![]() The rule of thumb is that the total mass subject to acceleration is the mass of the balloon, all its appurtenances, and twice its volume of air. Solution: Make cut AA so that it just hits the bottom right corner of the element. Assume the lift is 3 floors, the maximum load is 10 passengers, and the maximum system pressure is $800 \mathrm ?$ For this, consider that both balloon and inside air have to be accelerated, as well as some of the surrounding air (to make way for the balloon). Find the shear and normal stresses on plane. Design the least expensive accumulator that can satisfy the system requirements. P3-90.The gate controls the flow of water over the ledge at B, where the gate is pressed by a spring.Determine the minimum spring force required to keep the gate closed when the water level rises to A at the upper edge of the gate. When the elevator descends, oil is returned to the accumulator. A 4-m-long quarter-circular gate of radius 3 m and of negligible weight is hinged about its upper edge A, as shown in Fig. Solution: Consider a 25-cm width of upper cylinder, as at right. If the end caps are neglected, compute the force in each bolt. 2.92 A 4-m-diameter water tank consists of two half-cylinders, each weighing 4.5 kN/m, bolted together as in Fig. Hydraulic oil, stored in an accumulator tank pressurized by air, is valved to the piston as needed to lift the elevator. The force in each of 6 bolts is 544088/6 or Fbolt 90700 N Ans. A hydropneumatic elevator consists of a piston-cylinder assembly to lift the elevator cab.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |