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introduction： A mechanical transmission that uses the mesh of the chain and the teeth of the sprocket to transmit power and motion(figure1 Toothed chain drive )。The average transmission ratio of chain drive is accurate﹐High transmission efficiency﹐The distance between axes has a large adaptive range﹐Can be higher at temperature﹑Use in environments with high humidity﹔But the chain drive can only be used as a parallel shaft drive﹐And its instantaneous transmission ratio fluctuates﹐High transmission noise。 Chain drive has been used in the armillary sphere invented by Zhang Heng in the Eastern Han Dynasty of China。Ever since1874years
2015-04-05 Reading quantity 2790
introduction：Calcination knowledge of high carbon steel(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。]Steel forging)Abstract：A new method for measuring weft tension of loom based on virtual instrument was prepared by electrophoresisZnONanofilm research machinery manufacturing enterprises to enhance the strain capacity of high-speed machining center Structural features and advantages thyristor soft starter will gradually replace the traditional automatic type
2015-04-05 Reading quantity 1544
introduction：（two）The main type of fixture for milling machine During milling，The fixture is often installed on the milling machine workbench，The workpiece together with the fixture is fed with the table。According to the feed mode of the workpiece，Milling machine fixtures can generally be divided into the following two types： 1.Linear feed milling fixture This kind of fixture moves in a straight line with the milling machine table during milling。As shown in the figure8-26The jig shown is a double-station linear feed milling machine。jig1、2Installed on double station turntable3Up.，Pawn jig1Working hours，Available in fixture2Loading and unloading workpieces
2015-04-05 Reading quantity 2771
introduction：Use steam﹑A device for removing ash and slag from boiler heating surface by compressed air or pressurized water。In the boiler﹐Part of the ash produced by the combustion of fuel will adhere to the heating surface of the boiler﹐Affect heat transfer effect﹐Therefore, frequent cleaning is required。The most common method of ash removal is using a soot blower﹐There are also steel ball ash removal﹑Vibration ash removal and acoustic ash removal。Regular soot blowing with a soot blower can improve heat transfer﹐Fuel saving1～2％﹐And can prevent a lot of slag and ash blocking﹐Increase boiler availability。The commonly used soot blowers using steam or compressed air as the soot blowing medium are mainly 4Kind of。 Long retractable soot blower(See picture Long stretch
2015-04-05 Reading quantity 2794
introduction：qiche fadongji Automobile engine automotive engine An engine used to power automobiles。The vast majority of cars use reciprocating piston internal combustion engines fueled by gasoline or light diesel。Cars are mainly used for transportation，The requirement is small in quality、Light and handy、Fuel saving、Adaptable and reliable power plant。Liter power of gasoline engine(Power per liter of cylinder displacement)high，Specific mass（Mass per unit of power）small，Easy start，Low vibration and noise，Used in most cars and light trucks、Some medium-sized buses and vans。Diesel engine fuel consumption is low
2015-04-05 Reading quantity 2771
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。]The inner and outer diameter dimensions are manufactured to standard tolerances，Bearing inner ring and shaft，The tightness of the outer ring and the seat hole can only be achieved by controlling the tolerance of the journal and the tolerance of the seat hole。The bearing inner ring is matched with the shaft by the base hole system，The combination of bearing outer ring and seat hole is made of machine shaft
2015-04-05 Reading quantity 1536
introduction：1.Do routine maintenance，The punching machine can maintain two technical states，Slow down the deterioration process，Discover and eliminate hidden trouble in time，To ensure safe operation。 Using punching equipment“Four requirements”： Neat and tidy：tool、workpiece、Accessories placed neatly，Complete safety protection device，Line and pipeline integrity，Free part，Cordless binding phenomenon。 clean: Equipment internal and external cleaning，No oil scale and accumulation，No bruises，oil-free、water、Gas leakage phenomenon，No deposits in lubricating oil tank，The tank should be cleaned regularly。 oiling：Timely refueling、Oil change，oiler、Oil tanker、Oil cup complete、linoleum、oil
2015-04-05 Reading quantity 1432
introduction：Die predicate one、entry：gate In bit： gate location Nozzle form：gate type Large gate：edge gate Fine nozzle： pin-point gate Nozzle size：gate size Diversion port： switching runner/gate Sprue diameter： sprue diameter two、runner: runner Hot runner： hot runner,hot m
2015-04-05 Reading quantity 2779
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。]，In all the components of the wind power gearbox is one of the weakest links，It has been proved in practice。The wind power gearbox is affected by variable loads and strong wind gusts all year round，So in design、manufacture、Maintenance is different from ordinary gear boxes。 With fan design power
2015-04-05 Reading quantity 1539
introduction： Standard number Standard Chinese name Standard English name ANSI/UL 1002-1996 Electric valves for dangerous and confidential places (Electrically Operated Valves for Use in Hazardous
2015-04-05 Reading quantity 2893
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