Common Faults and Solutions for Elevator Safety Gears:
Here are some common issues with elevator safety gears and corresponding solutions based on problem analysis (for reference only):
1.Sand or Foreign Objects in the Safety Gear Jaw and Wedge Block
Sand or debris in the safety gear jaws or wedge blocks may prevent the safety gear from gripping the guide rail, causing the car to continue sliding down and fail.
Solution: Remove the safety gear and clean the jaws and wedge blocks.
2.Insufficient Clamping Force of the Speed Governor Rope Grip
The speed governor rope may slip in the groove and fail to trigger the safety gear if the clamping force is inadequate.
Solution: Adjust the tension of the speed governor rope appropriately.
3.Worn Groove in the Speed Governor Wheel
Wear on the wheel groove of the speed governor can lower the position of the rope, reducing or eliminating contact with the rope grip and causing slippage.
Solution: Adjust the position of the rope grip relative to the rope.
4.Excessive Clearance in the Safety Gear
If the clearance is too large, the wedge block may not contact the working surface of the guide rail even at the maximum pulling position, causing failure.
Solution: Adjust the safety gear clearance to meet standard requirements, ensuring uniform clearance on both sides.
5.Incorrect Dimensions in the Safety Gear Pulling Mechanism
An improper design of the pulling mechanism may result in insufficient travel of the pull rod, preventing the wedge block from reaching the rail surface.
Solution: Adjust the dimensions of the linkage mechanism to increase the effective travel of the pull rod. For most safety gears, this involves modifying the crank-rocker linkage structure.
6.Improper Installation Direction of the Speed Governor on New Elevators
If the speed governor is installed in the wrong direction, the rope grip might not clamp the steel rope during downward movement but may clamp it during upward movement, leading to failure.
Solution: Correct the installation direction of the speed governor.
7.Misalignment of the Speed Governor Rope and Rope Grip
If the steel rope is outside the effective clamping range of the rope grip, it cannot be clamped properly.
Solution: Adjust the relative positions of the wheel groove and the rope grip, correct the installation position of the speed governor, or adjust the position of the steel rope accordingly.
In summary, the elevator safety gear is a critical safety device that effectively ensures the safety of both personnel and equipment. To guarantee its reliable operation during critical moments, regular maintenance and inspections are essential.
