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introduction：Human sweat is a colorless transparent or light yellow with a salty taste of weakly acidic liquid,thereofphBe worth5~6Sodium free、potassium、calcium、Extra-magnesium salt,It also contains small amounts of urea、Lactic acid、Organic acids such as citric acid when sweat comes into contact with metals,A film of sweat forms on the surface of the metal,Sweat film can cause electrochemical effects on metals,Etch metal Under some special conditions of use,Add a small amount of solid lubricant to the grease,If joined3~5％the1Molybdenum disulfide reduces wear,Improve pressure and heat resistance,For high temperature、elegance、High vacuum、Corrosion resistance、Radiation resistance,And special conditions such as extremely low temperatures,fastening
2015-04-21 Reading quantity 1466
introduction： Low alloy steel refers to the addition of a small amount of alloying elements in the steel（Coincidence table5-1）Due to the strengthening of alloying elements，The yield point of low-alloy structural steel is higher than that of ordinary carbon steel25-150%，Plus mostly low carbon，It has good plasticity toughness and weldability，Some also have corrosion resistance、Low temperature resistance and other characteristics，therefore，Low alloy steel is a kind of steel with great development prospect，The proportion of steel production is increasing。 Low alloy steel is divided into ordinary low alloy steel according to quality and use、High quality low alloy steel、Special quality low alloy steel。 General purpose low alloy steel
2015-04-21 Reading quantity 1550
introduction： Apply： Applied to dairy products、Fluid materials such as juice or tea，Instantaneous sterilization of materials at ultra-high temperatures in tubular heat exchangers（UHT）。 Working principle： The equipment is fully automatic，Its operation can be divided into the following four steps： 1．Plant presterilization 2．Sterilization of materials 3．Aseptic intermediate cleaning 4．Final cleaning Before the official production，The equipment is operated under high pressure30Minute hot water cycle，To complete the pre-sterilization treatment of the material channel of the equipment，therewith，Gradually cool the device
2015-04-21 Reading quantity 2808
introduction：IKObearing[IKObearing:IKONeedle roller bearing with its special internal structure to achieve the mechanical design of small、Light weight。Guideway bearings are based on the high quality given by needle roller bearings，Precision machining with unique mechanical equipment，Evaluate the quality of the latest machines，Products always maintain high performance and high quality level。]It is the assembly that supports the rotation of the shaft。Its rings and rolling elements are precision machined。Bearing before factory，In order to protect the raceway and rolling surface from corrosion，The anti-rust oil or anti-rust grease is injected between the raceway and the rolling body。Therefore, the bearing should be cleaned before installation。Shaft sealed with rust-proof oil
2015-04-21 Reading quantity 1563
introduction：Surface roughness is an important technical index that reflects the error of the surface micro-geometry of a part，It is the main basis for inspecting the surface quality of parts；It chooses rationally or not，Directly related to the quality of the product、Service life and production cost。 Mechanical parts surface roughness selection methods are3Kind of，Immediate calculation method、Test method and analogy method。In the design of mechanical parts，The most common application is analogy，This method is simple and convenient、prompt、effective。The application of analogy requires sufficient reference material，More comprehensive information and literature are available in various mechanical design manuals。The most commonly used is to fit the tolerance class
2015-04-21 Reading quantity 2901
introduction： A rotary compressor that compresses and transports gas by rotating motion in the cylinder with a screw rotor。Screw compressors are widely used in mines﹑Chemical engineering﹑power﹑metallurgy﹑unit﹑Machinery and refrigeration。Exhaust volume is25～38000meter3 /when。When inhaling at atmospheric pressure﹐Single stage exhaust pressure can be reached0.5mpa﹔The two - and three-stage exhaust pressures respectively reach1.2mpa3Megapascal plus。Single screw compressors are cooled by liquid injection。Industrial production with two axes(Twin screw)The most compressors﹐monotonic(Single screw)The compressor is also gradually used。 figure
2015-04-21 Reading quantity 2816
introduction：1.Ball 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。]ballbearing The rolling element is the rolling bearing of the ball。 2.Centripetal ball bearingradialballbeari
2015-04-21 Reading quantity 1389
introduction：A control valve for controlling fluid flow or reducing fluid pressure by reducing the cross section of the flow path。The structure of the throttle valve is usually similar to that of the globe valve(See picture Throttle valve structure )﹐The main differences are the change in disc shape and the use of a small pitch stem﹐Therefore, it has better regulating performance than the globe valve。The disc shape of the throttle valve has a window shape(For larger calibers)﹑stopper(For smaller calibers)spicule(For small bore)Etc.。Throttle valves with needle disc are often called needle valves。Butterfly valves are also commonly used as throttle valves。Throttle valves usually operate within a small opening range﹐Strict sealing is not required when closing。Due to throttle
2015-04-21 Reading quantity 2812
introduction：1chromium The decisive role of chromium in stainless steel：There is only one element that determines the genus of stainless steel，This is chromium，Every stainless steel contains a certain amount of chromium。So far，There is no chromium-free stainless steel。Chromium is the main element that determines the properties of stainless steel，The fundamental reason is that chromium is added to the steel as an alloying element，It promotes the internal contradictory movement to develop in favor of resisting corrosion damage。 2carbon The duality in stainless steel Carbon is one of the main elements in industrial steel，The properties and structure of steel are largely determined by the content of carbon in the steel
2015-04-21 Reading quantity 1455
introduction： Rolling 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。]Clearance refers to the maximum possible distance in the rolling bearing for the rolling element to move along the radial or axial direction，Its standard definition is as follows： Radial clearance Non-preloaded state，Rolling bearings capable of bearing radial loads，Its radial internal clearanceGfor
2015-04-21 Reading quantity 1566
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