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introduction： Use spool(plunger﹑Valve clack)Slide on the sealing surface﹐A diverter valve that changes the position of the fluid inlet and outlet channel to control the flow of fluid(Sight valve)。Slide valves are commonly used in steam engines﹑Hydraulic and pneumatic devices﹐The movement of the motion mechanism to obtain a predetermined direction and stroke or to achieve automatic continuous operation。 According to the structure and movement characteristics﹐Slide valves are divided into reciprocating and rotary types。Reciprocating slide valve has a flat single disc﹑Flat double disc and plunger type3Kind of。Plunger type slide valve(figure1 Plunger type slide valve )Widely used in hydraulic and pneumatic devices。 ρ1Be a flow
2015-04-12 Reading quantity 2795
introduction： At present，There are about80%The damage to the parts is due to friction、attritional。Of course，The wear can be reduced by the material science method such as selecting the friction pair material reasonably，And through reasonable structural design to achieve the purpose，Reasonable lubrication is an effective way to reduce friction。Lubrication is the use of a film of material to separate surfaces that move relative to each other，This material has low shear resistance、Cause less wear and tear。The main role of lubricating oil in gear transmission is to reduce friction resistance、Reduce wear，To extend the service life of mechanical parts as much as possible。In addition，Lubricating oil also has cooling、blunt
2015-04-12 Reading quantity 2881
introduction： Not all damaged bearings[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。]Can be repaired，But for every damaged bearing before considering repair or replacement of a new bearing，The cause and extent of damage must be assessed to avoid or minimize re-damage。cause
2015-04-12 Reading quantity 1448
introduction：Cosmetic packaging in the design and selection of materials are very sophisticated。In the face of todays increasingly competitive market，The packaging of cosmetics must be innovative，So the demand for new packaging materials is also coming out。A new generation of packaging materials soon to enter the Chinese packaging market———Vacuum aluminized paper is beautiful、High quality and environmental protection and many other advantages，Start with cigarette packaging that requires high security and aesthetics，Is widely used in tobacco and alcohol、food、Daily chemical、Department store、Gifts and other industries，Will become the focus of high-grade cosmetics outer box packaging materials。 Vacuum aluminized paper has a metallic luster and is easy to print，Capable maximum
2015-04-12 Reading quantity 2779
introduction：[Get_ArtXMLFile_Contentmistake：]No corresponding file found！
2015-04-12 Reading quantity 2893
introduction： The oil seal is made by controlling the amount of interference between the lip and the mating surface，It can prevent leakage under both dynamic and static conditions，The following conditions must also be met： 1、Oil seals are manufactured according to standard tolerances。 2、Requirements for shaft surfaces，Like the roundness of a shaft、jitter、Impact load、Deformation and other dynamic properties should be controlled within limits，In order to establish and maintain a satisfactory oil film。 2.1Shaft surface roughness Whether the seal ring is working，Shaft surface roughness is a major factor，（Rａ＝0.2～0.8υｍorRｚ＝1～4υｍ、Rｍａｘ＝6.3υｍ）
2015-04-12 Reading quantity 1441
introduction： Installation conditions are one of the first factors in use，Plain 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。]Often due to improper installation, the stress state between the components of the whole set of bearings changes，Bearings operate in an abnormal state and fail prematurely。Install according to thrust ball bearing，Use，maintenance
2015-04-12 Reading quantity 1440
introduction：1、Contact fatigue failure Contact fatigue failure refers toFAGbearing[FAGbearing:The main shaft bearing is made of a solid inner ring、Outer ring、The ball、And a single row angular contact ball bearing consisting of a cage assembly with a solid window cage。]The working surface is subjected to alternating stress and produces failure。Contact fatigue spalling occurs inFAGbearing[FAGbearing:The main shaft bearing is made of a solid inner ring、Outer ring、The ball、And a single row angular contact ball bearing consisting of a cage assembly with a solid window cage。]Working surface，Often accompanied by fatigue cracks，It is first generated from the maximum alternating shear stress below the contact surface，then
2015-04-11 Reading quantity 1532
introduction：becauseTIMKENImported bearing[Imported bearing:Simply put, the import bearing agent refers to the sale of an imported bearing brand。The main brands of imported bearings arenskbearing，ikobearing，fagbearing，Of good quality，Of course, the price is not cheap。]Is a high precision product，If the assembly is not proper, it is easy to cause damage to the bearing channel，Cause bearing damage。Bearings should be equipped with special molds，Cant knock at will，When pressing into the shaft can only be small circle force，When pressing the big circle, only the big circle can be stressed。Pneumatic or hydraulic pressure is required for assembly，The upper and lower die should be outside the horizontal state when pressing，If there is tilt will lead to bearing groove
2015-04-11 Reading quantity 1449
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。]As imported bearing[Imported bearing:Simply put, the import bearing agent refers to the sale of an imported bearing brand。The main brands of imported bearings arenskbearing，ikobearing，fagbearing，Of good quality，Of course, the price is not cheap。]One of，Run in peacetime
2015-04-11 Reading quantity 1543
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