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introduction： one、Scheme overview Jinghe River330Kv power transmission and transformation project is one of the key projects in Shaanxi Province，The project is an important part of Shaanxi power grid，After the station is completed，Will replace220Qianfu Yanliang substation，Become an important power source for the region，It will also become an important hub substation of Shaanxi power grid。The project adopts international advancedIEC61850，IEC61850is“Substation communication network and system”The series of international standards，Represents substation automation system（SAS）The latest development direction。At present, the substation communication protocols widely used are mainlyIEC6
2015-02-06 Reading quantity 2794
introduction：In the forming process，Moisture control and the choice of molding processing conditions are the two most important factors affecting the quality of molded products，It is described below： Moisture control PCSimilar plastics will hydrolyze and break the bond even if they encounter very low moisture、The phenomenon of decreasing molecular weight and decreasing physical strength。So before the molding process，The moisture content of polycarbonate should be strictly controlled0.02%below，To avoid the reduction of mechanical strength of the molded product or the formation of bubbles on the surface、Abnormal appearance of silver grain, etc。To avoid abnormal conditions caused by water，Polycarbonate before processing，It should be dried by hot air dryer for more than three to five hours，Temperature setting
2015-02-06 Reading quantity 2789
introduction：Spindle bearings for machine tools[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。]Regular maintenance of equipment、Thrust ball bearings removed during operation and replacement of peripheral parts are inspected，Need to judge in turn whether the second bearing parts can be used again and record the use of better than worse。Also carefully investigate and record the removed bearing and appearance。for
2015-02-06 Reading quantity 1556
introduction：Welding as a filler metal or as a wire welding material for conducting electricity。In gas welding and tungsten gas arc welding，Welding wire is used as filler metal；In submerged arc welding、Electroslag welding and other metal gas arc welding，The welding wire is the filler metal，It is also a conductive electrode。Welding wire can be divided into3class。 ①Rolled welding wire：Most welding wires fall into this category，Carbon steel welding wire included、Low alloy structural steel welding wire、Alloy structural steel welding wire、Stainless steel welding wire and non-ferrous metal welding wire。 ②Cast welding wire：Some alloys，Such as cobalt chromium tungsten alloy，Dont
2015-02-06 Reading quantity 2803
introduction：So-called clutch，As the name implies, it is to use“From the”with“us”To deliver the right amount of momentum。Clutch by friction plate，Spring blade，The pressure plate and the power output shaft are composed，It is arranged between the engine and the gearbox，To send The torque stored on the motor flywheel is transmitted to the gearbox，Ensure that the vehicle transmits the right amount of driving force and torque to the driving wheel under different driving conditions，Its in the powertrain category。In half linkage，Clutch power input The end and the power output end allow speed difference，That is, through its speed difference to achieve the transfer of the right amount of power。 The clutch is divided into three operating states，You dont depress the clutch
2015-02-06 Reading quantity 2793
introduction：1、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。]Preparation for Because the bearings are treated with rust and packed，Therefore, do not open the package until the installation is ready。 In addition，The anti-rust oil coated on the bearing has good lubrication performance，For general purpose bearings or bearings filled with grease，Dont have to clear
2015-02-06 Reading quantity 1534
introduction：While the institution is operating，InstallTIMKENbearing[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 parts are allowed to have a certain temperature，When touching the body shell with the hand，It should be normal not to feel hot，Otherwise, the bearing temperature is too high。 The reasons for the high bearing temperature are：Lubricating oil quality does not meet the requirements or deterioration，Lubricating oil viscosity
2015-02-06 Reading quantity 1567
introduction： one、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。]Type of steelG5FHeat treatment technology network——Ningbo Heat treatment society class typeG5FHeat treatment technology network——Ningbo Heat treatment society
2015-02-06 Reading quantity 1544
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 pinwheel reducer to prevent oil pump oil cut-off，To avoid damage to the parts of the reducer
2015-02-06 Reading quantity 2868
introduction： Stainless steel steam valve has sand holes,People often think of using argon arc welding to repair welding，However, cracks were found in the weld after welding,Not enough to fix the valve。With what to repair，How to fix The cold welding function produced by our company is very good to repair the sand hole of stainless steel steam valve,And it doesnt crack，Strong welding，Compact non-shedding。 Cold welding machine repair technology is relative to argon welding，The cold welding machine uses a large current pulse to flow instantaneously through the joint surface of the workpiece and the repair material，A technique that allows it to melt together quickly。Because it produces very little heat during welding，Base parts and materials near solder joints are kept at room temperature，the
2015-02-06 Reading quantity 2908
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