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Ŀ¼ Ò³Âë Table of contents Page

1 Ò·ÒýʽµçÌÝ 1-40 Traction lifts

1-1 µçÌݵĻù±¾½á¹¹ 1-6

Basic structure

1-2 µçÌݵķÖÀà 6-15 Lift Types

1-3 µçÌݵÄÒ·Òý´«¶¯ 15-31 Traction drive

1-4 µçÌݵÄÖ÷Òª²ÎÊý¼°¹æ¸ñ³ß´ç 31-35 Main parameters and dimensions

1-5 µçÌÝÖ÷Òª²¿¼þµÄ°²×°Î»Öà 35-40

Main components and position¡£

1 Ò·ÒýʽµçÌÝ Traction lift

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Being a special system moving upwards and downwards by combining mechanics and electrics, lift has played an indispensable role in our modern life by serving as widely- used vehicle that runs vertically; it is not only an important vertical vehicle for high-rise buildings, but for low-rising buildings. As a vertical vehicle, traction lift is the most commonly used lift; therefore, the following description will be based on traction lift.

1-1 µçÌݵĻù±¾½á¹¹ Lift basic structure

1-1-1 Ò·Òýϵͳ Traction system

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Traction system is composed of traction machine, traction rope, diverter pulley and counterweight sheave.

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As the power provider, traction machine is composed of drive motor, brake, geared machine, machine base and traction sheave. Drive motor is AC or DC motor for lift.

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Usually adopted is double lined normally closed magnetic brake. Brake is activated to prevent lift from moving in case of lift stop or power failure.

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Usually adopted is worm geared machine, besides, star gear and slanting geared machine are also available. Gearless lift needs no geared machine. Traction sheave is a sheave on traction machine, on both sides of which can suspend car and counterweight by means of traction rope.

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Both sides of the traction rope are connected with car and counterweight (or both sides are attached to the machine room). Car is moved upwards or downwards by means of static friction between traction rope and rope groove.

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Deflector sheave is also called beam Pulley. Since car is comparatively large in dimensions; the distance between car suspension center and counterweight suspension center is generally longer than the diameter of traction sheave, deflector sheave is usually used for lifts to ensure the distance between two ropes downwards to be equal or almost equal to the distance between car suspension center and counterweight suspension center, distancing car and counterweight.

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For gearless lift with compound wounding, changing the position of winding pulley can also achieve the above purpose, besides the application of compound winding pulley can also increase traction capacity.

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Diversion sheave: with suspension ratio > 1, diversion sheave should be installed on the top of car and counterweight frame. Related to suspension ratio, number of diversion sheave can be 1, 2 or even 3.

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1-1-2 µ¼Ïòϵͳ Diverter system

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Composed of guide rails, guide shoes and rail frame, diverter system is used to limit the flexibility of car and counterweight, making car and counterweight move along the guide rail upwards and downwards.

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Guide rails are fixed on the rail frame that is used to support rails and connected with well wall.

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1-1-3 ÃÅϵͳ Door system

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Door system is composed of car door, level door, door operator, interconnection and dook lock.

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ocated in the entrance to car, car door is composed of door fan, door guide rail frame, door shoe and door vane.

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Located in the entrance to landing, landing door is composed of door fan, door guide rail frame, door shoe, door lock and emergency unlocking device.

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Installed on the car, door operator is power provider for opening and closing car door and landing door.

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