Hydraulics control

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Uploaded: 20.10.2016
Content: Вариант №4+.pdf (513,22 kB)

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Valid task on hydraulics In-4 Moscow State Construction University

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Task 1. In the lateral vertical wall of the reservoir is a rectangular hole with dimensions a and b overlap the flat shield is pivotally forth the top side of the horizontal axis around which it can rotate counterclockwise (Fig. 1). You want to determine the weight of the load G on the end of a lever of length l, rigidly attached to the shield, which would allow the shield to open when the water in the tank level N.
Task 2. In the flat vertical wall of the tank is filled with water, there is a rectangular opening with a height a and a width b and a continuous semi-cylindrical cover AVS (Fig. 2). The upper edge of the hole is at a depth H below the water level in the tank. Determine the magnitude and line of action of the force of excessive hydrostatic pressure acting on the cylindrical surface of the cover AVS.
Task 3. From an open tank in which is maintained a constant level, a steel pipe (equivalent roughness Ke=0.1 mm) consisting of pipes of different diameters d and different lengths l, flows in the atmosphere of water, which flow Q, temperature t (Fig. 3).
Task 4. Horizontal piping of steel pipes, has a plot with a parallel connection of pipes, consisting of two lines l1 and l2, diameter d1 and d2. At points b, C and D set the water flow Q, QA and QD.
Required:
1. Install the pipe diameters on the sections AB and CD at marginal costs.
2. To determine the distribution of costs for 1-d and 2-th lines of parallel piping.
3. To determine the required pressure at point A to ensure the specified costs Q, Qc and QD when given a free head (the excess piezometric line above the ground) at the end of the pipeline NSV, if you know the lengths of segments AB and CD.
4. To construct the piezometric line along the length of the pipeline.
Task 5. To determine the consumption of water Q passing through the water outlet pipe in the concrete dam if: the pressure over the center of the pipe N, pipe diameter d, length l on her. (Fig. 6)

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