How to avoid elevator car door failure?

The failure of elevator door system accounts for a large proportion of the total failure of elevator, among which the door mechanism is the most frequently running system in the work of elevator, which is directly related to the safe and reliable operation of elevator. The failure rate of car door system also accounts for a considerable proportion in the failure rate of door system. The main reason is that the installation technology of door system is not up to the design requirement. The interpretation of the car door below is shared.

  1. The door opener, car door, safety security sensor, and the installation of the door knife have been completed by the installation team at the time of maintenance.
  2. The adjustment of car door is the premise of door system adjustment. Only after the door is adjusted, will the door be calibrated.
  3. First remove dust from the door with a pair of fan, and then grind the track of the door with more than 300# sandpaper to ensure the flexible operation of the door.
  4. The door must be adjusted to:
  • The distance between the door plate and the floor sill is 4mm;
  • The distance between the door and the front wall of the car is 4-6mm (not too small). Check method is to use just ruler on two pieces of door plank up and down side, whether it is balance.
  • The front and side of the door must be vertical to ensure that the door is properly sewn when it closed, meanwhile when opened; it joined to the front of the car. After adjusting the car door, you can open and close the door manually. The whole switch process should be easy and smooth.
  1. Adjust the security sensor and light curtain. When the contact plate is extended, the contact plate’s protrusion is suitable for 30mm to 50mm, and the same amount of two contacts is used. The light curtain should be even, and no abnormal trigger should occur during the rapid opening and closing process, especially for the rear light curtain to keep clean.
  2. Adjust the opening knife: step 1: make sure the distance between the door knife and the floor sill of the hall door is 7mm, and ensure the vertical direction; Step 2: determine the distance between the blade of the door knife and the decoupling roller of the door lock of the hall door is about 7mm. Check running elevator to observe all the way, depends on the clearance of most hall door, can be in a small range on the left, right, right amount translation car door assembly (this method is not applicable to double synchronous door knife of double folding door such as TD3200 car elevator door machine); Step 3: the two surfaces of the door knife blade, namely the one of the rollers, must be vertical. Step 4: check that when driving the door, the blade should not make abnormal sound.
  3. The speed of opening and closing shall be adjusted when the door of the sedan chair drives the door of the hall. The speed shall be controlled at about.070m/s. The speed of opening and closing doors should be gentle according to the elevator’s different acceleration and deceleration.
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