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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。]Vibration of SKFbearing[SKFbearing:SKFThe full name is“Svenska Kullager-Fabriken”The Chinese transliterated name is“SKF”；SKFThe group is headquartered in Gothenburg, Sweden，Is the leader of bearing technology and manufacturing
2015-04-07 Reading quantity 1561
introduction： Preloading methods are divided into radial preloading method and axial preloading method，It is described as follows。 1、Radial preload method： The radial jacking method is mostly used in tapered bore bearings bearing radial loads[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。]In the，A typical example is a double row precision short cylindrical roller bearing，Use shell
2015-04-07 Reading quantity 1669
introduction：Due to axle diameter and 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 size measurement of the seat hole is not accurate or the roughness of the mating surface does not meet the standard requirements，Resulting in excessive interference fit，The plastic sliding bearing ring is greatly squeezed，Thus, the radial clearance of the bearing itself is reduced，Make the bearing difficult to rotate、fever，Increased wear or stuck，seriousness
2015-04-07 Reading quantity 1539
introduction：1、Small machines can be turned by hand，To make sure the rotation is smooth。Check items for foreign bodies、scar、Poor operation due to indentation，Due to poor installation，The torque caused by poor machining of the mounting seat is unstable，Because the clearance is too small、Installation error、Seal friction caused by excessive torque and so on。Power operation can begin if there is no anomaly。 2、Large machinery cannot be rotated manually，So cut off the power immediately after the no-load start，Mechanical idling，Check for vibration、noise、Whether the rotating parts are in contact, etc，After confirming that there are no anomalies，Enter power。Power operation，Start at low speed with no load，Slowly rise to the top
2015-04-07 Reading quantity 1697
introduction： Floating ring seal A non-contact dynamic seal that limits fluid leakage by minimal clearance between a floating metal ring and a shaft or housing(See picture Floating ring seal )。The floating ring can float freely in the shell﹐Therefore, when the shaft rotates at high speed and produces vibration, the effect on the seal is small﹐rub﹑Minimal wear。Floating ring seal is a high speed seal﹐Can be used to seal gases and liquids。Sealing gas time﹐The floating ring device should be filled with lubricating oil﹐Facilitate sealing and lubrication。
2015-04-07 Reading quantity 2857
introduction：one、Technological development process To high value-added resource management as the goal，Alkali recovery white mud to prepare light calcium carbonate technology as early as 20 years ago in China began to explore，In the 1980s, Yuanjiang, Hunan Province, took the lead in testing green liquor purification and carbonation technology to recover white mud and prepare filler calcium carbonate，However, the problems such as uneven particle size and flocculent structure of white mud can not be overcome，Finally, the recovery rate of white mud sifting can only reach10The level of，It is also affected by the microstructure of white mud，The phenomenon of losing powder and hair in printing after copying paper sometimes occurs；Improved lime pretreatment and secondary causticization technology in Yueyang, Hunan Province in 1990s，Mainly for improvement
2015-04-07 Reading quantity 2943
introduction：Threaded fasteners in the manufacturing process，Example tempering（quench＋High temperature tempering）、cyaniding、carburizing、Electrochemical cleaning、phosphating、electroplate、Rolling and machining（Burnt by improper lubrication）Scheduling process，Or in a service environment，Due to cathodic protection reaction or corrosion reaction，Hydrogen atoms may enter the matrix of steel or other metals，And remain in the matrix，In a state of stress below the yield strength，It may result in a reduction or loss of extensibility or carrying capacity、crack（Its usually submicroscopic），Sudden rupture occurs during service or storage，Cause serious brittle failure。Thread fastening
2015-04-07 Reading quantity 1597
introduction：Antirust property For 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 grease inside must have anti-rust effect，Rust inhibitor preferably insoluble in water。The grease should have good adhesion to form an oil film on the surface of the steel，Even if the grease is filled with water, it can be maintained。 Mechanical stability Grease softens during machining，guide
2015-04-07 Reading quantity 1589
introduction： 601 GB/T 9074.8-1988 Cross recessed small disc head screw and spring washer and flat washer assembly Cross recessed small pan head screw,single coil spring lock washer and plain washer assemblies 602 GB/T 9074.9-1988 Cross recessed countersunk head screw and conical lock washer assembly Cross recessed coun
2015-04-07 Reading quantity 2924
introduction：For measuring sheet、strip、Tube material、sheet、Instruments for measuring mechanical quantities of coating and plating thickness。Commonly used thickness gauges are nuclear radiation thickness gauges、X Gamma ray thickness gauge、High frequency eddy current thickness gauge、Microwave thickness gauge and roller contact inductance thickness gauge。 Nuclear radiation thickness gauges are divided into two categories。One is utilizationβ、γThe thickness is measured by the intensity change caused by the absorption of isonuclear radiation when it penetrates the material under test；The other is the use of nuclear radiation backscattering principle,Radiation scatters as it passes through matter,When the scattering Angle exceeds90°Then backscattering occurs，while
2015-04-07 Reading quantity 2821
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