Screw Compressors, Why Does It Hurt?
Screw air compressors are devices that compress the air in the atmosphere under high pressure. The gases in the air during this compression,the effect of the impingement heat they produce.For this reason, the pressure while the compressor is running and compression screw gears, there’s a group that does the work that is in contact with since we released heat generated due to heat transfer and heat up the fat injected into the compressor and screw in the screw group on the air from the atmosphere and reduces the heat load in the group came up with by providing lubrication, bearing, seal, reduces the wear of parts such as ETC.
In short, the compressors in very cold weather when it is not operated for a long period and all of a sudden while upset is taken into the circuit is described as seperator, oil recycling, separating the compressor and the compressed air into the filter from inside the lubrication system of the ignition starts. Typically as a result of this fire, separator, minimum pressure valve, radiator and oil cooler air of some or all of the air are damaged.
Before detailing our article related to the combustion compressor, the compressor on get to know the equipment:
1 – Air Filter
2 – Screw Group
3 – oil tank and oil
4 – seperator filter (oil-air separator)
5 – Minimum Pressure Valve
6 – Oil Filter
7 – Thermostatic Valve
8 – Oil Cooler Radiator
9 – Radiator Air Cooler
10 – Skavenc (oil return Line)
1 – air filter :air filters and dust from the atmosphere of the screw compressor Gib sucking prevents foreign material to enter the group. Usually 15 micron filtering sensitivity is preferred. Compared to the more sensitive or less sensitive designs, manufacturers may elect to have filters.
2 – the screw group:consists of two asymmetric gears front and rear and two merkezlemey adjust the sensitivity between the gear and the bearings that secure it. Screw one of the groups has a direction of rotation the direction of rotation and only correct air they produce. Usually when the structure is rotated in the opposite direction of the gear is damaged.
3 – oil tank :cooling system needs of the oil depot and the air pressure of the compressor that makes the task much pressure there is a pressurized container. Although it looks like an ordinary tank, each manufacturer of oil in the oil tank with extremely rigorous engineering design of air circulation in a variety of ways by providing separation and is working to reduce the amount of oil that goes to the filter seperator.
4 – Separator : the screw compressor circulating in the system that separates it from the compressed air produced a special oil filter. a very sensitive and has an accuracy of 3 microns filtering paper. Compressed air through the filter from the oil tank and the oil remains in the oil is separated. the small amount of remaining floating in the air can accumulate in the oil separator on the bottom of the dish we call skavenc line connection thanks to the screw group are returned.
5 – minimum pressure Valve :as the name suggests, was first turned on or when the compressor while the compressor is running at idle the oil tank within the system and the lubrication of the screw group to keep a certain pressure must remain. This 4 bar minimum pressure(in kg/cm2) air pressure 4 bar minimum pressure produced when the first compressor starts to work until the Valve provided to the system when it reaches a value of 4 bar pressure and prevents the opening generated by the system returns to the air. This Valve also acts as a check valve which prevents air compressor air tank back into the system.
6 – oil filter :oil filter compressor oil circulating in the system that occur in sediment and corrosion, etc, and removes waste from these wastes which are highly sensitive prevents to enter the group of the screw.
7 – Thermostatic Valve :thermostatic Valve is a vital part for your compressors. When you first started working compressor, oil tank, oil screw screw directly in the group by sending prevents lean operation of the group. Usually 70 C and 80 C, 85% thermostatic valves compressors is widely known. The compressor oil temperature of 70 ° Cwhen it reaches in thermocouple (isilikili) thanks to the slowly cooling through the radiator by opening the oil allows it to be given, thus the balance of the internal temperature of the compressor can be ensured.
8 – Radiator oil cooler : the compressor cools the oil in the system and allows the system to remain at a certain temperature. Compressor manufacturers often more durable and heat-forwarding feature is good because it uses aluminum radiator.
9 – air cooler radiator :more cooling air from the compressor provides compressed air into the tank for cold storage.
10 – Skavenc (return line) :a small amount of oil accumulated in the oil separator back to the screw group allows it to be absorbed. On this line, usually a check valve is used. This compressor is stopped, the check valve prevents you from pressing the oil separator of the screw when in a group.
Now let’s go back to our main subject which is the combustion event
Events are divided into 2 groups according to the reason of occurrence of combustion.
A – Burning Electrical:
a – Burn the compressor resulting from static electricity:
Good ground screw compressors that need to be made before commissioning device. When removing the oil from the compressed air filter seperator because it creates a static electrical charge passing through the air filter. This can be thousands of volts of electric charge, and won’t harm a living thing because it is static. For this reason a compressor that doesn’t connect to ground but the system may burn. The high pressure that occurs in the compressor, and oxygen in atmospheric air under pressure triggers it. Static electricity pulverized on the paper and combine with the oil separator tiny spark that have become already the combustion of the filter, and the separator through the air towards the oxygen inside the air cooler thanks to this area will cause a flare up. An explosion that ultimately damages occur on major equipment and compressor. This is the easiest way to pass in front of the fire like the compressor is not connected to any other device that belongs to a ground line. 1-2 feet tall land will be buried in a non-insulated copper busbar and line compressor of the compressor because of the static electricity that the connection to prevent burning.
b – electrical contacts connected to Fires:
Compressors are usually very severe conditions,and check in periodically, that is not always done regular maintenance is neglected in this genre because it is the device that fires are very common situations. The connections of the electric motor of the compressor, the network with star-Delta Connection Between the thick power cables connections in this genre usually it is the cause of fires. Outside of these cables are becoming a consistently high Ampere current carrying stringent over time and is isolated from oxidation when exposed to the open air as they distort. For this reason, a good portion of the conductive transfer of electricity because it is not a specific part of the cable falling on the compressor unit to overheat and increases the amount of cable pulling more current Ampere and has caused it to ignite. For this reason, the eye that is located on the compressor continuously deforming or thick cables and power cables should be checked with the isolated oxidized should definitely be changed! Also, these links should be tightened periodically. Vibration may result in the loosening of the Bolts on the compressor in the doldrums.
B – due to combustion of oil and Yagsizlik:
a – linked to the use of poor quality oil Fires:
Screw compressor systems working under high pressure and at high temperatures by the quality of the oil that is used is very important. The technical features of the oils in the section ‘ignition temperature or the degree of relapse,flashpoint’ writes phrases like, and these oil brand, according to, as already mentioned, is expressed in the different names. This term is very important, and the compressor under high pressure can cause it to flare up. So the oil in the compressor make sure that the ignition temperature is very high that you will use. Do not use oil oil brand by being an inappropriate or cheap. Well to raise the ignition temperature should be C? 200 215 225 C C C usually on the oil cans in the technical specifications, such as values are read. For example, we use an oil which we as a company 225 C ignition temperature. Of course, the higher the combustion temperature if it is safer.
How do you burn fat? What causes the fire in the compressor?
Seen in this genre is especially fires in large-capacity compressors, compressors for example 75 kW and above the correct oil is used, unless it is very clear in this genre fires. If compressors or compressor thermostatic valve when this situation a smaller scale can also be seen.
Appropriate screw compressors used in oil and fat what is the number?
ISO VG 68 ISO VG 46 mineral oil that is used in screw compressors numbers ofit. Screw air compressors this oil can be used. Does not apply to other machines running with the screw. (screw refrigeration compressors, etc.)
What Brand Of Oil Should I Use?
You need to opt for known brands and consider the details mentioned above. Mobil rarus series oils are recommended by US, Shell Corena ( in the absence Tellus)
b – Yagsizlik due to Combustion:
This kind of burning is the lack of a thermostatic valve on the compressor that should be the main cause. Thermostatic valve of the compressor is connected in very cold weather because the oil cooler is clogged or groups in situations where the screw will be damaged by staying lean, however, is suddenly exposed to oxygen and high temperature compressor with the oil circulating in the system causes a sudden flash of fire.
May cause burns and serious injuries giving rise to the above mentioned. For this reason, the compressor and the compressor is very good to work with well-known technical information about the companies we recommend. Accidents of this kind to avoid giving rise to the original equipment manufacturer’s specifications or equivalent should be used in cases when you are not working you are working with the manufacturer of the original and are taken to ensure that the company is using high quality material we want to emphasise that.
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