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introduction：Corrosion wear A wear associated with corrosion during friction。Metal parts surface in liquid﹑Chemical or electrochemical reactions occur in gases or lubricants﹐Form corrosion products that are easier to wear or peel off﹐Corrosion products are stripped away during friction﹐The exposed new metal surface enters a new chemical reaction﹐This alternates between corrosion and wear resulting in material loss。The destructive effect of corrosion wear is much more than that of simple corrosion or wear。General metal clean surface after contact with the air to form an oxide film﹐The thickness of oxide film on most metal surfaces is0.01micron。When the wear rate is lower than the growth rate of the oxide film thickness﹐oxygen
2015-02-16 Reading quantity 2824
introduction：What are the operation difficulties of electric forklift truck Speaking of the operation difficulties of electric forklift trucks，You will certainly think that stacking operation is one of the most difficult steps to drive an electric forklift，A lot of people practice many times and dont get it right，However, some people often reject the theory of words，I think its useless。So the node is actually right here，Often the combination of theory and practice can be easily mastered。 1、Lower the fork back to the moving position。 2、Load at low，Approach the shelf carefully（The platform must be erected，The pilot stands on the ground and operates）。 3
2015-02-16 Reading quantity 2946
introduction： The technical requirements of piston oil-free dry mechanical vacuum pump are not too complicated，Easy to manufacture。 The pump has a rectangular shape，It is composed of four step pistons and four step cylinders。The shaft directly connected to the motor drives four pistons through four connecting rods。The back space of the piston is pumped by the secondary piston，To reduce leakage and reduce the ultimate pressure。Each cylinder has an intake valve and an exhaust valve。Four pistons make up three compression stages，To increase pumping speed，The two pistons are connected in parallel，In order to facilitate the start of the pump under atmospheric pressure，Auxiliary exhaust valve is set，When the piston exhaust pressure is higher than the atmospheric pressure，there
2015-02-16 Reading quantity 2822
introduction：Whether the material is properly selected is still 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，A device used to reduce the coefficient of friction during power transmission and to keep the center of the shaft fixed。]Factors that must be considered in failure analysis。The main task of failure analysis of double row angular contact ball bearings，Based on a lot of background material、Analyze data and failure patterns，Find out the main factors that cause bearing failure，In order to put forward targeted improvement measures，Extension bearing
2015-02-16 Reading quantity 1564
introduction： Indigo drying is mainly divided into raw powder indigo drying and commercial indigo drying。In general，Indigo for export is mostly raw powder。 The drying method of raw powder is mainly indigo after synthesis，After being filtered by a filter press，Enter the dryer in cake state。At present，The dryers used for raw powder indigo drying in our country are mostly rake dryers、Blade dryer、Rotary fast dryer, etc。In these three models，The first two heat transfer modes of dryers are mainly conduction heat transfer，The latter belongs to convective heat transfer。According to the mode of production，The rake dryer is intermittent drying，Blade dryer、The rotary fast dryer is continuous
2015-02-16 Reading quantity 2838
introduction：Butt 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 inner ring is fitted tightly with the shaft、The outer ring bearing seat hole is a looser fit for the installation of non-separable bearings，The bearing can be first mounted on the shaft by a press，Then install the shaft together with the bearing into the bearing seat hole，If the bearing is small，The case can also be lightly struck with a softer metal hammer The end of the circle is forced
2015-02-16 Reading quantity 1505
introduction：The use of high-speed rotating grinding wheel and other abrasive tools to process the workpiece surface cutting。Grinding is used to process the inner and outer cylinders of various workpieces、Cone and plane,And thread、Gears and splines are special、Complex forming surface due to high hardness of abrasive particles,Abrasive tools have self-sharpening properties,Grinding can be used to process a variety of materials，Including hardened steel、High strength alloy steel、Cemented carbide、glass、High hardness metal and non-metallic materials such as ceramics and marble。Grinding speed refers to the grinding wheel line speed,Generally speaking30～35meter／seconds,exceed45meter／Second time known as high speed grinding grinding is commonly used for semi-finishing and finishing,Accuracy up toIT8
2015-02-16 Reading quantity 2880
introduction： A threading tool for machining or correcting external threads。A die is equivalent to a nut with a high hardness﹐Several chip removal holes are arranged around the screw holes﹐Generally there are cutting cones at both ends of the screw holes。Die is divided into round die according to shape and use﹑Square die﹑Hexagon die and tubular die(See picture The type of die )。Among them, round die is the most widely used﹐The specification range isM0.25～M68millimeter。When the middle diameter of the machined thread exceeds the tolerance﹐The adjusting groove on the die can be cut﹐To adjust the diameter of the thread。Die can be mounted on board
2015-02-16 Reading quantity 2833
introduction：For 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。]Good performance，First of all，To select suitable use premise、Lubrication method for purpose of use。In addition，Increased vibration and friction can greatly increase energy consumption and the risk of premature failure。Method of bearing lubrication，It is divided into grease lubrication and oil lubrication。Thickeners are also related to lubrication
2015-02-15 Reading quantity 1569
introduction：There are many ways to leak oil，But the most common is initiative、The seal of the driven shaft head is leaking oil，In particular, the oil leakage in the sealing ring of the drive shaft is the most serious。In addition to the above several cases，And the following3Oil spill site。 (1)Leakage along the reducer close case face； (2)Leakage along the top sight hole cover of the reducer； (3)Leakage along the oil drain hole at the bottom of the reducer。 Individual reducer in the assembly of the box，There are iron filings on the sealing surface, which makes the sealing surface loose and causes oil leakage。Causes of oil leakage on closing surface，In addition to the above factors，More important is the reducer after a period of use，Shell deformation，Cause closed box face not
2015-02-15 Reading quantity 2779
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