1. The main parameters
(1) Rated operating speed: the running speed of the steps under no-load conditions V=0.5m/s,
(2) Inclination angle (α): The maximum angle formed by the cascade with the horizontal plane is 35°.
(3) Lifting height (H): 1500mm.
(4) Step width (B): 1000mm.
(5) Number of levels: 2 levels.
(6) Maximum conveying capacity: 1000 people/h.
(7) Motor power: 7.5KW
(8) Operating conditions: continuous system
(9) Truss deflection: ≤1/1000
(10) Traction machine: worm gear
(11) Approximate weight: 5500KG
(12) Approximate dimensions: 7047×1600×3500mm
2. Main components: The escalator consists of a truss, a drive reducer, a drive device, a tension device, a guide rail system, steps, and a step chain. It is composed of handrails and various safety devices.
(1) Truss: It is the basic structure of the escalator. All parts of the escalator are assembled in this metal structure.
Structure in the truss. It is made by welding angle steel, section steel, etc.
The truss consists of 3 parts, namely the upper platform, the middle truss, and the lower platform. To ensure that the escalator is in good working condition, the truss has high rigidity, and its allowable deflection is generally 1‰ of the distance between the upper and lower supporting points of the escalator. At the same time, the escalator truss is provided with intermediate support, which plays a supporting role, and can be adjusted automatically with the expansion and contraction of the truss.
(2) Driving machine (take chain type as an example): The driving machine is mainly composed of an electric motor, worm gear reducer, sprocket, brake (brake), etc. The installation position of the motor adopts a vertical driving machine. Its advantages are compact structure, small footprint, lightweight, easy maintenance; low noise, and low vibration.
(3) Drive device: The drive device is mainly composed of a drive sprocket, step sprocket, handrail drive sprocket, main shaft, brake wheel, or ratchet. The device obtains power from the driving machine, and is used to drive the steps and handrails through the drive chain, so as to realize the main movement of the escalator, and can brake in an emergency to prevent passengers from slipping and ensure the safety of passengers. The device is assembled in the upper platform (upper truss).
(4) Tensioning device: The tensioning device is composed of a ladder sprocket, shaft, tensioning trolley, and spring for tensioning step chain. The tension of the tension spring can be adjusted by the nut so that the step chain is in a good working condition when the escalator is running. When the step chain breaks or stretches, the rollers on the tension trolley are accurately guided to produce displacement, so that the safety device (step chain break protection device) is activated, and the escalator stops immediately.
(5) Guide rail: Both the step running and return guide rails are cold-formed profiles, which have the characteristics of lightweight, high relative rigidity, and high manufacturing precision, which are easy to assemble and adjust.
(6) Step chain: The step chain is supported by the support wheels with permanent lubrication, and the step wheels on the step chain can run smoothly on the sprocket of the guide rail system, driving device, and tensioning device; it also makes the load distribution even and prevents The premature wear of the guide rail system, especially when the two-step chains are connected by a stepped shaft in the reverse zone, ensures the stability of the overall operation of the step chain.
(7) Steps: The integral die-casting steps are made of aluminum alloy die-casting, and the pedals and starting boards are cast with ribs, which play the role of anti-slip and guide adjacent steps. This step is characterized by lightweight and high appearance quality.
(8) Handrail driving device: Directly driven by the driving device through the handrail drive chain, no intermediate shaft is needed. The driving wheel rim of the handrail belt has an oil-resistant rubber friction layer, and its high friction guarantees the synchronous operation of the handrail belt and the steps.
In order to obtain sufficient friction for the handrail belt, a pulley set is additionally provided under the handrail belt driving wheel. The tension of the belt is adjusted by a spring and screw in the pulley to ensure the normal operation of the handrail.
(9) Handrail belt: The handrail belt is composed of a variety of materials, mainly natural (or synthetic) rubber, cotton fabric (cord fabric), and steel wire or steel belt. The standard color of the handrail is black.
(10) Comb teeth, comb plates, floor plates:
①Comb teeth: comb teeth and comb plates are installed at the entrance and exit of the escalator to ensure the safe transition of passengers. The tooth grooves on the comb teeth mesh with the tooth grooves on the steps, even if the passenger's shoes or articles are relatively stationary on the steps, they will smoothly transition to the floor.
②Comb plate: The comb plate is used to fix the comb teeth.
③Floor board (landing board): The floorboard is not only the exit of the escalator but also the cover board of the upper platform and the lower platform maintenance room (machine room). It is made of plexiglass transparent and intuitive.
(11) Handrails: The handrails are arranged on both sides of the steps to protect and decorate.
(12) Lubrication system: All cascade chains and cascade rollers are permanently lubricated. The main drive chain, the handrail drive chain, and the step chain are lubricated separately by the automatic control lubrication system. The lubrication system sprays lubricating oil directly onto the chain pins with automatic timing and fixed points so that they can be well lubricated. The start-up time of the pump or solenoid valve and the oil supply time in the lubrication system is controlled by the delay relay in the control cabinet.
3. Control part of escalator training device: 1. An escalator is an important tool of public transportation, and safety is of paramount importance. This escalator can realize fault alarm action. According to the escalator safety standard (EN), escalators have the following safety devices:
①Broken chain (cascade chain) emergency stop switch.
②Broken belt (handrail belt) emergency stop switch.
③Over current protection, phase monitoring.
④ Driveshaft safety brake.
⑤ Emergency switch.
⑥Electric anti-reverse device.
2. Other parts: circuit protection in the control cabinet: air switch, fuse, phase relay, thermal protector, the power supply is three-phase five-wire.
