(1) The marine fans are designed and manufactured according to the specification of the following ship classification societies:
1. CCS China Classification Society
2. ZY Register of fishing vessel of the people’s republic of china
3. BV Bureau Veritas
4. NK Nippon Kaiji Kykkai
5. LR Lloyds Register of Shipping
6. ABS American Bureau of Shipping
7. DNV Det Norske Veritas
8. GI Germanischer Conditions
(2) Basic technical conditions
1.1 Basic working conditions and applicable conditions for marine fans:
The parameters shown in the book are the air performance under standard atmospheric conditions (atmospheric pressure 101325Pa, temperature 20℃, relative humidity 50%, air density 1.2kg/m).
When the actual condition and revolution are different from the parameters table, fan performance can be calculated as following.
1.2 Applicable conditions
Fans can convey air, sea air containing sale vapor and corrosive air containing oil vapor.
Fans can meet relative marine standard and regulations.
Fans can make working regularly at the following terms:
Ambient temperature : -25℃ ~ +55℃ (+50℃)
Max relative humidity: 95%
Horizontal rolling : ±45°(cycle8~12S) ;
Vertical rolling : ±15°(cycle5~7S) ;
Horizontal tilting : ±15°
Vertical tilting : ±10°
Vibration: existing
Shock: existent
1.3 Explosion-proof fan
The explosion-proof mark of explosion-proof fan is Exd II BT4, Exd II CT4.-T5
Dangerous explosive mixtures are graded according to their ability of spreading explosion; they are grouped according to their ignition temperature.
2. Installation type for fan
2.1 Installation type for centrifugal fan
Fan of horizontal type, motor is direct coupling. If necessary, it can also be constructed into a vertical type.
The fan can be made for clockwise (right) or counter clockwise (left) rotation. Right rotation-- viewed from the motor side, the impeller rotates clockwise and indicated as “R”. Left rotation ---- viewed from the motor side, the impeller rotates counter clockwise and indicated as “L”. According to the rotating direction, the outlet position of fan is made for following structures.
2.1.2 Explosion-proof centrifugal fan
The explosion-proof centrifugal fan can be made into two structural types, type I and type II.
Type I is in horizontal pattern with direct coupling for the motor, however, it can also be constructed into a vertical pattern.
Type II is in separate cabin pattern, made up of fan, driving device, coupling and motor.
2.2 Installation type of axial fan
Viewed from the motor side, the impeller rotates clockwise.
In general, fan is vertical structure, and if necessary it can also be made in horizontal structure whit frame.
2.2.1 Explosion-proof axial fan
The explosion-proof axial fan can be made into two structure types, type I (deck type) and type II (tube type):
Type I has a hood and an explosion-proof motor installed on the top of the frame. The fan is vertically fixed on the deck.
Type II has no hood. It can be installed vertically or horizontally, and can also be installed on the deck.
3. Protection class of fan
The main function is to prevent man from damage of electricity or rolling and or to prevent solid object, water, oil from entering. It conforms to GB4942 and IEC34-5.
4 Insulation class and limit of temperature rise
It is necessary to separate with insulation material between electric parts and casing. Life of insulation material with insulation degree of its material and temperature has very closed relations. The motor is an
element to convert the energy and signal. The motor consume energy itself during is running. Temperature rising is caused by energy consumption. Normally insulation
degree and limit of temperature rise in method of resistance check are according with the following table. It is according to GB755 and IEC34-1.
(3) Common measurement units
Air volume: m3/h、m3/min、m3/s
Air pressure: mmH2O, mmAq
Power: KW.W Remark: 1mmH2O=9.807Pa
(4) Tolerance
Under standard flow volume, full pressure value of fan, the tolerance is- -5%～+15%
1. CCS China Classification Society
2. ZY Register of fishing vessel of the people’s republic of china
3. BV Bureau Veritas
4. NK Nippon Kaiji Kykkai
5. LR Lloyds Register of Shipping
6. ABS American Bureau of Shipping
7. DNV Det Norske Veritas
8. GI Germanischer Conditions
(2) Basic technical conditions
1.1 Basic working conditions and applicable conditions for marine fans:
The parameters shown in the book are the air performance under standard atmospheric conditions (atmospheric pressure 101325Pa, temperature 20℃, relative humidity 50%, air density 1.2kg/m).
When the actual condition and revolution are different from the parameters table, fan performance can be calculated as following.
1.2 Applicable conditions
Fans can convey air, sea air containing sale vapor and corrosive air containing oil vapor.
Fans can meet relative marine standard and regulations.
Fans can make working regularly at the following terms:
Ambient temperature : -25℃ ~ +55℃ (+50℃)
Max relative humidity: 95%
Horizontal rolling : ±45°(cycle8~12S) ;
Vertical rolling : ±15°(cycle5~7S) ;
Horizontal tilting : ±15°
Vertical tilting : ±10°
Vibration: existing
Shock: existent
1.3 Explosion-proof fan
The explosion-proof mark of explosion-proof fan is Exd II BT4, Exd II CT4.-T5
Dangerous explosive mixtures are graded according to their ability of spreading explosion; they are grouped according to their ignition temperature.
|
组别groups 级别grades |
T1 ≤450℃ |
T2 ≤300℃ |
T3 ≤200℃ |
T4 ≤135℃ |
T5 ≤85℃ |
|
IIA |
甲 烷 methane 乙 烷ethane 丙 烷 propane 甲 苯 toluene 醋 酸 acetic acid 丙 酮 acetone 一氧化炭carbonmonoxide 苯 benzene |
醋酸乙酯thyl acetate 甲 醇methanol 乙 醇 ethanol 乙 ethyl benzene 二氯乙烷dichloromethane |
石 油petroleum 车用汽油gasoline 燃 料 油 fuel oil 煤 油 kerosene 柴 油diesel oil 松 节 turpentine |
乙 醛 acetaldehyde 三甲胺trimethylamine |
|
|
IIB |
焦炉煤气 gas form coking coal 氰 化 氢cyan hydrogen 环 丙 烷naphthalene 丙 炔alkynes |
环氧乙烷 epoxy ethane 乙 烯ethylene 丙燃酸甲酯 acrylics |
硫化氢 vulcanized oxygen 四氢呋喃tetrahydrofuran 二甲醚 ether |
四氟乙烯fluon 二 乙 醚diether 乙基甲基ethyl ether |
|
|
IIC |
氢 hydrogen 水煤气 water gas |
乙炔 acetylene |
|
|
二氧化硫 CS2 |
2.1 Installation type for centrifugal fan
Fan of horizontal type, motor is direct coupling. If necessary, it can also be constructed into a vertical type.
The fan can be made for clockwise (right) or counter clockwise (left) rotation. Right rotation-- viewed from the motor side, the impeller rotates clockwise and indicated as “R”. Left rotation ---- viewed from the motor side, the impeller rotates counter clockwise and indicated as “L”. According to the rotating direction, the outlet position of fan is made for following structures.
2.1.2 Explosion-proof centrifugal fan
The explosion-proof centrifugal fan can be made into two structural types, type I and type II.
Type I is in horizontal pattern with direct coupling for the motor, however, it can also be constructed into a vertical pattern.
Type II is in separate cabin pattern, made up of fan, driving device, coupling and motor.
2.2 Installation type of axial fan
Viewed from the motor side, the impeller rotates clockwise.
In general, fan is vertical structure, and if necessary it can also be made in horizontal structure whit frame.
2.2.1 Explosion-proof axial fan
The explosion-proof axial fan can be made into two structure types, type I (deck type) and type II (tube type):
Type I has a hood and an explosion-proof motor installed on the top of the frame. The fan is vertically fixed on the deck.
Type II has no hood. It can be installed vertically or horizontally, and can also be installed on the deck.
3. Protection class of fan
The main function is to prevent man from damage of electricity or rolling and or to prevent solid object, water, oil from entering. It conforms to GB4942 and IEC34-5.
|
代号 Code |
含义 Meaning |
第一位数字 Initial No. |
含义 Meaning |
第二位数字 Second No. |
含义 Meaning |
|
IP |
国际防护形式 International protection |
4 |
防大于1mm固体 >1mm solid object |
4 5 |
防溅水Anti splash water 防喷水 Anti spray water |
|
5 |
防尘Anti dust |
6 |
防海浪Anti sea tide |
It is necessary to separate with insulation material between electric parts and casing. Life of insulation material with insulation degree of its material and temperature has very closed relations. The motor is an
element to convert the energy and signal. The motor consume energy itself during is running. Temperature rising is caused by energy consumption. Normally insulation
degree and limit of temperature rise in method of resistance check are according with the following table. It is according to GB755 and IEC34-1.
|
绝缘等级 insulation grade |
使用极限温度 temp.limit |
温升限值 limit of temp.rise |
|
E |
120℃ |
75K |
|
B |
130℃ |
80K |
|
F |
155℃ |
105K |
|
H |
180℃ |
125K |
Air volume: m3/h、m3/min、m3/s
Air pressure: mmH2O, mmAq
Power: KW.W Remark: 1mmH2O=9.807Pa
(4) Tolerance
Under standard flow volume, full pressure value of fan, the tolerance is- -5%～+15%