- •Материал для изучения на 4 курсе 7 семестре специальности эд
- •Cargo Handling Equipment
- •Cargo Handling Equipment
- •Mooring equipment
- •Anchor handling equipment
- •Hatch covers
- •5. По источнику подачи рабочей жидкости гидроприводы могут быть насосным, магистральными и аккумуляторными.
- •6. У крана стрелового типа грузозахватный механизм подвешен непосредственно к стреле или к перемещающейся по стреле грузовой тележке
- •Comprehensive reading Text a. Stern and Bow Doors
- •Text b. Ramps
- •Text c. Side Doors and Loaders
- •Автоматизация на судне Automation. Bridge control.
- •Introduction
- •Autochief Main Engine Bridge Control
- •Вспомогательные механизмы. Auxiliaries. Pumps
- •Operation and maintenance instructions
- •During operation
- •Stopping
- •Exercise 6. Discuss the causes and remedies of the most common troubles with the pumps
- •Irregularities, their causes and remedies
- •Diesel engine maintenance
- •Устранение неполадок. Неполадки, их причины и возможные решения
- •Irregularities in operation, causes and remedies
- •Irregularities in Operation, Causes and Remedies
- •Engine damage
- •Бункеровка bunkering of ships
- •Before Bunkering
- •During Bunkering.
- •After Bunkering
- •Documents
Autochief Main Engine Bridge Control
AutoChief III is a main engine bridge control system for single engine plant with fixed propeller. It is designed for engines having extensive pneumatic manoeuvring equipment delivered as part of the engine in order to get the maximum benefit from the engine standard system. Norcontrol speed-set unit controls set point to main engine standard governor. AutoChief III is an electronic-pneumatic system, using electrical signal transmission from bridge to engine room and between sensors and the central unit. Starting, reversing and, speed are controlled directly by a manoeuvring handle on bridge which also has built-in emergency telegraph system. The engine is automatically protected against rough manoeuvring.
The engine-room panel, which is normally located near by existing f manual manoeuvring system, contains necessary test and simulating facilities. The electronic logic is concentrated on a minimum number of cards, which results in low spare part costs.
Вспомогательные механизмы. Auxiliaries. Pumps
Exercise 1. Read and learn the following words and expressions:
1 |
to flow out |
вытекать |
2 |
suction head |
высота всасывания |
3 |
rotation |
вращение |
4 |
rotary |
ротационный |
5 |
arrow |
стрелка |
6 |
acquirement |
требование |
7 |
ammeter |
амперметр |
8 |
to exceed |
превышать |
9 |
single stage |
односекционный |
10 |
rating |
расчетная величина |
11 |
tightness |
герметичность, зд: затяжка |
12 |
packing gland |
сальник, уплотнение вала |
13 |
to trap |
захватывать |
14 |
impeller |
крылатка |
15 |
volute |
улитка |
16 |
output |
производительность |
17 |
plunger |
плунжер |
18 |
discharge head |
высота нагнетания |
19 |
reciprocating |
поршневой |
20 |
screw |
винтовой |
21 |
centrifugal |
центробежный |
22 |
gear |
шестерёнчатый |
23 |
vane |
лопастной |
24 |
axial-plunger |
аксиально плунжерный |
25 |
jet |
струйный |
Exercise 2. Read and translate the text
Marine Pumps
On board ship, pumps are used for a number of services. Pumps feed water to the boilers, draw condensate from the condensers, supply sea water to the fire-main, circulate cooling water for the main and auxiliary engines cooling system, coolers and condensers, empty the bilges, transfer fuel oil, pump in and out ballast water, discharge fuel oil to the burners and fuel injection valves, circulate lube oil to bearings and gears of the propulsion plant components.
Every pump has a power end, which may be a steam turbine, a reciprocating engine or an electric motor, and a liquid end where the liquid enters and leaves the pump.
The suction head means the pressure of the liquid entering the pump, or the difference in the level of liquid with respect to the level of the pump on the suction side. The discharge head means the pressure of the liquid leaving the pump, or the level of liquid with respect to the level of the pump on the discharge side.
Most marine pumps are of reciprocating, rotary, centrifugal, or jet type.
The reciprocating pump moves liquid or gas by means of a piston or plunger which goes back and forth or up and down within a cylinder containing a suction valve and a discharge valve. An adjustable relief valve is fitted to the discharge chamber to protect the pump and piping against excessive pressure.
All rotary pumps work by means of rotating parts, which trap the liquid at the suction side and force it through the discharge outlet. Classification of rotary pumps is generally made according to the type of rotating elements: screw, gear, vane, axial-plunger rotary pumps. Rotary pumps are particularly used for pumping oil and other heavy, viscous liquids.
The centrifugal pump utilizes the throwing force of a rapidly revolving impeller. The liquid is drawn in at the center of the impeller and is discharged at the outer rim of the impeller. Centrifugal pumps are widely used on board ship for pumping, no viscous liquids. Fire pumps usually are single stage, double suction, volute type either turbine-driven or motor-driven centrifugal pumps. Main feed pump is a high-speed, multistage, turbine driven, horizontal or vertical pump.
Jet pumps, unlike other types of pumps, use the Venturi effect to move fluid from one location to another, it means that the fluid is drawn into the pump passing through a constricted section. While passing through the constricted section the fluid’s pressure decreases, while the fluids velocity increases resulting in an increase in kinetic energy that allows fluid to flow.
There are many brands and models of jet pumps available, with some models offering pump capacity of up to a thousand gallons per hour. When choosing these pumps, the first thing should be paid attention to is how much water flow is required.
Exercise 3. Answer the following questions:
1. What is the most often used type of pumps in ships? 2. Where are the pumps to be found? 3. What is the function of the pumps? 4. What does the pump consist of? 5. Is it good when the liquid seeps through the packing? 6. Is impeller keyed onto the shaft? 7. How is the shaft protected against liquid? 8. What should be head of the pump be? 9. If the pump does not deliver water, will you check the casing? Should it be full of liquid? 10. What is recommended to do during long standing still periods?
Exercise 4. Give Russian/English equivalents.
-
Steam turbine powered vessel; to handle fresh water; vertical shaft unit; pump casing, coupling; suction nozzle and discharge nozzle; secured by means of studs; grease lubricator; operating features; power requirements; discharge chamber; packing;
-
высота всасывания, односекционный, лопастный насос, захватывать, набивка, труба, уплотнительное кольцо, заглушка, мощность, приемное сопло, фланец, предотвращать, корпус, муфта, крылатка, вертикальный агрегат.
Exercise 5. Look through the following information and then make the translation of the part B.
Part A.