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introduction：Utility boiler@、The role of the heat exchanger of the smoke exhaust heat of the industrial furnace or other power metallurgical chemical and other devices to preheat the combustion air is:①Reduce the exhaust temperature of boilers and other equipment,Improve thermal efficiency;②Raise the temperature of the air used for combustion，Make the fuel easy to catch fire、Combustion stability and improved combustion efficiency。 The air preheater mainly has tube type according to different structure、Plate and rotary3class（See table[Types and main characteristics of air preheater]）In the vertical tubular air preheater(figure1[Vertical tubular air preheater])In the,Smoke generally passes through the pipe from top to bottom，Heat is continuously transferred to air flowing laterally through the tube
2015-05-10 Reading quantity 2804
introduction： Impact forklift 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。]For many rotating machinery products, their service life depends on the life of the bearing components in the key parts of the product。 “maintenance-free”Bearing is notIKObearing[IKObearing:IKONeedle roller bearing to
2015-05-10 Reading quantity 1567
introduction：rightFAGbearing[FAGbearing:The main shaft bearing is made of a solid inner ring、Outer ring、The ball、And a single row angular contact ball bearing consisting of a cage assembly with a solid window cage。]Regular maintenance of equipment、Bearings removed during operation and replacement of peripheral parts are inspected，Need to judge in turn whether the second bearing parts can be used again and record the use of better than worse。Also carefully investigate and record the removed bearing and appearance。To determine and investigate the remaining amount of lubricant，After sampling，Clean the bearings well。 Secondly, check the raceway surface of the bearing，Rolling surface and matching surface condition and protection
2015-05-10 Reading quantity 1551
introduction： Maintain the bearing well[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。]isKOYObearing[KOYObearing:kOYOBearings are generally required to bear large loads，Often without a cage，Instead, fill the inner and outer raceways with rolling elements。And most small and medium-sizedKOYORolling bearings are all with protection
2015-05-10 Reading quantity 1556
introduction： 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。]As a precision mechanical part，In the handling process must ensure that the bearing packaging is intact，Handle it gently，The stacking height of commercial bearings is less than one meter，No collision of any kind is allowed、strike、And savage move。 The bearing storage place shall be clean、desiccation、ventilate，
2015-05-10 Reading quantity 1471
introduction：[Abstract]Several mechanism forms and functions commonly used in powder metallurgy die design are introduced，The application and principle of the relevant mechanism are described briefly。 keyword Powder metallurgy tools institution core-pulling Slide block oblique wedge Powder metallurgy die(Powder mold for short)Due to the requirement of charging ratio and uniformity of structure and density of compact parts，So in addition to the mold cavity design，In the overall mold and mold frame design，It will inevitably be used in mechanical design or mold design，They are molded with presses and molds、The connecting pieces are combined，Meet the molding requirements of powder metallurgy die。 1
2015-05-10 Reading quantity 2871
introduction：Scraping device with mechanical stirring(rotor)Agitate the liquid in the device，Scrape and renew the liquid boundary layer on the heat transfer surface（Liquid film）Heat exchangers to enhance heat transfer。figure[Structure of scraper heat exchanger]It is a typical structure of scraper heat exchanger，It consists of a shell and a rotor。The shell is composed of an inner cylinder and an outer cylinder。The inner cylinder is the heat transfer cylinder,The barrel passes through the material to be treated（Afluid）；The outer cylinder is a jacket,Inside the jacket through a heat transfer medium（Bfluid）。The rotor turns while working。The outer edge of the rotor has a scraper，It plays the role of agitation and scraping film。The speed of the rotor is generally100～800turn／points，Depending on the viscosity of the material and the diameter of the equipment
2015-05-10 Reading quantity 2812
introduction：one、SKFImported bearing[Imported bearing:Simply put, the import bearing agent refers to the sale of an imported bearing brand。The main brands of imported bearings arenskbearing，ikobearing，fagbearing，Of good quality，Of course, the price is not cheap。]Installation of： SKFImported bearing[Imported bearing:Simply put, the import bearing agent refers to the sale of an imported bearing brand。The main brands of imported bearings arenskbearing，ikobearing，fagbearing，Of good quality，Of course, the price is not cheap。]The installation must be dry、Carried out under clean environmental conditions。The shaft and shaft should be carefully checked before installation
2015-05-10 Reading quantity 1553
introduction： The method of heating the containment to the required temperature shall be in accordance with the field conditions、Dimensions of the heated part、Quantity and requirements are selected。 General heating methods are：Solid fuel heating，Hot dip heating，oxygen-Acetylene flame heating、Burner heating、Electric heating。If conditions permit，Available in special furnace(Such as flame heating furnace and salt bath furnace、Resistance furnace and other electric heating furnace)Internal heating。When the site conditions do not allow，A simple stove can be built，Use firewood、Solid fuels such as coke，Heat up。If conditions permit，Gas also available、The liquid fuel is sprayed。 Hot dip heating is usually only used for smaller couplings(
2015-05-10 Reading quantity 1444
introduction： Bearing on bottom cover of generator[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。]After damage，It is difficult to remove without proper tools。At this moment，The bottom cover of the generator can be placed upside down on the work table，Cushion with soft wood or cloth，Add a good amount of butter to the bearing of the bottom cover，Cut some scraps and shove them between the bottom cover of the bearing。open
2015-05-10 Reading quantity 1473
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