Gantry Crane: Crane Failure Analysis and Crane Maintenance

gantry crane is widely used for material handling. In order to prevent crane failure and crane accidents to ensure your crane safety, the common crane failure is analyzed and the crane maintenance methods are given below for your reference.

Gantry crane maintenance is the guarantee of the machine running and safe operation. The crane maintenance of the gantry crane should follow the following principles:

• Crane maintenance is simple, high maneuverability;
• To ensure that mechanical technology to be in good condition;
• The crane maintenance cost is not high, to minimize the disassembling process;
• Crane maintenance as soon as possible, lowering the transportation causes of adverse consequences;
• Use the advanced gantry crane maintenance technology and management methods, minimize crane maintenance work intensity.

Gantry crane with double girder for heavy material handling

General gantry crane failures and basic crane maintenance methods

The general gantry crane failures and corresponding maintenance methods are presented for you to solve your crane failures and ensure your gantry crane safety.

Gantry crane main girder failure and maintenance methods

Common failures to gantry crane main girders are gantry crane girder subsidence and horizontal bending girder, specifically:

(1) Gantry crane main girder sink failure and crane maintenance methods

Main reason of gantry crane main girder subsidence are as following:

• Gantry crane girder structure stress, lack of rigid, joint gap is too large;
• Overload use;
• Use more than fixed number of year;
• Heating or heat radiation;
• Chord or diagonal deformation;
• Storage, transport, loading way is not correct.

Crane maintenance:

In view of gantry crane main girder subsidence, the main crane maintenance methods include: the flame and prestressing two methods to repair; Reinforcement localized.

(2) The level of gantry crane main girder bending.

The main causes of the level of gantry crane main girder bending are:

• Make improper welding technology;
• Improper storage and transportation.

Crane maintenance:

Level for the gantry crane main girder bending, the crane maintenance method is mainly by flame rectification and appropriately with puller, top.

Gantry crane girder

Gantry crane track failure and crane maintenance methods

Common failures for gantry crane rail ways

• Track hold-down bolt looseness, defects, clamp open welding or deformation;
• Loose track error, orbit, rail surface cracks and scars;
• Rail surface wear serious,
• Joint gap is too large, or dislocation.

Crane maintenance methods for gantry crane rail failures

• Replacement or tighten the clamp bolt,
• Add welding clamp;
• Adjust the gauge and joint clearance to the specified value; Change the orbit.

Gantry crane rail

Gantry crane pulley failure and corresponding crane maintenance

Common faults for gantry crane pulley

• Rope pulley groove excessive wear and tear, or uneven wear.
• Pulley rim cleft, fall off easily jump rope;
• Pulley installation is unqualified;
• Pulley spindle, large amount of wear and tear of the wire rope wear.

Crane maintenance methods for gantry crane pulley

• Change the pulley rope groove;
• Of the wire rope jump by positioning, maintenance and repair
• Adjust the pulley installation location;
• Replace the new pulley.

Crane pulley for gantry crane

Problems of gantry crane wire rope and crane maintenance methods

Common fault for gantry crane steel wire rope

• Steel wire surface oil quantity is not enough,
• There were bent, broken, crushed, cable, twisted, the leakage phenomenon;
• Wire rope diameter reduction than standard, the number of broken wires within a lay length of more than 7 root.

Crane maintenance for steel wire rope of gantry crane

• Add lubricating oil in the surface of steel wire rope,
• Stop using the knot, broken strands wire rope;
• Replace the problem wire rope with the new wire rope.

Wire rope for gantry crane

Gantry crane drum problems and crane maintenance methods

Common fault for gantry crane reel

• There are cracks on drum cylinder;
• The drum shaft and key badly worn in shaft is cut off;
• Drum rope groove wear, wire rope jump or rope chaos, wear is too big.

Crane maintenance methods for gantry crane reel failure mainly include:

• Welding repair;
• Stop using the problem shaft, maintain and repair the key parts
• Replacement problem parts such as: the drum.

Gantry crane brake problems and maintenance methods

Common fault for gantry crane brake

• Because of a shortage of electromagnetic coil burned, electromagnet suction, the brake band of electromagnetic brake adhesive on a dirt brake wheel, activity joints stuck, hydraulic push rod brake failure caused by factors such as brake cannot be opened;
• Brake with rapid wear;
• Not effective braking;
•  Brake release easily adjust the position.

Fault crane maintenance and repair methods mainly include:

• Replacement battery coil;
• In relation to the maintenance of the voltage is too low reason.
• Clean with kerosene brake wheel and brake band, eliminate the sticking phenomenon, adjust the spring pressure;
• Adjust the brake or replacement brake wheel;
• Tighten the nut, overhaul nut or screw thread.

Crane brake for gantry crane

Gantry crane reducer problems and crane maintenance methods

Common fault for gantry crane reducer:

• there is a periodic gear shaking phenomenon;
•  Have a sharp metal friction. The chiming of the gear mesh are uneven;
• Overheating box, gear damage;
• Casing leak.

For the crane maintenance and fault repair methods mainly include:

• The gear for repair or replacement;
• Adjust the driver installation clearance;
• Replacement of bearings, replacement and supplement lubricant;
• Replace the sealing ring.

Crane reducer for gantry crane