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introduction：A flat connecting rod mechanism that uses a crank and a slider to rotate and move each other，Also known as crank linkage mechanism。In the crank slider mechanism, the member constituting the moving pair with the frame is a slider，Through turning pairA、BThe member connecting the crank and the slider is a connecting rod（figure1 [Crank slider mechanism schematic]）。When the mechanism moves，Hinge center BThe trajectory of the crank does not pass through the center of rotationO，It is called an offset crank slider mechanism(figure1a[Crank slider mechanism schematic])，Where is the offset。Such as taking different components for the frame,A rotating guide bar mechanism can also be obtained（figure1b[Crank slider mechanism schematic]）、Crank block mechanism（figure1
2015-02-18 Reading quantity 2797
introduction： Serial number Variety name And standard number Specification range Product grade Thread tolerance machine
2015-02-18 Reading quantity 2917
introduction：Surface fatigue wear Due to cyclic contact stress﹐A wear in which cracks form and spread inside the working surface or surface of the friction pair, causing the surface material to peel off。Contact sports include rolling﹑Slide or scroll plus slide 3Such situation。Surface fatigue wear often occurs in rolling 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。]﹑Gear and steel
2015-02-18 Reading quantity 2790
introduction： one、The characteristics of mining machinery are：Mines are usually divided into underground mining and open pit mining。 1）Because mine space is limited，The mechanism of mining machinery is required to be compact，Small size，Radial 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 pressure and load on the gears are large； 2）Mining machinery to be able to
2015-02-18 Reading quantity 2797
introduction： 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。]（Especially rolling bearings）There are two kinds of structures: strip cage and no cage。Medium largeSKFImported 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，
2015-02-17 Reading quantity 1447
introduction： A special machining that combines electrolysis with mechanical grinding﹐Also known as electrochemical grinding﹐English abbreviationECG。Electrolytic grinding yes20century50It was invented by Americans in the early 1900s。figure The picture shows the principle of electrolytic grinding。The workpiece is connected to the positive electrode of the DC power supply as an anode﹔The conductive grinding wheel is connected to the negative electrode of the DC power supply as the cathode。When grinding﹐Maintain a certain grinding pressure between the two﹐The non-conductive abrasives protruding from the surface of the grinding wheel make the workpiece surface conductive to the substrate of the grinding wheel
2015-02-17 Reading quantity 2788
introduction： Fuel atomization in diesel injection system﹐And distributed in the combustion chamber to mix with air components。It is mainly composed of an oil injector and an oil injector body。Its installation position and Angle on the cylinder head depend on the design of the combustion chamber。The spray characteristics of the injector include atomization particle size﹑Oil mist distribution﹑Beam direction﹑Range and diffusion cone Angle, etc。These characteristics should meet the requirements of diesel engine combustion system﹐To perfect the mixture formation and combustion﹐And obtain higher power and thermal efficiency。Fuel injectors are divided into two types: open and closed。The structure of the open injector is simple﹐But poor atomization﹐Rarely adopted。Closed fuel injectors are widely used in various diesel engines
2015-02-17 Reading quantity 2793
introduction： PLC （1）From switching quantity control to sequence control、Shipping processing，Its from the bottom up。 （2）continuousPIDControl and other functions，PIDIn the interrupt station。 （3）One availablePCMachine master station，Multiple sets of the same typePLCAs slave station。 （4）Also onePLCMaster station，Multiple sets of the same typePLCAs slave station，constitutePLCnetwork。This is better than...PCThe convenience of being a master station is：When there is user programming，You dont have to know the communication protocol，Just follow the instructions。 （5）PLCThe grid can be either independentDCS，Can also be used asD
2015-02-17 Reading quantity 2873
introduction：In the planar linkage mechanism﹐If the rocker or slider is the active part﹐When the other two moving members are in the same straight line position﹐No matter how much driving force﹐Cant get the mechanism started。As in the crank rocker mechanism(figure1 Dead center of the crank and rocker mechanism )In the﹐When the rocker is active and the crank is in two limit positions in line with the connecting rod(DC 1B 1A andDC 2B 2A)when﹐The force transmitted by the connecting rod to the crank cannot produce a moment to turn the crank。Slider mechanism in crank(figure2 Dead center of the crank slider mechanism )In the﹐There are also two dead spots when the slider is active(CBA andC 1
2015-02-17 Reading quantity 2885
introduction：Recently learned from the China General Machinery Industry Association reducer branch，With the further increase of national infrastructure construction，In recent years, Chinas reducer industry has developed rapidly。According to the statistics of the speed reducer branch，Last year，The whole industry produces reducer45Ten thousand units，Realize sales revenue20Hundred million yuan，Export treaty1Hundreds of millions of dollars。Expert prediction，“The 11th Five-Year Plan”period，Due to the development of the countrys overall economy，The growth rate of the total economic volume of the reducer industry will still reach double digits。 The development of reducer in our country has been recent40History of the year，It is widely used in the national economy and national defense industry
2015-02-17 Reading quantity 2755
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