Составители:
Рубрика:
5. В течение некоторого времени оба клапана бывают открыты одновременно с це-
лью 6. продувки камеры сгорания.
VIII. Answer the questions to the text.
1. How has this engine output been increased?
2. What reduces the engine length?
3. What fuel can the engine operate?
4. What valves does the cylinder head carry?
5. What helps to reduce overhaul time?
6. Who is engine maker?
IX. Look through the text again and pick out the main sentences.
Lesson 21A
To be read without dictionary and rendered in English
Sweden Ships with MAK
Sweden has joined the group of countries having «super tugs». The owners Neptun
Transport & Marine Service AO, Stockholm, specified MAK main engines for the vessel and
its following sister-ships.
Four MAK diesel, Type 8M453AK with a combined output of 23,000 bhp act with
150 rpm on the two screws of the «VLT» (Very Large Tug) to give it a free-running speed of
17 knots. The ship can stay at sea for 35 days without refueling.
Maximum reliability with minimum expenditure was the basic of design for the machi-
nery installation.
The four main engines act in pairs on two propeller shafts through a reduction gear. Dri-
ven directly from the reduction gear are pumps for propeller manoeuvre, steering gear, towing
winch and shaft generator. The power and reliability of MAK engines make them an ideal choice
for tugs. They were again specified for two newest tugs. Each has a Type 8M453AK unit an out-
put of 4,200 hp at 600 rpm and driving through a reduction gear onto a controllable – pitch pro-
peller of 2.9 m diameter. At 3,000 brake horsepower the maximum speed is 14 knots, while fuel
consumption is 9.7 to 10.8 t; at the cruising speed of 12.5 knots it's about 7.2 t.
Answer the question:
What technical data has this engine?
Lesson 22
Mitsubishi's UEC 85/180 D Machine
The highest-powered low-speed crosshead-engine built by Mitsubishi Heavy Industries Ltd,
is the UEC 85/180 D type which is rated at 3,000 bhp/cylinder when operating at 118 rev/min.
This engine is a two-stroke, uniflow-scavenging, crosshead machine that obtain its sca-
venge air supply from non-water-cooled turbochargers of M's own design. The bedplate is of
welded construction supporting the cast steel main bearing housings and the bedplate; A-frame
and cylinder blocks are held together by long stay bolts. Four bolts firmly secure each main
bearings to the bed plate.
The position are water-cooled, the coolant being supplied through telescopic pipes which
are connected to the underside of the piston crown and operate in sealed water collectors while
53
5. В течение некоторого времени оба клапана бывают открыты одновременно с це-
лью 6. продувки камеры сгорания.
VIII. Answer the questions to the text.
1. How has this engine output been increased?
2. What reduces the engine length?
3. What fuel can the engine operate?
4. What valves does the cylinder head carry?
5. What helps to reduce overhaul time?
6. Who is engine maker?
IX. Look through the text again and pick out the main sentences.
Lesson 21A
To be read without dictionary and rendered in English
Sweden Ships with MAK
Sweden has joined the group of countries having «super tugs». The owners Neptun
Transport & Marine Service AO, Stockholm, specified MAK main engines for the vessel and
its following sister-ships.
Four MAK diesel, Type 8M453AK with a combined output of 23,000 bhp act with
150 rpm on the two screws of the «VLT» (Very Large Tug) to give it a free-running speed of
17 knots. The ship can stay at sea for 35 days without refueling.
Maximum reliability with minimum expenditure was the basic of design for the machi-
nery installation.
The four main engines act in pairs on two propeller shafts through a reduction gear. Dri-
ven directly from the reduction gear are pumps for propeller manoeuvre, steering gear, towing
winch and shaft generator. The power and reliability of MAK engines make them an ideal choice
for tugs. They were again specified for two newest tugs. Each has a Type 8M453AK unit an out-
put of 4,200 hp at 600 rpm and driving through a reduction gear onto a controllable – pitch pro-
peller of 2.9 m diameter. At 3,000 brake horsepower the maximum speed is 14 knots, while fuel
consumption is 9.7 to 10.8 t; at the cruising speed of 12.5 knots it's about 7.2 t.
Answer the question:
What technical data has this engine?
Lesson 22
Mitsubishi's UEC 85/180 D Machine
The highest-powered low-speed crosshead-engine built by Mitsubishi Heavy Industries Ltd,
is the UEC 85/180 D type which is rated at 3,000 bhp/cylinder when operating at 118 rev/min.
This engine is a two-stroke, uniflow-scavenging, crosshead machine that obtain its sca-
venge air supply from non-water-cooled turbochargers of M's own design. The bedplate is of
welded construction supporting the cast steel main bearing housings and the bedplate; A-frame
and cylinder blocks are held together by long stay bolts. Four bolts firmly secure each main
bearings to the bed plate.
The position are water-cooled, the coolant being supplied through telescopic pipes which
are connected to the underside of the piston crown and operate in sealed water collectors while
53
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