An expander is a device used to reduce the pressure of gas or liquid and convert it into mechanical energy
Category: Industry News
Time:2023-12-10
The expander plays a crucial role in deep low-temperature equipment. Its working principle is to output mechanical work when compressed gas expands and depressurizes, thereby lowering the gas temperature. There are various classifications of expanders, mainly categorized by their motion form and structure. Here are some common types of expanders:
1. Piston Expander
The piston expander is a device that allows gas to expand in a variable volume, thereby outputting external work for refrigeration. It is usually driven by an electric motor to absorb external work. This type of expander is divided into vertical and horizontal structures. The vertical structure is the most common form, where components such as the crankshaft, connecting rod, crosshead, piston, intake valve, and exhaust valve are all moving parts, and its working principle is similar to that of a reciprocating piston compressor. The opening and closing of the intake and exhaust valves are controlled by a specific mechanism to achieve the compression and expansion process of the gas.
2. Turbine Expander
The turbine expander is another common type of expander. Unlike the piston expander, the turbine expander uses the centrifugal force or axial flow force of the gas to drive the turbine to rotate, thus achieving the gas expansion process. The turbine expander has advantages such as simple structure, stable operation, and high efficiency, making it widely used in large deep low-temperature equipment.
3. Other Types
In addition to piston and turbine types, there are other types of expanders, such as screw expanders and membrane expanders. Each of these expanders has its own characteristics and application fields. For example, screw expanders have advantages such as simple structure and easy maintenance, making them suitable for medium and small deep low-temperature equipment; membrane expanders, due to their unique structure and working principle, have higher efficiency under specific working conditions.
In summary, the classification of expanders is mainly based on their motion form and structure. Different types of expanders have different characteristics and application fields, and choosing the right expander is crucial for the operation of deep low-temperature equipment. In practical applications, it is also necessary to select based on specific working conditions and requirements to ensure the normal operation and high efficiency of the equipment.
key word: An expander is a device used to reduce the pressure of gas or liquid and convert it into mechanical energy
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