Describe the working of rotary expander or rotary compressor (Explain any one only) with figure
Sure! Let's focus on explaining the working of a rotary compressor, also known as a rotary vane compressor, with the help of a figure.
A rotary compressor is a type of positive displacement compressor that uses a mechanism consisting of a rotor with vanes (also called blades) to compress gas or air. The rotary compressor is commonly used in applications that require continuous, high-pressure air supply, such as industrial processes and air conditioning systems.
Here is a step-by-step description of the working of a rotary compressor:
Step 1: The Figure:
(Please note that as a text-based AI, I can't display images or figures directly, but I will try my best to explain the steps using text description.)
Step 1.1: Imagine a cylindrical casing with an eccentrically mounted rotor inside it. The casing has an inlet port and an outlet port for the gas or air.
Step 1.2: The rotor has several vanes (usually four) that are held in position against the inner surface of the cylinder by springs or centrifugal force.
Step 1.3: The rotor is driven by a motor, causing it to rotate within the cylinder.
Step 2: Suction Stroke:
As the rotor rotates, one of the vanes comes in contact with the cylinder wall at the inlet port. This creates a small chamber between the vane, the rotor, and the cylinder.
Step 3: Suction Process:
During the suction stroke, the chamber expands as the rotor continues to rotate, creating a partial vacuum. This causes gas or air to be drawn into the chamber from the inlet port due to the pressure difference.
Step 4: Compression Stroke:
As the rotor further rotates, the vane moves away from the inlet port, reducing the chamber volume. This compression stroke reduces the chamber volume and compresses the gas or air inside.
Step 5: Discharge Process:
When the chamber volume becomes the smallest, the vane reaches the outlet port. The compressed gas or air is forced out of the chamber and discharged through the outlet port.
Step 6: Repeat:
The process of suction, compression, and discharge continues as the rotor keeps rotating, providing a continuous supply of compressed gas or air.
The figure would visually depict the movements and positions of the rotor, vanes, and the gas or air flow during each step of this working cycle.
I hope this description helps you understand the essential working principles of a rotary compressor!