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introduction： A component that provides a timed ration of high pressure fuel to the injector。It is the main component of diesel engine injection system。Commonly used in diesel engines are plunger type fuel injection pump and distribution type fuel injection pump。Plunger fuel injection pump has good performance﹐Reliable use﹐It has been widely used。Distribution fuel injection pump Yes20century50A new type of fuel injection pump appeared in the late 1990s﹐It has the advantage of being light﹑Low cost﹑Easy to use。 Plunger fuel injection pump figure Plunger type fuel injection pump pumping principle It is the pumping principle of plunger type fuel injection pump。A chute or spiral groove is milled on the cylindrical surface of the plunger﹐The inner cavity of the groove is connected with the pump cavity above the plunger
2015-03-19 Reading quantity 2794
introduction： The technology of organizing and managing the production and operation activities of industrial enterprises by applying the ideas and methods of systems engineering。Enterprise systems by people﹑fund﹑equipment﹑Raw material﹑Task and information are composed of six elements﹐They all have to meet certain constraints。To carry out management, we must first understand their constraints﹐Thus, the optimal operation of the system can be obtained dynamically under the restrictive conditions。Constraints fall into two categories﹐One is the restriction of economic law﹐One is the restriction of technical conditions。The global maximum is obtained under the condition of constraint
2015-03-19 Reading quantity 2792
introduction： one．Nuclear power valve development status Nuclear power valve is a large quantity and wide range of water pressure equipment in nuclear power plant，Its connected to the entire nuclear power plant300Complementary system，It is a key accessory for the safe operation of nuclear power plants。According to relevant statistics，Existing nuclear power units in the world500reseat，Total installed capacity of up to4Hundred millionKWabove，The main reactor types are pressurized water reactors（PWR）、Boiling-water reactor（BWR）、Graphite pile（LGR）、Fast reactor（FBR）、High temperature gas cooled reactor（HTGR）、Heavy water reactor（PHWR）。among，Pressurized water reactor (PWR) accounts for the entire stack type50%above。
2015-03-19 Reading quantity 2887
introduction：1.Whether the outer packing is clear In general，The factory brands have their own specialized designers for external packaging design，And arrange the production of factories with satisfactory production conditions，Therefore, the packaging is very clear from lines to color blocks，In no uncertain terms。 2.Whether the steel seal is clear inFAGImported 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，Of course, the price is not cheap。]The brand will be printed on the body、Label etc。Very small font，but
2015-03-19 Reading quantity 1440
introduction：Discussion on different speed regulation modes of decelerating motor City-state gear motor is mostly induction motor，In the field of motor and drive, the speed control has been studied。The city-state usually uses a brake to adjust it，In the industry, there is usually a pole change speed、Variable frequency speed regulation、Ac voltage regulation speed regulation and speed regulation with hydraulic coupler and other different ways。And each high-speed mode has its own characteristics。We should consider the advantages and disadvantages of different speed control methods on the basis of the principle of deceleration motor。 one：Principle of gear motor： The reducer motor is composed of a reducer and an induction motor，Reducer principle：Different utilization
2015-03-19 Reading quantity 2897
introduction：one、Blanking process The blanking deformation process can be divided into three stages：The first stage：Elastic deformation stage(figure2onela) figure2-1 Blanking deformation process After the punch makes contact with the material，First flatten the material，Then punch and die cutting edge pressed into the material，Due to bending momentMThe role of，The material not only produces elastic compression but also slightly bends，As the punch continues to press in，The stress on the cutting edge of the material gradually increases，untilhDepth time，The internal stress of the material reaches the elastic limit，This is the elastic deformation stage of the material。
2015-03-19 Reading quantity 2780
introduction： Causes of viscous bending in the mold: 1、Insufficient mold rigidity;2、Bulge due to injection pressure of the mold expansion. The cavity expands somewhat due to the injection pressure，If it is restored in the mold，However, in fact, the pressure in the mold remains high to cool and cure the product，When the mold is restored to its original state, a great force is exerted on the mold，Makes the mold have to open a little bit。 solution： immediately：Manage the exit pressure，Do not rise above the value that should be set。 perennial：Settings
2015-03-19 Reading quantity 2841
introduction： Through 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。]Failure and deterioration，Performance state parameters to judge and predict bearing reliability and performance，On the part of the anomaly，Cause and risk level to identify and judge，Comprehensive techniques that determine repair and improvement methods。therefore，Bearing fault diagnosis technology is not simple
2015-03-19 Reading quantity 1443
introduction：Applicable model： hammer41-65，C41-150（M412），231311，150-1-1，C41-250（M413）231331，C41-400（M415），231332，MA417，231341。 one、Conscientiously implement《General operating rules for forging equipment》Relevant provisions。 two、Conscientiously implement the following supplementary provisions： （one）Work hard before you start： 1、Inspection stand、Anvil block、Chopping block、Piston, etc. should be intact without cracks。The wedge iron is tight and firm。No major misalignment of the upper and lower cutting blocks。Lower anvil face to
2015-03-19 Reading quantity 2871
introduction： 1、Working principle：There is a drive shaft and four driven shafts on the plane of the frame to hold up the screen box，The rotating crankshaft drives the screen box to rotate。Forming a multi-directional penetration force。Roll the material over the screen，Move。A mesh plate and a pinball are arranged between each layer of mesh frame and the flow plate，Avoid mesh clogging。The mesh frame and the flow plate in the screen box are beveled relative to the plane，Guide the movement direction of screening materials，coarsen、Fine materials automatically flow into the lower mesh surface or automatically discharge。 2、Machine characteristics： 1、stand-alone/Large hourly processing capacity，20Orders,-40Orders,，Can be screened per hour15
2015-03-19 Reading quantity 2787
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