In the 600 and 50400 air separation units, as the raw material air is supplied and the process is started up to 452 甩, 1 often. Reached 202 out of 202, the working conditions of the card. Filled with polyfluoroethylene oil-free lubrication technology, the overall structure is two-row symmetrical type, divided into four sections of compression, each section has a separate cooler and water separation device after exhaust. The compressor is directly driven by the motor through the coupling.
The Air Compressor was put into the operation hall for a total of about 600 inspections. It was found that the stage cylinders were faulty. The air compressor stage pressure continuous overpressure stage piston rings and guide rings were seriously worn. This overspeed wear phenomenon occurs repeatedly and spreads to the level.
1 Out of the 81745 air compressor overspeed wear 1745 type under normal circumstances, the life of the piston ring guide ring made of polyvinyl fluoride, the grade should be 40001! Left and right, the level should be around 20, or so, such as much lower than this use limit, called overspeed wear.
1. Wear condition check air compressor stage piston ring and guide ring, wear condition name radial thickness maximum wear amount maximum wear rate stage piston ring level guide ring stage piston ring stage guide ring through the comprehensive analysis of pistons of all levels The wear is more serious, the maximum wear rate of the piston ring and the guide ring is 24 times of other levels, and the wear of the first and last piston rings is particularly serious. The wear rate of the stage piston rings exceeds the use limit of the filled vinyl fluoride wear.
12 piston rings and guide rings produce overspeed wear. The reason for the oil-free lubrication mechanism is that it relies on the filling of polyvinyl fluoride and the corresponding self-lubricating film which is extremely thin on the friction surface when the metal surface is ground. There are many factors that affect the working life of filled polyvinyl fluoride, such as the composition of the filled polyvinyl fluoride and the cleanliness of the process conditions and the technology used for installation.
If the humidity of the air is too large, the condensed water is likely to be deposited on the mirror surface of the cylinder, which will cause the self-lubricating protective film remaining on the metal surface to be damaged. The 208 oil-free lubricating air compressor requires that the cylinder water outlet temperature should be higher than the corresponding inlet air temperature. 250. According to the operation record, the cylinder air intake temperature is similar to the grade 15, even if the flow rate of the stage cooling water is adjusted to be small, the water temperature is Still lower than the intake air temperature by 2, 3.
The sealing function of the piston ring is established by the outer side of the piston ring which is close to the cylinder sleeve surface, the bottom plane of the piston ring is closely attached to the bottom plane of the ring groove and the labyrinth of the entire piston ring group.
1 The activity of the sacred sacred sacredness is weakened, that is, when the household 2 is raised, the household is enlarged. When the axial gap 3 is small, it will close the household 1 and the piston ring seal will be invalidated. At the beginning of the compressor operation, the primary ring bears the main load and wears a lot, causing a change in the distribution of pressure over the entire length of the seal. The high-end leakage airflow is large, and the heart behind the ring rises. This pressure change reacts to the end ring. The pressure in front of the end ring is increased and the back pressure behind the end ring is unchanged. Causes the end ring to work under very hot pressure differences. Leading to rapid wear, the chain reaction of the piston rings of the group causes the entire piston ring to be flat due to the poor filtration effect of the Air Filter provided by the air compressor, the high dust content of the air, the fouling of the dust after entering the cylinder, and the destruction of the oil-free lubrication The working bar makes the axial clearance too small. The piston ring is thermally expanded and blocked, and finally, the stage exhaust temperature is higher. Grade cylinder liner material, 1602 surface roughness is large, the grade cylinder blow-off valve is not designed reasonably, it is not often drained, and the cylinder cavity is prone to abnormality.
2 technical improvement measures to replace the air filter or increase the channel filter. In order to reduce the dust content of the air entering the cylinder, to ensure the normal working conditions of the cylinder, in order to fill the polyvinyl fluoride to establish a self-lubricating film to meet the requirements of oil-free lubrication = in view of the serious wear of the 208 air compressor stage piston ring, and the service life is more Short, graded piston ring packing materials should be retrofitted on the basis of only fiberglass. Appropriately increase the thermal conductive agent bronze powder and graphite powder vulcanized strontium powder. It can also be formulated with a stage piston ring to enhance self-lubrication and improve wear resistance.
According to some information, we will introduce various kinds of curtain air media with humidity above 70 dew point. The filler is preferably carbon graphite = the piston ring is formulated to be filled with 3 glass fiber 3 carbon graphite 2 decopper powder. The pit has to be used for reference. Practice has proved that the piston life can improve the letter = air humidity is too large, the cylinder mirror surface is easy to precipitate condensate. In order to solve this problem, we have borrowed some effective methods to mix the interstage coolers. By controlling the opening of the cutoff. Adjust the outlet temperature of the condensate to just the right amount.
For the working state of the cylinder, the cylinder liner uses 3013 material to improve the wear resistance and corrosion resistance of the cylinder. In a certain degree, it is easy to establish a self-lubricating film in the friction. 1Upper page 15 alarm function can be Ensure that the power supply operates stably in various industrial environments.
The industrial Ethernet redundant ring network for mines also has the following characteristics: its data transmission rate is 100, for example; it can provide sufficient bandwidth.
Thereby ensuring accurate and fast transmission of data. In the process of data transmission, the conflict is slow, the delay is slow, and the rate is fast. Both of them adopt the same interactive and open data access technology to meet the diversified requirements of different mines. The flexibility is high when the ring network fails. The system automatically switches the link to ensure reliable and safe data transmission, and the false transmission rate is greatly reduced.
3 Economic Benefits and Prospects Analysis of Industrial Ethernet for Coal Mines 31 The use of industrial Ethernet systems saves a lot of transmission lines and maintenance costs. In the future, new industrial TV and audio communication will not require every camera. The communication line is laid down from the ground to the underground, which saves a lot of material cost and installation and maintenance costs.
32 Social security benefits The industrial Ethernet system is used, and various information systems of the live situation are effectively integrated to realize all kinds of information communication and sharing in the mine. Each automation subsystem implements overall management and control, so that information resources and equipment resources can be fully shared, and Feng has a good promotion prospect.
33 foreground analysis system realizes the command and management level of data acquisition, production scheduling and decision making in the whole mine.
Due to the information sharing of various automation systems, the emergency plan developed by the boundary system ensures the linkage of each system and the comprehensive utilization of information in the event of an emergency, which provides a reliable basis for leadership decision-making.
In the coal mining industry, the application of Gigabit Industrial Ethernet and Gigabit switches down the well has set a precedent for coal mines and accumulated rich experience for the informatization of coal mine informationization. This will bring about earth-shaking changes in China's coal industry.
4 conclusion! Machine technology and letter. The increasing perfection of the system provides favorable conditions for the automation of the coal mining industry. Mine automation has become a hot topic with low cost. Significant advantages such as large returns. The wide application of this system in coal production not only reduces the labor intensity of the operators, but also greatly improves the production level of the coal mines and creates enormous economic and social benefits. However, with the rapid development of microelectronics computer technology software technology sensor technology and 1 dynamic technology.
The industrial Ethernet system needs to be improved and improved, and it is constantly reforming and innovating in terms of intelligent automation and quickening, contributing to the development of the coal industry.
13 Finance from the knowledge of 06, the manual, Beijing, Siemens China, 2, 4 2 Guo Wei, Liu Xiaoling. Application of computer in mineral processing automation, Silicon Valley, 203 Nie Guanghua, Lin Herong. The status quo and development prospects of process control in the concentrator. Minerals comprehensive 4 阮 Dong Ru, Xie Dongguang. The choice of switching technology in the industrial Ethernet architecture. National Advanced Manufacturing Technology Forum and Manufacturing Automation Information Technology Seminar
Oil filter belongs to pipeline coarse filter series, can also be used for gas or other medium large particles filter, installed in the pipeline can remove the larger solid impurities in the fluid, so that the machine equipment (including compressor, pump, etc.), instrument can work and operate normally, to stabilize the process, ensure the role of safe production. Basket filter main filter materials are stainless steel porous plate, stainless steel braided mesh and stainless steel sintered mesh. The oil filter can be customized according to customer's specific requirements (special pressure, special caliber). Basket filter has the advantages of large pollution absorption, high pressure resistance, easy installation and cleaning.
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