Screw air compressor several easily damaged objects

　　Six wearing parts of screw air compressor: air filter, oil filter, oil core, lubricating oil, belt, solenoid valve; Do you know all this? , now follow the editor of Hunan Ruisheng Electromechanical to understand the six most easily damaged components of Chigo screw air compressor. For more information, please visit our official website www.hnzega.com.
　　
　　One: Air filter< br/> 　　
　　The air compressor filter (Aircompressorfilter) is composed of an air filter assembly and a filter element, and the outside is connected to the intake valve of the air compressor through joints and threaded pipes, so as to filter the dust, particles and other impurities entering the air. Different air compressor models can choose to install air filters according to the size of the inlet air volume. Failure symptoms: The air filter blocked and blocked will cause the energy consumption of the air compressor to be lost, waste electricity, and easily penetrated by dust. Too much dust enters the inside of the air compressor, which will affect the life of the air compressor oil and cause the oil and gas separator to be blocked.
　　
　　Troubleshooting:
　　
　　1. The filter element is the core component of the filter, which is made of special materials and is a vulnerable part, which requires special maintenance and maintenance.
　　
　　2. When the filter has been working for a long time, the filter element has intercepted certain impurities, which will lead to an increase in pressure and a decrease in flow, which requires timely cleaning. 3. When cleaning, we must pay attention not to deform or damage the filter element.
　　
　　The filter paper in the equipment is also one of the keys, and the filter paper in high-quality filtration equipment is usually microfiber paper filled with synthetic resin, which can effectively filter impurities and have a strong dirt retention capacity. The equipment also has great requirements for the strength of the filter paper, due to the large flow of air, the strength of the filter paper can resist the strong airflow, ensure the efficiency of filtration, and extend the service life of the equipment. The porosity of the filter paper is about 10um, and the dust on the surface should usually be removed every 1000 hours, and the method of removal is to use low-pressure air to blow the dust from the inside out. The air filter is equipped with a differential pressure tester, if the display panel shows that the air filter is blocked, it means that the air filter must be cleaned or replaced.
　　
　　Two: oil filter
　　
　　Oil filter is generally a paper filter, its function is to remove impurities in the oil such as metal particles, oil deterioration, etc., the filtration accuracy is between 5um-10um, the bearing and rotor have a protective effect. Fault appearance: oil filter failure fault treatment: whether the oil filter should be replaced can be judged by its differential pressure indication, if the differential pressure indicator is on, indicating that the oil filter is blocked and must be replaced. After the first 500 hours of operation of the new machine, the oil and oil filter need to be replaced, and then replaced according to the differential pressure indicator. If the oil filter pressure difference is large and not replaced, it may lead to insufficient oil intake, and the exhaust high temperature jump machine will affect the bearing life due to insufficient oil volume. 　　The effective service life of the oil filter is determined by two factors:
　　
　　1. How many impurities. When the ability of the oil filter to adsorb impurities reaches the limit, the effective service life of the oil filter will be reached;
　　
　　2. Machine temperature and filter paper anti-carbonization ability. When the machine is at high temperature and at room temperature, the service life of the oil filter is not the same, and the high temperature model will greatly accelerate the carbonization of the filter paper and shorten the effective use time of the filter paper; In addition, the effective use time of poor filter paper will be very short, under normal circumstances, the effective filtration time of good quality oil filter is about 2000-2500 hours.
　　
　　When the frequency conversion screw machine is used at low frequency for a long time, the temperature is usually low, there is more moisture in the oil barrel, and the waterproof ability of the filter paper is high; When the frequency conversion screw machine is used at low frequency, it will lead to low pressure in the oil circuit system, and the oil filter must have low resistance and good air permeability.
　　
　　Many people may think that the oil filter is by interception filtration, the higher the accuracy, the better the filtration effect, and at the same time worry that the filtration accuracy is too high, and the oil filter is easy to block. But some studies believe that this has actually gone into a misunderstanding. There is some relationship between the filtration accuracy of the oil filter and the filtration effect, but what really determines the filtration effect is not the filtration accuracy, but the adsorption capacity of the oil filter paper. The larger the dust holding capacity, the stronger the adsorption force and the better the filtration effect. The fiber filter paper filtration effect is good because the dust holding capacity is large, the adsorption capacity is very strong, and the ability to resist carbonization is strong. However, the price of fiber filter paper is very expensive, and the filter paper factory does not sell in bulk, need to be customized in large quantities, if the oil filter does not have a particularly large sales, it is difficult to do custom fiber filter paper, which is the main reason why few people use fiber filter paper.
　　
　　Three: oil separation core
　　
　　The oil and gas separator filter element is made of multiple layers of fine glass fiber, and the mist oil and gas contained in the compressed air can be almost completely filtered out after passing through the oil fine separator. Under normal operation, the oil fine separator can be used for about 3000 hours. The oil-water separation filter element is mainly designed for oil-water separation, which contains two filter elements, namely: coalescing filter element and separation filter element. Poor separation efficiency, resulting in large oil consumption and heavy oil content of compressed air, affecting the operation of the back-end purification equipment and the failure of the gas equipment to work normally; After blocking, the piezoresistive increases, resulting in an increase in the actual exhaust pressure of the unit and an increase in the energy consumption of the unit; After failure, the glass fiber filter separation material falls off and enters the oil, resulting in shortened life of the oil filter element and abnormal wear of the main engine; After the oil core is broken, the oil runs away directly, resulting in large fuel consumption, and will also cause high temperature of the unit due to less oil, which may cause the nose to lock in severe cases.
　　
　　Failure appearance: blockage/breakage/burning/poor separation effectFault treatment: The degree of pollution of the lubricating oil and the surrounding environment has a great impact on its life, if the environmental pollution is very serious, you can consider installing a front air filter.
　　
　　1. Blockage: When the oil core is blocked, it will cause the current of the air compressor motor to be too large. It is also possible that the oil core is deformed due to excessive pressure, and the main engine will lock up when the motor overload is serious. In addition, excessive current can shorten the life of the contactor or burn the contact, causing a major accident. Generally, the screw air compressor has a pressure gauge before the filter element, and the oil separation core is replaced when the pressure difference between the pressure gauge before the filter element and the air supply pressure gauge reaches 0.08MPa.
　　
　　2. Damage: When the oil core is broken, it will be found that the oil consumption of the air compressor is very serious, and there will be a lot of oil in the gas tank and pipeline. In severe cases, the air compressor oil is directly discharged when the air tank discharge valve is discharged. The main reasons for this failure are: (1) the oil separation core was not replaced on time, (2) the poor quality oil separation core was selected, (3) the installation process was not operated according to the regulations, such as the oil separation core was broken when installing the oil return pipe.
　　
　　3. Burning: The burning of the oil separation core is not common in the operation of the air compressor, but it also occurs occasionally. It is mainly manifested as the filter screen of the oil separation core is partially or completely carbonized, and even the metal shell of the oil separation core is burned. Such failures mainly occur: (1) the quality of the air compressor oil is poor, (2) the quality of the oil separation core itself is too large, (3) When the oil separation core is installed, there is no reliable connection between the oil separation core shell and the oil separation barrel and cannot be grounded, which causes the oil mist to be ignited when there is static electricity and thus burns the oil separation core.
　　
　　4. Poor separation effect: mainly manifested as the oil content of compressed air is too large, which causes damage to after-treatment equipment and user equipment. The main reasons for this failure are: (1) The quality of the oil separation core itself is too poor; (2) The installation was not operated according to the regulations.
　　
　　Four: lubricating oil< br/> 　　
　　The function of lubricating oil is to form a protective film between the critical points of the two friction screws to avoid contact between the screws, thereby buffering the friction, playing a lubricating role and reducing wear; In addition, it also has cooling, noise reduction, sealing, rust prevention and other functions. Failure appearance: lubricating oil failure fault treatment: Indeed, whether the new air compressor needs to replace the lubricating oil for 500 hours or replace it every 4000 hours in the future, this is obtained in the standard environment, and in the actual use of the screw air compressor, many factors will affect the performance of the lubricating oil, and because of this, we need to determine the replacement cycle according to the specific use environment.
　　
　　So what factors will affect the replacement cycle of screw air compressor lubricating oil? At present, everyone agrees that the main points are:
　　
　　1. The quality of lubricating oil: the quality of lubricating oil will directly determine its use cycle. As long as it is a lubricating oil produced by a regular manufacturer with qualified quality verification, it can be replaced once in 4000 hours in a standard environment, while the replacement cycle of inferior lubricating oil is very short;
　　
　　2. Air humidity: if the humidity in the air is greater, it means that more moisture enters the air compressor, and the moisture mixed with the lubricating oil will lead to the deterioration of the lubricating oil, which will affect its service life;
　　
　　3. Impurities: including impurities entering with air and impurities generated by friction inside the air compressor. Impurities can contaminate the lubricating oil, causing it to fail;
　　
　　4. Acid and alkali gas: There will be a large number of acid and alkali gas in the use environment of some air compressors, and its types of gases will also affect the working performance of lubricating oil, resulting in a shortened service life.
　　
　　Five: belt
　　
　　The belt has good elasticity, which can alleviate shock and vibration during work, and the movement is smooth and noiseless. When the load is too large, the belt slips on the wheel, so it can prevent damage to other parts and play a safety protection role. Fault appearance: belt elasticity fault treatment: after the air compressor is turned off, the standby body temperature is cooled and there is no pressure, check the current status of the drive belt. Due to the particularity of screw air compressor construction, as for how to replace and adjust, it depends on its tightness state. If there is no serious problem such as deformation, only need to install the bolt accordingly, and then make it meet the requirements. However, when it is damaged beyond repair, it must be replaced with a new one.
　　
　　The caveat is that the tension of the belt must be consistent throughout and be prepared to prevent slipping. After installation, test run for about thirty hours to observe the changes. In fact, the most important thing here is strength, mastering this degree can avoid accidents such as disconnection. If the screw air compressor drive belt replacement and adjustment can be done well, it is also beneficial to the work of the motor and other accessories, and the load is virtually reduced. After completing all the steps, fix the machine head. Orderly progress, implementation must be rigorous, no mistakes, many times the occurrence of damage is caused by operating errors. Be vigilant and prepared to make timely adjustments to the data.
　　
　　Six: solenoid valve
　　
　　Fault appearance: non-action fault handling: the failure of the solenoid valve on the screw air compressor will directly affect the action of the switching valve and the regulating valve, the common solenoid valve does not operate, should be investigated from the following aspects:
　　
　　1. The solenoid valve connector of the screw air compressor is loose or the wire end is dropped, the solenoid valve must not be electric, and the wire end can be tightened to solve the problem.
　　
　　2. The solenoid valve coil of screw air compressor burns out. The solenoid valve coil burns out, the wiring of the solenoid valve can be removed, measured with a multimeter, if it is an open circuit, the solenoid valve coil is burned out. The reason is that the coil is damp, resulting in poor insulation and magnetic leakage, resulting in excessive current in the coil and incineration, so to avoid rainwater entering the solenoid valve. In addition, the spring is too hard, the reaction force is too large, the number of coil turns is too small, and the suction force is not good can also cause the coil to burn. For urgent disposal, the manual button on the coil can be called from the "0" position to the "1" position during normal operation, so that the valve can be turned over.
　　
　　3. The solenoid valve of the screw air compressor is stuck. The cooperation gap between the spool sleeve of the solenoid valve and the spool is very small (less than 0.008m), usually a single piece installation, when there are mechanical impurities brought in or too little lubricating oil, it is easy to jam.
　　
　　Disposal method: steel wire can be poked through the small hole in the head to make it spring. The complete solution is to remove the solenoid valve, take out the spool and the spool sleeve, and clean it with CCI4, so that the spool is sensitive in the valve sleeve. When disassembling, attention should be paid to the installation order and external wiring orientation of each component in order to reinstall and wire correctly, and also check whether the fuel injection hole of the lubricator is blocked and whether the lubricating oil is satisfied.
　　
　　4. The solenoid valve of the screw air compressor leaks. Air leakage can form a lack of air pressure, making it difficult to open and close the valve, due to damage to the sealing gasket or wear of the spool valve, resulting in several cavities of air channeling. When checking the solenoid valve fault, it should be disposed of when the solenoid valve is out of power, and the solenoid valve should be replaced directly to burn the coil, or the leakage of the valve body should be repaired.