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Technical

Technology and Theorem of Longtech’s Roots Blower

三葉式魯氏鼓風機

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.

The Principle of Longtech'sRoots Blower
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:

  1. air input
  2. embraced by cylinder and rotor
  3. air discharge.
Construction
MATERIALS
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

  1. LOWER ENERGY CONSUMPTION:
    Three lobes' design control backflow pressure to rotor so it can reduce energy consumption.

  2. LOWER NOISE:
    Pressure pluses are the major noise source of blower.
    Three lobes' design can efficiently reduce noise by approximately 5dB.
  3. 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.)
  4. Wide range for air volume, pressure and vacuum.
  5. Stable air flow and less pressure variation.
  6. Clean air and without oil moist.
  7. Construction simple and easy maintenance.
  8. Bearings are all lubricated by oil moist

Specification

The range of air volume, pressure and vacuum.
  1. Bore: 25A~400A(1"~16")
  2. Capacity: 0.1~330 m3/min
  3. Pressure: 0~2 kgf/cm2
  4. Vacuum:0~-0.5 kgf/cm2

Application of the product

APPLICATIONS
  • 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

PRESSURE
mbar
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
POWER
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

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