Adaptive double-layer vibration isolation support for electric reactor

Abstract

The present application relates to a kind of electric reactor adaptive double-layer vibration isolation support, including damping vibration isolation pad, I-shaped section steel, bottom plate, variable stiffness system, top plate from bottom to top are connected in turn, top plate is equipped with electric reactor equipment, vibration monitoring device and stiffness calculation device;Variable stiffness system includes stiffness coarse adjustment system, stiffness fine adjustment system and shear jack system;Stiffness coarse adjustment system is by vertically arranged and length is arranged according to echelon stiffness coarse adjustment spring, stiffness fine adjustment system includes horizontally arranged longitudinal cylindrical helical body spring, changes the horizontal and vertical end point distance of shear jack by motor drive torsion multiplier and worm mechanism, adjusts the type and compression and tensile length of spring involved in vibration control.Compared with prior art, the present application realizes the accurate, efficient adaptive adjustment of support vibration isolation stiffness, overcomes the limitation that different electric reactor equipment needs to be designed separately in the original technology vibration isolation support has the advantages such as.

Description

Technical Field

[0001] This invention relates to the technical field of vibration isolation devices, and in particular to a reactor adaptive double-layer vibration isolation support. Background Technology

[0002] In attached substations, various electrical equipment is usually installed directly on the floor slab. When these electrical devices are in operation, they will generate vibration and noise problems. The vibration and noise can then be transmitted to other rooms in the building through structural components such as beams and columns, causing widespread vibration and noise pollution problems.

[0003] Reactors are one of the most important electrical equipment in attached substations, but their unique structure results in significant vibration and noise levels during operation. The vibration of the reactor is primarily caused by the vibration of its internal core. When the reactor is running, the core, made of magnetic silicon steel sheets, undergoes two periodic contractions within one current cycle. When the AC frequency is typically 50Hz, the vibration generated by the reactor exhibits a distinctly concentrated spectral characteristic, focusing on 100Hz and its harmonics. The vibration component at 100Hz is significantly stronger than those at other frequencies.

[0004] Reactor equipment generates significant vibration and noise pollution during operation, requiring control. Installing vibration isolation supports is an ideal method, offering advantages such as low cost and effective vibration and noise control. Double-layer vibration isolation supports, a type of support, consist of an upper spring isolation layer, a middle mass block, and a lower damping isolation layer. They are highly effective in controlling high-frequency vibrations and structural sound propagation, making them suitable for use as vibration isolation supports for reactor equipment.

[0005] There are many types of reactor equipment, and different types of reactors have significant differences in equipment quality and vibration characteristics. Therefore, it is difficult to achieve good results with a single-parameter vibration isolation support. Designing independent vibration isolation supports for different reactors will significantly increase time and economic costs.

[0006] Utility model CN217898624U discloses a high-frequency vibration isolation device for reactors, comprising a top plate and a bottom plate arranged in parallel. High-damping vibration isolation pads are installed at the four corners of the upper surface of the top plate, and the reactor equipment is placed on the upper surface of the high-damping vibration isolation pads. The middle of the lower surface of the top plate is connected to the middle of the upper surface of the bottom plate by a viscous shear damper. A cylindrical helical spring is installed between the top plate and the bottom plate at the position corresponding to the high-damping vibration isolation pad. When the structural parameters of the device are fixed, the device can only achieve the optimal vibration isolation effect for a specific reactor equipment, lacking the ability to flexibly adjust the stiffness according to the reactor equipment vibrating at different frequencies. In addition, the high-damping vibration isolation pads first isolate high-frequency vibrations, increasing the wear and tear of the isolation pads and affecting the service life of the device. Summary of the Invention

[0007] The purpose of this invention is to overcome the shortcomings of the prior art and provide a double-layer vibration isolation support for reactors that can adaptively change the support stiffness according to the vibration characteristics of the reactor equipment, thereby meeting the vibration isolation requirements of different types of reactors, and has low loss and long service life.

[0008] The objective of this invention can be achieved through the following technical solutions:

[0009] According to one aspect of the present invention, an adaptive double-layer vibration isolation support for a reactor is provided, comprising, from bottom to top, a damping vibration isolation pad, an I-shaped section steel, a base plate, a variable stiffness system, and a top plate, wherein a reactor device is mounted on the top plate; the variable stiffness system includes a coarse stiffness adjustment system, a fine stiffness adjustment system, and a scissor jack system; the coarse stiffness adjustment system includes multiple coarse stiffness adjustment springs of different lengths, the upper ends of which are fixedly connected to the lower surface of the top plate and perpendicular to the upper surface of the top plate; the fine stiffness adjustment system includes a longitudinal cylindrical helical spring located above the base plate and parallel to the upper surface of the base plate; the scissor jack system connects the base plate and the top plate and connects the two ends of the longitudinal cylindrical helical spring, for changing the distance between the base plate and the top plate, and changing the number of coarse stiffness adjustment springs and the length of the longitudinal cylindrical helical springs that enter the working position.

[0010] Furthermore, the scissor jack system includes an upper guide rod, an upper connector, a first support rod, a second support rod, a middle connecting rod, a first sliding rod, a second sliding rod, an upper connecting rod, a longitudinal side plate, a transverse side plate, a torque multiplier, and a motor;

[0011] The upper guide rod passes through the upper connector and the top plate and is parallel to the long axis of the top plate; one end of the second support rod is connected to the upper connector and the other end is connected to the second sliding rod; one end of the first support rod is connected to the top plate through the upper connecting rod and the other end is connected to the first sliding rod; the first sliding rod and the second sliding rod are movably connected to the transverse side plate, and the first support rod and the second support rod are movably connected through the middle connecting rod.

[0012] Furthermore, the upper end of the first support rod is provided with an upper connecting member hinge groove, and the first support rod is hinged to the upper connecting rod and the top plate through the upper connecting rod hinge groove; the lower end of the first support rod is provided with a first sliding rod hinge groove, and the first support rod is hinged to the first sliding rod through the first sliding rod hinge groove; the middle of the first support rod is provided with a first middle connecting rod fixing groove, and the first support rod is hinged to the middle connecting rod and the second support rod through the first middle connecting rod fixing groove; a first support rod spring is provided between the upper connecting rod hinge groove and the first middle connecting rod fixing groove of the first support rod, and the two ends of the first support rod spring are fixedly connected to the first support rod;

[0013] The upper end of the second support rod is provided with an upper connecting member hinge groove, and the second support rod is hinged to the upper connecting member through the upper connecting member hinge groove; the lower end of the second support rod is provided with a second sliding rod hinge groove, and the second support rod is hinged to the second sliding rod through the second sliding rod hinge groove; the middle of the second support rod is provided with a second middle connecting rod fixing groove, and the second support rod is hinged to the middle connecting rod and the first support rod through the second middle connecting rod fixing groove.

[0014] Furthermore, the longitudinal side plate is a cuboid plate structure, and the inner side of the plate structure is provided with a longitudinal side plate reserved sliding groove. The longitudinal side plate reserved sliding groove is a T-shaped cross-section groove that runs through both ends; the longitudinal side plate is fixed to the base plate by welding.

[0015] Furthermore, the first sliding rod includes a first sliding rod sliding block, a first sliding rod fixing block, and a worm gear. The first sliding rod fixing block is a rectangular cross-section rod located in the middle of the first sliding rod, and the first sliding rod sliding block is a cuboid slider located at both ends of the first sliding rod. The first sliding rod fixing block and the first sliding rod sliding block are connected by a circular cross-section rod. The worm gear extends vertically outward from the central rectangular cross-section rod. The cuboid slider is embedded in a pre-reserved sliding groove in the longitudinal side plate and slides longitudinally within the pre-reserved sliding groove in the longitudinal side plate.

[0016] The second sliding rod is provided with a second sliding rod sliding block and a second sliding rod fixing block. The second sliding rod fixing block is located in the middle of the second sliding rod, and the second sliding rod sliding block is located at both ends of the second sliding rod. The second sliding rod sliding block is embedded in the reserved sliding groove of the longitudinal side plate and slides longitudinally within the reserved sliding groove of the longitudinal side plate.

[0017] Furthermore, the transverse side plate is a cuboid structure with a threaded through hole in the center; the transverse side plate is fixed to the base plate by welding.

[0018] Furthermore, the worm gear passes through the threaded through-hole of the transverse side plate and connects to a torque multiplier, which is driven by a motor.

[0019] Furthermore, the support also includes a vibration monitoring device and a stiffness calculation device, which are installed on the top plate. The vibration monitoring device is connected to the stiffness calculation device, and the stiffness calculation device is connected to the motor.

[0020] Furthermore, the top plate is provided with a top plate fixing block, which is a protruding area in the middle of the lower surface of the top plate. Circular rotating seats are arranged on the top plate fixing block. The stiffness coarse adjustment springs are installed on the circular rotating seats in a manner from shortest to longest from the middle to both ends. A circular base is provided on the bottom plate opposite to the longest stiffness coarse adjustment spring. The longest stiffness coarse adjustment spring is fixedly connected to the circular base on the bottom plate.

[0021] Furthermore, the number of damping vibration isolation pads is the same as that of the I-beam section steel. The upper part of the I-beam section steel is connected to the base plate, the upper part of the damping vibration isolation pads is connected to the I-beam section steel, and the bottom of the damping vibration isolation pads is fixedly connected to the floor slab through connectors. The variable stiffness system is installed on the base plate.

[0022] Compared with the prior art, the present invention has the following advantages:

[0023] 1. This invention designs a variable stiffness system between the base plate and the top plate where the reactor equipment is installed, including a coarse stiffness adjustment system, a fine stiffness adjustment system, and a scissor jack system. The coarse stiffness adjustment system consists of vertically arranged coarse stiffness adjustment springs with lengths set in a stepped manner. The fine stiffness adjustment system includes horizontally arranged longitudinal cylindrical helical springs. By driving a torque multiplier and a worm gear mechanism through a motor, the distance between the horizontal and vertical endpoints of the scissor jacks is changed, and the type and compression and extension lengths of the springs involved in vibration control are adjusted. This achieves precise and efficient adjustment of the vibration isolation stiffness of the support, overcoming the limitation of the original technology that different reactor equipment requires separate design of vibration isolation supports.

[0024] 2. The present invention installs a vibration monitoring device and a stiffness calculation device on the top plate of the equipment where the reactor is installed, so as to realize the automatic adjustment of the vibration isolation stiffness of the support according to the working conditions and have the self-adaptability of the vibration isolation support.

[0025] 3. The present invention adjusts the position of the damping vibration isolation pad 1, so that the damping vibration isolation pad 1 can work in an environment with low vibration intensity of high frequency vibration load, thereby reducing the wear and tear of the damping vibration isolation pad and improving the service life of the support.

[0026] 4. This invention has a compact and simple structure with low installation requirements. It can be directly applied to various types of reactor equipment without the need for separate vibration isolation support design. Furthermore, all components can be standardized and manufactured in the factory, overcoming the limitations of traditional reactor vibration isolation supports that require custom production. This reduces the economic cost of installing reactor vibration isolation supports and significantly reduces the time cost required for reactor vibration isolation work. Attached Figure Description

[0027] Figure 1 A schematic diagram of the overall adaptive double-layer vibration isolation support for the reactor;

[0028] Figure 2 Top view of the adaptive double-layer vibration isolation support for the reactor;

[0029] Figure 3 A schematic diagram of a variable stiffness system for an adaptive double-layer vibration isolation support for a reactor;

[0030] Figure 4 This is a schematic diagram of the first support rod in a variable stiffness system.

[0031] Figure 5This is a schematic diagram of the second support rod in a variable stiffness system.

[0032] Figure 6 This is a schematic diagram of the first sliding rod in a variable stiffness system.

[0033] Figure 7 This is a schematic diagram of the second sliding rod in a variable stiffness system;

[0034] Figure 8 This is a schematic diagram of the longitudinal side plate;

[0035] Figure 9 This is a schematic diagram of the transverse side panel;

[0036] Figure 10 A schematic diagram of the upper part of the adaptive double-layer vibration isolation support for the reactor;

[0037] Figure 11 This is a schematic diagram illustrating the principle of stiffness fine-tuning in a variable stiffness system.

[0038] In the diagram, 1-damping vibration isolation pad, 2-I-shaped steel section, 3-base plate, 4-longitudinal side plate, 401-longitudinal side plate with reserved sliding groove, 5-transverse side plate, 501-transverse side plate with reserved worm gear opening, 6-torque multiplier, 7-motor, 8-first support rod, 801-first sliding rod hinge groove, 802-first middle connecting rod fixing groove, 803-first support rod spring, 804-upper connecting rod hinge groove, 9-second support rod, 901-second sliding rod hinge groove, 902-second middle connecting rod fixing groove 903-Upper connecting piece hinge slot, 10-Stiffness coarse adjustment spring, 11-Upper connecting piece, 12-Upper guide rod, 13-Top plate, 1301-Top plate side plate, 1302-Top plate connecting block, 130101-Upper guide rod connecting slot, 130201-Upper connecting rod connecting slot, 130202-Circular rotating seat, 14-Vibration monitoring device, 15-Stiffness calculation device, 16-First sliding rod, 1601-First sliding rod sliding block, 1602-First sliding rod fixing block, 1603-Worm gear, 17-Middle connecting rod, 18-Second sliding rod, 1801-Second sliding rod sliding block, 1802-Second sliding rod fixing block, 19-Longitudinal cylindrical helical spring, 20-Upper connecting rod. Detailed Implementation

[0039] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.

[0040] The adaptive double-layer vibration isolation support for reactors proposed in this invention has adaptive properties, such as... Figure 1 As shown, the adaptive double-layer vibration isolation support for this reactor includes, from bottom to top, a damping vibration isolation pad 1, an I-shaped cross-section steel mass block 2, a base plate 3, a variable stiffness system, a top plate 13, a vibration monitoring device 14 for the reactor, and a stiffness calculation device 15. The top plate 13 is a rectangular plate structure, on which the reactor equipment is mounted. The vibration monitoring device 14 and the stiffness calculation device 15 are also mounted on the top plate 13.

[0041] In a preferred embodiment, the damping vibration isolation pad 1 can be made of neoprene rubber, polyurethane, or cork. The number and size of the damping vibration isolation pad 1 are determined based on the reactor size, and its bottom is fixedly connected to the floor slab via connectors. In this embodiment, four damping vibration isolation pads 1 and I-beam steel sections 2 are arranged side by side. Due to its high internal damping characteristics, the damping vibration isolation pad 1 has a good effect on controlling secondary noise in the structure, reducing the noise impact of the reactor operation on the building's internal environment. The upper part of the damping vibration isolation pad 1 is connected to the I-beam steel section 2, which acts as a mass block. The upper part is connected to the base plate 3. To facilitate the connection between the mass block and the base plate 3 and reduce the difficulty of support installation, it is recommended that the base plate 3 be made of steel. A variable stiffness system is installed on the base plate 3. The variable stiffness system can control the main high-frequency vibration components generated during reactor operation, significantly reducing the high-frequency vibration components transmitted to the damping vibration isolation pad, and improving the service life of the damping vibration isolation pad.

[0042] refer to Figure 2 As shown, a top plate 13 is installed on the variable stiffness system, and the reactor equipment is placed on the top plate 13. A vibration monitoring device 14 is set on the top plate near the reactor equipment. The vibration data of the reactor equipment is transmitted to the stiffness calculation device 15 through the data transmission line. After the target stiffness is calculated, it is transmitted to the motor 7 for the variable stiffness adaptive process.

[0043] In this embodiment, the scissor jack system comprises an upper guide rod 12, an upper connector 11, a first support rod 8, a second support rod 9, a middle connecting rod 17, a first sliding rod 16, a second sliding rod 18, a longitudinal side plate 4, a transverse side plate 5, a torque multiplier 6, and a motor 7. The upper guide rod 12 passes through the upper guide rod connecting groove 16 and passes through the top plate 13, with both ends bolted to both sides of the top plate 13. The upper connector 11 has a longitudinal hole at the top and a transverse hole at the bottom. The upper part of the upper connector 11 is connected to the upper guide rod 12 and can slide freely along the upper guide rod 12, while the lower part is hinged to the second support rod 9 via bolts. The upper part of the upper connector 11 is limited on the upper guide rod 12, and the upper connector 11 can only slide longitudinally on the upper guide rod 12. Therefore, the second support rod 9, which is connected to the lower part of the upper connector 11, can only move in the longitudinal plane.

[0044] The first support rod 8 has openings at the top, middle, and bottom. Near the top, it has a groove 804 for connecting the upper rod, where a cylindrical helical spring 803 is installed. Both ends of the cylindrical helical spring 803 are fixed to the support rod. The top of the first support rod 8 is bolted to the top plate 13. The middle of the first support rod 8 is connected to the second support rod 9 via a middle connecting rod 17, with both ends of the middle connecting rod 17 bolted to both the first and second support rods 8. The bottom of the first support rod 8 has an opening and is bolted to the first sliding rod 16. The second support rod 9 has openings at the top, middle, and bottom. The top is bolted to the upper connecting piece 11, the middle is connected to the first support rod 8 via the middle connecting rod 17, and the bottom is bolted to the second sliding rod 16.

[0045] In this embodiment, the first sliding rod 16 is a rod component consisting of a cuboid rod with a first sliding rod fixing block 1602 in the middle, cuboid sliders at both ends, and a cylindrical rod connecting the two ends to the middle. A cylindrical worm gear 1603 extends outward from the middle cuboid rod. The first sliding rod slider 1601 is embedded in the longitudinal side plate 4, allowing the slider to slide longitudinally within the groove of the longitudinal side plate 4. The cylindrical worm gear 1603 protrudes outward from the worm gear opening 501 in the transverse side plate 5, and its free end is connected to a torque multiplier 6. The second sliding rod 16 is a rod component consisting of a cuboid rod with a second sliding rod slider 1801 in the middle, cuboid sliders at both ends, and a cylindrical rod connecting the two ends to the middle. The second sliding rod slider 1801 is embedded in the longitudinal side plate 4, allowing the slider to slide longitudinally within the reserved sliding groove 401 in the longitudinal side plate.

[0046] Figures 3-9The overall structural arrangement of the variable stiffness system and the structure of some complex components are shown. The longitudinal side plate 4 is a cuboid plate structure with a grooved longitudinal side plate reserved sliding groove 401 inside. The longitudinal side plate 4 is connected to the base plate 3. The first sliding rod sliding block 1601 and the second sliding rod sliding block 1801 are embedded in the reserved sliding groove 401 of the longitudinal side plate and can slide freely along the longitudinal direction. The two ends of the longitudinal cylindrical helical spring 19 are fixed to the second sliding rod fixing blocks 1802 on both sides.

[0047] In a preferred embodiment, the longitudinal side plate has a T-shaped groove 401 for reserving a sliding groove, which allows the sliding rod to slide freely within the longitudinal side plate 4 while restricting the sliding rod to slide only along the longitudinal direction of the support. The longitudinal side plate 4 is fixed to the base plate 3 by welding.

[0048] In this embodiment, the transverse side plate 5 is a cuboid structure with a threaded hole in the center, and the worm gear 1603 on the first sliding rod 16 passes through the threaded hole. The transverse side plate 5 is fixed to the base plate 3 by welding.

[0049] In this embodiment, the torque multiplier 6 is fixed to the free end of the worm gear 1603 on the first sliding rod 16, and the motor 7 is connected to the torque multiplier 6. The motor 7 can apply torque to the torque multiplier 6 and thus apply torque to the worm gear 1603.

[0050] In this embodiment, the first support rod 8 and the second support rod 9 are respectively hinged to the sides of the first sliding rod fixing block 1602 and the second sliding rod fixing block 1702 via hinge grooves 801 and 901, respectively, using nuts. The middle portions of adjacent first support rods 8 and second support rods 9 are connected via a middle connecting rod 17, using the first middle connecting rod fixing groove 802 and the second middle connecting rod fixing groove 902 as connection points. The middle connecting rod 17 is hinged to both the first support rod 8 and the second support rod 9. The upper part of the first support rod 8 is hinged to the upper connecting rod 20 via the upper connecting rod hinge groove 804, and the upper connecting rod 20 is fixed inside the top plate 13 via the upper connecting rod connecting groove 130201. The upper part of the second support rod 9 is hinged to the upper connecting member 11 via bolts, using the upper connecting member hinge groove 903 as the connection point.

[0051] In a preferred embodiment, the first support rod spring 803 can be a type of spring with good stability and a certain deformation capacity, such as a disc spring, wave spring, or mold spring. With the first support rod spring 803 installed, the variable stiffness system can have a certain degree of vertical deformation capacity when subjected to reactor vibration loads, preventing the first support rod 8 and the second support rod 9 from bearing excessive force, which could lead to damage to the first support rod 8 and the second support rod 9, or failure of the variable stiffness system's variable stiffness capability due to unreasonable stiffness distribution.

[0052] In a preferred embodiment, all components involved in the variable stiffness system are arranged symmetrically on the left and right sides of the support to ensure the system's working efficiency and mechanical balance.

[0053] In this embodiment, the top plate 13 has top plate side plates 1301 on both sides and a raised top plate fixing block 1302 in the middle area. The upper guide rod 12 passes through the top plate side plates 1301 and the top plate fixing block 1302, and the two ends of the upper guide rod 12 are fixed to the top plate side plates 1301 by bolts.

[0054] In this embodiment, a number of circular rotating seats 130202 are provided on the top plate fixing block 1302, and a stiffness coarse adjustment spring 10 is provided at the corresponding position of the circular rotating seat. This design can quickly limit the stiffness coarse adjustment spring 10 and improve the stability of the stiffness coarse adjustment spring 10 in use.

[0055] In a preferred embodiment, the stiffness coarse adjustment spring 10 consists of multiple springs of varying lengths, made of silicon manganese steel, ensuring stability during use. With the center point of the top plate fixing block 1302 as the origin, the bottom surface of the top plate fixing block is divided into four quadrants along longitudinal and transverse axes. Circular rotating seats 130202 are installed on the outer side of each quadrant, with the same number of circular rotating seats 130202 in each quadrant. The stiffness coarse adjustment springs 10 are installed on each circular rotating seat 130202 in a pattern where their length gradually increases from the inside out. The outermost stiffness coarse adjustment spring 10 has a length greater than the maximum height of the variable stiffness layer during operation. A circular rotating seat is positioned at the projection location of the outermost stiffness coarse adjustment spring 10 on the base plate 3, with the bottom of the spring mounted on this circular rotating seat, ensuring that the outermost spring is always under force, providing sufficient load-bearing capacity for the support.

[0056] In a preferred embodiment, two pairs of the longest stiffness coarse adjustment springs 10 are provided on the outermost side of the top plate fixing block 1302, two pairs of the shortest stiffness coarse adjustment springs 10 are provided on the innermost side of the top plate fixing block 1302, and two pairs of intermediate-length stiffness coarse adjustment springs 10 are provided between the longest and shortest stiffness coarse adjustment springs 10. Figure 10 As shown.

[0057] The operating principle of the adaptive reactor vibration isolation double-layer support is as follows:

[0058] During the operation of the reactor equipment, the stiffness calculation device 15 calculates the target stiffness of the support, determines the height of the variable stiffness layer based on the target stiffness value, and issues a variable stiffness command to the variable stiffness system. After receiving the variable stiffness command, the motor rotates at the power end to generate torque, which is amplified by the torque multiplier 6 and applied to the worm gear 1603. The worm gear 1603 then rotates and generates longitudinal movement, causing a change in the overall height of the variable stiffness system. Due to the change in the variable stiffness system, the stiffness coarse adjustment spring 10 will sequentially enter or exit the working state according to its length, thereby realizing the stiffness coarse adjustment operation in the variable stiffness function of this invention.

[0059] The overall stiffness of the support is related not only to the number of service stiffness coarse adjustment springs 10, but also to the relative distance between the bottoms of the first support rod 8 and the second support rod 9, such as... Figure 11 As shown, a system is formed by the first support rod 8 and the second support rod 9. When the reactor top plate 3 is subjected to the reactor vibration load F(t), the top plate 3 will generate a displacement of... Figure 11 At the position indicated by the dashed line, the displacement is Δh. At this point, the support stiffness k can be expressed as k = F / Δh. The longitudinal cylindrical helical spring 19 will also produce a corresponding horizontal displacement, and the cylindrical helical spring 19 will deform to... Figure 11 At the position indicated by the dashed line, there is a displacement of Δl. Clearly, there is a geometric relationship between the displacement Δh and Δl. The deformation Δl of the cylindrical helical spring 19 is related to the force acting upon it, according to... Figure 11 The schematic diagram of the force system shown shows that, according to the equilibrium relationship, the force on the cylindrical helical spring 19 is related to the distance l between the bottom of the first support rod 8 and the bottom of the second support rod 9. Therefore, by adjusting this distance, the internal force of the cylindrical helical spring 19 can be changed when the top plate 13 is subjected to a certain reactor vibration load, thereby changing the deformation Δl of the cylindrical helical spring 19 and the displacement Δh of the top plate 3, thus changing the stiffness of the variable stiffness system and achieving the purpose of stiffness fine adjustment.

[0060] Based on the above principles, during the stiffness fine-tuning stage, while ensuring that the number of stiffness coarse-tuning springs 10 in service remains unchanged, the motor 7 applies torque, which is amplified by the torque multiplier 6 and applied to the worm gear 1603. The worm gear 1603 undergoes a small displacement, which drives the first support rod 8 to move in the longitudinal plane, adjusting the height of the variable stiffness system, thereby achieving the purpose of finely adjusting the support stiffness.

[0061] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in the present invention, and these modifications or substitutions should all be covered within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A reactor adaptive double-layer vibration isolation support, characterized in that, The structure includes, from bottom to top, a damping vibration isolation pad (1), an I-beam section steel (2), a base plate (3), a variable stiffness system, and a top plate (13). A reactor is installed on the top plate (13). The variable stiffness system includes a coarse stiffness adjustment system, a fine stiffness adjustment system, and a scissor jack system. The coarse stiffness adjustment system includes multiple coarse stiffness adjustment springs (10) of different lengths. The upper end of each coarse stiffness adjustment spring (10) is fixedly connected to the lower surface of the top plate (13). The coarse stiffness adjustment spring (10) and the top plate (13) are connected in sequence. 3) The upper surface is perpendicular. The stiffness fine adjustment system includes a longitudinal cylindrical helical spring (19). The longitudinal cylindrical helical spring (19) is located above the base plate (3) and parallel to the upper surface of the base plate (3). The scissor jack system connects the base plate (3) and the top plate (13) and connects the two ends of the longitudinal cylindrical helical spring (19) to change the distance between the base plate (3) and the top plate (13) to change the number of stiffness coarse adjustment springs (10) and the length of the longitudinal cylindrical helical spring (19) entering the work. The scissor jack system includes an upper guide rod (12), an upper connector (11), a first support rod (8), a second support rod (9), a middle connecting rod (17), a first sliding rod (16), a second sliding rod (18), an upper connecting rod (20), a longitudinal side plate (4), a transverse side plate (5), a torque multiplier (6), and a motor (7). The upper guide rod (12) passes through the upper connector (11) and the top plate (13) and is parallel to the long axis of the top plate (13); one end of the second support rod (9) is connected to the upper connector (11), and the other end is connected to the second sliding rod (18); one end of the first support rod (8) is connected to the top plate (13) through the upper connecting rod (20), and the other end is connected to the first sliding rod (16); the first sliding rod (16) and the second sliding rod (18) are movably connected to the longitudinal side plate (4), and the first support rod (8) and the second support rod (9) are movably connected through the middle connecting rod (17); The first support rod (8) has an upper connecting rod hinge groove (804) at its upper end, and the first support rod (8) is hinged to the upper connecting rod (20) and the top plate (13) through the upper connecting rod hinge groove (804); the first support rod (8) has a first sliding rod hinge groove (801) at its lower end, and the first support rod (8) is hinged to the first sliding rod (16) through the first sliding rod hinge groove (801); the first support rod (8) has a first middle connecting rod fixing groove (802) in the middle, and the first support rod (8) is hinged to the middle connecting rod (17) and the second support rod (9) through the first middle connecting rod fixing groove (802); a first support rod spring (803) is provided between the upper connecting rod hinge groove (804) and the first middle connecting rod fixing groove (802) of the first support rod (8), and the two ends of the first support rod spring (803) are fixedly connected to the first support rod (8); The second support rod (9) has an upper connecting member hinge groove (903) at its upper end, and the second support rod (9) is hinged to the upper connecting member (11) through the upper connecting member hinge groove (903); the second support rod (9) has a second sliding rod hinge groove (901) at its lower end, and the second support rod (9) is hinged to the second sliding rod (18) through the second sliding rod hinge groove (901); the second support rod (9) has a second middle connecting rod fixing groove (902) in the middle, and the second support rod (9) is hinged to the middle connecting rod (17) and the first support rod (8) through the second middle connecting rod fixing groove (902).

2. The reactor adaptive double-layer vibration isolation support according to claim 1, characterized in that, The longitudinal side plate (4) is a cuboid plate structure. The inner side of the plate structure is provided with a longitudinal side plate reserved sliding groove (401). The longitudinal side plate reserved sliding groove (401) is a T-shaped cross-section groove that runs through both ends. The longitudinal side plate (4) is fixed to the base plate by welding.

3. The reactor adaptive double-layer vibration isolation support according to claim 2, characterized in that, The first sliding rod (16) is provided with a first sliding rod sliding block (1601), a first sliding rod fixing block (1602) and a worm gear (1603). The first sliding rod fixing block (1602) is a rectangular cross-section rod located in the middle of the first sliding rod (16). The first sliding rod sliding block (1601) is a cuboid slider located at both ends of the first sliding rod (16). The first sliding rod fixing block (1602) and the first sliding rod sliding block (1601) are connected by a circular cross-section rod. The worm gear (1603) extends vertically outward from the middle rectangular cross-section rod. The cuboid slider is embedded in the reserved sliding groove (401) of the longitudinal side plate and slides longitudinally within the reserved sliding groove (401) of the longitudinal side plate. The second sliding rod (18) is provided with a second sliding rod sliding block (1801) and a second sliding rod fixing block (1802). The second sliding rod fixing block (1802) is located in the middle of the second sliding rod (18), and the second sliding rod sliding block (1801) is located at both ends of the second sliding rod (18). The second sliding rod sliding block (1801) is embedded in the reserved sliding groove (401) of the longitudinal side plate and slides longitudinally within the reserved sliding groove (401) of the longitudinal side plate.

4. The reactor adaptive double-layer vibration isolation support according to claim 3, characterized in that, The transverse side plate (5) is a cuboid structure with a threaded through hole in the center; the transverse side plate (5) is fixed to the base plate by welding.

5. The reactor adaptive double-layer vibration isolation support according to claim 4, characterized in that, The worm (1603) passes through the threaded through hole of the transverse side plate (5) and is connected to the torque multiplier (6), which is driven by the motor (7).

6. The reactor adaptive double-layer vibration isolation support according to claim 1, characterized in that, The support also includes a vibration monitoring device (14) and a stiffness calculation device (15), which are installed on the top plate (13). The vibration monitoring device (14) is connected to the stiffness calculation device (15), and the stiffness calculation device (15) is connected to the motor (7).

7. The reactor adaptive double-layer vibration isolation support according to claim 1, characterized in that, The top plate (13) is provided with a top plate fixing block (1302), which is a protruding area in the middle of the lower surface of the top plate (13). A circular rotating seat (130202) is arranged on the top plate fixing block (1302). The stiffness coarse adjustment spring (10) is installed on the circular rotating seat (130202) in the form of increasing length from the middle to both ends. A circular base is provided on the bottom plate (3) opposite to the longest stiffness coarse adjustment spring (10). The longest stiffness coarse adjustment spring (10) is fixedly connected to the circular base on the bottom plate (3).

8. The reactor adaptive double-layer vibration isolation support according to claim 1, characterized in that, The number of damping vibration isolation pads (1) is the same as that of the I-shaped cross-section steel (2). The upper part of the I-shaped cross-section steel (2) is connected to the base plate (3). The upper part of the damping vibration isolation pads (1) is connected to the I-shaped cross-section steel (2). The bottom of the damping vibration isolation pads (1) is fixedly connected to the floor slab through a connector. The variable stiffness system is installed on the base plate (3).

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