SPRING-WRAPPED SLIP CLUTCHES

Transcription

1 SPG-WAPPD SLP CLUCHS AUS: Long life under continuous slip conditions. Unidirectional or bidirectional operation. Same or different clockwise and counterclockwise torques. Precise and stable limit torque calibration (range:. to ozf in.). Same torque at breakaway as at high slip velocities. Mounting provisions for gear, sprocket or pulley. Corrosion-resistant materials. APPLCAOS: ension control of film or tape drives ransmission overload protection PHO:.. AX:.. SPCAL DSGS: he standard line of slip elements provides a wide selection of limit torques, sizes and coupling arrangements. n addition, our engineers will modify designs to meet your specific requirements in such areas as: Configuration Driving arrangement Limit torques from a fraction of an ozf in. to several lbf ft. Calibration of torque to a tolerance of ± % Different limit torques for the two directions of rotation Spring windup and limit torque combination. he spring action of the slip element is useful for tensioning of tape and prevention of slack loops. * Stock units are calibrated with equal clockwise and counterclockwise slip torques corresponding to the tabulated Upper Limit orques. Other torques are readily available from full, down to / of the Upper Limit orque for each model. orque values are independent of each other for clockwise and counterclockwise rotation, and may be specified the same or different for the two directions. ** All clutches in this series have a pilot diameter K and three tapped holes for mounting a gear, sprocket or pulley on the input hub. Screw penetration into the clutch housing must not exceed the depth specified in column. Concentricity of pilot diameter K to bore C is.... max. All slip clutches are designed for long life under continuous slip conditions. he useful life of these elements is a function of the transmitted torque and slip speed. he life of the slip couplings & clutches is defined as the number of hours of continuous slip required to cause a deviation of % from the initial calibrated torque value. xtensive life tests have been performed on a number of standard units. he Life xpectancy Curves are designed for approximating the life span of standard slip clutches and couplings. Continued on the next page -

2 SPG-WAPPD SLP CLUCHS XAMPL: PHO:.. AX:.. f a slip clutch is to provide a torque limit of ozf in. at a continuous slip speed of rpm for hours, the smallest item which can be calibrated is from the SY SWCA.. series. he upper limit torque for this unit is ozf in. Limit orque atio = equired orque = / =. Upper Limit orque rom Life xpectancy Curves rpm &. ratio:,, ev Life =,, ev = =. Hrs. ev / Min. x Min. / Hour he. hours life value is less than desired hours. he next larger slip clutch belongs to the SY SWCA series. he upper limit torque for this unit is ozf in. Limit orque atio = / =. rom Life xpectancy Curves for rpm &. ratio: Life =,, ev =,, ev = Hrs. ev / Min. x Min. / Hour A SY SWCA.. series clutch will provide the desired life. rpm orque YPCAL LM L (SADAD CAALOG MODLS) / Upper Limit Upper Limit / Upper Limit Upper Limit / Upper Limit Upper Limit Hours of Continuous Slip in ach Direction,,, Hours of Operation Cycle: Sec. Slip, Sec. est,,,,, / Upper Limit Upper Limit - he table entitled ypical lement Life provides life in hours of operation for some typical slip speeds and torques of standard slip elements. he torque is presented in terms of / and full upper limit torque rating of a given slip element. AVAG POW DSSPAO (P) Continuous Slip P =. Cycle Slip P =. C where: = Slip orque [ozf in.] = Average Slip Speed [rpm] Duration of Slip / Cycle C = Duration of Cycle L (VOLUOS O SLP) x x x x x x x x x COUOUS SLP SPD (rpm) L XPCACY CUVS LM OQU AO

3 SPG-WAPPD SLP CLUCHS COVD Y U.S. PAS AD PAS PDG PHO:.. AX:.. OUPU A D CUSOM'S** PU ØL OUPU A D CUSOM'S** PU ØL ØK ØJ ØK ØJ ØH ØC G ØM G ØH ØC ØM ig. CH COMPO C ig. Catalog umber ore o SY-SWCA SY-SWCA SY-SWCA SY-SWCA SY-SWCA SY-SWCA SY-SWCA SY-SWCA SY-SWCA SY-SWCA SY-SWCA SY-SWCA SY-SWCA SY-SWCA SY-SWCA SY-SWCA SY-SWCA SY-SWCA SY-SWCA SY-SWCA SY-SWCA SY-SWCA SY-SWCA SY-SWCA * or ** See page A D G #- #- #- #- #- #- #- #- #- #- #- #- #- #- #- #- #- #- #- #- #- H J K L ig. M #-. DP. #-. DP. #-. DP. #-. DP. #-. DP. Upper* Limit orque ozf in. ± ± ± ± ± ± ± ± ± - Dissip. Power Watts

4 MAGC CLUCHS & COUPLGS APPLCAOS XAMPLS UWD SO COOL rake mounted on shaft of unwind spool or bobbin. rake ilm PHO:.. AX:.. nformation required: (xample) ull diameter = in. mpty core diameter = in. Average tension = lbf Velocity = ft./min. How to size: Avg. radius = [ull roll dia. + mpty dia.] / = ( +) / =. in. Avg. torque (lbf in.) = avg. tension (lbf) x avg. radius (in.) = x. =. lbf in. ilm Unwind - ension provided by hysteresis units. obbin Motor P OLL O PULLY SO COOL rake. Select Catalog umber SMCC-ML based on. lbf in.. Check Operating Curve he rpm occurs at the min. radius rpm = Velocity / (mpty dia. x π) = ( ft./min.) / [(. feet) x π] = rpm. lbf in. at rpm is okay. Clutch Motor Coil Winding - Constant tension provided by hysteresis unit. nformation required: (xample) Pulley diameter or nip roll = in. ension =. lbf Velocity = ft./min. How to size: orque (lbf in.) = ension x adius =. lbf x [( in.) / ] =. lbf in. ilm ensioning - Constant tensioning supplied by hysteresis unit.. Select Catalog umber SMCC-ML based on. lbf in.. Check Operating Curve rpm = ( ft./min.) / (. ft. x π) = rpm rpm is too high for continuous duty on the SMCC-ML unit.. Select Catalog umber SMCC-ML -

5 MAGC CLUCHS & COUPLGS APPLCAOS XAMPLS PHO:.. AX:.. CYCLG Clutch nformation required: (xample) Slip rpm = rpm orque = lbf in. cycle (% slip time of total cycle time) = % How to size:. Select Catalog umber SMCC-ML based on lbf in.. Check Operating Curve rpm is high, but as the duty cycle is only %, the Catalog umber SMCC-ML is okay. ottle Capping - Constant torque provided by a hysteresis clutch. Conveyor OVLOAD POCO OQU LMG SO SA (Motor Horsepower Method) Clutch Motor Chain and Sprocket Drive Coupling Sub Shaft Adapter Motor orque Limiting - Hysteresis clutch provides overload protection. nformation required: (xample) Motor hp = / hp Motor rpm = rpm How to size: orque (lbf in.) = (Motor hp x ) / Motor rpm = [/ hp x ] / = lbf in. Material Handling - Hysteresis clutch can provide overload protection and soft start.. Select Catalog umber SMCC-ML based on lbf in.. Check Operating Curve lbf in. is at the upper limit of safe continuous operation, but is okay. -

6 MAGC CLUCHS & COUPLGS ADVAAGS: o electricity o breakaway torque Constant torque independent of shaft (rotor) speed o contacting or wearing parts o friction elements same smooth torque year after year o magnetic particles to leak or contaminate end product Operable in some of the most difficult environments rake (with shaft) and clutch (with hollow shaft) available Custom designs available APPLCAOS: ig. As a Coupling his is for load protection or torque limiting. he coupling style unit is directly connected to a motor and turns at the same speed as the motor until the torque is reached. At this point it will slip and still generate the maximum torque. ig. As a Clutch he unit is connected to a motor by a timing belt or gear. he housing is driven and the shaft is the output end. ig. As a Payout rake rake is stationary and the reel or material is fitted to the output shaft. he tension on the material will vary with the diameter. HOW HY OPA: or Maximum orque All important internal clearances are ground to tolerances of less than. in. (. mm). Magnet assemblies surround hysteresis assembly. When like poles face each other, they produce maximum magnetic saturation of the hysteresis disc, forcing lines of flux to travel circumferentially through the hysteresis disc. or Minimum orque When opposite poles face each other they produce minimum saturation of the hysteresis disc. he lines of flux travel through the hysteresis disc. Combinations of adjustment angles between the two extremes give infinite adjustability. ecause there are no contacting surfaces, the setting can be maintained indefinitely. PHO:.. AX:.. S Hysteresis Assembly S Magnetic Assemblies S Minimum orque % % % % % % % % ig. ig. ig. Maximum orque S % % % % Hysteresis Assembly S Magnetic Assemblies S -

7 MAGC CLUCHS & COUPLGS OPAG CUVS PHO:.. AX:.. HOW O US H CUVS: ind the slip rpm on the X-axis and the torque on the Y-axis. otice the areas that represent safe, continuous duty; intermittent duty, such as five minutes on, five minutes off; and the area which is not recommended. Operating above that line for any period of time will cause overheating and possible damage to the unit. OQU (m) OQU (m).... ot ecommended ot ecommended... ntermittent.. Continuous... SLP (rpm) SMCCM.... ntermittent.. Continuous. SLP (rpm) SMCC-ML SMCCMML OQU (ozf in.) OQU (lbf in.) OQU (m) OQU (m)..... Continuous ot ecommended ntermittent. SLP (rpm) SMCC-ML SMCCMML.... ot ecommended.... ntermittent.. Continuous... SLP (rpm) SMCC-ML SMCC-ML SMCC-ML SMCCMML OQU (lbf in.) OQU (lbf in.) OQU (m). ot ecommended... ntermittent. Continuous. SLP (rpm) SMCC-ML SMCC-ML SMCCMML OQU (lbf in.) OQU (m).. ot ecommended.. ntermittent.. Continuous. SLP (rpm) SMCCMM... OQU (lbf in.) V:.. K -

8 MAGC CLUCHS & COUPLGS. lbf in. OQU OLCC O WAG PAS O CO MAAL: Housing and Shaft - Stainless Steel PHO:.. AX:.. M-. AP. DP X Q. SP. O Ø..C. OH DS A.. Ø. Ø. OH DS Ø CH COMPO Catalog umber SMCC- SMCC- SMCC- SMCC- SMCC- SMCC- Shaft / / / / / / A Shaft Length orque ange lbf in Weight lb

9 MAGC CLUCHS & COUPLGS lbf in. OQU OLCC O WAG PAS O CO HOLLOW O MAAL: Housing - Aluminum, lack Anodized inish Dial - Steel, lack Oxide inish PHO:.. AX:.. (X) APPD HOLS O OH DS S SCW PLACS APA L L. Ød Ø ØA ØD CH COMPO Catalog umber SMCC-ML SMCC-ML SMCC-ML SMCC-ML SMCC-ML SMCC-ML SMCC-ML SMCC-ML ore Ø HU WH KYWAY (. O OLY) L Length L D d A orque ange lbf in Catalog umber (ef.) SMCC-ML SMCC-ML SMCC-ML SMCC-ML SMCC-ML SMCC-ML SMCC-ML SMCC-ML Hub Set Screw hread Depth M M.. M M.. M M.. M M.. olt Circle Keyway / / Approx. Weight lb V:.. K -

10 MAGC CLUCHS & COUPLGS lbf in. OQU OLCC O WAG PAS O CO HOLLOW O MAAL: Housing - Aluminum, lack Anodized inish Dial - Steel, lack Oxide inish PHO:.. AX:.. () /- S SCWS APA O LOCKG OQU ADJUSM.... Ø /- AP. DP. X Q. SP. O A Ø..C. OH DS Ø Ø Ø. Ø. X. DP X OH DS O OQU ADJUSM CH COMPO Catalog umber SMCC- SMCC- SMCC- CLAMP COLLA ore h w orque ange lbf in. Keyway Dimensions ore... w +./-. h +./ Weight lb.... -

11 HYSSS AKS & CLUCHS CHCAL OMAO AUS: orque proportional to input current. orque virtually independent of slip speed. Smooth stable, noise-free operation. Long-life no-wearing components. Maintenance-free. nfinitely adjustable. APPLCAOS: ensioning of wire, cable, films, paper, etc. Positioning of fuel flow controls, film processors raking for motors and dereeling Load simulation for motor testing, fuse testing, etc. PHO:.. AX:.. OPOS: onstandard coil voltages Special mounting configurations Modified shafts Hysteresis clutches provide an efficient, smooth, electrically controllable link between a motor and a load. While presenting integral ball bearing supported input and output shafts, the clutch features a field (electromagnet) assembly that is prevented from rotating by fixing to a bulkhead. When the coil is energized, the input and output shafts are coupled by magnetic fluxes, thus driving the load. he torque transmitted is proportional to the current supplied to the device. OQU AS A UCO O PU CU: OQU % When a field setting is approached from zero current, it will produce less torque than if approached from prior current because of residual magnetism. Accurate and repeatable torque outputs are delivered when the setting is approached from the same direction. CU % -

12 HYSSS AKS & CLUCHS CHCAL OMAO APPLCAO XAMPL: o select a brake to tension a -inch ( mm) diameter pay-off reel in a system requiring total (web or strand) tension of lbf (. ) and a process speed of PM. PHO:.. AX:.. AK OQU () = orce () X adius (D/) = lbf (. ) X. in. (. mm) = lbf in. ( mm) or = ozf X. in. (. mm) = ozf in. SLP SPD (rpm) = linear velocity (V) (in./min.) / circumference (in.) or linear velocity (V) (mm/min.) /circumference (mm) rpm = ft./min. X / (π X in.) or ( m/min. X ) / (π X mm) rpm = GY (W) = nergy Dissipation requirement is calculated using basic DSSPAO horsepower formula X watts/hp W = ( (lbf in.) X rpm / ) X or ( (mm) X rpm / ) X W = ( lbf in. X rpm / ) X = watts or ( mm X rpm / ) X = watts otal Web/strand ension () Velocity/eed ate (V) Quick Check: he curves to the left can be used as a quick check to verify the kinetic power calculation. Simply locate the required torque on the vertical axis, move horizontally until you intersect the appropriate speed line, and then read vertically (up or down) to obtain the resulting watts or horsepower. Selection: rom the data on the following pages it can be seen that an SHY- Hysteresis rake which has a rated torque of ozf in. ( mm), a maximum speed capability of rpm, and an energy dissipation capability of watts continuous, would be the proper selection for this application. ote: n a clutch application, slip speed is the difference in rotational speed between the input and output members of the clutch assembly. n the above example, tensioning was being accomplished with a clutch inserted between a take-up reel and a motor driving at rpm. he actual slip used to compute the energy dissipation requirements would be rpm (clutch input speed) - rpm (clutch output speed = rpm). his difference in speed would obviously impact the result for energy dissipation. - Hysteresis rake ozf in. lbf in example.... rpm WAS rpm ull oll (D).... HOSPOW.

13 HYSSS CLUCHS MAAC- LY ADJUSAL OQU DPD O SLP SPD COL DAA: Voltage: V DC Maximum recommended speed is rpm PHO:.. AX:.. K HAD X L DP, HOLS QUALLY SPACD O A ØM.C. P H J G ØD ØC ØA Ø CH COMPO Catalog umber * SHYC-A SHYC-A SHYC-A Catalog umber * (ef.) SHYC-A SHYC-A SHYC-A Min.Static rated V DC ozf in.... D Drag orque De-nergized & Degaussed ozf in. ± ±.... * o be discontinued when present stock is depleted. G Min.... rated V C H ±.... nput nertia lbf in. sec Output nertia lbf in. sec. x -. x -. x -. x -. x -. x - J ±.... K #- #- #- L Min.... Dissipation M... Capacity Watts ±.... A ±.... P ± ±.... C Weight lb.... -

14 CLUCH & AK CHCAL OMAO A AD OQU VALUS Calculate load inertia (W ) Use the inertia chart to determine the inertia of the application components. o determine W of a given shaft or disc, multiply the W from the chart by the length of shaft or thickness of disc in inches. O: or hollow shafts, subtract W of the.d. from the W of the O.D. and multiply by length. n order to calculate the inertias of components which are made of material other than steel, use the multipliers found in the conversion chart (below) to establish the inertias of these components. nertia Conversion Chart n order to determine the inertia of a rotating member (shaft, disc, etc.) of a material other than steel, multiply the inertia of the appropriate steel diameter from the chart by: Material - Multiplier ronze. Steel. ron. Powdered Metal ronze. Powdered Metal ron. Aluminum. ylon. in. / / / / -/ -/ -/ -/ -/ -/ -/ -/ -/ -/ -/ -/ -/ -/ PHO:.. AX:.. W lbf in in. -/ -/ -/ -/ -/ -/ -/ -/ -/ -/ -/ -/ -/ -/ -/ -/ -/ -/ Determine clutch or brake torque value With the inertia value calculated, determine the torque requirement for the function. A) or Overrunning and Start-Stop (random start-stop) = W x rpm x t + friction torque* Where: = orque required from wrap spring, lbf in. W = load inertia, lbf in. rpm = shaft speed at clutch location t = time to engagement (. for clutch), sec. * rictional (drag) torque is the torque necessary to overcome static friction. t may be measured by a spring-scale or by deadweights, applied to a known moment arm so gradually as to make inertia negligible. t is that torque found just sufficient to induce motion. A O SL SHAG (Per of Length or hickness) W lbf in in. -/ -/ -/ -/ -/ -/ W lbf in

15 CLUCH APPLCAOS PM MOV Shaft-Mounted Clutches SCS Series LD OO AOAO A AMAU GA O PULLY HU L O CHA LOAD PHO:.. AX:.. PM MOV lange-mounted Clutches SC Series LD OO AMAU GA O PULLY HU L O CHA LOAD Shaft-Mounted Clutch Couplings SCSC Series LD AMAU lange-mounted Clutch Couplings SCC Series LD AMAU PM MOV LOAD PM MOV LOAD OO AOAO A HU OO HU -

16 SHA-MOUD CLUCHS ZO-ACKLASH AMAU O PAALLL LOADS PHO:.. AX:.. COL DAA: Voltage: V DC Other voltages and dissimilar bore combinations are available on special order. H K** L AMAU C CH COMPO Catalog umber SCS-A SCS-A SCS-A SCS-A SCS-A SCS-A SCS-A SCS-A SCS-A SCS-A S SCWS APA D in. M. Static * om. orque esist. lbf in. ohms OO wattage... Ø ØM ØA ore Width Height Keyway Dimensions Armature otor nergy Armature nertia nertia Dissipation lbf in. sec lbf in. sec lbf ft./min. ngagement Disengagement msec msec. x -. x -. x -. x -. x -. x -. x -. x -. x -. x -. x -. x -. x -. x -. x -. x -. x -. x -. x -. x - Catalog umber (ef.) ore A C ef. D H K** L M Weight lb. SCS-A SCS-A SCS-A SCS-A SCS-A SCS-A SCS-A SCS-A SCS-A SCS-A * ypical torque after burnishing; units shipped burnished. ** or Catalog umber: -A, -A, initial working air gap at installation shall be./.. -A, -A, -A, -A, initial working air gap at installation shall be./.. -A, -A, -A, initial working air gap at installation shall be./.. -A, initial working air gap at installation shall be./.. Keyway not available in rotor. o knurl available; SCS-A supplied with () #- holes on a Ø..C. SCS-A supplied with () #- holes on a Ø..C

17 LAG-MOUD CLUCHS ZO-ACKLASH AMAU O PAALLL LOADS COL DAA: Voltage: V DC Other voltages and dissimilar bore combinations are available on special order., PLACS APA in. M. PHO:.. AX:.. K ** AMAU L ØM SQ. Ø CH COMPO Catalog umber SC-A SC-A SC-A SC-A SC-A Catalog umber (ef.) SC-A SC-A SC-A ØC ØD, PLACS Q. SPACD Static * orque lbf in. A... wattage Armature nertia lbf in. sec. x -. x -. x -. x - C... OO D otor nertia lbf in. sec. x -. x -. x -. x - nergy Dissipation lbf in./min... Keyway Dimensions ore... Width Height Armature ngagement Disengagement ore msec msec. SC-A # SC-A * ypical torque after burnishing; units shipped burnished. ** or Catalog umber: -A, initial working air gap at installation shall be./.. - A, -A, -A, -A, -A, initial working air gap at installation shall be./.. Keyway not available in rotor. o knurl available; SC-A supplied with () #- holes on a Ø..C Ø OV KUL ØA K **... L.. M... Set Screws #-.. Weight lb..... ev:.. JC -

18 MAGC PACL CLUCHS & AKS AUS: Magnetic engagement without movement of mechanical parts. Smooth and silent. o backlash. early linear torque vs. current. o friction surface to wear out. Ultrafast response. Low output inertia. High torque-to-size ratio. nfinitely adjustable torque. PHO:.. AX:.. APPLCAOS: ensioning Stepping and ndexing Overload Protection Motor esting Controlled Start / Stop HOW H US WOK: he output disk/shaft assembly does not touch the housing. he gap in between is filled with a fine, dry stainless steel powder. he powder is free flowing, until a magnetic field is applied from the stationary coil. he powder particles form chains along the magnetic field lines, linking the disk to the housing. he torque is proportional to the magnetic field and, therefore, to the applied D.C. input current. Output torque is controlled by varying the D.C. input current. he torque vs. current curve is essentially linear, with a slight "S" shape. COL MAGC LUX LS MAGC PACLS GAP HOUSG (PU SHA O CLUCHS, XD O AK) While the input torque is less than the output torque, the brake or clutch won't slip. or brakes, the output shaft won't rotate. or clutches, the input shaft will be coupled to the output shaft, with no slip. When the input torque is increased, the brake or clutch will slip smoothly at the torque level set by the coil input current. Output torque is independent of slip rpm. O: See Accessories and Power Supplies on page - thru -. PC AD OQU OUPU DSK/SHA ASSMLY OQU vs. CU PC AD CU (D.C.) SADAD COLS,,, VOLS D.C. AY VOLAG AVALAL -

19 MAGC PACL CLUCHS ULAAS SPOSS SO O AS SA COL DAA: Voltage: V DC Voltages other than Volts DC available on special order. APPLCAOS: ensioning Overload protection orque limiting drives Controlled starts (and stops with a separate brake) he shaft becomes coupled to the output shaft with electrical excitation. PHO:.. AX:.. Ø. Ø. Clamp * Ø.. All shafts have flat at the end. ØD K OUPU Ø J (YP) in. LADS # AWG Ø PU.. PU * Ø. +. (YP) -. CH COMPO Catalog umber Catalog umber (ef.) SMPA-CDA SMPA-CD SMPA-CD SMPA-CD SMPA-CD SMPA-CD - Shaft O.D. ±. orque ange lbf in..... D ±. lect. Power watts om. ±. Shaft nertia lbf in. sec x - x - x - x - x - x - Speed rpm G ±. H ±. Mech. Heat Dissipation watts C Overhung Load lbf J ±.. * SMPA-CDA..... *. *.. SMPA-CD SMPA-CD SMPA-CD SMPA-CD SMPA-CD... **. **. ØC (YP)..... G View A..... Unforced esponse msec. K #-..C. x #-..C. x #-..C. x #-..C. x #-..C. x /-..C. * or input side see View A, threaded mount holes K are at output end only. his assembly is supplied with housing solder terminals with leads attached and with mounting clamps for #- screws on Ø..C. ** Shaft has / Keyway at from flat (both ends) C olerance +. / -. H.. Weight lb