutes the vertical movement space.

[0084] and Fig.10Compared with the above technical solutions, in the anti-sway elastic vibration isolation system of the present invention, since an elastic buffer is added, when the support frame shakes, the locking nut will not directly collide with the support frame, and the force between the two is buffered by the elastic buffer before being transmitted to each other, which can effectively protect the vertical limit device and the support frame from damage, and is conducive to improving the service life of the system. Of course, when designing and calculating such technical solutions, it is also necessary to consider the influence of the stiffness of the elastic buffer on the natural frequency of the vibration isolation system.

[0085] based on Fig.34 The technical principle of the technical solution shown is as follows: Fig.35 As shown, the elastic buffer 8 is a polyurethane elastic pad, and the elastic buffer body 8 is glued and fixed on the surface of the bearing platform 1. The elastic buffer is arranged between the locking nut 10 and the bearing platform 1 and only occupies part of the gap between the locking nut and the bearing platform. 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 bearing platform constitutes the vertical movement space; in addition, the limit connection screw 22 and the bottom foundation 17 are also fixedly connected by a detachable threaded structure. These are simple changes based on the technical principle of the present invention, which can also achieve good technical effects and are also within the protection scope required by the present invention.

[0086] The embodiments of the present invention are only for better illustrating the technical solutions of the present invention and should not be regarded as limitations of the present invention. The technical features in many embodiments may also be used interchangeably. Based on the technical principles of the present invention, those skilled in the art may re-combine the technical solutions described in the above embodiments or simply replace some of the components therein with similar technologies. As long as they are based on the technical principles of the present invention, they are all within the protection scope required by the present invention.

Claims

1. An anti-sway elastic vibration isolation system, comprising a bearing frame and an elastic vibration isolation device, wherein the elastic vibration isolation device is located between the bearing frame and the bottom foundation, and is characterized in that: The elastic vibration isolation device comprises an upper shell, an elastic element and a lower shell, wherein the elastic element is located between the upper shell and the lower shell, the upper shell is firmly connected to the bearing platform, 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 load-bearing platform, and the elastic vibration isolation devices of each row are arranged along the longitudinal direction of the load-bearing platform, wherein one row includes at least two elastic vibration isolation devices and a transverse limiting structure is arranged in at least two elastic vibration isolation devices in the row, forming a limiting row; the elastic vibration isolation devices of each column are arranged along the transverse direction of the load-bearing platform, wherein one column includes at least two elastic vibration isolation devices and a longitudinal limiting structure is arranged in at least two elastic vibration isolation devices in the column, forming a limiting column; at least three elastic vibration isolation devices are provided with a vertical limiting structure or at least three vertical limiting devices are arranged between the load-bearing platform and the bottom foundation.

2. The anti-sway elastic vibration isolation system according to claim 1, characterized in that: The elastic vibration isolation device located at the intersection of the limit row and the limit column is provided with a longitudinal limit structure and a transverse limit structure at the same time.

3. The anti-sway elastic vibration isolation system according to claim 1, characterized in that: The longitudinal limiting structure and the transverse limiting structure both include a limiting baffle and a limiting support. The limiting baffle is fixedly arranged on the upper shell of the elastic vibration isolation device, and the limiting support is fixedly arranged on the lower shell. A longitudinal movement space is arranged between the limiting baffle and the limiting support of the longitudinal limiting structure, and a transverse movement space is arranged between the limiting baffle and the limiting support of the transverse limiting structure.

4. The anti-sway elastic vibration isolation system according to claim 3, characterized in that: The longitudinal limiting structure and the transverse limiting structure also include an elastic buffer, which is fixed on a limiting baffle or a 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 constitute the longitudinal movement space or the transverse movement space.

5. The anti-sway elastic vibration isolation system according to claim 3, characterized in that: The lateral movement space is larger than the maximum displacement between the upper shell and the lower shell in the lateral direction of the bearing platform when the object to be protected on the bearing platform is working normally, and is smaller than the maximum displacement allowed between the upper shell and the lower shell in the lateral direction of the bearing platform when the displacement of the object to be protected and the pipeline is kept within the allowable range under the bottom foundation shaking condition; the longitudinal movement space is larger than the maximum displacement between the upper shell and the lower shell in the longitudinal direction of the bearing platform when the object to be protected on the bearing platform is working normally, and is smaller than the maximum displacement allowed between the upper shell and the lower shell in the longitudinal direction of the bearing platform when the displacement of the object to be protected and the pipeline is kept within the allowable range under the bottom foundation shaking condition.

6. The anti-sway elastic vibration isolation system according to claim 3, characterized in that: The longitudinal limiting structure also includes a buffer guide, which includes an elastic buffer and a guide push plate. An adjusting screw and a locking nut are fixedly arranged on the guide push 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 matched with the limiting baffle through the elastic buffer. The maximum compression deformation of the elastic buffer during work, or the sum of the maximum compression deformation of the elastic buffer during work and the gap between the elastic buffer and the limiting baffle constitutes the longitudinal movement space.

7. The anti-sway elastic vibration isolation system according to claim 1, characterized in that: The lateral limiting structure also includes a buffer guide, which includes an elastic buffer and a guide push plate. An adjusting screw and a locking nut are fixedly arranged on the guide push 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 matched with the limiting baffle through the elastic buffer. The maximum compression deformation of the elastic buffer during work, or the sum of the maximum compression deformation of the elastic buffer during work and the gap between the elastic buffer and the limiting baffle constitutes the lateral movement space.

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

9. The anti-sway elastic vibration isolation system according to claim 1, characterized in that: The vertical limit structure includes a vertical limit connecting screw, an upper limit assembly, a lower limit assembly and a locking nut. The upper limit assembly includes an upper limit part and an upper elastic buffer part that are integrated. The lower limit assembly includes a lower limit part and a lower elastic buffer part that are integrated. The lower part of the vertical limit connecting screw is fixedly connected to the lower shell or the bottom foundation. The upper limit part and the lower limit part are connected to the connecting screw through a threaded structure. The upper part of the vertical limit connecting screw passes through the lower limit assembly, the upper shell and the upper limit assembly from bottom to top in sequence. In the static load state, vertical movement space is provided between the upper limit assembly and the upper shell, and between the lower limit assembly and the upper shell.

10. The anti-sway elastic vibration isolation system according to claim 9, characterized in that: The threaded structure is a locking nut integrally arranged on the upper limit member and the lower limit member.

11. The anti-sway elastic vibration isolation system according to 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 shell or the bottom foundation. The vertical limiting connecting screw is connected to the upper shell and / or the lower shell through the locking nut. A vertical moving space is provided between the locking nut and the upper shell and / or the lower shell.

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

13. The anti-sway elastic vibration isolation system according to claim 1, characterized in that: The vertical limit device includes a limit connecting screw and a locking nut. The lower part of the limit connecting screw is fixedly connected to the bottom foundation, and the upper part of the limit connecting screw is connected to the supporting frame through the locking nuts respectively arranged on both sides of the corresponding supporting frame. Vertical movement space is respectively arranged between the locking nut and the supporting frame.

14. The anti-sway elastic vibration isolation system according to claim 13, characterized in that: The vertical limiting device also includes an elastic buffer, which is arranged between the locking nut and the supporting 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 supporting frame constitutes the vertical movement space.

15. The anti-sway elastic vibration isolation system according to any one of claims 9, 11, 12, 13 or 14, characterized in that: The vertical movement space is larger than the maximum vertical displacement between the upper shell and the lower shell on the load-bearing platform when the object to be protected on the load-bearing platform is working normally, and is smaller than the maximum vertical displacement between the upper shell and the lower shell on the load-bearing platform when the displacement of the object to be protected and the pipeline remains within the allowable range under the condition of bottom foundation shaking.

16. The anti-sway elastic vibration isolation system according to claim 1, characterized in that: The elastic vibration isolation device further comprises a damping element, and the damping element is arranged between the upper shell and the lower shell.

17. The anti-sway elastic vibration isolation system according to claim 1, characterized in that: The elastic vibration isolation device also includes a damping element, which is arranged in parallel with the elastic vibration isolation device between the bearing platform and the bottom foundation. The vertical vibration mode damping ratio and the swing mode damping ratio of the anti-sway elastic vibration isolation system are between 8% and 30%.

18. The anti-sway elastic vibration isolation system according to claim 16 or 17, characterized in that: The damping element includes a viscous damper, an eddy current damper, a small hole throttling damper, an elastic rubber damper or an elastic polyurethane damper.

19. The anti-sway elastic vibration isolation system according to claim 1, characterized in that: The elastic element includes a spiral 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 according to claim 1, characterized in that: When the number of elastic vibration isolation devices arranged in the transverse direction of the bearing platform exceeds two rows, the position limiting row is arranged close to the middle of the bearing platform.

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