ROSTA Motorbases. Self-tensioning Motor Mounts for all Friction Belt Drives slippage-free belt protecting maintenance-free ROSTA

Transcription

1 Motorbases Self-tensioning Motor Mounts for all Friction elt Drives slippage-free belt protecting maintenance-free

2 Customer enefits of the Rosta Motorbases in Friction elt Drives M 7 Offers short-term slippage by the start-up of large inertias, avoiding excessive tension on belt-carcass! Prevents from slack accruement, avoids heat generating slippage of the belts and averts from premature belt failure! M Offers fast belt changing, no need of complex readjustment of the pulleys! Offers ideal belt tension, constant transmission of nominal torque, less energy consumption, can lead to threefold belt lifetime! M 70 M 8 Fully maintenance-free tensioning system, no need of periodical compensation of belt elongation! Noiseless power transmission, all time ideally tightened belt sets! M 00

3 Selection table of Rosta-Motorbases according to the motor frame sizes Motor Frame 90S 90L P [kw] 000 min 6-pole motor P [kw] 00 min -pole motor..5 Motor Frame T 5T NEM P [HP] 0 min 6-pole motor 0.75 P [HP] 00 min -pole motor.5 / 00L.5. / T.5 M. T 5 Type of Motorbase M 7 Details 6 7 M 7 Standard Design Test forces for ideal belt tensioning The -Motorbase is offering with its mechanical pretensioning device the ideal calibration of the relevant belt tension, based on the test force recommendations of the belt suppliers. These recommended test forces for the most common V-belt sizes are mentioned in the test force table on the right. 6 mm deflection F ø d Test force table by initial V-belt installation (standard values for the most common types of V-belts) V-belt type Width [mm] Height [mm] Diam. of smaller pulley [mm] XPZ, SPZ XP, SP XP, SP Initial operation test-force F I [N] Operational testforce F O [N] S M 60M 60L / T T T 56T M M 8 Per 000 mm of span XPC, SPC Z C M 60L 0M 0L.5 0L.5 / 0 T 56T T 6T T 6T M 70- M 70- M M D Test force for V-belts. y ideal belt tensioning a deflection of 6 mm per 000 mm pulley center distance shall occur. (y shorter or longer span, the value 6 mm has to be interpolated.) 5S 5M T 65T M 0 M T M S 0M T T / 5 5 / 0 M 70 5 Usual positioning of the Motorbase in screen drive applications S T 5 / 0 0 / 0 M M 70 5 M L 90 / T M Overhead Configuration ase plate center mounted on element. Plate position horizontally on base. Installation of the entire base 5 inclined (aligned to exciter). M L 55S 55M 55L 90 / T /7 00 M 00 7 M 00 Linear Motion Screen Low-Head Types. long-side Configuration Directions regarding customized designs of motorbases on pages /. In case of possibly not mentioned motor frame sizes, please contact. Circular Motion Screen Ripple-Flow Types ase plate center mounted on element. Plate position horizontally on base. Motor shaft min. above or below the driven eccentric shaft. 5

4 Motorbases Type M 7 Type M 8 Mounting instructions for M 7 and M 8 scertainment of the ideal motorbase position M 7 M 8 longest tensioning travel, ideal position of the M 0 Offset 60 5 sufficient travel of the M M ( 0) ,5 6 ( 0) alter position of pretensioning device in this position, insuf ficient travel is given (contact ) 0 0 Offset 7 0 Support fixations M 7: oblong holes 5 mm M 8: oblong holes.5 5 mm lignment of pulleys and motor fixation screws according relevant motor size Loosen of the shaft screw (element axis) M 7: M6 and M 8: M 5 6,5 M ( ) ( 55) 88,5 rt.-no. Type NEM Weight [kg] 0 0 M7 90S 90L T 5T 00L T M8 00 M T S M 60M 60L M0 M0 T T T 56T Details regarding special designs, see pages /. Is the resulting tension-travel of the motorbase not effectual, we recommend to position the motor plate in off-set configuration, offering enlarged compensation travel M0 M0 6 5 Insert and tension the belts, control belt test force Tensioning of the belts according to belt suppliers recommended test force (table on page 5). M 7: by means of M 8: by means of threaded bushing M0 threaded shaft M6.5 6 Tighten of the shaft screw (element axis), start of operation M 7: M6 (locking torque 0 Nm) M 8: M (locking torque 0 Nm) Motor plate Side supports Pretensioning device Rubber suspension element with clamps (M 7: clamps / M 8: clamps) M 7 M 8 00 Steel parts blue painted Steel parts galvanized Retension: Generally retensioning is not necessary, however, we recommend to control the belt tension after a few days of operation (after running-in of the belts). 6 7

5 Motorbase Type M Mounting instructions for M scertainment of the ideal motorbase position Operation area above Motor plate standing ~ 0 inclined Operation area below Motor plate standing ~ horizontal 5 F Offset E longest tensioning travel, ideal position of the M sufficient travel of the M in this position, insufficient travel is given (contact ) 6, rt.-no. Type NEM 90 C D C D E F 90 Weight [kg] Support fixations oblong holes 60 mm lignment of pulleys and motor fixation screws according relevant motor size Loosen of the shaft screw (element axis) and of the screws on friction plate(s) M and M M 70-60M 60L 0 T 56T M 70-0M 0L T 6T M 00 0L 05 T 6T M 0 5S 5M T 65T Details regarding special designs, see pages /. ll -Motorbases M will be supplied with motor plate installed in off-set configuration. ccording to the final positioning of the base, the operating angle of the belts and the required tensioning travel, the motor plate can be altered in centered position on top of the element axis (recommendable by screen drive applications). Relevant threaded fixation holes are existent in plate. For possibly required additional tensioning travel of the motor plate, the adjusting block of the pretensioning device can be set in the second hole-position of the friction plate (). 5 Insert and tension the belts, control belt test force Tensioning of the belts according to belt suppliers recommended test force (table on page 5). Operation area below : adjust with M.5 screw (for tightening = screw block upwards) Operation area above : adjust with M.5 screw (for tightening = screw block downwards) 6 Tighten of the shaft and fixing screws on friction plate(s), start of operation M (locking torque 0 Nm), M6 (locking torque 0 Nm) Motor plate Side supports Pretensioning device (M 70- and M 70-: device / M 00 and M 0: devices) Rubber suspension element with axial-guide bearings and clamps (depending on size = 5 clamps) Retension: Generally retensioning is not necessary, however, we recommend to control the belt tension after a few days of operation (after running-in of the belts). 8 9

6 Offset E Motorbase Type M 70 Only M70x800 size Mounting instructions for M 70 scertainment of the ideal motorbase position longest tensioning travel, ideal position of the M sufficient travel of the M in this position, insufficient travel is given (contact ) xial-guide bearing must be on pulley side to avoid axial misalignment If motor position has to be changed due to specific transmission configuration, turn element 0 around between the side-supports. xial-guide bearing shall never be on fan-side of the motor! ( M0) C 0 Support fixations oblong holes 5 mm lignment of pulleys and motor fixation screws according relevant motor size 5 Loosen of the center screws (element axis) and of the screws on friction plates M0 and M6 6 D rt.-no. Type NEM C D E Weight [kg] M M T M S 0M T T M 70 6 S T M M L 57 Details regarding special designs, see pages /. ll -Motorbases M 70 will be supplied with motor plate installed in centered configuration on top of the element axis. ccording to the final positioning of the base, the operating angle of the belts and the required tensioning travel, the motor plate can be altered in off-set position. Relevant threaded fixation holes are existent in plate. 9T For possibly required additional tensioning travel of the motor plate, the adjusting block of the pretensioning device can be set in one of the eleven hole positions of the friction plate (). 6 Insert and tension the belts, control belt test force Tensioning of the belts according to belt suppliers recommended test force (table on page 5). Readjustment of the pretensioning djust tension with screw M.5 device to required tension travel. tighten shaft- and fixing screws (friction plates). loosen M0 hex-screw of block and select new position, assure new position of block again. loosen the shaft and fixing screws again. continue the tensioning with screw M,5 7 Tighten of the center and fixing screws (friction plates), start of operation M0 (locking torque 00 Nm), M6 (locking torque 0 Nm) Motor plate Side supports Pretensioning devices = devices Rubber suspension element with axial-guide bearing Retension: Generally retensioning is not necessary, however, we recommend to control the belt tension after a few days of operation (after running-in of the belts). 0

7 Motorbase Type M 00 Mounting instructions for M 00 scertainment of the ideal motorbase position longest tensioning travel, ideal position of the M sufficient travel of the M in this position, insufficient travel is given (contact ) ( 65) Support fixation oblong holes 70 mm lignment of pulleys and motor fixation screws according relevant motor size rt.-no. Type NEM Weight [kg] M 00 7 M L 57 9T S M / L Details regarding special designs, see pages /. For possibly required longer tensioning travel of the motor L-supports, the pretensioning device () shall be bolted into the front holes of the fork-head on the rubber suspension element. Insert and tension the belts, control belt test force Tensioning of the belts according to belt suppliers recommended test force (table on page 5). djust tension with mm hook wrench Motor L-supports Side supports Pretensioning device Rubber suspension element Do not use compressed-air power tools for tensioning! Retension: Generally retensioning is not necessary, however, we recommend to control the belt tension after a few days of operation (after running-in of the belts).

8 -Motorbases in customized design for special applications Example Fan drive in heat exchanger with vertically installed motor on M, special The M had been equipped with an additional bronze glide bearing to assure the axial position of the motor on the elastic -element. Example Drive motor of slurry-pump (centrifugal pump) installed on M 70 special The -Motorbase is assuring the continuous and slippage-free transmission of the required drive torque to maintain the high column of slurry material in mining fluid-transport systems. Example Installation of cooling compressors in busses on M 5 special, equipped with heat-resistant elastic inserts Rubmix 0 In this specific application, the Motorbase is fulfilling two main functions: keeps the belt tightened between Diesel-engine and cooling compressor, does prevent the transmission of compressor vibrations into the bus chassis. Calculation: Tensioning Motorbase y [mm] x [mm] d=90 n=0 P=5 s R =9 s F=0 s R =08 center of the element =579 D=0 Questionnaire: Tensioning Motorbase Customer: Date: Machine type: 0 mm D, R d, r diameter and radius of the driven pulley, D= diameter and radius of the drive pulley (above the element), d= the drive pulley (above the element) 90 mm 0 rpm 5 kw. - n speed of motor above the element of the motor) 0.5 kw the overturning torque (during start of the motor = P i i factor of power during the start process 700 mm max. required mm Pi distance of the pulleys 00 P power of the calculation mm horizontal distance of the pulleys calculation X vertical distance of the pulleys 7 N mm Y half of the belt opening angle belt 7 N a F belt force for pretensioning one belt force for the running process 08 F Rm resulting lever for tensioning the belts - s F resulting lever of the pulled belt calculation Nm z number of belts M Sv tensioning moment during pretension process M tensioning moment during running process calculation calculation 5 Nm R Nm s P Sm M torque out of the power Center Mounting Offset Mounting Technical data: Motor data 9. Motor helps tensioning the belts or. Motor frame size Motorbase has to lift the motor calculation 76 mm. Power kw 0. Center mounting or. Speed motor rpm Offset mounting calculation.. Weight of motor kg. Vertical distance DR element to motor Dimensions calculation 9 Nm. Offset distance 6. ø driven pulley mm mm. ssembling angle mm 5. ø drive pulley calculation 9 Nm 7. Center distance drive to driven pulley calculation 5 7 Nm 8. Total belt force (data from belt supplier). Remarks max. torque to the element 7 Nm element choice DR x00 mm initial force N Recommended assembling range: 90 +/-5 or 70 +/-5 mm Example Heavy-Duty Chain- and elt-tensioners made out of Motorbase components The Motorbase-elements are offering extremely high torques to tension heaviest chains and oversized belt drives. operating force N Sketch: Our proposal is based on received information and technical data from you. Other, unknown factors may influence the proper function of our products. In this case our proposal has to be revised. G, CH - 5 Hunzenschwil.0, IT Tel. + (0)6 897, Fax + (0) , info@rosta.ch, homepage:

9 Unlimited possibilities! few application examples: Changes regarding contents reserved. G CH-5 Hunzenschwil Phone Fax info@rosta.ch Internet T0.757