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Working principle of rolling rotor compressor
Rolling rotor compressor is a volume type rotary compressor. The change of the working volume of the cylinder is achieved by the rolling of the cylindrical rotor of the cylinder in the cylinder by an eccentric device.
1. The rotor rotates once, and will complete the compression and exhaust process of the previous working cycle and the suction process of the next working cycle;
2. Since there is no steam inlet valve, there is a strict correspondence between the timing of the start of suction and the position of the suction port on the cylinder, which does not change with the change of working conditions;
3.Due to the installation of the exhaust valve, the timing of the end of compression will vary with the pressure change in the exhaust pipe.
Advantages of rolling rotor compressor
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1. The structure is simple, the volume is small, and the weight is light. Compared with the piston compressor, the volume can be reduced by 40% to 50%, and the weight can also be reduced by 40% to 50%;
2. Fewer parts, especially less wearing parts, and less friction loss between relative moving parts, so the reliability is higher;
3. Only the slider has a small reciprocating inertial force, the rotating inertial force can be completely balanced, the rotation speed can be higher, and the vibration is small, and the operation is stable;
4. No suction valve, long suction time, small clearance volume, and direct suction, reducing harmful overheating of the suction, so its high efficiency. However, its processing and assembly accuracy requirements are high. Because there is no gas valve, it can be used to transport dirty and process gas with droplets and dust.
shortcomings of rolling rotor compressor
The main disadvantage of rotary compressors is the large leakage, friction and wear between the sliding plate and the cylinder wall surface, which limits its working life and efficiency improvement; and this compressor requires higher processing accuracy. If a double-layer slide is used, both ends of the two slides keep in contact with the inner wall of the cylinder during operation to form two seal lines, and an oil seal is formed between the two seal lines, which greatly reduces the leakage loss at the end of the slide. Reduce friction and friction loss, so that the working life and efficiency of the machine are improved.
Once the compressor wears on its bearings, main shaft, rollers or sliding plates, and the gap increases, it will immediately have a more obvious adverse effect on its performance, so it is usually used in the refrigerator and air conditioner assembled in the factory. In the device, a high degree of cleanliness is also required in the system.