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introduction：abstract：Daily water supply capacity of Jingjiang Water Supply Company10Ten thousand tons，It belongs to small and medium-sized water supply system。Now in its raw water workshop has adopted the liquid viscous speed regulation，Although the obvious energy-saving effect has been achieved，However, the actual use of the process still reflects some problems。In view of this situation，In this paper, some comparisons are made between liquid-viscous speed regulation and electromagnetic speed regulation，It is recommended that electromagnetic speed regulation is more suitable for application in small and medium-sized water supply systems。 introduction： In the water supply，Because water supply demand is a variable that changes from time to time，therefore，It is necessary to adjust the water output of the pump frequently to meet the users needs
2014-12-24 Reading quantity 2845
introduction：Mechanical seal installation and use requirements summary：Must Working conditions Host conditions Select the appropriate type of mechanical seal material match to ensure normal operation service life Install the mechanical seal parts of the shaft sleeve radial runout tolerance0.04mmAxial momentum of rotor0.1mmInstall mechanical seals stationary seal housing positioning end perpendicular to shaft0.04mmMechanical seal installation must be the bushing sealing cavity sealing liquid static and dynamic 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 on the shaft
2014-12-24 Reading quantity 1535
introduction：After superfinishing the rolling surface of the ring，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。]The working performance has been improved in the following aspects： （1）enhanceTIMKENbearing[bearing:bearing（“Bearing”，Japanese person“Axial receptor”）It is fixed and reduced in the mechanical transmission process
2014-12-24 Reading quantity 1480
introduction：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 packaging of the product refers to the 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，Used to reduce power transmission
2014-12-24 Reading quantity 1591
introduction：In order to make the above impact electric spindle 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 material factor of life is at its best，First, it is necessary to control the original structure of the steel before quenching，The technical measures that can be taken are：hyperthermia（1050℃）Austenitic cooling speed630℃Pseudo-eutectoid fine pearlite structure was obtained by isothermal normalizing，Or so cold42
2014-12-24 Reading quantity 1511
introduction： 1、When the magnetic powder brake and clutch are used as winding、Roll out the time of continuous sliding，Product and life depend on conditions of use(relative Sliding speed etc)There are differences between different and different。But generally speaking，The life of iron powder in the stop current when the stop torque is reduced is about4500～7500Hour (s)。however，In some cases it is not available Below freeze-frame torque，Therefore, it can continue to use，Life expectancy can be extended even further。merely，Even with the same sliding working rate，Sliding rotation velocity、That is, the relative rotation speed is continuously at a relatively high speed When in a high state，Life expectancy tends to decrease，Therefore,
2014-12-24 Reading quantity 2892
introduction：1Reducer heat and oil leakage。Worm gear reducer to lift rate，Generally, non-ferrous metal is used as worm gear，The worm is made of harder steel，Because it is sliding friction drive，During operation，It generates a higher amount of heat，The thermal expansion of the reducer parts and seals is different，Thus, gaps are generated on the mating surfaces，The oil becomes thinner as the temperature increases，Easy to leak。There are four main reasons，One is whether the material collocation is reasonable，The second is the surface quality of the meshing friction surface，The third is the choice of lubricating oil，Whether the amount added is correct，The fourth is the assembly quality and the use environment。 2Worm-gear wear。Wormwheel general
2014-12-24 Reading quantity 2829
introduction：1.Remove 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。]Need oil experienced personnel or under their knowledge。 2.Before dismantling，To determine the specific method of disassembly。 3.Keep the necessary bearings handy[bearing:bearing（“Bearing”，Japanese person“Axial receptor”）It was mechanically driven
2014-12-24 Reading quantity 1464
introduction：A boiler that supplies steam to the steam-powered machinery that propels ships。The difference between Marine boiler and land boiler is﹐Matching contour﹑There are strict limits on size and weight。Such as﹐On a warship, it is better to sacrifice the thermal efficiency of the boiler than to install an air preheater﹐Not even a economizer。structurally﹐The boiler should be able to adapt to the sway of the ship﹑Navigation conditions such as roll and impact。Marine boilers must have a certain amount of steam﹑Water storage capacity﹐To meet the needs of steam power machinery frequent and large changes in load。In order to meet the requirements of light and high mobility﹐Heavy oil is widely used。Boiler evaporation capacity is10～200Tons of/when﹐Steam parameters are slightly lower
2014-12-24 Reading quantity 2831
introduction： Spring-operated needle nozzles do not require hydraulic or pneumatic external drives，Instead, the injection pressure and spring elasticity are used to realize the automatic opening and closing of the nozzle，The reliability of its operation is based on the high precision matching between the needle valve and the diverter shuttle。therefore，It not only has high precision、Advantages of high reliability，And it is easy to load and unload on the mold。 Hot runner casting system, that is, no runner casting system, refers to the product after stripping only the product itself without the casting system solidifying material，A mold with such a pouring system is called a hot runner system。In a hot runner system，There are two forms of pouring mouth：open
2014-12-24 Reading quantity 2794
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