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introduction： 1. In order to further strengthen the management of large equipment reducer，Reduce oil leakage of the reducer，Ensure safe operation of large equipment，On the basis of《Coal mine safety code》、《Standard for mechanical and electrical equipment maintenance in coal mines》、《Standard for sound condition of mechanical and electrical equipment in coal mines》,In execution《Datong Coal mine Group company mine large equipment safety management provisions》Based on，AD hoc plan《Large equipment reducer management measures》，Hope that all units earnestly implement and comply with the implementation。 1、Scope of application This management method is applicable to the maintenance of large equipment gear reducer in coal mine。 2
2015-02-08 Reading quantity 2813
introduction：A part of a gas turbine that converts the energy of high-temperature and high-pressure gas into mechanical work，Also known as gas turbine。The gas turbine can also be used in other installations as a device that uses high temperature pressure gas to do work。 Gas turbine generally adopts axial flow,Only in small gas flow(Such as100In gas turbines below kilowatts)The centripetal type is often used。Axial flow gas turbine is mainly composed of stator and rotor。The stator is equipped with a stator blade，The rotor is equipped with a moving blade（See turbine blade）。The expansion of the blade from the combustion chamber of the gas turbine is accelerated and flows into the moving blade，A force on the moving blade causes the rotor to rotate，Turn the energy of the gas
2015-02-08 Reading quantity 2801
introduction： Procurement principles of process equipment Process equipment is the carrier to realize the determined product production process plan，Its purchasing principle is to order on the basis of merit，Equal priority。 “Preferential ordering”It is to take quality as the guarantee premise，Simultaneous requirement“fast”、o“province””。 “fast”The shortest possible delivery(Supply of goods)period；“province”That is, the relative most economical amount of investment。 “Equal priority”It is in the procurement of process equipment，Focus on“entrance”with“Made in China”A problem of...，Shall also“preferential”As the premise，In technology、Price and other basic conditions are large
2015-02-08 Reading quantity 2807
introduction：1.bearing[bearing:bearing（“Bearing”，Japanese person“Axial receptor”）It is a part that holds and reduces the friction coefficient of load during mechanical transmission。Can also be said，When other parts move relative to each other on the shaft，A device used to reduce the coefficient of friction during power transmission and to keep the center of the shaft fixed。]The oil bath is smooth，Oil bath smoothing is a common smoothing method in bearings，Low fit、Smooth medium speed bearing。Partially dip the bearing in the groove，The smooth oil is carried by a rotating turbocharged bearing part，Then flow back to the tank oil level should be slightly below the center of the lowest moving body。 2.shaft
2015-02-07 Reading quantity 1460
introduction： ug Default metric ugii_env.datInside set。 UGII_DEFAULTS_FILE=${UGII_BASE_DIR}ugiiug_metric.def ugChange unit 1. Its just that the units change and the actual length stays the same. a. Unigraphics NX->UG Command Prompt b. Cd UGII c. Ug_convert_part -in
2015-02-07 Reading quantity 2807
introduction：In useSKFbearing[SKFbearing:SKFThe full name is“Svenska Kullager-Fabriken”The Chinese transliterated name is“SKF”；SKFThe group is headquartered in Gothenburg, Sweden，Is a leader in bearing technology and manufacturing。SKFBearings can be divided into sliding according to different specific structures and similarities and differences in working propertiesSKFBearing and rollingSKFbearing]when，We must first check the appearance of imported bearings，To determine whether it meets the standards we require。Let me share with you the parts that we should check。 SKFbearing[SK
2015-02-07 Reading quantity 1489
introduction： The use of electric forklift power supply The power supply used is divided into power frequency transformers（Iron core，50Hz）The linear power supply and the use of high-frequency transformers（Magnetic core，Thousands ofHz）The switching power supply two categories。 The principle of switching power supply is：Put the power frequency first（50Hz）The alternating current is converted to high frequency current，Then through the high-frequency transformer into low voltage after the rectifier output low voltage DC。Because the volume of the high-frequency transformer with the same power is much smaller than the power frequency----The higher the frequency，Smaller size，So you can do a lot of power、Small size、
2015-02-07 Reading quantity 2968
introduction： The longitudinal flow of fluid as it fills a pipe，Pipe flow for short。Tube flow is one of the main research contents of viscous incompressible fluid dynamics。Pipe flow problems usually required to be solved in engineering，How much power is used to make the required fluid flow continuously through the given diameter of the pipe；In other words, it is required to calculate the total head loss of pipeline flowΔ,Calculate volume flow and economical pipe hydraulic diameter。 Steady tube flow for viscous incompressible fluids，The following energy equation is commonly used for analysis [0252-01]Formula middle and lower corner mark1、2Represents the progress of the accounting pipe section、exit，The items in parentheses represent hydrostatic head in turn
2015-02-07 Reading quantity 2835
introduction：A magnetic analytical instrument that uses differences in the atomic properties of different elements to analyze substances。This instrument is widely used to determine the structure of compounds﹐Quantitative analysis and zoological research。It is related to ultraviolet﹑infrared﹑Mass spectrometry and elemental analysis﹐It is an important tool for the study and determination of organic and inorganic compounds。In addition to its charge and mass﹐More than half of all elements have nuclei that can spin。Because the nucleus is a positively charged particle﹐It spins and creates a small magnetic field。Nuclei with spin are in a uniform, fixed magnetic field﹐Theyre going to interact﹐The result is that the spin axis of the atomic nucleus is along
2015-02-07 Reading quantity 2900
introduction：A mechanical transmission that uses the mesh of the chain and the teeth of the sprocket to transmit power and motion(figure1[Toothed chain drive])。The average transmission ratio of chain drive is accurate,High transmission efficiency，The distance between axes has a large adaptive range，Can be higher at temperature、Use in environments with high humidity；But the chain drive can only be used as a parallel shaft drive，And its instantaneous transmission ratio fluctuates，High transmission noise。 Chain drive has been used in the armillary sphere invented by Zhang Heng in the Eastern Han Dynasty of China。Ever since1874Since the worlds first bicycle with a chain drive，Chain drive is widely used。The power of chain drive can reach3600kilowatt，Chain speed is up to speed40meter／
2015-02-07 Reading quantity 2806
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