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42

7.4.2

Replacement of the brake

Caution!

All assembly and disassembly works should be done without load.
The electric chain hoist should be completely disconnected from power (Power off).

Low voltage control

1.  Loose screws of cap for gear cover.
2.  Remove cap.
3.  Disconnect brake cables.
4.  Loose screws of cap for brake.
5.  Remove cap.
6.  Pull the cables of brake out of the cable duct of casing.

Direct control

1.  Loose screws of cap for brake.
2.  Remove cap.
3.  Disconnect brake cables.

Continue with point 7.

7.  Loose the self-locking nuts of brake unit. The threaded bolts still remain in the motor cover.
8.  Remove worn out brake unit.
9.  Fit new double brake unit onto the motor shaft.
10. Fit the brake unit using the self-locking nuts.
11. Tighten the nuts evenly (tightening torques see table).
12. Connect brake cables according to wiring diagram.
13. Replace caps.

Type

Operation
brake

Emergency
brake

Self-locking
nuts

Tightening
torque [Nm]

Coil resistance
R20 nominal [

Ω]

Air gap S

L

nominal [mm]

Air gap S

L

maximal [mm]

SK05../...
SK07../...

BFK 457-08

BFK 457-08

3×M5

5.5

1681

0.2

0.5

Table 11: Data of the brake

Caution!

For order of spare parts the complete type of the electric chain hoist has to be submitted.

Casing

Motor shaft with hubs, clutch
spring and nuts

Operation brake

Emergency brake

Self-locking nuts

Figure 42: Assembly of the brake

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Содержание STAGEKET

Страница 1: ...perating instructions STAGEKET Electric chain hoists Please do not use the electric chain hoist before all operators have carefully read and understood this manual and signed the form on the rear cove...

Страница 2: ...2 LIFTKET Hoffmann GmbH Dresdener Stra e 64 68 04808 Wurzen Germany 49 3425 89 24 0 49 3425 89 24 99 sales liftket de www liftket de Ho 08 2017 englisch Original operating instructions 2017...

Страница 3: ...chain hoist 15 3 1 3 1 Hoist suspension with suspension eye 15 3 1 3 2 Hoist suspension with single hole suspension eye 16 3 1 3 3 Hoist suspension with hook suspension 17 3 1 4 Gear ventilation 18 3...

Страница 4: ...ke 41 7 4 2 Replacement of the brake 42 7 5 Electric control of the brake 43 7 6 Troubleshooting on the brake 43 7 7 Functional check of the brake 43 7 7 1 Operation and emergency brake double brake 4...

Страница 5: ...DIN EN ISO 13849 1 2008 Safety of machinery Safety related parts of control systems General principles for design DIN EN 60034 1 2010 Rotating electrical machines Rating and performance DIN EN 60034 5...

Страница 6: ...d the dynamic forces caused by the lifting equipment The chain hoist can only be used when it is suspended according to specification and the outgoing chain can leave the hoist safely by its own weigh...

Страница 7: ...initial operation before an expert or a trained specialist has inspected the equipment Do not carry out repairs without special knowledge Do not use the chain hoist with higher duty rate as marked on...

Страница 8: ...tween moving and static parts There has to be a visibility of the load by the operator at any time or any movement has to be done with a second person who has visibility of the load and the operator D...

Страница 9: ...simple building block system makes it easy to convert an electric chain hoists to different versions This allows the choice of single or double fall versions stationary or mobile with push or electri...

Страница 10: ...in inverted use Electric chain hoists can be applied in inverted use The subsequent reconfiguration of the electric chain hoist is possible Required parts for reconfiguration order from manufacturer...

Страница 11: ...box Oversize chain box with strainer strap Chain box Figure 3 Assembly options of electric chain hoists SB in normal use 2 1 4 Further completion possibilities Further completion possibilities will be...

Страница 12: ...view Figure no Description 1 Hoist body 2 Gear cover 3 Cap for brake 4 Cap for gear cover 5 Brake 6 Clutch unit 7 Motor pinion shaft 8 Rotor 9 Stator 10 Sprocket wheel 3 1 10 2 4 Figure 4 Sectional v...

Страница 13: ...ut by trained specialist in accordance with DGUV V54 BGV D8 24 3 1 Mechanical assembly 3 1 1 Hook tackle The hook tackle is used to attach loads for hoists in single fall version Rubber buffer with vu...

Страница 14: ...ctions 3 1 2 Hook block The hook block is used to attach the load in double fall version Casing Radial ball bearing Load hook complete incl pressure bearing and hook nut Rubber buffer Sprocket wheel S...

Страница 15: ...on The hole for the tandem trolley on the suspension eye must be on the chain box side Assembly The suspension eye section must be inserted into the specially provided suspension holes on the electric...

Страница 16: ...ided single hole suspension eye to the special suspension holes of the electric chain hoist with suspension bolts Use washers and secure with split pins By rotating the suspension eye by 180 the singl...

Страница 17: ...espective version on chain box side Assembly Fix the provided hook suspension eye to the special suspension holes of the electric chain hoist with suspension bolts Use washers and secure with split pi...

Страница 18: ...d bottom oil filling screws Oil filler plug Serrated washer Figure 11 Oil filler plug 3 1 5 Chain box 3 1 5 1 Mounting the chain box Plastic chain box Canvas chain box Flip bag Figure 12 Types of chai...

Страница 19: ...onditions are unknown If the hoist is fitted to a trolley the producer provides a tandem trolley to fit the chain box strainer strap see Figure 14 Take care that the strainer strap has to be tightened...

Страница 20: ...ttach the rubber buffer for the lift limiter onto the remaining dead end of the chain 7 Attach the lift limiter onto the 3rd link of the dead end Figure 16 D in upright use and 0 5 m away from the end...

Страница 21: ...falls 3 Loose the four screws part no 1 in Figure 18 of the chain guide than take the chain guide out of the hoist Figure 17 C and pull the U shaped fork back 4 Pull the chain end from the hook up to...

Страница 22: ...ot be used regularly as an operational limit switch If the lift limiter has a vulcanised metal washer then this should be mounted towards the electric chain hoist body 3 2 Electric connections The ele...

Страница 23: ...the load moves downwards swap L1 and L2 supply wires The mains supply must be turned off If the control is equipped with an emergency stop according to EN 60204 32 2008 it will be a red mushroom shape...

Страница 24: ...ages are available on request If the control is equipped with an emergency stop in accordance with DIN EN 60204 32 2008 an additional contactor is also located in the control box and the emergency sto...

Страница 25: ...V C1 8 Electronic overload protection to switch off lifting at more than 120 of the rated load Operating limit switch according to DGUV V17 BGV C1 8 for version with external operating limit switch Th...

Страница 26: ...Therewith it is ensured that enough chain weight for moving the chain safely into the chain box is left over even if the hoist has reached its lowest lifting position Available equipment Required func...

Страница 27: ...sition will be lower 3 6 2 External emergency limit switches Pin of limit switch for lowering Pin of limit switch for lifting Figure 24 External emergency limit switches Caution The emergency limit sw...

Страница 28: ...ial control circuit or a computer control The standard incremental encoder provides 100 impulses per revolution Incremental encoders can be fitted additionally onto the extended shaft of a gear limit...

Страница 29: ...locking nuts If the load on the hoist is less than the set value the suspension eye will swivel around one suspension bolt and activate a limit switch on the opposite side This switch cut off the powe...

Страница 30: ...d sensor Figure 28 Integrated load sensor Suspension point Load centre of gravity Suspension eye with load sensor Load sensor Electric chain hoist Figure 29 Suspension eye with load sensor Adjusting s...

Страница 31: ...riteria of load sensing equipment Type Integrated load sensor Suspension eye with load sensor Benefit Additional protection against inner overload chain jam Additional protection when approaching the...

Страница 32: ...rectified After actuating an emergency limit switch and switching on the power the hoist can only be operated into the opposite direction C Bridging slack chain prevention To lower load by pressing th...

Страница 33: ...girder must be installed by the user Push trolley Electric trolley with low voltage control 2 4 3 5 2 3 4 1 Push trolley with one suspension bolt crane component Electric trolley with one suspension...

Страница 34: ...be connected with a distance rod to prevent a collision of the trolleys Electric chain hoists with motorised horizontal movements Please make sure that only trolleys or other machines are used which...

Страница 35: ...Tightening torque Nm M16 1 5 75 Nm M22 1 5 150 Nm M36 1 5 560 Nm Table 7 Tightening torques Figure 34 Flexibility between chain hoist and trolley Caution Movement in the directions shown by the arrows...

Страница 36: ...ns with two step switches Low voltage control The contactors for switching the trolley motor are located in a contactor box The contactor box must be assembled with two hexagon socket head cap screws...

Страница 37: ...al Control Association T V are considered to be qualified to test cranes Trained specialists are highly qualified specialist personnel or the manufacturer s after sales service personnel 6 4 Additiona...

Страница 38: ...imated they may have to be shortened due to hard operating conditions two or three shifts high percentage of work with nominal load dusty or high temperature environment this maintenance work has to b...

Страница 39: ...for brake 5 Remove cap for brake 6 Loose the three fastening screws of brake unit 7 Remove worn out brake unit from the hub 8 Fit new brake unit onto the motor shaft 9 Fit the brake unit using the th...

Страница 40: ...embly works should be done without load The electric chain hoist should be completely disconnected from power Power off 1 Loose screws of cap for gear cover 2 Remove cap 3 Disconnect brake cables 4 Lo...

Страница 41: ...te type of the electric chain hoist has to be submitted Casing Motor shaft with hubs clutch spring and nuts Operation brake Emergency brake Fastening screws Figure 40 Assembly of the brake 7 4 Double...

Страница 42: ...olts still remain in the motor cover 8 Remove worn out brake unit 9 Fit new double brake unit onto the motor shaft 10 Fit the brake unit using the self locking nuts 11 Tighten the nuts evenly tighteni...

Страница 43: ...zero Coil has contact to ground or between the windings Replace the brake Wiring wrong or defect Check and correct wiring Rectifier defective or wrong Compare wiring at rectifier with wiring diagram...

Страница 44: ...the emergency brake is longer than of the operation brake Separate test of the operation and emergency brake DGUV V17 BGV C1 only The DC supply of both magnetic coils are equipped with a plug connect...

Страница 45: ...ment of the load will be prevented because the load can be held at every lifting point by the brake The clutch unit acts as a dry clutch with asbestos free linings The clutch is easily adjustable and...

Страница 46: ...lectric chain hoist 13 12 11 8 Tag on the magnetic coil of the brake Figure 45 Adjustment of friction torque of the sliding clutch The sliding clutch is set with the test load by the manufacturer Afte...

Страница 47: ...mbly group Caution The assembly has to be done in reversed order 7 10 Load chain Hoist chains are means of load carrying which require official approval It is therefore important to observe the guidel...

Страница 48: ...dimensions Chain dimensions mm mm 4 12 5 15 5 2 15 7 22 7 2 21 Nominal diameter of link d in mm 4 5 5 2 7 7 2 Wear limit of diameter dm in mm 3 6 4 5 4 7 6 3 6 5 Length over 1 link t in mm 12 15 15 2...

Страница 49: ...Construction of the brake type EFB Caution If the brake linings are worn so that the air gap is about 0 9 mm it is necessary to adjust the gap Readjustment of the brake type EFB 1 Dismantle the fan co...

Страница 50: ...ifficult in practice to take note of the duty rate during the lifting operation We therefore give the following practical guidelines 8 1 Short time duty This duty type is not permissible for the slowe...

Страница 51: ...load 20000 kg transported load After 30 minutes of operating time 1 5 minutes break for each minute of operating time must be taken i e 3 times the operating time This break is usually necessary for...

Страница 52: ...lubrication The oil must be changed during general overhaul of the electric chain hoist in case of visible leakages in case of excessive breathing out of the gear vent after each opening of the gear...

Страница 53: ...f the electric chain hoist the chain links must be lubricated over the whole length of the chain by a creeping gear oil Lubrication of chain Lubricate chain without load Lubricate the shaded areas of...

Страница 54: ...bearings Supplier Lubricant Fuchs Renolit Duraplex EP2 EP3 Fuchs Lagermeister LX EP2 Table 1 Lubricants of bearings 11 4 Trolley Caution The gear pinion and the geared wheels of the electric trolley h...

Страница 55: ...55 13 Example of Declaration of Conformity...

Страница 56: ...56 14 Example of Declaration of Incorporation...

Страница 57: ...57...

Страница 58: ...d by appropriate skilled and qualified operators Further information about other operational conditions is not considered herewith In case of any deviations to the normal operations such as unusual no...

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