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introduction：one、The function of leakage protector 1.What is a leakage protector a：Leakage protector（Leakage protection switch）Its an electrical safety device。Install the leakage protector in the low voltage circuit，When leakage and electric shock occur，And reaches the operating current value limited by the protector，Immediately in a limited time action automatically disconnect the power supply for protection。 2.What is the structural composition of the leakage protector a：The leakage protector is mainly composed of three parts：Detecting element、Intermediate amplifier link、Operating actuator。 ①Detecting element。It consists of zero sequence transformer，Detection leak
2015-01-05 Reading quantity 2886
introduction：1.Precision improvement method 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。]After the installation on the host is complete，Such as measuring the radial runout of the spindle，It can be found that the measured value of each turn has a certain change；When measuring continuously，It can be found that after a certain number of revolutions，This change is approximately repeated。Measure the change
2015-01-05 Reading quantity 1451
introduction：1.Learn about developments in the field of machine lubrication Lubrication products and technologies are constantly evolving，So you need to keep up to date。Knowledge of the plants lubrication system by managers and employees is essential to prevent shutdowns、Equipment maintenance、One of the important ways to avoid loss。 2.Implement lubricating oil analysis plan An important measure to extend the service life of lubricants is the implementation of a comprehensive lubricant analysis program，By comparing the analysis results with previous analysis reports，The trend of its key wear characteristics can be understood。Such an analysis plan would help to discover the contamination status of the lubricant、Deterioration of lubricating oil、Abnormal machine
2015-01-05 Reading quantity 1459
introduction：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。]Is a standard part。This chapter mainly describes the characteristics of commonly used rolling bearing types，Select the appropriate bearing type and size according to the working conditions，And carry on the combination design。 1summarize Rolling bearing is a widely used mechanical support。Its function is to ensure that the bearing has sufficient life conditions，
2015-01-05 Reading quantity 1535
introduction：Kinematic chain Several members are connected by a motion pair﹐But there is no assembly with definite motion﹐It can be divided into closed chain and open chain。Every member of a closed chain has at least2A sports subelement﹐Where each member has only two moving secondary elements is a single closed loop chain﹐wherein1OR1More than one component has3OR3A multi-closed loop chain with more than one moving accessory element。As long as there is1A component contains only1Every kinematic subelement has an open chain。When there is movement in the chain 1Each member is designated as a rack﹐Several components are active components﹐Thus the whole assembly has a definite motion time﹐The chain of motion becomes the mechanism。Identical kinematic chain﹐Different in designation
2015-01-05 Reading quantity 2796
introduction： 1 Overview of power station Gecang Hydropower Plant in Gaozhou City, Guangdong Province is a runoff type power plant，Rainwater collection area39.6km2，Installed capacity2800kW，One of800kW，The other2000kW。The models of the turbines are：HLA218-WJ-60andHL160-WJ-71；The generator models are：SFW800-6/1180andSFW2000-6/1430。The two water turbine generator sets are the products of Chongqing Water Turbine Factory，It is a two-point structure，Thrust bearing[bearing:bearing（“Beari
2015-01-05 Reading quantity 1548
introduction：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 service life and reliability are closely related to the smelting quality of bearing steel to a large extent。Due to the characteristics of bearing steel，The requirements for smelting quality are much stricter than those for general industrial steel，Like the chemical composition of steel、purity、Organization and uniformity, etc。 one、
2015-01-05 Reading quantity 1552
introduction： 1．Press 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。]Structure type classification (1) Bearings are different according to the load direction or nominal contact Angle they can withstand，Fall into： 1) Radial bearing----It is mainly used for rolling bearings bearing radial loads，Its nominal contact Angle is from0to45。According to the
2015-01-05 Reading quantity 1402
introduction：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。]Materials include materials for rolling bearing parts and cages、Rivets and other auxiliary materials。Rolling bearings and their parts are mostly made of steel，The steel used for rolling bearings is usually high carbon chromium steel and carburized steel。With the development of modern science and technology and the use of rolling bearings is increasing，To the bearing
2015-01-05 Reading quantity 1561
introduction： Powder metallurgy is the processing method of preparing metal powder and making metal powder or a mixture of non-metal powder into products by forming and sintering processes，Special materials that are difficult to be prepared by ordinary melting methods can be prepared，It can also manufacture various precision mechanical parts，Save labor and materials。However, its mold and metal powder costs are higher，Do not use when the batch is small or the product size is too large。Powder metallurgy materials and processes compared with traditional material processes，Have the following characteristics： Powder metallurgy is the processing method of preparing metal powder and making metal powder or a mixture of non-metal powder into products by forming and sintering processes，attainable
2015-01-05 Reading quantity 1451
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