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introduction：Cooling tower fan is the core equipment of circulating water system，Look at the management of circulating water equipment，Both from the number of devices、Maintenance workload、In terms of power consumption and so on，Cooling tower fans have a large proportion。The number of fans accounts for the total amount of equipment in the workshop57％，Maintenance hours account for the total amount60％，Electricity consumption accounts for the total amount22％。How to save energy and reduce consumption、Ensure long cycle operation of equipment with less labor，The following is a brief description of the measures： 1、Cross-flow cooling tower should control the height from the top of the packing to the lower edge of the fan suction section equal to or greater than the diameter of the fan0.2times。 2、Countercurrent cooling tower
2015-03-26 Reading quantity 2892
introduction： Using visible light(380～760Nanometer wavelength)illumination﹐An instrument that enlarges the image of tiny objects。This enlarged image can be seen with the naked eye﹑Photography or detection with photocells and other receivers。 (See color diagram 19Mid-century microscope Optical microscope with automatic camera A scanning electron microscope with a field-firing gun﹐The resolution is20A Ultrahigh voltage transmission electron microscope﹐The acceleration voltage is up to speed2000kV R.Hooks in17Mid-century system
2015-03-26 Reading quantity 2808
introduction：As a new means to restore the performance of old construction machinery，The refurbishment gives the equipment a second life，The average working efficiency during the life of the equipment is effectively improved。however，Most construction machinery dealers and users in China do not have a clear concept of refurbishment，Many people even think“renovate”Its just another way of saying overhaul。In fact，A renovation is far different from a major overhaul，Its in the device selection、Factory inspection and other aspects have relatively strict standards，What is more important is that the refurbishment is in part a full factory performance restoration of the equipment，It is of higher quality as used equipment、Better performance。In an energy crunch
2015-03-26 Reading quantity 2784
introduction：With the development of modern industry，There are many new features and growth points in the development of metal materials。New features have emerged in the application of some traditional materials，Its processing and forming technology is also facing new problems。Copper is a traditional metal material，Copper tubing in recent years，Especially copper coils（Pipe with internal thread）The application of external fin tubes in the refrigeration and air conditioning industry has increased greatly。At present，Copper alloy tubing in navigation、The condensing pipe industry of power station is developing rapidly。Copper has a new growth point in the electronic device industry。Lead frame、ICsocket、Demand for miniature copper alloy devices has soared。 Magnesium is the sixth most abundant element on Earth，Reserves of our country
2015-03-26 Reading quantity 2797
introduction：Drill holes with various drill bits、Cutting of reaming or countersinking。The drilling is done with a twist drill、A flat drill or center drill is used to drill through or blind holes in solid materials。Reaming is the use of a reaming drill to enlarge the aperture of the prefabricated hole on the workpiece。Spot facing（figure1 [Spot facing]）Countersink drill is used to process countersink holes at one end of prefabricated holes、Taper hole、Local plane or sphere, etc，To install fasteners。There are two main ways to drill：①Work immobility，The bit rotates and feeds axially，This way is generally in the drill press、Boring machine、Applications on machining centers or combined machine tools；②Workpiece rotation，The drill is only used for axial feed，This way is generally in a lathe or deep hole
2015-03-26 Reading quantity 2812
introduction：Zhao student Hao Liqun （Liaoning Institute of Grain Science，110032） Abstract：Pass the actual test，The value-added problem of reducing the crushing rate of dryer system is discussed。 keyword：Drying machine；Process flow；Percentage of breakage introduction 2001years11month～2003years3month，We have a national reserve grain depot project for Liaoning Province45The drying production process of the national storage dryer system was investigated and the related technical performance was tested。Pass the test，It is necessary to consider the current commonly used drying production process flow
2015-03-26 Reading quantity 2795
introduction：1.3Overview of oil system of No. 1 turbine unit Jiaozuo power plant3The No. 1 engine is produced by Dongfang Steam Turbine FactoryN200-130/535/535V turbine，in1999The flow section was reformed and the regulating system was carried outDEHtransform。The original design of the oil system uses a traditional spindle DC driven main oil pump－Oil injector system，The oil for regulating the security system is supplied directly from the main oil pump，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 are opposite each other on the shaft
2015-03-26 Reading quantity 1543
introduction： 1.High carbon chromium steel Common imported 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 steel is high carbon chromium steel，Its characteristic is that it can be quenched from the surface to the coreHRC58～66Such a high hardness range，It is also called fully hardened steel。This steel is cheap，It is the most widely used in the world。This steel is divided into chromium steel、Chrome-molybdenum steel、Chromium manganese silicon steel and chromium manganese molybdenum steel four categories，Since the60Date to70age
2015-03-26 Reading quantity 1443
introduction： ——Delcamthe“In-machine detection”（OMV）solution DelcamAs an earlier focus on processing and testingCAMSoftware suppliers have their own unique understanding of CNC machining in machine inspection technology，What is introduced in this article is based onDelcamThe solution of in-machine inspection。DelcamcorporatePowerINSPECT OMVThe software runs independently of the measurement hardware。DelcamCompany nameCMMAnd measuring equipment manufacturers，BritainRenishawThe company maintains a good partnership，Around the world
2015-03-26 Reading quantity 2876
introduction：In the aviation industry，The performance of hydraulic system directly affects the safety of aircraft and the lives of passengers，The hydraulic pump is the power source of the hydraulic system，Therefore, the state monitoring and fault diagnosis of hydraulic pump is particularly important。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 is a common failure mode of hydraulic pump
2015-03-26 Reading quantity 1547
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