![]({{media url="Structure_diagram_of_single_vane_compressor_Main_features_of_single_vane_compressor.jpg"}})
Structure diagram of single sliding vane compressor
The basic structure and working principle of single slide compressor. Single sliding vane compressor is also called scraper compressor or rolling rotor compressor. Its structure is shown in Figure 3-7. A cylindrical eccentric rotor (also called a piston) is installed in the cylinder, and the center of rotation of the rotor coincides with the center of the cylinder. In the middle of the upper part of the cylinder, a scraper that can slide up and down is installed. Due to the force of the spring, the lower part of the scraper always contacts the rotor surface. In this way, two closed working volumes are formed between the wiper blade and the outer surface of the rotor, the inner wall of the cylinder, and the end covers on both sides. The size of the volume changes periodically with the rotation of the rotor, thereby achieving suction, compression, Exhaust and expansion process. No air valve is provided at the intake port of the cylinder, and an air valve is provided at the exhaust port. In order to reduce the clearance volume, the exhaust port should be as close as possible to the blade. The rolling rotor and its shaft in the single-slider compressor are integral, with a shaft seal at one end and a centrifugal valve at the other end. In order to reduce the unbalanced mass inertia force when the eccentric rolling rotor rotates, the rotor is often made hollow.
![]({{media url="Structure_diagram_of_single_vane_compressor_Main_features_of_single_vane_compressor2.jpg"}})
In order to ensure the sealing of the contact between the eccentric rotor and the cylinder, the contact part of the rotor is made slightly flat, and a thin-walled elastic soft sleeve made of high-quality steel is sleeved on the outer surface of the rotor. There are many small holes on the front side of the soft sleeve contact line. During operation, the compressed vapor enters the flat space through the small hole, causing the soft sleeve to expand and cling to the cylinder wall. In this way, it not only guarantees good sealing, but also reduces wear.
Single vane compressor working process
Single vane compressor working process is shown in Figure 3-8. According to the order in the figure as follows: In Figure 3-8,
(a) shows that the blade starts to inhale on the left and starts to compress on the right;
(b) shows that the blade continues to inhale on the left and continues to compress on the right;
(c) shows that when the gas in the right chamber rises to a certain pressure, the exhaust valve opens to start exhausting, while the left side continues to inhale;
(d) shows that the right side of the blade is about to end the exhaust, and the left side continues to inhale;
(e) shows that the intake and exhaust are completed.
Main features of single vane compressor
The biggest advantage of the single vane compressor is that the clearance volume is small. Due to the oil injection lubrication in the cylinder, the clearance volume is almost filled with oil. Therefore, its gas transmission coefficient is higher than that of the reciprocating compressor, especially the compression is relatively large. Time is more significant.
Single vane compressors are often made into small fully enclosed types, and the refrigerants used are R22 and R502.