Though one may not think of gears as being flexible, gear couplings are very much considered to be a versatile coupling. A equipment coupling is certainly a mechanical device made to transmit torque between two shafts that are not collinear. The coupling typically includes two flexible joints, one set to each shaft. These joints tend to be linked by a third shaft known as the spindle.
Each joint generally includes a 1:1 equipment ratio internal/external equipment set. The tooth flanks and outer diameter of the exterior gear are crowned to allow for angular displacement between your two gears. Mechanically, the gears are equal to rotating splines with modified profiles. They are known as gears because of the relatively huge size of the teeth. Gear couplings are generally limited by angular misalignments of 4 to 5°.
Gear couplings ordinarily can be found in two variations, flanged sleeve and continuous sleeve. Flanged equipment couplings consist of brief sleeves encircled by a perpendicular flange. One sleeve is positioned on each shaft so the two flanges fall into line face to encounter. A series of screws or bolts in the flanges hold them together. Continuous sleeve equipment couplings feature shaft ends coupled jointly and abutted against one another, which are then enveloped by a sleeve. Generally, these sleeves are made of metal, but they may also be made of Nylon.
Single joint equipment couplings are used to connect two nominally coaxial shafts. In this application the device is named a gear-type versatile, or flexible coupling. The solitary joint allows for minor misalignments such as for example installation errors and adjustments in shaft alignment because of operating conditions. These kinds of gear couplings are usually limited by angular misalignments of 1/4 to 1/2°.
Gear couplings are torsionally rigid and so are supplied to two designs – completely flexible and flexible/rigid. A totally flexible coupling comprises two hubs with an external gear and two outer sleeves with an internal gear. It’s a universal coupling for a variety of applications and accommodates all feasible misalignments (angular, offset and mixed) and also large axial moments. Machines, bearings, seals, and shafts are therefore not put through the excess forces, sometimes of substantial magnitude, which arise from unavoidable misalignment usually associated with rigid shaft couplings.
A flexible/rigid coupling comprises one flexible geared half and one rigid half. It does not support parallel displacement of shafts but will support angular misalignment. This type of couplings are primarily used for “floating shaft” applications.
Sizes 010 – 070 all have crowned teeth with a 20° pressure contact. This enables to accommodate up to 1 1,5° static angular misalignment per equipment mesh. However, reducing the operational misalignment will increase the life of the coupling and also the life of additional machinery components such as for example bearings etc.
SERIES H Features & Benefits
Higher Misalignment Capability
Sizes 1-7 compensate for ±1 1/2° static angular misalignment per equipment mesh.
Minimizing working misalignment will increase the life of the coupling. Make reference to the Set up and Alignment Guidelines for alignment recommendations.
Larger Bore Capabilities allow the most economical size selection for shafts up to 10 5/8″.
Higher Torque Ratings because of larger tooth pitch diameters than various other couplings.
Versatility in that Series H’s are interchangeable by fifty percent coupling with competitive coupling styles.
1 1/2° Curved-Face Teeth certainly are a primary feature of the Series H coupling, sizes 1-7. The crowned hub teeth are a 20° full-depth involute tooth form with flank, tip, and root curvature. When
used with the straight faced sleeve teeth, these 1 1/2° curved face hubs offer increased shaft misalignment capability
CENTER FLANGE BOLTING
All couplings feature precision-drilled flange bolt holes, and tight tolerance Grade 5 flange bolts to make sure a long-long lasting flange to flange and fastener fit. Exposed bolt flanges are
regular. Shrouded bolt flanges can be supplied through size 5. Size #5 1/2 and larger couplings are only available with uncovered bolt flanges.
Each sleeve flange is supplied with two pipe plugs 180° aside. This permits assembly of a complete flex coupling with four lube plugs positioned every 90°, facilitating lubrication. The lube seal is usually a Buna-N O-ring to help retain grease and exclude contaminants. KHP or KSG coupling greases are suggested in order to obtain maximum operating life.
Ever-power COUPLING Features & Benefits
The Ever-power equipment coupling comes in two basic product lines:
Ever-powercoupling for medium to heavy-duty applications
Sizes 1 1/2 through 7 with integral end ring.
Sizes 8 through 30 with bolt-on end band.