About the classification of compressors
Compressors are classified as follows according to different structural forms:
According to its principle, it can be divided into: reciprocating (piston) compressor, rotary (rotary) compressor (turbine, water ring, turbine) compressor, axial compressor, jet compressor and screw Compressors and other types, of which reciprocating (piston) compressors are widely used.
How to classify piston compressors?
There are many ways to classify piston compressors, and the names are also different. Usually there are several classification methods as follows:
(1) According to the cylinder position of the compressor, it can be divided into:
(1) For horizontal compressors, the cylinders are all horizontal.
(2) The cylinders of vertical compressors are all arranged vertically (vertical compressors).
(3) Angle compressor, the cylinders are arranged in different angles such as L-shaped, V-shaped, W-shaped and star-shaped.
(2) According to the number of compressor cylinder sections (stages), it can be divided into:
(1) Single-stage compressor (single-stage): The gas is compressed once in the cylinder.
(2) Two-stage compressor (two-stage): The gas is compressed twice in the cylinder.
(3) Multi-stage compressor (multi-stage): The gas is compressed multiple times in the cylinder.
(3) According to the cylinder arrangement method, it can be divided into:
(1) Tandem compressor: a multi-stage compressor with several cylinders arranged in sequence on the same shaft, also known as a single-row compressor.
(2) Parallel compressor: a multi-stage compressor with several cylinders arranged in parallel on several shafts, also known as double-row compressors or multi-row compressors.
(3) Compound compressor: A multi-stage compressor is composed of series and parallel type.
(4) Symmetrically balanced compressor: the cylinders are arranged horizontally on both sides of the crankshaft whose crankshaft journals are 180 degrees each other, arranged in an H shape, and its inertial forces can basically be balanced. (Large compressors are all developing in this direction).
(4) According to the compression action of the piston, it can be divided into:
(1) Single-acting compressor: The gas is compressed only on one side of the piston, also known as a single-acting compressor.
(2) Double-acting compressor: The gas can be compressed on both sides of the piston, also known as double-acting or multi-acting compressor.
(3) Multi-cylinder single-acting compressor: A compressor with multiple cylinders that uses one side of the piston for compression.
(4) Multi-cylinder double-acting compressor: A compressor with multiple cylinders that uses both sides of the piston for compression.
(5) According to the compressor's final discharge pressure, it can be divided into:
(1) Low-pressure compressor: the final pressure of exhaust is 3-10 gauge pressure.
(2) Medium-pressure compressor: The final pressure of exhaust is 10-100 gauge pressure.
(3) High-pressure compressor: The final pressure of exhaust is 100-1000 gauge pressure.
(4) Ultra-high pressure compressor: The final exhaust pressure is above 1000 gauge pressure.
(6) According to the compressor displacement, it can be divided into:
(1) Micro compressor: The gas delivery volume is below 1 m3/min.
(2) Small compressors: the air delivery volume is below 1-10m3/min.
(3) Medium-sized compressor: The gas delivery volume is between 10m3/min and 100m3/min.
(4) Large-scale compressor: the gas delivery capacity is 100 m3/min.
(7) According to the speed of the compressor, it can be divided into:
(1) Low-speed compressor: below 200 rpm.
(2) Intermediate speed compressor: at 200～450 rpm/at 50 minutes.
(3) High-speed compressor: 450～1000 rpm.
(8) According to the type of transmission, it can be divided into:
(1) Electric compressor: those powered by electric motors;
(2) Pneumatic compressor: those powered by steam engines;
(3) Compressors powered by internal combustion engines;
(4) Compressor powered by steam turbine.
(9) According to the cooling method, it can be divided into:
(1) Water-cooled compressor: Uses the circulating flow of cooling water to conduct heat during the compression process.
(2) Air-cooled compressor: use its own wind to conduct heat during compression through the heat sink.
(10) According to the transmission method of power machine and compressor, it can be divided into:
(1) The steel body coupling directly drives the compressor or is called close-joining compressor.
(2) The flexible coupling directly drives the compressor.
(3) Reduction gear drive compressor.
(4) Belt (flat belt or triangle belt) drives the compressor.
(5) Free piston compressor without crankshaft-connecting rod mechanism.
(6) Compressor with positive structure-namely, a compressor in which the cylinder of the motor compressor and the compressor base are integrally made, and a common crankshaft is used.
In addition, compressors are divided into fixed and mobile types, and there are cross heads and no cross heads.