空压机自动排气阀失灵的原因

空压机的起停通常由气压自动开关(气压继电器)直接带动交流接触器对电动机实现自动控制。而气压自动开关大多数采用机械式结构，利用弹簧压缩与释放能量操动触点。也许是气压自动开关的先天缺乏或因调节不当、机震等不同原因的影响。

The start and stop of the air compressor is usually controlled by the air pressure automatic switch (air pressure relay) directly driving the AC contactor to realize the automatic control of the motor. Most of the pneumatic automatic switches adopt mechanical structure, and use spring to compress and release energy to operate the contacts. It may be due to the congenital lack of air pressure automatic switch or the influence of improper adjustment, mechanical shock and other different reasons.

空压机一般没有自动排气装置。停机后自动排气降压，当气压达到设定压力时。预置下次空载起动，排气阀失灵后，空压机缸内气压不能释放，等于电动机带载起动，可能造成起动困难或堵转故障。

Air compressor generally does not have automatic exhaust device. After shutdown, exhaust and depressurize automatically, when the air pressure reaches the set pressure. If the exhaust valve fails, the air pressure in the air compressor cylinder can not be released, which means that the motor starts with load, which may cause starting difficulty or locked rotor fault.

运行中突遇停送电：自动档控制的空压机，遇到突然间停送电情况(如市电，自备电电源转换)由于空压机缸内气压来不及释放又重新启动。电动机处于重载起动，很可能形成堵转故障。过于频繁起动：因外围用气量不规则，用气量大时，迫使电动机作频繁起动工作。起动时大电流产生的热余量积累不易散发，使电动机温升过热，很可能造成电动机烧毁。

Sudden power cut-off during operation: the air compressor controlled by automatic gear will be restarted in case of sudden power cut-off (such as power supply, self-contained power supply conversion) because the air pressure in the air compressor cylinder is too late to release. When the motor starts under heavy load, it is likely to cause locked rotor fault. Too frequent starting: due to the irregular peripheral gas consumption, when the gas consumption is large, the motor is forced to start frequently. When starting, the accumulation of heat allowance caused by large current is not easy to disperse, which makes the temperature rise of the motor overheat and may cause the motor to burn down.

重负荷停机：空压机的停机，与其他设备不同，都是达到设定上限压力时停机。交流接触器在接受重负荷、大电流下分段动作。此时拉弧火花为严重，对交流接触器损坏造成很大威胁，由于交流接触器损坏，将引发电源性质故障。如不平衡(缺相)等运行状态。

Heavy load shutdown: the shutdown of air compressor, different from other equipment, is to stop when the maximum pressure reaches the set upper limit. Under heavy load, the AC contactor operates in sections. At this time, the arc spark is the most serious, which poses a great threat to the damage of AC contactor. The damage of AC contactor will lead to power failure. Such as unbalanced (lack of phase), etc.

螺杆式空压机自身机械性质故障：空压机是不均匀负荷性质，机震噪声大，传动机件受阻引起磨损损坏等机械性故障，极容易引起电动机过载(堵转、阻塞等)

Screw air compressor mechanical property fault: the air compressor is uneven load property, mechanical vibration noise, transmission parts blocked caused by wear damage and other mechanical faults, it is very easy to cause motor overload (locked rotor, blocking, etc.)