Port Machinery Research Articles

Research on Intelligent Monitoring System of Fangcheng Port's Bulk Cargo Ship Unloader

To intelligently monitor port machinery state of logistics operation in western China and to meet the stringent needs for future development of Fangcheng Port‘s business, the paper studies intelligent monitoring system of Fangcheng Port’s bulk cargo ship unloader. It consists of monitoring requirements analysis, system architecture design, software function design, key technology research, etc. The monitoring functions focus on the real-time monitoring of ship unloaders’ working state, fault information management, work load query, statistical report of work load, etc. In such a monitoring system, the wireless base stations and wireless LAN technology are used to achieve the collection and transmission of real-time monitoring information. This system has been operated in 14# and 15# ship unloaders of Fangcheng Port.

The Application of Speeder Based on Frequency Conversion and Fluid Viscous Soft Start in Port

The start and speed control problems of motor were analyzed in port machinery, the advantages of frequency conversion and fluid viscous start were synthesized, the speeder based on frequency conversion and fluid viscous soft start was designed. The start of motor can be protected by fluid viscous soft start, especially in the stationary start under the load. The motor can be realized infinite speed control by frequency conversion device, the use safety of motor is protected and the work efficiency is enhanced, then the aim of energy saving is realized.

A Three Dimensional Simulation Method of the Gantry Crane

Until now, many companies have developed lots of the port machinery remote monitoring systems. However, these monitoring systems usual display the operating status of the port machinery by the schematic diagram, Legend and data. The presentation of information is unable to describe the status of the large number of port machinery. In order to solve the problem, a three-dimensional simulation method of the gantry crane based on the WPF is proposed. This paper studies WPF technology and 3D modeling techniques, on this basis, proposes a kind of the gantry crane 3D simulation method based on WPF, establishes a new generation monitoring system based on 3D, immersive and interactive real-time simulation environment. This system could simulate the real-time 3D virtual scene of the gantry crane, and real-time 3D analog display port machinery running posture and operating environment. Experiments show that CPU and memory usage rate is low enough when the system is running. DOI: http://dx.doi.org/10.11591/telkomnika.v11i4.2404

The Comparison of the Estimation of Bridge Crane Real-Time Fatigue Life Based on JIS and FEM

This paper aims to achieve a crane real-time software programming methodology for estimating the fatigue life,the core idea of this method is to capture the whole life cycle of real-time stress load,gets real-time fatigue life results by using JIS and FEM and compares the two results.The method is more accurate than the traditional one and has guiding significance for real-time fatigue life estimation of port machinery.

Research on 3D Modeling and Virtual Assembly of Quayside Container Crane

As to the problem that the assembly cycle and costs of quayside container crane always exceeds 40% of the entire production cycle and costs, improving the assembly efficiency becomes an important link to enhance the competence of port machinery manufacturing enterprises. In the product assembling cycle, virtual assembly can help to improve assembly quality and reduce the cost. Based on the physical structure of 45t quayside container crane, 3D components model were developed, the assembly hierarchy and modeling process were provided. The simulation analysis of assembly sequence was taken based on the CATIA DMU platform and virtual assembly animation was generated. The assembly interference detection results were analyzed to verify the part assembling ability, the whole disassembly and assembly process was displayed, which can help the assembly workers making visual analysis of fitting operation rationality.

Research on Application of Duration-Cost Optimization in Port Machinery Manufacturing Project

Research on Application of Duration-Cost Optimization in Port Machinery Manufacturing Project

The application of fiber grating sensor network in port-machinery monitoring

A Fiber Bragg Grating sensor network is designed to implement the real-time health monitoring of port machinery. This paper describes the system design and its application in port-machinery monitoring. The results of field test on port machinery in Qing Huangdao (China) are discussed. Through the long-term monitoring on running state, especially the structure strain of port machinery, the status of the port machinery including security and fatigue life could be acquired and estimated exactly. It could provide the foundation for the use and maintenance of port machinery, and the security of the port machinery is improved. Long-term test results show good stability and repeatability of <8 με over two years operation with a precision of ±4 με and a resolution of 1 με.

The characterization of wear transitions in sliding wear process contaminated with silica and iron powder

When a machine is in operation, two moving surfaces interact to generate a large amount of wear particles. The wear debris generated inside the machine or contaminants from outside plays important roles in both two-body and three-body wear. For all mining and port machinery, their lubricants are very likely to be polluted by contaminants such as silica and other metallic debris such as iron and nickel. In order to seek a deeper understanding of the effects of different contaminants on wear process, this project investigated sliding wear processes when silica powder and iron powder exist in lubricants. Four sliding wear tests were conducted on a pin-on-disc tester with and without the contaminants. Visual inspection, ferrography analysis, particle quantity analysis using a particle analyzer, and numerical surface analysis using confocal laser scanning microscopy (CLSM) were conducted to study the wear particles and wear surfaces. Supported by the data generated from the comprehensive analyses on the wear particles and wear surfaces, the investigation of the effects of the added contaminants to the wear processes and wear mechanisms have been carried out and presented in this paper.

LOW BACK PAIN IN PORT MACHINERY OPERATORS

The occurrence of several types of low back pain (LBP) was investigated by a standardized questionnaire in a group of 219 port machinery operators exposed to whole-body vibration (WBV) and postural load and in a control group of 85 maintenance workers employed at the same transport company. The group of port machinery operators included 85 straddle carrier drivers, 88 fork-lift truck drivers, and 46 crane operators. The vector sum of the frequency-weighted r.m.s. acceleration of vibration measured on the seatpan of port vehicles and machines averaged 0·90 m/s2 for fork-lift trucks, 0·48 m/s2 for straddle carriers, 0·53 m/s2 for mobile cranes, and 0·22 m/s2 for overhead cranes. The 12-month prevalence of low back symptoms (LBP, sciatic pain, treated LBP, sick leave due to LBP) was significantly greater in the fork-lift truck drivers than in the controls and the other two groups of port machinery operators. After adjusting for potential confounders, the prevalence of low back symptoms was found to increase with the increase of WBV exposure expressed as duration of exposure (driving years), equivalent vibration magnitude (m/s2), or cumulative vibration exposure (yr m2/s4). An excess risk for lumbar disc herniation was observed in the port machinery operators with prolonged driving experience. In both the controls and the port machinery operators, low back complaints were strongly associated with perceived postural load assessed in terms of frequency and/or duration of awkward postures at work. Multivariate analysis showed that vibration exposure and postural load were independent predictors of LBP. Even though the cross-sectional design of the present study does not permit firm conclusions on the relationship between WBV exposure and low back disorders, the findings of this investigation provide additional epidemiological evidence that seated WBV exposure combined with non-neutral trunk postures, as while driving, is associated with an increased risk of long-term adverse health effects on the lower back.