 Posted: Tue 2:05, 21 Dec 2010 Post subject: ugg prezzo No power off valve butterfly valve auto |
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Butterfly valve off the valve without power starting torque design of automatic loading device instantly To withstand the corrosive media and also to withstand erosion alternating medium and the spring load,air jordans, it must accurately determine the working conditions under the stress condition,ugg milano, reasonable choice of plastic types, clear the bearing strength and corrosion resistance and other physical and mechanical properties, and to design reliable The structural components. Size determination of diaphragm diaphragm diaphragm can refer to general formula,air jordan shoes cheap, but subject to appropriate amendments to the rubber diaphragm, and its thickness can be calculated as follows: d = ro + CK1 (2) where c - constant, m, generally the C = 3-5 Ⅱ Ⅱ Vo1.29, No. 3,2001 FLUIDMACHINERY Shu - correction coefficient,ed hardy clothing, Kl <1r. - Effective action radius, mmrn = D - diaphragm diameter, one said - the parameter, B = DN / 8 + clD a loading device interface path, Ⅲ cI - constant, Ⅲ, generally take c1 = 6 ~ 8ran3 .2 spring Spring is the device automatically when the pump stops off valves, instantaneous load power source, the energy from the diaphragm pump pressure during normal operation (when the device when installed vertically), on the move to promote the spring deformation, when normal pump stops pumping or accident media in the valve when the pressure dropped rapidly, storage spring downward, pulling off the valve lever assembly to complete the initial off valve function. Spring work load can be determined as follows: F: (kN) (3) where the initial hydrazine plant _ a close valve friction torque, kN ・ Illr - valve shaft arm, mn - reduced travel times lifting hoist Shu - coefficient of efficiency - coefficient of working conditions for non-powered butterfly valve, the hammer weight torque and torque of the disc should be regarded as the main initial Moment off valve, while the shaft is off the friction torque valve resistance moment, in product design, close the valve more than Moment of friction moment. But the operation and practice, the friction torque often increased over time, so the spring to determine the workload off valve should be the initial friction torque as the main basis for design. Spring deformation energy, but must be controlled in this device allows the spring diaphragm is less than the maximum permitted height adjustment deformation of f, namely: 1 '<t = DN (4) where D Ⅳ _ path of a load device interface, a The initial compression of the spring can be adjusted by adjusting the control pressure on the plate and pre-set distance between the plates. The above parameters DN, d,,, r other, interrelated constraints must be taken into account in the design, carefully calculated to get satisfactory results. The method according to the loading device design and manufacture of the experiment showed that good performance by the Chinese State Intellectual Property Office has granted patent rights. Patent Number: ZL97241966.7. Introduction of the Yu Qu Yan Bin, female, born in 1964, assistant engineer, engaged in the design of fluid machinery. Designed products by the Chinese patent two, the fifth disc, Shanghai Science and Technology Fair Award two, a third prize of Shanghai Outstanding New Product, is the annual Economic and Trade Commission approval for the 20OO a national key new products. Address: Shanghai Jinshan Petrochemical, Shanghai Jingyi 9I Machinery Manufacturing Co., Ltd. (Continued from page 35) 5 Conclusion mechanical seal CAD system in June 1996 to complete the design and development work began in March 1997 to upgrade, and in 1997 l8 day in June was held in Hefei, mechanical seals CAD Systems Conference. During the meeting, experts, representatives of the software system to give a high rating, agreed that: (1) With the development of technology, design methods should be updated, the application CAD is age, the production plant to improve the design level, the means necessary for efficiency. (2) the successful development of the system, the development of CAD for the mechanical seal with a good head, played a role in promoting technological progress. (3) friendly software interface, fault-tolerant ability, easy to use, intuitive tips for persons not familiar with computer use. (4) software is more practical, designed for the sealing industry, easy to learn, as the \(5) system was open, sealed design provides both an example and provide a good platform for future product development of the plant provides an interface, a good follow-up means. Mechanical seal mechanical CAD system, the Department also received a number of experts and professors Information Centre CAD consideration and recognition. Through the development and use of the system, many people feel deeply that the seal design CAD technology in the sealing industry in need. To make the software better used in mechanical sealing industry, we will further strengthen the software system functions to enable a more complete mechanical seal CAD system to play a better social benefits. Ashamed by Lei Kai: He Yujie, male, born in 1962, the University, senior engineer. Address: 230031, mayor of Taiwan Fertilizer Anhui Jiangxi Road 888, Taiwan Fertilizer Institute of General Machine maple. 相关的主题文章： ugg italia Refrigerator port noise control measure ed hardy clothing Enzyme membrane reactor Present and Future _2315 ugg prezzo Low specific speed centrifugal pump impeller shape and the integratio |
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