A high-speed elevator car damping mechanism

Abstract

The utility model provides a kind of high-speed elevator car damping mechanism, it is related to elevator equipment technical field, specifically discloses the technical defects that single damping device of existing high-speed elevator cannot cope with complex vibration, the utility model is by setting by rubber shock-absorbing rubber pad, U type spring steel, double damping structure of pad and weighing sensor combination by bolt, the effective absorption of high-frequency, low-frequency vibration generated when high-speed elevator runs is realized, especially the attenuation effect of vertical vibration is remarkable, substantially improve car ride comfort and operating stability. The utility model structure design is reasonable, installation is convenient, it is applicable to the high-speed elevator of speed≤10m / s, with good practicality and popularization value.

Description

Technical Field

[0001] This utility model relates to the field of elevator equipment technology, and in particular to a high-speed elevator car vibration damping mechanism for use in high-speed elevator cars in high-rise buildings. Background Technology

[0002] As the core vertical transportation tool in multi-story and super high-rise buildings, elevators directly affect the building's utilization efficiency through their operating efficiency and passenger experience. With the rapid development of super high-rise buildings, the operating speed of ordinary elevators (1.0 to 2.5 m / s) can no longer meet the high-efficiency transportation needs of super high-rise buildings. High-speed elevators with operating speeds of up to 10 m / s have emerged, effectively shortening the vertical transportation time within super high-rise buildings.

[0003] The stable operation of an elevator car relies on the effective support of vibration damping devices. In existing technologies, elevator car vibration damping solutions typically employ a single rubber base structure. This structure absorbs vibration energy through the elastic deformation of rubber, which can meet basic vibration damping requirements in the low-to-medium speed operation of ordinary elevators. However, during the operation of high-speed elevators, due to the high speed and large fluctuations in car load, more complex vibration conditions arise, including the superposition of high-frequency and low-frequency vibrations and a significant increase in vertical vibration amplitude. The vibration damping performance of a single rubber base has inherent defects: on the one hand, the rubber material has limited absorption capacity for high-frequency vibrations, easily leading to the transmission of vibration energy to the car; on the other hand, the elastic recovery speed of rubber is difficult to match the vibration frequency changes of high-speed elevators, failing to effectively attenuate low-frequency, large-amplitude vibrations, ultimately causing significant car swaying, severely affecting passenger comfort, and even causing discomfort. Therefore, existing single rubber vibration damping devices can no longer meet the complex vibration damping requirements of high-speed elevators, and a new type of vibration damping mechanism adapted to the vibration characteristics of high-speed elevators is urgently needed. Utility Model Content

[0004] The purpose of this invention is to provide a high-speed elevator car vibration damping mechanism, which solves the problem that the existing single rubber base vibration damping mechanism of elevators cannot effectively attenuate the aforementioned complex vibrations of high-speed elevators.

[0005] The technical solution adopted by this utility model is: a high-speed elevator car vibration damping mechanism, including a rubber vibration damping device set at the bottom of the car. The key technical point is: the rubber vibration damping device consists of two rows of rubber vibration damping pads set on the horizontal sides of the bottom of the car. The upper and lower ends of the rubber vibration damping pads are respectively vulcanized and bonded with an upper connecting steel plate and a lower connecting steel plate. The upper connecting steel plate is fixedly connected to the channel steel beam at the bottom of the car with bolts. The lower connecting steel plate is connected to the upper elastic steel plate of the U-shaped spring steel through a pad with bolts. The lower elastic steel plate of the U-shaped spring steel is connected to a weighing sensor with bolts. The weighing sensor is installed on the car bracket.

[0006] The upper and lower connecting steel plates of the rubber damping pad are provided with bolt fixing eaves extending from the edge of the rubber damping pad. The rubber damping pad is set in the groove of the channel steel beam. The upper flange of the channel steel beam is suspended and fixed by bolts passing through the fixing holes of the bolt fixing eaves of the upper connecting steel plate. The U-shaped opening of the U-shaped spring steel is placed opposite to the groove of the channel steel beam. The upper elastic steel plate of the U-shaped spring steel is arranged in the groove of the channel steel beam and spaced apart from the lower flange of the channel steel beam.

[0007] The two rows of rubber shock-absorbing pads are each symmetrically arranged with at least three sets of rubber shock-absorbing pads and U-shaped spring steel.

[0008] The advantages and beneficial effects of this utility model are as follows: This utility model features dual shock absorption with synergistic effect: through the combined design of rubber shock-absorbing pads and U-shaped spring steel, the rubber shock-absorbing pads mainly absorb high-frequency vibrations during high-speed elevator operation, while the U-shaped spring steel mainly attenuates low-frequency, large-amplitude vibrations. The two work synergistically to achieve effective absorption of complex vibrations across the entire frequency range, improving the shock absorption effect by more than 40% compared to a single shock-absorbing structure, significantly improving the comfort of the elevator car. Strong structural stability: the vulcanized bonded steel plates at the upper and lower ends of the rubber shock-absorbing pads enhance the connection rigidity with surrounding components. The integrated structure of the U-shaped spring steel ensures the stability of elastic deformation, avoiding resonance. Simultaneously, the spaced intervals provide ample deformation space for the rubber shock-absorbing pads, increasing shock absorption redundancy. Good load adaptability: the weighing sensor allows for real-time monitoring of the car load, facilitating dynamic adjustment of operating parameters by the elevator control system based on load changes, further optimizing the shock absorption effect and improving elevator operation safety. Convenient installation and strong versatility: the overall structure uses bolted connections, making assembly and disassembly convenient. Therefore, it can effectively adapt to the vibration characteristics of high-speed elevators, and has a low manufacturing cost, making it easy to scale up and promote. Attached Figure Description

[0009] The present invention will be further described below with reference to the accompanying drawings.

[0010] Figure 1 This is a schematic diagram of the assembly of the rubber shock-absorbing pad and the U-shaped spring steel according to an embodiment of this utility model; Figure 2 This is a schematic diagram of the overall structure of an embodiment of this utility model; Figure 3 This is a schematic diagram of the transverse cross-section of the present invention located at the bottom of the car; Figure 4 This is a schematic diagram of the structure of this utility model installed on one side of the bottom of the car.

[0011] The numbers in the diagram are explained as follows: 1. Upper connecting steel plate; 2. Rubber shock-absorbing pad; 3. Lower connecting steel plate; 4. U-shaped spring steel; 41. Upper elastic steel plate; 42. Lower elastic steel plate; 5. Bolt; 6. Bolt fixing eaves; 7. Pad plate; 8. Channel steel beam; 81. Upper flange; 82. Lower flange; 83. Spacing; 9. Weighing sensor; 10. Bracket. Detailed Implementation

[0012] according to Figures 1 to 4 The technical solution of this utility model is described in detail to ensure that those skilled in the art can completely reproduce the technical solution of this utility model. Examples of implementation are provided. Figure 1 As shown, a high-speed elevator car vibration damping mechanism is constructed by combining a rubber vibration damping device and a U-shaped spring steel 4 at the bottom of the car. The main body of the rubber vibration damping device is a rubber damping pad 1. Steel plates are bonded to both the upper and lower surfaces of the rubber damping pad via a vulcanization process, forming an upper connecting steel plate 1 and a lower connecting steel plate 3. The rubber damping pad 2 can be 150mm × 100mm × 80mm (length × width × height) and is made of nitrile rubber, possessing good elastic recovery and fatigue resistance. The upper connecting steel plate 1 and the lower connecting steel plate 3 can be made of Q235 steel with a thickness of 6-8mm. The dimensions are compatible with the rubber shock-absorbing pads. Bolt fixing eaves 6 extend from both ends laterally, and bolt fixing holes are provided on the bolt fixing eaves. The U-shaped spring steel 4 is a horizontally arranged integrated structure with an upper elastic steel plate 41 at the top and a lower elastic steel plate 42 at the bottom. The upper elastic steel plate 41 and the lower elastic steel plate 42 are connected by an elastic arc transition section. Bolt fixing holes are provided near the end. The radius of the arc transition section is 50mm. It is made of 65Mn spring steel, and the elastic deformation range is compatible with the vibration amplitude of high-speed elevators.

[0013] like Figures 2 to 4 As shown, a pad 7 is installed between the U-shaped spring steel 4 and the lower connecting steel plate 3 via bolts 5. A weighing sensor 9 is installed on the car bracket 10 below the U-shaped spring steel 4 via bolts 5. The pad 7 is a rectangular metal plate made of Q235 steel with a thickness of 8~12mm. The end face has mounting holes that fit the bolts 5 to achieve a rigid connection between the rubber shock-absorbing pad and the U-shaped spring steel. The weighing sensor 9 is a pressure sensor. Its upper end is fixedly connected to the lower elastic steel plate 42 of the U-shaped spring steel 4 via bolts 5, and its lower end is used to connect to the bracket 10 below the elevator car for real-time monitoring of changes in the car load. The bolts 5 can be M12×50 high-strength bolts.

[0014] The assembly relationship of the shock absorption device of this utility model is as follows: An upper connecting steel plate 1 is fixedly connected to the channel steel beams 8 on both sides of the bottom of the car using bolts 5. A lower connecting steel plate 3 is connected to the upper elastic steel plate 41 of the U-shaped spring steel 4 via a pad 7 using bolts 5. The lower elastic steel plate 42 of the U-shaped spring steel 4 is connected to the weighing sensor 9 using bolts 5. The upper connecting steel plate 1 and the lower connecting steel plate 3 of the rubber shock absorber 2 are provided with bolt fixing eaves 6 extending beyond the edge of the rubber shock absorber. The rubber shock absorber 2 is placed inside the groove of the channel steel beam 8, and the upper flange 81 of the channel steel beam 8 is suspended and fixed using bolts 5 passing through the fixing holes of the bolt fixing eaves 6 of the upper connecting steel plate 1. The U-shaped opening of the U-shaped spring steel 4 is staggered relative to the groove opening of the channel steel beam 8. The upper elastic steel plate 41 of the U-shaped spring steel 4 is arranged inside the groove of the channel steel beam, leaving a 5-10mm gap with the lower flange 82 of the channel steel beam. The interval space 83 forms an elastic deformation space for the U-shaped spring steel and rubber shock-absorbing pad, and the thickness of the pad 7 can be set to adjust the interval 83.

[0015] As a further improvement, each of the two rows of rubber shock-absorbing pads on both sides of the bottom of the car is symmetrically equipped with at least three sets of evenly distributed rubber shock-absorbing pads 2 and U-shaped spring steel 4 to ensure balanced force distribution.

[0016] This utility model can be assembled by bolts. After installation, the high-speed elevator is tested under no-load and full-load (80% of rated load). The elevator running speed is set to 10m / s. The vibration amplitude of the car is monitored by vibration sensors: the vibration amplitude is ≤0.1mm when no-load and ≤0.15mm when fully loaded. Compared with the existing single rubber shock absorption structure (vibration amplitude ≥0.3mm), the shock absorption effect is significantly improved, there is no obvious shaking in the car, and the passenger riding experience is good.

[0017] The high-speed elevator car vibration damping mechanism of this invention achieves efficient vibration damping through a working mode of "dual vibration attenuation + dynamic load adaptation". The specific working principle is as follows: Vibration transmission path: When the elevator is running, the traction mechanism drives the bracket 10 to move up and down. The vibration generated by the bracket 10 is transmitted to the U-shaped spring steel 4 through the weighing sensor 9, then to the rubber damping pad 2 through the pad 7, and finally to the bottom of the car through the rubber damping pad 2. The vibration energy is attenuated step by step during the transmission process. Dual damping effect: High-frequency vibration attenuation: When high-frequency vibrations (frequency ≥ 50Hz) generated during high-speed elevator operation are transmitted to the rubber damping pad 2, the rubber damping pad 2 quickly absorbs the high-frequency vibration energy through its own elastic deformation, and uses the internal friction of the rubber material to convert the vibration energy into heat energy for dissipation, achieving rapid attenuation of high-frequency vibration; Low-frequency vibration attenuation: When low-frequency large-amplitude vibrations (frequency ≤ 20Hz) are transmitted to the U-shaped spring steel 4, the upper elastic steel plate 41 and the lower elastic steel plate 42 of the U-shaped spring steel 4 undergo elastic deformation. The arc-shaped transition section buffers the vibration impact force, and the elastic restoring force of the spring steel offsets the amplitude of the low-frequency vibration, achieving effective attenuation of low-frequency vibration; Load dynamic The system is adaptable to various conditions. The weighing sensor 9 monitors the load changes of the car in real time and transmits the load signal to the elevator control system. When the load increases, the control system adjusts the elevator's acceleration and deceleration accordingly. At the same time, the elastic deformation of the U-shaped spring steel 4 adapts to the load changes, ensuring a stable damping effect under different load conditions. The structural stability is guaranteed. The connecting steel plates at the upper and lower ends of the rubber damping pad 2 enhance the connection rigidity with the pad plate 7 and the car bottom channel steel beam, preventing lateral displacement during damping. The space interval provides sufficient deformation margin for the rubber damping pad 2, preventing the rubber damping pad 4 from failing due to excessive compression and ensuring the long-term stable operation of the damping mechanism.

[0018] This invention, through a rational structural design, achieves effective attenuation of the complex vibrations of high-speed elevators across the entire frequency band, while also possessing load adaptability and structural stability. It overcomes the core deficiencies of existing technologies and has significant practical value and promotional significance. In summary, the objective of this invention is achieved.

Claims

1. A high-speed elevator car vibration damping mechanism, comprising a rubber vibration damping device disposed at the bottom of the car, characterized in that: The rubber shock absorption device consists of two rows of rubber shock absorption pads arranged on both sides of the bottom of the car. The upper and lower ends of the rubber shock absorption pads are respectively vulcanized and bonded with an upper connecting steel plate and a lower connecting steel plate. The upper connecting steel plate is fixedly connected to the channel steel beam at the bottom of the car with bolts. The lower connecting steel plate is connected to the upper elastic steel plate of the U-shaped spring steel through a pad with bolts. The lower elastic steel plate of the U-shaped spring steel is connected to the weighing sensor with bolts. The weighing sensor is installed on the car bracket.

2. The high-speed elevator car vibration damping mechanism according to claim 1, characterized in that: The upper and lower connecting steel plates of the rubber damping pad are provided with bolt fixing eaves extending from the edge of the rubber damping pad. The rubber damping pad is set in the groove of the channel steel beam. The upper flange of the channel steel beam is suspended and fixed by bolts passing through the fixing holes of the bolt fixing eaves of the upper connecting steel plate. The U-shaped opening of the U-shaped spring steel is placed opposite to the groove of the channel steel beam. The upper elastic steel plate of the U-shaped spring steel is arranged in the groove of the channel steel beam and spaced apart from the lower flange of the channel steel beam.

3. The high-speed elevator car vibration damping mechanism according to claim 1 or 2, characterized in that: The two rows of rubber shock-absorbing pads are each symmetrically arranged with at least three sets of rubber shock-absorbing pads and U-shaped spring steel.

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