A multi-frequency power absorber

Abstract

The utility model relates to power absorber technical field discloses a multi -frequency power absorber, aims at solving the problem of traditional single -frequency absorber frequency band narrow, cannot cope with the problem of multi -band composite vibration. Its main structure includes vibration equipment and multi -frequency absorber ontology, ontology contains base, damping vibration reduction mechanism, counterweight spare, base detachable connection vibration equipment, four groups annular array or integral setting, damping mechanism contains split / integral type shock attenuation component no.

Description

Technical Field

[0001] This utility model belongs to the field of vibration absorber technology and relates to a multi-frequency dynamic vibration absorber. Background Technology

[0002] In the power and chemical industries, various pumps and other rotating equipment play a crucial role in industrial systems, and their stable operation is essential for the entire production process. However, in actual operation, these devices often face complex vibration problems caused by impeller vibration, motor start-up and shutdown, and water flow impact. These problems not only affect the efficiency of the equipment but may also damage the equipment itself and its surrounding structures. Traditional vibration absorbers typically use a single-damping structure, which cannot effectively dissipate the energy of multi-frequency vibrations and can only solve vibration problems at a single frequency. This results in poor overall vibration reduction when dealing with equipment that exhibits multi-frequency vibrations. Therefore, there is an urgent need for a multi-frequency dynamic vibration absorber that can be equipped with vibration absorption modules for each vibration frequency band, solving vibration problems at multiple frequency bands, to meet the wide-frequency vibration reduction needs of industrial equipment.

[0003] This invention discloses a driveshaft intermediate support structure with a multi-frequency dynamic vibration absorber, as disclosed in announcement number CN217207473U. The intermediate support of the driveshaft and the dynamic vibration absorber are fixed to the vehicle floor by fastening bolts. The dynamic vibration absorber consists of an inner ring, a main spring, and a mass block. The main spring vulcanizes the inner ring and the mass block into one piece. The dynamic stiffness of the main spring and the mass block are adjustable, allowing for the creation of any desired natural frequency to attenuate abnormal vibrations in the transmission system. Adding a second main spring and a second mass block enables the dynamic vibration absorber to possess diverse natural frequencies, attenuating different types and frequencies of vibrations in the transmission system. This invention designs and installs vibration absorbers with different natural frequencies based on the specific vibration frequency range of the automotive driveshaft and transmission system. Through multi-stage vibration absorption, it improves overall vehicle comfort and NVH performance. The structure is simple and reliable, and installation, maintenance, and replacement are relatively easy. Common steel plate materials can be appropriately used to reduce costs. The vibration absorber itself has a simple structure, primarily composed of rubber components. However, the mass blocks and counterweight units in the aforementioned devices are mostly of fixed specifications and cannot be flexibly adjusted according to the specific vibration frequency band of the target equipment. Therefore, it is imperative for those skilled in the art to solve the aforementioned technical problems. Utility Model Content

[0004] To address the aforementioned problems and deficiencies, this invention modifies the vibration damping structure based on the target equipment, thereby improving the flexibility of the vibration damping unit.

[0005] To solve the above-mentioned technical problems, this utility model relates to a multi-frequency dynamic vibration absorber, which is installed on a vibrating device to reduce vibration. The multi-frequency dynamic vibration absorber is disposed on the vibrating device and includes a base, a damping vibration reduction mechanism, and a counterweight. The base is disposed on the vibrating device, the damping vibration reduction mechanism is disposed on the base, and the counterweight is disposed on the damping vibration reduction mechanism.

[0006] By adopting the above technical solution, a hierarchical structure is constructed by sequentially assembling the base, damping and vibration reduction mechanism, and counterweight on the vibrating equipment. This creates an effective transmission path for vibration energy from the equipment to the vibration absorber. The base serves as a connecting carrier to ensure stable contact between the vibration absorber and the equipment. The damping and vibration reduction mechanism receives the vibration and initially dissipates the energy. The counterweight, through its own mass and coupling with the damping mechanism, achieves the transfer and dissipation of vibration energy. The overall structure breaks through the limitations of traditional single-frequency vibration absorbers, providing a basic framework for multi-frequency vibration reduction and improving the feasibility of broadband vibration suppression of the equipment.

[0007] Furthermore, the damping vibration reduction mechanism includes a damping vibration reduction component one and a damping vibration reduction component two, both of which are disposed on the base. The counterweight includes a counterweight one and a counterweight two, with the counterweight one disposed on the damping vibration reduction component one and the counterweight two disposed on the damping vibration reduction component two.

[0008] By adopting the above technical solution, and by setting the first damping vibration reduction component and the second vibration reduction component in parallel on the base, and correspondingly assembling the first counterweight and the second counterweight, a split structure is used to achieve targeted vibration reduction in different frequency bands: the combination of the first damping vibration reduction component and the first counterweight absorbs low-frequency vibration, and the combination of the second component and the second counterweight suppresses high-frequency resonance, thus solving the problem of compound vibration during equipment operation, effectively covering the vibration range of multiple frequency bands, and improving the overall comprehensiveness of the vibration reduction effect.

[0009] Furthermore, the base and the damping vibration reduction mechanism are in four groups, and the four groups of the base and the damping vibration reduction mechanism are arranged in a circular array, and each group of the damping vibration reduction mechanism is an arc-shaped integral damping elastic unit or a single damping elastic unit.

[0010] By adopting the above technical solution, the assembly method of the four sets of bases and the ring array of damping and vibration reduction mechanism makes the vibration absorbers evenly distributed on the equipment end cover. The arc-shaped integral / single damping elastic unit is adapted to the circular structure of the equipment end cover, which increases the contact area with the equipment, makes the vibration force more uniform, avoids local stress concentration, and at the same time, the multiple modules work together to further broaden the vibration absorption frequency band and improve the vibration reduction stability and reliability.

[0011] Furthermore, the vibration device, the base, and the counterweight are each provided with corresponding bolt holes, and the vibration device, the base, and the counterweight are connected by fasteners that match the bolt holes.

[0012] By adopting the above technical solution, the assembly method of connecting the vibration equipment, base, and counterweight with corresponding bolt holes and fasteners achieves detachable fixing. The installation does not require damage to the equipment body and the steps are simple and convenient. The fasteners ensure that the connection of each component is tight, reduce vibration energy loss caused by assembly gaps, improve the reliability of structural connection, and facilitate later maintenance and component replacement.

[0013] Furthermore, the first counterweight and the second counterweight are in multiple sets, with multiple sets of the first counterweight stacked on the first damping vibration damping component and multiple sets of the second counterweight stacked on the second damping vibration damping component.

[0014] By adopting the above technical solution, the structure in which multiple sets of counterweight one and counterweight two are stacked on the corresponding damping and vibration reduction components can flexibly adjust the quantity and quality of counterweights according to the equipment model, and specifically adapt to the vibration frequency band requirements of different equipment; the stacking method saves installation space, enhances the contact tightness between the counterweight and the vibration reduction component, improves energy dissipation efficiency, and at the same time reduces the problem of insufficient vibration reduction effect caused by the single specification of counterweight.

[0015] Furthermore, the first counterweight is dynamically coupled to the first damping vibration reduction component, and the second counterweight is dynamically coupled to the second damping vibration reduction component.

[0016] By adopting the above technical solution, the dynamic coupling connection between the counterweight and the damping vibration reduction component enables the vibration response of the counterweight to match the elastic deformation of the vibration reduction component in real time, efficiently transferring and dissipating the vibration energy of the corresponding frequency band, avoiding energy reflection or residue, and improving vibration reduction efficiency; the coupling connection also enhances the synergy between components, ensuring that multiple modules can work stably under different vibration conditions.

[0017] Furthermore, the base is detachably mounted on the end cover of the vibration device.

[0018] By adopting the above technical solution, the base can be detachably installed on the end cover of the vibration equipment, which is compatible with the conventional structure of the end cover of the equipment. No additional equipment modification is required, and the installation is convenient. The detachable design allows the vibration absorber to be quickly disassembled and assembled according to the equipment maintenance needs, reducing the difficulty of operation and improving the versatility of the vibration absorber among different equipment.

[0019] Furthermore, the four sets of bases are integrally configured with the damping and vibration reduction mechanism.

[0020] By adopting the above technical solution, the structure of the four sets of bases and the damping vibration reduction mechanism as a whole reduces the errors caused by scattered assembly and enhances the overall rigidity of the vibration absorber; the overall structure simplifies the installation steps, eliminates the need to adjust the position of each set, improves installation efficiency, and avoids the gap problem between scattered components, ensuring the consistency of vibration energy transmission.

[0021] Furthermore, the damping vibration reduction component one and the damping vibration reduction component two are separate structures.

[0022] By adopting the above technical solution, the damping vibration reduction component one and the damping vibration reduction component two adopt a split-structure assembly method, which makes it easy to replace or adjust the components individually for vibration requirements of different frequency bands, reducing maintenance costs; the split structure can flexibly adapt to the installation space of the base, avoid the limitation of the overall structure on the shape of the equipment end cover, and improve the adaptability of the vibration absorber.

[0023] Furthermore, the damping and vibration reduction components one and two of the split structure are rectangular in shape.

[0024] By adopting the above technical solution, the split damping vibration reduction component adopts a rectangular shape design. The rectangular structure is easy to standardize and mass-produce, reducing manufacturing costs. The rectangular shape can better fit the planar structure of the base and counterweight, increasing the contact area and improving the stability of vibration energy transmission. At the same time, it is easy to accurately position and install on the base.

[0025] The beneficial effects of this utility model are as follows:

[0026] 1. This utility model achieves targeted absorption of multi-frequency vibration energy through the combination design of modular stacked damping and vibration reduction mechanisms and corresponding counterweights, breaking through the limitations of traditional single-frequency vibration absorbers, effectively covering the composite vibration frequency bands in equipment operation, and achieving a wide-band vibration suppression effect.

[0027] 2. This utility model uses a detachable bolt connection structure between the base and the vibration equipment, combined with a modular component assembly method, to complete the installation without modifying the equipment body, greatly improving the ease of installation. At the same time, it is convenient to replace a single set of vibration damping or counterweight modules during later maintenance.

[0028] 3. By flexibly adjusting the number, size, and stacking method of the counterweights, this utility model can be specifically adapted to the vibration characteristics requirements of different equipment, enhance the adaptability of the vibration absorber to various rotating fluid equipment, and avoid the problem of insufficient vibration reduction effect caused by the single counterweight specification.

[0029] 4. This utility model uses a ring array of four damping vibration reduction mechanisms and a dynamic coupling connection between the counterweight and the vibration reduction component to uniformly distribute vibration stress, improve structural stability, optimize the transmission path of vibration energy from the equipment to the vibration absorber, improve energy dissipation efficiency, and extend the service life of the equipment and the vibration absorber itself. Attached Figure Description

[0030] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0031] Figure 1 This is a schematic diagram of the structure of this utility model;

[0032] Figure 2 This is a schematic diagram of the installation of this utility model.

[0033] As shown in the figure: 10-Vibration equipment; 20-Multi-frequency vibration absorber; 201-Base; 202-Damping vibration reduction mechanism; 2021-Vibration reduction component one; 2022-Vibration reduction component two; 203-Counterweight; 2031-Counterweight one; 2032-Counterweight two; 204-Fasteners. Detailed Implementation

[0034] The present invention will now be described in further detail with reference to the accompanying drawings. Figure 1 , Figure 2As can be seen, the assembly and positioning of this device unfolds layer by layer with the vibration equipment 10 as the core carrier. The multi-frequency dynamic vibration absorber 20 is installed on the end cover of the vibration equipment 10. Its structure consists of a base 201, a damping and vibration reduction mechanism 202, and a counterweight 203. The base 201 serves as a connecting bridge and is fixed to the vibration equipment 10 by detachable fasteners 204. Matching bolt holes are provided on the vibration equipment 10, the base 201, and the counterweight 203 to ensure that each component is stably connected by the fasteners 204. There are four sets of base 201 and damping and vibration reduction mechanism 202. They can be arranged in a distributed layout in a ring array or integrated as a whole. Each set of damping and vibration reduction mechanism 202 includes a split damping and vibration reduction component 2021 and a damping and vibration reduction... Vibration damping component 2022, both rectangular in shape, are installed parallel to each other in the corresponding areas of the base 201. Counterweight 203 is divided into counterweight one 2031 and counterweight two 2032, respectively installed on top of damping vibration damping component one 2021 and component two 2022. Both can be configured as multiple sets and stacked according to actual needs. A dynamic coupling connection is used between counterweight one 2031 and damping vibration damping component one 2021, and between counterweight two 2032 and damping vibration damping component two 2022, to achieve efficient transmission and dissipation of vibration energy. Furthermore, each damping vibration damping mechanism 202 can be configured with either an arc-shaped integral damping elastic unit or a single damping elastic unit structure to further adapt to different installation scenarios and vibration suppression requirements. The overall assembly relationship, through hierarchical and modular design, ensures stable connections between components and achieves targeted suppression of multi-frequency vibrations through distributed layout, split structure, and stackable design. The detachable connection method also facilitates later maintenance and component replacement.

[0035] In one embodiment, refer to Figure 1 , Figure 2It can be seen that the multi-frequency dynamic vibration absorber structure with four sets of ring array layout is suitable for the vibration suppression requirements of the end cover of large rotating equipment 10: the four sets of bases 201 and damping vibration reduction mechanism 202 are arranged in a ring array with the axis of vibration equipment 10 as the center. Each set of bases 201 is fixedly connected to the bolt holes of the end cover of vibration equipment 10 through fasteners 204. The four sets of bases 201 and damping vibration reduction mechanism 202 can be selected as an integral structure to simplify installation. Each set of damping vibration reduction mechanism 202 adopts an arc-shaped integral damping elastic unit made of fluororubber, which is suitable for the highly corrosive environment of the chemical industry. It includes arc-shaped damping vibration reduction component one 2021 and damping vibration reduction component two 2022, which are integrally formed on the base 201. The counterweights 203 are divided into four sets, each set including counterweight one 2031 and counterweight two 2032, which are placed in a multi-set stacking manner. On the arc-shaped damping vibration reduction component, the size and number of counterweights 203 are adjusted according to the vibration frequency band of the equipment 10. For example, for the composite vibration of the chemical pump, five sets of counterweight 1 2031 and three sets of counterweight 2032 are set. During installation, the four sets of integral bases 201 and damping vibration reduction mechanisms 202 are first fixed to the end cover of the vibration equipment 10 with fasteners 204. Then, counterweight 1 2031 and counterweight 2 2032 are stacked in sequence to ensure that the bolt holes of each component are accurately aligned. The ring array layout makes the vibration stress evenly distributed and avoids local stress concentration. The four sets of damping vibration reduction mechanisms 202 can cover a wider vibration frequency band of 5-300Hz by working together. The arc-shaped structure is adapted to the circular contour of the equipment end cover, improving the space utilization rate. At the same time, the integral structure reduces the assembly gap and enhances the vibration energy transmission efficiency, effectively solving the problem of multi-directional vibration of large equipment.

[0036] In one embodiment, refer to Figure 1 , Figure 2It can be seen that, in response to the multi-frequency vibration requirements of the condensate pump vibration equipment 10 in the power field, the material and compatibility of the damping vibration reduction mechanism are optimized: the base 201 is made of aluminum alloy to reduce weight and is detachably connected to the end cover of the condensate pump 10 by fasteners 204; the damping vibration reduction mechanism 202 uses a metal spring pad and rubber composite material. The metal spring provides high stiffness support, and the rubber provides damping dissipation. It includes a split rectangular damping vibration reduction component 1 2021 and a damping vibration reduction component 2022, which are arranged parallel to each other on the base 201; the counterweight 203 is adjusted according to the condensate pump model, such as a 300MW unit condensate pump: counterweight 1 2031 uses 4 sets of stainless steel counterweights, each weighing 5kg, and counterweight 2 2032 uses 2 sets of copper counterweights, each weighing 3kg. All components are stacked on the damping and vibration reduction components, and the counterweight 203 is dynamically coupled to the damping and vibration reduction components 2021 and 2022. The installation steps are as follows: first fix the base 201, then install the composite material damping and vibration reduction components 2021 and 2022, and finally stack the counterweight 2031 and the two counterweights 2032. The metal spring and rubber composite damping and vibration reduction mechanism 202 can cope with the transient vibration below 10Hz during the start-up and shutdown of the condensate pump. The precise fit of the counterweight 203 can cover the high-frequency resonance of 200-500Hz during operation. The dynamic coupling connection ensures that the vibration energy is efficiently transferred to the counterweight and dissipated in the air. The whole system realizes vibration suppression under all operating conditions of the condensate pump. At the same time, the aluminum alloy base 201 reduces the load on the equipment, and the composite material improves the durability of the vibration reduction mechanism.

[0037] Working Principle: The complex vibrations generated during the operation of the vibrating equipment 10, such as low-frequency vibrations caused by impeller rotation, transient impacts from motor start-up and shutdown, and high-frequency resonances formed by water flow impact, are transmitted through the detachably connected base 201 to the damping and vibration reduction mechanism 202 of the multi-frequency dynamic vibration absorber 20. This mechanism includes a split rectangular or arc-shaped damping component 1 2021 and a damping component 2 2022, which respectively treat vibrations in different frequency bands. The damping component 1 2021 absorbs low-frequency vibration energy through its own elastic deformation and undergoes forced vibration in the air through multiple sets of stacked counterweights 2031 dynamically coupled to it. Energy dissipation; the second vibration damping component 2022 suppresses high-frequency resonance through its high damping characteristics, driving the second counterweight 2032 to convert energy into air friction loss at a faster vibration frequency; the four sets of ring arrays or integral bases 201 and the damping vibration damping mechanism 202 ensure uniform distribution of vibration stress and avoid local concentration. At the same time, the stacked design of multiple counterweights 203 can flexibly adjust the mass and quantity according to the vibration characteristics of the equipment, further optimizing the energy dissipation efficiency; the fasteners 204 firmly connect the vibration equipment 10, the base 201 and the counterweights 203 through matching bolt holes, ensuring the continuity of the vibration energy transmission path. To address the problem that traditional single-frequency vibration absorbers in the background technology can only handle single-frequency vibrations and cannot cope with complex vibrations, this device sets up two independent vibration damping components through a modular damping vibration reduction mechanism 202, realizing the synergistic effect of low-frequency absorption and high-frequency resonance suppression, thus breaking through the limitations of single frequency. The four sets of working modules broaden the vibration absorption frequency band, covering various vibration sources in equipment operation, such as impellers, motors, and water flow. Dynamic coupling connection and multiple sets of counterweight stacking enhance the efficiency of energy transfer and dissipation, effectively solving the problem of poor overall vibration reduction effect caused by complex vibrations, and improving the operational stability and service life of the equipment.

[0038] The preferred embodiments of the present invention have been described in detail above. However, the present invention is not limited to the specific details of the above embodiments. Within the scope of the technical concept of the present invention, various equivalent transformations can be made to the technical solutions of the present invention, and all such equivalent transformations fall within the protection scope of the present invention.

Claims

1. A multi-frequency dynamic vibration absorber, installed on a vibrating device (10) for reducing vibration, characterized in that: The multi-frequency dynamic vibration absorber (20) is installed on the vibration device (10). The multi-frequency dynamic vibration absorber (20) includes a base (201), a damping vibration reduction mechanism (202), and a counterweight (203). The base (201) is installed on the vibration device (10), the damping vibration reduction mechanism (202) is installed on the base (201), and the counterweight (203) is installed on the damping vibration reduction mechanism (202).

2. The multi-frequency dynamic vibration absorber according to claim 1, characterized in that: The damping vibration reduction mechanism (202) includes a damping vibration reduction component one (2021) and a damping vibration reduction component two (2022). Both the damping vibration reduction component one (2021) and the damping vibration reduction component two (2022) are disposed on the base (201). The counterweight (203) includes a counterweight one (2031) and a counterweight two (2032). The counterweight one (2031) is disposed on the damping vibration reduction component one (2021), and the counterweight two (2032) is disposed on the damping vibration reduction component two (2022).

3. The multi-frequency dynamic vibration absorber according to claim 1, characterized in that: The base (201) and the damping vibration reduction mechanism (202) are in four groups. The four groups of the base (201) and the damping vibration reduction mechanism (202) are arranged in a circular array, and each group of the damping vibration reduction mechanism (202) is an arc-shaped integral damping elastic unit or a single damping elastic unit.

4. The multi-frequency dynamic vibration absorber according to claim 1, characterized in that: The vibration device (10), the base (201) and the counterweight (203) are respectively provided with corresponding bolt holes, and the vibration device (10), the base (201) and the counterweight (203) are connected by fasteners (204) that match the bolt holes.

5. The multi-frequency dynamic vibration absorber according to claim 2, characterized in that: The first counterweight (2031) and the second counterweight (2032) are in multiple sets. Multiple sets of the first counterweight (2031) are stacked on the first damping vibration damping component (2021), and multiple sets of the second counterweight (2032) are stacked on the second damping vibration damping component (2022).

6. The multi-frequency dynamic vibration absorber according to claim 2, characterized in that: The first counterweight (2031) is dynamically coupled to the first damping component (2021), and the second counterweight (2032) is dynamically coupled to the second damping component (2022).

7. The multi-frequency dynamic vibration absorber according to claim 1, characterized in that: The base (201) is detachably mounted on the end cap of the vibration device (10).

8. The multi-frequency dynamic vibration absorber according to claim 3, characterized in that: The four sets of bases (201) are integrally arranged with the damping and vibration reduction mechanism (202).

9. The multi-frequency dynamic vibration absorber according to claim 2, characterized in that: The damping vibration reduction component one (2021) and the damping vibration reduction component two (2022) are split structures.

10. The multi-frequency dynamic vibration absorber according to claim 9, characterized in that: The damping and vibration reduction components one (2021) and two damping and vibration reduction components two (2022) of the split structure are rectangular in shape.

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