Heavy duty gantry crane has large loading capacity and high working efficiency. It is widely used for lifting and transporting in different sites, such as factory, warehouse, industrial site, railway construction site, port.
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The working performance and service life of each mechanism of crane depend on lubrication to a great extent.When lubrication, mechanical and electrical products maintenance, lubrication refer to their own manual, go cart, heavy truss car should be injected once a week grease. Hoist filling industrial gear oil (sy1172-80) 200, should often check the oil level, timely supplement.
The commonly used steel wire rope has phosphating coating steel wire rope, galvanized steel wire rope and smooth steel wire rope. In case of broken wire, broken stock or abrasion, new rope should be replaced in time.
The spreader must be checked regularly.
The pulley block is mainly used to check the wear condition of the rope groove, whether the wheel rim is cracked and whether the pulley is stuck on the shaft.
Check the rim and tread regularly, and replace the rim with a new one when wear or crack reaches 10% thickness.If the diameter difference between the two driving wheels on the tread is more than D/600, or if there is serious scar on the tread, it shall be cleaned again.
Every shift should be checked once.Brake should be accurate, the pin shaft must not be stuck phenomenon. Brake shoes shall be properly fitted to the brake wheel, and the brake shoe clearance shall be equal when the brake is released.
Walking fault develops the main reason is: due to the structure of gantry crane rigid level is higher, the normal operation, especially in the process of the walk action, it is difficult to ensure that the four fulcrum in the same plane, and because of the gantry crane walking motor oil for parallel connection way, at the same time, considering the hydraulic system pressure values are influenced by the factor of load force size, orbital uneven lead to drive hydraulic motor need in different stress levels. For the travelling wheel with the minimum pressure, it will first perform the rotation action. In this way, it may lead to the row of the wheel is overhead, and the corresponding drive motor load value is minimum, continuous idling or stop not running.
In the case of traveling fault of gantry crane, the specific maintenance method can be considered from the number of driving wheel configuration and oil way of connection.
First, the original of the gantry crane is equipped with four driving wheels up to eight, every two driving wheels using pin connection, form a balanced driving wheel, ensure that under the condition of the track ups and downs, still be able to walk around with track changes, increase the contact area.
Second, change the motor oil circuit connected in parallel to the oil circuit connected in series and parallel. In this way, it is ensured that each fulcrum has at least one motor driving the wheel to do work, avoiding idling and skidding problems caused by uneven force.