Volumetric compressors operate by directly compressing gas to increase its pressure, reducing the volume of the gas. These types of compressors are categorized into two main types based on the movement of the piston within the cylinder: rotary and reciprocating. Most air compressors used in oxygen chambers, such as those produced by Shijiazhuang Cold Storage, fall under the volumetric category.
One of the key challenges in dry screw air compressors is rotor deformation. The performance of these machines is highly dependent on the sealing clearance between the rotors when they engage. Multiple leakage paths exist between the rotors themselves, as well as between the rotors and the casing. Fluid leakage through these gaps significantly affects both volumetric efficiency and overall system efficiency.
During operation, the rotors experience thermal and mechanical deformation due to heat and stress. This deformation causes the actual running clearance to differ from the designed gap. If the clearance is too large, more leakage occurs, reducing the compressor's efficiency. On the other hand, if the clearance is too small, it can lead to overheating, burning, or even seizure of the rotor teeth.
Although the overall temperature difference across the rotor is not extreme, there is still a variation in radial deformation along the length of the rotor. This is mainly due to the complex shape of the rotor, which features spiral teeth and grooves rather than a perfectly axisymmetric structure. Analysis of the radial deformation along the contact line shows that while there may be differences in deformation along the axial direction, the total deformation of both the male and female rotors remains relatively consistent. Furthermore, the total deformation increases linearly with temperature. Since dry screw compressors tend to produce higher discharge temperatures, it is essential to either increase the design clearance or implement cooling measures to prevent rotor damage or tooth failure.
Another common issue in dry screw compressors is coating failure. Inferior coatings applied to the rotors may deteriorate over time, exposing the metal surface to airborne contaminants and temperature fluctuations. This exposure can lead to reduced performance or even machine failure. The application of anti-corrosion coatings is a challenging process, and modern solutions often include materials like molybdenum disulfide, polytetrafluoroethylene (PTFE), and molybdenum-based coatings.
This article was originally published by Deslan Compressor (Shanghai) Co., Ltd., a member of the Shanghai Air Compressor Association. Please cite the source and acknowledge the copyright.
Http://news.chinawj.com.cn Submission.
A mini air valve is a small, compact valve used to control the flow of air in a system or device. It is typically designed to be lightweight and space-saving, making it suitable for applications where size and weight are critical factors.
mini air release valve,micro air valve,dc 3v air valve,dc 6v air valve,mini air control valve
Shenzhen DYX Technology Co.,Limited , https://www.dyxpump.com