Foundation shock absorption and isolation device of steam turbine generator
By designing the combination of bracket components and shock absorption components, the problems of insufficient vertical bearing capacity of the steam turbine generator foundation and limited maintenance space under major earthquakes are solved, efficient earthquake reduction and convenient maintenance are achieved, ensuring the safety and reliability of the system.
Patent Information
- Application Number
- CN202422453437.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-10
- Publication Date
- 2025-07-22
- Estimated Expiration
- 2034-10-10
AI Technical Summary
The seismic isolation device of the existing steam turbine generator foundation is difficult to meet the vertical bearing capacity requirements under the action of major earthquakes, and the maintenance space is limited, resulting in difficulty in maintenance.
A basic shock-reduction and isolation device for steam turbine generators is designed, including a bracket assembly, a first shock-absorbing assembly and a second shock-absorbing assembly. The first shock-absorbing assembly is shock-absorbing in the vertical direction, and a maintenance space is provided on the bracket assembly for easy maintenance.
It improves the earthquake reduction and isolation effect, ensures that the system does not collapse under major earthquakes, and provides sufficient maintenance space to quickly identify fault points and perform maintenance, improving the safety and maintainability of the system.
Smart Images
Figure CN223136215U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of large power machine foundations, and particularly relates to a vibration isolation device for a steam turbine generator foundation. Background Art
[0002] With the increasing requirements for the operation stability and safety of units in the development of the power industry, and the continuous increase in unit capacity, the vibration problem has become increasingly prominent. In related technologies, spring-damper isolators are usually used to reduce the vibration of steam turbine generator sets. When the earthquake action is relatively low, the horizontal deformation of the spring-damper isolator can basically meet the seismic requirements. However, when the earthquake action is large, it is difficult for the steel spring to meet the seismic requirements under the action of vertical bearing capacity due to its limited horizontal deformation ability. In addition, the spring-damper isolator itself may contain multiple components, and the steam turbine generator set itself is extremely heavy, and the connected spring-damper isolator also bears a considerable load. Also, since the steam turbine generator set is usually installed in a limited space, this makes the maintenance space for the spring-damper isolator very limited, resulting in extremely difficult maintenance. Content of the Utility Model
[0003] The main object of the utility model is to propose a vibration isolation device for a steam turbine generator foundation, aiming to solve the technical problem of how to improve the maintenance feasibility of the vibration isolation device for the steam turbine generator foundation while improving its vibration isolation effect.
[0004] To achieve the above object, the utility model proposes a vibration isolation device for a steam turbine generator foundation, including:
[0005] A support assembly, including a first support, a second support, and a base that are sequentially arranged at intervals in the vertical direction. The first support is provided with a first maintenance space, and the second support is provided with a second maintenance space;
[0006] A first shock absorption assembly and a second shock absorption assembly. The first shock absorption assembly is configured to be able to reduce the vibration of the steam turbine generator in the vertical direction, and the second shock absorption assembly is configured to be able to reduce the vibration of the steam turbine generator in the horizontal direction. One of the first shock absorption assembly and the second shock absorption assembly is installed between the first support and the second support, and the other is installed between the second support and the base.
[0007] In some embodiments, the first support includes a first support plate, a second support plate that are arranged at intervals in the vertical direction, and a plurality of first partition plates disposed between the first support plate and the second support plate. One end of each first partition plate is connected to the first support plate, and the other end is connected to the second support plate, so as to define the first maintenance space between the first support plate and the second support plate.
[0008] In some embodiments, the first shock absorption assembly includes a steel spring, one end of the steel spring abuts against the second bracket, and the other end abuts against the second support plate.
[0009] In some embodiments, the first shock absorption assembly further includes a first fixing member and a limiting member. One end of the first fixing member is connected to the second bracket, and the other end is slidably connected to the second support plate. The limiting member is configured to be able to slide relative to the first fixing member and be fixed to the first fixing member to limit the expansion and contraction of the steel spring.
[0010] In some embodiments, the steel spring is sleeved outside the first fixing member.
[0011] In some embodiments, the seismic isolation device for the steam turbine generator foundation further includes a first maintenance tool. The first maintenance tool is disposed in the first maintenance space and is configured to be able to drive the second support plate to move in a direction close to the second bracket.
[0012] In some embodiments, the cross-sectional area of the first support plate parallel to the horizontal direction is smaller than the cross-sectional area of the second support plate parallel to the horizontal direction;
[0013] and / or,
[0014] The first support plate is provided with a through hole penetrating into the first maintenance space.
[0015] In some embodiments, the second bracket includes a third support plate and a fourth support plate arranged at intervals in the vertical direction, and a plurality of second partition plates disposed between the third support plate and the fourth support plate. One end of each second partition plate is connected to the third support plate, and the other end is connected to the fourth support plate, so as to define the second maintenance space between the third support plate and the fourth support plate.
[0016] In some embodiments, one end of the second shock absorption assembly in the vertical direction is fixed to the fourth support plate, and the other end is fixed to the base. The second shock absorption assembly includes elastic layers and reinforcement layers that are alternately and stacked in sequence in the vertical direction.
[0017] In some embodiments, the second shock absorption assembly includes a plurality of the elastic layers and at least two of the reinforcement layers, and two of the reinforcement layers are respectively located at the top and bottom of the plurality of elastic layers.
[0018] In some embodiments, the second shock absorption assembly further includes a plurality of second fixing members. Some of the second fixing members fix one of the two reinforcement layers to the fourth support plate, and some of the second fixing members fix the other of the two reinforcement layers to the base.
[0019] In some embodiments, the turbine generator foundation seismic isolation and vibration reduction device further includes a second maintenance tool, which is disposed in the second maintenance space and configured to be able to drive the fourth support plate to move in a direction close to the base.
[0020] In some embodiments, the turbine generator foundation seismic isolation and vibration reduction device further includes a plurality of third fixing members, each of the third fixing members being configured to be able to connect the fourth support plate and the base, and the third fixing member being configured to be able to move relative to the fourth support plate in the horizontal direction.
[0021] Compared with the prior art, the beneficial effects of the present utility model are as follows:
[0022] In the technical solution of the present utility model, the turbine generator foundation seismic isolation and vibration reduction device includes a bracket assembly, a first shock absorption assembly, and a second shock absorption assembly. The bracket assembly includes a first bracket, a second bracket, and a base that are sequentially spaced apart in the vertical direction. The first shock absorption assembly is configured to be able to shock-absorb the turbine generator in the vertical direction, and the second shock absorption assembly is configured to be able to shock-absorb the turbine generator in the horizontal direction. Moreover, one of the first shock absorption assembly and the second shock absorption assembly is installed between the first bracket and the second bracket, and the other is installed between the second bracket and the base. The setting of the first shock absorption assembly greatly reduces the vertical natural frequency of the system (the vertical natural frequency of the turbine generator foundation can be reduced to 3 - 5 Hz, so that the natural frequency of the foundation is far from the operating frequency of the turbine generator set, which is 50 Hz or 25 Hz), thereby improving the vibration isolation effect, enabling the structure below the first shock absorption assembly to be disengaged from the dynamic action, and further ensuring the safety of the system. The setting of the second shock absorption assembly increases the horizontal deformation ability of the turbine generator foundation seismic isolation and vibration reduction device, so that the system can resist a large earthquake (an earthquake with a seismic intensity of more than 8 degrees). The setting of the first shock absorption assembly and the second shock absorption assembly can both reduce or even block the vibration when the turbine generator is operating, avoiding the situation where the vibration frequency of the system is close to the operating frequency of the turbine generator and causing resonance, resulting in the collapse of the system. In addition, it can also reduce or even block the influence of the vibration generated by the earthquake on the system, ensuring that the equipment and the foundation platen do not collapse.
[0023] In addition, the first bracket is provided with a first maintenance space, and the second bracket is provided with a second maintenance space, which reserves an operating space for maintenance. Maintenance personnel can limit the deformation of the first shock absorption assembly and the second shock absorption assembly through the first maintenance space and the second maintenance space to ensure the stability of the entire system during the maintenance of the turbine generator, facilitating the maintenance personnel to quickly and accurately know the fault points of the turbine generator, thus facilitating maintenance. BRIEF DESCRIPTION OF THE DRAWINGS
[0024] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on the structures shown in these drawings.
[0025] Figure 1 It is a schematic diagram of the usage scenario of the seismic isolation and vibration reduction device for the steam turbine generator foundation in an embodiment of the present invention. Among them, a steam turbine generator or other large equipment can be placed above the seismic isolation and vibration reduction device for the steam turbine generator foundation;
[0026] Figure 2 It is a schematic structural diagram of the seismic isolation and vibration reduction device for the steam turbine generator foundation in the first embodiment of the present invention. Among them, the device includes a third fixing member connecting the base and the second bracket;
[0027] Figure 3 It is a schematic structural diagram of the seismic isolation and vibration reduction device for the steam turbine generator foundation in the second embodiment of the present invention;
[0028] Figure 4 It is a schematic structural diagram of the seismic isolation and vibration reduction device for the steam turbine generator foundation in the third embodiment of the present invention. Among them, the size of the first support plate in the horizontal direction is smaller than the size of the second support plate in the horizontal direction. The first spacer extends in the horizontal direction, and the extension directions of at least two first spacers intersect.
[0029] Explanation of the reference numerals in the drawings:
[0030] Seismic isolation and vibration reduction device 100 for the steam turbine generator foundation;
[0031] Bracket assembly 110;
[0032] First bracket 111; First support plate 1111; Second support plate 1112; First partition 1113;
[0033] Second bracket 112; Third support plate 1121; Fourth support plate 1122; Second partition 1123;
[0034] First maintenance space 113; Second maintenance space 114;
[0035] Base 115; Support column 1151; Bottom steel plate 1152;
[0036] First shock absorption assembly 120; Steel spring 121; First fixing member 122; Limiting member 123;
[0037] Second shock absorption assembly 130; Elastic layer 131; Reinforcing layer 132; Second fixing member 133;
[0038] The third fixing member 140;
[0039] Horizontal direction X; vertical direction Y.
[0040] The realization, functional features and advantages of the purpose of the present utility model will be further described with reference to the embodiments and the accompanying drawings. Specific embodiments
[0041] The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.
[0042] Please refer to Figures 1 to 4 , the present utility model provides a vibration isolation device 100 for a steam turbine generator foundation, including a bracket assembly 110, a first shock absorption assembly 120 and a second shock absorption assembly 130. The bracket assembly 110 includes a first bracket 111, a second bracket 112 and a base 115 which are sequentially arranged at intervals along the vertical direction Y. The first bracket 111 is provided with a first maintenance space 113, and the second bracket 112 is provided with a second maintenance space 114. The first shock absorption assembly 120 is configured to be able to shock-absorb the steam turbine generator in the vertical direction Y, and the second shock absorption assembly 130 is configured to be able to shock-absorb the steam turbine generator in the horizontal direction X. In some embodiments, the first shock absorption assembly 120 is installed between the first bracket 111 and the second bracket 112, and the second shock absorption assembly 130 is installed between the second bracket 112 and the base 115. In other embodiments, the first shock absorption assembly 120 can also be installed between the second bracket 112 and the base 115, and the second shock absorption assembly 130 is installed between the first bracket 111 and the second bracket 112. It should be noted that the steam turbine generator is arranged above the first bracket 111, thus forming a system. Among them, the first shock absorption assembly 120 can absorb and buffer the vibration of the steam turbine generator in the vertical direction Y and reduce the influence of the vibration on the equipment. The second shock absorption assembly 130 can absorb and buffer the vibration of the steam turbine generator in the horizontal direction X and reduce the influence of the vibration on the equipment.
[0043] The arrangement of the first shock absorbing assembly 120 and the second shock absorbing assembly 130 greatly reduces the basic natural frequency of the system (the basic natural frequency is reduced to 3-5 Hz), making the basic natural frequency much lower than the operating frequency of the steam turbine generator set of 50 Hz or 25 Hz, thereby improving the vibration isolation effect, and further making the structure located at the bottom of the first shock absorbing assembly 120 and the second shock absorbing assembly 130 separated from the dynamic effect, thereby ensuring the safety of the system. In addition, the first shock absorbing assembly 120 and the second shock absorbing assembly 130 can reduce or even block the impact of vibration on the system when an earthquake occurs, ensuring that the equipment and the base plate do not collapse. The shock absorbing materials that can be used in the first shock absorbing assembly 120 include but are not limited to rubber, springs, etc., and the specific shock absorbing materials used can be selected according to the actual vibration frequency and amplitude.
[0044] The setting of the first maintenance space 113 and the second maintenance space 114 facilitates the inspection and maintenance of the system and improves the maintainability of the system. The maintenance personnel can limit the deformation of the first shock absorbing assembly 120 and the second shock absorbing assembly 130 by operating the maintenance tools in the first maintenance space 113 and the second maintenance space 114, thereby ensuring the stability of the entire system of the steam turbine generator during the maintenance process, and avoiding the first shock absorbing assembly 120 and the second shock absorbing assembly 130 being deformed due to the vibration generated during the maintenance process, thereby affecting the maintenance of the steam turbine generator. In other words, such a design is conducive to the maintenance personnel being able to quickly and accurately know the fault point and perform maintenance.
[0045] The steam turbine generator foundation seismic isolation device 100 can not only effectively reduce the vibration of the steam turbine generator in the vertical and horizontal directions X, but also facilitate overhaul and maintenance, thereby improving the reliability and maintainability of the system. In general, the first shock absorbing assembly 120 and the second shock absorbing assembly 130 can reduce or even block the vibration generated during the operation of the steam turbine generator, thereby avoiding the situation where the natural vibration frequency of the system is close to the operating frequency of the steam turbine generator, thereby causing resonance and causing system collapse. And it can protect the system from damage in extreme situations such as earthquakes.
[0046] See also Figures 2 to 4, the first support 111 includes a first support plate 1111 and a second support plate 1112 arranged at intervals along the vertical direction Y, and a plurality of first partition plates 1113 provided between the first support plate 1111 and the second support plate 1112. One end of each first partition plate 1113 is connected to the first support plate 1111, and the other end is connected to the second support plate 1112, so as to define a first maintenance space 113 between the first support plate 1111 and the second support plate 1112. The arrangement of the first support plate 1111 and the second support plate 1112 makes it convenient for the first support 111 to be assembled with other components. The first partition plates 1113 can support the first support plate 1111 and the second support plate 1112, and at the same time jointly define the first maintenance space 113 with the first support plate 1111 and the second support plate 1112. The arrangement of the first partition plates 1113 increases the load-bearing capacity of the first support 111. In some embodiments, the first support 111 can be made of high-strength materials, including but not limited to steel and aluminum alloy, etc., to further improve the load-bearing capacity and durability of the first support 111. The connection methods of the first partition plates 1113 with the first support plate 1111 and the second support plate 1112 include but are not limited to welding and bolts, etc. The first partition plates 1113 and the first support plate 1111 and the second support plate 1112 can also be prepared by an integrally formed method to ensure the stability and reliability of the structure of the first support 111. In some embodiments, the first support 111 includes a plurality of first partition plates 1113, and the setting directions of the first partition plates 1113 are all different, so that the first support plate 1111 and the second support plate 1112 are stressed evenly, and the load-bearing capacity of the first support 111 is improved.
[0047] The first shock-absorbing assembly 120 includes a steel spring 121, that is, the shock-absorbing material used in the first shock-absorbing assembly 120 is a spring. One end of the steel spring 121 abuts against the second support 112, and the other end abuts against the second support plate 1112. The steel spring 121 can absorb and buffer the vibration of the system in the vertical direction Y through its elastic characteristics, and reduce the influence of the vibration on the steam turbine generator and other equipment and structures. The steel spring 121 is connected to the second support 112 and the second support plate 1112 in a manner of abutting. Due to the large mass of the steam turbine generator, under the action of the gravity of the steam turbine generator, the steel spring 121 can stably abut against the second support plate 1112 and the second support 112. In this way, the installation process of the steel spring 121 can be simplified, and at the same time, it is also beneficial to simplify the maintenance and replacement operation of the steel spring 121.
[0048] Please refer to Figure 2, the first shock-absorbing component 120 further includes a first fixing member 122 and a limiting member 123. One end of the first fixing member 122 is connected to the second bracket 112, and the other end is slidably connected to the second support plate 1112. The limiting member 123 is configured to be able to slide relative to the first fixing member 122 and be fixed to the first fixing member 122 to limit the expansion and contraction of the steel spring 121. The combined use of the first fixing member 122 and the limiting member 123 enables the steel spring 121 to expand and contract within a certain range, preventing damage caused by excessive expansion and contraction of the steel spring 121, and improving the service life and reliability of the first shock-absorbing component 120. The limiting member 123 can fix the position of the steel spring 121 when needed to ensure the stability and reliability of the shock-absorbing effect. In addition, the fixing function of the limiting member 123 enables the position of the steel spring 121 to be locked during system maintenance or in special cases, allowing the steel spring to withdraw from work to ensure the stability and safety of the system, facilitating the maintenance of other structures.
[0049] In some embodiments, the limiting member 123 can be designed to be adjustable to meet the requirements under different working conditions. Exemplarily, the limiting member 123 can be connected to the first fixing member 122 by means of screw adjustment or snap fixation to facilitate adjusting the position of the limiting member 123 relative to the first fixing member 122. In one embodiment, the structural members that the first fixing member 122 can adopt include but are not limited to screws, and the structure that the limiting member 123 adopts includes but is not limited to nuts, etc. Among them, the limiting member 123 can be equipped with anti-loosening devices such as spring washers or lock nuts to prevent loosening caused by vibration during long-term use. In addition, the setting of the first maintenance space 113 reserves an operating space for the system, which is beneficial for the staff to assemble or disassemble the first fixing member 122 and the limiting member 123.
[0050] Please refer to Figures 2 to 4 , the steel spring 121 is sleeved outside the first fixing member 122. Through the guiding action of the first fixing member 122, the steel spring 121 remains stable during the expansion and contraction process, avoiding the decline of the shock-absorbing effect caused by deviation and distortion, and further improving the reliability and safety of the system. The steel spring 121 and the first fixing member 122 can be subjected to anti-corrosion treatment, including but not limited to galvanizing and coating anti-corrosion coatings, etc., to extend their service life.
[0051] The seismic isolation and vibration reduction device 100 for the steam turbine generator foundation further includes a first maintenance tool, which is arranged in the first maintenance space 113 and configured to be able to drive the second support plate 1112 to move towards the second support 112, so as to facilitate adjusting the pre-tightening force or position of the steel spring 121. When the first maintenance tool drives the second support plate 1112 to move towards the second support 112, the steel spring 121 is gradually compressed, so that the steel spring 121 exits the working state. At this time, the limiting member 123 is locked to the first fixing member 122 to limit the length of the steel spring 121, so as to facilitate the inspection and maintenance of the steam turbine generator or other structures. By arranging the first maintenance tool in the first maintenance space 113, maintenance personnel can adjust the position or pre-tightening force of the steel spring 121 without removing the first shock absorption assembly 120, ensuring the normal working state of the first shock absorption assembly 120. This not only improves the maintenance efficiency, but also reduces the potential risks brought by frequent disassembly and assembly, ensuring the stability and safety of the system. The first maintenance tool can be manually, electrically or hydraulically driven to meet different maintenance requirements. For example, using electric drive for the first maintenance tool can improve the maintenance efficiency, and using hydraulic drive can provide greater driving force. In some embodiments, the first maintenance tool includes, but is not limited to, a jack, a lifting platform, etc. The first maintenance tool can be equipped with a safety locking device to prevent accidental startup or movement during maintenance and ensure the safety of maintenance personnel.
[0052] In some embodiments, referring to Figure 4 , the cross-sectional area of the first support plate 1111 parallel to the horizontal direction X is smaller than the cross-sectional area of the second support plate 1112 parallel to the horizontal direction. Thus, the first maintenance tool can smoothly pass through the first support plate 1111, abut against other structural members or reach the first maintenance space 113, so as to facilitate the maintenance personnel to operate the first maintenance tool to drive the first support 111 to move relative to the second support 112, thus facilitating the maintenance operation. Specifically, such an arrangement can improve the convenience and efficiency of maintenance. In other embodiments, the first support plate 1111 is provided with a through hole penetrating to the first maintenance space 113, so that the first maintenance tool can pass through the through hole and abut against other structural members, thus facilitating the maintenance personnel to conveniently operate the first maintenance tool. To ensure the bearing capacity of the first support plate 1111, the size of the through hole can be adjusted according to the actual size of the first maintenance tool to ensure that the maintenance tool can pass through smoothly, while avoiding the through hole size being too large and affecting the bearing capacity of the first support plate 1111. In still other embodiments, the first support plate 1111 can also be provided with a reinforcement design, including but not limited to structures such as ribs and ribs, so as to improve the strength and stability of the first support plate 1111.
[0053] In some embodiments, the first maintenance tool can act on the first support 111 and the second support 112 (or act on the first support 111 and the base 115), so as to support the first support 111 and the structures above it, making the first shock absorption assembly 120 not under force, facilitating operations such as maintenance or replacement of the first shock absorption assembly 120 by the staff.
[0054] Please refer to Figures 2 to 4 , the second support 112 includes a third support plate 1121, a fourth support plate 1122 arranged at intervals in the vertical direction Y, and a plurality of second partition plates 1123 arranged between the third support plate 1121 and the fourth support plate 1122. One end of each second partition plate 1123 is connected to the third support plate 1121, and the other end is connected to the fourth support plate 1122, so as to define a second maintenance space 114 between the third support plate 1121 and the fourth support plate 1122. The arrangement of the second partition plates 1123 is beneficial to ensuring the bearing capacity of the second support 112 while jointly defining the second maintenance space 114 with the third support plate 1121 and the fourth support plate 1122. Thus, the maintenance personnel can limit the deformation of the second shock absorption assembly 130 through the second maintenance space 114, ensuring the stability of the entire system during the maintenance of the steam turbine generator, and facilitating quickly and accurately knowing the fault point and carrying out repairs. The second support 112 can be made of high-strength materials such as steel or aluminum alloy to improve its load-bearing capacity and durability. The second partition plates 1123 can be connected by welding or bolts to ensure the stability and reliability of its structure. In some embodiments, the second support 112 can be designed to have additional reinforcement structures such as ribs or support rods to improve its structural stability and load-bearing capacity.
[0055] Please refer to Figure 4 , in some embodiments, the size of the fourth support plate 1122 in the horizontal direction X is smaller than the size of the third support plate 1121 in the horizontal direction X. Thus, the maintenance tool can pass through the fourth support plate 1122 and abut against the base 115, so as to support the second support 112 and the structures above it, making the second shock absorption assembly 130 not under force, facilitating the maintenance personnel to carry out maintenance or replacement of the second shock absorption assembly 130, etc.
[0056] Please refer to Figures 2 to 4, one end of the second shock absorption assembly 130 along the vertical direction Y is fixed to the fourth support plate 1122, and the other end is fixed to the base 115. The second shock absorption assembly 130 includes an elastic layer 131 and a reinforcement layer 132 that are alternately and stacked in sequence along the vertical direction Y. Among them, the elastic layer 131 can absorb and buffer the vibration of the steam turbine generator in the horizontal direction X, reducing the impact of vibration on the equipment. The reinforcement layer 132 can increase the structural strength of the second shock absorption assembly 130 and improve its bearing capacity. At the same time, the alternating and stacked arrangement of the reinforcement layer 132 and the elastic layer 131 can effectively prevent the elastic layer 131 from being overly deformed and causing the system to collapse. The elastic layer 131 can be made of elastic materials including but not limited to rubber, polyurethane, etc. The specific material used for the elastic layer 131 can be selected according to the actual situation to be an elastic material that can adapt to different vibration frequencies and amplitudes. The reinforcement layer 132 can be made of high-strength materials including but not limited to steel plates, titanium alloys, carbon fibers, etc. The specific material used for the reinforcement layer 132 can be selected according to the actual situation to be a material that can improve the stability and bearing capacity of the second shock absorption assembly 130. It should be noted that the number of the elastic layer 131 and the reinforcement layer 132 can be adjusted according to actual needs to optimize the shock absorption effect. Exemplarily, increasing the number of the elastic layer 131 can improve the shock absorption effect, and increasing the number of the reinforcement layer 132 can improve the rigidity of the structure.
[0057] In some embodiments, please refer to Figures 2 to 4, the second shock-absorbing component 130 includes a plurality of elastic layers 131 and at least two reinforcing layers 132, wherein the two reinforcing layers 132 are respectively located at the top and bottom of the plurality of elastic layers 131. The laminated structure of the elastic layer 131 and the reinforcing layer 132 can provide good shock-absorbing effect. The elastic layer 131 can absorb and buffer vibrations, while the reinforcing layer 132 can improve the rigidity and stability of the structure, ensuring that the second shock-absorbing component 130 will not be damaged when subjected to a large impact. By providing the reinforcing layers 132 at the top and bottom of the elastic layer 131, it is beneficial to improve the connection reliability between the second shock-absorbing component 130 and the first bracket 111 and the second bracket 112. Among them, the second shock-absorbing component 130 can be connected to the first bracket 111 through threaded fasteners and connected to the second bracket 112 through threaded fasteners. Such a design also ensures the overall structural strength and stability of the second shock-absorbing component 130 and improves its shock-absorbing effect under extreme conditions. It not only improves the reliability of the system but also ensures the stability and safety of the equipment during long-term operation. In some embodiments, the second shock-absorbing component 130 can also be connected to the first bracket 111 and the second bracket 112 by welding to ensure its stability and reliability under different working conditions. In some embodiments, the thicknesses of the elastic layers 131 can be the same or can be set to different thicknesses according to the vibration forces received at different positions, and the thicknesses of the reinforcing layers 132 can be the same or can be set to different thicknesses according to the stress conditions received at different positions. In other words, the thicknesses of the elastic layer 131 and the reinforcing layer 132 can be adjusted according to actual needs to optimize the shock-absorbing effect and structural stability. Exemplarily, the thicknesses of the elastic layers 131 can be the same, and the thicknesses of the reinforcing layers 132 near the first bracket 111 and near the second bracket 112 can be greater than the thicknesses of the reinforcing layers 132 located between the elastic layers 131. It should be noted that increasing the thickness of the elastic layer 131 can improve the shock-absorbing effect, and increasing the thickness of the reinforcing layer 132 can improve the rigidity of the structure. An adhesive or other connection method can be used between the elastic layer 131 and the reinforcing layer 132 to ensure the tight bonding between layers and prevent separation during use. The second shock-absorbing component 130 can be designed to have good environmental adaptability, such as high temperature resistance, corrosion resistance, etc., to adapt to different use environments and working conditions.
[0058] The second shock-absorbing assembly 130 further includes a plurality of second fixing members 133. Some of the second fixing members 133 fix one of the two reinforcing layers 132 to the fourth support plate 1122, and some of the second fixing members 133 fix the other of the two reinforcing layers 132 to the base 115. In some embodiments, the second fixing member 133 may be a threaded fastener. It should be noted that the depth of insertion of the threaded fastener into the second shock-absorbing assembly 130 does not exceed the thickness of the reinforcing layer 132 to ensure that the elastic layer 131 is not affected by the threaded fastener. By providing the second fixing member 133, it is ensured that the second shock-absorbing assembly 130 does not displace or fall off during use, improving the stability and safety of the system. At the same time, the design of the second fixing member 133 makes the installation and maintenance of the second shock-absorbing assembly 130 more convenient, improving the maintainability of the system. The second fixing member 133 may be made of a high-strength material including but not limited to stainless steel and aluminum alloy to improve the connection ability and durability. The second fixing member 133 may be equipped with an anti-loosening device such as a spring washer or a lock nut to prevent loosening caused by vibration during long-term use.
[0059] The turbine generator foundation seismic isolation device 100 further includes a second maintenance tool. The second maintenance tool is disposed in the second maintenance space 114 and is configured to be able to drive the fourth support plate 1122 to move in a direction close to the base 115, thereby adjusting the pre-tightening force or position of the second shock-absorbing assembly 130. By providing the second maintenance tool, maintenance personnel can perform maintenance on the turbine generator without removing the second shock-absorbing assembly 130. This not only improves the maintenance efficiency but also reduces the potential risks brought by frequent disassembly and assembly, ensuring the stability and safety of the system. The second maintenance tool may be manually, electrically or hydraulically driven to meet different maintenance requirements. In some embodiments, the second maintenance tool may be equipped with a safety locking device to prevent accidental startup or movement during maintenance, ensuring the safety of maintenance personnel. The second maintenance tool may be designed to be semi-automatic or fully automatic and realize remote operation through a control system to further improve the maintenance efficiency and safety. The second maintenance tool may be the same as or different from the first maintenance tool. In some embodiments, the second maintenance tool may also adopt a jack structure.
[0060] In some embodiments, please refer to Figure 2, the seismic isolation and vibration reduction device 100 for a steam turbine generator foundation further includes a plurality of third fixing members 140. Each third fixing member 140 is configured to be able to connect the fourth support plate 1122 and the base 115, and the third fixing member 140 is configured to be able to move relative to the fourth support plate 1122 in the horizontal direction X. Specifically, the third fixing member 140 can move relative to the fourth support plate 1122 in the horizontal direction X, ensuring the deformation of the second shock absorption assembly 130 in the horizontal direction X, enabling the second shock absorption assembly 130 to effectively absorb and buffer vibrations in the horizontal direction X, improving the shock absorption effect of the system. At the same time, the setting of the third fixing member 140 makes the second support 112 and the base 115 form an integral body, improving the integrity of the seismic isolation and vibration reduction device 100 for a steam turbine generator foundation, and thus ensuring the stability and safety of the system.
[0061] Among them, the third fixing member 140 can be a threaded structural member made of high-strength materials (including but not limited to stainless steel, aluminum alloy, etc.). The base 115 includes a support column 1151 made of concrete. A part of the third fixing member 140 is embedded in the support column 1151. One end of the third fixing member 140 away from the support column 1151 can be provided with threads and is slidably connected to the fourth support plate 1122 through structures such as nuts. Specifically, the fourth support plate 1122 is provided with a sliding groove, and the third fixing member 140 passes through the sliding groove and can slide in the sliding groove. Thus, when the second shock absorption assembly 130 deforms under the action of vibration force, it can effectively avoid the third fixing member 140 from hindering the shock absorption effect of the second shock absorption assembly 130.
[0062] In some embodiments, the base 115 further includes a bottom steel plate 1152. The bottom steel plate 1152 is located between the second shock absorption assembly 130 and the support column 1151 and is used to connect the second shock absorption assembly 130 and the support column 1151. Among them, the thickness of the bottom steel plate 1152 is much greater than the thickness of the strengthening layer 132. The setting of the bottom steel plate 1152 is beneficial to improving the connection reliability between the support column 1151 and the second shock absorption assembly 130, and at the same time improving the bearing capacity of the seismic isolation and vibration reduction device 100 for a steam turbine generator foundation.
[0063] It should be noted that if there are directional indications (such as up, down, left, right, front, back...) involved in the embodiments of the present invention, the directional indications are only used to explain the relative position relationship and movement conditions between components in a certain specific posture. If the specific posture changes, the directional indications will also change accordingly.
[0064] In addition, if the descriptions such as "first" and "second" are involved in the embodiments of the present utility model, these descriptions of "first", "second", etc. are for descriptive purposes only, and should not be construed as indicating or implying their relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In addition, if "and / or", "or / and", or "and / or" appear throughout the text, their meanings include three parallel scenarios. Taking "A and / or B" as an example, it includes Scenario A, or Scenario B, or the scenario where both A and B are satisfied simultaneously. In addition, the technical solutions between various embodiments can be combined with each other, but it must be based on the ability of those of ordinary skill in the art to implement. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.
[0065] The above are only the preferred embodiments of the present utility model, and do not limit the patent scope of the present utility model accordingly. Any equivalent structural transformation made by using the content of the specification and drawings of the present utility model under the inventive concept of the present utility model, or any direct / indirect application in other related technical fields is included in the patent protection scope of the present utility model.
Claims
1. A base isolation device for a steam turbine generator, characterized in that, Comprising: A support assembly, including a first support, a second support, and a base that are sequentially arranged at intervals in the vertical direction. The first support is provided with a first maintenance space, and the second support is provided with a second maintenance space; A first shock-absorbing assembly and a second shock-absorbing assembly. The first shock-absorbing assembly is configured to be able to shock-absorb the steam turbine generator in the vertical direction, and the second shock-absorbing assembly is configured to be able to shock-absorb the steam turbine generator in the horizontal direction. One of the first shock-absorbing assembly and the second shock-absorbing assembly is installed between the first support and the second support, and the other is installed between the second support and the base.
2. The seismic isolation device for the steam turbine generator foundation according to claim 1, wherein The first support includes a first support plate, a second support plate that are arranged at intervals in the vertical direction, and a plurality of first partition plates provided between the first support plate and the second support plate. One end of each first partition plate is connected to the first support plate, and the other end is connected to the second support plate, so as to define the first maintenance space between the first support plate and the second support plate.
3. The seismic isolation device for the steam turbine generator foundation according to claim 2, wherein The first shock-absorbing assembly includes a steel spring. One end of the steel spring abuts against the second support, and the other end abuts against the second support plate.
4. The seismic isolation device for the steam turbine generator foundation according to claim 3, wherein The first shock-absorbing assembly further includes a first fixing member and a limiting member. One end of the first fixing member is connected to the second support, and the other end is slidably connected to the second support plate. The limiting member is configured to be able to slide relative to the first fixing member and be fixed to the first fixing member to limit the expansion and contraction of the steel spring.
5. The seismic isolation device for the steam turbine generator foundation according to claim 4, wherein The steel spring is sleeved outside the first fixing member.
6. The seismic isolation device for the steam turbine generator foundation according to claim 2, wherein The seismic isolation device for the steam turbine generator foundation further includes a first maintenance tool. The first maintenance tool is arranged in the first maintenance space and is configured to be able to drive the second support plate to move in a direction close to the second support.
7. The seismic isolation device for the steam turbine generator foundation according to claim 6, wherein The cross-sectional area of the first support plate parallel to the horizontal direction is smaller than the cross-sectional area of the second support plate parallel to the horizontal direction; And / or, The first support plate is provided with a through hole penetrating into the first maintenance space.
8. The seismic isolation device for the steam turbine generator foundation according to claim 1, wherein The second support includes a third support plate, a fourth support plate that are arranged at intervals in the vertical direction, and a plurality of second partition plates provided between the third support plate and the fourth support plate. One end of each second partition plate is connected to the third support plate, and the other end is connected to the fourth support plate, so as to define the second maintenance space between the third support plate and the fourth support plate.
9. The seismic isolation device for the steam turbine generator foundation according to claim 8, wherein One end of the second shock absorption assembly in the vertical direction is fixed to the fourth support plate, and the other end is fixed to the base. The second shock absorption assembly includes elastic layers and reinforcement layers that are alternately and stacked in sequence in the vertical direction.
10. The turbine generator foundation seismic isolation and vibration reduction device according to claim 9, wherein the second shock absorption assembly includes a plurality of the elastic layers and at least two of the reinforcement layers, and two of the reinforcement layers are respectively located at the top and the bottom of the plurality of elastic layers.
11. The turbine generator foundation seismic isolation and vibration reduction device according to claim 10, wherein the second shock absorption assembly further includes a plurality of second fixing members. Some of the second fixing members fix one of the two reinforcement layers to the fourth support plate, and some of the second fixing members fix the other of the two reinforcement layers to the base.
12. The turbine generator foundation seismic isolation and vibration reduction device according to claim 9, wherein the turbine generator foundation seismic isolation and vibration reduction device further includes a second maintenance tool. The second maintenance tool is arranged in the second maintenance space and is configured to be able to drive the fourth support plate to move in a direction close to the base.
13. The turbine generator foundation seismic isolation and vibration reduction device according to claim 9, wherein the turbine generator foundation seismic isolation and vibration reduction device further includes a plurality of third fixing members. Each of the third fixing members is configured to be able to connect the fourth support plate and the base, and the third fixing member is configured to be able to move relative to the fourth support plate in the horizontal direction.