Generally. quay cranes are used on the quay of the port. Their working characteristics are intermittent movement. that is to say. the corresponding mechanisms of picking. moving and unloading in a working cycle work alternately. The development and use of cranes in the market are more and more extensive.

Generally speaking. it is open-air work. so it must withstand the impact of rain and snow and the sun exposure. With the deterioration of the atmospheric environment. the acid content in the rainwater increases. so it is a huge test for the wharf crane that has been working in the open air. So rust prevention must be done well.

For the damaged part of the paint film on the metal structure of the crane. the surface of the component shall be cleaned and coated with antirust paint and decorative paint film to protect the metal surface from corrosion after rain and snow. In the movable part. such as the connection pin between sling and crane. guide wheels. trolley wheels. etc.. rust prevention work shall be done carefully.

After shutdown. brush these parts with a brush first. remove the impurities. moisture and rust spots that may lead to corrosion. and then use - 10 or - 20 diesel oil for these parts. because - 10 or - 20 diesel oil has stronger permeability than engine oil. and the spliced part with load can penetrate into it. making the metal surface produce oil film. and because of its low freezing point. it can resist low temperature.

After cleaning and lubricating with diesel oil. apply a layer of lubricating oil. The electric hoist with compact structure and the motor axis perpendicular to the drum axis adopts worm gear transmission device. Its disadvantages are: large length and size. large width. bulky structure. low mechanical efficiency. difficult processing. etc. The hydraulic system is double control. and the overflow control valve and magnetic contact pressure gauge can control the pressure accurately.

The electrical control department adopts low voltage control. which increases the safety of the control system. Calcium based or lithium based grease is a good choice. because these two kinds of grease have good mechanical stability. adhesion and water resistance. and the freezing point can also reach - 20 degrees. When applying grease. the coating should not be too thick.