Bi-Directional Overspeed Detection Units

The primary problem solved by bi-directional governors is "Ascending Car Catastrophe." In many traction elevators, an empty car can be pulled upward at dangerous speeds if the counterweight falls or the brake fails; a standard governor would ignore this, but our bi-directional unit triggers the safety gear or rope gripper to stop the car before it hits the ceiling. Another issue is "Nuisance Tripping" caused by car vibrations or power-on jerks. We solve this through "Damped Centrifugal Logic," using precision-ground flyweights and high-viscosity pivot lubricants that filter out high-frequency vibrations. We also address the problem of "Governor Resetting" in MRL (Machine-Roomless) elevators. When the governor is located at the top of a dark shaft, resetting it manually is difficult and dangerous; our units solve this with a "Solenoid-Actuated Auto-Reset" that can be triggered from the ground-floor controller. Furthermore, for high-rise buildings, the "Rope Weight Compensation" issue is critical; the sheer weight of a 100-meter rope can accidentally trip a sensitive governor. Our units feature an adjustable pre-tensioning spring that allows technicians to calibrate the trip force based on the rope's hanging weight. Finally, we solve the "Data-Gap" in maintenance; by integrating a high-resolution encoder directly onto the governor shaft, we provide the elevator controller with millisecond-accurate speed data, allowing for "Early-Warning" alerts before an actual overspeed trip occurs.