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introduction： one、Poor lubrication( Account for about50％) According to a survey，Poor lubrication is caused by 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，A device used to reduce the coefficient of friction during power transmission and to keep the center of the shaft fixed。]One of the main causes of premature damage。The main reasons include：Failure to fill lubricant or lubricating oil in time；lubricant
2015-01-08 Reading quantity 1471
introduction：First-generation product：Activated carbon water purifier。Water purification device with activated carbon as the core，The adsorption capacity of activated carbon is utilized to purify water source，Large particles of impurities on water、Heavy metal、Organic matter、Residual chlorine and other substances have a certain removal ability，It is the first water purifier to enter the home。The mineral pot that arose ten years ago is a representative product of this type of water purifier。Activated carbon water purifier is greatly affected by water source，Such as raw water quality is poor，The practical effectiveness of such water purifiers will also be diminished。 Second generation product：ultrafiltration（Hollow fibre）Water purifier。This type of water purifier uses hollow fiber ultrafiltration membrane，It can effectively remove bacteria from the water、Oita
2015-01-08 Reading quantity 2899
introduction：Shear thinning of plastic melt The plastic melt is a non-Newtonian fluid，A processability closely related to injection molding is the shear thinning of plastic melt，The viscosity of the fluid does not change with the shear rate，This fluid is called a Newtonian fluid，Like water、gas、A liquid or solution of low molecular weight compounds is a typical Newtonian fluid，If the viscosity of the fluid depends on its shear rate，Such fluids are non-Newtonian fluids，Most plastic melts behave as non-Newtonian fluids。There are also many types of non-Newtonian fluids，The characteristics of plastics in the molten state are shown in the figure4In the coordinates of，It shows that a shear stress rises rapidly first and then
2015-01-08 Reading quantity 2882
introduction：Age hardening：The phenomenon that the consistency of grease increases with storage time。 appearance：Only the grease characteristics seen by the visual inspection method are used，Usually includes the overall appearance、texture、Color and gloss, etc。 Overall appearance：smooth、coarse、grainy、Dividing oil, etc。 texture：creamy、elastic、brushed。 colour：red、blue、yellow、White scale，Limiting adjectives can also be added“light”“intermediate”“deep”Etc.。 gloss：lustrous、Dull, etc。 consistency：Consistency is the degree to which a plastic material resists deformation under external force。 cone
2015-01-08 Reading quantity 1459
introduction：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，A device used to reduce the coefficient of friction during power transmission and to keep the center of the shaft fixed。]Is a standard part，In mechanical design，It is required that the rolling bearing can be correctly selected。First choose the type of bearing；And then depending on the working conditions、Use requirements and bearing characteristics for corresponding calculations，And select the appropriate model from the relevant national standard。 When selecting the type of bearing，Should consider
2015-01-08 Reading quantity 1450
introduction：There is a strong metal noise、Abnormal sound、Irregular sounds indicate anomalies。The cause is poor lubrication、Shaft or 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。]Poor seat accuracy、Bearing damage、Foreign body intrusion。NSKThe rotation sound of angular contact ball bearings is checked by stethoscope, etc。 Many users have this problemNSKAngular contact ball shaft
2015-01-08 Reading quantity 1506
introduction： At present, there are two types of agitators used in the laboratory：Electric stirrer and magnetic stirrer。among，The magnetic stirrer is suitable for mixing dilute liquids here，This paper briefly introduces several problems that should be paid attention to in the use of magnetic stirrer： first、On the first use，Check whether the accessories with the instrument are complete by referring to the instrument instructions first，Mixer, for example、Power cord； second、Speed regulation should be gradually adjusted from low speed to high speed，Its best not to start in high gear，To keep the mixers out of sync，jitter； third、unstirred
2015-01-08 Reading quantity 2795
introduction：measureINAbearing[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 outer ring value is the clearance when the roller is sagging。First, ensure that the bearings upright attitude rotates the outer ring left and right1/2-1circle，2The position where any roller in a column is directly below each other。Use a gauge to measure the clearance，Site basis INA Bearing outer ring outer diameter
2015-01-08 Reading quantity 1454
introduction：When setting up the control system， System integrators invariably want to achieve more with fewer devices。They need control systems that can handle more than just numbersI/OSum movement，Visual functions and modular instruments for automated monitoring and testing can also be integrated。In addition，The control system must also be able to process control algorithms and analysis tasks in real time and transmit data back to the enterprise。Market research companyARCFirst adopted by consulting agenciesPACThis term，It defines a new type of controller，The controller combinesPCProcessor of、RAMAnd the advantages of software，andPLCInherent may
2015-01-08 Reading quantity 2883
introduction：A conveyor that uses a scraper attached to a traction chain to scrape loose material in an open chute。It consists of an open chute、Drag chain、strickle、The head drive sprocket and the tail tensioning sprocket are composed。Traction chain around the head、The tail sprocket forms a closed loop。Materials can be transported in either upper or lower branches，Also available on、The next two branches are transported simultaneously。Traction chain multi-ring chain。A traction chain can be attached to the middle of the scraper，Two traction chains can also be used to connect the two ends of the scraper（See picture[The structure of the scraper conveyor]）。The shape of the scraper is trapezoid、Rectangular or long。There are two types of scraper conveyors: fixed type and displacement type。Transfer type scraper
2015-01-08 Reading quantity 2777
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