The paper introduces the whole course of optimization design of ZF3-126/T Gas insulated metal-enclosed switchgear and describes the improvement in structural design,enhancement of technical parameters,reduction of overall dimensions,boost of reliabilities,test results on all round type tests.
The waterpump bearings with shaftare widely appliedto cooling pump ofautomobile engine and other machineries because of their advantages such as small overall dimensions, compact structure ,convenient mounting and low cost.
A carbon fibre framework with overall dimensions of 1 200 mm×790 mm×695 mm and mass of 41 kg has been designed and fabricated, and subjected to both sine and random vibration tests. The results show that the carbon fibre framework can withstand an acceleration of 20.4 g.
Taking the crankshafts of the X135, 495 and S195 diesel engines as the chief test pieces for reference, the authors place emphasis on the introduction of the calculating method and program of the overall dimensions of the pendulums (including counter balance) and the oscillator, together with a brief indication of the main construction and the working principles of this machine.
The test results of tire performance showed that the nominal speed of optimized tire reached 360 km·h -1 ,and its critical speed reached 380 km·h -1 ; the overall dimensions,strength,tightness and water pressure explosion met the requirements in national military standards.
The result showed that the light truck tire made with high count 1400dtex/2 nylon 6 cord featured stable inflated overall dimensions and improved speed and endurance properties; and the cost of each tire reduced by 2.24～3.22 RMB yuan.
A small superconducting magnet made form the tapes, which has overall dimensions of 85mm outer diameter, 10mm clear bore and 60mm height, has generated fields of 1. 04T and 0. 13T at 4. 2K and 77K, respectively.
The back wallboard iron casting of a YJ231 plug assembler is made of HT200, its total weight is 200 kg, and its overall dimensions are 1 102 mm in length ,962 mm in width and 34 mm in height. It is required that the dry sand mould has a high surface quality, and the six surfaces should be machined.
The case of ring rolling mill is made of HT 250,the total weight is 9 500 kg,and the overall dimensions are 4 100 mm in length,2 500 mm in width and 577 in height. The mould is made using dry clay bonded sand and the as-cast iron is melted in cupola.