This standard gives the classification and definition of various types of compressors. This standard applies to compressors, i.e. machines for conveying and compressing gaseous media at various pressures, but does not include ventilators and vacuum pumps. GB/T 4976-1985 Compressor Classification GB/T4976-1985 Standard Download Decompression Password: www.bzxz.net

National Standard of the People's Republic of China
Compressors-Classification
This standard is equivalent to the international standard [S05390-1977 "Compressor Classification" Scope of application
UDC 621.51
GB 4976-85
ISO5390-1977
This standard gives the classification and definition of various types of compressors. In Appendix A (Supplement), a Chinese, English and French comparison table of certain types of compressor terms is listed and illustrated with a simple diagram. This standard applies to compressors, that is, machines for conveying and compressing gaseous media under various pressures, but does not include ventilators and vacuum pumps. 2 General classification
The general classification of compressors is shown in the figure.
Wax machine
Bent type end press
Reciprocating straightening machine
Axis oxygen driven
Self-propelled electrician
Other types
Rotary pressbZxz.net
Rotary or
Shaking machine
National Bureau of Standards 1985-03-04 issued
Double shaft or multi-shaft
Other types
Turbine compressor
Dynamic compressor
Hour device
On-flow (centrifugal)
Double valve
Other types
Other types
1985-12-01 implementation
3 Definition
GB4976-85
3.1 Positive displacement compressor: A compressor that sequentially draws a certain volume of gas into and out of a closed space to increase static pressure through the displacement of moving parts.
Note: Compression may or may not be internal compression. If it is internal compression, the pressure ratio may be fixed or variable. 3.1.1 Shaft-driven reciprocating compressor: A positive displacement compressor that achieves gas suction and compression by causing the moving parts to make reciprocating linear motion in the compression chamber due to the rotation of the shaft. 3.1.2 Rotary compressor; A positive displacement compressor whose moving parts are one or more rotors moving in a cylinder. The displacement volume is achieved by the movement of the vanes, one or more meshing parts, components, or the rotor itself. 3.2 Dynamic compressor: A compressor that increases the pressure of the gas by converting its kinetic energy into potential energy as the gas flows continuously from the inlet to the outlet.
3.2.1 Turbine compressor: A dynamic compressor with rotating blades, impellers or wheels. Note: Turbine compressors with effective exhaust pressures below 2×105Pa (2bar) are usually called "turbo blowers". 3.2.1.1 Axial flow turbine compressor: A turbine compressor that converts kinetic energy in a rotating impeller and diffuser with blades installed in a basically axial flow.
3.2.1.2 Radial flow turbine compressor or centrifugal compressor: A turbine compressor that converts kinetic energy in an impeller and diffuser with a basically radial flow.
Note: There are also mixed-flow turbine compressors (in which the gas flows in a direction between the axial and radial directions) and combined turbine compressors 3.2.2 Ejectors: Dynamic compressors that have no moving elements and achieve compression by converting the kinetic energy of the auxiliary fluid. A.1 Crankshaft reciprocating piston compressors
GB4976—85
Appendix A
Terms and schematic diagrams of certain types of compressors
(Supplement)
Crankshaftpiston reciprocatingcompressorCompresseur alternatif a piston entraine in a systeme bjelle et menivelleA.1.1 Single-acting or double-acting (see Figure A 1)
Asimpleetfetouadoubieeffet
Note: The arrow indicates the direction of movement. A.1.2 With or without crosshead A.1.3 Single stage or multistage A.1.4 Air or water cooled Air or water cooled Refrigerant with air or water cooling GB 4976-85 A.1.5 Horizontal, vertical or other type (V, W, L) (see Figure A2) L) Horizontal opposed type
A.1.6 Lubricated or non-lubricated
Lubricated or non-lubricatedLubrifie ou sec
Vertical step-down piston type (with additional stage)
Engine
City compressor
Integral ring type
Note: There are different types of pistons. The piston can have several different cross-sectional working areas. According to the arrangement adopted, they are called "differential pistons" or "step-down pistons".
A ,2 Shaft piston compressor
Shaft piston compressor
Compresseur a piston entraine parallel to the axisA.2.1 Swashplate driven
Swashplate driven
Type a barillet
A.3 Diaphragm compressor
Diaphragm
compressor:
Comprasseur a membrane
A.3.1 Single-stage or multistage
GB 4976-85
Single - stage or multistagtMonoetage ou multietage
,3,2 Air or water cooled
Refrojdi i 'air ou A.3.3 Diaphragm actuation direct or hydraulic 'Command of membrane direct or hydraulicA,4 Reciprocating compressor without trankshaftCompresseur alternatif a piston with no crankshaft and manipulator systemA.4.1 Free piston
Free piston type
A piston free
A.4.2 Electromagnetically actuated piston (see Figure A3)
With electromagnetically actuated pistonA vibrator electromagnetique
A.6 Rotary compressor
Compresseur volumetric rotationA.5.1 Single-stage or multi-stage
Single-stage compressor multistage
Manoetage or multistage
A.5.2 Air or liquid cooled
Refroldj a I'air ou ? I'aide d'un liquidA .5.3 Horizontal or vertical
Horizontal or vertica!
.GB4976—85
A.5.4 Lubricated, non-lubricated or liquid floodedLubricated, second or thirdA.6 Turbocompressor . radial flowTurbocompresseur centrifuge
A.6.1 Single entry or double entryA simple flux or double fluxA.6.2 Single- stage or multistage
Monoetage or multietage
A.6.3 Overhung impellerWith overhung impeller(s)Avec roue(s) a reusable impeller porte-a-fauxA.6.4 With internal or external coolingA refroidissement interieur ou exterieurA.6.5 Horizontal or vertical split casing or barrelCarter i plan de joint horizontal , vertical ou (type tonneau 》A.7 Turbocompressor., axial flowTur bocompresseur axial
A.7.1 Horizontal or vertical split casingCarter a plan de joint horizontal ou verticalAdditional notes;
This standard was proposed by the Ministry of Machinery Industry of the People's Republic of China and is under the jurisdiction of the Hefei General Machinery Research Institute of the Ministry of Machinery Industry. This standard was drafted by the Hefei General Machinery Research Institute of the Ministry of Machinery Industry. The drafter of this standard is Chen Xiangting.
This standard is interpreted by the Hefei General Machinery Research Institute of the Ministry of Machinery Industry.
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