Piston air compressors often faults and treatment measures Industrial technology Chen Xiuhong rent 1 Qiaoju volume 1 coloring sheet maintenance 1 Jie and other advantages, has been widely used in the industry, the various analysis of the piston air compressor knot and piston One. 5 machine failure working principle handling the structure and working principle of the 1 piston air compressor Generally, the piston air compressor is driven from the motor through the corner belt to drive the bearing, thereby dragging the piston through the connecting rod to produce the recovery movement. The effect of compressed air, the piston part of the cylinder of the valve inside the motor.
Then, the compressed air is passed through the cooler to form a change in the volume of the piston, and finally enters the storage pipe. When the piston inside the cylinder moves to the right, the left chamber of the piston moves open to absorb the outside air into the cylinder. This process is called compression. When the pressure in the cylinder is greater than the pressure in the output line, the exhaust valve opens.
The air is compressed and transported into the gas pipeline, a process known as the venting process. The reciprocating motion in the piston is a motion system formed by the motor dragging the crank slider. The whole process in which the rotational motion occurring on the crank is converted into sliding is called the reciprocating motion of the piston.
2 Frequent faults and their causes and treatment measures 2.1 The reduction of the exhaust volume The actual displacement of the compressor is obviously insufficient compared to the designed displacement. It is mainly considered from the following aspects.
The severe wear of the piston cylinders results in a large associated clearance and the amount of venting affects the displacement. For normal wear and tear, it is necessary to replace the relevant accessories in time; in case of improper installation, in addition to the need to replace the relevant parts, you need to find relevant instructions, according to the regulations, the air filter is blocked. After the filter is clogged, the amount of exhaust gas is rapidly reduced, and the diameter of the suction pipe is elongated, which causes the suction resistance to become large, which seriously hinders the intake amount. In such a case, the filter must be cleaned regularly.
The reduced operating speed of the compressor reduces the amount of exhaust. The main reason for such a situation is the incorrect installation of the air compressor. The design of the compressor is designed according to the specified intake air humidity and temperature. Exceeding the standard designed by it will inevitably reduce the suction pressure and reduce the displacement.
Sealing of the stuffing box to reduce the amount of exhaust.
For this reason, it may be that the stuffing box stuffing letter itself does not meet the requirements of the regulations; it may also be that the center is not right when installed, causing damage and causing air leakage. A fixed lubricant is added to the stuffing box. Can play a very lubricating and sealing effect.
The gas pressure of the valve does not match the spring force. If the elastic force is too weak, the valve plate will not be closed in time. The elastic force is too strong, causing the valve plate to open slowly. They seriously affect the displacement and power, and the 2.2 exhaust gas temperature of the spring plate valve plate is too high. The average is the inhalation temperature in the range, etc.; the actual operation affects the inspiratory temperature. Some water-cooled machines lack water and can cause excessive exhaust temperatures. Maintenance personnel need to make corresponding maintenance for the above different situations. Fault diagnosis and troubleshooting method 1 Check the loose pressure valve assembly when the air intake is unloaded. If there is a stuck or unloaded valve, the plugging valve is blocked or stuck. 2 Check the brake system components and piping. Replace the faulty part. 3 Poor lubrication between the piston and the cylinder liner is too small or the cylinder can cause overheating. In this case, the repaired or replaced defective parts should be inspected.
2.3 Anomalous throat city When the compressor is working, some parts are faulty, such as the piston rod and the piston nut are tripped, and the piston wire is loose. The gap between the piston and the cylinder head is too small, causing collisions, etc., and some abnormal sounds will be heard. These require the staff to make a judgment and then take corresponding measures. Fault diagnosis and troubleshooting method 1 Check whether the main shaft of the connecting rod bushing bushing is worn or burned, whether the connecting rod bolt is loose, check whether the main oil passage of the air compressor is unblocked; it is recommended to replace the bearing bush with serious wear or strain. Bushing spindle.
Tightening the connecting rod bolt torque standard 35 claw 40 claws, use the compressed air oil hole to align the air inlet of the air compressor; the air clears the main oil passage. When new assembly. 1 meaning. Shaft bearing 2 check whether the main and passive pulley groove type is caused, please do not replace it, and adjust the belt tightness with the thumb to press the skin Emperor 5 lower skin 圯 以 以 以 以 检 检 检 泯 泯 泯 泯 泯 泯 泯 , , , , , , , , , , , , , , , , , , Insufficient pressure should be immediately adjusted to clean and replace the failed pipeline; check the oil quality and impurity content of the lubricant. Compare with the standard of use. Replace it immediately when it exceeds the standard; check if the air compressor is supplied with oil. If there is no oil supply, a full inspection should be carried out immediately.
2.4 Exhaust pressure is too small The compressor works under the rated pressure and the discharge is low. In such a case, it is necessary to replace a compressor having a large displacement of the same pressure. There are many factors affecting the exhaust pressure force, which is nothing more than piston wear or air valve leakage, so maintenance personnel need to find the corresponding solution to find the solution.
2.5 Overheating phenomenon Skateboard and crosshead piston rod and packing crankshaft and fl. Overheating will accelerate the wear of the friction pair. The continuous accumulation of the first heat will eventually burn the friction surface and even cause a major accident. The overheating phenomenon is mainly due to the bearing deflection, the bearing and the journal are unevenly distributed, and the viscosity of the lubricant is small. No gaps were found during installation. The maintenance personnel only need to deal with the above conditions to effectively superheat the leather surface.
2.6 Combustion and explosion accidents of compressors Carbon deposits tend to occur in general compressors. Not only does the piston trap in the tank, but also the exhaust area of ​​the valve is reduced to increase the resistance. What is more serious is that under certain conditions, carbon deposits will burn and cause an explosion. Therefore, it is necessary for the staff to filter the cylinder frequently, and the cylinder cannot supply too much lubricating oil. At the same time, the combustion explosion accident of the compressor that needs to periodically clean the storage cylinder may also be caused by an operation error. If, due to lack of experience, the gas storage valve is not opened after driving, the pressure is too large and an explosion occurs; during the test, the low-pressure nitrogen gas is used to remove the hydrogen and oxygen and cause an explosion. If you want to avoid this kind of situation, you need to pay close attention to the pressure, and the operator needs to do pre-job training.
all in all. Reciprocating piston air compressors are often used in a variety of industries, especially in the plastic packaging industry, which plays an extremely important role in this industry.
For example, when manufacturing a packaging bag, when the film is wrapped by a reciprocating piston brush, the reciprocating piston type air compressor can also be used to lift the printing effect of the offset pressure roller on the cylinder. Therefore, if the reciprocating piston type air compressor has an exhaust failure, the exhaust gas temperature is too high, the abnormal sound is emitted, the exhaust pressure is too small, and the superheat phenomenon is affected, which affects the use efficiency. In this paper, we will find out the treatment measures for the above problems in order to maximize the performance of the reciprocating piston air compressor and contribute to industrial production.
Liu Quanle, Zhao Deping. The piston of the air compressor is often ftHPlJ.2007lCM.
Sheng Qiang. Failure analysis of reciprocating piston air compressor.
Bad China Equipment Engineering, 20051.
Sun Yuping, Bai Lizhi. Qi Xin, Liu Huimin, piston oxygen compressor. Wang Chengjun. The compressor for chemical industry is live; the rod is over 1 squid and the countermeasures are taken. 1.
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