Cold storage compressor as the heart of the entire refrigeration system, must do focus attention, even a small failure may cause cold storage refrigeration system failure, resulting in losses, so the operator in the operation of the refrigeration system must be careful, careful. Here to give you a summary of the cold storage compressor operating abnormalities are.
First, due to defects in moving parts caused by the cold storage compressor operation of the abnormal phenomenon is summarised below:
1, with and sealing parts of the friction of another piece of heat higher than normal;
2, with the part of the impact of vibration sound;
3, the required tightness of the steam valve damage or damage to the valve itself;
4, cold storage compressor tightness damage.
Cylinder friction parts, crankcase shaft seal and bearing heating degree is higher than normal, can be directly by hand or indirectly according to the cold storage compressor crankcase lubricant temperature as well as according to the exhaust temperature to determine. Friction parts of the heat than the machine room air temperature is about 20 ℃ higher than the temperature is considered permissible.
Second, the friction part of the heating degree is higher than the normal value of the main reasons are as follows:
1, due to oil pump failure; filter clogging, lubrication system tightness damage, crankcase oil level drop or oil pressure regulator adjustment is not correct, etc., to the friction parts of the oil supply is insufficient;
2、Used oil viscosity is not suitable or too dirty;
3, with the other parts assembly is not correct, the result of the formation of the gap is not enough, or in some positions there is no gap at all;
4, the shaft seal is hotter than normal temperature, may be due to the result of high pressure in the crankcase of the cold storage compressor. In this case, the oil pressure inside the shaft seal greatly exceeds the atmospheric pressure, thus the unit pressure of the shaft seal friction pay rises.
Third, the reasons for the impact sound are:
1, the friction parts between the gap increases due to wear and tear;
2, the damage of another piece (often damaged is the steam valve and piston ring);
3, linear clearance volume is not enough, so the piston hit the cylinder head or exhaust valve;
4, cold storage compressor wet compression, so that the liquid refrigerant into the cold storage compressor cylinder, into the amount of more than the cylinder in the she clearance volume, into the cylinder of water and oil in excess or another piece of broken fragments fall into the cylinder;
5, the damage of large parts (connecting rod, connecting rod pin removal, crankshaft damage). Steam valve due to wear and tear or damage caused by the tightness of the destruction, or its own damage, will make the exhaust gas temperature. Multi-cylinder cold storage compressor a cylinder steam valve damage, can be used to determine by hand according to the cylinder and the rest of the cylinder compared to a higher-than-normal temperature;
6, horizontal cold storage compressor can be based on the suction valve valve cover on the degree of frost layer melting to determine whether the suction valve failure;
7, detachable connection parts (cylinder head, crankcase, valve flange, shaft seal) of the laxity of the refrigerant and lubricating oil loss and air sucked into the system. In the use of toxic and explosive refrigerants within the device, the emergence of a lack of tightness will cause poisoning and explosion of the work of the danger.
Post time: Aug-25-2023
