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introduction：（1） Environmental condition：The ambient temperature is the main factor； （2） Working condition：Oil pump type、Working pressure、temperature、Rotational speed、Oil and metal、Adaptation of seals and coatings sex、System operating cycle and working characteristics； （3） Properties of hydraulic fluids：Physical and chemical guidelines for oil products、Use performance and characteristics, etc； （4） economy：The price of oil、Service life。 After selecting the appropriate hydraulic oil，Management and maintenance are very important in the process of use，The following points should be noted。 ① Prevent contamination of hydraulic oil：The biggest damage caused by pollutants is corrosion of equipment，
2015-01-22 Reading quantity 1643
introduction：Grease lubricated with pre-sealed type 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。]Sealing method of filling grease，And fill an appropriate amount of grease inside the housing，A filling method of fat supply that is supplemented or replaced at regular intervals。In addition，Yes, there are manyIKOBearings require lubrication of machinery，Pipes are also used to connect to the concentration of each lubrication point
2015-01-22 Reading quantity 1538
introduction：A high-speed rotating impeller is used to transfer momentum to gas molecules，A vacuum pump that produces a directional flow of gas。The advantage of turbomolecular pumps is that they start quickly，It can resist all kinds of rays，Atmospheric shock resistance，No gas storage and desorption effect，No oil vapor pollution or little pollution，Access to clean ultra-high vacuum。Turbomolecular pumps are widely used in high energy accelerators、Controlled thermonuclear reaction device、Heavy particle accelerators and advanced electronic device manufacturing。 Structure and working principle1958years，Federal GermanW.Baker was the first to propose a practical turbomolecular pump，Subsequent release
2015-01-22 Reading quantity 2845
introduction：Movement and dynamics according to structure3Various aspects are required to design new institutional theories and methods,Can be divided into structural synthesis、Motion synthesis and dynamic synthesis3section。formerly，The classical mechanism study is only a synthesis of the first two aspects，But with the development of machinery to high speed and high precision，Modern institutional studies also often include a 3Synthesis of aspects。Corresponding to the mechanism synthesis is the mechanism analysis。18End of century peace19The beginning of the century,SwissL.Euler、Russ..Lomonosov、FrenchmanG.MongihoaJ.V.The works of geometers and mechanics such as Pencelle laid the foundation for the synthesis theory of mechanisms。19The second half of the century，Gradually formed to
2015-01-22 Reading quantity 2852
introduction： Engineering principle： The vibrating fluidized bed dryer is vibrated by the exciting force generated by the vibrating motor，The material jumps forward under the action of the exciting force in the given direction，At the same time, hot air is input under the bed to make the material in a fluidizing state，Material particles are in full contact with hot air，To achieve the ideal drying effect。 Application and characteristics： Mainly used in chemical industry、Light industry、Mineral products、medicine、food、beverage、seed、grain、Salt and other industries in powder form、Granular material drying、cooling、Humidification and other operations，Energy conservation、Material surface damage is small、Less dust pollution、Low noise、Long life。
2015-01-22 Reading quantity 2830
introduction：one、SKFbearing[SKFbearing:SKFThe full name is“Svenska Kullager-Fabriken”The Chinese transliterated name is“SKF”；SKFThe group is headquartered in Gothenburg, Sweden，Is a leader in bearing technology and manufacturing。SKFBearings can be divided into sliding according to different specific structures and similarities and differences in working propertiesSKFBearing and rollingSKFbearing]Accessory knowledge Inclined retainer(separable)：A separable have“L”Shape cross-section of the circle，The outer part is used as a centripetal cylindrical rollerSKFbearing[SKFbearing:SKFThe full name is“Sven
2015-01-22 Reading quantity 1600
introduction：Equal force An imaginary force acting on a selected point of a member of a machine。The instantaneous power of equal effect is equal to the sum of the instantaneous power of all external forces and torques actually acting on the machine。The equivalent moment is an imaginary moment acting on a component in a machine﹐Its instantaneous power is equal to the sum of the instantaneous power of all external forces and torques actually acting on the machine。A member subjected to an equivalent effect or equivalent moment is an equivalent member﹐The selected point is the equivalent point。The application of this concept can simplify the mechanical dynamics of single-degree-of-freedom mechanisms。The equivalent effect or equivalent moment is related to the ratio of the velocity parameters of each member in the machine﹐It is therefore a function of the mechanical position
2015-01-22 Reading quantity 2926
introduction： （1）The abrasive has striated marks Scars can be divided into radial scars and circumferential spiral scars。Radial scars are the defects of the workpiece itself，Because the local hardness is different。Circumferential spiral wound，If each workpiece is produced at a certain interval, it is due to the mixing of coarse sand particles，Dressing wheel。Sometimes there are grains of sand on the supporting knife face，It can also cause a circular wound，The grinding fluid should be increased，Without improvement，The material of the blade should be changed。Sometimes the horizontal Angle of the guide wheel or the adjustment of the guide plate is improper，It can also cause spirals，At this time, the guide wheel should be adjusted so that there is a small gap between the discharge end and the abrasive。 （2）Flutter mark A.
2015-01-22 Reading quantity 1530
introduction：The installation of worm gear reducer in principle is based on the size of the output shaft diameter of worm gear reducer to determine the type of reducer bracket，As long as the interface form and size match，The output shaft size of the reducer can be used for floating support of the reducer bracket model within a certain range。If the use of plate reducer bracket，When the installation size of the reducer is inconsistent with the support of the reducer，In a certain range, our factory can speed the connection between the plate and the reducer，Meet user requirements。 Selection of decelerating frame。In principle, the frame type is determined according to the size of the output shaft diameter of the reducer，As long as the interface form and size match，The transmission of the reducer
2015-01-22 Reading quantity 2935
introduction：The machining center is stocked with knives，And can automatically change the tool，Numerically controlled machine tools for multi-step machining of workpieces。 The workpiece after a clamping，The digital control system can control the machine according to different processes，Automatic tool selection and replacement，Automatic change of machine spindle speed、The amount of feed and the movement of the tool relative to the workpiece and other auxiliary functions，Complete the processing of several surfaces of the workpiece in turn。 Machining center due to the concentration of processes and automatic tool change，The workpiece clamping is reduced、Measurement and machine adjustment time，Making the cutting time of the machine tool reach the starting time of the machine tool8O％around(Ordinary machine tools are only15～20
2015-01-22 Reading quantity 2812
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