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introduction：Supercritical fluid extraction (SFE) is a new kind of biological separation and refining technology that emerged in the late 1970s.It has developed rapidly in recent years，especially1978The worlds first was held in Essen, West Germany“Supercritical gas extraction”Since the symposium，It is widely used in chemistry、petroleum、food、medicine、Health care products and other fields，It is widely valued by all countries in the world，In our country has been listed as the national key development of high-tech projects during the ninth Five-Year Plan period。The following is a brief introduction to the application of supercritical fluid extraction technology。 (1).Applications in food Traditional edible oil extraction
2015-05-06 Reading quantity 2923
introduction：1General rules1.0.1In order to ensure the construction quality of electrical equipment wiring engineering，Promote technological progress，Ensure safe operation，Formulation of this specification。1.0.2This code applies to buildings、In the structure1kVConstruction and acceptance of the following wiring projects。1.0.3The construction of the wiring works shall be carried out according to the approved design。When modifying the design，Subject to the consent of the original design unit，Can proceed。1.0.4The equipment used and its transportation and storage，It should conform to the relevant provisions of the current national standards；When the product has special requirements，It should comply with the provisions of the product technical documents。1.0.5After the equipment arrives at the construction site，Should be obeyed
2015-05-06 Reading quantity 2810
introduction：Conditions of use of greases Varieties of greases、Many brands，Performance varies。To make the mechanical parts well lubricated，Reasonable selection of grease is very important，The selection of grease should consider the following factors： •The function of the required grease，Lubrication or protection。 •The temperature of the lubricating part、load、Speed and service life。 •Centralized pumping lubrication、Regular fat or long-term use without replacement。 •The working conditions are intermittent or periodic，There is no shock load and vibration。 •environment
2015-05-05 Reading quantity 1545
introduction： into type , sex , long with road his No. Injection pressure
2015-05-05 Reading quantity 2810
introduction： Equipped with special car or special equipment﹐A car used for specialized transportation or operations。With the development of economy﹐The variety and number of special purpose vehicles are increasing day by day。Regular use of special purpose cars are500cospecies﹐In industrialized countries﹐There are more than a thousand kinds of special purpose cars。Special purpose vehicles can be divided into general special purpose vehicles and industrial and mining production vehicles in two categories。 General purpose vehicle A vehicle converted from a road truck to transport and perform a variety of different operations。The compartment of a general special vehicle used for transportation has a box type﹑
2015-05-05 Reading quantity 2812
introduction： Throttling process: Fluid flow due to sudden narrowing of channel section(orifice﹑Valve etc)And the thermodynamic process that reduces the pressure。In the process﹐If the fluid has no heat exchange with the outside world﹐It is called adiabatic throttling。Throttling process is an irreversible and variable process。After the fluid passes through the adiabatic throttling﹐Entropy increase。 When the kinetic energy of the fluid does not change before and after adiabatic throttling﹐Its enthalpy stays the same。 The fluid temperature change before and after adiabatic throttling is called the temperature effect of adiabatic throttling﹐Adiabatic throttling coefficient or joules can be used－Thomson coefficientJ representation 〉0﹑〈0and=0﹐points
2015-05-05 Reading quantity 2891
introduction： Radial thrust 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。]Bear radial loadRwhen，Because there is a contact Angle between the contact line between the rolling body and the raceway and the bearing axisα，So the reaction of each rolling elementNiIt doesnt point to the radius，Its along the normal of the contact，It can be decomposed into a radial component and an axial component
2015-05-05 Reading quantity 1566
introduction： 1.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。]Model selection：The bearing type is generally determined by the users technical personnel according to the use conditions and load bearing of the supporting productsFAGbearing[FAGbearing:The main shaft bearing is made of a solid inner ring、Outer ring、The ball、And a single column consisting of a cage assembly with a solid window cage
2015-05-05 Reading quantity 1390
introduction：Due to the processing characteristics of the machining center，Before writing the processor，First of all, pay attention to the application of the tool change program。 Different machining centers，The tool change process is not exactly the same，Usually, tool selection and tool change can be carried out separately。After the tool change, start the spindle，The processing content of the following program segment can be carried out。The tool selection action can be overlapped with the machining of the machine tool，That is, the cutting time is used for tool selection。Most machining centers provide a fixed tool change point position，Each moving part can only be moved to this position，Before we can start changing knives。 XH714The machining center is equipped with a disk tool store，Through the mutual movement of the spindle and the tool library
2015-05-05 Reading quantity 2907
introduction：The reducer industry takes the road of energy saving and emission reduction，Not only in cleaner production，Energy-saving production，Also reflected in the reducer products。Although Chinas reducer products have been relatively mature，But compared with high-end products in Europe and America，There are still some gaps in design and performance，At present, the development trend of electric motors in the world is simple、Light weight，And Chinas deceleration machine is obviously much larger than the international more common motor。 Large motors not only increase the amount of raw materials used in manufacturing，And it uses more electricity，Obviously does not meet the standards of energy conservation and emission reduction。meanwhile，Because the volume of the motor is too large，The volume of the reducer
2015-05-05 Reading quantity 2878
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