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Magnetek MST E manuel d'utilisation

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Table des matières du manuel d’utilisation

  • Page 1

    MST/E Electric Shoe Brakes Mondel MST/E Electric Shoe Brakes Instruction Manual Part Number: 560022-R6 July 2006 © Copyright 2006 Magnetek Material Handlin g[...]

  • Page 2

    SUPPLEMENTS FORMING PART OF THIS MANUAL: DATE OF MANUFACTURE: APPLICABLE DIMENSION PRINT: E XPLODED VIEW: PARTS LIST: 8/17/2006 Page 2 of 33 MST/E Electric Shoe Brakes Manual 560022-R6 Installation and Maintenance Instructions MST/E Electric Shoe Brakes[...]

  • Page 3

    Table of Contents Chapter 1.0: MST/E Electric Shoe Brakes Warnings a nd Ca utions ................................................... 4 Chapter 2.0: General Description ........................................................................................................ 7 Chapter 3.0: Application .................................................[...]

  • Page 4

    Chapter 1.0: MST/E Electric Shoe Bra kes Warnings and Cautions Read and Understand All Warnings And Cau tions Printed In This Manual Before Commencing Installation, Adjustment Or Repair Chapter 5: INSTALLATION – Warnings and Cautions Anyone involved in the installation or serv ice of this brake must have: • Received specific training. • Had e[...]

  • Page 5

    Failure to properly center the bra ke and obtain unif orm lining contact results in localized heating and, ultimately, reduced torque, which can cause injury or death. Chapter 6: ADJUSTMENT – Warnings and Cautions Protect against the possibility of movement due to the effects of gravity, wind or other source of energy, which has the potential to [...]

  • Page 6

    Avoid contact with “live” terminals and preven t contaminan t entry. Replace the terminal box cover as soon as connections are complete. Chapter 8: OPERATIONAL TEST – Warnings and Cautions Always perform an operational test of the br ake after any replacement, adjustmen t, or repair. Read and understand the intent of the warnings published in[...]

  • Page 7

    Chapter 2.0: General Description 2.1: Mondel type MST/E spring applied, Hy-Thrust ac tuated general pu rpose brakes are designed for use on cranes and other severe braking applicatio n s in heavy indu stry. They ca n be used with any drive type applied to hoisting or horizontal travel motions. 2.2: There are two basic models of this versatile, high[...]

  • Page 8

    Figure 1 General Arrangement MST/E Electric Shoe Brake 8/17/2006 Page 8 of 33 MST/E Electric Shoe Brakes Manual 560022-R6 NOTE 1 : F I LL TO LO WER RI M OF FI LL E R HO LE . U S E O N L Y FLU I D I DE NTI FI E D O N TH E AC TUA TOR NA ME P L ATE . DO N O T O V E R- F I L L T O RQ UE ADJ US TME NT SC R EW ( B ) B R A K E L EVE R D R IVE EN D PI VOT [...]

  • Page 9

    Figure 1a General Arrangement MST/E Electric Shoe Brake With Automatic-Adjustm ent and Automatic-Equalizatio n A UTOMATIC A DJUSTMENT ( AA ) BRAKE LEVER DRIVE END PIVOT MANUAL RELEASE FILLER PLUG ( NOTE 1 ) OPTIONAL TIME DELAYS TERM INAL WIRING BO X TORQUE A DJUSTMENT SCREW LINK ARM (ACTUATO R END) BRAKE ROD PIVOT BLOCK LINK ARM ( OUTER END ) BRAKE[...]

  • Page 10

    Chapter 3.0: Application 3.1: The brake covered by this manual is type MST/E. This brake has a n adju stable external torque spring and is gene rally app lied on installations where the requi red torque cannot be pre - determined within well defined limits. 3.2: For a given wheel diameter the Associati on of Iron an d Steel Engineers (AISE) determi[...]

  • Page 11

    Chapter 4.0: Description of Operation 4.1: The brake is spring applied and a ctuator rele ased. A heavy-duty compression spring within the actuator pulls down on the brake leve r a nd forces the shoes against the wheel. 4.2: The actuator piston rod ex tends wh en power is applied, t he bra ke-shoe pressure removed and running shoe clearance e st ab[...]

  • Page 12

    4.12.(b): When the angle, throug h which the pin moves within the slot, does not allow contact with the sides of the slot, nothing happens! 4.12.(c): When the brake applie s, after some mi nimal amount of lining wear, the pin will contact the side of the slot in the collar, which will advance the ratcheting mech anism and prepare for adjustment the[...]

  • Page 13

    Figure 2 MST/E Brake Shown With Typical Brake Release L ev er Without Automatic Adjustment and Automatic E qualization Figure 2A MST/E Brake Shown With Typical Brake Release L ev er With Automatic Adjustm ent and Automatic Equalization 8/17/2006 Page 13 of 33 MST/E Electric Shoe Brakes Manual 560022-R6 CL UTCH DR I V E S HA FT T ANG , PIN (E ) CO L[...]

  • Page 14

    Chapter 5.0: Installation 5.1: After unpacking, visually inspect the brake a s sembly to ensure that damag e has not occurred during shipment and that there are n o loose or missing parts. 5.2: Prepare the brake support st ru cture and install the brake assembly subject to the following: 5.2.(a): Allow adequate clearance betwee n the brake and adja[...]

  • Page 15

    5.7: Type MST/E brakes can also be wall mo unted with the bra ke whee l shaft vertical . Again this requires the actuator hydra ulic section filler pl ug to be at the highest point possible with the actuator horizontal. For this mounting arr angement both equalizing bolts may b e required to ensure equal shoe cleara nce. 5.8: For any other mounting[...]

  • Page 16

    Chapter 6.0: Adjustment 6.1: Following any adjustment or rep air of the brake, test operation of the brake as described under “Operational test”, Chapter 8. 6.2: Complete adjustment is require d following any rework where a ny setting s were disturbed. Table 1 BRAKE WHEEL SIZES (Inches) TYPICAL RUNNING CLEARANCE BETWEEN LINING AND BRAKE WHEEL ([...]

  • Page 17

    6.4: Actuator Stroke Adjustment 6.4.(a): When power is applied to the actuator th e piston will be caused to extend. This will compress the external spri ng and raise the brake lever to provide operating clearance betwee n the shoe s and the wh eel. 6.4.(b): When power is removed from the actuator , the spring will retract the lever until the shoe [...]

  • Page 18

    6.5.(a).(iii): The correct li ning s are fitted. 6.5.(a).(iv): The linings are in good condition and bedding is com pleted. 6.5.(a).(v): The brake whe el is aligned and in good condition. 6.5.(b): Torque adjustment for Mondel MST/E brakes is adjusta bl e on site. Tighten or loosen screw (B), see Fig. 2, to set the torque within the prescribed range[...]

  • Page 19

    6.6.(g).(i): Install a castle nut, tighten nut until the flat washer is FLUSH with the side of the Automatic Equalization arm. Loosen or tighten t he nut no more than 1/8 of a turn, only enough to align the nearest cotter pin slot and hole. Install the cotter pin. This completes the assembly. 6.7: Shoe Clearance Adjustment 6.7.(a): The total availa[...]

  • Page 20

    6.8: Parallel Shoe Gap Adjustment 6.8.(a): For optimum lining wear distribution, brake shoes h ave controlled freedom to align with the wheel contour as the linings wear. 6.8.(b): Each brake shoe holder pivots on its link arm. Its freedom to rotate under gravity is controlled by a shoe holder friction mech anism. 6.8.(c): Spring loaded pins in each[...]

  • Page 21

    Figure 3 Section Through Shoe And Link Arm Drawn To Reveal Tension Dev ice WM F FILE WIP 01 02 1 2 8/17/2006 Page 21 of 33 MST/E Electric Shoe Brakes Manual 560022-R6 Fi g ur e 3 BR A KE R OD BR A KE WH E E L BR AK E SH OE SH OE AL IGN M EN T TE NS I O N DE V I C E S E C TI O N T H RO UG H S H O E A N D L I N K A R M DRA WN T O RE V E A L T E NS I [...]

  • Page 22

    Figure 3A Type AE Automatic Equalization Mechanism Ass embly 560022-R6 FRICTION BOLT CASTLE NUT FLAT WASHER A UTO EQUALIZE A RM A UTO EQUALIZE A RM BELLVILLE WASHER (3) COTTER PIN COTTER PIN (AE) IDLER PIVOT PIN COTTER PIN 8/17/2006 Page 22 of 33 MST/E Electric Shoe Brakes Manual[...]

  • Page 23

    Chapter 7.0: Electrical Detail 7.1: Operation of the actuator is not dependant of the direction of mo tor rotation. The cable leads can be connected to the U1, V1 and W1, (T1, T2, T3), term inals in any phase sequence. Figure 4 Electrical Connections 7.2: The motor leaves the factory already arranged for th e specified voltage, which is also shown [...]

  • Page 24

    Chapter 8.0: Operational Test 8.1: Heed all warnings and caut ions in addition to the owners’ safety pro ced ure s. 8.2: Follow all standards and local statute s. 8.3: Remove any drum chocks on a hoi st application. 8.4: As a preliminary test of the brake without l oad, energize the a ctuat or for one short jog. If the brake fails to stop and hol[...]

  • Page 25

    8.13.(a).(ii): Linings thinner than the o r iginal equipment may result in contact wi th the wheel only across the middle and cause vibratio n d uring stops. 8.13.(b): Do no use re-line d sho es where the castings are d amaged, worn or distorted. 8.13.(c): Square the brake to the wheel for optim um contact bet ween the linings and the whe el. 8.13.[...]

  • Page 26

    Chapter 9.0: Maintenanc e and Repair NEMA Standard ICS 9-1993, Part 1 recommends that brakes be fitted with new or re-lined shoes before the lining material is worn excessively. Refer to Table 4 for minimum thicknes s. 9.1: Replacing the Brake Shoes 9.1.(a): Remove and reinstall the brake shoes as follows. Use a lifting devise as necessary. 9.1.(a)[...]

  • Page 27

    Figure 5 Brake Shoe Removal 9.1.(a).(xii): Before starting sho e installation, check that the brake surface of the wheel is cle a n and free from oil and grease. 9.1.(a).(xiii): Next, verify that the lining surface w ill be true to the wheel when the shoe is installed. Carefully check lining contact with the wheel. Remove any high spots with emery [...]

  • Page 28

    9.1.(h): Refer to Chapter 6 and adjust the brake shoe clea ran ce as required. 9.1.(i): Refer to Chapter 8; bed and test the brake as described. 9.2: Removing The Actuator 9.2.(a): Secure against any possibility of an unexpected moveme nt when the actuator is removed. 9.2.(b): Lower the load to the floor and disconnect the load from the bottom bloc[...]

  • Page 29

    9.2.(f): Secure or support the actuato r b efo re attempting to remove the pivot pins. 9.2.(g): Refer to Fig. 6: remove the cotter pins and withdraw the pivot pins attaching the actuator to the brake body. 9.2.(h): Remove the complete actuator using appropr iate lifting device s. 9.2.(i): Should service be required, return t he actuator to Magnetek[...]

  • Page 30

    9.5.(g): Re-install the shoe assemblies as de scribed under the topic “Repla cing the Brake Shoes”. 9.5.(h): Re-attach the brake rod to the brake lever. 9.5.(i): Ensure that all shoe holder pivot and hitch pi ns are correctly installed. 9.5.(j): Test the operation of the brake as de scribe d under the topic “Operational Test”. 9.5.(k): Inst[...]

  • Page 31

    9.8.(d): If additional fluid is necessary for any reason, use only the fluid identified on the nameplate to ensure compatibility with the install ed seals and the specifi ed operating temperature range. DO NOT OVER-FILL. 9.8.(e): Table 3 specifies Recommend ed Hydraulic Fluid types for a range of ambient temperatures. Table 3: Recommended Hydraulic[...]

  • Page 32

    Chapter 10.0: Replacement Par ts 10.1: Brake Lining Replacement 10.1.(a): As a general guide, Magnete k recommends that brake linings be repla ced when the linings wear down to 1/16” minimum thickness. T able 4, taken from standa rd ICS 9-1993, Part 1: Electromagnetic Brakes, shows NEMA’s re com mended range of minimum lining thickness fo r bon[...]

  • Page 33

    Chapter 11.0: Long Term Storage 11.1: If a brake assembly will not be installed immediately, it can be stored indoors in a dry location indefinitely or outdoors for a reasonable time if adequately protecte d from moisture and corrosi ve atmosphere. The brake assembly must always be protected from di rect exposure to the elements unless specifi call[...]