Lifting Trolley Of Crane Without Gearbox

Performance comparison form between GBM crane and European and traditional cranes<

(Taking QD200t/50t-33m H=28m A3 as an example)

[Lifting speed]： When one crane works, lifting speed of GBM trolley is variable value. The lighter the actual lifting tonnage is, the faster the lifting speed is. Light-load speed is lifting speed to which light load corresponds; heavy-load speed is corresponding lifting speed under heavy load. When actual lifting weight is rated load, the speed can be calculated according to reference hoisting power. Lifting speed adopts frequency control; speed regulating scope is 0.2m/min, corresponding to marked lifting speed.

[Running speed] horizontal moving speed of GBM hoisting trolley at span direction of crane, the value in selection table is common speed; it also can be separately designed according to requirements of users, adopting frequency control.

[Total height of trolley]: distance from track surface of trolley to the highest point of trolley.

[trolley base distance]: it is trolley wheelspan, it is recommended value in selection table and actual value can be adjusted according to need of working condition.

[trolley gauge]: Distance between running tracks of trolley. Trolley gauge in selection table is minimum gauge under corresponding type and can be increased according to hoisting requirements; when selecting, try to select gauge which can better match with actual parameter of whole machine.

[lifting height]: it is distance between hook center and ground when hook hoisting reaches highest point; standard lifting height in selection table is minimum height under corresponding type, which can be increased according to the facts.

[light-load fast speed]: When actual load is less than rated load, light-load fast speed (speed range: 110 to 250% of rated load) can be achieved, specific value shall be designed according to requirements of users.

[stalling protection]: when actual load is less than or equal to 50% of rated load, it can be achieved as standard-configuration function. When actual load is bigger than 50%, to achieve stalling protection, it needs to be used as optional function.

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1. Motor (including reel)

• IP55 protection level
• Grade F insulation

2. Electronic contro
    IP55 protection level

3. Brake

• Standard-configuration panel brakewith better and safer braking effect.
• Zero-speed brake, service life of brake is greatly prolonged.
• Built-in electromagnetic brake avoid power losing and stalling
• Dust proof, without asbestos friction sheet

4. Three-in-One walking--- and control system

• Three-in-one operation of frequency converting control is stable and efficient.

5. European style hook, pulley block

6. Overload limiter

• Hinge pin type; lateral pressure type, fixed pulley is optional.

7. Limiting stopper

• Shift fork type, induction type. Cam type limit is optional.

High-performance steel wire rope

• Glossy surface. With coating optional

9. Wheel

• Select according to needs of customer and wheel pressure and track

10. Trolley rack

• GBM trolley. European style trolley is optional

Compared with traditional trolley and European trolley, GBM lifting trolley achieves six following breakthroughs:

1.Trolley frame structure achieves breakthrough: adopting triple-beam customized structure, simple and lighter; wheel pressure is uniformly distributed.

2.Transmission mode achieves breakthrough. It abandons four consecutive transmission mode of traditional “motor + coupling- reduction box +winding drum and realizes direct driving. This is one subversive revolution of technological development in crane industry.

3.Motor design technology achieves breakthrough. Through adopting optimized magnetic circuits design, adopting new material and many other methods, the company is the first one in the world to solve problem of motor heating, and achieves super-low rotation speed and high torque.

4.Braking safety protection achieves breakthrough. Standard factory configuration type safety brake achieves zero speed brake and greatly prolongs service life of brake. With special electromagnetic safety protection device added, even if safety brake fails, it also can protect load and prevent it from falling.

5.Development of electric control function achieves breakthrough. It breaks through key control technology of direct-drive crane under condition without reduction box, and develops a series of world-leading crane control function such as light load and speediness, dead slow speed operation, reserved function upgrading interface for distance inching and others.

6.Clean and environment protection achieves breakthrough: ultra-silence, work noise is lower than 55dB; clean and environment protection can guarantee no use of oil at any part and no leakage, thereby ending the history of high noise and oil leakage and pollution of crane.