Common faults and answers of Pneumatic cylinders
A cylinder refers to a cylindrical metallic element that houses a piston to perform linear reciprocating motion within it. Its principal application fields encompass printing (anxiety control), semiconductors (spot welding machines, chip grinding), automation management, robots, etc.
A cylinder consists of a cylinder barrel, a case cover, a piston, a piston rod, and sealing elements etc. Now, let us introduce the common faults of cylinders and their answers.
one because to incorrect meeting of the cylinder and long-time period use, the pneumatic actuator (cylinder) is vulnerable to inner and outside leakage, inadequate output pressure, unstable operation, poor buffering effect, harm to the piston rod and cylinder head, and other fault phenomena.
(1) inner and external leakage inside the cylinder is commonly as a result of eccentric set up of the piston rod, inadequate supply of lubricating oil, put on or damage of the sealing ring and sealing ring, impurities inside the cylinder and scratches on the piston rod, etc. therefore, while there's inner or external leakage inside the cylinder, the center of the piston rod need to be readjutted to ensure the coaxiality between the piston rod and the cylinder barrel. It's miles important to often take a look at whether the oil mist lubricator is working reliably to ensure that the actuating factors are nicely lubricated. When the sealing ring and the sealing ring are worn or broken, it should be replaced in time. If there are impurities in the cylinder, they have to be eliminated in time. While there are scratches on the piston rod, it needs to be replaced.
(2) Inadequate output force and risky operation of the cylinder are usually a result of reasons which include the piston or piston rod being caught, poor lubrication, insufficient air supply, or condensation water and impurities inside the cylinder. In this regard, the center of the piston rod has to be adjusted. test whether or not the oil mist lubricator is running reliably, and whether the gas delivery pipeline is blocked. When there's condensate water and impurities inside the cylinder, they ought to be removed in time.
(3) negative buffering impact of the cylinder is usually because of the damage of the buffer sealing ring or the harm of the adjusting screw. At this point, the sealing ring and adjusting screws have to get replaced.
(4) Damage to the piston rod and cylinder head of the cylinder is normally due to the eccentric setup of the piston rod or failure of the buffer mechanism. In this regard, the middle function of the piston rod ought to be adjusted. update the buffer sealing ring or the adjusting screw.
The faults of the directional manipulate valve encompass: the valve can not reverse or the reversing movement is slow, gasoline leakage, and the solenoid pilot valve is defective, etc.
(1) If a directional control valve fails to alternate direction or moves slowly, additionally it is because of bad lubrication, the spring being stuck or damaged, oil stains or impurities getting stuck in the sliding components, etc. in this regard, it's miles necessary to first check whether the oil mist lubricator is running nicely. Whether or not the viscosity of the lubricating oil is suitable. While essential, the lubricating oil ought to be replaced, the sliding components of the directional manage valve have to be cleaned, or the spring and the directional manage valve have to be replaced.
(2) After long-term use, the directional control valve is prone to wear out one of the valve's middle sealing rings, causing harm to the valve stem and valve seat, which leads to gas leakage in the valve, gradual valve operation, or a lack of ability to reverse generally and other faults. At this point, the sealing ring, valve stem, and valve seat must be replaced, or the directional control valve must be replaced with a brand new one.
(3) If the consumption and exhaust holes of the solenoid pilot valve are blocked by means of oil sludge or different particles, the sealing isn't tight, the movable core is stuck, or there may be a fault within the circuit, etc., a lot of these can purpose the directional manipulate valve to fail to reverse normally. For the primary three conditions, the oil sludge and impurities at the pilot valve and the movable iron center must be wiped clean. Circuit faults are typically divided into categories: manipulate circuit faults and electromagnetic coil faults. before checking for circuit faults, the manual knob of the directional manipulate valve have to be grew to become some instances to peer if it can opposite commonly under the rated air stress. If it may reverse commonly, there is a fault inside the circuit. When conducting the inspection, the voltage of the electromagnetic coil can be measured with an instrument to see if it has reached the rated voltage. If the voltage is just too low, the energy delivered inside the manage circuit and the associated limit transfer circuit have to be additionally inspected. If the directional control valve fails to reverse usually at the rated voltage, it is important to check whether or not the connection (plug) of the electromagnetic coil is loose or has poor contact. The approach is to unplug the plug and degree the resistance value of the coil. If the resistance fee is just too large or too small, it shows that the electromagnetic coil is damaged and should be replaced.
3 The faults of pneumatic auxiliary components particularly encompass: oil mist lubricator faults, automatic drain valve faults, muffler faults, and so on.
(1) The faults of the oil mist lubricator include: the adjustment amount of the adjustment needle is too small, the oil passage is blocked, and the pipeline leaks, all of that could save you the liquid oil droplets from atomizing. in this regard, the clogged and leaking regions ought to be treated promptly, and the oil dripping rate have to be adjusted to about five drops in keeping with minute. whilst in regular use, the oil stage within the oil cup have to be maintained within the higher and decrease limit tiers. The water deposited at the lowest of the oil cup need to be removed in time.
(2) sometimes the oil stains and moisture within the automatic drain valve can't be discharged automatically, particularly in wintry weather when the temperature is surprisingly low, the situation is particularly serious. At this point, it need to be eliminated and inspected and wiped clean.
(3) when the muffler set up on the directional manage valve is too grimy or clogged, it will also affect the sensitivity and reversing time of the directional control valve. therefore, the muffler must be wiped clean frequently.
