Self-adaptive double-layer vibration isolation support for electric reactor

Abstract

The self-adaptive double-layer vibration isolation support comprises a damping vibration isolation pad, I-shaped section steel, a bottom plate, a variable stiffness system and a top plate which are sequentially connected from bottom to top, and reactor equipment, a vibration monitoring device and a stiffness calculation device are installed on the top plate; the variable stiffness system comprises a stiffness coarse adjustment system, a stiffness fine adjustment system and a scissor jack system; the rigidity coarse adjustment system is composed of rigidity coarse adjustment springs which are vertically arranged, the lengths of the rigidity coarse adjustment springs are arranged in an echelon mode, the rigidity fine adjustment system comprises longitudinal cylindrical spiral body springs which are horizontally arranged, and the torque multiplier and the worm mechanism are driven by a motor to change the horizontal and vertical endpoint distance of the scissor jack. And the type and the compression and stretching length of the spring participating in vibration control are adjusted. Compared with the prior art, the vibration isolation support has the advantages that the vibration isolation rigidity of the support is accurately and efficiently adjusted in a self-adaptive mode, and the limitation that in the prior art, vibration isolation supports need to be independently designed for different reactor devices is overcome.

Description

Technical Field

[0001] The invention relates to the technical field of vibration isolation devices, in particular to an adaptive double-layer vibration isolation support for a reactor. Background Art

[0002] Various types of electrical equipment in attached substations are usually installed directly on the floor slabs. These electrical equipment will generate vibration and noise problems during operation. The vibration and noise can be transmitted to other rooms in the building through structural components such as beams and columns, causing widespread vibration and noise pollution problems.

[0003] Reactor equipment is one of the important power equipment in the attached substation, but the special structure of the reactor causes the vibration and noise level generated during its operation to be very large. The vibration of the reactor equipment is mainly caused by the vibration of its internal core. When the reactor equipment is running, the core made of magnetic silicon steel sheets will produce two periodic contractions in one current cycle. When the AC frequency is the usual 50Hz, the vibration generated by the reactor has obvious spectrum-concentrated vibration characteristics, concentrated at 100Hz and its multiples, and the vibration component of 100Hz is much stronger than the vibration components of other frequencies.

[0004] When the reactor equipment is running, it will produce serious vibration and noise pollution problems, which need to be controlled. Among them, setting a vibration isolation support for the reactor is an ideal means. It has the advantages of low cost and good vibration and noise control effect. The double-layer vibration isolation support is a kind of vibration isolation support, which consists of an upper spring vibration isolation layer, a middle mass block, and a lower damping vibration isolation layer. It has a good effect in controlling high-frequency vibration and structure-borne sound propagation, and is suitable as a vibration isolation support for reactor equipment.

[0005] There are many types of reactor equipment. Different types of reactors have obvious differences in equipment quality and vibration characteristics. Therefore, it is difficult to achieve the expected effect 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 proposes a high-frequency vibration isolation device for a reactor, which has a top plate and a bottom plate arranged in parallel up and down, high-damping vibration isolation pads are arranged at the four corners of the upper surface of the top plate, and the reactor equipment is placed on the upper end surface of the high-damping vibration isolation pad. The middle of the lower surface of the top plate and the middle of the upper surface of the bottom plate are connected by a viscous shear damper, and a cylindrical coil spring is arranged between the top plate and the bottom plate at a position corresponding to the high-damping vibration isolation pad. When the structural parameters of the device are determined, the device can only achieve the optimal vibration isolation effect for a specific reactor device, and lacks the ability to flexibly adjust the stiffness according to the reactor equipment vibrating at different frequencies. In addition, the high-damping vibration isolation pad first isolates the high-frequency vibration, which increases the use loss of the vibration isolation pad and affects the service life of the device. Summary of the invention

[0007] The purpose of the present invention is to overcome the defects of the above-mentioned prior art and provide a double-layer vibration isolation support for the reactor which can adaptively change the support stiffness according to the vibration characteristics of the reactor equipment to meet the vibration isolation requirements of different types of reactors and has low loss and long service life.

[0008] The purpose of the present invention can be achieved by the following technical solutions:

[0009] According to one aspect of the present invention, there is provided an adaptive double-layer vibration isolation support for a reactor, comprising a damping vibration isolation pad, an I-section steel, a bottom plate, a variable stiffness system, and a top plate connected in sequence from bottom to top, wherein a reactor device is installed on the top plate; the variable stiffness system comprises a stiffness coarse adjustment system, a stiffness fine adjustment system, and a scissor-type jack system, wherein the stiffness coarse adjustment system comprises a plurality of stiffness coarse adjustment springs of different lengths, wherein the upper end of the stiffness coarse adjustment spring is fixedly connected to the lower surface of the top plate, and the stiffness coarse adjustment spring is perpendicular to the upper surface of the top plate, and the stiffness fine adjustment system comprises a longitudinal cylindrical coil spring, wherein the longitudinal cylindrical coil spring is located above the bottom plate and parallel to the upper surface of the bottom plate, and the scissor-type jack system connects the bottom plate and the top plate and connects the two ends of the longitudinal cylindrical coil spring, and is used to change the spacing between the bottom plate and the top plate, and to change the number of stiffness coarse adjustment springs entering into operation and the length of the longitudinal cylindrical coil spring.

[0010] Further, the scissor jack system includes an upper guide rod, an upper connecting member, 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 connecting piece 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 connecting piece, 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 lateral side plate, and the first support rod and the second support rod are movably connected through the middle connecting rod.

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

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

[0014] Furthermore, the longitudinal side plate is a rectangular plate-like structure, and a longitudinal side plate reserved sliding groove is provided on the inner side of the plate-like structure. The longitudinal side plate reserved sliding groove is a T-shaped cross-section groove penetrating at both ends; the longitudinal side plate is fixed to the bottom plate by welding.

[0015] Furthermore, the first sliding rod is provided with 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, the first sliding rod sliding blocks are rectangular parallelepiped sliders located at both ends of the first sliding rod, and the first sliding rod fixing block and the first sliding rod sliding block are connected by a circular cross-section rod; the worm gear vertically extends outward from the middle rectangular cross-section rod; the rectangular parallelepiped slider is embedded in the reserved sliding groove of the longitudinal side plate, and slides longitudinally in the reserved sliding groove of the longitudinal side plate;

[0016] The second sliding rod is provided with a second sliding rod sliding block and a second sliding rod fixed block. The second sliding rod fixed block is located in the middle of the second sliding rod. The second sliding rod sliding blocks are located at both ends of the second sliding rod. The second sliding rod sliding blocks are embedded in the sliding grooves reserved in the longitudinal side plates and slide longitudinally in the sliding grooves reserved in the longitudinal side plates.

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

[0018] Furthermore, the worm passes through the threaded through hole of the lateral side plate and is connected to the torque multiplier, and the torque multiplier is driven by the motor.

[0019] Furthermore, the support also includes a vibration monitoring device and a stiffness calculation device, the vibration monitoring device and the stiffness calculation device 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 swivel seats are arranged on the top plate fixing block. The stiffness coarse adjustment spring is installed on the circular swivel seat in a form of short to long length from the middle to both ends. A circular base is provided at a position of the bottom plate opposite to the stiffness coarse adjustment spring with the longest length. The stiffness coarse adjustment spring with the longest length is fixedly connected to the circular base on the bottom plate.

[0021] Furthermore, the number of the damping vibration isolation pads is consistent with the I-section steel, the upper part of the I-section steel is connected to the base plate, the upper part of the damping vibration isolation pad is connected to the I-section steel, the bottom of the damping vibration isolation pad is fixedly connected to the floor slab through a connecting piece, and 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. The present invention designs a variable stiffness system between the bottom plate and the top plate where the reactor equipment is installed, including a stiffness coarse adjustment system, a stiffness fine adjustment system and a scissor jack system. The stiffness coarse adjustment system is composed of stiffness coarse adjustment springs that are arranged vertically and have lengths set in stages. The stiffness fine adjustment system includes a horizontally arranged longitudinal cylindrical spiral spring. The torque multiplier and the worm mechanism are driven by a motor to change the horizontal and vertical end point distances of the scissor jack, adjust the type and compression and stretching lengths of the springs involved in vibration control, and achieve accurate and efficient adjustment of the vibration isolation stiffness of the bracket, overcoming the limitation that different reactor equipment needs to be individually designed for vibration isolation supports under the original technology.

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

[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 use loss of the damping vibration isolation pad and increasing the service life of the support.

[0026] 4. The present invention has a compact and simple structure and has low installation requirements. It can be directly applied to various types of reactor equipment without the need for separate vibration isolation support design. Moreover, each component can be uniformly produced in a standardized manner in the factory, overcoming the limitation that traditional reactor vibration isolation supports need to be customized, reducing the economic cost of setting up reactor vibration isolation supports, and greatly reducing the time cost required for reactor vibration isolation work. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 This is the overall schematic diagram of the reactor's adaptive double-layer vibration isolation support;

[0028] Figure 2 This is a top view of the reactor's adaptive double-layer vibration isolation support;

[0029] Figure 3 It is a schematic diagram of the variable stiffness system of the reactor's adaptive double-layer vibration isolation support;

[0030] Figure 4 It is a schematic diagram of the first support rod of the variable stiffness system;

[0031] Figure 5It is a schematic diagram of the second support rod of the variable stiffness system;

[0032] Figure 6 It is a schematic diagram of the first sliding rod of the variable stiffness system;

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

[0034] Figure 8 It is a schematic diagram of the longitudinal side panel;

[0035] Fig. 9 It is a schematic diagram of the lateral side panel;

[0036] Fig.10 This is a schematic diagram of the upper half of the components of the reactor's adaptive double-layer vibration isolation support;

[0037] Fig.11 Schematic diagram of the stiffness fine-tuning principle of variable stiffness system.

[0038] In the figure, 1-damping vibration isolation pad, 2-I-section steel, 3-bottom plate, 4-longitudinal side plate, 401-longitudinal side plate reserved sliding groove, 5-transverse side plate, 501, transverse side plate reserved worm opening, 6-torque multiplier, 7-motor, 8-first support rod, 801-first sliding rod hinge groove, 802-middle connecting rod fixing groove, 803-first support rod spring, 804-upper connecting member hinge groove, 9-second support rod, 901-second sliding rod hinge groove, 902-middle connecting rod fixing groove, 903-upper connecting rod hinge groove, 10-rigidity coarse adjustment spring, 11-upper connecting member, 12- Upper guide rod, 13-top plate, 1301-top plate side plate, 1302-top plate connecting block, 130101-upper guide rod connecting groove, 130201-upper connecting rod connecting groove, 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 fixed block, 1603-worm, 17-middle connecting rod, 18-second sliding rod, 1801-second sliding rod sliding block, 1802-second sliding rod fixed block, 19-longitudinal cylindrical helical spring, 20-upper connecting rod. DETAILED DESCRIPTION

[0039] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

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

[0041] As a preferred embodiment, the damping vibration isolation pad 1 can be selected from the types of vibration isolation pads such as chloroprene rubber vibration isolation pads, polyurethane vibration isolation pads and cork vibration isolation pads. The number and size of the damping vibration isolation pads 1 are determined in consideration of the size of the reactor, and the bottom thereof is fixedly connected to the floor slab through a connector. In the present embodiment, four damping vibration isolation pads 1 and I-section steel 2 are arranged side by side. Due to its internal high damping characteristics, the damping vibration isolation pad 1 has a good effect in controlling the secondary noise of the structure, and reduces the noise impact on the environment inside the building when the reactor is running. The upper part of the damping vibration isolation pad 1 is connected to the I-section steel 2, which acts as a mass block, and the upper part is connected to the base plate 3. In order to facilitate the connection between the mass block and the base plate 3 and reduce the difficulty of supporting installation, it is recommended to use steel for the base plate 3. A variable stiffness system is installed on the base plate 3. The variable stiffness system can first control the main high-frequency vibration components generated during the operation of the reactor, so that the high-frequency vibration components transmitted to the damping vibration isolation pad are significantly reduced, thereby increasing 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, the reactor equipment is placed on the top plate 13, and a vibration monitoring device 14 is arranged on the top plate near the reactor equipment. The vibration data of the monitored 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 is composed of an upper guide rod 12, an upper connecting member 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. Among them, the upper guide rod 12 passes through the top plate 13 through the upper guide rod connecting groove 16, and the two ends are fixed to the two sides of the top plate 13 by bolt connection. The upper part of the upper connecting member 11 is opened with a hole in the longitudinal direction, and the lower part is opened with a hole in the transverse direction. The upper part of the upper connecting member 11 is connected to the upper guide rod 12 and can slide freely along the upper guide rod 12, and the lower part is hinged with the second support rod 9 by bolt connection. The upper part of the upper connecting member 11 is limited on the upper guide rod 12, and the upper connecting member 11 can only slide in the longitudinal direction on the upper guide rod 12, so the second support rod 9 connected to the lower part of the upper connecting member 11 can also only move in the longitudinal plane.

[0044] The first support rod 8 has holes at the top, middle and bottom. The first support rod 8 has a slotted upper connecting member hinge slot 804 near the top, and a cylindrical coil spring 803 is arranged thereat, and both ends of the cylindrical coil spring 803 are fixed to the support rod. The first support rod 8 is hinged to the top plate 13 at the top by bolt connection. The middle part of the first support rod 8 is connected to the second support rod 9 by the middle connecting rod 17, and the two ends of the middle connecting rod 17 are respectively fixed to the first support rod 8 and the second support rod 9 by bolts. The first support rod 8 has a hole at the bottom, and is hinged to the first sliding rod 16 by bolt connection. The second support rod 9 has holes at the top, middle and bottom. The top part is hinged to the upper connecting member 11 by bolt connection, the middle part is connected to the first support rod 8 by the middle connecting rod 17, and the bottom part is hinged to the second sliding rod 16 by bolt connection.

[0045] In this embodiment, the first sliding rod 16 is a rod component with a first sliding rod fixed block 1602 having a rectangular rod in the middle, a first sliding rod sliding block 1601 having a rectangular slider at both ends, and a rod component with a cylindrical rod connected to the middle part at both ends. A cylindrical worm 1603 extends outward from the middle rectangular rod. The first sliding rod sliding block 1601 is embedded in the longitudinal side plate 4, and the slider can slide longitudinally in the groove of the longitudinal side plate 4. The cylindrical worm 1603 passes through the worm opening 501 reserved in the transverse side plate 5, and the free end is connected to the torque multiplier 6. The second sliding rod 16 is a rod component with a second sliding rod sliding block 1801 having a rectangular rod in the middle, a second sliding rod fixed block 1802 having a rectangular slider at both ends, and a rod component with a cylindrical rod connected to the middle part at both ends. The second sliding rod sliding block 1801 is embedded in the longitudinal side plate 4, and the slider can slide longitudinally in the reserved sliding groove 401 of the longitudinal side plate.

[0046] Figure 3-Figure 9The overall structural arrangement of the variable stiffness system and the structure of individual complex components are shown, wherein the longitudinal side plate 4 is a rectangular plate structure with a groove inside and a reserved sliding groove 401 for the longitudinal side plate. The longitudinal side plate 4 is connected to the bottom 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 in the longitudinal direction. The two ends of the longitudinal cylindrical helical spring 19 are fixed on the second sliding rod fixing blocks 1802 on both sides.

[0047] As a preferred embodiment, the reserved sliding groove 401 of the longitudinal side plate is a T-shaped cross-section groove, which enables the sliding rod to slide freely in the longitudinal side plate 4 while limiting the sliding rod to slide only along the longitudinal direction of the support. The longitudinal side plate 4 is fixed to the bottom plate 3 by welding.

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

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

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

[0051] As a preferred embodiment, the first support rod spring 803 can be a spring with good stability and certain deformation capacity, such as a disc spring, a wave spring and a mold spring. After the first support rod spring 803 is set, the variable stiffness system can have a certain degree of deformation capacity in the vertical direction when subjected to the vibration load of the reactor, thereby preventing the first support rod 8 and the second support rod 9 from being subjected to excessive force, thereby causing the first support rod 8 and the second support rod 9 to be damaged and the variable stiffness capacity of the variable stiffness system to fail due to unreasonable stiffness distribution.

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

[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 both ends of the upper guide rod 12 are fixed to the top plate side plates 1301 by bolt connection.

[0054] In this embodiment, a plurality of circular rotary 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 rotary seat. Such a design can quickly limit the stiffness coarse adjustment spring 10 and improve the stability of the stiffness coarse adjustment spring 10 during use.

[0055] As a preferred embodiment, the stiffness coarse adjustment spring 10 is a plurality of springs of different lengths, and the springs are made of silicon manganese steel, which ensures the stability of the springs during use. Taking 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 by the longitudinal and transverse axes respectively, and a circular rotary seat 130202 is installed on the outside of each quadrant area, and the number of circular rotary seats 130202 in each quadrant is the same. The stiffness coarse adjustment spring 10 is installed on each circular rotary seat 130202 in a pattern of gradually increasing length from the inside to the outside. Among them, the length of the outermost stiffness coarse adjustment spring 10 is greater than the maximum height of the variable stiffness layer when working. A circular rotary seat is set at the projection position of the outermost stiffness coarse adjustment spring 10 on the bottom plate 3, and the bottom of the spring is installed on this circular rotary seat to ensure that the outermost spring is always under force, providing sufficient equipment bearing capacity for the support.

[0056] As a preferred embodiment, two pairs of the longest coarse adjustment springs 10 are arranged on the outermost side of the top plate fixing block 1302, two pairs of the shortest coarse adjustment springs 10 are arranged on the innermost side of the top plate fixing block 1302, and two pairs of the intermediate length coarse adjustment springs 10 are arranged between the longest and shortest coarse adjustment springs 10. Fig.10 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 according to the target stiffness value, and issues a variable stiffness command to the variable stiffness system. After receiving the variable stiffness command, the power end of the motor rotates to generate torque, which is amplified by the torque multiplier 6 and applied to the worm 1603. The worm 1603 then rotates and moves longitudinally, driving the overall height of the variable stiffness system to change. Due to the change of the variable stiffness system, the stiffness coarse adjustment spring 10 will enter or exit the work in sequence according to the length, thereby realizing the stiffness coarse adjustment operation in the variable stiffness function of the patent of the present invention.

[0059] The overall stiffness of the support is not only related to the number of the 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. Fig.11 As shown, a first support rod 8 and a second support rod 9 are taken to form a system. When the reactor top plate 13 is subjected to the reactor vibration load F(t), the top plate 3 will have a displacement of Fig.11 At the dotted line position, the displacement is △h. At this time, the support stiffness k can be expressed as k=F / △h. At this time, the longitudinal cylindrical helical spring 19 will also produce a corresponding horizontal displacement. The cylindrical helical spring 19 is deformed to Fig.11 At the dotted line position, there is a displacement of △l. Obviously, there is a geometric relationship between the displacement △h and △l. The deformation △l of the cylindrical coil spring 19 is related to its force. According to Fig.11 As shown in the schematic diagram of the force system, 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 △l of the cylindrical helical spring 19 and the displacement △h of the top plate 3, thereby changing the stiffness of the variable stiffness system and achieving the purpose of stiffness fine-tuning.

[0060] According to the above principle, in the stiffness fine-tuning stage, under the premise of ensuring that the number of stiffness coarse-adjusting springs 10 in service remains unchanged, the motor 7 works to apply torque, which is amplified by the torque multiplier 6 and applied to the worm 1603. The worm 1603 undergoes a small displacement, driving the first support rod 8 to move in the longitudinal plane, adjusting the height of the variable stiffness system, thereby achieving the purpose of fine-tuning the support stiffness.

[0061] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can easily think of various equivalent modifications or replacements within the technical scope disclosed by the present invention, and these modifications or replacements should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention shall be based on the protection scope of the claims.

Claims

1. A reactor adaptive double-layer vibration isolation support, characterized in that: The invention comprises a damping vibration isolation pad (1), an I-section steel (2), a bottom plate (3), a variable stiffness system, and a top plate (13) which are connected in sequence from bottom to top, wherein a reactor device is installed on the top plate (13); the variable stiffness system comprises a stiffness coarse adjustment system, a stiffness fine adjustment system, and a scissor jack system; the stiffness coarse adjustment system comprises a plurality of stiffness coarse adjustment springs (10) of different lengths; the upper end of the stiffness coarse adjustment spring (10) is fixedly connected to the lower surface of the top plate (13); the stiffness coarse adjustment spring (10) and the top plate (13) are fixedly connected to each other. The stiffness fine adjustment system comprises a longitudinal cylindrical coil spring (19), which is located above the bottom plate (3) and parallel to the upper surface of the bottom plate (3). The scissor jack system connects the bottom plate (3) and the top plate (13) and connects the two ends of the longitudinal cylindrical coil spring (19) to change the spacing between the bottom plate (3) and the top plate (13) so as to change the number of stiffness coarse adjustment springs (10) entering into operation and the length of the longitudinal cylindrical coil spring (19).

2. The reactor adaptive double-layer vibration isolation support according to claim 1, characterized in that: The scissor jack system comprises an upper guide rod (12), an upper connecting member (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 connecting member (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 connecting member (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 transverse side plate (5), and the first support rod (8) and the second support rod (9) are movably connected through the middle connecting rod (17).

3. The reactor adaptive double-layer vibration isolation support according to claim 2, characterized in that: An upper connecting member hinge groove (804) is provided at the upper end of the first support rod (8), and the first support rod (8) is hinged to the upper connecting rod (20) and the top plate (13) through the upper connecting member hinge groove (804); a first sliding rod hinge groove (801) is provided at the lower end of the first support rod (8), and the first support rod (8) is hinged to the first sliding rod (6) through the first sliding rod hinge groove (801); a middle connecting rod fixing groove (802) is provided in the middle of the first support rod (8), and the first support rod (8) is hinged to the middle connecting rod (17) and the second support rod (9) through the middle connecting rod fixing groove (802); a first support rod spring (803) is provided between the upper connecting member hinge groove (804) and the middle connecting rod fixing groove (802) of the first support rod (8), and both ends of the first support rod spring (803) are fixedly connected to the first support rod (8); An upper connecting rod hinge groove (903) is provided at the upper end of the second support rod (9), and the second support rod (9) is hinged to the upper connecting member (11) through the upper connecting rod hinge groove (903); a second sliding rod hinge groove (901) is provided at the lower end of the second support rod (9), and the second support rod (9) is hinged to the second sliding rod (18) through the second sliding rod hinge groove (901); a middle connecting rod fixing groove (902) is provided in the middle of the second support rod (9), and the second support rod (9) is hinged to the middle connecting rod (17) and the first support rod (8) through the middle connecting rod fixing groove (902).

4. The reactor adaptive double-layer vibration isolation support according to claim 2, characterized in that: The longitudinal side plate (4) is a rectangular plate-like structure, and a longitudinal side plate reserved sliding groove (401) is provided on the inner side of the plate-like structure. The longitudinal side plate reserved sliding groove (401) is a T-shaped cross-sectional groove with two ends passing through. The longitudinal side plate (4) is fixed to the bottom plate by welding.

5. The reactor adaptive double-layer vibration isolation support according to claim 4, 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 blocks (1601) are rectangular parallelepiped sliders 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 via a circular cross-section rod; the worm gear (1603) extends vertically outward from the middle rectangular cross-section rod; the rectangular parallelepiped slider is embedded in the reserved sliding groove (401) of the longitudinal side plate, and slides longitudinally in 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), wherein the second sliding rod fixing block (1802) is located in the middle of the second sliding rod (18), and the second sliding rod sliding blocks (1801) are located at both ends of the second sliding rod (18). The second sliding rod sliding blocks (1801) are embedded in the reserved sliding groove (401) of the longitudinal side plate, and slide longitudinally in the reserved sliding groove (401) of the longitudinal side plate.

6. The reactor adaptive double-layer vibration isolation support according to claim 5, characterized in that: The transverse side plate (5) is a rectangular parallelepiped structure with a threaded through hole at the center; the transverse side plate (5) is fixed to the bottom plate by welding.

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

8. The reactor adaptive double-layer vibration isolation support according to claim 2, characterized in that: The support further comprises a vibration monitoring device (14) and a stiffness calculation device (15), wherein the vibration monitoring device (14) and the stiffness calculation device (15) are mounted 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).

9. 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), and the top plate fixing block (1302) 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), and the stiffness coarse adjustment spring (10) is installed on the circular rotating seat (130202) in a form of length from short to long from the middle to both ends. The bottom plate (3) is provided with a circular base at a position opposite to the stiffness coarse adjustment spring (10) with the longest length, and the stiffness coarse adjustment spring (10) with the longest length is fixedly connected to the circular base on the bottom plate (3).

10. The reactor adaptive double-layer vibration isolation support according to claim 1, characterized in that: The number of the damping vibration isolation pads (1) is consistent with the number of I-section steels (2); the upper portion of the I-section steels (2) is connected to a base plate (3); the upper portion of the damping vibration isolation pads (1) is connected to the I-section steels (2); the bottom of the damping vibration isolation pads (1) is fixedly connected to a floor slab via a connecting piece; and the variable stiffness system is installed on the base plate (3).

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