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Electro Hydraulic Thruster Brake

Electro Hydraulic Thruster Brake
Electro Hydraulic Thruster Brake
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Product Code : CCE 33
Product Description

Electro Hydraulic Thruster Brake

INTRODUCTION

Thruster brake is a device to retard the speed of moving machinery and to stop it accurately to the desired position. The braking force is applied to the brake shoes by a pre-stressed compression spring. The shoes press on the rotating brake drum retarding its speed, and finally stopping it. The releasing of the brake and compressing of the spring is done by thruster. Other release devices like pneumatic cylinder or manual release arrangements can be offered on request.

CONSTRUCTION AND OPERATION
Thruster brake has a pair of cast iron shoes which are lined up with friction pads. The shoes are hinged on main arm and side arm of the brake. Each of them have a hinge pin fitted in the base. They are connected to each other on top by a tie rod which is hinged in the main arm and locked to the swivel block in the side arm by a lock nut.

A crank lever is hinged on the main arm and the other end is fixed to the top clevis of the thruster by a hinge pin. A brake spring, is fixed on the main arm and is pre-loaded by a locknut on the lever, The pre-tension in this spring decides the braking torque. The thruster is fitted on the base by a hinge pin, When the thruster is not energized, the brake shoes are pressed on the brake drum fitted on the drive motor shaft and hold it under the effect of braking force provided by the spring In such condition, the brake is applied and the drum cannot rotate.

When the thruster motor is energized, the thrust provided by the thruster lifts up the crank lever which move the arms and the shoes away from the brake drum, there by releasing the braking force. The spring is compressed and braking energy is stored for the next cycle.

FOUNDATION
To install the brake, the foundation must be made ready with tapped holes of proper size as per the dimensions mentioned in the dimension table. Care must be taken to ensure the center line of the brake coincides  with the centerline of the brake drum and also the level of mounting pads “h” is matching with the center height of the brake drum.

INSTALLING BRAKE IN POSITION :

To insert the brake in position the  brake shoes are to be taken apart to clear the drum diameter. To do this, slacken the setting bolts and the tie-rod nuts in the side arm and pull it slightly. This will increase the distance between the brake shoes and the brake can now be inserted on the foundation bolts and the shoes can be positioned on the brake drum. Re-tighten the setting bolt and the tie-rod nuts. Tighten the mounting bolts.

INSTALLING THRUSTER ON BRAKE :

The thruster to be filled with sufficient quantity of oil as mentioned in the Thruster Table. To mount the thruster on the  brake, remove one side split pins on the thruster hinge pins of the brake and the lever. Remove both pins and re-insert them after positioning the thruster on the pin holes in the base and lever of the brake, Replace both split pins, Check that the  thruster movement is unobstructed when the crank lever is pulled manually and the thrust rod of the thruster moves freely.

Open the terminal box cover of the thruster and connect 3-phase, 415 Volts power supply cables to the three terminals on the terminal plate inside the terminal box. Terminate the earthing lead on the earth terminal provided on the thruster or brake. Replace the terminal box cover on the terminal box. The thruster is ready for operation.

ALIGNING AND SETTING OF BRAKE :

Next, align the brake shoes with the diameter and surface of the brake drum and adjust the nuts on the tie-rod such that both shoes grip the brake drum equally. Energize the power cables. this will cause the thrust rod of the thruster to move  up and the brake is released as the shoes release the brake drum. Adjust the gap between the drum and shoes to 0.3 to 0.5 , equally by adjusting the setting bolts on both arms.

For equal and uniform liner wear it is necessary to ensure that the shoes and the arms move equally. This is done automatically by the ball on one arm and a matching vee on the other arm.

Drum Diameter

Braking Torque

100 mm (4”) x 18 kg

06 kgm

150 mm (6”) x 18 kg

09 kgm

160 mm (6”) x 18 kg

09 kgm

200 mm (8”) x 18 kg

020 kgm

200 mm (8”) x 34 kg

032 kgm

250 mm (10”) x 18 kg

035 kgm

250 mm (10”) x 34 kg

042 kgm

300 mm (12”) x 18 kg

042 kgm

300 mm (12”) x 34 kg

062 kgm

400 mm (16”) x 34 kg

090 kgm

400 mm (16”) x 46 kg

110 kgm

400 mm (16”) x 68 kg

170 kgm

500 mm (20”) x 46 kg

190 kgm

500 mm (20”) x 68 kg

290 kgm

500 mm (20”) x 114 kg

485 kgm

600 mm (24”) x 68 kg

350 kgm

600 mm (24”) x 114 kg

580 kgm


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F-66, Okhla Industrial Area, Phase - I, New Delhi - 110020, India
Phone :+917042625140
Mr. Mukesh Malkani (Managing Partner)
Mobile :+917042625140
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