Hydrastart Couplings Superior Coupling Technology

Strength through Service Strength been manufacturing high quality, high specification gear units for over through Service Renold Gears has through Service Strength been manufacturing high quality, high specification gear units for over Renold Gears has 100 years andhas been manufacturingleading edge of gear technologygear units for over Renold Gears has always been at the high quality, high specification with innovative 100 years and has always been at the leading edge of gear technology with innovative products and has always been at the leading 100 yearsand power transmission solutions. edge...

Renold Gears inside front cover Coupling Selection Guide 02 Load Classification by Application 03 Service Factors and Selection 04 Hydrastart Fluid Coupling 06 Hydrastart Selection Chart 10 Coupling Rating Tables 11 Standard Available Options 12 Hydrastart Pinflex Coupling - Dimensions (mm) 14 Hydrastart Pinflex Coupling - With Brake Attachment 15 Hydrastart Gearflex Coupling - Dimensions (mm) 16 Hydrastart Pulley - Dimensions (mm) 17 Renold Chain inside back cover

Ø Ø O O Page 02 Coupling Selection Guide Ø Ø ƒ Angular ƒ End oat Ø Ø O O Parallel offset Torsional exibility Flexible Couplings should be used to accommodate any combination of misalignment conditions ƒ described below. ƒ At installation all couplings should be aligned as near to Ø perfect as possible. Ø 1. Angular Angular misalignment is present when the shaft axes are inclined one to the other. Its magnitude can be measured at the coupling faces. 2. Parallel Offset Axial misalignment is present when the axes of the driving and driven shafts are parallel but laterally displaced. 3. End oat (axial)...

Load Classification by Application Liquids - variable density M Brew kettles - continuous duty S Cookers - continuous duty S Mash tubs - continuous duty S Scale hopper - frequent starts M Clay working machinery Clay working machinery M Reciprocating - single cylinder H Conveyors - heavy duty Live roll Crane Drives - not dry dock Main hoists Bridge travel Trolley travel Cable reels Cutter head drives Manoeuvring winches Screen drive Utility winches_ Main hoist Auxiliary hoist Boom, luffing Rotating, swing or slew Tracking, drive wheels Bucket - uniform load Bucket - heavy load Bucket - continuous...

Page 04 Service Factors and Selection Table 2 Service Factor (fD) Driven machinery characteristics Prime mover (Drive input) Duration service hours/day Steady load Medium impulsive Highly impulsive Electric, air & hydraulic Motors or steam turbine (Steady input) Intermittent – 3hrs/day max 3 - 10 over 10 0.90 1.00 1.25 1.00 1.25 1.50 1.50 1.75 2.00 Multi-cylinder I.C. engine (Medium impulsive input) Intermittent – 3hrs/day max 3 - 10 over 10 1.00 1.25 1.50 1.25 1.50 1.75 1.75 2.00 2.25 Single-cylinder I.C. engine (Highly impulsive input) Intermittent - 3hrs/day max 3 - 10 over 10 1.25 1.50 1.75...

Page 06 Hydrastart Fluid Coupling A uid coupling suitable for soft starting high inertia machinery with reduced current demand, controlled acceleration and torque with motor overload protection. Coupling capacity • Maximum power @ 1500RPM 600kW • Maximum torque: 3500RPM Features and benets • High inertia controlled torque to 700 kW. • Soft start - motor starts on low load. • Allows use of standard squirrel cage motors. Hydrastart Couplings • Overload protection - fusible plug safeguards equipment. • Energy saving through reduced current demand at start-up. • Dampens torsional vibration, reducing...

Page 07 Operating Principles OUTER COVERS Outer covers DRIVING IMPELLER (A) Driving impeller (A) (OR PUMP) (or pump) Driven impeller DRIVEN IMPELLER (B) (B) (or turbine) (OR TURBINE) INPUT Input OUTPUT Output [ g 07 ] The coupling is partially lled with hydraulic oil to a level suitable for the absorbed power of the application and the acceleration characteristics of the driven machinery. The optimum oil ll is that which just allows the driven machine to accelerate from rest, thus providing the best drive overload protection. Power is supplied to the input side of the coupling by either an electric...

Page 08 Delayed Fill [ g 08 ] [ g 09 ] [ g 10 ] Hydrastart Delayed Fill Chamber (Type HS...R) HydraStart (constant ll) hydraulic couplings having a maximum oil ll will limit the starting torque to approximately 200% of nominal torque. It is possible to reduce this gure by reducing the quantity of oil in the circuit. The disadvantage of this method is that it produces increased slip and higher operating temperatures. To overcome these problems a delay ll chamber is available on sizes HS8 and above. This chamber is a modular option and allows a calibrated oil feed into the working circuit. In this...

'Soft' Starting Input speed ' Effect of starting on electric motors If a machine is driven by a squirrel cage motor without the use of a HydraStart fluid coupling, the following conditions arise 1. Motor will pull out 250/280% FLT. 2. Motor will consume 6 times FL amps. 3. Increase in motor temperature. Star-delta starting reduces overheating. However, the starting torque in star is only 30% that in delta and it is often necessary to use larger or more complicated wound motors, particularly with high inertia machinery. A = Locked rotor torque Effect of starting of electric motors when fitted...

Page 10 Hydrastart Selection Chart 725 9600 1440 1750 1000 800 2950 3600 HS13 600 HS12 400 HS11 200 HS10 HS8 100 80 60 HS6 40 kW 20 HS4 10 8 6 HS2 4 2 1.0 0.8 0.6 0.4 0.2 500 600 700 800 900 1000 1200 1400 1600 1800 2000 2400 2800 3200 3500 t/mn Larger coupling sizes are available up to 2000kW at 1400 RPM This chart may be used for the selection of coupling size. If your selection falls on a dividing line, always select the next largest size and use reduced oil ll. Hydrastart couplings can be used for up to ve equi-spaced starts per hour. ! WARNING Rotating equipment must be provided with a suitable...