elevator Parachute
The elevator overspeed governor is manufactured from carbon alloy steel grade 45 or 50 with tensile strength of 600–800 MPa. The governor rope diameter ranges from 6 to 16 mm with minimum tensile strength of 1800 MPa. Tripping speed is set at 115–140% of rated elevator speed with ±0.2 m/s accuracy. The triggering force for mechanism activation ranges from 50 to 200 N depending on elevator capacity. This system can stop the car or counterweight with a safe deceleration of 0.2–1 g 2–10 m/s². All components are tested and certified per European EN 81-1/20 and American ASME A17.1 standards.
The structure consists of two main parts: a centrifugal governor mechanism and a rope gripping device. The governor features tungsten weights with speed range of 0.5–10 m/s and 99% measurement accuracy. The gripping mechanism uses a wedge-type design with 10–15° friction angle and static load capacity up to 150 kN. A galvanized steel rope with red PVC sheath 8–12 mm diameter and minimum strength of 2100 N/mm² is employed. A manual or automatic reset system with less than 300 N force is integrated for reusability. Periodic testing includes speed trials, static load tests, and visual inspections every 12 months per manufacturer guidelines.
