Technology and Theorem of Longtech’s Roots Blower

The Feature of Longtech'sRoots Blower
Longtech three lobes Roots Blower are new series Roots type blowers. By CNC machine, we made precise rotors. Getting a perfect gap to promote air performance, lower vibrations and noises results a significant improvement compared to traditional Roots Blower of two lobes
Traditional Roots Blower lubricates bearings and gears with
grease and oil but Longtech's is designed to add oil only. It
is very convenient to maintain and oil has a better lubricating
effect than grease. So it could be a longer bearings and gears
life.
Roots Blower compress air by two rotors' rotation. Rotors do not contact under high speed rotating. Although there is only a 0.1~0.3 mm gap between two rotors, it does not need adding lubricating oil between rotors. So it can transport cleanly and contain none oil moist air.

The Processes are as Follows:
- air input
- embraced by cylinder and rotor
- air discharge.

NO. |
NAME |
MATERIAL |
NO. |
NAME |
MATERIALS |
1 |
GEAR CASE |
FC250 |
11 |
SEAL CASE |
FC250 |
2 |
OIL SPLASH |
SS400 |
12 |
PULLEY |
FC250 |
3 |
OIL PLUG |
S45C |
13 |
NUT |
SS400 |
4 |
BEARING |
SUJ2 |
14 |
SEAL |
NBR |
5 |
BEARING CASE |
FC250 |
15 |
NUT |
SS400 |
6 |
LABYRINTH SEAL |
SS400 |
16 |
SHAFT |
SCM440 |
7 |
EYE BOLT |
S45C |
17 |
MAIN CASING |
FC250 |
8 |
ROTOR |
FC250 |
18 |
SPUR GEAR |
SCM415 |
9 |
SIDE COVER |
FC250 |
19 |
OIL DRAIN |
S45C |
10 |
OIL CASE |
FC250 |
20 |
OIL GAUGE |
S45C |
Feature
- LOWER ENERGY CONSUMPTION:
Three lobes' design control backflow pressure to rotor so it can reduce energy consumption.
- LOWER NOISE:
Pressure pluses are the major noise source of blower.
Three lobes' design can efficiently reduce noise by approximately 5dB.
- LONGER BEARING LIFE:
Less vibration transmitted through the lobe results approximately 20% longer bearing life.
(Conventional blowers result pressure pluses and vibration rob power and shorten the life of every bearing, gear and other drive train components.)
- Wide range for air volume, pressure and vacuum.
- Stable air flow and less pressure variation.
- Clean air and without oil moist.
- Construction simple and easy maintenance.
- Bearings are all lubricated by oil moist
Specification
The range of air volume, pressure and vacuum.- Bore: 25A~400A(1"~16")
- Capacity: 0.1~330 m3/min
- Pressure: 0~2 kgf/cm2
- Vacuum:0~-0.5 kgf/cm2
Application of the product
Used to agitate sediment for purification of water treatment plants
Waste Water Aeration
Reprocess goods absorption maintenance
Suction Fixing System
Electro-plate Tank
Used to transport wheat, grain or granule
Particles transport
Drying System
Cleaning System
Furnace
Suction Moving System
Printing press paper feed
Filtering System
Calculation of capacity and performance chart

Units Conversion
PRESSUREmbar |
Pa |
atm |
lbf/in2 |
kgf/cm2 |
in-Hg |
mmAq |
|
1 mbar |
1 |
102 |
9.869x10-4 |
1.45x10-2 |
1.02x10-3 |
2.953x10-2 |
10.197 |
1 Pa |
0.01 |
1 |
9.86x10-6 |
1.45x10-4 |
1.02x105 |
2.953x10-4 |
0.102 |
1 atm |
1.013x103 |
1.013x105 |
1 |
14.7 |
1.033 |
29.92 |
1.033x104 |
1 lbf/in2 |
68.95 |
6.8695x10-2 |
6.805x10-2 |
1 |
7.03x10-2 |
2.036 |
7.03x102 |
1 kgf/cm2 |
9.807x102 |
9.807x104 |
0.968 |
14.22 |
1 |
28.96 |
104 |
1 in-Hg |
33.86 |
3.368x103 |
3.342x10-2 |
0.491 |
3.45x10-2 |
1 |
3.45x102 |
1 mmAq |
9.807x10-2 |
9.807 |
9.677x10-5 |
1.42x10-3 |
10-4 |
2.896x10-3 |
1 |
CAPACITY
m3/min |
m3/hr |
1/min |
ft3/min |
|
1 m3/min |
1 |
60 |
1000 |
35.31 |
1 m3/hr |
0.017 |
1 |
16.67 |
0.589 |
1 l/min |
0.001 |
0.06 |
1 |
0.035 |
1 ft3/min |
0.028 |
1.699 |
28.32 |
1 |
kg-m/sec |
kW |
HP |
PS |
|
1 kg-m/sec |
1 |
0.01 |
0.013 |
0.013 |
1 kW |
101.97 |
1 |
1.341 |
1.360 |
1 HP |
76.038 |
0.746 |
1 |
1.014 |
1 PS |
75 |
0.736 |
0.968 |
1 |