Intelligent CST Drive System

The Drive for Productivity With constant pressure for greater productivity, improving the performance of longwall systems remains a key goal for mine operators. At Caterpillar, all aspects of longwall operation and machinery are continuously reviewed to find ways to improve productivity and reduce the overall cost of mining. The performance of the face conveyor system is continually improving. Improved Performance Ever more powerful systems require ever more horsepower, heavier chains and faster conveyor speed with maximum availability. What was needed was a truly intelligent drive system for...

The CST is a closed system. A water hose for the heat exchanger and the 37-wire cable for the drive control unit and communication are the only external connections. A fast, real-time operating drive control unit controls all operations in the CST drive system via the integral servovalve. Each gearbox is equipped with a control unit interconnected via control cables. These units can communicate with minespecific face control systems underground or on the surface. The tried and tested Cat® hydraulic chain tensioner is used for safe operation during chain maintenance work. CST45 Drive System Startup...

Overload Protection If the chain is jammed by large pieces of rock or trapped iron, the CST clutch is opened rapidly and the motor is switched off. To achieve this, the output speed is constantly monitored. Within milliseconds, the rotating mass of the gearbox – and particularly of the asynchronous motor – is disconnected from the conveyor chain sprocket. Communication between the drive control units allows all clutches to be opened simultaneously. Benefits •• Instant,•effective•overload•protection:• Excessive chain forces and the risk of instant chain failures are virtually eliminated. Chains,...

V-Drive Visualization Software This software visualizes all CST, tail drive and chain tensioning data. It allows changes to drive system parameters and monitors load-sharing, conveyor speed, clutch sensors etc. The software also stores all CST data and undertakes analysis and trending of sensor values. It allows export of data to office applications such as electronic spreadsheets. Chinese, German and Russian versions of the software are also available. Field Experience Visualization of CST data by V-Drive The CST drive system was applied for the first time in 1995 on a high production longwall...

ICDS – Integrated CST Drive System The ICDS is the result of continuing cooperation between Caterpillar and Baldor Electric Company. It combines the tried-and-tested CST drive system for face conveyors with a newly developed special Baldor Electric motor with our new PMC™-D drive control system. The ICDS has a special asynchronous motor from Baldor Electric Company, with rated power of currently up to 1 200 kW (1,950 hp). The nominal motor running torque is 7 640 Nm (5,635 lb-ft) at full nominal speed. The maximum AFC starting torque (breakdown torque) is 3 x 19 100 Nm (14,090 lb-ft). Space is...

Technical Data CST30 CST45 CST65 Chain type longwall machinery like face conveyors Application Maximum output torque for a short duration (3 sec.) Maximum installed power* at: - i = 50:1 - i = 39:1 - i = 33:1 - 16:1 450 000 Nm 650 000 Nm 1500 rpm @50 Hz (1800 rpm @60 Hz) Maximum input speed (motor speed) 300 000 Nm 1500 rpm @50 Hz (1800 rpm @60 Hz) 1500 rpm @50 Hz (1800 rpm @60 Hz) 400 kW (650 hp) 435 kW (700 hp) 500 kW (800 hp) 500 kW (800 hp) 700 kW (1,100 hp) 800 kW (1,300 hp) 800 kW (1,300 hp) 1 000 kW (1,600 hp) 1 200 kW (1,950 hp) Oil filling quantities: - in-line drive system - right/left-angle...

Intelligent CST Drive System For more complete information on Cat products, dealer services, and industry solutions, visit us on the web at mining.cat.com and www.cat.com © 2011 Caterpillar Inc. All rights reserved Materials and specifications are subject to change without notice. Featured machines in photos may include additional equipment. See your Cat dealer for available options. CAT, CATERPILLAR, their respective logos, “Caterpillar Yellow” and the “Power Edge” trade dress, as well as corporate and product identity used herein, are trademarks of Caterpillar and may not be used without permission....