Torsional
42Pages

■■ Pump Mounting Plates ■■ Pump Mounting Housings ■■ L-LOC Clamping Feature

Safety Warning When using Lovejoy products, you must follow these instructions and take the following precautions. Failure to do so may cause the power transmission product to break and parts to be thrown with sufficient force to cause severe injury or death. Refer to this Lovejoy Catalog for proper selection, sizing, horsepower, torque range, and speed range of power transmission products, including elastomeric elements for couplings. Follow the installation instructions included with the product, and in the individual product catalogs for proper installation of power transmission...

Lovejoy torsional coupling are designed to dampen torsional vibrations and tune, or adjust the system’s critical speeds away from the application’s operating range. With the proper information (see Torsional Worksheet on page T-10) Lovejoy engineers can perform a Torsional Vibration Analysis, or TVA for your application to assist in the selection of a torsional coupling. See sample TVA in the graph to the right. Lovejoy offers a wide range of torsional couplings engineered to solve torsional vibration problems found in diesel engine driven equipment and other applications where torsional...

Configuration: LV Series couplings are designed for mounting on standard SAE J620 flywheels with The the element bonded to the mounting plate. The face plate is specially designed to interface with flange mounted universal joints popular in the agricultural deep well pump markets. Application: diesel engine driven equipment, flange interfaces, and universal joint driveshaft driven Any equipment. Nominal torque range (TKN): up to 10,820 in-lb (1223 Nm) Max angular, parallel, and axial misalignment: based on SAE design parameters Element material: High Temperature Rubber (HTR) or EPDM The LV...

Engine Application Selection Process JW When correctly sized, the Lovejoy Torsional Coupling will effectively dampen vibration and tune critical frequencies out of the operating range of systems driven by diesel, gasoline, or natural gas reciprocating engines. Some coupling selections can be verified using a Torsional Vibration Analysis performed by Lovejoy Engineering (see worksheet page T-10). Use the following steps in conjunction with the technical data and dimensional tables contained in the following sections to make the preliminary coupling selection for internal combustion engine...

Engine Application Selection Process JW JIS Critical speeds are related to the system natural frequency and the number of pulses or excitations generated per revolution i (order). For analysis, if possible, reduce the application to a 2-mass system and apply the following equations: Where: TKW = Coupling rating for continuously oscillating torque at 10Hz V = Amplifing factor outside the resonance. Substitute Vr for V with run-through of resonance application (see Figure 3 on page T-9) Where: nR = critical resonance speed of the system (RPM) CTdyn = dynamic torsional stiffness of the...

Industrial Application Selection Process JW While the Torsional coupler was developed to solve the unique problems associated with the torsional vibration in equipment driven by internal combustion engines, the coupling works equally well in general industrial applications. For these electric motor-powered and other non-engine applications, use the following simple selection procedure (Refer to page T-6 for engine-driven applications). Step 3: Determine Service Factor Step 1: Coupling Selection Select the torsional coupling model that best suits your drive arrangement. Step 4: Calculate...

Application Service Factors Selection Data JW JIS CJ SF Coupling Element Figure 3: Resonance Factor Vr Note: n HTR is High Temperature Rubber. Permissible Misalignment vs. Speed Figure 4: Permissible Misalignment vs. Speed HTR (Angular & Parallel) Zytel (Angular) Operating Speed Percent of Rating for Allowable Misalignment at TKN Chemical Resistance Chart Solvents & Fuels Acids & Bases Ethylene Glycol* Hydraulic Fluid Halocarbons, Freon Liquid Ammonia Phosophate Ester Carbon Tetrachloride A void contact with hydrocarbon base lubricants or use of any anaerobic adhesives. A indicates: Little...

For assistance in selecting a Torsional coupling for your internal combustion engine application, please complete the entire worksheet and fax it to 800-446-0878 or send via email to appleng@lovejoy-inc.com. Direct questions to 630-852-0500. Coupling Selection Worksheet for Internal Combustion Engines (diesel, gas, natural gas) JW Coupling Selection Worksheet Customer Information Company Name:________________________________________________________ Contact Name:_____________________________________________ Phone Number:_________________________________________________________ email...

L-LOC Clamping Feature and Spline Identification Overview JW JIS CJ SF ■■Reduces potentially damaging stress on equipment components ■■L-LOC eliminates premature spline shaft maintenance or replacement ■■Improves the effectiveness of the connection between the hub and shaft ■■Quick and easy to assemble and/or removal ■■Helps reduce equipment noise often related to couplings The L-LOC feature is a remarkably simple, yet effective design, consisting of a unique ’dog bone’ shaped slot that is placed slightly above and parallel to the spline bore. When these set screws are tightened, the hub...

The LF Series coupling is designed with a unique and highly versatile elastomeric element. These can be easily integrated into a variety of coupling configurations to meet several application needs. LF Style elements are available in a variety of materials to match the necessary coupling dampening characteristics for tuning the systems critical speed away from the application operating speed. The element can be connected axially to a flywheel adapter plate or flanged hub and radially to a cylindrical center hub using the appropriate bolts. Axial bolt styles include either socket head bolts...