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The piston rod may be solid but in some cases hollow rods are used as a means of getting
cooling water or lube oil into and out of the piston. The upper end is formed into a flange for
bolting to the upper side of the piston.
Pistons in general may be divided into trunk and crosshead types.
A typical trunk piston length is slightly more than twice its diameter. The reason is that
the piston is required to perform two major functions: to form a gas-tight and movable cylinder
end and to transmit side thrust to the stationary part of the engine structure.
For the 2-cycle, crosshead type engine the piston is usually made in two parts: the prison
proper and the skirt. The use of a long skirt on the piston is necessary to keep the exhaust and
scavenging ports closed when the piston is in the upper part of the cylinder.
Pistons are cooled by oil or water and for this purpose the upper part of the prison is
made in the form of a closed box. In the case of oil cooling the lubricating oil is used.
If water cooling is used or if the piston cooling oil is kept separate from the bearing oil,
the cooling fluid is led into the piston through a telescopic or knuckle jointed pipe.
Vocabulary
open hearth steel мартеновская сталь
customary = commonly
to build up составлять, собирать
web мотылевая щека (плечо мотыля)
crank pin шейка мотыля
solid зд. целиком
to bore растачивать, сверлить
shrink (shrunk, shrunk) насаживать в горячем состоянии
(на «горячо»)
rectangular прямоугольный
foot нижняя часть, пята, опора
crank pin box мотылевый подшибник
taper сужаться
forked out мотылевый подшипник
crosshead pin box головной, крейцкопфный
подшипник
to drill сверлить
to afford обеспечить, предоставлять, давать
wrist pin цапфа, палец крейцкопфа
projecting выступающий
fore side (носовая) передняя часть
alt side (кормовая) задняя часть
cast steel литая сталь
shipper ползун, башмак
to secure крепить, закреплять
stud шпилька
hollow полый, пустотелый
as a means of как средство для
lube oil = lubricating oil
flange фланец
trunk piston тронковый поршень
to perform выполнять, осуществлять
gas tight газонепроницаемый, герметичный
movable подвижный
8
The piston rod may be solid but in some cases hollow rods are used as a means of getting cooling water or lube oil into and out of the piston. The upper end is formed into a flange for bolting to the upper side of the piston. Pistons in general may be divided into trunk and crosshead types. A typical trunk piston length is slightly more than twice its diameter. The reason is that the piston is required to perform two major functions: to form a gas-tight and movable cylinder end and to transmit side thrust to the stationary part of the engine structure. For the 2-cycle, crosshead type engine the piston is usually made in two parts: the prison proper and the skirt. The use of a long skirt on the piston is necessary to keep the exhaust and scavenging ports closed when the piston is in the upper part of the cylinder. Pistons are cooled by oil or water and for this purpose the upper part of the prison is made in the form of a closed box. In the case of oil cooling the lubricating oil is used. If water cooling is used or if the piston cooling oil is kept separate from the bearing oil, the cooling fluid is led into the piston through a telescopic or knuckle jointed pipe. Vocabulary open hearth steel мартеновская сталь customary = commonly to build up составлять, собирать web мотылевая щека (плечо мотыля) crank pin шейка мотыля solid зд. целиком to bore растачивать, сверлить shrink (shrunk, shrunk) насаживать в горячем состоянии (на «горячо») rectangular прямоугольный foot нижняя часть, пята, опора crank pin box мотылевый подшибник taper сужаться forked out мотылевый подшипник crosshead pin box головной, крейцкопфный подшипник to drill сверлить to afford обеспечить, предоставлять, давать wrist pin цапфа, палец крейцкопфа projecting выступающий fore side (носовая) передняя часть alt side (кормовая) задняя часть cast steel литая сталь shipper ползун, башмак to secure крепить, закреплять stud шпилька hollow полый, пустотелый as a means of как средство для lube oil = lubricating oil flange фланец trunk piston тронковый поршень to perform выполнять, осуществлять gas tight газонепроницаемый, герметичный movable подвижный 8
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