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introduction：Wall temperature at work-20℃The following pressure vessel liquefies ethylene、Liquefied natural gas、The containers used for storage and transportation of liquid nitrogen and liquid hydrogen are low-temperature pressure vessels。Ferritic steel commonly used in pressure vessels is used when the temperature is reduced to a certain temperature,The toughness of steel will decline sharply，Its very brittle,This temperature is often referred to as the brittle transition temperature。When the pressure vessel is used below the transition temperature，If there is a defect in the container、Residual stress、High local stress caused by stress concentration and other factors，The vessel may suffer a brittle rupture without significant plastic deformation, resulting in a catastrophic accident。For low temperature pressure
2015-01-29 Reading quantity 2802
introduction：1 Plastic analysis figure1Product diagram for this bottle cap。It consists of a lid bodyAAnd flapBMake up，The cover body and the clamshell are connected by hinges。After the clamshell closes the lid body，It is not allowed to pop up，So its on the inside of the flapCAnd the outer part of the operculumDBoth are equipped with convex ribs。This cover cannot be used alone，Need to be used in conjunction with another part，Hence its inner sideEIt is also provided with ribs，Clamp the two tightly。No large gap is allowed after the cover is closed，The middle sphere is a thin-walled part，It is required to deform under moderate force，So the wall thickness is0.8 mm，Material with high pressurePE. figure1 Bottle cap product drawing
2015-01-29 Reading quantity 2797
introduction：INAbearing[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。]Much of the maintenance is the same，But every industry is different，It also has different maintenance。Today I will tell you about the pumpINABearing maintenance。 （1)New water pump put into service，Generally in operation100Replace the grease after hours(oil)，In order to
2015-01-29 Reading quantity 1463
introduction： After using the reducer for a long time，There will be a variety of vibration noise and other situations，This means that the internal parts of the reducer are damaged，Need to be repaired or replaced，The following describes the repair method： (1)Gear wear is mainly caused by tooth surface wear，Thus the shaft hole of the gear is broken or the keyway is worn。 (2)Reducer 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，Be used for
2015-01-29 Reading quantity 2900
introduction： Mechanical transmission using friction between two or more wheels pressed against each other to transfer power and motion。Friction wheel drive can be divided into two types: constant transmission ratio drive and variable transmission ratio drive。The transmission ratio is basically fixed, constant transmission ratio friction wheel drive﹐It is also divided into cylindrical flat friction wheel drive﹑Cylindrical groove friction wheel drive and cone friction wheel drive 3Species type(figure1 Friction wheel drive )。The first two types are used for transmission between two parallel axes﹐The latter type is used for transmission between two crossed shafts。Working hours﹐There must be sufficient pressing force between the friction wheels﹐To avoid slipping﹐Damaged friction wheel﹐Affect normal transmission。In phase
2015-01-29 Reading quantity 2815
introduction：Recommend for youRProduct characteristics of coaxial helical gear reducer： RCoaxial helical gear reducer 1、RCoaxial helical gear reducer combined with international technical requirements，It has high scientific and technological content 2、Save space，Reliable and durable，High overload capacity，Power reachable132KW; 3、Low energy consumption，Superior performance，High speed reducer efficiency95%above； 4、Low vibration，Low noise，High energy saving； 5、High quality forged steel material is selected，Steel cast iron housing，The gear surface is subjected to high-frequency heat treatment； 6、Precision machined，Ensure shaft parallelism and position bearings[bearing:bearing（
2015-01-29 Reading quantity 2809
introduction： 1.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。]The roundness of the inner ring channel is an important quality index，It directly affects the working accuracy of the bearing、Smoothness and service life。Grinding is usually a semi-finishing or finishing process of the inner ring groove，It plays a decisive role in the roundness of the finished inner ring channel，The roundness of the inner ring trench grinding is removed
2015-01-29 Reading quantity 1464
introduction： 1、Horizontal cycloidal reducer is lubricated by oil pool under normal conditions，Keep the oil level in the middle of the oil window，Poor working conditions，Cyclic lubrication can be used when the ambient temperature is high。 2、Cycloidal pinwheel reducer is generally used at room temperature40#or50#Mechanical oil lubrication，In order to improve the performance of the reducer、Prolong the service life of cycloidal pinwheel reducer，Recommend to adopt70#or90#Extreme pressure gear oil，Lubricating oil can also be reconsidered when working at high and low temperatures。 3、Vertical installation of planetary cycloidal pin wheel deceleration
2015-01-29 Reading quantity 2799
introduction：闸阀简介:闸阀的启闭件是闸板，闸板的运动方向与流体方向相垂直，闸阀只能作全开和全关,不能作调节和节流。闸板有两个密封面,最常用的模式闸板阀的两个密封面形成楔形、楔形角随阀门参数而异,通常为50,介质温度不高时为2°52'。楔式闸阀的闸板可以做成一个整 体，叫做刚性闸板；也可以做成能产生微量变形的闸板,以改善其工艺性,弥补密封面角度在加工过程中产生的偏差,这种闸板叫做弹性闸板。 闸阀关闭时,密封面
2015-01-29 Reading quantity 2804
introduction： In recent years，Due to grinding wheel、Controls、The development of techniques such as measurement and vibration，TIMKENbearing[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。]New grinding technology and process equipment are constantly applied，There are mainly the following aspects： 1.High speed grinding technology is widely used，The inner surface
2015-01-29 Reading quantity 1459
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