Air compressor suction valve common fault and prevention

Compressor suction valve is a kind of do not set the ventilation pipe can maintain tube pressure stability of the attachment. In common use air compressor suction valve when we often encounter some problems, also can appear some problem, so how these failures are produced? How should prevent? Today is often valve fault is analyzed, hoping to find the cause of the problem, and corresponding preventive measures are taken in time, reduce the failure rate, to ensure safe and smooth operation of the plant.

A, first of all, from the analysis of the maintenance valve failure rate is higher, and found in the process of overhauling airway valve, valve seat and valve indoor effusion is more, frequent valve replacement. Air valve leakage fault, mainly for valve parts of mechanical damage, excessive wear, corrosion and medium, is one of the most easy to damage the valve and spring. Air valve leakage can reduce the displacement compressors, influence of compressor interstage pressure and temperature. The performance of the valve leakage have leakage and leakage.

1, leakage: suction exhaust valve cover and cylinder bolt fastening, not bolt tight caused by partial vacuum exhaust valve leakage; Additional gasket failure or damage, can also cause valve leakage. Leakage of compressor exhaust won’t have too big effect, but the propane is a flammable and explosive toxic medium, the operation staff health and the environment will cause great harm. This kind of situation, is usually caused by maintenance personnel technical level is low or carelessness, poor quality of air valve installation, commissioning and found outside the valve leakage; Appear this kind of valve leakage, can again to rework after downtime, pressure, displacement, cause certain economic loss; Leakage in valve installation process can be avoided.

2, inner leakage: valve leakage has two reasons: on the one hand, valve and cylinder sealing gasket damage, failure or not between the chamber and cylinder leaks, causing the lack of displacement; On the other hand is the valve valve action cannot effectively in place cause leakage. The cause of the air valve valve can’t reach the designated position are:

Fall into the metal debris between seat and valve disc or other sundry, closed lax, forming a flat;

The seat contact with the valve plate is lax, forming a flat;

Suction valve spring design choice not appropriate, the tension is too strong to inhale open slowly, at the end of the tension is too weak to the suction closed in a timely manner;

Air suction valve spring break, also can produce closed when compression is lax and the phenomenon of not in time;

Seat and valve disc wear and untight seal, forming a flat;

Suction opening height is insufficient, gas flow speed, resistance increase,

Spring stuck or tilt, make the valve clearance is lax.

Second, the valve leakage failure of fatigue damage caused air valve is usually made from sheet, is open and shut alternately the seat channel parts. The damage was due to the study found that air valve in the work of two main load caused by:

Caused by the valve pressure difference on both sides of uniformly distributed load, and the load, the pressure in the cylinder of the cycle of change, and produce pulsating cyclic loading cycles, the valve plate bending fatigue damage, produce ring to crack; By the valve plates and the lift limiter and the seat of the impact load produced by the hit, due to the continuous operation of the compressor, the repeated impact, cause the bending deformation of valve plates, form directly starting from the outer edge of the radial fracture damage, and the impact force is related to the quality and speed of movement of valve plates.