Motor vibration isolation damper
By combining foundation vibration isolation and motor vibration reduction components and utilizing vibration isolation and tuning vibration reduction mechanisms, the problem of poor vibration suppression of motors under complex working conditions is solved, achieving all-round vibration suppression and noise reduction, and is suitable for large and medium-sized industrial motors.
Patent Information
- Application Number
- CN202422119111.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-30
- Publication Date
- 2025-09-19
- Estimated Expiration
- 2034-08-30
AI Technical Summary
Existing motor vibration reduction devices are difficult to effectively suppress vibration and impact at the same time under complex working conditions, especially in low-frequency vibration conditions, resulting in poor vibration isolation effect.
A motor vibration isolation and vibration damper is designed. It combines the basic vibration isolation component and the motor vibration damping component, and uses the vibration isolation spring, vibration isolation viscous fluid and tuning spring, tuning mass block and tuning viscous fluid to achieve all-round vibration suppression through a multi-stage vibration reduction mechanism.
It realizes multi-stage vibration reduction of the foundation platform and the motor, improves the stability and reliability of the motor operation, reduces vibration and noise, and is suitable for the foundation vibration isolation of large and medium-sized industrial motors and the rotation vibration reduction of the motor itself.
Smart Images
Figure CN223363951U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of motor vibration reduction, in particular to a motor vibration isolation and vibration damper. Background Art
[0002] Motors generate vibration and noise during operation, which not only affects the performance and life of the motor itself, but also has adverse effects on surrounding machinery and buildings. To mitigate these negative effects, a vibration damping device is usually installed between the motor and the base.
[0003] Currently, most motor vibration reduction devices on the market only offer vibration isolation or vibration reduction. Independent vibration isolation can effectively isolate motor vibrations and reduce their impact on the surrounding environment. However, under certain operating conditions, such as motor startup or sudden load changes, relying solely on vibration isolation can be difficult to effectively suppress large vibrations and impacts, resulting in poor vibration isolation. Independent vibration reduction can absorb and attenuate vibrations to a certain extent, reducing their amplitude. However, in practice, vibration reduction alone often cannot completely eliminate motor vibrations, especially in low-frequency vibrations, where its effectiveness is limited.
[0004] Therefore, when faced with complex changes in working conditions, a vibration reduction device with only a single function is difficult to achieve ideal vibration isolation and vibration reduction effects. Summary of the Invention
[0005] To address the aforementioned technical issues, the present invention provides a motor vibration isolation and damping device. To provide a basic understanding of some aspects of the disclosed embodiments, a brief summary is provided below. This summary is not intended to be a comprehensive review, identify key or important components, or delineate the scope of protection for these embodiments. Its sole purpose is to present some concepts in a simplified form, serving as a prelude to the detailed description that follows.
[0006] The utility model adopts the following technical solutions:
[0007] Provided is a motor vibration isolation and vibration damper, comprising: an upper cover plate, a lower base plate, and a basic vibration isolation assembly and a motor vibration damping assembly arranged between the upper cover plate and the lower base plate;
[0008] The basic vibration isolation assembly includes: a vibration isolation spring and a first container containing a vibration isolation viscous liquid, wherein the first container is disposed on the lower base plate, the top end of the vibration isolation spring is connected to the upper cover plate, and the bottom end of the vibration isolation spring is connected to the inner bottom wall of the first container;
[0009] The motor vibration reduction assembly includes: a tuning spring, a tuning mass block and a second container containing a tuning viscous fluid, the second container is arranged on the lower substrate, the tuning spring is arranged on the upper cover plate, the tuning mass block is connected to the tuning spring, and the tuning mass block is located in the second container.
[0010] Furthermore, the motor vibration reduction assembly also includes: a guide cylinder, a piston plate and a pull rod; the guide cylinder is arranged on the upper cover plate, the piston plate and the tuning spring are both arranged in the guide cylinder, and the two ends of the tuning spring are respectively connected to the piston plate and the inner bottom wall of the guide cylinder; the top end of the pull rod is connected to the piston plate, and the bottom end of the pull rod extends from the lower opening of the guide cylinder and is connected to the tuning mass block.
[0011] Furthermore, a first enclosure is provided on the upper surface of the lower substrate to form the first container with an upper opening; a second enclosure is provided on the upper surface of the lower substrate on the inner side of the first enclosure to form the second container with an upper opening; the vibration-isolating viscous liquid is located in the space formed by the outer wall of the second container, the inner wall of the first container and the upper surface of the lower substrate.
[0012] Furthermore, the kinematic viscosity coefficient of the vibration isolation viscous fluid is greater than the kinematic viscosity coefficient of the tuning viscous fluid.
[0013] Furthermore, upper connecting bolts are provided at the four corners of the upper cover plate, and lower connecting bolts are provided at the four corners of the lower base plate.
[0014] Furthermore, the bottom end of the pull rod is provided with an external thread, the tuning mass block is provided with a column hole, the column hole is provided with an internal thread, and the pull rod is threadedly connected to the tuning mass block.
[0015] Furthermore, the bottom end of the guide cylinder is located in the second container, and the vibration isolation spring is sleeved on the outside of the guide cylinder and the second container.
[0016] Furthermore, a third enclosure plate is provided on the lower surface of the upper cover plate to form a sleeve with a lower opening, and the top end of the vibration isolation spring is provided in the sleeve.
[0017] The beneficial effects brought by the utility model are:
[0018] 1. Combining foundation vibration isolation and motor vibration reduction can not only effectively suppress the first-order resonance of the foundation platform, but also tune and reduce the vibration of the specific frequency generated by the motor, providing a full range of vibration isolation and vibration reduction effects. It is more suitable for foundation vibration isolation of large and medium-sized industrial motors and rotation vibration reduction of the motor itself;
[0019] 2. By integrating the foundation vibration isolation component and the motor vibration reduction component into one device, the required space is reduced, making the entire system more compact and the structure more stable;
[0020] 3. The combination of vibration isolation springs and vibration isolation viscous fluid can effectively isolate the vibration of the base platform. The tuning springs and tuning mass blocks tune and reduce the vibration of the motor, achieving multi-level vibration reduction and doubly ensuring the vibration reduction effect. BRIEF DESCRIPTION OF THE DRAWINGS
[0021] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.
[0022] Figure 1 This is a three-dimensional diagram of a motor vibration isolation and vibration damper of the utility model;
[0023] Figure 2 This is a schematic diagram of the external structure of a motor vibration isolation and vibration damper of the utility model;
[0024] Figure 3 This is a schematic diagram of the internal structure of a motor vibration isolation and vibration damper of the utility model;
[0025] Figure 4 It is a structural schematic diagram of the upper cover plate of the utility model. DETAILED DESCRIPTION
[0026] The following describes the embodiments of the present invention in detail with reference to the accompanying drawings. It should be understood that the embodiments described are only a portion of the embodiments of the present invention, and not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without inventive effort are within the scope of protection of the present invention.
[0027] like Figure 1-4 As shown, in some illustrative embodiments, a motor vibration isolation and vibration damper designed for the basic vibration isolation of large and medium-sized industrial motors and the rotation vibration reduction of the motor itself is provided, specifically including: an upper cover plate 1, a lower base plate 2, a basic vibration isolation assembly and a motor vibration reduction assembly.
[0028] The foundation isolation assembly is used to isolate the motor from vibrations transmitted between the motor and the foundation or other supporting structure. The motor damping assembly is used to reduce the motor's rotational vibrations, specifically reducing vibrations generated during rotation. These two components are located between the upper cover plate 1 and the lower base plate 2, forming the core of the motor vibration isolation system.
[0029] Upper connecting bolts 9 are set at the four corners of the upper cover plate 1, and the upper connecting bolts 9 are used to connect to the base of the motor. Lower connecting bolts 10 are set at the four corners of the lower base plate 2, and the lower connecting bolts 10 are used to connect to the foundation or other supporting table surface to provide a stable support base for the motor vibration isolation and vibration damper.
[0030] Depending on the motor size and vibration isolation requirements, different numbers of motor vibration isolation dampers can be installed to suit different application scenarios. Motor vibration isolation dampers combine basic vibration isolation with motor vibration reduction. By reducing vibration and shock, they improve the stability and reliability of motor operation, while also reducing noise generated during motor operation and improving the working environment.
[0031] The basic vibration isolation assembly includes: a vibration isolation spring 3 and a first container 11 containing a vibration isolation viscous liquid 4.
[0032] The first container 11 is arranged on the lower base plate 2, the top end of the vibration isolation spring 3 is connected to the upper cover plate 1, and the bottom end of the vibration isolation spring 3 is connected to the inner bottom wall of the first container 11 and extends into the vibration isolation viscous liquid 4. The main function of the vibration isolation spring 3 is to provide elastic support. It can absorb and store vibration energy and change its potential energy through deformation during the vibration process. The function of the vibration isolation viscous liquid 4 is to provide damping, that is, to consume vibration energy through the friction generated by the flow of liquid. When the vibration isolation spring 3 expands and contracts with the vibration, it will drive the liquid to flow. This flow will generate resistance, thereby consuming part of the vibration energy.
[0033] The isolation springs 3 and the motor together form a large tuned mass system, which suppresses the first-order resonance of the foundation platform by adjusting its own natural frequency. The isolation viscous fluid 4 provides additional damping, helping to reduce vibration amplitude and accelerate vibration attenuation. Most of the vibration energy is absorbed and dissipated by the foundation isolation assembly, significantly reducing the vibration energy transmitted to the foundation.
[0034] The motor vibration reduction assembly includes: a tuning spring 5 , a tuning mass block 6 , a second container 77 containing a tuning viscous fluid 7 , a guide cylinder 66 , a piston plate 55 and a pull rod 8 .
[0035] A second container 77 is mounted on the lower base plate 2 and contains a tuning viscous fluid 7. The tuning mass 6 is located within the second container 77 and immersed in the tuning viscous fluid 7. The tuning viscous fluid 7 damps the movement of the tuning mass 6, dissipating vibration energy through friction generated by the fluid flow. A tuning spring 5 is mounted on the upper cover plate 1. Specifically, a guide cylinder 66 is mounted on the lower surface of the upper cover plate 1. The piston plate 55 and the tuning spring 5 are both mounted within the guide cylinder 66. The ends of the tuning spring 5 are connected to the inner bottom walls of the piston plate 55 and the guide cylinder 66, respectively.
[0036] The top of the pull rod 8 is connected to the piston plate 55, while the bottom of the pull rod 8 extends from the lower opening of the guide cylinder 66 and connects to the tuning mass 6. The guide cylinder 66 provides guidance for the piston plate 55, ensuring its vertical movement. Under the action of the tuning mass 6, the piston plate 55 moves up and down with vibration, with the tuning spring 5 providing elastic support. When the motor vibrates, the vibration energy is transferred to the piston plate 55 via the tuning spring 5. The piston plate 55 begins to move up and down within the guide cylinder 66. The movement of the piston plate 55 is transmitted to the tuning mass 6 via the pull rod 8, causing the tuning mass 6 to move in the tuning viscous fluid 7. The movement of the tuning mass 6 in the tuning viscous fluid 7 generates fluid resistance, thereby dissipating the vibration energy and reducing the vibration amplitude.
[0037] The tuning mass block 6 and the tuning spring 5 form a smaller tuning mass system, which suppresses the first-order resonance of the motor. When the system is vibrated, the tuning mass block 6 can move in the tuning viscous fluid 7, thereby absorbing the vibration energy. The tuning viscous fluid 7 plays a damping and energy-consuming role, preventing the vibration of the motor itself from being transmitted to the motor platform.
[0038] The kinematic viscosity coefficient of the vibration isolation viscous fluid 4 is greater than that of the tuning viscous fluid 7 to match the requirements of the vibration isolation frequency and the vibration damping frequency. The vibration isolation viscous fluid 4 provides greater fluid resistance to better dissipate the vibration energy in the motor vibration isolation damper, while the tuning viscous fluid 7 provides less fluid resistance, which is required to allow the tuning mass 6 to move more freely during vibration in order to achieve the best tuning effect. That is, the high viscosity of the vibration isolation viscous fluid 4 helps to quickly dissipate vibration energy and reduce the vibration transmitted to the foundation, while the low viscosity of the tuning viscous fluid 7 helps the motor vibration isolation damper respond to vibrations of a specific frequency, thereby reducing the vibration amplitude. In this way, the two viscous fluids each play an important role, and together ensure the efficient operation of the entire vibration isolation damper.
[0039] The bottom end of tie rod 8 is externally threaded, and tuning mass 6 is provided with a post hole 88, which is internally threaded. Tie rod 8 is threadedly connected to tuning mass 6. This threaded connection allows for quick and easy assembly of tie rod 8 and tuning mass 6, ensuring a secure connection between them, even in vibrating environments. Furthermore, if tuning mass 6 needs to be replaced, the threaded connection design makes disassembly and reassembly simple.
[0040] The lower baseplate 2 is the bottom support of the entire device, used to support all components. A first enclosure is provided on the upper surface of the lower baseplate 2 to form an upper-open first container 11. The first enclosure serves as the sidewall of the first container 11. The sidewalls formed by the first enclosure and the upper surface of the lower baseplate 2 together form an upper-open cylindrical container barrel. This cylindrical container barrel is used to hold the vibration isolation viscous fluid 4 and secure the bottom end of the vibration isolation spring 3.
[0041] A second enclosure is provided on the upper surface of the lower baseboard 2, inside the first enclosure, to form an upper-open second container 77. The second enclosure serves as a sidewall and, together with the upper surface of the lower baseboard 2, encloses a smaller, upper-open container space. This container space is used to accommodate the tuning viscous fluid 7 and the tuning mass 6. The second container 77 is located within the first container 11. The vibration-isolating viscous fluid 4 is located within the space enclosed by the outer wall of the second container 77, the inner wall of the first container 11, and the upper surface of the lower baseboard 2.
[0042] Using the same lower substrate 2 as the bottom plate of the first container 11 and the second container 77 can simplify the structure, reduce material usage, and reduce the overall weight. In addition, since the same substrate is used as the bottom plate, the processing technology can be simplified and the manufacturing cost can be reduced.
[0043] A third enclosure is provided on the lower surface of the upper cover 1 to form a sleeve 22 with a lower opening. The top end of the vibration isolation spring 3 is disposed within the sleeve 22. Providing the sleeve 22 on the lower surface of the upper cover 1 provides a more stable support for the vibration isolation spring 3. The bottom end of the guide tube 66 is located within the second container 77, and the vibration isolation spring 3 is sleeved outside the guide tube 66 and the second container 77.
[0044] The stiffness coefficient K3 of the vibration isolation spring 3 should meet the following conditions:
[0045]
[0046] The unit of K3 is N / m; N is the number of vibration isolation devices; G is the motor's own weight, in kg; ω1 is the first-order natural circular frequency of the motor's basic vibration;
[0047] The stiffness coefficient K5 of the tuning spring 5 should meet the following conditions:
[0048]
[0049] The unit of K5 is N / m; M is the mass of the tuning mass block, in kg; m is the mass of the motor, in kg; ω2 is the operating circular frequency of the motor.
[0050] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present invention should be included in the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be based on the scope of protection of the claims.
Claims
1. A motor vibration isolation and vibration damper, characterized in that: include: An upper cover plate, a lower base plate, and a basic vibration isolation assembly and a motor vibration reduction assembly arranged between the upper cover plate and the lower base plate; The basic vibration isolation assembly includes: a vibration isolation spring and a first container containing a vibration isolation viscous liquid, wherein the first container is disposed on the lower base plate, the top end of the vibration isolation spring is connected to the upper cover plate, and the bottom end of the vibration isolation spring is connected to the inner bottom wall of the first container; The motor vibration reduction assembly includes: a tuning spring, a tuning mass block and a second container containing a tuning viscous fluid, the second container is arranged on the lower substrate, the tuning spring is arranged on the upper cover plate, the tuning mass block is connected to the tuning spring, and the tuning mass block is located in the second container.
2. The motor vibration isolation and vibration damper according to claim 1, characterized in that: The motor vibration reduction assembly also includes: a guide cylinder, a piston plate and a pull rod; the guide cylinder is arranged on the upper cover plate, the piston plate and the tuning spring are both arranged in the guide cylinder, and the two ends of the tuning spring are respectively connected to the piston plate and the inner bottom wall of the guide cylinder; the top end of the pull rod is connected to the piston plate, and the bottom end of the pull rod extends from the lower opening of the guide cylinder and is connected to the tuning mass block.
3. The motor vibration isolation and vibration damper according to claim 2, characterized in that: A first enclosure is provided on the upper surface of the lower substrate to form the first container with an upper opening; a second enclosure is provided on the upper surface of the lower substrate on the inner side of the first enclosure to form the second container with an upper opening; the vibration-isolating viscous liquid is located in a space formed by the outer wall of the second container, the inner wall of the first container and the upper surface of the lower substrate.
4. The motor vibration isolation and vibration damper according to claim 3, characterized in that: The kinematic viscosity coefficient of the vibration isolation viscous fluid is greater than the kinematic viscosity coefficient of the tuning viscous fluid.
5. The motor vibration isolation and vibration damper according to claim 4, characterized in that: Upper connecting bolts are arranged at the four corners of the upper cover plate, and lower connecting bolts are arranged at the four corners of the lower base plate.
6. The motor vibration isolation and vibration damper according to claim 5, characterized in that: The bottom end of the pull rod is provided with an external thread, the tuning mass block is provided with a column hole, the column hole is provided with an internal thread, and the pull rod is threadedly connected to the tuning mass block.
7. The motor vibration isolation and vibration damper according to claim 6, characterized in that: The bottom end of the guide cylinder is located in the second container, and the vibration isolation spring is sleeved on the outside of the guide cylinder and the second container.
8. The motor vibration isolation and vibration damper according to claim 7, characterized in that: A third enclosure plate is provided on the lower surface of the upper cover plate to form a sleeve with a lower opening, and the top end of the vibration isolation spring is provided in the sleeve.