What is laboratory air compressor?
Laboratory air compressor
is a piece of experimental equipment with the characteristics of continuous and stable work, simple operation, safe use, environmental protection, and energy saving.
To provide a good working environment for laboratory staff, noise control is particularly demanding. The lab air compressor
is an instrument dedicated to providing air sources for experimental equipment. There is a big difference compared to general industrial air compressors.
Working principle of laboratory air compressor
A. Basic working principle of air compressor
There are no intake and exhaust valves set in the intake process. The air intake can only be regulated by opening and closing the automatic adjustment valve. The space is larger when the tooth slot space of the main and auxiliary rotor is turned towards the housing inlet. At this time, the slot space under the rotor is connected to the free space of the air inlet. When air is discharged, the tooth groove is under vacuum and outside air is drawn in and flows axially into the tooth grooves of the main rotor and auxiliary rotor. When the air fills the entire tooth groove, the air inlet side end of the rotor is turned away from the air inlet of the housing.
B. Sealed conveying process based on the air compressor principle
At the end of suction, the teeth of the main rotor and sub-rotor will be sealed with the housing, and the air in the tooth grooves will no longer flow out, which is the closing process. As the two rotors continue to rotate, their tooth peaks and tooth slots reunite at the suction end and the mating surface gradually moves toward the discharge end, thus forming a gas transfer process.
C. Compression process and oil injection process based on the principle of air compressor
In the process of transportation, the anastomosis surface gradually moves toward the exhaust port. In the process of moving, the space between the anastomosis surface and the exhaust port is gradually reduced, while the air in the tooth groove is gradually compressed and the pressure gradually becomes larger, which is the compression process. During compression, the lubricant is sprayed into the compression chamber to mix with the air due to the pressure difference in the action.
D. Exhaust process based on the principle of air compressor
When the rotor exhaust port end face is connected to the housing exhaust port, the compressed gas starts to be discharged. The discharge process continues until the mating surface between the top of the tooth and the tooth groove moves to the exhaust end of the housing. The venting process is completed when the space between the two rotor mating surfaces and the housing exhaust port is zero. At the same time, the length of the gap between the rotor mating surface and the housing inlet is stretched again to start a new compression cycle.
Laboratory compressed air requirements
A quiet laboratory environment can alleviate a lot of trouble for the laboratory operators. Therefore, the noise control of the machines in the laboratory is very demanding. Typically, the air compressor that generally provides an air source for the laboratory has a special configuration.
Air compressor for laboratory use
A. Stability of workability
a. In general, most of the laboratory air compressor air pressure in 0 ~ 8bar adjustable, in line with the general requirements of the air pressure of experimental equipment.
b. Stable gas requirement. Because of the need to ensure a stable and continuous supply of gas flow, there are high requirements for the stability of air compressor work.
B. High-quality compressed air
C. Safe working and easy to operate
D. Ultra quiet lab air compressor
Generally, the noise control of air compressors for experimental use is about 60 decibels. To ensure that the experimental personnel has a relatively quiet working environment, it is recommended to choose ultra-quiet lab air compressors.
Types of laboratory air compressor
|Classification based on||Types
|Air compression||a. Air compressor
b. Oxygen compressor
c. Ammonia compressor
d. Natural gas compressor
|Installation method||a. Piston compressor
b. Rotary screw compressor
c. Centrifugal compressor
|Compressor gas mode|
|a. Volumetric compressor
b. Power compressor
|Structure and working principle||A. Volumetric compressor
a. Reciprocating (piston, membrane) compressor
b. Rotary (slide, screw, rotor) compressor
B. Power compressor
a. Axial flow compressor
b. Centrifugal compressor
c. Mixed flow compressor
|Compression times||a. Single-stage compressor
b. Two-stage compressor
c. Multi-stage compressor
|Arrangement of cylinders||a. Vertical compressor
b. Horizontal compressor
c. L-type compressor
d. V-type compressor
e. W-type compressor
f. Fan-shaped compressor
g. M-type compressor
h. H-type compressor.
|Final pressure of the compressor discharge||a. Low-pressure compressor
(exhaust pressure in the range of 0.3 MPa to 1.0 MPa)
b. Medium pressure compressor
(exhaust pressure in the 1.0 MPa to 10.0 MPa)
c. High-pressure compressor
(exhaust pressure in the 10.0 MPa to 100.0 MPa)
Use of laboratory air compressor
Failures and basic maintenance solutions of laboratory air compressor
A. The air compressor does not start
You should check if there is a control voltage. If not, check if the fuse is intact. If there is a control voltage, check if the control relay and time relay are operating properly.
B. Poor start of air compressor
Automatic shutdown after a few seconds of start-up. Check whether the automatic air switch is tripped, whether the voltage is normal, whether the degree of closing of the inlet butterfly valve is normal (the compressor is not allowed to start with load), and whether the contractor and motor three phases are normal, etc.
C. Air compressor does not supply air
You should check the control cylinder for any abnormality. If there is an abnormality, check the butterfly valve for mechanical failure; if there is no failure, check the loading solenoid ISV coil to see if there is suction. After excluding the ISV solenoid valve mechanical failure and coil failure, line up the sub-circuit where the solenoid valve ISV is located one by one.
D. Low exhaust pressure of air compressor
You should check the pressure before and after separation, and whether the manual valve and regulating solenoid valve 2SV are leaking. Exclude the above factors and then check whether there is leakage in the gas pipeline, whether the butterfly valve is all open, whether the air inlet regulator is working properly, whether the solenoid valve 3SV and 8SV are leaking, whether the pressure switch IPS needs to be readjusted, etc.
E. Air compressor inlet oil spray and shutdown
You should check whether the oil cut-off solenoid valve 5SV has voltage, or whether the mechanical part is normal. If normal, check the non-return valve for reassembly or replacement.
F. High exhaust temperature of air compressor
The exhaust gas temperature is usually between 80°C and 95°C. If not provide enough lubricant to cool, it will make the temperature too high and cause failure. You should check whether the ambient temperature, compressor lubricant, oil level, oil quality, and refrigeration fan are normal. Then check whether the oil cooler and aftercooler are clean and whether the temperature control valve element, oil break solenoid valve voltage, and valve body part are normal. If the diaphragm is damaged or the temperature control valve spool does not operate, it needs to be replaced. Finally, check whether the oil filter is dirty or needs to be replaced.
G. High oil consumption of air compressor
You should check whether the condensate discharged from the trap contains too much oil, whether the compressor oil level is high, whether the minimum pressure valve opening pressure is normal, whether the return line is blocked, whether the oil separation core is blocked, etc. All the above problems will affect oil consumption and should be dealt with in time.
H. Automatic shutdown of air compressor during operation
You should first check whether the machine stops automatically normally; then check whether the automatic switch and thermal relay operate to cause the cooling fan motor to stop, or the exhaust temperature is too high, or the pressure is too high, and whether the motor voltage is normal, etc.
Air compressor and compressor
People always think that an air compressor
is exactly a compressor. This perception is biased because the scope of the compressor is much larger than that of the air compressor.Laboratory air compressors
are primarily used to lab compress air
. One of the most common functions of an air compressor is to compress air for power. In addition, they can also be used for refrigeration and separation of gases, transport of gases, etc.
Compressor is a general term for a large category. There are many types of compressors, such as refrigerant compressors, hydrogen compressors, air compressors, etc. Air compressors
are one of the compressors. The compression medium of an air compressor is air, while a compressor can compress many things, not just air.
Therefore, air compressors
are included in the general concept of compressors and do not refer to compressors.
How to buy laboratory air compressor?
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