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condensate pump ball bearing main shaft bearing main turbine bearing diesel engine wrist pin bearing
changing the angle of the tilting plate changing the speed of the pump moving the slide block and rotor moving the shaft trunnion block
（1） only （2） only （1） and （2） （1）,（2） and （3）
maintain radial alignment between the pump impeller and casing absorb all impeller shaft end thrust prevent water leakage to the atmosphere prevent wear of the pump casing and/or impeller
permanent loss of pump suction worn shaft seals high level in the oil sump low motor RPM
Surrounding the fixed shaft is a hollow shaft This hollow shaft carries radial bores Each bore is fitted with a well-lapped plunger There are always even numbers of bores
closed discharge valve broken pipe line worn shaft both A and B
shaft and impeller motor and pump shaft casing and impeller wearing rings lantern ring and impeller
have a greater head capacity operate with increased impeller efficiency discharge through the suction side of the pump casing require more power to run the shaft
The pistons reciprocate The ‘B’ end cylinder barrel rotates There is no fluid flow Power is transmitted hydraulically
loss of suction in the circulating pump leak in the primary cooling system broken raw water pump shaft burned or cracked piston in one cylinder
worn gland sealing shaft worn wearing rings a bent shaft reversed pump coupling
Fire pump and lube oil pump Lube oil pump and distilling plant Distilling plant and shaft alley door Shaft alley door and fixed CO2 release
Main circulator pump jacket water cooling Salt water service pump Auxiliary condensate pump Bilge pump
radially from the shaft parallel to each other and to the shaft parallel to each other but at a right angle to the shaft at an angle to each other and to the shaft
theS.W outboard valves the tailshaftL.O stop valve the drain valve of the boiler propeller shaft sealing device
They make it easier to replace the pump shaft packing They can be economically replaced as they wear out They can be removed when it is necessary to lighten the weight of the pump They increase the strength of the shaft
the mechanical seal packed stuffing boxes either A or B neither A nor B
Variable volumes can be obtained with gear pumps only by variation of the pump drivespeed A radial piston pump houses sliding pistons in a stationary cylinder block throughwhich passes a rotating pintle or ported shaft The amount of fluid displaced per revolution of an axial piston rotary pump is dependenton the angle formed between the cylinder block and valve plate All of the above
primarily to lubricate the shaft seals due to the inability of this type of pump to lift water to cover the suction （eye）of the impeller to initially unload the pump by having its head pressure equal to discharge pressure in order to overcome the potential energy of water in the discharge line
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