About Screw Blower
Main characteristics:
- The male and female rotors of oil-free screw blower are precisely
designed. Compared with Roots blower, it can achieve internal
compression in the cavity, with higher efficiency and 20% higher
energy saving performance under the same energy consumption
conditions.
- Stable airflow, less airflow fluctuation when pressure changes .
- Applicable to higher pressure, low noise.
- Available with PLC intelligent remote control and different
communication methods, convenient for operation management.
The screw blower achieves internal compression during the air
transportation in the cavity, so the screw blower has most of the
advantages of traditional blowers, and at the same time has higher
efficiency.
The process of air transportation and compression is continuous and
progressive, so the airflow pulsation is lower, and the exhaust
noise and temperature control are better than traditional blowers.
As a new type of rotary blower developed in recent years, screw
blowers have begun to be applied in aeration, gas-water
back-washing, oxidative de-sulfurization,
fluidization/homogenization process, and pneumatic conveying due to
their simple structure, stability, energy saving and low noise.
Dimension and other data
| Model | BLG115LA |
| Lenght (mm) | 1945 |
| Width (mm) | 1100 |
| Height (mm) | 1494 |
| Outlet size | DN150 |
| Weight (kg) | 1000 |
| Noise (dB) | 80 |
Composition
The screw blower is composed of blower enclosure, blower main body,
motor, air filter, silencer, an oil pump tank and oil filter.
As the core component of the screw blower, the structure of the
blower main body directly determines the blower’s performance. The
main body is composed of casing, screw rotors, gear box, bearings,
shaft seals, ect.
Working Principle
The operating principle of the screw blower is that two parallel
female and male rotors mesh with each other in the "∞"-shaped
cylinder to form a working volume. Through the synchronous gear,
the rotor rotates at high speed in the opposite direction, and the
working volume changes periodically as the rotor rotates, realizing
air compression during air transportation. The working cycle of
screw blower can be divided into three processes: suction,
compression and exhaust. The cycle process is as follows:
1. Suction process
Picture ① : The air enters the volume between the teeth of the
rotor through the suction port. As the rotor rotates, the volume
between the teeth continuously expands.
Picture ② : When the volume between the teeth reaches the maximum,
the volume between the teeth is disconnected from the suction port
and the suction process ends.
2. Compression process
Picture ③: during compressing
3. Exhaust process
Picture ④: After the inter-tooth volume is connected to the exhaust
port, the exhaust process begins. During the rotation of the rotor,
the volume between the teeth continuously decreases, sending the
compressed air to the exhaust pipe. This process continues until
the volume reaches designed data.
Features:
Low energy consumption
By adopting the principle of thermal adiabatic compression, the
oil-free screw blower’s total efficiency is higher than 75%, and is
20%-35% higher than traditional blowers. Also it is featured with
higher exhaust pressure and lower pressure pulse.
Low noise
The aerodynamic noise of the screw rotor is very small, and the
output is stable, which eliminates the sudden release of internal
air. The wave-shaped inlet and the vent minimize the airflow
fluctuations, and the noise of the blower is less than that of the
traditional type.
Intelligent Control
Intelligent PLC control, remote control and multiple communication
modes are available, which is convenient for operation and
maintenance.
Low cost
The optimized structural design enables less energy consumption and
ensures the durability of the product. At the same time, the unit
of light wight (load) runs smoothly without special infrastructure
so that save cost for customers.
