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What method can avoid air compressor rust?

Air compressor do not know if you have heard of it, it is a device for air compression, there are many uses, can be used in a lot of industrial processes above。However, when you use the air compressor, is it found that it is easy to rust, if you do not pay attention to it, there will be rust, affecting the operation of the air compressor。What maintenance methods should we pay attention to when using air compressors? How can we avoid the rust of air compressors。Must have guessed what Xiaobian is going to say next。Not much to say, next let Xiaobian take you to understand the method of avoiding the rust of air compressor。


1, often clean the dust on the surface of the air compressor, sweep away the surface dust, dust, oil will extrusion the metal surface of the air compressor for a long time, so that it is corroded and rusted。
2, the use of dehumidifier to constantly extract the humid air in the room, through the dehumidifier drying cycle, turn it into dry air and then fill the space of the air compressor, so that the relative humidity in the space is maintained within the specified range for a long time。
3, the paint, grease, strippable plastic and other anti-rust materials are coated on the metal surface of the air compressor to form a thick protective layer to prevent moisture, oxygen and other contact with the metal surface to achieve rust and anti-aging protection sealing method。
4, the desiccant into several small bags, placed around the air compressor, with water resistance and gas resistance of plastic film or other sealing materials to seal the air compressor, to ensure that the air in the space is relatively dry, so as to prevent or slow down metal rust。
The above is to reduce the rust of the air compressor by various methods to reduce the air humidity in the room, mainly to prevent the metal surface from contacting with water and oxygen, resulting in oxidation。The method is not only these several, we can also use the usual dehumidification method to use this above, but to ensure that the method is scientific and effective, otherwise the rust can not be changed。The use of air compressor we also need to pay attention to daily maintenance work, to prevent rust is one aspect, only the air compressor maintenance is good, air compressor can be more effective to achieve their own role。
2023.04.26
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Contrast difference between centrifugal air compressor and screw air compressor
Bolet air compressor introduces the comparison of centrifugal and screw air compressors, which can help you better understand the advantages and disadvantages, similarities and differences between the two, and the use of occasions:
The basic principle of centrifugal air compressor:Centrifugal air compressor is a machine that generates pressure and is a kind of turbine air compressor。TURBINE is the English translation of "turbine", which is a rotating impeller。Centrifugal air compressor has been widely used in the total low pressure air separation unit, and there is a trend that centrifugal air compressor replaces piston air compressor。
1, centrifugal air compressor: refers to the movement of gas in the air compressor is carried out along the radial direction perpendicular to the shaft of the air compressor。
2. Working principle:In the process of rotating the working wheel, due to the role of rotating centrifugal force and the diffuser flow in the working wheel, the pressure of the gas is increased, and the speed is also improved。The velocity energy is then further converted into pressure energy in the diffuser。It can increase the pressure of the gas。
The difference between centrifugal air compressor and screw air compressor
3、特点:
Centrifugal air compressor is a speed type air compressor, compared with other air compressors:
优点:
⑴ Large exhaust volume, uniform exhaust gas, no pulse of air flow。
⑵ High speed。
(3) No lubrication is required in the machine。
(4) Good sealing effect, less leakage phenomenon。
(5) Flat performance curve, wide operating range。
(6) Easy to automate and scale。
With less wearing parts, less maintenance and long operation cycle。
缺点:
The adaptability of the operation is poor, and the nature of the gas has a greater impact on the operating performance。The load changes greatly when the unit starts, stops and runs。
(2) The airflow speed is large, and the parts in the flow channel have greater friction loss。
(3) There is surge phenomenon, which is very harmful to the machine。
4. Scope of application:Large and medium flow, medium and low pressure occasions。
5、分类:
(1) According to the type of shaft: single-shaft multi-stage type, several impellers are connected in series on one shaft。
Two-axis four-stage type, the four impellers are cantilevered at both ends of the two pinion, and the rotating * motor drives the pinion through the big gear。
(2) According to the type of cylinder: horizontal split and vertical split。
(3) Classification according to the form of interstage cooling:Cooling outside the stage, after each stage of compression, the gas output machine enters the cooler。
In the machine cooling, the cooler and the casing cast as one。
(4) According to the compression medium classification: air compressor, nitrogen air compressor, oxygen air compressor and so on。
Screw air compressor is a kind of positive displacement air compressor, the compression of air is achieved by the volume change of the tooth groove of the Yin and Yang rotor installed in the housing。The rotor pair rotates in the case precisely matched with it, so that the gas between the rotor tooth slots constantly produces periodic volume changes along the rotor axis, from the suction side to the discharge side, to complete the suction, compression, exhaust three working processes。
Characteristics of screw air compressor:
1) Screw air compressor and piston air compressor are the same, both belong to positive displacement air compressor。In terms of the use effect, the screw air compressor has the following advantages。
2) High reliability。The screw air compressor has few parts and no wearing parts, so it runs reliably and has a long life。
Easy operation and maintenance。Screw air compressor has a high degree of automation, and the operator does not have to go through a long time of professional training, which can achieve unattended operation。
3) Good power balance。Screw air compressor has no unbalanced inertial force, the machine can work smoothly at high speed, and can achieve no foundation operation, especially suitable for mobile air compressor, small size, light weight, and less floor space。
4) Strong adaptability。The screw air compressor has the characteristics of forced gas transmission, the volume flow is almost not affected by the exhaust pressure, and can maintain a high efficiency in a wide range. In the case of no change in the air compressor structure, it is suitable for a variety of working conditions。
The main disadvantages of screw air compressor:
1) High cost。Because the rotor tooth surface of screw air compressor is a spatial curved surface, it needs to be processed on expensive special equipment with special cutting tools。In addition, there are also high requirements for the processing accuracy of the oil and gas drum of the screw air compressor。
2) Can not be applied to high pressure situations。Due to the limitations of rotor stiffness and bearing life, screw air compressors can only be applied to medium and low pressure ranges, and the exhaust pressure is generally not more than 3Mpa。
3) Not suitable for small displacement occasions。Screw air compressors rely on gap sealing gas, and at present, only the volume flow is greater than 0.At 2M3/min, the screw air compressor has superior performance。
2023.04.25
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Why are high temperature compressors and low temperature compressors not common
The greater the refrigeration capacity of the compressor, the greater its power consumption, the smaller the refrigeration capacity, the less its power consumption。Therefore, in the case of a certain amount of compressor gas transmission, the motor equipped with the low-temperature compressor is usually small;High temperature compressors are usually equipped with large motors。
For fully enclosed or semi-enclosed compressors, the motor of the compressor is built-in, so the heat dissipation of the motor requires a certain amount of refrigerant to cool, and the larger the motor is, the greater the flow of refrigerant cooling is required.The smaller the motor, the smaller the flow rate that requires refrigerant cooling。
When the low temperature compressor is used to pull the high temperature load,Because the low temperature compressor with the motor is usually small,The cooling capacity required for high temperature load is relatively large,That is, the demand for motors is also relatively large,And use a small motor to pull a large load,There will be carts with little horses,In the long run,It will cause compressor overcurrent protection and even coil burn。
相反,When using high temperature compressor to pull low temperature storage,Because the high temperature compressor is equipped with a large motor,The cold consumption of low temperature storage is relatively small,Even the required motor should be relatively small,When a large motor is used to pull a small load, there will be a large horse-drawn trolley,Due to small load,That is, the refrigerant cooling flow rate is small,The mass flow of refrigerant is also relatively small,It is possible to cause too small refrigerant cooling flow is not enough to cool the large motor,It will cause the motor overheating protection,In the long run,It is also possible to cause the compressor coil to burn。
In addition, for the piston compressor, in addition to the motor cooling problem, there is the structure of the valve plate, although many manufacturers are now as far as possible to make the hardware model universal, but the valve plate exhaust port and suction port according to the flow rate is different。The small exhaust volume of the high-temperature machine is too large, which is easy to cause the local pressure to be too high, and the sealing gasket is damaged. If the exhaust port of the low-temperature machine is too large, the effective work of the compressor is reduced, and the height of the valve plate limit is related。As for scroll compressors, the relationship is even greater。
In summary, under normal circumstances, low-temperature compressors are not suitable for pulling high temperature load, and high temperature compressors are not suitable for pulling low load, which is why。The open-type compressor is not completely so, but it may cost electricity, or it is not economical, but if it is used, it may also be used, but the small horse and cart can not be long。
For example, a high-temperature open-type compressor is used to pull a low-temperature load,Because the motor is too large,Power consumption will increase appropriately,If the structure and material of the high and low temperature compressor are the same,Can also be used;The low temperature open compressor is used to pull the high temperature load,Because the motor is too small,Although the power consumption will be reduced,But long run,It will also cause the compressor motor overload。


2023.04.24
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Oil-free air compressor gas slow solution

The oil free air compressor is slow, which is more common in the use of air compressors。So how should we deal with this phenomenon?Next, Xiaobian gives you a brief introduction:


First, the selection of air compressor

Many users just do not know the specific gas situation of their own production, about the selection, when the exhaust pressure is not coming, lower than the rated exhaust pressure, can not meet the normal gas use of the factory, at this time, you can check whether there is a leak point in the pipeline。Close the valve behind the tank. If the unit is able to increase pressure quickly, open the valve。The pressure soon drops, and finally at a pressure point, then it can be confirmed that the compressor unit selection is too small, and the unit displacement is less than the actual gas consumption of production。
Solution: Add a new unit, so that the compressor displacement is more than 10-20% of the gas consumption of the most scientific。
Second, air compressor leakage problem
This is the most likely cause of this failure。You can start the oil-free air compressor and stop when the storage tank has a certain pressure (slightly more than the atmospheric pressure)。Then use your ears to listen to the external pipes, gas supply pipes, check valves, safety valves, pressure switches and other connections whether there is air leakage sound。If there is a sound of leakage, it is necessary to repair the leaking area。
3. Gas production standards
If the user increases the equipment that needs to use gas, the gas consumption will exceed the gas production of the oil-free air compressor, indicating that the machine is overloaded。Even if it keeps producing gas, it won't satisfy your needs。You might think it's not producing enough gas。This kind of case often exists, so please carefully check whether your gas consumption has increased recently。
Four, machine wear
Oil-free air compressor Yin and Yang rotor wear: When there is a large wear between the Yin and Yang rotor and between the stator cavity, the internal leakage of the oil-free air compressor is very large, and the oil-free air compressor will load and not pump。
Oil-free air compressor lubricating oil: screw type oil-free air compressor special oil price is slightly more expensive, some illegal suppliers to provide users with non-oil-free air compressor special oil, so that oil-free air compressor lubricating oil emulsification phenomenon, can not form an effective gas seal, resulting in oil-free air compressor efficiency is very low, and even does not produce gas。
At this time, the operator of oil-free air compressor can hear that the noise difference between the actual completely no-load and the actual loading of the vast majority of oil-free air compressors is very large, mainly the noise at the suction end is very obvious。When the internal leakage is large, there is a noise change at the suction end, and no pressure is generated, which can be sure that the oil-free air compressor is lazy and not pumping。Oil-free air compressor loading without pumping is a common oil-free air compressor failure, the general professional oil-free air compressor maintenance personnel can help you quickly solve this problem。
Five, the machine is loaded but not pumped
There are many possible reasons, such as the intake valve is not opened, oil-free air compressor false loading, pressure check valve failure, etc., the specific reasons and solutions are detailed in the article "Oil-free air compressor loading general causes and solutions"!
Six, insufficient air pressure failure reasons
The barometer fails, the oil and water separator, pipeline or air filter is clogged with too much sediment, and needs to be maintained on time。
2023.04.17
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