240 mm Sheave Diameter Elevator Safety Parts Overspeed Governor
Elevator Safety Parts: Overspeed Governor
The Overspeed Governor is a fundamental safety component in
elevator systems, designed to prevent catastrophic accidents caused
by excessive speed. This critical device consists of a flywheel
mechanism, centrifugal weights, and a tripping device that
activates when the elevator exceeds predetermined speed limits.
Operating on mechanical principles, the governor connects to the
elevator car through governor ropes. When descending speed
surpasses the rated limit (typically 115-125% of normal speed),
centrifugal force causes the weighted arms to swing outward,
engaging the braking mechanism. This action simultaneously triggers
the safety gears to clamp onto guide rails, bringing the elevator
to a controlled stop.
Modern overspeed governors incorporate both mechanical and
electrical components, with some advanced models featuring
electronic speed monitoring for enhanced precision. The device must
comply with international safety standards like EN 81-20/50 and
ASME A17.1, undergoing rigorous testing to ensure reliability.
Regular maintenance is crucial, including:
Monthly visual inspections
Annual speed verification tests
Lubrication of moving parts
Rope tension adjustments
This overspeed governor is one way
With mechanical remote reset and trigger function
Using with one way safety gear
| Rated speed(m/s) | 0.25~2.5 |
| Lifting height(m) | ≤110 |
| Over speed switch voltage grade(V) | DC110 or AC220 |
| Switch magnet voltage grade(V) | DC24 or AC220 |
| Action magnet voltage grade(N) | DC24 or AC220 |
| Sheave pitch(mm) | Wire rope diameter(mm) | Rope pulling force(N) | Voltage grade of solenoid(V) |
| 240 | 8 | 1000~2000 | DC24 |
| 6 |
| 8 | AC220 |
FAQ
1. Are the elevator wire ropes durable?
The elevator wire rope has special provisions and requirements.
Configuration is not only for wire rope and rated load, but also
considered the size of the traction, as a result, the tensile
strength of wire rope is greater than the weight of the lift. The
safety factor is equipped with more than four wire rope. So it
won’t break at the same time.
2. Is it dangerous for power failure suddenly during the elevator
running?
If it occurs, the elevator will automatically stop due to the
electrical and mechanical safety device. In case of power
failure,elevator brakes will automatically taken. In addition, the
power supply departments such as planned outage, prior notice are
also operating.
3. Will us be hurt when it closed suddenly?
In the closing process, if people touch the hall door, the door of
elevator will automatically restart without any danger. With anti
clamping switch, once the gate touched, this switching action make
the elevator unable to be closed and even reopened. In addition,
closing force is also available here.
4. How the elevator running?
Elevators are operated with a counterweight wire rope through the
(tractor) traction drive, making ups and downs on the guide rail.
5. Is the escalator installation complicated?
We believe the functions of an escalator are not necessarily
proportional to the operation complexity. Therefore, escalators
designed by us apply an integrated structure, so that the equipment
is more precise and more efficient and allows easier and more
convenient commissioning.
6. Do you have any cerifications?
Yes, we do with ISO9001 / CCC / CE Certificates for u.
