空压机技术文章

造成螺杆空压机高温的原因有哪些

2018-12-20 10:15:24      点击:
一、环境温度过高对螺杆空压机造成高温这个主要从二个方面来影响空压机。A:温度越高,空气越是稀薄(就好象空压机在高原地区效率低一样),造成空压机工作效率下降,使空压机更多时间处于加载状态,带更多负载,造成空压机产生的热量更多,空压机肯定温度就更高。B:一般空压机设计的时候就有一个设计运行环境温度(30-40度),在设计运行环境温度下运行空压机一般zui高温度就快接近空压机保护温度,如果空压机环境温度高于设计运行环境温度,就会提高空压机的温度从而使空压机到底甚至超过空压机的停机温度,从而造成空压机高温。

1. High ambient temperature causes high temperature to screw air compressor, which mainly affects air compressor from two aspects. A: The higher the temperature is, the thinner the air is (as if the air compressor is inefficient in Plateau area), which results in the decrease of the working efficiency of the air compressor, makes the air compressor in loading state for more time, carries more load, causes the heat generated by the air compressor to be more, and the sure temperature of the air compressor will be higher. B: When the air compressor is designed, there is a design operating environment temperature (30-40 degrees). Under the design operating environment temperature, the Zui high temperature of the air compressor is close to the protection temperature of the air compressor. If the ambient temperature of the air compressor is higher than the design operating environment temperature, the temperature of the air compressor will be increased, so that the air compressor will end up even exceeding the shutdown temperature of the air compressor. Air compressor high temperature.



二、空压机系统缺油。可检查油气桶油位,在停机泄压后,润滑油处于静态时,油位应比高油位标志H(或MAX)略高。在设备运行过程中,油位不能低于低油位标志L(或MIX)。如发现油量不足或观察不到油位时,应立即停车加油

2. Oil shortage in air compressor system. The oil level of oil and gas barrel can be checked. When the lubricant is static after shutdown and pressure relief, the oil level should be slightly higher than the high oil level mark H (or MAX). During the operation of the equipment, the oil level should not be lower than the low oil level mark L (or MIX). Stop and refuel immediately if insufficient oil is found or no oil level is observed.



三、油停止阀(断油阀)工作不正常。油停止阀一般为两位两通常闭电磁阀,起动时开启,停机时关闭,(atlascopco机器为机械式开启阀)以避免停机时油气桶内的油继续喷入机头,并从进气口喷出。若该元件加载时不开启,主机会因缺油迅速升温,严重者会造成螺杆总成烧毁。

3. Oil stop valve (oil shut-off valve) works abnormally. Oil stop valves are usually two or two normally closed solenoid valves, which are opened at start and closed at shutdown (atlascopco machine is mechanical open valve) to avoid oil in the oil and gas barrel continuing to inject into the nose and eject from the intake port during shutdown. If the component is not opened when loading, the main engine will be heated rapidly due to oil shortage, and the screw assembly will be burnt down in serious cases.



四、机油过滤器问题A:机油过滤器堵塞旁通阀又不开启会造成空压机油不能到达机头,主机会因缺油迅速升温。B:机油过滤器堵塞流量变小,有一种情况就是空压机因为热量带走的不是很完全空压机温度慢慢升高形成高温,另外一种情况是空压机卸载后空压机高温,因为空压机在加载是内部油压高,空压机油可以通过,而空压机卸载后空压机油压力低空压机油通过空压机机油过滤器困难,流量太小从而造成空压机高温。

4. Oil filter problem A: If the oil filter blockages the bypass valve and does not open, the air compressor oil will not reach the engine head, and the main engine will be heated rapidly due to oil shortage. B: The blocking flow of oil filters becomes smaller. One case is that the air compressor temperature rises slowly because the heat takes away from the air compressor. The other case is that the air compressor temperature rises slowly after unloading, because the internal oil pressure of the air compressor is high, and the air compressor oil can pass through, while the air compressor oil pressure of the low air compressor oil passes through the air compressor after unloading. The oil filter is difficult and the flow rate is too small to cause the high temperature of the air compressor.



五、热控阀(温控阀)工作失灵。热控阀安装于油冷却器前方,其作用是维持机头排气温度于压力露点以上。其工作原理是刚开机时由于油温较低,热控阀支路开启,主回路关闭,润滑油不经冷却器直接喷入机头;待温度升至40℃以上,热控阀逐渐关闭,油同时从冷却器和支路流过;升高到80℃以上,该阀完全关闭,润滑油则全部经冷却器再进入机头,以zui大程度对润滑油进行冷却。如果热控阀出现故障,则润滑油可能不经冷却器直接进入机头,从而油温无法下降,造成超温。其失灵的主要原因,一是阀芯上的大小两个热敏弹簧疲劳后弹性系数改变,不能随温度变化而正常动作;二是阀体磨损,阀芯卡死或动作不到位而无法正常关闭。可根据情况修复或更换。

Fifth, thermal control valve (temperature control valve) work failure. The thermal control valve is installed in front of the oil cooler. Its function is to maintain the exhaust temperature of the engine head above the pressure dew point. Its working principle is that when starting the engine, because of the low oil temperature, the branch of the thermal control valve is opened, the main circuit is closed, and the lubricant is directly injected into the engine head without the cooler; when the temperature rises above 40 C, the thermal control valve closes gradually, and the oil flows through the cooler and branch at the same time; when the temperature rises above 80 C, the valve is completely closed, and the lubricating oil enters the engine head again through the cooler to a large extent of zui. Cooling. If the thermal control valve fails, the lubricant may enter the engine head directly without the cooler, thus the oil temperature can not be lowered, resulting in overheating. The main causes of failure are: first, the elastic coefficient of the two thermosensitive springs on the valve core changes after fatigue, and they can not operate normally with the temperature change; second, the valve body is worn, the valve core is stuck or the action is not in place and can not close normally. It can be repaired or replaced according to the situation.



六:检查油量调节器是否正常(对于复盛等机组有油量调节阀),必要时可适当加大喷油量。喷油量在设备出厂时已调好,一般情况下不宜改变。

Sixth: Check whether the fuel quantity regulator is normal (for Fusheng and other units, there are fuel quantity regulator valves), if necessary, properly increase the amount of fuel injection. The fuel injection quantity has been adjusted when the equipment is out of the factory, and should not be changed in general.



七、机油超过使用时间机油变质。流动性变差,热交换热性能下降。造成空压机机头的热量不能完全带走造成空压机高温。

7. Oil deteriorates over time. The fluidity becomes worse and the heat exchange performance decreases. The heat of the air compressor head can not be completely taken away, resulting in high temperature of the air compressor.



八、检查油冷却器工作是否正常。对水冷式机型,可检查其进出口水管的温差,正常情况下应为5一8℃,低于5℃可能有结垢或堵塞现象,将会影响冷却器的换热效率,并造成散热不良,此时可将换热器拆下后进行清洗。

8. Check whether the oil cooler works properly. For water-cooled machines, the temperature difference between the inlet and outlet water pipes can be checked. Normally, the temperature difference between the inlet and outlet water pipes should be 518 (?) C. Scaling or blockage may occur below 5 (?) C, which will affect the heat transfer efficiency of the cooler and cause bad heat dissipation. At this time, the heat exchanger can be removed and cleaned.



九、检查冷却水人口温度是否过高,水压及流量是否正常,对于风冷式机型则检查环境温度是否过高。冷却水的入口温度一般不应超过35℃,水压在0.3一0.5MPA之间流量应不小于规定流量的90%。环境温度不应高于40℃。如果达不到上述要求,可通过安装冷却塔、改善室内通风、加大机房空间等办法解决。还可检查冷却风扇工作是否正常。如有故障应进行检修或更换。

9. Check whether the population temperature of cooling water is too high, whether the water pressure and flow rate are normal, and whether the ambient temperature is too high for air-cooled machines. Generally, the inlet temperature of cooling water should not exceed 35 C, and the flow rate between 0.3 MPA and 0.5 MPA should be no less than 90% of the prescribed flow rate. The ambient temperature should not be higher than 40 C. If the above requirements are not met, they can be solved by installing cooling towers, improving indoor ventilation, and increasing room space. It can also check whether the cooling fan works properly. If there is a fault, it should be repaired or replaced.



十、风冷机组主要检查进出油温相差是否在10度左右,如果小于这个值则应检查散热器表面翅片是否脏堵,如果脏堵可用洁净空气将散热器表面粉尘,并检查散热器翅片是否腐蚀,腐蚀厉害的话则有必要考虑更换散热器总成,内部管道是否有脏堵现象,若有此现象则可用循环泵循环带一定酸性药水清洗,一定要注意药水浓度,以及循环时间,避免散热器因药水腐蚀造成散热器穿腔。

10. Air-cooled units mainly check whether the difference of oil temperature between inlet and outlet is about 10 degrees. If the difference is less than this value, they should check whether the fins on the radiator surface are dirty blocked. If dirty blocked can be used clean air to dust the radiator surface, and check whether the fins of the radiator are corroded. If the corrosion is serious, it is necessary to consider replacing the radiator assembly and whether the internal pipeline is dirty blocked. The circulating pump can be cleaned with certain acidic medicinal water. The concentration of medicinal water and the circulating time must be paid attention to so as to avoid the radiator perforating due to the corrosion of medicinal water.
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