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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。]Internal clearance before installation（Primary gap）Angular contact ball bearing with operating temperature after installation[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 the other parts are
第十四单元 1.常考单词： devicecompassiongrabbelongingthreatening convincefosterpersuasionavailsuspect profoundtoconvincesb.todosth.tocommenton 2.常考句子： 1）ItwasamicrocassettefoundinKathleenWeinstein's
【Abstract】Introduced the use ofRPThe rapidity of the technology and the maturity of the casting process make functional productsCAESystem，The factors affecting the precision of the product are analyzed，The accuracy of three main forming stages is analyzed by nonlinear finite element method，Adopt pattern recognition theory、Error theory、Neural network method deals with error feedback problem，Error compensation correction and machining accuracy prediction are carried out，Methods to improve the quality of the final product。 keyword：Rapid prototyping；CAE；RT;feedback 1、before said Rapid prototyping（Rapid Prototyp
Guo Jiwei For a long time，The malt barley used in beer brewing in China mainly relies on imports，We now import more barley for brewing beer every year200Ten thousand tons。The import of malted barley is affected by the international market，Large price fluctuation，It often has a very negative impact on domestic beer producers，Resulting in increased costs of imported raw materials，Affect the economic benefits of enterprises。For this situation，Now some domestic beer manufacturers by adjusting the technical process，The original malt dosage is generally accounted for70%，Rice consumption ratio30%Change the proportion of the formula to malt dosage25%、For other raw materials like rice and barley
The operation of electric forklift trucks 1、It has a joystick。For fitted with a cargo press、Electric forklift with grippers and other accessories，The distributing valve is equipped with a corresponding accessory control lever。While manipulating these joysticks，Be gentle，Especially after the fixture touches the cargo，More attention should be paid to the amount of action of the joystick，That is to make the goods stable and reliable，You cant break the cargo。 2、Fork lift lever。When lifting cargo，You should step on the accelerator first，Improve the operation and power of the motor；The lifting speed of the fork can be controlled
Angular contact ball 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。]Mainly used in machine tool spindle。In most cases，This 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 are generated on the shaft
According to the production process or product characteristics，Can be divided into high pressure methylamine pump、Cryogenic pump、Phosphate slurry pump, etc。In chemical or petrochemical production，Pump at high temperature、hypothermy（Or ultra-low temperature）、High tension、inflammable、explosive、Work under toxic and corrosive media，Some are still under high inlet pressure、High lift、High viscosity、Small flow、Work under high cavitation conditions，The performance of chemical pump is very demanding，Especially for corrosion resistance、No leakage allowed（Antitoxic medium）And wear resistance requirements are extremely high。To meet the special requirements of chemical production，In the chemical machinery industry also specialized in the production of chemical pumps，Plastic pump、Glass pump、Ceramic pump、graphite
Electromagnetic brake A brake that uses electromagnetic effects to achieve braking﹐Divided into electromagnetic powder brake and electromagnetic eddy current brake two forms(See picture Electromagnetic brake diagram )。Electromagnetic powder brake﹕An exciting coil forms a magnetic field when it is energized﹐Magnetic particles are magnetized by a magnetic field﹐Forming a magnetic powder chain﹐And polymerized between the fixed magnetic conductor and the rotor﹐Braking is achieved by the binding force and friction force of magnetic particles。When the excitation current disappears, the magnetic powder is in a free and loose state﹐Release of braking。This brake is small in size﹐Light weight﹐Low excitation power﹐And the braking torque has nothing to do with the rotating speed﹐But magnetic particles can cause parts to wear out。It is easy to self
Regular cleaning of equipment using the correct industrial cleaning method is an essential link in industrial production。One of the main uses of high pressure water jet technology，Is to carry out industrial cleaning。Its essence is a high pressure pump（Or supercharger）It produces a high pressure stream of water and jets a high speed stream of water through the nozzle，Wash the cleaning object、denude、excision、Strike to achieve the purpose of cleaning。It has a、Energy conservation、pollution-free、non-corrosive，The equipment has strong versatility，Low cleaning cost Other cleaning methods（Manual cleaning、Chemical cleaning、Ultrasonic cleaning、Gas sandblasting, etc）Irreplaceable advantages。 In recent years，Cleaning equipment
(1) 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。]Raceway sound and its control method Raceway sound is when the bearing is running，A smooth continuous sound made by its rolling body rolling on the raceway surface，It is a basic sound unique to all rolling bearings。The general bearing sound is the raceway sound plus other sounds。 The track sound of ball bearings is irregular，Frequency in1000Hzabove，thereof
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