By Daizhong Su, Kai Xue, Shifan Zhu
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Extra resources for Advanced Design and Manufacture IV (Key Engineering Materials)
And the opening of the air inlet has little effect on the feasibility of the design. Therefore, we can ignore it as well. According to the mechanical analysis of the control pin, the rate equation of the fire-extinguish bomb firing process can be Fig. 3 A sketch map of stress on the control pin deduced. During the firing process, the accompanying tube and the fire-extinguish projectile move forward under the action of propulsive force which is large enough. 3. As the pressure angle β and the friction coefficient are both small enough, we can treat the fire-extinguish bomb and the accompanying tube as a whole ignoring the effect of the pressure angle β, the frictions Fbf and Faf when we calculate and build up the equations of the fire-extinguish projectile motion.
3. As the pressure angle β and the friction coefficient are both small enough, we can treat the fire-extinguish bomb and the accompanying tube as a whole ignoring the effect of the pressure angle β, the frictions Fbf and Faf when we calculate and build up the equations of the fire-extinguish projectile motion. Key Engineering Materials Vol. t . a x = x . （1） ( M + M ) d b Fa = Px ⋅ S d − a x M d Where: “f” is the friction coefficient; “Sb” is the cross-sectional area of the accompanying barrel; “α” is the pressure angle of the fire-extinguish projectile; “Fd” is the friction between the accompanying tube and the inner wall of the barrel.
5. 6. 3 bearing. The heat produced by friction raised the temperature of bearing. The more severe bearing wear, its temperature becomes higher . 4. The curve shows that at the stable working stage with good lubrication, the temperature is low and stable. 5℃. 44×106 , the MoS2 solid lubricant film is observed to be failure. 6. 05N•cm. At the moment, the bearing enters into the sharp wear stage, and the MoS2 solid lubricant film is to be failure. 2 N•cm. The temperature and the pressure are collected by the digital display meter, and the data is collected every 10 minutes.