1. Low Voltage Check the starter potential when the motor is under load. The allowable voltage fluctuation range is ±10%. Low voltage can severely impede the normal operation of the lifting platform. The electrical components, especially the motor, rely on a certain voltage level to generate sufficient torque. If the voltage drops below the acceptable […]
18
Jan
Jan
The proper selection of steel wire ropes is crucial as it directly impacts the rope’s service life, prevents structural deformation, breakage, and unexpected failures. To ensure safe and efficient operation, the following principles are recommended: 1. When to Use Non-Rotating Steel Wire Ropes Non-rotating steel wire ropes are ideal for the following scenarios: Single Lifting […]
17
Jan
Jan
The proper functioning of steel wire ropes plays a crucial role in ensuring the normal and safe operation of port cranes. Before starting the machinery, the inspection of the wire ropes must not be taken lightly. It must be carried out in strict accordance with national regulations, starting from the outside and moving inwards. External […]
17
Jan
Jan
To adjust the rotational speed of an asynchronous motor, we can start with changing the following three parameters: the number of pole pairs of the stator winding, the slip ratio of the motor, and the frequency of the power supply. Changing the first parameter affects the synchronous speed. Changing the second parameter only enables speed […]
17
Jan
Jan
Introduction to Tower Crane Reducer Housings The reducer housing of a tower crane serves as a critical structural component, providing support and protection to the gears and mechanical parts inside. Manufactured primarily from cast iron, typically of grade HT150, these housings are designed to withstand significant mechanical stress during operation. However, due to prolonged usage, […]
16
Jan
Jan
I. Purchase (Rental) of Tower Cranes 1. Purchase of Tower Cranes When purchasing a tower crane, it must be bought from a professional manufacturer with a valid production license. The manufacturer should provide technical documents such as the whole-machine certificate, quality guarantee for high-strength connecting bolts, quality guarantee for hoisting wire ropes, quality guarantees for […]
16
Jan
Jan
When lifting heavy objects, the hook wire rope should remain vertical. It is not allowed to drag the lifted object diagonally. When lifting heavy objects, the center of gravity should be accurately located and the object should be firmly bound. If there are sharp corners, they should be padded with wooden blocks. Before the heavy […]
15
Jan
Jan
(1) The deviation of the position of the girder center line from the designed positioning axis shall not be greater than 5 mm. The alignment of the girder’s center line is crucial as it serves as the central axis for the entire crane structure. Even a minor deviation exceeding 5 mm can cause misalignment of […]
15
Jan
Jan
(1) The deviation of the actual centerline of the track from the actual centerline of the crane girder shall not be greater than 10 mm. Precise alignment of these centerlines is fundamental. In large industrial workshops where cranes operate continuously, any misalignment here can lead to uneven stress distribution on the crane structure during movement. […]
14
Jan
Jan
Precautions Before Installation 1. Preparation of Bearings Since bearings are treated with anti-rust measures and packaged, do not open the package until just before installation. Additionally, the anti-rust oil coated on the bearings has good lubricating properties. For general-purpose bearings or bearings filled with grease, they can be used directly without cleaning. However, for instrument […]