| Crawler crane is a kind of mobile crane that uses crawler and its support part for travelling. Powerlift8000 (360T) is a middle-large size crawler crane. It’s well revieved by the market because of large ground support area, smaller ground pressure, smaller turning angle, better travelling ability on bad ground condition, better climbing ability, better lifting capacity, the ability of travelling with load, more boom combination, bigger lifting height and working radius. The control system includes many PLCs to control all-hydraulic executive components synergistically. Communication meets canbus protocol. This system uses electrical hydraulic proportion technology, closed-loop control system for slewing, load sensing technology, power limit control system and GPS/GPRS system. These technologies makes the design meets product requirements. This article is writing from design and development point of view, mainly includes below contents:1. The history of crane development, current developing situation in domestic and overseas, the function and feature of crawler crane. Before development, via investigation of similar products exit in marketing, confirmed specifications of Powerlift8000.2. Introduce crawler crane’s power and drive system. Describe main components like lifting, travelling, slewing and other key mechanism system and how they are working.3. Discribed how to meet the specification through detailed calculation and chosen of main drive system and components.4. Using electrical hydraulic proportion and load sensing technology to design hydraulic system.5. The design of electric system, programming for PLC. Finally, after testing of the prototype’s engine system, hydraulic system and strength, list out testing record data which can prove the crane is successfully developed. |
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