附件24.3 5-2 When 2x10'kPa is imposed across the pressure and return ports of a valve and when the two cylinder (no load),25.74L/min will flow through the valve.If the same valve was which could be delivered to the load 5-3 How to determine the input pressure when a non-return valve starts to work?The open pressure is 0.04MPa. 5-4 Can we use a two-way,three-ported directional control valve instead of a two-way,four-ported one? ti r avthe linder even when soed Y actuated,analyze the reasons and propose some improvement measures. 世☒当 = problem5-5 5-For a pilot operated relief valve,in which the damping hole on the main valve is blocked up by dirties. what possible barriers may occur?Why? 5-7 When the pre-compression of pressure-adjusting spring in a relief valve is constant,why will the inlet pressure fluctuate with the lowrate? 5-8 What does the outlet pressure of the pressure-reducing valve base upon?What are the conditions needed to make the ure c onstant? 5-9Two internally piloted outfow sequence valves XF1 and XF2 are installed inline in a same oil path XFI is in front of XF2.and the setting pressure of XFI is 10MPa.while the setting pressure of XF2 ranges from 5MPa to 15MPa.How would the inlet pressure of XFI change with the pressure of XF2?At which state the valve would be? 5-10 Compare the relief valves,pressu ing valves and the sequence valves(intemally piloted 5-11 If the flow rate through the throttle valve is constant,change the openings of the throttle valve, which parameters would change and how? 5-12 If the inlet and outlet ports of a speed regulation valve are installed inversely.will the speed regulation valve still work normally?Why? 5-13 When the speed regulation valve is installed in the o ret path or the bypass oil path,why can we use common fixed displacement pressure-reducing valve or throttle valve? 5-14 Why cannot a bypass speed regulation valve regulate the oil speed for the oil return path? Chapter 6 6-1 An is used as the power soure whose volume is 4Land the pressure of filled air is 3.2MPa.The highest and lowest working pressures of this system are 8MPa and 5MPa respectively,what is the 附件 24.3 5-2 When 2×104 kPa is imposed across the pressure and return ports of a valve and when the two cylinder ports are connected together (no load), 25.74L/min will flow through the valve. If the same valve was connected to a load and the same supply pressure was available, what is the maximum power which could be delivered to the load? 5-3 How to determine the input pressure when a non-return valve starts to work? The open pressure is 0.04MPa. 5-4 Can we use a two-way, three-ported directional control valve instead of a two-way, four-ported one? Draw a graphic symbol to illustrate it. 5-5 For an electro-hydraulic directional control valve, the cylinder is motionless even when solenoid Y is actuated, analyze the reasons and propose some improvement measures. problem 5-5 5-6 For a pilot operated relief valve, in which the damping hole on the main valve is blocked up by dirties, what possible barriers may occur? Why? 5-7 When the pre-compression of pressure-adjusting spring in a relief valve is constant, why will the inlet pressure fluctuate with the flow rate? 5-8 What does the outlet pressure of the pressure-reducing valve base upon? What are the conditions needed to make the outlet pressure constant? 5-9 Two internally piloted outflow sequence valves XF1 and XF2 are installed inline in a same oil path. XF1 is in front of XF2, and the setting pressure of XF1 is 10MPa, while the setting pressure of XF2 ranges from 5MPa to 15MPa. How would the inlet pressure of XF1 change with the pressure of XF2? At which state the valve would be? 5-10 Compare the relief valves, pressure-reducing valves and the sequence valves (internally piloted outflow type) and describe their differences and similarities. 5-11 If the flow rate through the throttle valve is constant, change the openings of the throttle valve, which parameters would change and how? 5-12 If the inlet and outlet ports of a speed regulation valve are installed inversely, will the speed regulation valve still work normally? Why? 5-13 When the speed regulation valve is installed in the oil return path or the bypass oil path, why can we use common fixed displacement pressure-reducing valve or throttle valve? 5-14 Why cannot a bypass speed regulation valve regulate the oil speed for the oil return path? Chapter 6 6-1 An accumulator is used as the power source, whose volume is 4L and the pressure of filled air is 3.2MPa. The highest and lowest working pressures of this system are 8MPa and 5MPa respectively, what is the