Explain the structure and driving mode of the elevator in detail

The structure of the elevator

1. Traction system: its function is to output and transmit power to make the elevator run. It is composed of a traction machine, a traction wire rope, a guide wheel and an anti-rope wheel.

2. Guiding system: its function is to limit the freedom of movement of the car and counterweight, so that the car and counterweight can only move up and down along the guide rail. It is composed of guide rail, guide shoe and guide rail frame.

3. Door system: its function is to seal the entrance of the landing and the entrance of the car. It is composed of car door, landing door, door opener, linkage mechanism and door lock.

4. Car: Its function is to transport passengers or goods. It is composed of car frame and car body.

5. Electric drive system: its function is to provide power and control the running speed of the elevator. It is composed of traction motor, power supply system, speed feedback device, motor speed control device, etc.

6. Electrical control system: its function is to manipulate and control the operation and execution of the elevator, and it is composed of operating devices, position display devices, control panels, leveling devices and layer selectors.

7. Safety protection system: Its system can protect the safe use of elevators. Mainly speed limiter, safety gear, buffer and limit protection, etc.

8. Weight balance system: The system can balance the weight of the car and part of the rated load to ensure the normal use of the traction drive of the elevator. It is composed of counterweight and weight compensation device.

Driving method of elevator

Method 1: AC elevator uses AC induction motor as driving force.

Method 2: DC elevator uses DC motor as driving force. The rated speed of this type of elevator is generally above 2.00m/s.

Method 3: The guide rail is processed into a rack, the car is equipped with a gear that meshes with the rack, and the motor drives the gear to rotate to make the car rise and fall. This type of elevator is called a rack and pinion elevator.

Method 4: Generally, an electric pump is used to drive the liquid to flow, and the elevator that lifts the car by the plunger is called a hydraulic elevator.

Method 5: Process the plunger of the straight-top elevator into rectangular threads, then install the big nut with thrust bearing on the top of the cylinder, and then drive the nut to rotate through the reducer through the motor, so that the screw lifts the car up or down The elevator is called screw elevator.

Mode 6: In addition to the above driving modes, there is another type of elevator whose power source is a linear motor.