- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄351585 > 150017-02 127MM BLOWER PDF資料下載
參數(shù)資料
| 型號： | 150017-02 |
| 英文描述： | 127MM BLOWER |
| 中文描述： | 直徑127mm鼓風機 |
| 文件頁數(shù)： | 48/57頁 |
| 文件大小： | 2228K |
| 代理商： | 150017-02 |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁第9頁第10頁第11頁第12頁第13頁第14頁第15頁第16頁第17頁第18頁第19頁第20頁第21頁第22頁第23頁第24頁第25頁第26頁第27頁第28頁第29頁第30頁第31頁第32頁第33頁第34頁第35頁第36頁第37頁第38頁第39頁第40頁第41頁第42頁第43頁第44頁第45頁第46頁第47頁當前第48頁第49頁第50頁第51頁第52頁第53頁第54頁第55頁第56頁第57頁
50
AE99
Physical Laws for Blower Applications
In the following formulae these symbols are used:
P-Pressure in pounds per square inch (PSI) or inches of
mercury column (inches Hg)
CFM-Volume in cubic feet per minute
RPM-Speed in revolutions per minute
D-Density in pounds per cubic foot (lbs./cu. ft.)
H-Height of air or gas column (ft.)
SG-Specific Gravity (ratio of density of gas to the density
of air)
“Standard Air”-Air at 68O F (absolute temperature 528O) and
29.92” Hg. (barometric pressure at sea level). The density of
such air is 0.075 lbs./cu. ft. and the specific volume is 13.29
cu. ft./lb. The specific gravity is 1.0.
The outlet pressure of a blower depends on the condition of
the air or gas at the inlet. The inlet condition is influenced by:
a-Specific gravity (the ratio of density of the gas to density
of standard air)
b-Altitude (location of blower)
c-Temperature of inlet air
Basic Fan Laws Chart
Volume
The Volume changes in direct ratio to the speed.
Example – A blower is operating at 3500 RPM and delivering
1000 CFM. If the speed is reduced to 3000 RPM, what is the
new volume?
V1 = Original Volume (1000 CFM)
V
2 = New Volume
RPM1 = Original Speed (3500 RPM)
RPM2 = New Speed (3000 RPM)
V
2
= V
1 (
RPM
2
)1 = 1000 x (
3000 )1 = 1000 x .857 = 857 CFM
RPM
1
3500
Pressure
VARIABLE
VOLUME
PRESSURE
HORSEPOWER
WHEN SPEED CHANGES Varies DIRECT with Speed Ratio
Varies with SQUARE of Speed Ratio
Varies with CUBE of Speed Ratio
CFM
2
= CFM
1
( RPM2 )
P
2
= P
1
( RPM2 )2
HP
2
= HP
1
( RPM2 )3
RPM1
WHEN DENSITY CHANGES
Does Not Change
Varies DIRECT with Density Ratio
P
2
= P
1
(D2 )
HP
2
= HP
1
(D2 )
D1
Pressure (barometric) varies in direct proportion
to altitude.
Example – A blower is to operate at an elevation of 6000 feet
and is to deliver 3 PSI pressure. What pressure (standard air)
blower is required?
Pressure = 3 x
29.92
= 3.75 or 3 3/4 PSI
23.98
If it is desired to determine what pressure a 3 PSI (standard
air) blower will deliver at 6000 feet –
Pressure = 3 x
23.98
= 2.4 or about 2 1/2 PSI
29.92
When a blower is to operate at a high altitude it is frequently
specified that the blower be capable of handling a given
volume of “standard air”. It is then necessary to determine
the equivalent volume of air at the higher altitude.
Example – A blower is to operate 6000 feet altitude and is to
handle 1000 CFM of standard air. What is the CFM of air the
blower must handle at 6000 feet altitude?
Let: V1 = Volume of standard air (1000 CFM)
V2 = Volume of thinner air
Hg
1 = Barometric pressure sea level (29.92)
Hg2 = Barometric pressure 6000’ (23.98)
V2 = V1 x
Hg1 = 1000 x 29.92 = 1248 CFM
Hg
2
23.98
The pressure changes as the square of the
speed ratio.
Example – A blower is operating at a speed of 3500 RPM and
delivering air at 5.0 PSI pressure. If the speed is reduced to
3000 RPM, what is the new pressure?
P1 = Original Pressure (5 PSI)
P
2 = New Pressure
RPM1 = Original Speed (3500 RPM)
RPM2 = New Speed (3000 RPM)
P
2
= P
1
(
RPM
2
)
2
= 5 x
(
3000 )2 = 5 x .735 = 3.68 PSI
RPM
1
3500
相關PDF資料 |
PDF描述 |
|---|---|
| 150072-02 | 79MM MOTOR |
| 15009 | TRENNSCHALTER 32A 240V |
| 15010 | TRENNSCHALTER 32A 240 415V |
| 15010250 | LED T1 BI-PIN 12V RED |
| 15010251 | LED T1 BI-PIN 12V GREEN |
相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| 15001710407 | 制造商:3M Electronic Products Division 功能描述:Connector Accessories Shroud Back Plane Rear Plug 160 POS 制造商:3M Electronic Products Division 功能描述:CONN PLUG REAR 160POS 4ROW |
| 150017-240 | 功能描述:射頻模塊 4.0-8.0GHz Iso 14dB Image Reject 15dB RoHS:否 制造商:Linx Technologies 產品:Transceiver Modules 頻帶:902 MHz to 928 MHz 輸出功率:- 15.5 dBm to + 12.5 dBm 接口類型:UART 工作電源電壓:- 0.3 VDC to + 5.5 VDC 傳輸供電電流:38.1 mA 接收供電電流:22.7 mA 天線連接器類型:U.FL 最大工作溫度:+ 85 C 尺寸:1.15 mm x 0.63 mm x 0.131 mm |
| 150017-52 | 制造商:AMETEK Technical and Industrial Products 功能描述:Low Voltage Brushless DC Blower - 12V |
| 1500-18 AS | 制造商:z*INACTIVE* ANDERTON 功能描述: |
| 1500185 | 制造商:Phoenix Contact 功能描述:SAC-3P-M 8MS/ 5 0-PUR/M12FR |
發(fā)布緊急采購，3分鐘左右您將得到回復。