N
Shinko has manufactured more than 9,500 sets of R type steam turbines since the development of our first cargo oil pump turbines and ballast pump turbines for oil tankers in 1960. To this date, we have constantly focused on improving product quality, operation performance, and many other aspects.In recent times, the following considerations have also been more vital due to escalating fuel prices, prevention of air pollution, and other environ-mental issues:
● Improving the efficiency of cargo oil pump turbines
● Reducing fuel consumption
In these situations, we have accelerated multiple improvements to the turbine performance using the CFD analysis method.
The vertical R models are Curtis single-stage or Rateau 3-stage steam turbines with a single reduction gear. We have the following 5 standard models classified by maximum output:
GENERAL CHARACTERISTICS
Curtis single-stage Rateau 3-stage
8 × 0.1
600
8500
6.45
100
300
5 × 0.1
190
3
8
2300
1300
7200
6.65
125
400
270
4.8
15
3500
1850
7200
6.06
1.85
280
‐80kPa ~ 0.03MPaG
Counter-Clockwise facing toward pump
150
500
Forced lubrication(turbine oil ISO VG68)
7.2 × 0.04
280
5
15
Woodward UG25+
Rated × 100 ~ 50%
4500
2000
7200
6.11
150
500
280
5.7
15
5500
4000
7200
7.17
150
600
320
7.3
20
6800
RX 0 RX 1 RX 2-2 RVR 1 RVR 2-2
1
1625
1002
1001
2124
2106
1433
2107
2108
1050
1460
2101
1325
8001
1322
1306
13011401
In order to ensure ease of inspection and maintenance of the casing interior as well as simple overhauling of the rotating element, consideration has been given to the following points in our design.
1. The steam chest and reduction gear casing are split vertically.2. The pipe connections for the steam inlet, LO inlet and outlet, and drainages are fitted on to the casing body.3. The reduction gear casing cover is fitted to the casing body with a hinge.
DESIGN & MATERIALS
2
SOLENOIDVALVE
TURBINE ROTORBEARINGSOIL JET FOR GOVERNORDRIVING GEARINGOIL JET FOR LO PUMPDRIVING GEARINGREDUCTION GEARBEARINGSOIL JET FORREDUCTION GEARING
LO COOLER
Coolingwater
LO STRAINER
LO TANK
MAINLOPUMP
PRESS.ADJUSTINGVALVE
CHECKVALVE
PRIMINGLO PUMP
ELECTRICSOURCEAC 440V60Hz・3φ
CHECKVALVE
ELECTRIC WIREOUT OF SUPPLY
SUMP OILLO PRESS
STEAMAIR PRESS.
TACHOMETERTRANSMITTERROTOR
OVERSPEEDTRIP
RESETKNOB
HANDTRIPKNOB
LIMITSWITCH
LIMITSWITCH
UG10DWOODWARDGOVERNOR
M
SteamInlet
Tonozzle
O
S
TRIPSERVO-
MOTOR
GOVERNOR &EMERGENCYSTOP VALVE
PRIM.LO PUMPSTARTER
PUMPROOM
FromExhaust
PS FOR HIGH
BACK PRESS. TRIP
PS FOR OVER
DISCH. PRESS. TRIP
PS FOR
PRIM. LO PUMP
PS FOR LOW
LO PRESS. TRIP
PS FOR LOW
LO PRESS. ALARM
GAUGE BOARD(Mounted on hull)
EXHAUSTSTEAMCHEST
LUB.OIL
GLANDSTEAM
SPEEDCONTROLSWITCH
TACHOMETERINDICATOR
TRIPMASTERIND.LAMP
RUN.IND.LAMP
CARGO CONTROL ROOM
RELAY BOX
THERMO-SWITCHES FOROVERHEAT ALARM & TRIP
GROUP BOARD(Mounted on hull)
DISCON.SWITCH
STOPSWITCH
TRIP RESETPUSH BUTTONSWITCH
STOPVALVE
Suc.Disch.
PRESS.TRANSMITTER
STOPVALVE
Air P.
SOURCELAMP
TRIP CAUSEINDICATION LAMP
TACHOMETERINDICATOR
CHECKVALVE
ELECT.SOURCE
ELECT.SOURCE
ELECT.SOURCEAC100~220V
UPPERBEARING
PUMPCASING
BULKHEADS. BOX
LOWERBEARING
Speed Control System Turbine Gland Seal
Lubrication System
Tachometer (Patented)
The Woodward UG or PG governor is employed on the turbine and its speed can be adjusted between 50%~100% of the rated speed by operating the control switch in the cargo control room, or on site.
The turbine glands are sealed with labyrinth packing when the exhaust steam is led to the vacuum condenser.
To prevent air from entering into the turbine casing, sealing steam is led to the turbine glands. The sealing steam first passes through the throttle steam valve and then the safety orifice in order to reduce its pressure to 0.01~0.08MPaG before reaching the turbine glands.
During operation of the turbine, the LO is supplied to the bearing metal, reduction gear, and other components through the main LO pump.Besides, in order to maintain safe operation, an independent electric motor driven priming LO pump is utilized. When the turbine starts, it is inter-locked so as not to start even if the inlet steam valve is open until the pressure of the LO line reaches between 0.02~0.03MPaG. On the contrary when the turbine stops, the priming LO pump stays operating to keep the LO pressure at 0.02 to 0.03MPaG until the turbine stops completely.
This tachometer, having three functions showing the number of revolutions, the running indications, and the overspeed trip, is a patented electronic system. As shown in the figure below, this system is composed of a transmitter, receivers, and speed relays, and needs no external power source.
43
Alarm & Trip Systems Rotor Axial Movement Trip (Option)
High LO Temp. Level AlarmLow LO Level Alarm (Option)
Alarms and trips are very important functions to avoid pump & turbine trouble, and automatic actuation is essential. Alarm items are command, which informs to operate the equipment attentively. The contacts of each alarm signal are sent to a Cargo Control Room (CCR). Depending on the alarm, it is necessary to take an action to reduce the turbine speed at CCR or to visit the machine side (pump or turbine) to verify the abnormality of the equipment.
In the case that the turbine rotor moves abnormally in an axial direction for some reason, the moving and stationary blades may come into contact and may cause severe damage. This trip is fitted in place with a 1mm clearance (C) from the shaft end. When the thrust bearing wears down by 0.7mm and clearance (C) becomes 0.3mm, the turbine is tripped.
In the case that LO temperature rises to 53℃ or the LO level lowers from normal level to 60mm due to LO line failure, the thermo switch or float switch actuates sending alarms to the CCR/ECR respectively.
Each trip is designed to stop the turbine by closing the governor valve automatically.The trip signal activates the local trip-solenoid valve (Trip:off) via relay box, resulting in the release of LO pressure and the closure of the governor valve.The signals to the CCR are as follows;Trip cause indication lamps are provided on the local relay box and the trip signals are sent to the master trip lamp in the CCR.
5
STANDARD SPARE PARTS 〔per ship〕Relay box auxiliary relay Relay box pilot lampRelay pilot lamp globe Relay box fuse element Solenoid valve coil (set*=all units of the same model and application)
Journal bearing metalThrust bearing metal Each kind of spring Special gasket & packing LO cooler cooling tube Priming LO pump ball bearing
1/set*1/set*1/set*1/set*
2.5% of total amount/set*1/set*
1/set*10% of total amount/set*
2/set*100% of total amount/set*
1/set*
6
Printed in Japan 2017.11.50 N.H.
RVR 1RVR 2-2
A24202435
B920985
C620565
D880885
E233331
F513611
G400400
H I650750
J17102060
K15271833
L680830
M988
1176
N880
1035
O630635
P465490
Q190220
R1427
S810900
T1150
850
UR1460R1690
VR510R615
W200250
X23302330
800800
Model
RX 0RX 1
A17141890
B15001750
C280395
D455505
E405450
F360400
H600830
J K107189
L830850
M12401580
N12071405
P382460
Q680800
R676950
S425465
T190190
U3232
V12001200
W350385
X1
200200
X2
R1110R1338
YR385R455
Z1
530600
650950
RX 2-2 1949 1780 405 495 480 400 830 255 970 1760 1527 532 850 1025 465 190 32 1200 360 200 R1540 R527 630 1150
Z2
200200200
Model
E
F N
V
G
HR
K
U
(60°)
MIN.DISASSEMBLINGEXTENT
J
I
W
PO
Q
X
T
M
DC
B
A
S
L
TURNING HANDLE
EXHAUST
COOLINGWATER
STEAMINLET
X1
Q
J
Z1
Z2
L
N
K
X2
(60°)
Y
MIN.DISASSEMBLINGEXTENT
M
P
TUBEMAINTENANCE SPACE
U
FD
H
V
TURNING BAR
WB
C
T
A
E
SR
MAINTENANCE SPACE
STEAMINLET
EXHAUST
COOLINGWATER
Dimensions:mm