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introduction：Knuckle bearings are widely used in engineering hydraulic cylinders,Forging machine,Construction machinery,Automation equipment，Shock absorbers for cars，Hydraulic machinery and other industries. Introduction and classification of knuckle bearings Knuckle bearings are spherical plain bearings，The basic type consists of an inner surface with a spherical sliding spherical contact、Outer ring composition。Depending on its structure and type，Can withstand radial load、Axial load，Or radial、Joint axial loads acting simultaneously。Because the spherical sliding contact area of the joint bearing is large，The Angle of inclination is large，At the same time, it is also because most of the joint bearings have adopted special process treatment methods，Such as surface phosphating、galvanize、Chrome plated or outer sliding surface lining、Insert packing、spraying。Therefore, it has a large load capacity and impact resistance，And has corrosion resistance、wear-resistant、self-centering、The characteristics of good lubrication or self-lub
2017-06-13 Reading quantity 320
introduction：PMIThe guideway is high in precision，However, after a period of use, the accuracy will be damaged due to friction，Therefore, this requires the necessary lubrication maintenance。One of the more common problems in lubrication maintenance is that the lubricating oil that has just been changed quickly turns black，This is something that most people dont understand。
2015-05-14 Reading quantity 3100
introduction：A motor speed controller，A hollow shell having a base and a top seat pivot-connected with the base，The top seat, in conjunction with the base, defines a holding space，A guidance unit is provided in the accommodating space、An elastic assembly arranged in the accommodating space and whose bottom end is arranged on the base、The circuit board has always been positioned in the containment space，And a long sliding type variable resistor fixed on the circuit board and electrically connected with it and having an adjusting member for adjusting the resistance value，Through the top seat、The up and down displacement of the guiding unit and the adjusting member controls the speed of a motor。The utility model is easy to assemble and can simplify the manufacturing process、Reduce manufacturing costs。
2017-07-17 Reading quantity 478
introduction：A pneumatic conveying device that uses the static pressure of air to press or suck a container containing material in a pipe。1861years﹐The post Office in London built the first practical line of container piping。thereafter﹐In Berlin﹑Paris﹑Cities such as Vienna and Munich have also built such conveying devices﹐For post office﹑bank﹑Hospitals and libraries carry mail﹑Summons and sample。Because the transport container is small﹐In the shape of a small bucket﹐This conveying device is also known as the air delivery bucket。After solving technical problems such as the impact of large containers when they stop and the manufacture of pipes﹐Federal Germany1964A pipe with a diameter of 450millimeter﹑The container is equipped with running wheels at both ends﹑Conveying distance is2200The utility line of the pressure feed type pipeline conveying device。70age﹐The Soviet Union﹑The United States and Japan have also built large container-type pipeline transportation devices。This conveyer has low operating costs﹐Safe and reliable
2015-02-14 Reading quantity 2906
introduction：There are many flow meters used to measure the flow of dirty water and clean water on large diameter pipes，But each has its own strengths and weaknesses。In measurement，Some flow meters are wound by debris because of the moving part，As a result, its accuracy decreases，Cant even use。Some are covered by debris due to a certain use element inside the instrument，Normal sending of messages is affected，Some are affected by scale，At the same time, the flowmeter of the large pipe is too heavy，Installation and transportation are extremely inconvenient，And its expensive.，energy-intensive，meanwhile，Some current meter users are not easy to master the use and maintenance technology，Difficult to popularize。The plug-in ultrasonic flowmeter and electromagnetic flow calculation solve these problems well。
2015-03-10 Reading quantity 2971
introduction：Liquefied natural gas(LNG)It is one of the fastest growing hydrocarbon fuels in the world，Bring with itLNGIncreased demand for additional facilities for production and transportation，This will require the development of new technologies that are low-cost, safe and reliable。 For transportLNGFor such a low-temperature product，Todays piping technology is both flexible and flexible，Rigid piping is also available。The former is due to high cost and limited insulation，Load and unload only for short distances，Rigid pipes can be used for longer distances。With the advent of modern submarine cryogenic pipeline design，LNGThe effective transport distance can be reached32km。
2015-03-14 Reading quantity 2987
introduction： Worm reducer is characterized by the outer size is not large，A large transmission ratio can be obtained，Work smoothly，Less noise，But the efficiency is low。One of the most widely used is the single-stage worm reducer，Two stage worm reducer is used less。 Single-stage worm reducer can be divided into upper and lower worm according to the position of worm 、 Three kinds of lower worm and side worm。Single stage worm reducer drive ratio rangei=10~70。 The worm configuration scheme mentioned above
2014-12-10 Reading quantity 3100
introduction：The expanded two-stage cylindrical gear reducer is the simplest of the two-stage gear reducers 、 One of the most widely used。Its gears are not symmetrical with respect to the support position，When the shaft is deformed，The load is not evenly distributed on the gear，Therefore, the shaft should be designed to have a large stiffness，And keep the gear away from the input or output end。Generally used in the center distance sumae<=1700mmIn the case of。 Two-stage cone－Cylindrical gear reducer Single-stage bevel gear reducer and two-stage cone－Cylindrical gear reducer is used where input shaft and output shaft are required90DConfiguration of the drive。
2014-12-16 Reading quantity 3079
introduction：Cylinder gear reducer design expert system(CGREST）This paper discusses the design of cylindrical gear reducer expert system（CYLINDRIC GEAR REDUGER DBSIGN EXPER Cylinder gear reducer design expert system(CGREST）The development of
2015-01-25 Reading quantity 2916
introduction：What is a frequency converter？ Frequency changer（VFD）Is the application of frequency conversion technology and microelectronics technology，The power control equipment of AC motor is controlled by changing the working power frequency of motor。The frequency converter is mainly commutated（Ac to DC）、filtering、inverse（Dc to AC）、Brake unit、Driving unit、Detection unit, microprocessing unit, etc。Inverter internalIGBTTo adjust the output power supply voltage and frequency，According to the actual needs of the motor to provide its required power supply voltage，Thus achieving energy saving、Purpose of speed regulation，In addition，The inverter also has many protection functions，Like overflow、overvoltage、Overload protection etc.。 Inverter working principle The main circuit is the power conversion part that provides the voltage and frequency regulation power supply to the asynchronous motor，The main circuit of the inverter can be broadly divided into two categories：The voltage type is a frequency converter that
2017-06-21 Reading quantity 232
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