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introduction：Many large chemical industries、Chemical fiber、The stainless steel equipment and pipes of fertilizer and other equipment are required to be pickled and passivated before being put into operation。Although the equipment has been acid-washed at the factory，Welding slag and oxide are removed，But in storage、transport、The installation process will inevitably cause grease、Loam sand、Rust and other pollution，To ensure the device and equipment test product(Especially chemical intermediates and refined products)The quality can meet the requirements，Guarantee a successful test run，Must be pickling passivated。Such asH2O2Production plant Stainless steel equipment and pipes，It must be cleaned before production，Otherwise if there is dirt heavy metal ions will make the catalyst poisoning。In addition，Such as
2015-02-11 Reading quantity 1450
introduction：guoying peihe lianjie Interference fit joint interference fit joint A joint formed by interference fit between two connected parts（See picture[Type of interference fit connection]），It is often used for connecting shafts to parts with hubs。The connection can be divided into two types: cylindrical interference fit connection and conical interference fit connection。Cylindrical interference fit joint after assembly，The shaft is pressed，The hole is enlarged，Great radial pressure is generated between the mating surfaces。When working, torque and axial force are transmitted by the accompanying friction。The connection can produce the most
2015-02-11 Reading quantity 2789
introduction：The steel industry is a big energy user，The cost of energy purchased accounts for approximately the cost of steel production 25% ，Promoting development by energy saving is a long-term and arduous task for Chinas iron and steel industry。Excessive energy consumption affects the market competitiveness of metallurgical industry，Energy saving and consumption reduction have become a major event that must be made unremitting in metallurgical industry production。The main measures are：Prolong the service life of equipment，Water conservation、Save electricity、simplification。
2015-02-11 Reading quantity 2824
introduction：xuanpian zhenkongbeng Rotary vane vacuum pump sliding-vane rotary vacuum pump An offset rotor equipped with a sliding vane rotates in the pump chamber，A vacuum pump that periodically changes the volume of a pump chamber separated by a sliding plate to achieve air extraction，Also known as sliding vane vacuum pump。figure[Working principle of rotary vane vacuum pump]The working principle of rotary vane vacuum pump。It consists mainly of the pump body（stator）And rotor composition。More than two slides are arranged in the rotor slot，Some pumps also have springs between the slides。The rotor is mounted eccentrically in the pump chamber，
2015-02-10 Reading quantity 2785
introduction：Jixie Gongye Chubanshe China Machine Press Machine Press China editing and publishing machinery industry books professional publishing house，1950years7Founded in Beijing。Formerly known as Science and Technology Press,1952years12The month changed to its current name。He mainly publishes mechanical engineering、Electrical technology、Instrumentation and other aspects of the technical foundation theory、Manufacturing process、Product and plant design、Industrial and business management and other professional books。In addition to monograph，Professional textbooks are also published、Reference books、Workmans book、Product catalog sample books, etc。Now published annually
2015-02-10 Reading quantity 2800
introduction： With 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。]The birth and development of industry，NSKbearing[NSKbearing:Seiko Co., LTD（NSK LTD.）Be established in1916years，It is the first in Japan
2015-02-10 Reading quantity 1455
introduction：jiemian xishu Section coefficient section factor A section geometric parameter of mechanical parts and structures，Formerly called section modulus。It is used to count parts、Flexural strength and torsional strength of member（intensity），Or it can be used to calculate the maximum stress on the sectional surface at a given bending moment or torque。 According to material mechanics，On the beam section with bending moment and bearing torqueT The cross section of the rod,Maximum bending stress[6]And the maximum torsional stress occurs on the surface or point that is farthest from the vertical distance between the bending neutral axis and the torsional neutral point。[6]Number of sums
2015-02-10 Reading quantity 2889
introduction： The laser wavelength is the known length﹑Using the Michelson interference system(See laser length measurement technique)Universal length measuring tool for measuring displacement。There are two kinds of laser interferometers, single frequency and dual frequency。Single frequency is in20century60It appeared in the mid-2000s﹐Originally used for calibration of reference line grain scale﹐Later, it is used for precision measurement of length in the measuring room。Dual-frequency laser interferometer Yes1970nathous﹐It is suitable for use in workshops。The laser interferometer is very close to the standard state(The temperature is...20℃﹑Atmospheric pressure
2015-02-10 Reading quantity 2903
introduction：Using light points on photosensitive recording paper(Or film)A recording instrument on which curves are drawn。It is used to record electrical signals with high changing rates。 Structure and principle The ray oscilloscope consists of a measuring part and a recording part(See picture Light oscilloscope structure principle schematic )。The measurement part is mainly composed of magneto-electric oscillators(See galvanometer)And optical system composition。In flow coil﹑The moving part of a vibrator composed of tensions is provided with a mirror﹐Per illuminant(Incandescent or high pressure mercury lamp)The beam of light is reflected by a mirror﹐Image points are formed by an optical system on a photosensitive recording paper。When a current passes through the coil﹐Coil and mirror are tensioning
2015-02-10 Reading quantity 2900
introduction： High temperature drying existed in the process of TCM extract drying in Chinese traditional medicine pharmaceutical industry、Heat sensitive drug degeneration、Intermittent operation、Easily infected bacteria、Long drying time、High energy consumption，Fall short ofGMPRequirements and many other unsatisfactory places，In view of this situation，Our company has developed a series of vacuum low temperature automatic drying units。 Vacuum low temperature automatic dryer is a series of dryer designed and manufactured for the topic of Chinese medicine extract dewatering into porous instant particles。The extract of Chinese medicine has porosity after drying at low temperature in vacuum、friability、Features of low water content，Therefore, the particles formed by the drying mechanism can be directly used as instant solution
2015-02-10 Reading quantity 2793
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