Common Pneumatic Cylinder Failures And Solutions
1. The cylinder is faulty
due to flawed cylinder assembly and lengthy-time period use, pneumatic actuator +(cylinder) is prone to inner and outdoor leakage, inadequate output stress and choppy movement, poor buffering impact, piston rod + and cylinder head * harm and different failure phenomena.
(1) The internal and outdoor leakage of the cylinder is commonly due to eccentric piston rod installation, insufficient deliver of lubricating oil, put on or damage of the sealing ring and the sealing ring, impurities within the cylinder and the piston rod are scarred.
consequently, even as the cylinder appears internal and external leakage, the center of the piston rod have to be re-adjusted to make certain the coaxial diploma of the piston rod and the cylinder; it's far crucial to check frequently whether or now not the oil mist + works reliably to make sure that the actuator is well lubricated; whilst the sealing ring and sealing ring placed on or damage ring, it should be replaced in time; If there are impurities inside the cylinder, it need to be removed in time; Piston rod need to get replaced even as there is a scar.
(2) The inadequate output stress and unstable movement of the cylinder are typically resulting from the piston or piston rod being caught, horrific lubrication, inadequate fuel deliver or condensate and impurities inside the cylinder. on this regard, the middle of the piston rod have to be adjusted: test whether or not the artwork of the oil mist is reliable; whether or not or not the gasoline deliver line is blocked. whilst there may be condensate and impurities within the cylinder reminiscence, it ought to be removed in time.
(3) The buffer effect of the cylinder is horrible, usually due to the damage of the buffer seal ring or the damage of the adjustment screw. proper now, the sealing ring and adjusting screws have to get replaced.
(4) The piston rod and cylinder head of the cylinder are broken, generally due to the piston rod installation eccentric or the buffer mechanism does not paintings. in this regard, the critical function of the piston rod must be adjusted; update the buffer seal or adjusting screw.
2. The reversing valve is defective
The fault of the reversing valve is: the valve can't reverse or the reversing movement is gradual, the gas leakage, the electrical pilot valve is faulty
(1) The reversing valve can not be reversed or the reversing motion is sluggish, usually because of bad lubrication, the spring is stuck or damaged, oil or impurities caught inside the sliding aspect and unique reasons brought about. on this regard, the oil mist must first test whether the art work is regular; whether or not the viscosity of the lubricating oil is suitable. If important, the lubricating oil ought to be replaced, the sliding part of the reversing valve have to be wiped easy, or the spring and valve must be replaced.
(2) After a long time of use, the reversing valve is vulnerable to placed on the spool seal ring, valve stem and seat damage. motives gas leakage within the valve, gradual operation of the valve or can't be reversed normally. right now, the sealing ring, stem and seat need to be replaced, or the reversing valve ought to get replaced
(3) If the inlet and outlet of the solenoid pilot valve are blocked with the aid of particles consisting of dust, the closure isn't always strict, the lively iron center is stuck, the circuit is defective, and plenty of others., which can result in the normal reversal of the reversing valve.
For the first three times, the sludge and impurities on the pilot valve and the movable middle should be cleaned. The circuit fault is generally divided into manage circuit fault and electromagnetic coil fault lessons. earlier than checking the circuit fault, the manual knob of the reversing valve should be grew to grow to be numerous instances to see whether or not the reversing can be reversed typically under the rated air strain. If it can be changed generally, the circuit is defective. whilst checking, the device can measure the voltage of the electromagnetic line to appearance whether the rated voltage is reached, if the voltage is just too low, need to in addition take a look at the energy supply in the control circuit and the associated stroke transfer circuit if the reversing valve can't be reversed normally underneath the rated voltage, you should check whether or not the connector (plug) of the electromagnetic coil is unfastened or the contact isn't always real. The technique is to unplug and degree the resistance fee of the coil, if the resistance price is just too big or too small, indicating that the electromagnetic twine has been broken and need to get replaced.
3. The pneumatic auxiliary element is faulty
the primary faults of pneumatic auxiliary additives are: oil mist failure, automated blowdown tool + failure, muffler + failure and so forth.
(1) The faults of the oil mist are: the adjustment quantity of the regulating needle is simply too small, the oil circuit is blocked, the pipeline leaks, and so forth., will make the liquid oil droplets can not be atomized. on this regard, the blockage and air leakage need to be handled in time, and the quantity of dripping ought to be adjusted to reach approximately five drops /min. In everyday use, the oil level in the oil cup must be kept within the higher and decrease limits. The water deposited at the lowest of the oil cup should be removed in time.
(2) The oil and water in the computerized drainer once in a while can't be mechanically excluded, specifically inside the case of low winter temperatures. At this element, it have to be removed and inspected and cleaned.
(3) at the same time as the muffler at the reversing valve is honestly too dirty or blocked, it'll moreover have an impact at the sensitivity and reversing time of the reversing valve, so it have to be wiped clean often
