GBM hoisting mechanism

Independently developed by Jiangxi Gongbu Machinery, GBM gearless hoisting mechanism is driving unit composed of permanent magnet synchronous motor with world's first super-low rotation speed and high-torque outer rotor, electronic control system and braking system.It is mainly used for replacing four consecutive driving units including traditional “motor + coupling- reduction box +winding drum and can be widely used in lifting trolley of crane in machinery, port, shipping, paper making, mine, logistics, nuclear power, building, wind power, offshore heavy industry and each other industries, and also can be used in crane’s amplitude variation, rotation and operation and other mechanisms.

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The working principle is as below: according to torque and rotation speed needed by lifting trolley of crane, electronic control system gives orders, then low rotation speed and high torque motor (winding drum is outer rotor ) directly drives winding drum and drives steel wire rope realize load movement .

Lifting motor: low speed and high torque motor is independently designed and manufactured by GBM; the lowest rotation speed is one turn/every ten minutes and speed regulation ratio is 1:300, this is higher than European crane 1:10 by 30 times;

Electronic control system: it is independently developed by GBM. Aiming at performance features of low speed and high torque motor, the company breaks through key technology of direct-drive crane under condition without reduction box, and develops world-leading control function of crane such as light load and speediness, operation at dead slow speed, distance inching and error correction and provides new functions and tools for meeting requirements of high speed handling of materials and precise assembly at ultra-low speed, which can greatly improve working efficiency of crane.

Performance comparison form between GBM crane and European and traditional cranes

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

Contents for comparisonGBM craneEuropean weight-reduction craneDomestic traditional standard crane
Working class It can adjust and protect for A3-A8. It can adjust for A3-A7, without protection. It cannot adjust and protect for A3-A8.
Transmission mode Simple Complex Complex
Wide range of speed regulation Speed range is from 0.1 to 90m/min, speed regulation ratio can achieve 1:300 1:10 (maximum: 1:15) Speed is not adjusted; 1:10 can be realized if frequency converter is added.
Light load and speediness According to real-time weight, light load and speediness can be realized at section of constant power and secondary hook is canceled. It cannot be realized. It cannot be realized.
dead slow speed operation Start dead slow speed operation function, control speed to be less than 0.2m/min. Accurate positioning can be realized, this can prevent too operation speed and avoid repeatedly positioning and avoid load knocking and scratch. It cannot be realized. A few imported cranes have similar optional function, but performance cannot reach level of Gongbu. It cannot be realized.
Distance inching Start Distance inching function, set inching distance to be 1 to 3mm each time. This can guarantee steady load operation and realize high-precision positioning. It is especially suitable for maintenance and precise assembly of large mechanical equipment. Distance inching cannot be realized. Inching causes impact. Distance inching cannot be realized. Inching causes impact.
Synchronous control Synchronous control of two sets or more of drive mechanisms can be realized. Optional function, synchronous device needs to be added. Optional function, synchronous device needs to be added.
Flexible startup and brake and zero-speed brake Protect and prevent load from impact, prolong service life of crane steel structure and brake and other parts. Zero speed brake cannot be realized. All cannot be realized.
Multiple security protected mode Safety brake and electromagnetic safety protection device. Even if safety brake fails, it also can protect load and avoid stalling and gliding. If safety brake fails, object will stall and fall. If safety brake fails, object will stall and fall.
Motor starting, without impulse current Starting current is not more than work current of rated load, this can prolong service life of electricity and save investment of bus. Starting current is 2 to 3 times of current of rated load. Frequent impact affects service life of electricity and operation of other equipments of same circuit and investment of bus will be big. Starting current is 2 to 3 times of current of rated load. Frequent impact affects service life of electricity and operation of other equipments of same circuit and investment of bus will be big.
Efficient system and obvious energy saving effect. Electricity is saved generally by more than 20%. Motor can run four-quadrant. Energy feedback can be realized, feedback efficiency is high, with good quality, meeting requirements of connecting network. Compared with traditional one, it can save some electricity, but realized feedback efficiency is low and quality is poor. Not save electricity
Start under load does not fall It does not fall. It falls a little. It falls.
Self-learn with empty hook Self-learn under load without needing to dismantle motor; self-learning parameter is accurate and is convenient to commission at the site. Crane motor must be separated from reduction box before self-learning under load. It is not convenient for site commissioning. Crane motor must be separated from reduction box before selfe-learning under load. It is not convenient for site commissioning.
“internet+” new function Many functions such as crane work visualization, data collection, remote diagnosis, remote control, multi-machine linkage, unattended production line and seamless joint of production line can be realized. Advanced European crane can realize. It can not be realized.
Reserving function upgrading interface Functions such as communication fault protection, automatic positioning, anti-sway and presetting action can be upgraded. Reserving function interface cannot be realized. Reserving function interface cannot be realized.