KINGBULL 750cfm diesel air compressor for sale

KINGBULL 750cfm diesel air compressor for sale

In general, the occurrence of 750cfm diesel air compressor over-temperature faults is mostly related to the abnormality of the diesel screw air compressor lubrication and cooling system. So we firs...

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In general, the occurrence of 750cfm diesel air compressor over-temperature faults is mostly related to the abnormality of the diesel screw air compressor lubrication and cooling system. So we first analyze from the lubrication system.

750cfm diesel air compressor lubrication system and oil circuit components

Lubricating oil for oil-injected screw compressors has various functions such as lubrication, cooling, flushing, sealing, vibration reduction, unloading, and protection. One of the most important is cooling. Most of the heat generated when the air is compressed in the head is taken away by the lubricant. A small amount of heat is emitted through conducted radiation. If the amount of lubricating oil is insufficient or the oil circuit components work abnormally, the oil temperature will rise, which will cause diesel screw air compressor over-temperature faults.

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Deterioration of lubricant over time

Lubricant must be changed on time. If it is out of service for a long time, it will cause poor fluidity and reduce heat exchange performance. The heat of the machine head cannot be completely removed, resulting in high temperature of the 750cfm diesel air compressor.

750cfm diesel air compressor lubrication system is short of oil

Check the oil level of the oil and air barrel. After the pressure is stopped and the oil is at a standstill, 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 cannot be lower than the low oil level mark L (or MIX). If it is found that the amount of oil is insufficient or the oil level is not observed, the equipment should be shut down immediately to refuel.

Insufficient oil supply

First check whether the oil filter and fine oil separator are blocked. The oil fine separator is made of multi-layer glass fiber. Which is used to filter the oil mist in the compressed air to prevent the loss of lubricating oil. If the environment is poor and there is a lot of dust, the replacement cycle should be shortened appropriately. The 750cfm diesel air compressor oil filter and fine oil separator are designed with differential pressure switches.

It can be automatically determined whether the filter is clogged by detecting the true pressure difference between the two filters. If the filter is blocked, the filter and separator should be replaced in time. Secondly, check whether the oil quantity regulator is normal, and if necessary, increase the fuel injection quantity appropriately. The fuel injection quantity has been adjusted when the equipment leaves the 750cfm diesel air compressor factory. Generally, it is better not to change it.

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750cfm diesel air compressor oil shutoff valve is faulty

The oil shut-off valve is usually a two-position, two-position normally closed solenoid valve, which is opened at startup and closed at shutdown. To prevent the oil in the oil and air barrels from continuing to spray into the machine head and spraying out from the air inlet during shutdown. If the 750cfm diesel air compressor oil shut-off valve fails, the host will heat up quickly due to lack of diesel screw air compressor oil. In severe cases, the screw assembly will burn out.

The temperature control valve fails

The temperature control valve is installed in front of the oil cooler. And its function is to maintain the head exhaust temperature above the pressure dew point. Its working principle is that the oil temperature is low. The temperature control valve branch is opened, the main circuit is closed, and the lubricating oil is directly injected into the machine head without passing through the cooler.

When the temperature rises above 40 °C, the temperature control valve is gradually closed. Oil flows through both the cooler and the branch. When the temperature rises above 80 ° C, the valve is completely closed, and all the lubricating oil enters the 750cfm diesel air compressor machine head through the cooler to cool the diesel driven air compressor lubricating oil to the greatest extent.

If the temperature control valve fails, the lubricant may enter the portable diesel air compressor machine head without going through the cooler. As a result, the oil temperature cannot drop, resulting in over-temperature. The main reason for its failure is that the elastic coefficient of the two large and small thermal springs on the valve core changes after fatigue, and cannot normally operate with temperature changes. The second is that the valve body is worn, the valve core is stuck or the action is not in place and cannot be closed normally. It can be repaired or replaced according to the situation.

PetroChina custom KINGBILL diesel engine 750 cfm air compressor

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