Handling Specialty was approached by an international aerospace company to engineer and manufacture lifts for its jet engine pre-dress facility. It was imperative that the lift be completely level and without any sway as the pre-dress process was taking place. In addition, the safety of the workers as they moved around and under the engine was paramount. The engines being lifted weigh in excess of 30,000 lbs.
The lift platform uses four (4), 3” diameter, vertically positioned high efficiency ball screw assemblies. Each jack has enough capacity to safely support the load if one (1) of the other actuators were to fail. Ball screw jacks also have a load carrying spring installed in the ball nut to support the load in case of ball nut return tube failure.
The equipment is provided with various electrical and mechanical operational safety mechanisms to protect the equipment during normal operations. The electrical items include four (4) up and down travel limit switches, four (4) up overtravel limit switches, four (4) down travel limit switches, four (4) string pots and four (4) load cell monitors. Mechanically, the equipment is provided with four spring bumpers for end of travel limits, four down stops and cable type platform retention system.
- Passive platform retention system ensures the ultimate in safety for both technicians and equipment
- Smooth, synchronized and level motion throughout the range of travel
- Mechanical actuation for platform lifting
- Servo motor drive for smooth acceleration and deceleration
- Secure load holding at any elevation
- Lowered height of 32"