Modularized steam turbine bearing seat damping device

Abstract

The invention belongs to the technical field of vibration control, and particularly relates to a modularized steam turbine bearing seat damping device. The damping device is additionally arranged on the bearing seat at the motor driving end of the steam turbine generator unit for damping. The damping device comprises a base module, a damper module and a balance weight module, the base module is fixed to the top of a bearing seat of the steam turbine generator unit, the damper module is fixed to the upper portion of the base module, and the balance weight module is installed on the top of the damper module. The bearing seat of the steam turbine generator unit does not need to be transformed, and the bearing seat is rapid to install and maintain and has certain compatibility.

Description

Technical Field

[0001] This invention belongs to the field of vibration control technology, specifically relating to a modular turbine bearing housing vibration reduction device. Background Technology

[0002] Vibration problems in turbine generator bearing housings have long been a technical bottleneck in the power industry. Vibration not only accelerates the wear of critical components, leading to equipment damage, but can also threaten the safe operation of the unit and cause production accidents. Existing vibration reduction devices in the industry suffer from poor compatibility, inability to be adjusted according to the actual vibration conditions of the equipment, and insufficient maintainability, resulting in ineffective treatment. Summary of the Invention

[0003] This invention aims to at least partially solve the technical problems in related technologies. The vibration damping device is directly fixed to the existing structure of the bearing housing without the need for welding or drilling modifications; the number and angle of the dampers and counterweights can be flexibly configured to adapt to different vibration spectrum characteristics; the modular design allows for rapid installation and maintenance of each component.

[0004] The technical solutions adopted in this invention are as follows:

[0005] A modular turbine bearing housing vibration damping device includes a base module, a damper module, and a counterweight module; the base module is fixed on the turbine bearing housing, the damper module is disposed on the base module, and the counterweight module is fixed on the damper module.

[0006] By adopting the above technical solution, through the hierarchical assembly relationship of the base module, damper module, and counterweight module, the base is fixed to the bearing seat, the damper module is set on the base, and the counterweight module is fixed on the damper module, forming a modular split structure. Each module has independent functions and can be disassembled, which facilitates quick installation and maintenance, and can also adapt to different working conditions by adjusting the combination of each module, significantly improving the flexibility and maintainability of the device.

[0007] Furthermore, the base module includes a clamping plate, a hanging plate, and a connecting rod, which are fixed to the turbine bearing housing after being connected by bolts and nuts.

[0008] By adopting the above technical solution, the assembly relationship of the clamping plate, hanging plate and connecting rod in the base module is connected by bolts and nuts, which makes the three parts detachable and combinable. This not only reduces the overall installation difficulty of the base module, but also enables non-invasive fixing of the base module and bearing seat without welding or drilling through the detachability of bolt connection, reducing damage to the original equipment structure.

[0009] Furthermore, the clamping plate and the hanging plate are connected to each other by bolts through an oblong hole, and the clamping plate and the connecting rod are connected to each other by threads and nuts.

[0010] By adopting the above technical solution, the clamping plate and the hanging plate are connected by bolts through the oval holes, and the clamping plate and the connecting rod are connected by nuts through the threads. This assembly relationship allows the clamping plate and the hanging plate to adjust their relative positions within the range of the oval holes. The clamping plate and the connecting rod can be finely adjusted for tightness through the threaded connection, thereby adapting to bearing seat structures of different sizes or shapes and improving the compatibility of the base module.

[0011] Furthermore, the damper module includes a mounting base plate and a tuned mass damper, the tuned mass damper being mounted on the mounting base plate, and the mounting base plate being mounted on the clamping plate and hanging plate of the base module.

[0012] By adopting the above technical solution, the tuned mass damper in the damper module is fixed to the clamping plate and hanging plate of the base module through the mounting base plate, so that the tuned mass damper and the base module are indirectly connected. The mounting base plate as an intermediate carrier simplifies the positioning and installation of the damper, and facilitates the subsequent disassembly or replacement of the entire damper module, reducing the complexity of maintenance operations.

[0013] Furthermore, the circular hole of the mounting base plate is connected to the threaded hole of the tuned mass damper by bolts; the circular hole of the mounting base plate is connected to the threaded hole of the clamping plate by bolts; and the oblong hole of the mounting base plate is connected to the oblong hole of the hanging plate by bolts.

[0014] By adopting the above technical solution, the mounting base plate is connected to the threaded holes of the tuned mass damper through round holes, the threaded holes of the clamping plate through round holes, and the threaded holes of the hanging plate through oblong holes. The round holes ensure the precise positioning of the tuned mass damper and the mounting base plate, and the mounting base plate and the clamping plate, while the oblong holes allow for fine-tuning of the position of the mounting base plate and the hanging plate. This ensures the stable connection between the damper module and the base module and avoids abnormal vibration transmission caused by assembly errors.

[0015] Furthermore, the number of the tuned mass dampers is at least one, and their installation position and orientation can be adjusted along the X-axis or Y-axis direction of the mounting base plate.

[0016] By adopting the above technical solution, the number of tuned mass dampers can be set to at least one, and the installation position and direction can be adjusted along the X-axis or Y-axis of the mounting base plate. This allows the dampers to be flexibly arranged according to the actual vibration spectrum characteristics (such as increasing the number or adjusting the direction), and to be specifically matched to different vibration frequencies, thereby improving the adaptability of the vibration reduction effect.

[0017] Furthermore, the counterweight module includes a basic counterweight block and a counterweight block, wherein the basic counterweight block is disposed on the tuned mass damper and the counterweight block is disposed on the basic counterweight block.

[0018] By adopting the above technical solution, the basic counterweight block in the counterweight module is set on the tuned mass damper, and the counterweight block is superimposed on the basic counterweight block, forming a hierarchical counterweight structure. The basic counterweight block supports the counterweight block, which not only ensures the overall stability of the counterweight module, but also allows for flexible adjustment of the total counterweight mass by increasing or decreasing the number of counterweight blocks, thus meeting the mass parameter requirements under different vibration conditions.

[0019] Furthermore, the circular hole of the basic counterweight is connected to the threaded hole of the tuned mass damper by bolts; the circular hole of the counterweight is connected to the threaded hole of the basic counterweight by bolts, and the number of counterweights is at least one.

[0020] By adopting the above technical solution, the assembly relationship of connecting the base counterweight block with the threaded hole of the tuned mass damper through the round hole and connecting the counterweight block with the threaded hole of the base counterweight block through the round hole makes the connection between the counterweight block and the base counterweight block, and between the base counterweight block and the damper detachable. This facilitates the quick replacement or addition / reduction of the counterweight block according to actual needs, and the counterweight adjustment can be completed without disassembling other modules, which significantly improves the maintenance efficiency of the device.

[0021] Furthermore, the long axis of the oblong hole that mates with the clamping plate and the hanging plate of the base module is set along the X-axis and Y-axis respectively, and the length of the oblong hole is 1.5-2 times the bolt diameter.

[0022] Furthermore, the counterweight is made of steel with a density of ≥7.8g / cm³, and the weight-reducing holes on its surface are waist-shaped through holes. The total area of ​​the weight-reducing holes does not exceed 20% of the surface area of ​​the counterweight, and the minimum distance from the center of the weight-reducing hole to the edge of the counterweight is not less than 10mm.

[0023] The present invention has the following beneficial effects:

[0024] 1. This invention uses a modular design to divide the device into a base module, a damper module, and a counterweight module, enabling independent disassembly and assembly of each module and significantly improving the convenience of installation and maintenance;

[0025] 2. This invention achieves non-intrusive installation by using a base module with bolted and nut-connected clamping plates, hanging plates, and connecting rods. It eliminates the need for welding or drilling to modify the original bearing housing, thus avoiding damage to the turbine bearing housing structure and reducing the difficulty of implementation.

[0026] 3. This invention enables precise adaptation to different vibration spectrum characteristics and improves the targeting of vibration reduction effect by supporting flexible adjustment of the number, installation position and direction of the tuned mass damper along the X-axis or Y-axis of the mounting base plate, as well as the configuration of the number of counterweights that can be increased or decreased.

[0027] 4. The present invention, through the matching design of the oblong hole and threaded connection in the base module, allows the clamping plate and the hanging plate to adjust their relative positions through the oblong hole, and the clamping plate and the connecting rod to finely adjust their tightness through the thread, thus adapting to turbine bearing seats of different sizes or shapes, enhancing the compatibility and applicability of the device. Attached Figure Description

[0028] Figure 1 This is an exploded view of the modular turbine bearing housing vibration damping device of the present invention.

[0029] Figure 2 This is a schematic diagram of the base module structure of the modular turbine bearing housing vibration reduction device of the present invention.

[0030] Figure 3 This is a schematic diagram of the damper module structure of the modular turbine bearing housing vibration reduction device of the present invention.

[0031] Figure 4 This is a schematic diagram of the counterweight module structure of the present invention.

[0032] Figure 5 This is a schematic diagram of the clamping plate structure within the base module of the present invention.

[0033] Figure 6 This is a schematic diagram of the hanging plate structure inside the base module of the modular turbine bearing housing vibration damping device of the present invention.

[0034] Figure 7 This is a schematic diagram of the connecting rod structure within the base module of the modular turbine bearing housing vibration damping device of the present invention.

[0035] Figure 8 This is a schematic diagram of the mounting base plate structure within the damper module of the modular turbine bearing housing vibration reduction device of the present invention.

[0036] Figure 9 This is a schematic diagram of the front structure of the tuned mass damper in the damper module of the modular turbine bearing housing vibration reduction device of the present invention.

[0037] Figure 10 This is a schematic diagram of the reverse side structure of the tuned mass damper in the damper module of the modular turbine bearing housing vibration reduction device of the present invention.

[0038] Figure 11 This is a schematic diagram of the basic counterweight block structure within the counterweight module of the modular turbine bearing housing vibration damping device of the present invention.

[0039] Figure 12 This is a schematic diagram of the counterweight block structure within the counterweight module of the modular turbine bearing housing vibration damping device of the present invention. Detailed Implementation

[0040] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0041] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and those skilled in the art can make similar extensions without departing from the spirit of the invention. Therefore, the invention is not limited to the specific embodiments disclosed below.

[0042] Secondly, the term "an embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places throughout this specification does not necessarily refer to the same embodiment, nor is it a single embodiment or an embodiment selectively excluded from other embodiments.

[0043] The invention will now be further described with reference to the accompanying drawings. Figures 1 to 11 As can be seen, firstly, the base module 10 is composed of a clamping plate 101, a hanging plate 102 and a connecting rod 103 connected by bolts and nuts. The clamping plate 101 and the hanging plate 102 are connected by bolts through their respective oval holes 1012 and 1022, so that their relative positions can be adjusted. The clamping plate 101 and the connecting rod 103 are connected by the thread 1031 of the connecting rod 103 and the nut. After the three are combined, they are fixed on the turbine bearing housing. Secondly, the mounting base plate 201 of the damper module 20 and the tuned mass damper 202 are bolted together through the round hole 2013 of the mounting base plate 201 and the threaded hole 2022 of the tuned mass damper 202. The mounting base plate 201 is further bolted together through the round hole 2011 on it and the threaded hole 1013 of the clamping plate 101, and the oblong hole 2012 is bolted together with the oblong hole 1023 of the hanging plate 102, thereby fixing the damper module 20 as a whole onto the base module 10. The number of tuned mass dampers 202 is at least one, and their installation position and direction can be adjusted along the X-axis or Y-axis direction of the mounting base plate 201. Finally, the base counterweight block 301 of the counterweight module 30 is bolted to the threaded hole 2021 of the tuned mass damper 202 through its own circular hole 3011, and fixed to the top of the damper module 20; the counterweight block 302 is bolted to the threaded hole 3012 of the base counterweight block 301 through its own circular hole 3021, and is superimposed on the base counterweight block 301, and the number of counterweight blocks 302 is at least one. Through the above-mentioned assembly relationship of bolted connection layer by layer, a hierarchical modular structure is formed in which the base module supports the damper module and the damper module supports the counterweight module.

[0044] like Figure 1 and Figure 2As shown, the modular turbine bearing housing vibration damping device of this embodiment includes a damper module 20 and a counterweight module 30. The base module 10 is fixed to the turbine bearing housing, the damper module 20 is disposed on the base module 10, and the counterweight module 30 is fixed to the damper module 20.

[0045] like Figure 2 As shown, the base module 10 includes a clamping plate 101, a hanging plate 102, and a connecting rod 103. The clamping plate 101 and the hanging plate 102 are connected together with bolts through oblong holes 1012 and 1022. The clamping plate 101 and the connecting rod 103 are connected together with nuts through threads 1031. The three components form the base module, which is initially fixed on the turbine bearing housing cover. The oblong holes 1012 of the clamping plate 101 and the hanging plate 102 of the base module 10 are respectively set along the X-axis and Y-axis. The length of the oblong hole 1012 is 1.5 times the bolt diameter.

[0046] like Figure 3 As shown, the damper module 20 includes a mounting base plate 201 and a tuned mass damper 202. The circular hole 2013 of the mounting base plate 201 and the threaded hole 2022 of the tuned mass damper 202 are connected together by bolts to form the tuned mass damper module 20. The number, installation position and direction of the tuned mass dampers can be adjusted. Along different X or Y directions of the mounting base plate, the circular hole 2011 on the mounting base plate 201 and the threaded hole 1013 on the clamping plate 101 are connected together by bolts. The oblong hole 2012 on the mounting base plate 201 and the oblong hole 1023 on the hanging plate 102 are connected together by bolts.

[0047] like Figure 4 As shown, the counterweight module 30 includes a basic counterweight block 301 and a counterweight block 302. The circular hole 3011 on the basic counterweight block 301 is connected to the threaded hole 2021 on the tuned mass damper 202 by bolts. The circular hole 3021 on the counterweight block 302 is connected to the threaded hole 3012 on the basic counterweight block 301 by bolts. The actual number of counterweight blocks can be selected and adjusted as needed. The counterweight block 302 is made of steel material with a density of 7.8g / cm³. The weight reduction hole 3023 opened on its surface is an oblong through hole. The total area of ​​the weight reduction hole is 20% of the surface area of ​​the counterweight block, and the distance from the center of the weight reduction hole to the edge of the counterweight block is 10mm.

[0048] like Figure 5As shown, the clamping plate 101 is provided with two types of key connection structures: one is an oblong hole 1012 that mates with the hanging plate 102, through which bolts are passed between the oblong hole 1012 and the oblong hole 1022 of the hanging plate 102 to achieve an adjustable connection between the clamping plate 101 and the hanging plate 102; the other is a threaded hole 1013 that mates with the mounting base plate 201, used to fix the circular hole 2011 of the mounting base plate 201 to the clamping plate 101 by bolts, thereby supporting the damper module 20. Furthermore, the clamping plate 101 and the connecting rod 103 are connected to the nut via the thread 1031 of the connecting rod 103 to form the overall frame of the base module 10. The clamping plate 101 is bolted to the oblong hole 1022 of the hanging plate 102 via the oblong hole 1012, allowing the clamping plate 101 and the hanging plate 102 to adjust their relative positions within the oblong hole range, thereby adapting to turbine bearing seats of different sizes or shapes. At the same time, the clamping plate 101 provides a fixing point for the mounting base plate 201 of the damper module 20 via the threaded hole 1013, ensuring that the damper module 20 is stably supported on the base module 10.

[0049] like Figure 6 As shown, the mounting plate 102 has two types of key connection structures: one is an oblong hole 1022 that mates with the clamping plate 101. After the oblong hole 1022 aligns with the oblong hole 1012 of the clamping plate 101, a bolt is inserted to form an adjustable connection between the clamping plate 101 and the mounting plate 102. The other is an oblong hole 1023 that mates with the mounting base plate 201 of the damper module 20. This hole is used to connect to the oblong hole 2012 of the mounting base plate 201 via bolts, enabling fine-tuning of the position of the mounting base plate 201 and the mounting plate 102. The mounting plate 102 connects to the mounting base plate 201 through the oblong hole 1022. The bolted connection of the oblong hole 1012 of the clamping plate 101 allows the relative position of the two to be adjusted laterally or longitudinally within the oblong hole range, thereby adapting to turbine bearing housing structures of different sizes or shapes and avoiding installation difficulties caused by differences in the original equipment size; at the same time, the bolted connection of the hanging plate 102 to the oblong hole 2012 of the mounting base plate 201 through the oblong hole 1023 provides an adjustable support point for the damper module 20, ensuring stable docking between the mounting base plate 201 and the base module 10 and avoiding abnormal vibration transmission caused by assembly errors.

[0050] like Figure 7As shown, the core structure of the connecting rod 103 is the thread 1031 at its end. This thread is an external thread structure, used to cooperate with a nut to achieve an adjustable connection with the clamping plate 101. The connecting rod 103 passes through the nut at the corresponding position of its thread 1031 and the clamping plate 101, forming a threaded connection between the clamping plate 101 and the connecting rod 103. At the same time, although the connection between the connecting rod 103 and the hanging plate 102 is not directly described in the claims, considering that the clamping plate, hanging plate, and connecting rod are fixed to the bearing seat after being connected by bolts and nuts, it can be inferred that the connecting rod 103 and the hanging plate 102 may form a triangular support structure through bolts or other conventional connection methods. The three together constitute the frame of the base module 10. The main functions of 103 include: First, by engaging the thread 1031 with the nut, the tightness of the clamping plate 101 can be finely adjusted, thereby adjusting the overall installation tightness of the base module 10 and adapting to the surface shape or installation gap of different bearing seats; Second, as a supporting component of the base module 10 frame, it forms a stable mechanical structure together with the clamping plate 101 and the hanging plate 102, reliably fixing the entire vibration damping device to the turbine bearing seat, ensuring the effective transmission of the vibration suppression function of the subsequent damper module 20 and counterweight module 30; Third, the adjustable characteristics of the threaded connection provide operating space for the non-intrusive installation of the base module 10 without welding or drilling, reducing the need for modification of the original bearing seat structure.

[0051] like Figure 8As shown, the mounting base plate 201 in the damper module serves as the core support component of the damper module 20. Its structural design, connection relationship, and function are closely related: This component is a plate-shaped structure with three types of key connection holes on its surface: a round hole 2013 for engaging with the threaded hole 2022 of the tuned mass damper 202, a round hole 2011 for engaging with the threaded hole 1013 of the clamping plate 101 of the base module 10, and an oblong hole 2012 for engaging with the oblong hole 1023 of the hanging plate 102 of the base module 10. The upper and lower layers are assembled by bolt connection: the upper layer is fixed to the threaded hole 2022 of the tuned mass damper 202 through the round hole 2013, and the tuned mass damper is installed on itself; the lower layer is fixed to the clamping plate 101 through the round hole 2011 and the threaded hole 1013 of the clamping plate 101, and the oblong hole 2012 is adjustablely connected to the oblong hole 1023 of the hanging plate 102, and the whole is fixed on the clamping plate 101 and the hanging plate 102 of the base module 10. As the mounting platform for the tuned mass damper 202, it provides stable support through the circular hole 2013 and bolt connection, and utilizes the adjustable characteristics of the oblong hole to allow the tuned mass damper to adjust its position along the X-axis or Y-axis to adapt to different vibration frequency requirements; through the fixed connection of the circular hole 2011 and the adjustable connection of the oblong hole 2012, the damper module 20 is fixed as a whole to the base module 10, compensating for the assembly error of the clamping plate 101 and the hanging plate 102 to ensure a tight fit; at the same time, through the rigid connection structure, the damping force generated by the tuned mass damper 202 is effectively transmitted to the base module 10 and the turbine bearing housing, realizing the dissipation of vibration energy.

[0052] like Figure 9 and Figure 10 As shown, the front of the tuned mass damper 202 is provided with a threaded hole 2022 for fixing to the mounting base plate 201 with a bolt to ensure stable installation; its front is usually the exposed surface of the mass block, and the vibration energy is offset by the inertial force of the mass block. In some designs, the mass parameters or model identification may be marked; if it needs to be used with external sensors or adjustment devices, the front may also be provided with wire interface or adjustment knob mounting position. The reverse side of the tuned mass damper 202, which contacts the mounting base plate 201, mainly serves as a support and force transmission surface. It has a planar structure and is in close contact with the upper surface of the mounting base plate 201 to form a rigid contact, ensuring effective transmission of vibration energy. To prevent slippage, the reverse side can be provided with positioning structures such as bosses and grooves, such as limiting bosses that match the edge of the circular hole 2013 of the mounting base plate 201, which cooperate with the corresponding structure of the mounting base plate to limit horizontal displacement. At the same time, the reverse side serves as a fixed end mounting position for spring / damping elements such as metal springs and hydraulic dampers, such as threaded grooves or welding points, for connecting internal energy dissipation components, which conforms to the general design logic of tuned mass dampers.

[0053] like Figure 11As shown, the counterweight 302 typically adopts a regular geometric shape such as a cuboid, cylinder, or block structure to ensure uniform mass distribution and avoid additional vibration caused by mass eccentricity. High-density metals such as steel, cast iron, or lead alloys are often used to enhance inertial force output. Its surface or interior is designed with positioning grooves / boobs that match the internal frame or mounting cavity guide rails and limiting structures of the tuned mass damper, such as nested grooves and bosses, to limit lateral displacement during vibration and ensure linear movement only along the target direction, such as the main vibration direction of a turbine bearing housing. To adapt to different vibration frequency requirements, threaded holes or mounting ears, such as symmetrically distributed M8 threaded holes, may be provided on the surface as adjustable mass interfaces for stacking additional mass blocks or connecting with adjustment mechanisms such as lead screws or sliders to achieve dynamic adjustment of the total mass. Some designs may also have weight-reduction holes, such as circular or oblong through holes, on the edges or inside as weight-reduction optimization structures, which need to be weighed according to vibration reduction requirements. In terms of connection, the counterweight 302 is connected to the fixed frame of the tuned mass damper via springs such as helical springs, leaf springs, or viscous dampers such as hydraulic damping cylinders. One end of the spring is fixed to the frame mounting base, and the other end is connected to the corresponding mounting position of the counterweight, so as to generate relative motion under vibration excitation and absorb vibration energy through elastic force and dissipation capacity. If the tuned mass damper adopts a closed shell design, its positioning groove / protrusion needs to be tightly matched with the guide rail or limiting protrusion on the inner wall of the shell to ensure that the motion trajectory is strictly along the vibration direction, such as the X-axis or Y-axis. At the same time, the tuned mass damper is bolted to the mounting base plate 201 through the round hole 2013 of the mounting base plate 201. Its inertial force is transmitted to the mounting base plate 201 through the tuned mass damper frame, and finally acts on the base module 10 and the turbine bearing seat to achieve vibration suppression.

[0054] Working Principle: Utilizing the coupling effect of the inertial force, elastic force, and damping force of the tuned mass damper and the counterweight, efficient absorption and suppression of vibration energy from the turbine bearing housing are achieved. During turbine operation, the vibration energy generated by the mechanical motion of the bearing housing is first transmitted to the base module 10 fixed to it. This module consists of a clamping plate 101, a hanging plate 102, and a connecting rod 103 connected by oblong holes, threads, and bolts to form an adjustable frame. The clamping plate 101 and the hanging plate 102 are connected by bolts through oblong holes 1012 / 1022 to achieve fine-tuning of the lateral / longitudinal position to adapt to bearing housings of different sizes or shapes. The connecting rod 103 adjusts the installation tightness through the engagement of the end thread 1031 and the nut. Together, these three components form a stable mechanical support structure, effectively absorbing and suppressing the vibration energy. The vibration is transmitted to the upper damper module 20. The mounting base plate 201 of the damper module 20 is fixed to the base module 10 through the circular hole 2011 and the threaded hole 1013 of the clamping plate 101, and the oblong hole 2012 and the oblong hole 1023 of the hanging plate 102 are adjustablely connected to the base module 10, which ensures rigid support and allows the position to be adjusted along the X / Y axis. The tuned mass damper 202 on it is fixed to the base module 10 through the circular hole 2013 and the bolt. It contains a spring such as a helical spring or a viscous damper such as a hydraulic damping cylinder. When the vibration is transmitted to this point, the internal counterweights, including the basic counterweight 301 and the counterweight 302, generate an inertial force opposite to the direction of vibration due to inertia. At the same time, the elastic force of the spring and the dissipation capacity of the damper work together to convert the vibration energy into the elastic potential energy of the spring and the damping force. The damper absorbs heat energy initially; the counterweight module 30 is connected to the threaded hole 2021 of the tuned mass damper 202 through the circular hole 3011 of the basic counterweight block 301, and the circular hole 3021 of the counterweight block 302 is superimposed and connected to the threaded hole 3012 of the basic counterweight block 301. The counterweight blocks 301 / 302 are made of high-density metals such as steel and lead alloys and have a regular geometric shape design to ensure uniform mass distribution. The total mass is dynamically changed by adjusting at least one of the superimposed number and the adjustable interface of the surface threaded hole / mounting ear, thereby adjusting the natural frequency of the tuned mass damper to match the vibration frequency of the turbine bearing housing, forming a "frequency tuning" effect and maximizing the efficiency of inertial force and vibration energy cancellation. The "modular" nature of the device is achieved through the adjustable connection structure of each module, such as oval holes, threaded holes, and stackable counterweights. The oval holes 1012 / 1022 of the base module 10 and the thread 1031 of the connecting rod 103 allow for adaptation to different bearing housing sizes and shapes to avoid abnormal vibration transmission caused by installation errors. The mounting base plate 201 of the damper module 20 is adjustablely connected to the oval holes 1023 of the hanging plate 102 through the oval holes 2012 to support the adjustment of the position and direction of the tuned mass damper along the X / Y axis to adapt to the main vibration direction of the bearing housing. The stackable counterweights 302 of the counterweight module 30 achieve dynamic mass adjustment through the threaded holes 3012 / 3021 to accurately match the natural frequency of the tuned mass damper with the vibration frequency of the bearing housing.

[0055] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A modular turbine bearing housing vibration damping device, characterized in that: It includes a base module (10), a damper module (20) and a counterweight module (30); the base module (10) is fixed on the turbine bearing housing, the damper module (20) is disposed on the base module (10), and the counterweight module (30) is fixed on the damper module (20).

2. The modular turbine bearing housing vibration damping device according to claim 1, characterized in that: The base module (10) includes a clamping plate (101), a hanging plate (102), and a connecting rod (103). The clamping plate (101), the hanging plate (102), and the connecting rod (103) are connected by bolts and nuts and then fixed to the turbine bearing seat.

3. The modular turbine bearing housing vibration damping device according to claim 2, characterized in that: The clamping plate (101) and the hanging plate (102) are connected by bolts through the oblong hole (1012) and the oblong hole (1022), and the clamping plate (101) and the connecting rod (103) are connected by nuts through threads (1031).

4. The modular turbine bearing housing vibration damping device according to claim 1, characterized in that: The damper module (20) includes a mounting base plate (201) and a tuned mass damper (202). The tuned mass damper (202) is mounted on the mounting base plate (201), which is mounted on the clamping plate (101) and hanging plate (102) of the base module (10).

5. The modular turbine bearing housing vibration damping device according to claim 4, characterized in that: The circular hole (2013) of the mounting base plate (201) is connected to the threaded hole (2022) of the tuned mass damper (202) by bolts; the circular hole (2011) of the mounting base plate (201) is connected to the threaded hole (1013) of the clamping plate (101) by bolts; and the oblong hole (2012) of the mounting base plate (201) is connected to the oblong hole (1023) of the hanging plate (102) by bolts.

6. The modular turbine bearing housing vibration damping device according to claim 5, characterized in that: The number of the tuned mass dampers (202) is at least one, and their installation position and orientation can be adjusted along the X-axis or Y-axis direction of the mounting base plate (201).

7. The modular turbine bearing housing vibration damping device according to claim 1, characterized in that: The counterweight module (30) includes a base counterweight block (301) and a counterweight block (302). The base counterweight block (301) is mounted on the tuned mass damper (202), and the counterweight block (302) is mounted on the base counterweight block (301).

8. The modular turbine bearing housing vibration damping device according to claim 7, characterized in that: The circular hole (3011) of the basic counterweight (301) is connected to the threaded hole (2021) of the tuned mass damper (202) by bolts; the circular hole (3021) of the counterweight (302) is connected to the threaded hole (3012) of the basic counterweight (301) by bolts, and the number of counterweights (302) is at least one.

9. The modular turbine bearing housing vibration damping device according to claim 1, characterized in that: The long axis of the oblong holes (1012, 1022) of the clamping plate (101) and the hanging plate (102) of the base module (10) are respectively set along the X-axis and Y-axis. The length of the oblong holes (1012, 1022) is 1.5-2 times the bolt diameter.

10. The modular turbine bearing housing vibration damping device according to claim 3, characterized in that: The counterweight (302) is made of steel with a density of ≥7.8g / cm³. The weight-reducing holes (3023) on its surface are waist-shaped through holes. The total area of ​​the weight-reducing holes does not exceed 20% of the surface area of ​​the counterweight, and the minimum distance from the center of the weight-reducing hole to the edge of the counterweight is not less than 10mm.

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