• National Engineer Enterprises

Passenger Elevators/Lifts

National Engineer Enterprises offers passenger elevators/lifts. These Quick Lift units are developed from worm reduction gearboxes, designed for the special purpose of lifts where silence and smoothness are required. Sleeve bearings used on worm shaft with angular contact ball bearings are used to take thrust, and also provided on wheel shaft for maximum load carrying capacity. Oil seals are provided in the gearbox. All gears have limited backlash for lift operation. Special care is taken for oil circulation so that ample quantity of oil reaches all sleeve bearings imparting longer life. These high quality units offer maximum maintenance and require only periodic oil checking. The controller of the lift is based on micro processor technology which minimises the number of moving mechanical parts and ensure minimum wear and tear of brake as brake is applied after the elevator has come to a stand still. The above mentioned feature in which precise speed control of the lift motor is achieved ensures accurate and reliable car leveling under all load conditions. Pulse width modulation with high carrier frequency technique is used in this drive which directly controls the current (torque) of the elevator motor. Constant speed control under all load conditions is possibly achieved due to drive used in the lifts. A user friendly digital operator which serves as a customised programming and monitoring tool for adjustment and trouble shooting is available only with the drive which minimises the breakdown time.