
Introduction
The KSL series variable fill fluid couplings by Transfluid are designed to address challenges in 'start up' and 'speed variation' for medium to high-powered machines driven by electric motors or internal combustion engines.
Working Operation
The KSL couplings operate efficiently by using oil as a power medium, which is pumped into the hydrodynamic coupling circuit and drained back into the sump. The variable fill principle allows for controlled oil flow, altering slip characteristics for a softer start-up. Key features include torque limiting, disconnect capability, and speed variation within a 5:1 range for centrifugal machines.
Characteristics
The KSL couplings offer a soft starter function, accurate speed variation, vibration dampening, overload protection, high efficiency, and ease of maintenance. The split casing design allows for easy removal of the impeller assembly without realignment. Optional features include an auxiliary lubrication unit and ATEX EEx compliance upon request.
Applications
The KSL couplings are suitable for mills, crushers, conveyors, fans, blowers, pumps, compressors, centrifuges, mixers, generators, and marine propulsion drives.
Selection Criteria
To select the appropriate KSL coupling, Transfluid requires information on motor/engine type, power, speed, driven machinery type, output speed range, environmental conditions, cooling characteristics, and shaft dimensions.
Working Scheme
The system can be controlled automatically or manually, with parameters such as speed, oil pressure, and temperature under control. The setup includes various components like variable flow feed pumps, lubrication oil pumps, heat exchangers, and sensors.
Performance
The KSL couplings maintain high efficiency with minimal slip. Performance metrics include input and output power, with losses varying based on machine characteristics.
Dimensions and Weight
Dimensions and weights are provided for different KSL models, with specifications subject to change.
Application Examples
Examples include ceramic mills in Italy and fan drives in Brazil, showcasing the versatility of KSL couplings in various industrial applications.
VARIABLE FILL FLUID COUPLINGS
Open the catalog to page 1Overload Protection This is a fluid coupling advantage and a big benefit to users. Transfluid designed the KSL series variable fill fluid coupling to overcome difficulties experienced during ‘start up’ and ‘speed variation’ operation for medium or high powered machines, driven by electric motors or internal combustion engines. High Efficency The KSL is an extremely efficient device compared to the constant filled type fluid coupling, because the working circuit volume is controlled at the fullest possible level to maintain a very small slip rate. The Transfluid JET RECOVERY POWER system, provides...
Open the catalog to page 2WORKING SCHEME All parameters under control such as: speed, start up modulation, oil pressure, oil temperature, filter clogging, oil level, heat exchanger pump thermostatic control. SEMIAUTOMATIC / MANUAL CONTROL PANEL Display speed, pressure, temperature LOCAL REMOTE speed settings (4-20 mA) from DCS output speed input signals from sensors and switches LOCAL SPEED SETTING heat exchanger pump thermostatic control Variable flow feed oil pump KSL main drive motor 1 - variable flow feed pump with variable frequency converter 2 - lubrication oil pump 3 - heat exchanger oil pump 4 - pressure gauge...
Open the catalog to page 3MOTOR POWER - kW Size / kw max * With steel impellers NOTE: Standard squirrel cage motors should NOT be derated Efficency of electric motor is NOT affected by KSL application Value of electric motor efficency can be found in manufacturer’s catalogue Slip can vary ±10% according to driven machine characteristics Input power Output power Power (% of the max input power) CENTRIFUGAL APPLICATION Power loss Variable fill fluid couplings - 2407 OUTPUT SPEED %
Open the catalog to page 4BOILER FEED WATER PUMPS, PIPE LINE PUMPS, CENTRIFUGAL GAS COMPRESSORS, CITY FEED WATER PUMPS, RECYCLING PUMPS, ALL FANS AND BLOWERS fan and blower centrifugal pump compressor main drive motor HAMMER MILLS, BALL MILLS, STONE CRUSHERS, METAL SHREDDERS, WOOD CHIPPERS reduction gear main drive motor main drive motor lobe compressor BELT CONVEYORS main drive motor reduction gear Variable fill fluid couplings - 2407
Open the catalog to page 5WEIGHT ACCORDING TO STANDARD VERSIONS DIMENSIONS ARE SUBJECT TO ALTERATION WITHOUT NOTICE 1 2 3 4 Variable fill fluid couplings - 2407 Variable flow pump Lubrication oil pump Feed filter with vacuum switch Lube filter with differential pressure transducer Feed pressure gauge Lube pressure gauge Temperature gauge Filter by-pass valve Proximity switch Temperature switch Drain tap Electric wiring box Breather Level switch and gauge Manual control valve Cooler Lifting ears Cooler pump Alignement couplings
Open the catalog to page 6APPLICATION EXAMPLES 2x34 KSL, 630 kW - 1000 rpm, Ceramic mill (Italy) Variable fill fluid couplings - 2407
Open the catalog to page 7Tables for the preliminary selection of the coolers: - KSL with oil cooler motor pump (2 poles motor) - Refer to available speed drive or start up drive column - Max power = max power at max speed - Output water temperature 35°C - For power higher than those listed below, please apply Transfluid VARIABLE SPEED APPLICATION START-UP APPLICATION Fluid Coupling max. power (kW) Water-Oil Cooler Model Required Water Flow (l/min) at 25°C Cooler Oil Pump Model Fluid Coupling max. power (kW) Water-Oil Cooler Model Required Water Flow (l/min) at 25°C Cooler Oil Pump Model • Tube bundle heat exchanger ••...
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