"Screw compressor head" typically refers to the core compression component of equipment such as air compressors and Roots blowers. Its working principle involves the high-speed rotation and meshing of internal rotors to achieve air intake, compression, and exhaust. As the "heart" of the air compressor, this type of head directly determines the equipment's air production efficiency and stability.
Taking the most common screw air compressor head as an example, its working process consists of three stages:
Intake stage: The motor drives the male rotor to rotate, and the female rotor meshes synchronously. The meshing gap between the rotors gradually increases, forming a negative pressure chamber. Outside air, filtered by the filter, is drawn into the compressor head.
Compression stage: The rotors continue to rotate, and the meshing gap gradually decreases. The intake air is continuously compressed, its volume decreases, and its pressure increases. Simultaneously, lubricating oil is sprayed into the compressor head, providing lubrication, cooling, and sealing.
Exhaust Stage: When air is compressed to the rated pressure (e.g., 0.7–1.0 MPa), the exhaust port opens, and the high-pressure air, along with lubricating oil, is discharged into the oil-gas separation system. After separation, pure compressed air is output for use.
The core of the compressor head consists of three main components:
Rotor Assembly: The male and female rotors mesh at high speed, forming the power core of the compressed air;
Bearing Assembly: Supports the rotor's high-speed and stable operation, preventing misalignment;
Sealing Assembly: Prevents air and oil leaks, ensuring compression efficiency and equipment cleanliness.