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introduction： Flexible impeller pumps have many advantages over centrifugal pumps in handling viscous fluids。A pioneer in flexible impeller technologyJabscocorporateMartin RuseIn this paper, the basic principle of flexible impeller pump and its installation are discussed、Many advantages in maintenance and use。 Positive displacement pumps such as flexible impeller pumps are used as an alternative to centrifugal pumps in many industrial applications。Flexible impeller pump at approx60JiayuJabscocorporation（Now its momentum and flow controlITTPart of an industrial conglomerate）invent，It is compared with a centrifugal pump
2015-01-11 Reading quantity 2808
introduction：At present, the valves commonly used in the production of various industries in China are metal valves，The use of metal valves has a history of hundreds of years，In the meantime, although the structure and materials have been improved，However, it is limited by the metal materials own conditions，Increasingly unable to adapt to high wear and tear、Strong corrosion and other harsh conditions。Mainly reflected in the short service life，The leakage seriously affects the stability of system operation。Traditional metal valves are urgently needed from materials、Radical changes in design and manufacturing processes。Advanced ceramic materials as new materials in the 21st century，It has been paid more and more attention by more and more scientists，The application of it to industrial valves is a bold and have
2015-01-11 Reading quantity 2903
introduction： 3、5In order to makePLCThe system runs safely and reliably，Various protective measures were taken，For example, it is grounded separately from the strong current devices in the system，The cross-sectional area of the ground cable is greater than2Square millimeter。PLCThe input and output inductive loads are in parallel with continuous current diodes，To eliminate input contacts when disconnected，The inductive load interferes with the system by generating arc several times or even tens of times higher than the power supply voltage due to the effect of energy storage。See picture（3）。 3、6The input part of the system36point，
2015-01-11 Reading quantity 2982
introduction：1、Rolling bearings with low noise requirements[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。]There are：In the standard bearings produced in our country，Some single-row radial ball bearings and short cylindrical roller bearings have low noise varieties for motor bearings。Which ball bearing from inside diameterφ2.5mmtoφ60mmThere are several varieties of beltsZl、Z2andZ3
2015-01-11 Reading quantity 1568
introduction：Common term for reducer Full-load efficiency：At maximum load（Failure stop output torque），Transmission efficiency of reducer。 Working life：Reducer under rated load，Cumulative working time at rated input speed。 Rated torque：It is the torque allowed for a long running time during the rated life。When the output speed is100turn/points，The life of the reducer is the average life，Above this value, the average life of the reducer will be reduced。When the output torque is more than twice, the reducer fails。 noise：Unit decibeldB（A），This value is the input speed3000turn/points，Not carry
2015-01-11 Reading quantity 2924
introduction： Standard number Standard Chinese name Standard English name GB/T13008-1991 Mixed-flow pump、Technical conditions of axial flow pump Technical specifications for mixed and axial flow pum
2015-01-11 Reading quantity 2919
introduction：1、IKOBearing bearing eccentric load General thin wall 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。]Both are used to carry axial and radial loads,Its ability to carry eccentric loads is very limited。If an eccentric load is applied to these bearings,It will cause unreasonable load distribution inside the bearing,Thus drastically reducedIK
2015-01-11 Reading quantity 1561
introduction：Because the mechanical polishing is mainly completed by hand，Therefore, polishing technology is still the main reason for affecting the quality of polishing。besides，Also with mold material、The condition of the surface before polishing、Heat treatment process and so on。High quality steel is a prerequisite for good polishing quality，If the surface hardness of the steel is uneven or the characteristics are different，Often produces polishing difficulties。Various inclusions and pores in steel are not conducive to polishing。 1 Influence of different hardness on polishing process Increasing hardness makes grinding more difficult，But the roughness decreases after polishing。Due to the increase in hardness，The polishing time required to achieve low roughness
2015-01-11 Reading quantity 1577
introduction：1.racewayraceway Rolling 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。]The surface of the load bearing part，A rolling track used as a rolling element。 2.Straight racewaystraightraceway drooping
2015-01-11 Reading quantity 1522
introduction： 1.Speed and temperature rise With the development of science and technology，The spindle speed of machine tool is getting higher and higher，The range of speed changes is getting wider，therefore，rightIKOBearing high-speed running stability requirements are also getting higher and higher。Machine tool spindle 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。]Temperature rise is an important factor limiting bearing speed。Common feeling
2015-01-11 Reading quantity 1601
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