The advantages and disadvantages of screw air compressors and centrifugal air compressors, without understanding these, one does not know how to choose an air compressor. In the industrial field, screw air compressors and centrifugal air compressors are two common types of air compression equipment, each with unique advantages and disadvantages. This article will compare the characteristics of these two types of air compressors, hoping to be helpful for your choice.
The advantages and disadvantages of screw air compressors and centrifugal air compressors are mainly as follows:
The working principle of a screw air compressor is achieved by the volume change of the teeth grooves of the male and female rotors that are installed in parallel and mesh with each other inside the casing. The rotation of the rotor pair within its precisely matched casing causes periodic volume changes in the gas between the rotor teeth, which moves along the rotor axis from the suction side to the discharge side, completing the three working processes of suction, compression, and exhaust.
The main advantages of screw air compressors are:
·The initial investment cost of screw air compressors is relatively low;
·Small unit displacement volume, saving floor space;
·The exhaust temperature is low, and it can operate under high pressure ratio conditions.
The main disadvantages of screw air compressors are:
·Screw air compressors make a lot of noise during operation, which not only affects the health of workers but also the surrounding environment;
·It can only be used in the medium and low voltage range and cannot be used in high voltage situations;
·Due to the large number of components in screw air compressors, once a malfunction occurs, there will be a considerable number of parts that need to be replaced, which means that maintenance costs will be relatively high.
Centrifugal air compressor is a type of turbine air compressor. The working principle of a centrifugal air compressor is that when the centrifugal air compressor is started, the motor drives the rotor to rotate at high speed, and the blades on the impeller rotate accordingly. At this time, the gas is thrown towards the diffuser under the action of the impeller, and the pressure is increased under the action of centrifugal force. At the same time, a vacuum zone is formed at the impeller, allowing fresh gas from the outside to continuously enter the impeller. During this process, the gas is continuously sucked in, compressed, and discharged, thereby achieving continuous flow and compression of the gas.
The main advantages of centrifugal air compressors are:
·Large exhaust volume, uniform exhaust, and no pulse of airflow;
·High rotational speed;
·Lubrication is not required inside the machine;
·Good sealing effect and minimal leakage;
·Has a flat performance curve and a wide operating range;
·Easy to achieve automation and scalability;
·Less vulnerable parts, less maintenance required, and longer operating cycle;
Disadvantages:
There is a surge phenomenon, which poses great harm to the machine.
Scope of application:
Large and medium flow, medium and low pressure situations.
The above content is an introduction to the advantages and disadvantages of screw air compressors and centrifugal air compressors. When choosing an air compressor, users should consider their own needs and budget. For applications that require high flow, high pressure, and oil-free compressed air, the Turbo-Tech centrifugal air compressor is undoubtedly the ideal choice.
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