Magneto-rheological elevator buffer and control method

A buffer and magneto-rheological technology, applied in the direction of shock absorbers, shock absorbers, spring/shock absorbers, etc., can solve poor adaptability, inability to actively adjust the damping force of the buffer, spring buffer and hydraulic buffer damping The force cannot be adjusted in real time to achieve the effect of improving performance, improving comfort and stability, and good adaptability

Pending Publication Date: 2019-04-05
GUANGZHOU GUANGRI ELEVATOR IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] In the prior art, commonly used elevator buffers include spring buffers and hydraulic buffers, both of which are passively controlled, and cannot actively adjust the damping force of the buffer according to changes in physical parameters during the car drop process
It is also because the damping force of the spring buffer and the hydraulic buffer cannot be adjusted in real time, so that the car corresponding to different speeds must use different specifications of the buffer, which has poor adaptability

Method used

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  • Magneto-rheological elevator buffer and control method
  • Magneto-rheological elevator buffer and control method
  • Magneto-rheological elevator buffer and control method

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Embodiment 1

[0035] like figure 1As shown, this embodiment discloses a magneto-rheological elevator buffer, including a cylinder 4, an upper end cover 2 located at the top of the cylinder 4 and a lower end cover 6 located at the bottom of the cylinder 4, and a cavity inside the cylinder 4. The piston rod 1, the piston assembly 3, the compression spring 5, the switch assembly 8 located inside the upper end cover 2, the power supply unit 10, the controller 11 and the sensor 12. The upper part of the cylinder body 4 and the upper end cover 2 form an upper cavity, and the piston assembly 3 is arranged inside, and the magnetorheological fluid is filled in the cavity of the upper cavity; the lower part of the cylinder body 4 and the lower end cover 6 form a lower cavity, and a compression spring 5 is arranged inside . The piston rod 1 is divided into four stages of stepped shafts from top to bottom. The first stage of the stepped shaft is coaxially sealed and slidably connected with the upper e...

Embodiment 2

[0048] like image 3 As shown, this embodiment discloses a method for controlling a magneto-rheological elevator buffer, including the following steps:

[0049] S1, establish the ideal speed-time curve of the working process of the buffer, and store the ideal speed-time curve into the storage module of the controller 11;

[0050] S2. When the proximity switch 9 detects that the elevator car is about to hit the buffer, it is triggered, and the signal is sent to the controller 11, and the controller 11 sends a control command to the sensor 12. At this time, the sensor 12 samples the car quality M and the car speed V 10 and fed back to the controller 11 to calculate the initial excitation current I 0 And the excitation coil 32 is input by the power supply device 10;

[0051] S3. During the buffering process of the car, the sensor 12 samples the car speed V every interval ΔT 1i , calculate the corresponding car speed V 1i The excitation current I 1i , and the difference ΔV be...

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Abstract

The invention discloses a magneto-rheological elevator buffer and a control method. The magneto-rheological elevator buffer comprises a cylinder body, an upper end cover, a piston rod, a piston assembly, a compression spring, a lower end cover, a switch assembly, a power source device, a controller and a sensor, wherein the piston rod is a four-section stepped shaft; a first section shaft is in coaxial sliding connection with the upper end cover in a sealing manner; the second section shaft is in threaded connection of the piston assembly; the third section shaft is in coaxial sliding connection with a center through hole between a magnetic rheological fluid upper cavity and a compression spring lower cavity of the cylinder body in the sealing manner; the fourth section shaft is in threaded connection with a spring pressing sleeve; and an approach switch arranged in the top of the piston rod and a field coil mounted in the piston assembly are separately connected to the controller andthe power source device through a lead of a lead hole of the piston rod. The magneto-rheological elevator buffer disclosed by the invention adopts a semi-active control strategy; magnetic field intensity is changed through changing the magnitude of electric current of a field coil, so that the viscosity and shear yielding stress of Magnetic rheological fluid are changed, and additional damping force is generated; and the magneto-rheological elevator buffer disclosed by the invention has favorable adaptability, and the comfortability and the stability can be improved.

Description

technical field [0001] The invention relates to the technical field of elevator-related equipment, in particular to a magnetorheological elevator buffer and a control method. Background technique [0002] In the prior art, commonly used elevator buffers include spring buffers and hydraulic buffers, both of which are passively controlled, and cannot actively adjust the damping force of the buffers according to changes in physical parameters during the car's falling process. Also because the damping force of the spring buffer and the hydraulic buffer cannot be adjusted in real time, the cars corresponding to different speeds must adopt buffers of different specifications, which has poor adaptability. Contents of the invention [0003] The purpose of the present invention is to solve the above-mentioned defects in the prior art, and provide a magneto-rheological elevator buffer and a control method, which can adjust the damping force in real time according to the change of th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B66B5/28B66B5/06F16F9/53
CPCB66B5/282B66B5/06F16F9/535F16F2222/06
Inventor 赖绪华庞真宽江俊杰陈健豪
Owner GUANGZHOU GUANGRI ELEVATOR IND
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