In modern ports, terminals and freight yards, especially container terminals, the job scheduling system is one of the most important operating systems, which can effectively improve work efficiency and service quality, and reduce the incidence of errors.
However, the geographical location and special functions of the terminal have made it inconvenient to adopt a wired transmission network. Large cranes such as bridge cranes and tire cranes need to be moved, and the transportation lanes of container trucks are not easy to lay cables. The wireless MESH network has the characteristics of high mobility, strong confidentiality, anti-interference and convenient erection and maintenance. It is the ideal choice for such scenes with such features as frequent movement of equipment and inconvenient laying of wired networks.
The reporter learned from professionals that the current wireless dispatching system is becoming more and more popular in dock applications. In the entire dock area covered by wireless signals, the dispatch center can directly send job instructions to the vehicle terminal or handheld terminal. The staff can obtain the required commands and data anytime and anywhere, and command large-scale equipment such as bridge cranes and gantry cranes and cards in real time. Reasonable operations such as forklifts have greatly improved the efficiency of operations such as loading, unloading, port collection, container dumping, transportation, etc., and provided an excellent network foundation for the construction of information ports. However, the development of wireless terminals still faces many challenges, such as multipath effects, wireless interference, coverage dead angles and network reliability.
It is reported that the terminal has serious problems of wireless co-frequency and frequency interference. Using the general cable scheme, not only can it not meet the actual needs well, but also affect its daily operation. Recently, we noticed that Shanghai Waigaoqiao Container Terminal took the lead in introducing wireless MESH technology to wirelessly cover nearly 1 million square meters of yards, providing a stable information transmission platform for real-time dispatching system of card collection and GPS location of large equipment. Serving it is a young Chinese local high-tech company - Shanghai Xinchuang Communication (GBCOM) Technology Co., Ltd. With its special technical advantages such as smart antenna technology, fast power control technology, dynamic inter-frequency networking technology, seamless soft handover technology, packet-level dynamic routing adjustment technology, and video service optimization technology, GBCOM provides a full range of routers including wireless MESH products. MESH terminal cards, long-distance APs, high-performance wireless bridges and other highly competitive wireless broadband products have been applied to the yard wireless coverage of multiple container terminals, and are highly recognized by the market. The wireless network of Waigaoqiao Container Terminal fully reflects the wide coverage, high bandwidth, excellent wireless performance, strong anti-interference ability, safety and reliability of GBCOM wireless MESH network. In addition, GBCOM will also provide high-performance MESH cards, using terminal relays to achieve a full range of dead-end coverage of Waigaoqiao container terminals.
It can be seen that the use of high-tech communication means can not only reduce the cost of information construction, but also improve the operational efficiency and benefits of the terminal. It is understood that other container terminals across the country are also actively considering the use of wireless broadband communication products, fueling the construction of terminal information.
The Thrust Roller Bearing is used to bear axial and radial joint loads as the main axial load, but the radial load should not exceed 55% of the axial load. Compared with other thrust roller bearings, this kind of bearing has a lower friction factor, higher speed and a heart regulating performance.
The rod of the 29000 type bearing is an asymmetrical spherical roller, which can reduce the relative slipping of roller and raceway in operation, and has many advantages such as long roller diameter, large diameter, large number of rollers and high load capacity. Usually, oil lubrication is used, and grease can be lubricated at some low speed. In the design and selection, it should be selected first.
The 80000 type thrust Cylindrical Roller Bearing, the 90000 type thrust cone Roller Bearing and the AXK type thrust roller Needle Bearing can withstand the uniaxial axial load, which is much larger than the thrust ball bearing's axial load capacity, and has large rigidity and occupies small axial space.
Thrust cylindrical roller bearing and thrust cone roller bearing are suitable for low rotational speed, and thrust cone roller bearing speed is slightly higher than that of thrust cylindrical roller bearing. The thrust cylindrical roller bearing is a separable bearing. It can only withstand one-way axial load and slight impact, and can restrict the axial displacement of the shaft (or shell) in one direction, so it can be used for unidirectional axial positioning. But its bearing capacity is far greater than that of the thrust ball bearing. When roller is rolling, the roller will inevitably slide on the raceway because of the different speed of the two ends of the roller. Therefore, the limit speed of this kind of bearing is lower than that of the thrust ball bearing, which is usually suitable for low speed operation.
The standard design of thrust cylindrical roller bearing adopts a metal solid cage. According to the requirements of the user, other types or materials can be used. The thrust Tapered Roller Bearing can only bear one direction axial load, which can limit the unidirectional axial displacement of the bearing, so it can be used as a one-way axial orientation. Compared with the thrust cylindrical roller bearing, the bearing capacity is large and the relative sliding is small, but the limit speed is low.
Thrust Roller Bearing
Thrust Roller Bearing,Small Thrust Bearing,Mini Thrust Ball Bearing,Thrust Needle Roller Bearing
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