Low-frequency damping vibration attenuation device for elevator guide rail
By installing a low-frequency damping and vibration damping device on the elevator guide rail, changing the natural frequency and consuming vibration energy, the problem of low-frequency noise in the elevator affecting the rest area through the acoustic bridge effect is solved, and the noise is effectively weakened.
Patent Information
- Application Number
- CN202422346603.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-26
- Publication Date
- 2025-08-01
- Estimated Expiration
- 2034-09-26
AI Technical Summary
The low-frequency noise generated by elevator operation in high-rise buildings affects the acoustic environment quality of residents' rest areas through the acoustic bridge effect, and the existing technology is difficult to effectively solve.
A low-frequency damping and vibration-absorbing device for elevator guide rails is adopted, including a damping and vibration-absorbing block, fixture and rigid connections. By changing the natural frequency between the guide rail, the car and the building, vibration energy is consumed, acoustic bridge effect is avoided, and the viscoelastic characteristics of rubber is used to convert kinetic energy into thermal energy.
It effectively reduces the low-frequency noise generated by elevator operation, improves the quality of residents' rest environment, and reduces the propagation of structural noise.
Smart Images
Figure CN223175572U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of vibration reduction and noise reduction, and particularly relates to a low-frequency damping vibration reduction device for an elevator guide rail. Background Art
[0002] Most modern houses are high-rise buildings, and elevators are installed in all high-rise buildings. Due to factors such as the overall layout of some high-rise buildings, some elevators are arranged in residential rest areas with high requirements for the acoustic environment quality, such as bedrooms, studies, living rooms, etc. During the operation of the elevator, structure-borne sound and air-borne sound are often generated, thus affecting the acoustic environment quality of the resident rest area.
[0003] During the operation of the elevator, the noise is mainly divided into machine room noise and car noise according to the sound source area. Among them, the sound source equipment in the machine room includes the elevator traction main engine and the elevator control cabinet. This type of equipment is mainly arranged in a fixed room at the top of the building. The room body has certain acoustic insulation performance, and generally, a damping vibration reduction system is arranged at the bottom of the equipment in the machine room. The main sound sources of the car noise mainly include the friction noise formed between the traction steel wire rope and the traction wheel, the friction vibration noise between the car and the guide rail, and the impact noise of the balance chain. Among them, the noise caused by the friction vibration between the car and the guide rail is the main noise source of the car, and as the equipment operates, it forms a moving point sound source, and the noise is distributed throughout the elevator shaft.
[0004] The friction vibration noise between the car and the guide rail can not only radiate noise outward through the air, but also form structure-borne sound through building structural members. Usually, the guide rail in the elevator guiding system is usually fixed on the wall surface of the elevator shaft by a rigid connection method, and a guide shoe slides in the guide rail between the guide rail and the car, forming friction noise. To sum up, the car forms a rigid connection with the building, which is easy to form the "sound bridge phenomenon". When the guide shoe generates friction noise due to behaviors such as sliding and braking in the guide rail, it directly forms structure noise through sound bridge media such as the guide rail and the building main structure and transmits the noise to the indoor of the household.
[0005] During the propagation of the friction vibration noise between the car and the guide rail, since the building is usually composed of materials such as concrete, and concrete and the wall are non-uniform substances, when sound propagates in them, the non-uniform substances have a strong scattering and dissipation effect on high-frequency sound, so that the high-frequency sound attenuates quickly, forming low-frequency noise pollution. When the rest area in the building is arranged adjacent to the wall of the elevator shaft, since the bedding or rest appliances in the room are also rigidly arranged with the building, at this time, the low-frequency noise radiates to the resting personnel through the sound bridge medium, ultimately affecting the rest or sleep quality. Summary of the Invention
[0006] The purpose of the utility model is to solve the problems existing in the above-mentioned prior art, and provide a low-frequency damping vibration reduction device for an elevator guide rail.
[0007] The specific solution of the present utility model is as follows: A low-frequency damping and vibration reduction device for an elevator guide rail, which includes a bottom plate. At the front end and the rear end of the bottom plate, a damping and vibration reduction block is installed respectively. On each of the two damping and vibration reduction blocks, a fixing member is installed. The fixing member is connected to the bottom plate and is used to fix and limit the damping and vibration reduction block. A rigid connecting member is inserted between the two damping and vibration reduction blocks. On the left and right sides of the middle part of the rigid connecting member, a connecting plate is fixedly connected respectively. The connecting plate extends outwards and is provided with a connecting hole, and the connecting plate is used to connect with the elevator guide rail.
[0008] Further, the damping and vibration reduction block includes a rubber block and a rubber pad. The bottom of the rubber block contacts the bottom plate, and the rubber pad is laid on the top surface of the rubber block.
[0009] Further, the rigid connecting member is a flat tube. The two ends of the flat tube are respectively inserted into the two damping and vibration reduction blocks, and the connecting plate is welded to the bottom surface or the top surface of the flat tube.
[0010] Further, the fixing member includes a U-shaped bracket A. At both ends of the U-shaped bracket A, a support plate is provided respectively. The support plate is connected to the bottom plate by bolts, and the U-shaped bracket A is buckled on the damping and vibration reduction block.
[0011] Further, the fixing member further includes a U-shaped bracket B. The U-shaped bracket B is perpendicular to the U-shaped bracket A. The U-shaped bracket B wraps around the periphery of the damping and vibration reduction block, and the bottom of the U-shaped bracket B is welded to the bottom plate.
[0012] Further, it further includes a U-shaped outer shell. The U-shaped outer shell covers the bottom plate, and the fixing member and the damping and vibration reduction block are both arranged inside the U-shaped outer shell.
[0013] The present utility model has the following beneficial effects: Install the present utility model in the elevator shaft, connect the connecting plate with the elevator guide rail, and connect the bottom plate with the wall surface, so that the natural frequency among the guide rail, the car and the building is changed, thereby reducing the resonance frequency and avoiding the generation of the sound bridge effect; at the same time, the vibration formed between the guide rail and the car is consumed through the internal friction effect of the damping and vibration reduction block to achieve the purpose of consuming vibration energy, thereby reducing the structural noise caused by vibration. Description of the Drawings
[0014] Figure 1 is the three-dimensional view of the present utility model;
[0015] Figure 2 is the front view of the present utility model;
[0016] Figure 3 is Figure 2 the B-B view of
[0017] In the figure: 1. Bottom plate; 2. Bolt; 3. Connecting plate; 4. Flat tube; 5. Rubber block; 6. U-shaped housing; 7. U-shaped bracket A; 8. Rubber pad; 9. U-shaped bracket B. Detailed implementation mode
[0018] See Figures 1-3 , this embodiment is a low-frequency damping and vibration reduction device for elevator guide rails, including a bottom plate 1. At the front end and the rear end of the bottom plate 1, a damping and vibration reduction block is installed respectively. A fixing member is installed on each of the two damping and vibration reduction blocks, and the fixing member is connected to the bottom plate 1. The fixing member is used to fix and limit the damping and vibration reduction block. A rigid connecting member is inserted between the two damping and vibration reduction blocks. On the left and right sides of the middle part of the rigid connecting member, a connecting plate 3 is fixedly connected respectively. The connecting plate 3 extends outwards, and a connecting hole is provided on the connecting plate 3. The connecting plate 3 is used to connect with the elevator guide rail. Further, the damping and vibration reduction block includes a rubber block 5 and a rubber pad 8. The bottom of the rubber block 5 contacts the bottom plate 1, and the rubber pad 8 is laid on the top surface of the rubber block 5. Further, the rigid connecting member adopts a flat tube 4, and both ends of the flat tube 4 are respectively inserted into the two damping and vibration reduction blocks, and the connecting plate 3 is welded to the bottom surface or the top surface of the flat tube 4. Further, the fixing member includes a U-shaped bracket A7. At both ends of the U-shaped bracket A7, a support plate is provided respectively. The support plate is connected to the bottom plate 1 through a bolt 2. The U-shaped bracket A7 is buckled on the damping and vibration reduction block to limit the displacement of the damping and vibration reduction block in the vertical direction. Further, the fixing member further includes a U-shaped bracket B9. The U-shaped bracket B9 is perpendicular to the U-shaped bracket A7. The U-shaped bracket B9 wraps around the periphery of the damping and vibration reduction block to limit the displacement of the damping and vibration reduction block in the horizontal direction. The bottom of the U-shaped bracket B9 is welded to the bottom plate 1. Further, a U-shaped housing 6 is further included. The U-shaped housing 6 covers the bottom plate 1, and the fixing member and the damping and vibration reduction block are both arranged inside the U-shaped housing 6. During installation, the bottom plate 1 of the present utility model is fixed to the wall surface of the elevator shaft, and the connecting plate 3 is connected and fixed to the guide rail. When the elevator runs, the damping characteristics and lower natural frequency of the rubber block 5 and the rubber pad 8 are utilized to avoid the generation of the sound bridge effect. At the same time, based on the viscoelastic characteristics of rubber, the external force generated by the vibration of the guide rail during the operation of the elevator causes intense internal friction inside the rubber block 5, generating a reaction force, thereby converting kinetic energy into heat energy, realizing the conversion of energy, and achieving the purpose of reducing the amplitude.
Claims
1. A low-frequency damping and vibration reduction device for elevator guide rails, characterized in that: It includes a bottom plate, with a damping and vibration reduction block installed at each of the front end and the rear end on the bottom plate. A fixing member is installed on each of the two damping and vibration reduction blocks, and the fixing member is connected to the bottom plate. The fixing member is used to fix and limit the damping and vibration reduction block. A rigid connecting member is inserted between the two damping and vibration reduction blocks. A connecting plate is fixedly connected to each of the left side and the right side of the middle part of the rigid connecting member. The connecting plate extends outwards, and a connecting hole is provided on the connecting plate. The connecting plate is used to connect with the elevator guide rail.
2. The low-frequency damping and vibration reduction device for an elevator guide rail according to claim 1, wherein: The damping and vibration reduction block includes a rubber block and a rubber pad. The bottom of the rubber block contacts the bottom plate, and the rubber pad is laid on the top surface of the rubber block.
3. The low-frequency damping and vibration reduction device for an elevator guide rail according to claim 1, characterized in that: The rigid connecting member is a flat tube. The two ends of the flat tube are respectively inserted into the two damping and vibration reduction blocks, and the connecting plate is welded to the bottom surface or the top surface of the flat tube.
4. The low-frequency damping and vibration reduction device for an elevator guide rail according to claim 1, wherein: The fixing member includes a U-shaped bracket A. A support plate is provided at each end of the U-shaped bracket A. The support plate is connected to the bottom plate by bolts, and the U-shaped bracket A is buckled on the damping and vibration reduction block.
5. The low-frequency damping and vibration reduction device for an elevator guide rail according to claim 4, characterized in that: The fixing member further includes a U-shaped bracket B. The U-shaped bracket B is perpendicular to the U-shaped bracket A. The U-shaped bracket B wraps around the periphery of the damping and vibration reduction block, and the bottom of the U-shaped bracket B is welded to the bottom plate.
6. The low-frequency damping and vibration reduction device for an elevator guide rail according to claim 1, characterized in that: It further includes a U-shaped outer shell. The U-shaped outer shell covers the bottom plate, and the fixing member and the damping and vibration reduction block are both arranged inside the U-shaped outer shell.