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introduction：one Locking part Mainly hex screws and countersunk holes。Among them, screws are divided into metric and imperial systems，The interdental angles are respectively60`with55`。 Writing style： Metric system Screw large diameter*pitch British system Outer diameter dimension—1Number of screws in inches Screws and countersunk holes are fitted with large gaps,Commonly used countersunk hole sizes are as follows： specification Countersunk hole diameter Countersunk hole depth Through-hole diameter M2 4.5 3.0 2.5 M3 6.0 3.5 3.5 M4 7.5 4.5 4.5 M5 9.0 5.5 5.5 M
2015-02-17 Reading quantity 2893
introduction： Along with our country reform and opening policy progress deepening，Continuous improvement of the market economic system，For domestic pharmaceutical companies "GMP" And the demands are intensifying。matchmaker "GMP" demand，Not only includes hardware such as civil engineering、fitment、Process layout、Production equipment、surroundings，Also includes software such as process manuals，Production management procedures, etc。For pharmaceutical companies、The design institute focuses on the overall layout，Workshop layout as far as possible to avoid human logistics crossing，The rationality of decoration material selection，And the rationality of process production equipment selection。Here we focus on the selection of process equipment in the design of pharmaceutical factories，Alignment control
2015-02-17 Reading quantity 2866
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。]Installation of： Imported 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 in
2015-02-17 Reading quantity 1441
introduction：summarize： This machine combines the advantages of pneumatic conveying and conduction heating technology;Using air or inert gas as the transport medium;A film of material that spirals along the inner wall of a jacket;Constant heat gain;Thus in3~5Seconds short time to achieve the purpose of instant drying. The heat transfer coefficient of this machine is large(170~500w/m2k),Low energy consumption(1.3~2.0kgH2O),Compact structure,Lack of ancillary equipment,Small occupation of land,Compared to air drying,Equipment and operating costs can be saved50%.,For pneumatic conveying water-containing or solvent-containing powder granules(3um~3mm)Material can be continuous
2015-02-17 Reading quantity 2792
introduction：This example mainly analyzes the natural vibration characteristics of turbine blades，The effect of damping is ignored，Therefore, it is the analysis and study of the undamped free vibration system。 Turbine blade is one of the most important parts in gas turbine，At high temperatures and pressures，Withstand centrifugal and air forces,And vibration、corrosion、Oxidation isoaction，The working conditions were terrible，Therefore, blade failure often occurs，Accounts for about half of gas turbine accidents40％above ，The resulting losses also tend to account for about half of the cost of gas turbine accidents。In that sense，The performance of a gas turbine depends on whether the blade design is reasonable or not。At present，pass
2015-02-17 Reading quantity 2891
introduction：The main causes of rust are as follows： 1、Some enterprises are producingSKFbearing[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]The process is not strictly in accordance with the cleaning anti-rust regulations and the requirements of the oil seal anti-rust packaging during the processingSKFbearing[SKFbearing:S
2015-02-17 Reading quantity 1442
introduction：Magnetic fluid seal Semi-fluid dynamic sealing of leakage channel with ferrofluid(See picture Magnetic fluid seal diagram )。Fe3O4‧CrO2Ferromagnetic ultrafine particles are suspended in a low-volatility liquid﹐Forming a ferrofluid。Place the ferrofluid in the seal gap﹐Ferrofluid can form strong liquid film under the action of magnetic field force﹐To stop the leak。Magnetic fluid seals are often used to seal gases﹐Suitable for sealing high vacuum systems。It can be used at high speeds﹐But not resistant to high temperature and pressure。
2015-02-17 Reading quantity 2870
introduction： *There is a contact Angle between the ring and the ball，The standard contact Angle is15°、30°and40° *The greater the contact Angle, the greater the axial load capacity *The smaller the contact Angle, the better the high-speed rotation *Single row 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。]It can withstand radial load and unidirectional axial load *
2015-02-17 Reading quantity 1550
introduction：Resulting cylindrical roller 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。]There are many reasons for early wear and tear，In summary, there are five aspects as follows。 ①The structure design is not reasonable Includes errors in design calculations；Structural design、dimension、Improper precision；TIMEKNBearing alloy、Coating material and bearing backing material、oiling
2015-02-17 Reading quantity 1538
introduction： With the increasing development of modern industry，The performance requirements of products are higher。As forging，The quality control and inspection in the forging process have also taken strict measures，This is necessary to prevent forging defects and improve the quality of forging。The reasons for forging quality problems are complex，It determines the diversification of analytical methods；And the importance of forging in mechanical products，It also determines the high standard and strict requirements for forging metallurgical quality。In particular, defects in some forgings may lead to deterioration of material properties，Its of metallurgical quality“Internal disease”，Hidden dangers run deep.，Great harm，So in the control of forging metallurgical quality
2015-02-17 Reading quantity 1565
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