Aircraft Hydraulic And Pneumatic Systems Engineering Essay

expressioncraft Hydraulic And pneumatic Systems Engineering EssayThis report represents investigation and analyzes stemmabus A318 pneumatic arranging. On the different communicate, argumentcraft pneumatic forms go away be lay-out in this report. The sources of supply in this system both main and secondary impart also be mention. The shoemakers last is the twitch and temperature overlook in this system will be analysed.The innovation of this report is to analyzing Airbus A318 pneumatic systems and the lam of pneumatic systems in Airbus A318.The function pneumatic system is apply to stand High pres for sure (HP) for expression-conditioning, pressurization, pressurization and anti-icing. Engine phlebotomise, APU and international ground service are utilise to produce HP.The railway locomotive exhaust course is the dividing line taken within the engine compression peak when mechanical press and temperature regulated prior. High Pressure Compressor (HPC) stages, intermediate Pressure (IP) stages and HP stages are the place where the transmit is bled.When the engine in low position condition, the High Pressure Bleed Valve (HPV) will function and supply air to the systems. But, when the press in view the IP die hard is sufficient, HPV will closes.HP Valve (HP VLV)HP VLV is switch ON when the IP stage is no enough pressure for pneumatically systems (when engine at low speed). The pressure supply is surrounded by 8 to 36 psi. HP VLV is force to close when PRV is closed because HP VLV pressure should no more than PRV pressure. If the sense line over the limitation, the system will over pressure and cause malfunction.The function of Bleed supervise Computer (BMC) is to maintain HP VLV closed during the pip.The HP VLV solenoid will progressive by BMC whenThe engine is greater than Idle and pressure is over 80psi.When the propagation Anti Ice (WAI) is OFF conditionThe altitude is over 15,000 feetThe direct configuration is act normal.Whe n solenoid is de-energized, this mean the HP VLV will pass around. This condition is restrained.IP check valveIP check valve is used to prevent the air execute in the anti-direction. When the HP VLV opens, IP check valve will make sure hit air at IP stage wouldnt flow posterior to the engine.Pressure Regulating Valve (PRV)The purpose PRV is used to maintain the bleed pressure between 44 psi. Thermal fuse is used to causes the PRV to close when the engines chemise temperature was around 450C.Control Solenoid (CTL SOL)The CTL SOL is located downstream from the precooler. The purpose is to envision PRV pressure will going to bleed out. These systems are operated by pneumatic and electric.The CTL solenoid will energize by BMC whenOver temperature of the precoolerOver pressure of the PRV disclose detection surrounding areaAPU bleed valve not close appetizer Valve not closedOverpressure Valve (OPV)This valve is normally open condition, close when pressure is put one across on this v alve. This valve closes at 75psi and fully closed at 85. It will open around 35psi.Regulated PressureIt is act as a transducer. It is committed to both BMCs and analyzes the pressure from PRV.Transferred PressureThis component is also same function as regulated pressure. But it is used to read from HPV and PRV.Fan Air Valve (FAV)It is used to control the fan airflow to the precooler and maintain bleed air temperature at 200C.FAV Control Thermostat (CTL THERMST)Act as extraneous servo-control. It is located downstream from the precooler.Heat Exchanger (Precooler)It is used to reduce the temperature engine bleed air.Heat Exchanger Outlet Temperature SensorThis component is connected to both BMCs. It is use to control temperature downstream from the precooler.APU Bleed/ External AirAPU is used to bleed air supply for air- conditional and engine absorb when the aircraft was on the ground. On the other muckle, APU also use to provide galvanising power to supply the electric systems. APU bleed act as a backup power for both systems. The both bleed systems are fond regard together by a cross bleed duct.External air also can be use during in flight, depend on the high of the aircraft. When in flight, the APU bleed supply only supplied by the left-hand(a)(p) hand side of the cross bleed duct.APU bleedAPU bleed valve is used to supply APU is running. The valve is operated by galvanisingly by the Electrical Control boxwood (ECB) solenoid and pneumatic. When air pressure and electrical power are unavailability, valves spring -loaded will shut off.Electrical Control Box (ECB)It is use to monitor the pressure and closes or opens the APU bleed valve.X-Bleed SystemThe function of X-Bleed system is to interconnection of left and right bleed air are system. In the systems, it consists of shut-off valve operated by electrical two DC motors. Primary motor will function in AUTO mode. The position of the shut off valve is controlled by the (BMC) according to the APU bleed c onfiguration. Secondary motor will be used to over get the hang the AUTO mode. The position of the valve is manipulated by X-bleed selector.Ground Air SupplyIt is used so supply air by a ground air pressure and connected to the HP ground connector. When ground air cart is connected, only the left hand side of the bleed systems has supply. Left hand side and right hand side bleed system will feed with ground air supply when X-bleed valve selector will be select in the OPEN position.Untitled.jpgSYSTEMS OVERVIEW ENGINE BLEED APU BLEED/ foreign AIR(From MAINTENANCE COURSE BOOK T1 (CFM56-5B/ME Title Pneumatic Level) pageboy 3ConclusionAirbus A318 pneumatic systems are supply by engine bleed, APU and the Ground air supply. Engine bleed are used provide air pressure when aircraft engine is low power condition. The pressure is control by the HP valve. After the pressure inside the IP bleed is sufficient, high pressure valve (HPV) will shut down.APU is used as standby pneumatic system . It is used to provide electrical power to function the electrical and environment systems. It is used when the aircraft on the ground. APU also used when in flight condition depending on the altitude of the aircraft.It is used so supply air by a ground air cart and connected with HP ground connector. Air only was supply to left hand side of bleed system. So, crossbleed valve will use to feed the air systems to the right hand side of the bleed system.