Eldro Thruster Brake Type – Operation, Installation & Specifications
Everything You Keen to Know About Thruster Brake Type With Eldro
Eldro Thruster Brake Type operated Drum Brakes operate on the same principle as MDT brakes but has improved features like elegant aesthetics and calibrated torque adjustment.
Know the Components and Operation of Steel Mill Duty Eldro Thruster Brake Type
The brake mounting base has two-arm, Main Arm and Side Arm fined on it by hinge pins Each of the arms carries a cast-iron brake shoe fitted with a woven brake liner pad. A tie rod connects the operating lever to the side am by a swivel block. A hinge pin connects the lever to the main arm. The lever-operated by the thrust exerted by electro-hydraulic thruster which is hinged to the base in a clevis. The brake torque setting arrangement pulls down the lever by pre-loaded compression spring Lower ends of the ears are interconnected by synchronization mechanism. The arms have a screw for setting the brake shoe to prevent rubbing of the liners on the brake drum when the brake is released.
When the thruster is energized, the thrust rod moves up and turns the lever clockwise with a hinge in the main ar as the pivot, and the sidearm turns anti-clockwise and moves the brake shoe away from the drum Simultaneously, the synchronizing arrangement tums the main arm clockwise and releases the shoe from the drum. The shoes free the brake drum with a pre-set gap. The brake is now released. Timing of lever pulls out the spring and stores energy for the next braking cycle When the thruster is de-energized, the spring force pulls down the lever and pulls the side and main arms and the shoes clamp with the braking force with spring force multiplied by the leverage of the mechanism. The thrust rod is pushed down by the spring force
The braking torque MB is proportional to the brake drum radius RB, co-efficient of friction of liner on the drum surface and the normal force F exerted by the spring at the brake shoe.
Me = px Fx RB
Know- Installation of Brake on Eldro Thruster Brake
The brake foundation is made as per the dimensional catalog.
Adjustment of Reserve Stroke
The brake should be adjusted such that only about 80% of thruster stroke used. This is done to ensure the brake is applied fully and also the wear of brake liner is accounted for. This is done while installing the brake.
Replacement of Worn Out Shoes
Unscrew tie rod nut N to release brake shoes from the drum.
Remove the hinge pin in the shoe and remove brake shoes by sliding it over the drum as shown.
Replace brake shoes with a new one in a similar manner and install it by putting a hinge pin in am.
Repeat (2) and (3) for the second arm.
Re-adjust brake.
Features
Robust and rugged design to withstand the arduous environment in Steel and Rolling mills, Lifts and elevators, Cement, and Concr plant machines.
Good designs and manufacturing processes ensure a reliable product.
Consistent braking torque due to properly selected and tested brake liner material.
The design ensures efficient distribution of forces.
Sturdy components and Thruster ensure long, trouble-free service and require no major attention.
Ease of maintenance and replacement of brake shoes without dismounting the brake.
Compact designs and elegant aesthetic looks.
Synchronizing mechanism ensures equal drum-liner clearance by
Release Devices
The brake is of a fail-safe design and stops moving components in the event of mains supply failure. Manual release or other release devices like Pneumatic or Hydraulic cylinders arrangement can be offered, in lieu of or addition to the thruster.
Thruster Specifications
The centrifugal pump and motor are immune to external overloading. Standard motor design is suitable for 415 Volts / 50Hz 3-phase supply. Other voltages and frequencies can be offered against the request. The star (wye) connected, Class F windings have an internal star point, and the three supply phases can be connected on the terminal board, irrespective of the phase sequence. The bi-directional radial flow impeller works with equal performance efficiency in both directions.
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Technical Data
Brake Type | Thruster Type & Stroke | Stroke | Mbr torque μ=0.4 Nm/kg-m | A | B | C | D | E | F | G | H | J | K | L | N | P | Q | R | d | *kg | |
SMD160 | ELD-23/5 | 50 | 200 | 20 | 580 | 160 | 470 | 160 | 140 | 85 | 135 | 390 | 55 | 120 | 125 | 8 | 75 | 70 | 85 | 12 | 12 |
SMD200
|
ELD-23/5 | 50 | 300 | 30 | 640 | 160 |
515
|
200
|
170
|
90
|
160
|
475
|
55
|
145
|
160
|
10
|
75
|
70
|
85
|
14
|
19
|
ELD-30/5 | 50 | 400 | 40 | 640 | 160 | ||||||||||||||||
SMD250
|
ELD-23/5 | 50 | 325 | 32.5 | 760 | 160 |
625
|
250
|
210
|
110
|
200
|
550
|
65
|
180
|
190
|
10
|
95
|
90
|
104
|
18
|
30
|
ELD-30/5 | 50 | 425 | 42.5 | 760 | 160 | ||||||||||||||||
SMD300 SMD315
|
ELD-23/5 | 50 | 420 | 42 | 885 | 160 |
745
|
315
|
260
|
125
|
250
|
650
|
80
|
220
|
230
|
10
|
118
|
110
|
126
|
18
|
50
|
ELD-30/5 | 50 | 550 | 55 | 885 | 160 | ||||||||||||||||
ELD-50/6 | 60 | 1050 | 105 | 925 | 195 | 660 | |||||||||||||||
SMD380 SMD400
|
ELD-30/5 | 50 | 575 | 57.5 | 1030 | 160 |
900
|
400
|
310
|
160
|
300
|
765
|
100
|
270
|
280
|
12
|
150
|
140
|
156
|
22
|
85
|
ELD-50/6 | 60 | 1100 | 110 | 1075 | 195 | ||||||||||||||||
ELD-80/6 | 60 | 1800 | 180 | 1075 | 195 | 775 | |||||||||||||||
SMD500
|
ELD-50/6 | 60 | 1400 | 140 | 1225 | 195 |
1040
|
500
|
385
|
190
|
370
|
870
|
130
|
325
|
340
|
13
|
190
|
180
|
191
|
22
|
130
|
ELD-80/6 | 60 | 2200 | 220 | 1225 | 195 | ||||||||||||||||
ELD-121/6 | 120 | 3400 | 340 | 1215 | 240 | ||||||||||||||||
ELD-201/6 | 60/120* | 5400 | 540 | 1215 | 240 | ||||||||||||||||
SMD600 SMD630
|
ELD-121/6 | 60/120* | 3300 | 330 | 1365 | 240 |
1175
|
630
|
465
|
250
|
455
|
1000
|
170
|
400
|
420
|
15
|
236
|
225
|
238
|
27
|
106
|
ELD-201/6 | 60/120* | 5500 | 550 | 1365 | 240 | ||||||||||||||||
ELD-301/6 | 60/120* | 8200 | 820 | 1365 | 240 | ||||||||||||||||
SMD700 SMD710
|
ELD-121/6 | 60/120* | 3800 | 380 | 1500 | 240 |
1355
|
710
|
525
|
270
|
500
|
1140
|
190
|
450
|
470
|
15
|
210
|
275
|
300
|
27
|
280
|
ELD-201/6 | 60/120* | 6300 | 630 | 1500 | 240 | ||||||||||||||||
ELD-301/6 | 60/120* | 9400 | 940 | 1500 | 240 |