Detailed Explanation of Elevator Electric Traction System

The elevator safety protection system is an important device to ensure the safe operation of the elevator and prevent accidents. It consists of multiple components, including speed limiter, safety clamp, buffer, terminal protection device, overspeed protection, power supply fault protection, floor door and car door interlocking devices.

Main components and their functions:

●Speedlimiter: detects the elevator speed. When the speed exceeds the set value, the safety clamp is mechanically activated to force the elevator car to stop on the guide rail.

●Safety clamp: linked with the speed limiter. When the elevator overspeeds, the safety clamp clamps the guide rail and forces the elevator to stop.

●Buffer: installed at the bottom and top of the elevator shaft to absorb the energy when the elevator falls or hits the top and reduce the impact.

●Terminal protection device: includes limit switch, forced speed change switch, etc. to prevent the elevator from exceeding the predetermined working range.

●Overspeed protection: when the elevator speed exceeds the set limit, it starts immediately to ensure safety.

‌●Power supply phase failure protection‌: Ensure that the elevator can respond in time to ensure safety in the event of a power failure‌.

●Interlocking of floor door and car door‌: Ensure that the elevator can only start after the door is completely closed‌.

Working principle and importance:

The working principle of the elevator safety protection system is based on mechanical and electrical interlocking mechanisms. For example, the speed limiter remains silent when the elevator is operating normally. Once the speed exceeds the set value, the speed limiter triggers the safety clamp mechanically to force the elevator to stop. These devices work together to ensure that the elevator can brake quickly in an emergency to prevent accidents‌.

Maintenance and detection methods:

In order to ensure the effectiveness of the elevator safety protection system, regular maintenance and detection are required. This includes checking whether the speed limiter, safety clamp, and buffer function normally, testing the response speed of the terminal protection device, and verifying the reliability of the power supply phase failure protection, etc. ‌.

Through these measures, the elevator can be ensured to operate safely under various working conditions.