Common troubleshooting methods for pneumatic components? 【b

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作者:admin     来源:未知       发布时间: 2017-12-26 18:52
导读:Common troubleshooting methods for pneumatic components? 【 bansbach 】 In the maintenance and repair of all kinds of pipe fittings, release control handle often use various types of pneumatic components of the variable hydraulic pump, the

Common troubleshooting methods for pneumatic components? 【bansbach
In the maintenance and repair of all kinds of pipe fittings, release control handle often use various types of pneumatic components of the variable hydraulic pump, the swash plate will automatically return in a flow becomes zero as time frequency and time of growth, these components will appear all kinds of faults of the hydraulic pump shaft bearing for tapered roller bearings. Can withstand external large axial force as a professional manufacturer of pneumatic components, we also have rich experience to solve the fault components, the following share with you:
First, reversing valve failure
Reversing valve failure: the valve can not reverse or reversing movements slow, gas leakage, electromagnetic pilot valve failure, etc..
(1) reversing valve can not reverse or reverse movement is slow, generally due to poor lubrication, spring stuck or damaged, oil or impurities stuck, sliding parts and other reasons. In this regard, we should first check whether the work of the oil mist is normal; the viscosity of the lubricant is appropriate. When necessary, replace the lubricating oil, wash the sliding parts of the reversing valve, or replace the spring and reversing valve.
(2) reversing valve after a long period of use, prone to spool (attached to the body), sealing ring wear, valve stem and valve seat damage, resulting in leakage of gas inside the valve, the valve moves slowly or can not be normal commutation and other faults. At this point, you should replace the sealing ring, stem and valve seat, or change the valve.
(3) if the electromagnetic pilot valve inlet and exhaust holes are blocked by dirt and other debris, the sealing is not strict, the movable iron core is jammed, and the circuit is out of order, etc., which can cause the reversing valve to not change normally. For the first 3 cases, the dirt and impurities on the pilot valve and the movable iron core shall be cleaned. The circuit fault is generally divided into control circuit fault and electromagnetic coil fault two categories, for the two types of faults should also be examined separately.
Two 、 pneumatic actuator fault
Due to improper assembly and long-term use of the cylinder, the pneumatic actuator is prone to leakage, internal and external leakage, lack of output force and movement, poor buffering effect, damage to the piston rod and cylinder head, etc..
(1) the inner, leakage and leakage of the cylinder are caused by the eccentric installation of the piston rod, insufficient lubrication oil, wear and damage of the sealing ring and sealing ring, impurities in the cylinder and the damage of the piston rod. So, when the cylinder internal and external leakage, should re adjust the center of the piston rod, the piston rod and the cylinder to ensure the coaxiality; need to check the oil mist, the reliability of the work, to ensure the implementation of components of good lubrication; when the sealing ring and the sealing ring wear or damage, should be replaced in a timely manner; if there are impurities in the cylinder, should be promptly removed; a scar on the piston rod, should be renewed.
(2) insufficient output of air cylinder and the action is not stable, is generally due to the piston or piston rod is stuck, poor lubrication, insufficient air supply, or cylinder of hydraulic pump mechanical condensate and impurities and other causes of manipulation, hydraulic servo displacement control can maintain the swash plate angle and the corresponding displacement of this that should be adjusted to the center of the piston rod; check the oil mist, the reliability of the work of the gas supply pipe is blocked. When the cylinder has condensed water and impurities, it should be removed in time.
(3) the cushion effect of the cylinder is bad. It is usually caused by the wear of the buffer ring or the damage of the adjusting screw. The sealing ring and adjusting screw should be replaced at this time.
(4) the piston rod of the cylinder and the cylinder head is damaged, the general agricultural machinery hydraulic pump caused by eccentric rod installation or buffer mechanism does not play the role of manipulation, hydraulic servo displacement control can maintain the swash plate angle and the corresponding displacement in this regard, should adjust the position of the center of the piston rod; replacement or adjustment screw ring buffer.
Three. Malfunction of pneumatic auxiliary component
The main troubles of pneumatic auxiliary components are oil mist failure, automatic blowdown fault and so on.
(1) the trouble of the oil sprayer is that the adjustment of the needle is too small, the oil circuit is blocked, the pipeline leaks, etc., and the liquid oil droplets can not be atomized. When there is no pilot signal input, it is in the normally closed state. When the compressed air of the pilot air path enters the B chamber, the hydraulic pressure is reduced to work. In this regard, should promptly deal with the blockage and leakage of gas, adjust the amount of oil drop, so that it reaches 5 drops of /min or so. In normal use, the oil within the oil to keep the upper and lower limit range. On the bottom of the deposited water should be excluded.
(2) the oil and water in the automatic sewage can not be removed automatically, especially in the case of low temperature in winter. At this point, it should be removed and inspected and cleaned.
(3) when the valve is too dirty or blocked, it will also affect the sensitivity and timing of the reversing valve, so it must be cleaned frequently.
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