ISO 3715-2:2001 船舶と海洋技術—船舶の推進プラント—パート2：可変ピッチプロペラプラントの用語, 語彙 | ページ 2

1

controllable-pitch propeller

screw propeller with controllable pitch of the blades

Note 1 to entry: Figure 1 shows a controllable-pitch propeller unit and its individual components.

1.1

controllable-pitch reversible propeller

screw propeller with controllable pitch of the blades in positive and negative range of pitch angle

1.2

controllable-pitch non-reversible propeller

screw propeller with controllable-pitch of the blades in the positive range of pitch angle

1.3

controllable-pitch propeller including feathering position

screw propeller with controllable pitch of the blades in positive and negative range of pitch angle and in feathering position

2

Blade

See definition in ISO 3715-1.

2.1

blade attachment

component part for force-locking and form-locking connection of a blade with the hub

2.2

blade bearing

bearing of the blade in the hub

Note 1 to entry: Diagrammatic sketches of other types of bearings are given in Figures 2, 3 and 4.

2.3

blade seal

seal between blade and hub to prevent seawater from leaking in and oil and grease from leaking out

3

Hub

See definition in ISO 3715-1.

Note 1 to entry: If applicable, the cap may be part of the hub.

3.1

hub connection

component for force-locking and form-locking connection of hub with propeller shaft

4

flange protection

protection of the aft flange of propeller shaft against mechanical and/or corrosive influence

5

shaft

carrier of power and control transmission

5.1

propeller shaft

shaft with arrangement for attachment of propeller

5.2

intermediate shaft

shaft between propeller shaft and oil distribution box or gear

6

control unit

systems transforming a rated pitch value into an actual value and supporting it

7

hydraulic unit

components that serve the generation, controlling and transmission of the oil circuit/oil pressure and for operating the control transmission and control mechanism

Note 1 to entry: These components include pumps, valves, pipe lines, tanks, filters, coolers, etc.

8

control system

system to feed a rated pitch value, given by a control system, into the hydraulic unit

9

pitch control

system to support the given rated pitch value

10

feedback system

system using the actual pitch value for control purposes

11

pitch indicator

device to indicate the actual pitch value

12

control transmission

device to transmit actual pitch values into the control mechanism

13

oil-distribution box

device to feed and draw the control medium to and off the shaft (axial and peripheric) to operate the control mechanism

14

servomotor

device consisting of piston and cylinder to transform oil pressure into control force and oil circuit into adjustment path

15

oil-transfer tube

connection inside the shafts between oil distribution box and servomotor

Note 1 to entry: Movable pipes within the shaft may also be used for feedback of actual pitch values and for transmission of forces.

16

pitch-actuating rod

push/pull rod

connection between servomotor and control mechanism for force transmission and to feed back actual pitch values

17

control mechanism

device inside the hub to transmit the control force and to transform the path of the servomotor into a control angle of a blade

Note 1 to entry: Diagrammatic sketches of other types of mechanisms are given in Figures 5 and 6.

18

take-home equipment

device that enables the propeller to operate like a fixed-bladed propeller when the control unit fails

19

control system

input device for rated pitch values

19.1

remote control system

control system separate from the control unit

Note 1 to entry: This could be in the ship's control station and/or steering stand.

19.2

manual control system

control system fitted to the control unit

Note 1 to entry: This could be in the back-up control.

20

Pitch

See definition in ISO 3715-1.

20.1

design pitch

positive pitch resulting from the propeller design calculation

Note 1 to entry: Preferable pitch is at 0,7 R .

20.2

nominal pitch

positive pitch, which enables a defined operation condition such as ship speed, power, shaft speed

Note 1 to entry: The nominal pitch may differ from the design pitch.

20.3

maximum ahead pitch

maximum adjustable positive pitch

Note 1 to entry: The maximum ahead pitch is larger than the design pitch by a given value.

20.4

maximum astern pitch

maximum adjustable negative pitch

20.5

range of pitch angle

control angle of the blade position

20.6

commanded pitch

value of pitch given by the control system to be realized

20.7

actual pitch

value of pitch at the time of viewing

20.8

tolerance of pitch setting

permissible deviation of the actual pitch value from the commanded pitch value related to design pitch

20.9

time for pitch changing

time being necessary to move the blade from one defined pitch to another

21

zero thrust position

blade position at which the rotating propeller with the ship speed at zero does not produce any thrust

22

feathering position

pitch position at which the unrelated propeller produces the lowest resistance

23

trailing position

defined pitch for the trailed propeller when ship is going ahead

Note 1 to entry: This is normally the highest possible pitch required to achieve low rotational frequency.

24

angle of blade position

angular position of the blade relative to the blade axis (spindle axis)

25

zero point of blade position

zero value of the blade angle positioned close to the zero thrust position

26

windmilling

propeller operating as a turbine in the wake of an operating ship and delivering power to the shaft

27

nominal pressure

pressure for which the hydraulic unit has been designed under defined operating conditions

28

testing pressure

static pressure above the nominal pressure for testing purpose of the hydraulic unit under defined conditions

29

pitch-changing pressure

pressure necessary to change the pitch of the blades

30

pitch-keeping pressure