Figure 4-52 F+y AWV ALLV * C(Capacitance) R (Resistance)
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- Q.5- Consider the liquid-level control system shown in Figure below. assume that the velocity of the power piston (valve) is proportional to pilot-valve displacement x, dy/dt = K₁ x or where K, is a positive constant. We also assume that the change in the inflow rate q, is negatively proportional to the change in the valve opening y, q₁ = -Kvy or Assuming the following numerical values for the system, C=2 m², R= 0.5 sec/m², K, 1 m²/ sec. K₁=4 sec¹ a=0.25 m, b= 0.75 m, Obtain the transfer function H(s)/Qg(s). 3 0.. 1. t CC ReIn the liquid-level system of Figure 4-27 assume that the outflow rate Q m /sec through the out- flow valve is related to the head H m by Q = KVH = 0.01VH Assume also that when the inflow rate Q, is 0.015 m³/sec the head stays constant. For t 0. Find the time necessary to empty the tank to half the original head. The capacitance C of the tank is 2 m2. H Capacitance CQ6. Hydraulic cylinder Rocking lever Pressure valve Operative element 状 Direction- control valve -Throttle Gear pump Analyze the diagram above. Some of the drives system of the figure above has its own depreciation on its efficiencies as the lifecycle progress. State one of the reasons of why the efficiency drop on and explain any method that can increase this efficiency especially on the directional control valve.
- Q.5- Consider the liquid-level control system shown in Figure below. assume that the velocity of the power piston (valve) is proportional to pilot-valve displacement x, dy/dt = K₁ X where K₁ is a positive constant. We also assume that the change in the inflow rate q; is negatively proportional to the change in the valve opening y, Q₁ = -Kv y Assuming the following numerical values for the system, C=2 m², R= 0.5 sec/m², K₁=1 m²/ sec K₁=4 sec-¹ or or a=0.25 m, b= 0.75 m, Obtain the transfer function H(s)/Qd(s). 0.01 n.h ANV L= C(Capacitance) R (Resistance)Homecwor K Q: For the hg draulic sys tem as shown in Fig. Find: 1) The relation between X and q, Ps and the Corres Pondling block diagram eg The relation between of 8y and the Grresponding Valve dingram block supply 3, The relation between y and Pess Pording block dingram- 4-The overall block diagrams -f the system. and the Corres Cylinder infut o utRut Q: Ahydraulic servomotor system is shown in Figure, Determine the overall block diagram of the system. a1. Pressure gauge the hydraulic cycle in figure -consist of:7 5 6 X LB ww M 3 Feed direction & tank O accumalator O intensifier O 3 way 2 position control valve O
- 2 Pressure gauge 7 the hydraulic cycle in figure -consist of:5 5 X LB IX www. M 3 Feed direction 8 intensfier O accumlator O pump O hydraulic motor OThe figure Q.19 show the type of valve is commonly employed in steering system at automobile. In this spool valve, the spool is grooved and slides in and out of position within the sleeve, alternately blocking and opening the fluid intake and outtake portals. Standard port labelling convention on hydraulic valves are P and T stands for Spool Feedback spring P, T T P, A B SleeveQ.3 Refer to the valve timing diagram. Calculate the total duration of inlet and exhaust valve openings. Inlet Exhaust Q.4 With reference to the valve timing diagram, suggest how to improve volumetric efficiency of the combustion process (e.g. for competition use). Q.5 An internal combustion engine produces torque and power. State definition of both terms and show equations used for mathematical calculations. Torque Power
- give the a) A turbine connected to an electric generator through a gearbox can be modelled as illustrated in Figure 1 = 951 kgm² J2 = 950 kgm² equivalent inertias of the rotary system. The shafts provide a stiffness of k1 = 9.9x10¹Nm/Rad k2 = 4.9x106Nm/Rad spectively. The letters in the parameters represent digits of student numbers: A is the third digit, B is the fifth digit, D is the sixth digit, and F is the seventh digit. i) Draw free-body diagrams ii) Write the equations and put them in matrix form iii) Calculate the dynamic stiffness values iv) Find the natural frequencies and draw mode shapes of the system v) Discuss the effect of coupling stiffness k₁₂ on the natural frequencies k₁₁ 01 k12 O Figure Q2.Direction: •Show unit cancellations and do not use shift solve.•Show your complete solution with this format: Given, Required, Solution. •Use 4 decimal place for answers. Question: A 6-stage-double-suction cetrifugal pump discharges 71 kg/s of oil (SG=0.75) at 1750 rpm with pressure drop of 525 psi. Find the specific speed in rpm. Subject: Fluid MachineriesCourse: Mechanical Engineering2.State the operation principle of positive displacement pump according to the following figure 6 7 HAA DC 5 4 3 2 1.cam 2.piston 3.spring 4.chamber 5.check valve W the