![]({{media url="The_principle_of_centrifugal_compressor_structure.jpg"}})
Centrifugal compressor is composed of rotor, stator and bearing. The impeller and other parts are sleeved on the main shaft to form a rotor. The rotor is supported on the bearing and driven by the power machine to rotate at high speed. The stator includes components such as casing, partitions, seals, air intake chamber and volute chamber. Fixing elements such as diffusers, bends and recirculators are formed between the partitions. A centrifugal compressor with only one impeller is called a single-stage centrifugal compressor, and a centrifugal compressor with more than two impellers is called a multi-stage centrifugal compressor (see figure). The stage is composed of the impeller and the diffuser and other channels behind it. Impeller is the key component of centrifugal compressor, there are three types: closed, semi-open and open. The closed impeller is composed of blades, wheel cover and disc. The semi-open impeller has no wheel cover and has a roulette. The open impeller has no wheel cover and disc, and the impeller is on the shaft. When the impeller rotates at high speed, due to the force interaction between the blade and the gas, mainly due to the centrifugal force, the gas is sucked from the center of the impeller and flows to the outer edge of the impeller along the blade channel (the channel between the blades). The impeller works on the gas, the gas gains energy, and the pressure and speed increase. Then, the gas flows through channels such as a diffuser, the speed decreases, and the pressure further increases, that is, the kinetic energy is converted into pressure energy. The gas flowing out of the diffuser enters the volute chamber and is transported out, or enters the next stage through the bend and the recirculator to continue compression. During the entire compression process, the specific volume of the gas decreases and the temperature increases. As the temperature increases, the compressed gas needs to consume more energy. To save power, multi-stage centrifugal compressors often use intermediate cooling when the pressure ratio is greater than 3. Groups of stages separated by intermediate cooling are called segments. The gas enters the intercooler from the previous section, and after cooling to reduce the temperature, it enters the next section to continue compression. The intercooler generally uses water cooling. The part contained in each cabinet is called a cylinder. The centrifugal blower has a low exhaust pressure, so it is generally a single-cylinder structure without intermediate cooling.
What is the use of centrifugal compressor
In the centrifugal compressor, the high-speed rotating impeller gives the centrifugal force of the gas and the diffuser of the gas in the diffuser channel to increase the gas pressure. In the early days, because this compressor was only suitable for low, medium pressure and large flow, it was not noticed by people. Due to the development of the chemical industry, the establishment of various large-scale chemical plants and refineries, centrifugal compressors have become a key machine for compressing and transporting various gases in chemical production, and occupy an extremely important position. With the achievement of gas dynamics research, the efficiency of centrifugal compressors has been continuously improved, and due to the high-pressure sealing, the processing of small flow and narrow impellers, and the development of key technologies such as multi-oil wedge bearings, the high pressure and wide A series of problems in the development of the flow range greatly expand the application range of the centrifugal compressor, so that it can replace the reciprocating compressor in many occasions, and greatly expand the application range. The pressure of industrial high-pressure centrifugal compressors is (150~350)×105Pa, and the pressure of centrifugal compressors for gas injection in offshore oilfields is as high as 700×105Pa. The flow rate of the centrifugal blower used for blast furnace blasting is as large as 7000m3/min, the power is 52900KW, and the rotation speed is generally above 10000r/min.
Some basic chemical raw materials, such as propylene, ethylene, butadiene, benzene, etc., can be processed into important chemical products such as plastics, fibers, and rubber. In petrochemical plants that produce this basic raw material, centrifugal compressors also occupy an important position and are one of the key equipment. In addition, in other industries such as petroleum refining and refrigeration, centrifugal compressors are also extremely critical equipment.
Application development of centrifugal compressor
We all know that centrifugal compressors are typical representatives of speed compressors. In the case of the same cooling capacity, especially in the case of large capacity, compared with the screw compressor unit, the huge oil separation device is omitted, the weight and size of the unit are small, and the floor space is small; the centrifugal compressor has a simple and compact structure. Fewer moving parts, reliable operation, durable, low operating cost; easy to achieve multi-stage compression and multiple evaporation temperatures, easy to achieve intermediate cooling, resulting in low power consumption; very little lubricant mixed in the centrifugal unit, the heat exchanger The effect of heat transfer is less, and the unit has higher efficiency. Combining these characteristics, let's take a look at the better applications of centrifugal compressors.
At present, the centrifugal compressors used in domestic centrifugal chillers are mainly from Trane, Carrier, York and other brands. With the development of society, the amount of cooling required by users is getting higher and higher. In addition, due to the requirements of energy saving, centrifugal compressor units have an increasingly wider market. Some domestic air-conditioning manufacturers such as Haier, Aucma, Gree and Midea have launched their own centrifugal chillers. With the general trend of energy saving and consumption reduction, China's urbanization level continues to increase, and building energy consumption is also increasing. The centrifugal chiller with the highest performance coefficient will undoubtedly become a hot spot in the market. In recent years, the sales of centrifugal chillers have continuously increased. Demand for refrigeration compressors is also increasing significantly.
Most domestic enterprises that develop centrifugal chillers only buy imported compressors, and basically have no profit. Foreign centrifuge manufacturers will not easily transfer their core technologies. To develop centrifugal refrigeration compressors, they have to take the path of independent development. With the continuous maturity of design and manufacturing technology, the development of domestic centrifugal refrigeration compressors has become possibleThe principle of centrifugal compressor structure
Centrifugal compressor is composed of rotor, stator and bearing. The impeller and other parts are sleeved on the main shaft to form a rotor. The rotor is supported on the bearing and driven by the power machine to rotate at high speed. The stator includes components such as casing, partitions, seals, air intake chamber and volute chamber. Fixing elements such as diffusers, bends and recirculators are formed between the partitions. A centrifugal compressor with only one impeller is called a single-stage centrifugal compressor, and a centrifugal compressor with more than two impellers is called a multi-stage centrifugal compressor (see figure). The stage is composed of the impeller and the diffuser and other channels behind it. Impeller is the key component of centrifugal compressor, there are three types: closed, semi-open and open. The closed impeller is composed of blades, wheel cover and disc. The semi-open impeller has no wheel cover and has a roulette. The open impeller has no wheel cover and disc, and the impeller is on the shaft. When the impeller rotates at high speed, due to the force interaction between the blade and the gas, mainly due to the centrifugal force, the gas is sucked from the center of the impeller and flows to the outer edge of the impeller along the blade channel (the channel between the blades). The impeller works on the gas, the gas gains energy, and the pressure and speed increase. Then, the gas flows through channels such as a diffuser, the speed decreases, and the pressure further increases, that is, the kinetic energy is converted into pressure energy. The gas flowing out of the diffuser enters the volute chamber and is transported out, or enters the next stage through the bend and the recirculator to continue compression. During the entire compression process, the specific volume of the gas decreases and the temperature increases. As the temperature increases, the compressed gas needs to consume more energy. To save power, multi-stage centrifugal compressors often use intermediate cooling when the pressure ratio is greater than 3. Groups of stages separated by intermediate cooling are called segments. The gas enters the intercooler from the previous section, and after cooling to reduce the temperature, it enters the next section to continue compression. The intercooler generally uses water cooling. The part contained in each cabinet is called a cylinder. The centrifugal blower has a low exhaust pressure, so it is generally a single-cylinder structure without intermediate cooling.
What is the use of centrifugal compressor
In the centrifugal compressor, the high-speed rotating impeller gives the centrifugal force of the gas and the diffuser of the gas in the diffuser channel to increase the gas pressure. In the early days, because this compressor was only suitable for low, medium pressure and large flow, it was not noticed by people. Due to the development of the chemical industry, the establishment of various large-scale chemical plants and refineries, centrifugal compressors have become a key machine for compressing and transporting various gases in chemical production, and occupy an extremely important position. With the achievement of gas dynamics research, the efficiency of centrifugal compressors has been continuously improved, and due to the high-pressure sealing, the processing of small flow and narrow impellers, and the development of key technologies such as multi-oil wedge bearings, the high pressure and wide A series of problems in the development of the flow range greatly expand the application range of the centrifugal compressor, so that it can replace the reciprocating compressor in many occasions, and greatly expand the application range. The pressure of industrial high-pressure centrifugal compressors is (150~350)×105Pa, and the pressure of centrifugal compressors for gas injection in offshore oilfields is as high as 700×105Pa. The flow rate of the centrifugal blower used for blast furnace blasting is as large as 7000m3/min, the power is 52900KW, and the rotation speed is generally above 10000r/min.
Some basic chemical raw materials, such as propylene, ethylene, butadiene, benzene, etc., can be processed into important chemical products such as plastics, fibers, and rubber. In petrochemical plants that produce this basic raw material, centrifugal compressors also occupy an important position and are one of the key equipment. In addition, in other industries such as petroleum refining and refrigeration, centrifugal compressors are also extremely critical equipment.
Application development of centrifugal compressor
We all know that centrifugal compressors are typical representatives of speed compressors. In the case of the same cooling capacity, especially in the case of large capacity, compared with the screw compressor unit, the huge oil separation device is omitted, the weight and size of the unit are small, and the floor space is small; the centrifugal compressor has a simple and compact structure. Fewer moving parts, reliable operation, durable, low operating cost; easy to achieve multi-stage compression and multiple evaporation temperatures, easy to achieve intermediate cooling, resulting in low power consumption; very little lubricant mixed in the centrifugal unit, the heat exchanger The effect of heat transfer is less, and the unit has higher efficiency. Combining these characteristics, let's take a look at the better applications of centrifugal compressors.
At present, the centrifugal compressors used in domestic centrifugal chillers are mainly from Trane, Carrier, York and other brands. With the development of society, the amount of cooling required by users is getting higher and higher. In addition, due to the requirements of energy saving, centrifugal compressor units have an increasingly wider market. Some domestic air-conditioning manufacturers such as Haier, Aucma, Gree and Midea have launched their own centrifugal chillers. With the general trend of energy saving and consumption reduction, China's urbanization level continues to increase, and building energy consumption is also increasing. The centrifugal chiller with the highest performance coefficient will undoubtedly become a hot spot in the market. In recent years, the sales of centrifugal chillers have continuously increased. Demand for refrigeration compressors is also increasing significantly.
Most domestic enterprises that develop centrifugal chillers only buy imported compressors, and basically have no profit. Foreign centrifuge manufacturers will not easily transfer their core technologies. To develop centrifugal refrigeration compressors, they have to take the path of independent development. With the continuous maturity of design and manufacturing technology, the development of domestic centrifugal refrigeration compressors has become possibleSubscribe to relevant news content?
Subscription
Unsubscription
Recent related posts
06/21/2020
The principle of centrifugal compressor structure
The principle of centrifugal compressor structure Structure principle of centrifugal compressor <img src="{{media url="The_principle_of_centrifugal_compressor_structure.jpg"}}" alt="" /> Centrifugal compressor is composed of rotor, stator and bearing. The impeller and other parts are sleeved on the main shaft to form a rotor. The rotor is supported on the bearing and driven by the power machine to rotate at high speed.
06/21/2020
Advantages of rolling rotor compressors_Disadvantages of rolling rotor compressors
Advantages of rolling rotor compressors_Disadvantages of rolling rotor compressors Rolling rotor compressor, also known as rolling piston compressor or fixed vane compressor, is a type of rotary compressor. <img src="{{media url="Advantages_of_rolling_rotor_compressors_Disadvantages_of_rolling_rotor_compressors.jpg"}}" alt="" /> 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.
06/21/2020
Which is better, semiconductor refrigeration and compressor refrigeration
Which is better, semiconductor refrigeration and compressor refrigeration <img src="{{media url="o4YBAF3LcwuAC1ILAAEzxLDPcHA979.jpg"}}" alt="" />Semiconductor refrigeration Semiconductor refrigerator refers to a device that uses the thermo-electric effect of semiconductor to produce cooling capacity, also known as thermoelectric refrigerator. Connect two different metals with conductors, and connect direct current, then the temperature at one contact will decrease and the temperature at the other contact will increase.
06/21/2020
Will the air compressor explode_The cause and measures of air compressor explosion
Will the air compressor explode_The cause and measures of air compressor explosion Will the air compressor explode <img src="{{media url="Will_the_air_compressor_explode_The_cause_and_measures_of_air_compressor_explosion.jpg"}}" alt="" /> The air compressor will explode. However, air compressors are not easy to explode. The accident rate of the air storage tank of the piston type air compressor is very small. Only when the air pressure switch and the safety valve of the air compressor are broken at the same time will the air compressor have the possibility of explosion.
06/21/2020
Common faults and maintenance of air compressor
Common faults and maintenance of air compressor <img src="{{media url="Common_faults_and_maintenance_of_air_compressor.jpg"}}" alt="" /> Common faults and maintenance of air compressor Air compressors are widely used in various industries with the development of technology, but no matter what type of air compressor, there will be some problems in the process of use. The following editors will now introduce some common faults and maintenance methods, let's take a look.
06/21/2020
Air compressor selection_air compressor parameters
Air compressor selection_air compressor parameters Air compressor selection <img src="{{media url="Air_compressor_selection_air_compressor_parameters.jpg"}}" alt="" /> How to choose an air compressor in a reasonable way should comprehensively consider the comprehensive technical and economic indicators such as the investment and operating costs of the air compressor unit and the air compressor station, so that it conforms to the principles of economy, safety and application. Specifically, there are the following aspects:
06/21/2020
The basic structure of piston compressor_Composition system of piston compressor
The basic structure of piston compressor_Composition system of piston compressor Basic structure of piston compressor <img src="{{media url="The_basic_structure_of_piston_compressor.jpg"}}" alt="" /> Piston refrigeration compressor is mainly composed of body, crankshaft, connecting rod, piston group, valve, shaft seal, oil pump, energy adjustment device, oil circulation system and other components.
06/21/2020
The classification of piston compressor_The advantages and disadvantages of piston compressor Classification of piston compressor
The classification of piston compressor_The advantages and disadvantages of piston compressor <img src="{{media url="The_classification_of_piston_compressor.jpg"}}" alt="" />Classification of piston compressor (1) Classification according to the position of the cylinder centerline Vertical compressor: The center line of the cylinder is perpendicular to the ground. Horizontal compressor: The center line of the cylinder is parallel to the ground, and the cylinder is only arranged on one side of the fuselage.
06/21/2020
[Experience] What happens if the compressor suction pressure is too high and the discharge pressure is too high
[Experience] What happens if the compressor suction pressure is too high and the discharge pressure is too high Compressor suction pressure is too high, discharge pressure is too high 1. Too much refrigerant. Too much refrigerant will cause the suction pressure and discharge pressure to be too high at the same time. This is because when too much refrigerant fills the reservoir, it will occupy a part of the condenser volume, reducing the heat dissipation area and causing the condenser Poor condensation. Discharge excess refrigerant from the low-pressure side.
06/21/2020
Operation process of automobile air-conditioning refrigeration system and the role of pressure switch
Operation process of automobile air-conditioning refrigeration system and the role of pressure switch From top to bottom, automobile air conditioners are mainly composed of blowers, evaporators, pressure switches, dryers, expansion valves, condensers, and the most source compressors. The operation process of this air-conditioning system is: heat dissipation,
Customers frequently viewed
IWAYA DENKI Water Pump 25CJT0752
US$2307.69
Panasonic Servo Motor MHMF022L1V2M
US$653.85
Honeywell Solenoid Valve VE4025B1045
US$334.62
ROTEN Mechanical Seal 8E5K-22-X
US$384.62
Autonics Sensor PRAT18-5DO
US$65.38
SMC Solenoid Valve SYJ3130-5MZ
US$328.85