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A device for accurately measuring fuel according to the load of the diesel engine and injecting it into the combustion chamber in a timely manner。The oil spray matches the combustion mode﹐Make fuel and air form a combustible mixture conducive to combustion。This system starts the diesel engine﹑idling﹑power﹑Oil consumption﹑Noise and blowdowns have significant effects。 Brief history Diesel engines were initially air-injected﹐It uses high-pressure air to inject fuel into the cylinder。This method can obtain a uniform combustible mixture﹐Burn well﹐But you need an air compressor﹑Coolers and water separators, etc﹐Complex and large installation﹐High fuel consumption﹐It was later phased out by mechanical injection。Mechanical injection
1.Frictional compatibility The property of preventing adhesion and boundary lubrication when the bearing diameter is in direct contact with the bearing bush。The material factors that affect the friction compatibility of friction pairs are： （1）The degree of difficulty in forming alloys in metallurgy。 （2）Affinity of material to lubricant。 （3）Friction factor of the auxiliary material in the non-lubricated state。 （4）Microstructure of materials。 （5）Thermal conductivity of the material。 （6）The size of the surface energy of the material and the characteristics of the oxide film。 2.entrapability The material allows foreign hard particles in the lubricant to clamp in and prevent scratching or scratches（and）grinding
Remove the casting from the mold﹐Eliminate the excess outside the body﹐And grinding the process of finishing the inner and outer surfaces of the casting。The main work is to remove the core and core iron﹐Cut gate﹑Riser head﹑Stretching and fleshing﹐Remove the casting sand and surface foreign matter﹐Blade cutting﹑Protrusions such as slits and burrs﹐And grinding and finishing casting surface。 The cleaning method of castings is mechanical﹑Physical methods and chemical methods 3class。The mechanical method is the use of various manual and mechanical tools or different types of mechanical equipment generated pressure﹑strike﹑shear﹑Grinding and other forces act on the casting﹐To achieve the purpose of cleaning。The physical method is to use
There is graphite in several aviation oil transport pumps produced per unitM106HThe material is a sealing ring type part，One letter stands for oneSKFbearing[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]The type of its Canon
The National Development and Reform Commission recently approved the release228Industry standard。among，Machinery industry has129item，Building materials industry has17item，The power industry has34item，The automotive industry has23item，Non-ferrous metal industry has2item，Packaging industry has5item，Petrochemical industry has18item。The above standards are from2005years4month1Effective from date。 It is reported，The new standard will be published by the relevant publishers。among，The machinery industry standard is published by the Machinery Industry Press。
INAbearing[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 configuration includes not only rolling 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，To reduce power
A threading tool with the same main parameters as the threaded hole being machined﹐Used for cutting or trimming internal threads。When processing small size screw holes﹐Tap is almost the only processing tool。Taps are often divided into hand taps﹑Machine tap﹑Nut tap(Used for cutting threads on nut machining machines)﹑Die tap(Used for cutting and correcting die threads)﹑Pipe thread tap and taper thread tap, etc(See picture Tap type and structure )。 Machine and hand taps are standard taps for cutting ordinary threads。China is accustomed to manufacturing precision
In order to meet the rapid development of the machine tool industry，And the photoelectric industry needs for micro machining，Ultra-high speed aerostatic 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。]The speed has now exceeded3x10e6DN，Equivalent to the surface velocity of the shaft exceeding150m/
NSKbearing[NSKbearing:Seiko Co., LTD（NSK LTD.）Be established in1916years，It is the first manufacturer to design and produce bearings in Japan。NSKThe function of the bearing fit is to makeNSKThe stationary ring and rotating ring of the bearing are respectively the stationary part of the installation part(Usually a bearing seat)And rotating part(Usually an axis)Solidify together，Thus, the basic tasks of transferring the load in the rotating state and defining the position of the moving system relative to the stationary system are realized。]The seal is more effective than the dust cover、And is limited by flexible rotation and low speed rotation。When the designer chooses the right seal，
1.Frictional compatibility The property of preventing adhesion and boundary lubrication when the bearing diameter is in direct contact with the bearing bush。The material factors that affect the friction compatibility of friction pairs are： （1）The degree of difficulty in forming alloys in metallurgy。 （2）Affinity of material to lubricant。 （3）Friction factor of the auxiliary material in the non-lubricated state。 （4）Microstructure of materials。 （5）Thermal conductivity of the material。 （6）The size of the surface energy of the material and the characteristics of the oxide film。 2.entrapability The material allows foreign hard particles in the lubricant to clamp in and prevent scratching or scratches（and）Particle mill
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