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introduction： 1 Plain 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。]And rolling 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，Used to reduce power transmission
2014-12-28 Reading quantity 1430
introduction：Regular maintenance of machinery and equipment，It is very important to ensure production。As a precision part of mechanical equipment，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。]Regular inspections are especially critical。Today we will introduce the necessity and key steps of regular bearing inspection。 It is important to keep bearings and lubrication clean Clean the surface of the machine before inspection，Then disassembleSkfImported bearing[Imported bearing
2014-12-28 Reading quantity 1434
introduction：1、Comply with casting equipment general operating procedures 2、pre-work，Carry out no-load test，Check the piping system for air leakage。Just make sure everythings okay，Before production can proceed。 3、Working hours，First, the casting is hoisted to the equipment with an air hoist and clamped，Then start the felling，Impact casting。At impact，unhook。 4、During core drop，Do not drop the core on the belt conveyor in the basement。 5、In the process of lifting castings，Do not collide with equipment and bag doors。 6、During work，Do not operate two valves at the same time。
2014-12-28 Reading quantity 2770
introduction：The selection of planetary cycloidal pinwheel reducer must first clarify the reduction ratio The reducer is a power transmission mechanism，Speed converters using gears，electrifyBWDouble-axis cycloidal pinwheel reducer with horizontal foot plate（motor）The number of turns slows down to the desired number of turns，And get a larger torque mechanism。In the mechanism currently used to transmit power and motion，The application range of planetary cycloidal pinwheel reducer is quite wide。It can be seen in almost all kinds of mechanical transmission systems，Ships from vehicles、CARS、locomotive，Heavy machinery used in construction，Industrial grinding equipment for machinery industry such as Raymond mill、
2014-12-28 Reading quantity 2780
introduction：The carbon content of tempered steel is between0.27～0.50％among。Commonly used carbon tempered steel，Its carbon content is close to the upper limit，Such as40、45、50Steel etc.；The alloy tempered steel is closer to the lower limit，Such as40Cr，30CrMnTiSteel etc.。 Alloy tempered steel containsCr、Ni、Mn、TiSuch alloy elements，Its main function is to improve the hardenability of steel，The tempered sorbite structure was strengthened after tempering。The content of alloying elements in the tempered steel can strengthen the ferrite without significantly reducing its toughness，Some even improve their toughness at the same time。In tempered steelMo、V、Al、
2014-12-28 Reading quantity 1435
introduction： Steam turbine is also called turbine turbine，Including steam turbines and gas turbines，It is a rotary thermal power machine with steam or gas as its working medium，It has a large single-machine power、Higher efficiency、Smooth operation and long service life。The main use of steam turbines is as prime movers for power generation，Its electricity generation accounts for about the total electricity generation80%around。Steam turbines operate at variable speeds，It can be used to drive various pumps directly、Air blower、Compressors and ship propellers，Therefore, the steam turbine can be divided into power station steam turbine according to its use，Industrial steam turbine、Marine steam turbine。The steam turbine must be combined with the steam generator(Boiler)，Driving machine
2014-12-28 Reading quantity 1477
introduction：Precision parts or accessories，E.g. 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。]Such as due to inventory conditions or improper rust prevention will produce rust，Basically can not be processed by mechanical methods，The use of chemical pickling will damage the accuracy of parts。It is always difficult to repair the corrosion of precision parts，Colleen306The invention of... completely solved the problem。Colleen306
2014-12-28 Reading quantity 1445
introduction： 1.High speed 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 fit and clearance due to high speed bearings[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，
2014-12-28 Reading quantity 1428
introduction： 1、OHardness of the ring OThe hardness of the ring material is the most important index to evaluate the sealing performance。OThe hardness of the ring dependsOThe compression amount of the ring and the maximum allowable extrusion clearance of the groove。Due to ShawA70The nitrile seals can meet most conditions of use，Therefore, if the sealing material is not specified，Generally offered by ShawA70Nitrile butadiene rubber。 2、Extrusion clearance Maximum permissible extrusion clearancegmaxAnd system pressure，OThe diameter of the ring section is related to the hardness of the material。usual，The higher the work pressure，Maximum permissible extrusion clearancegma
2014-12-28 Reading quantity 1439
introduction： This paper mainly introduces the design idea of sales information management system，From the function application analysis and the page structure of each application module are explained in detail。At the same time, the establishment method of database table is given，And a diagram of the relationship between the tables。 [keyword]Relationships between topological functional architecture tables System Overview The topology of the sales information management system is shown in the figure1As indicated: （figure1Sales information management system topology） It can be seen from the figure above that there are three types of system related personnel: salesman
2014-12-28 Reading quantity 2774
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