What Are The Common Crane Sheave Failures?

 

Industrial sheaves play a vital role in cranes, mainly in terms of power transmission, power conversion, stability and safety, and wide application. Its application field is very wide. It is not only widely used in large-scale projects such as construction sites and ports for lifting and transporting heavy objects, but also in manufacturing, logistics and other industries to improve production efficiency.

 

sheave bearing damage

It may be due to aging or improper use of the bearing, which leads to bearing damage. The solution is to replace the bearing.

 

sheave abrasion

It may be due to the friction between the sheave and the wire rope. The solution is to replace the sheave.

 

sheave housing deformation

It may be due to the deformation of the housing due to impact or excessive load. The solution is to replace the housing.

 

The distance between the sheave and the wire rope is too large or too small

If the distance is too large, the wire rope will slip on the sheave; if the distance is too small, the wire rope will be twisted together. The solution is to adjust the distance.

 

The sheave is not flexible in rotation

It may be that the sheave is not lubricated enough between the sheave and the bearing or the sheave bearing is damaged, which causes the rotation to be inflexible. The solution is to increase lubrication or replace the bearing.

 

The sheave or wire rope is severely worn

It may be caused by long-term use or improper use of the equipment. The solution is to replace the sheave or wire rope.

 

The sheave is not installed firmly

It may be that the sheave is loose because the sheave is not installed correctly or the fixing bolts are not tightened. The solution is to reinstall and tighten the fixing bolts.

 

GloryRail has been selling crane pulleys for many years and has rich experience in supplying sheave pulleys. Based on the crane track system, provides customers with one-stop solutions for the crane industry.

 

The sheave block is an important component of the crane hoisting, generally composed of rolling bearings, sheaves, sheave shafts, and rolling bearing spacers. If there is a problem with the sheave block, it will directly affect the normal operation of the crane. So? What problems are prone to occur in crane sheave bearings? And how to solve them?

 

Overload

Overloading of the hoisted object directly causes the bearing force at the lifting sheave to increase, approaching or exceeding the force range, which is the most direct cause of bearing damage.

Solution: Add an overload limiter. Calculate the maximum bearing capacity of the bearing according to the load table. When the load force borne by the bearing is equal to the rated force, an alarm should be issued to prompt the operator.

 

sheave quality problem

The wire rope is directly wound on the lifting sheave of the crane, and the weight of the object is directly transmitted to the bearing through the wire rope and the sheave. Therefore, the bearing is easily damaged.

Solution: Change the sheave structure, increase the sheave thickness, and replace the bearing.

 

Unstable construction process

The wire rope is directly wound on the hoisting sheave of the crane, and the weight of the object is directly transmitted to the bearing through the wire rope and the sheave. Therefore, the bearing is easily damaged.

Solution: Change the sheave structure, increase the sheave thickness, and replace the bearing.

 

Design deviation

When designing the sheave and selecting the bearing, the safety factor must be considered and reserved according to the load, construction conditions, etc. If the safety factor is too small or the calculated load error is large, the bearing capacity of the bearing cannot meet the actual work needs. In addition, unfamiliarity with the working conditions will also cause the selected bearing to not meet the actual work needs. If a bearing with small parameters is selected, the bearing will also be damaged prematurely.

Solution: Strictly control the quality of the sheave, improve the sheave production process and strictly control the sheave factory inspection procedures, and control the flatness of the sheave rope groove center and the sheave center to meet the design requirements.

 

In short, timely maintenance and inspection of crane sheaves can reduce the occurrence of failures. If a failure occurs, timely adjustment and replacement of parts can extend the service life of the crane.