Crane Control Equipments

Okhla, Delhi

Features:

• These brakes are conventionally termed as single phase EM Brakes although they are to be operated on 2 phase.
• 3 Phase Brake are also available where a higher torque is desired.
• Since these brakes are in normally closed position, the release of the Brake shoes is affected by energizing the Electro Magnetic coil, which overcomes the spring force and the shoes are moved clear off the drum by lever/arm linkage system so that the drum is free to rotate without any friction.
• When the power in given to the Electro Magnetic coil the coil gets energized and in turn pulls the plunger down. The plunger in turn operates the arm of the brakes and the brake opens.
• The design of the brake is such that as the lining keeps wearing out due to normal operation of the brake, adjusts itself on its own to achieve the rated toque. When specified, brake drum or drum coupling both pin bush type and flexible geared type can be supplied along with the brakes.

Features :

• The Capacity of this Electro Hydraulic Thruster is 18 Kg. 
• Our Electro-Hydraulic Thruster is provided with Clevis-Lug mounting, allowing them to be mounted up to ten degrees either way from the vertical.
• All the Rubber surfaces are immersed in Oil, there by requiring very less maintenance.
• One outstanding feature of Crane Control Equipments make Thrustor is that any Mechanical Overloading cannot cause Overloading of the Electric Motor.
• If the Load is greater than what the Thrustor can lift, the Piston will remain at the bottom of the Cylinder and the impeller will rotate harmlessly in Oil.
• In the absence of Load the Piston stops at the end of the stroke and the Impeller rotates in the Oil as mentioned above.
• basically Crane Control Equipments make Electro Hydraulic Thrustor comprises of a Centrifugal Pump Impeller spinning in Oil there by developing a pressure head. 
• Since there is no outlet delivery port as in case of a Pump, the pressure developed is impressed on the Piston which is directly coupled to the Load to be lifted. 
• Thus a part of the pressure head is expanded in forming a kinetic head required to lift the Load.
• At the end of the Lift, either partial or full i e., when the Thrustor stalls, it is the full pressure head which is available. Thus the maximum thrust in the stalled position is always higher than the rated thrust.
• The Centrifugal Pump Impeller is driven by an Electric Motor the capacity of which depends upon the capacity of the Thrustor .In case of a 18 kg Thrustor the Motor is of 0.1 HP .
• The major components of the Crane Control Equipments make Electro Hydraulic Thrustor are, a Cast Iron cylinder filled with Transformer Oil, with a Aluminum Piston moving freely in it and a Drive Shaft down the center, through the Piston , to the cylinder.
• The Impeller draws Oil forcing the Oil beneath the Piston to give it an upward movement in the cylinder with pressure. The pressure is maintained when the Impellar is in motion.
• During transportation the Oil is drained out from the Thrustor hence at the time of commissioning the system required quantity of Oil needs to be filled up in the Thrustor. It is advisable to use only fresh Grade transformer Oil. 
• The quantity of Transformer Oil required to be filled up in the Thrustor depends upon the capacity of the Thrustor. 
• In case of 18 Kg Thruster 1.85 liters Oil is required. 
• Recommended grade of Transformer Oil is BS 148 or equivalent.