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What does the flake ice machine manufacturer tell you about the role of lubricating oil in cold storage equipment?

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What does the flake ice machine manufacturer tell you about the role of lubricating oil in cold storage equipment?

Release date:2017-04-26 Author: Click:

     In general, refrigeration compressors are lubricated with oil. Lubricating oil enters the moving parts of the compressor (bearings, rotors, cylinder walls, etc.) through the oil pump or the pressure difference between the high and low pressure ends.

      The specific role of lubricants in refrigeration systems  

    

     Refrigerating oil is the lubricating oil of the refrigeration compressor. It mainly plays the role of lubrication, sealing (controlling the volume gap), rust prevention, cleaning and cooling in the refrigeration compressor. Of course, some refrigeration systems also use refrigeration oil as the capacity to unload the pressure Use oil, such as spool valve drive of screw unit. Refrigerating oil also circulates continuously in the refrigeration system, usually called oil circuit. Different compressor types, unit sizes, and refrigeration oil circulation methods are different. In the refrigeration systems of piston and screw compressors, the freezing oil acts on bearings, the friction volume of the compressor control volume (cylinder or meshing gear, screw) and the actuator of the control system; in the compressor control volume, refrigeration Oil and refrigerant are in direct

contact and mixing occurs. In large systems ( chillers group, central air conditioning refrigeration units, etc.) is generally provided with an oil separator, an oil blend of the refrigerant discharged from the compressor is separated most of the oil in the oil separator, the separated oil was cooled After the compressor cools, the oil filter returns to the crankcase of the compressor, and is pressurized by the oil pump for the next cycle; a small amount of inseparable oil is circulated in the refrigeration system with the refrigerant or the like in the relevant equipment, it is difficult to return To the crankcase. For small systems (such as refrigerators, household air conditioners, etc.), the oil circulates in the refrigeration system with the refrigerant, returns to the compressor from the suction pipe, and re-enters the oil circuit through the splash device. In the centrifugal refrigeration system, the refrigerant does not directly contact with the oil in the lubrication system, so the appropriate industrial lubricant can be selected according to the bearing lubrication theory; when the gas leakage affects the oil in the lubrication system, the compressor special lubricant should also be used ; When the speed-increasing gear is attached, the gear box oil should use lubricating oil with certain abrasion resistance.

 

     Particular requirements for lubricants in refrigeration systems   

 

     Refrigerating oil will encounter some special working environment when working inside the manufacturing system. For example, the direct contact between the freezing oil and the refrigerant, a small amount of refrigerating machine oil will participate in the refrigeration cycle along with the refrigerant. The materials such as coils and seals are in close contact, and the refrigerating machine oil is operated under extreme temperature conditions such as the high temperature of the compressor exhaust valve, the expansion valve, and the low temperature of the evaporator, etc.

 

Consultation phone number of  Shenzhen flake ice machine manufacturers : 0755-23696779 .

 


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