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introduction：by4A specially arranged spatial linkage consisting of two rotating pairs(See picture[Bennett mechanism])。Such an institution is the British Bennett Yu 1903proposed。In general,by4The degree of freedom of a space mechanism composed of two rotating pairs is zero，But Bennett made a special arrangement，This kind of institution got 1Per degree of freedom。The conditions of institutional arrangement are：①The relative length of the rod is equal，The alternate angles of the rotating auxiliary axes are equal；②The cross-angle of the rotating auxiliary axis of the bar is reversed，That is, the cross Angle of a bar is or，Then the cross Angle of its opposite rod is-or-；③The cross-angle between the length of the member and the rotating auxiliary axis is satisfied[00
2015-02-07 Reading quantity 2799
introduction： 1、Oil absorption and pressure processes Suction and pressure of fuel injection pump，It is completed by the reciprocating movement of the plunger in the plunger sleeve。When the plunger is in the lower position，The two oil holes on the plunger sleeve are opened，The inner cavity of the plunger sleeve communicates with the oil passage in the pump body，Fuel quickly fills the tank。 When the CAM is on the roller of the roller body，The plunger rises。Move upward from the beginning of the plunger until the oil hole is blocked by the upper end face of the plunger。In this period of time，Due to plunger movement，Fuel is squeezed out of the oil chamber，Flow passage。So this lift is called pretravel。When the plunger blocks the oil hole
2015-02-07 Reading quantity 2873
introduction：jiaguanfa Pinch valve pinch valve Use rubber tubes as valves for opening and closing parts and channels。Rubber hose against it、The lower chuck moves relative to each other and opens and closes(See picture[Clamp valve structure diagram])。The chuck is moved by means of manual mechanism or pneumatic。The main feature of pinch valve is smooth passage、Wear and corrosion resistance。It is a good wear-resistant valve，It can also be used as a corrosion resistant valve,It is suitable for conveying materials containing solid particles such as mineral sand mud and corrosive materials，But the working temperature and pressure are not high。The working pressure of this valve is generally not greater than0.7mpa，Nominal path No
2015-02-07 Reading quantity 2782
introduction： humanization-machine-The environment system is the object﹐The branch of industrial psychology that studies the behavior of people in systems and their interactions with machines and the environment。Its purpose is to match the engineering technology design with the physical and mental characteristics of the person﹐Thus improve the efficiency of the system﹑Ensure man-machine safety﹑And enable people to work efficiently and comfortably in the system。 people-machine-Environmental system is a multidisciplinary research problem。There are psychologists who work on this﹑physiologist﹑anthroponomist﹑Medic﹑engineer。In different countries
2015-02-07 Reading quantity 2794
introduction： Autodesk Inventor3D design software is easy to learn、Ease of use，Friendly interface，The built-in design support system improves design efficiency，Its adaptive technology can quickly handle very large assemblies。This article is long used by the authorInventorSpeaking from experience。 one、Installation and customization craftsmanship InventorDuring the installation process，The user is asked to choose whether to allow the model driver dimensions to be modified in the drawing，This setting is selected if you want to modify it，Reinstall onlyInventor。If the choice is yes，Users can edit workers
2015-02-07 Reading quantity 2889
introduction：1、Shaft and 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。]Selection and control of room tolerances：KoyoImported bearing[Imported bearing:Simply put, the import bearing agent refers to the sale of an imported bearing brand。The main brands of imported bearings arenskbearing，ikobearing，fagbearing，Of good quality，And certainly not the price
2015-02-07 Reading quantity 1537
introduction： Feng Ye Mall clutch for you to introduce the relevant knowledge of gear reduction motor。 Gear reduction motor drive hard face reducer saves space，Reliable and durable，High overload capacity，Power reachable132KW;Low energy consumption，Superior performance，High speed reducer efficiency95%above;Low vibration，Low noise，High energy saving;RHigh quality forged steel material is selected for series helical gear reducer with hard tooth surface，Steel cast iron housing，The gear surface is subjected to high-frequency heat treatment;Precision machined，Ensure shaft parallelism and position bearings[bearing:bearing（“Bearing”，Japanese person“Axial receptor”）At the chance
2015-02-07 Reading quantity 2823
introduction：jigouxue mechanism theory of mechanisms A discipline that focuses on the structure and motion of mechanisms in machinery，Is the main branch of mechanical principle traditional mechanism studies the movement of mechanisms(For example, the movement of a nut)See it as only related to the way its constrained geometrically,Force on、Quality has nothing to do with time and so on。In this way,in19mid-century,Mechanism is then separated from general mechanics，And growing。The research content of mechanism is to all kinds of common mechanism such as connecting rod mechanism（See planar linkage and spatial linkage）、CAM mechanism、Gear mechanism
2015-02-07 Reading quantity 2805
introduction：chilun jiagong Gear machining gear manufacturing ━━━━━━━━━━━━━━━━━━━━━━━━ Brief history Machining of cylindrical gear Forming cutting Milling teeth Gear broaching Gear grinding Generating cutting method Gear shaping Gear hobbing Gear shaving Gear honing Gear grinding Cutting of bevel gear Cutting teeth of straight bevel gear Milling teeth Gear shaper Double cutter head milling teeth Draw milling teeth Cutting teeth of curved bevel gear Milling teeth of spiral bevel gear Extended epicycloid tooth bevel gear
2015-02-07 Reading quantity 2795
introduction： Including raw material preparation﹑pulping﹑papermaking﹑Until finished in rolls or flat sheets﹐And the machinery used to process paper and board(figure1 pulping(Including alkali recovery)Papermaking process equipment system )。According to the process flow of pulp and paper making﹐Paper making machinery can be divided into material preparation pulping equipment﹑Paper machine and finishing processing machinery three categories。The paper industry consumes a lot of raw materials﹑water﹑Electricity and chemicals﹐And produce a lot of waste water and waste residue。The development of papermaking machinery is to adapt to a wide range of papermaking raw materials﹐Reduce material and energy consumption in the papermaking process﹑Reduce environmental pollution。 Brief history Paper is one of the four great inventions of ancient China。As early as public
2015-02-07 Reading quantity 2799
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