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The composition and maintenance methods of the ship crane power unit

Ship crane power units mainly include clutches, brakes, motors, reducers, wire ropes and drums. The motor is a single-phase capacitor motor with magnetic connection and power-off braking.
Jan 21st,2026 24 Visualizações
The power unit of the ship crane is mainly composed of a clutch, a brake, an electric motor, a reducer, as well as steel wire ropes and rope drums during the manufacturing process. The electric motor is a single-phase capacitor motor with a magnetic connection, and it is designed with a mechanism that brakes upon power failure. The motor of the ship crane is also equipped with a thermal switch, which can prevent the motor from overheating and burning out to a certain extent. Its reducer mainly consists of two-stage gear reduction, which is fixedly connected to the motor. The clutch, brake and rope drum are integrated. However, when the clutch is disengaged, it can achieve rapid descent. Operating the brake can control the descent speed to avoid impact.
The circular holes opened on the front of the power unit housing can be used to install hair dryers. Users can equip hair dryers as needed for forced cooling. The ship crane support part is composed of a main pole made up of a screw, a thousand-pound nut and a vertical pole, as well as a rotating arm. The rotating arm can rotate 360 degrees on the main pole. A limit switch is installed at the end of the arm to prevent overpositioning accidents caused by operational errors or button failure. By operating the button starter to achieve the forward and reverse rotation of the motor, the steel wire rope can be wound and released, and the objects can be lifted and lowered through the pulley of the bracket part to complete the hoisting operation.
Maintenance methods for the main shaft of a ship crane
1. Nanopolymer
This repair method is the best one so far. Its advantage is that it has good adhesion after repair and excellent compressive resistance. It has a very good effect on different types of wear. Repairs made with this special material can also enhance the compressive resistance of the ship crane. It will not cause too much wear and tear during the later use process.
2. Laser cladding
This kind of repair mainly targets the special material surfaces of the ship crane, and the repair process is rather difficult. If not operated properly, it is very easy to cause deformation or voids, especially under the requirement of high temperature. If this repair method is adopted for Marine cranes, it is recommended to operate under the guidance of technicians.
3. Brush plating repair
This repair method is relatively simple and easy to operate. The main shaft of the ship crane can be directly brushed with different chemical materials. However, this method also has obvious drawbacks. Brush plating can only achieve temporary repairs. If the wear is severe, simple brush plating will definitely not have a significant effect. Moreover, if it continues to be used, there may be a risk of it falling off.
The installation and application of ship cranes provide practical assistance for the improvement of the company's productivity. With the continuous development of the current social economy, the models and types of ship cranes are also constantly evolving and changing.
Lubrication carried out on time. Due to the fact that the parts of the ship crane in the tunneling working face will also be damaged under all normal application standards, long-term damage will lead to ineffectiveness. Regular lubrication can slow down the rate of part damage and increase the service life.
2. Immediate maintenance. When common faults occur in the application of the ship crane, immediate maintenance and resolution should be carried out. It is not allowed to repeat the common faults to prevent aggravating the fault level of the ship crane. In severe cases, it may even cause stable production accidents.
3. Determine all normal working loads. If the ship crane operates under long-term overload, the damage to parts will increase proportionally with the increase of load. The more severe the overload, the faster the damage will occur.
The Marine cranes currently produced and launched mainly achieve operation purposes through hydraulic control devices, which can well complete the loading and unloading of goods. Usually, the lifting devices can also be directly placed in the factory building for storage, making the operation, use and storage process more convenient. In addition, this lifting device is also quite flexible in the selection of power units. According to actual needs, two different types of motors, diesel and gasoline, can be chosen. Both types of motor equipment can ensure the normal operation of lifting work and can also well complete the lifting and transportation of goods, providing convenient conditions for the circulation of goods at the wharf.