Disc Couplings
As Lovejoy enters its 100th year, it brings to market the best disc coupling yet to be offered. The Lovejoy/Jaure disc coupling utilizes the latest design efforts through Finite Element Analysis, extensive testing of materials and couplings, and several years of operational experience in actual applications. The improvements in this coupling come from modifying the disc profile by using the latest Finite Element Analysis. As a result of the development work, the Lovejoy/Jaure disc coupling 6 bolt type can operate at 1.5° misalignment. The coupling can do so up to 50% torque capability. The disc coupling imposes smaller forces on the bearings for a given misalignment and transmits more torque than other competitive couplings.
Features and Benefits Of Disc Couplings
• No need for lubrication and maintenance
• The coupling can be inspected without disassembly
• The machine misalignment can be assessed
• Torsionally rigid without any backlash
• No wearing parts, high resistance to harsh environmental conditions
• Infinite life if properly aligned
• If misalignment is kept within specified limits, these couplings can last as
long as the machines on which they are installed
• High power density (more torque for a given overall diameter)
• The disc coupling conforms to the API 610 8th edition.
Applications That Best Fit Disc Couplings
• Pumps
• Blowers and Fans
• Compressors
• Conveyors, Hoists, and Elevators
• Packaging Machines
• Roller Tables
• Calenders
Styles Available
- Type SX This is the standard disc coupling that includes two rigid hubs, a minimum length spacer and two disc packs. The disc packs are bolted to the hubs and spacers at the time of coupling installation. The disc packs are unitized. Variations in the spacer length are available. Stock spacers meet industry standard lengths for various equipment. The coupling has two flex planes (one at each disc pack) so it can accommodate parallel misalignment by the angular misalignment in each disc pack. It is suitable for axial displacement within specified limits. The SX coupling is available with 6, 8, and 10 bolt configuration. Bores up to 13 inches (330 mm) can be supplied on the largest sizes.
- Type SU This variation is the single flex unit with two hubs and one disc pack. It is suitable for angular misalignment only. It is often combined with hollow shafts to make a long light weight floating shaft coupling.
- Type SU This variation is the single flex unit with two hubs and one disc pack. It is suitable for angular misalignment only. It is often combined with hollow shafts to make a long light weight floating shaft coupling.
- Type SXC, SXCS This is the close coupled variation of the coupling. It is similar to the SX in that the disc pack is attached when the coupling is installed. In the close coupled unit the hubs are inside the spacer, which also makes it a reduced moment coupling. The coupling can be assembled with one or both hubs inserted into the spacer. This type of Lovejoy/Jaure disc coupling with a horizontally split spacer is designated as the SXCS.
- Type DI The drop out disc coupling has a factory assembled center section that includes the spacer, two disc packs and two guard rings. The disc packs are bolted to the spacer and guard ring at the factory and tightened to the proper torque. The entire package is mounted between the shaft hubs at the installation. Unlike the type SX the disc packs do not have to be attached when the coupling is installed. The DI coupling is available with 6 & 8 bolt configuration. Standard hubs and jumbo hubs are available, allowing up to 15.94 inches (400 mm) max. bore on the largest hub.
- SXGS and DIR These two coupling types are floating shaft couplings that fit in the place of the gear type floating shaft units. The couplings are designed to match up with the installed rigid gear coupling hubs that are mounted on the equipment shafts. Although matched by AGMA gear coupling size, the torque, speed and overall diameter should be checked when applying these replacement couplings. The SXGS is a reduced moment configuration and the DIR is a drop out configuration.
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