(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 […]
14
Jan
Jan
(1) It is suitable for continuous and single tasks. In industrial production lines, for example, when a particular operation needs to be carried out repeatedly without much variation, the spring balancer can provide consistent support. This kind of continuous work often occurs in packaging processes, where the same item is repeatedly lifted, moved, and placed. […]
13
Jan
Jan
The static load test shall be carried out according to the following procedures and requirements. Park the crane at the column. First, start the hoisting mechanism to conduct no-load lifting and lowering operations, and make the trolley run back and forth along the whole journey. This no-load trial operation shall be carried out no less […]
13
Jan
Jan
Hydraulic jacks serve as the intermediate medium in hydraulic transmission systems, playing the roles of transmitting and converting energy. At the same time, they also perform functions such as lubricating, preventing corrosion, cooling, and flushing among various components within the hydraulic system. The main performance requirements of hydraulic jacks are as follows: Appropriate Viscosity and […]
12
Jan
Jan
Tower cranes are large-scale hoisting machinery commonly used in building construction. Due to the structural characteristics of tower cranes, the tower body bears relatively large eccentric bending moments. Therefore, their installation and dismantling require strong technical skills, and safety management is rather difficult. A slight oversight can lead to major accidents with the destruction of […]
11
Jan
Jan
The winter maintenance of construction machinery is of great significance. Especially in the northern regions where winters are long and the temperature remains low for extended periods. When construction machinery is used in winter, the cold climate can easily lead to difficulties in starting internal combustion engines, freezing of cooling water and electrolyte, intensified wear […]
10
Jan
Jan
The reasons for the downward deflection of the main girder of overhead cranes are multifaceted and should be analyzed according to specific circumstances. Generally speaking, issues can arise from design, manufacturing, transportation, installation, and use. (1) The Impact of Unreasonable DesignIn the past, China followed the Soviet standards. The static stiffness of the main girder […]
31
Dec
Dec
Final Drive The final drive is generally used to change the direction of transmission, reduce the rotational speed, increase the torque, and ensure that the vehicle has sufficient driving force and an appropriate speed. There are many types of final drives, including single-stage, double-stage, two-speed, and wheel-side reducers. Single-stage Final Drive: A device that achieves […]