The invention relates to a permanent magnet safety retarding device for an elevator traction sheave. The permanent magnet safety retarding device comprises a first magnetic piece fixed to the inner circumferential side wall of the traction sheave. Damping force can be generated between the second magnetic part and the first magnetic part to slow down the traction wheel, the second magnetic part and the first magnetic part are coaxially arranged, and the second magnetic part can move to the hollow inner cavity of the first magnetic part or be far away from the first magnetic part in the axial direction of the second magnetic part; and the driving assembly is used for driving the second magnetic piece to move in the axial direction of the second magnetic piece and is arranged on the second magnetic piece. The elevator has the beneficial effects that under the action of a permanent magnetic field formed between the first magnetic part and the second magnetic part, the traction wheel rotates around the shaft to form damping force for preventing relative movement of the traction wheel and the second magnetic part, so that the traction wheel drives the car to run at a speed, and passengers are prevented from being injured due to overlarge speed reduction of the car during emergency braking. When braking of the traction wheel and braking of the safety clamp are both invalid, the traction wheel is decelerated through the interaction between the first magnetic part and the second magnetic part, and then the lift car can run in a decelerated mode all the time.
本发明涉及一种电梯曳引轮永磁安全缓速装置,包括固定在曳引轮内周向侧壁上的第一磁性件;能和第一磁性件之间产生阻尼力以对曳引轮缓速的第二磁性件,第二磁性件和第一磁性件同轴设置,且能沿其轴向运动至第一磁性件的中空内腔或者远离第一磁性件;以及用于驱动第二磁性件沿其轴向运动的驱动组件,驱动组件设在第二磁性件上。其有益效果是,在第一磁性件和第二磁性件间形成的永磁磁场的作用下,曳引轮绕轴转动时形成阻碍二者相对运动的阻尼力,使曳引轮带动轿厢减速运行,避免紧急制动时导致轿厢减速度过大引起乘客受伤。当曳引轮制动和安全钳制动均失效时,第一磁性件和第二磁性件间的相互作用对曳引轮进行减速进而使轿厢始终能够减速运行。
Elevator traction sheave permanent magnet safety retarding device
一种电梯曳引轮永磁安全缓速装置
2022-03-25
Patent
Electronic Resource
Chinese
IPC: | B66B Aufzüge , ELEVATORS |