The reasons for the brake failure of elevators (including chain elevators) may involve multiple aspects. The following are some possible reasons, which are presented and summarized in points based on the relevant information in the reference article:

Severe brake pad wear:

If the elevator is used for a long time, the brake pads will gradually wear out with the number of uses. If the brake pads are not replaced in a timely manner, it will lead to brake failure.

Brake system malfunction:

Electric brakes may fail due to electromagnetic principles, making it impossible to convert electrical energy into braking force, or the motor bearings may not be able to effectively brake at the air gap position between the armature and the electromagnetic field.

Mechanical brakes may not be able to effectively contact moving parts due to the failure or improper adjustment of friction materials, resulting in the inability to achieve deceleration and stop movement.

Oil circuit blockage:

The brake system of the elevator needs lubricating oil to operate. If the lubricating oil pipeline is blocked by foreign objects, it will cause poor oil return and result in brake failure.

Brake pump failure:

The brake pump of the elevator is responsible for transmitting the air pressure generated by the compressor to the brake. If the brake pump fails, along with the hydraulic transmission device, the brake will fail.

Brake failure:

The brake is a key component for the elevator to stop steadily. If the brake fails, the brake will fail. Possible reasons include damage to internal parts of the brake, improper adjustment of brake clearance, etc.

Insufficient brake fluid:

When the brake fluid is insufficient, even if the brake system is normal, it cannot play a braking role, causing the elevator to be unable to brake.

Other mechanical faults:

Brake self-locking device failure, brake radiator failure, etc. may also cause brake failure. For example, a malfunction of the self-locking device may cause the brake to not be released; A malfunction in the cooling system may cause brake failure.

Summary:

Brake pad wear, brake system failure, oil blockage, brake pump failure, brake failure, insufficient brake oil, and other mechanical failures are the main reasons for elevator brake failure. To avoid brake failure, it is necessary to regularly maintain and inspect the brake system of the elevator, replace worn brake pads in a timely manner, clean blocked oil circuits, repair or replace failed brake pumps and brakes, etc. In addition, it is necessary to strengthen preventive measures and regularly maintain and inspect the elevator to ensure its safe and stable operation.

The main equipment produced by Hebei Makita: stage electric hoist, electric chian hoist, wire rope electric hoist，Hand chain hoist, lever hoist, pneumatic hoist and other lifting equipment