Description of liquid hammer fault of heating cooling circulator

When using the heating cooling circulator, the compressor, as an important part, needs to pay high attention to its performance In case of liquid hammer fault, the maintenance personnel should give technical guidance to solve it in time The liquid hammer of the heating cooling circulator is divided into two parts When more liquid refrigerants, lubricants or mixtures of the two enter the compressor cylinder at a higher speed with suction, due to the impact and incompressibility of the liquid, it will cause excessive bending or fracture of the suction valve plate; secondly, when the liquid in the cylinder that is not evaporated and discharged in time is compressed by the piston, the huge pressure in the moment will cause deformation and damage of the load-bearing parts The compressor of the heating and cooling circulator is a mechanical equipment of compressed gas When the piston of the heating and cooling circulator compresses 1450 times (half sealed compressor) or 2900 times (full sealed compressor) per minute, the time to complete one suction or exhaust process is 0.02 seconds or less The size of the suction and exhaust holes on the valve plate of the heating and cooling circulator as well as the elasticity and strength of the suction and exhaust valve plate are designed according to the gas flow The two-phase flow is a two-phase flow when a lot of liquid drops are mixed in the suction and enter the cylinder The impact of the two-phase flow on the suction valve plate is not only strong but also high frequency, just like the typhoon mixed with pebbles hitting on the glass window Its destructiveness is self-evident The fracture of the suction valve plate is one of the typical characteristics and processes of the liquid impact The connecting rod of the refrigeration compressor of the heating and cooling circulator is broken If the liquid of the heating and cooling circulator is not evaporated and discharged from the cylinder in time, the piston will compress the liquid when it is close to the top dead center Because of the short time, the process of compressing the liquid seems to be a collision, and there will be a metal knocking sound in the cylinder head The high pressure produced in the instant of liquid strike of heating and cooling circulator has great ring breaking property, which leads to bending or even fracture of connecting rod Other compression stress parts (valve plate, valve plate gasket, crankshaft, piston, piston pin, etc.) will also be deformed or damaged, but they are often ignored or confused with high exhaust pressure When checking the compressor of heating and cooling circulator, it is easy to find out the bent or broken connecting rod and replace it, and forget to check whether other parts are deformed or damaged, so as to lay a foundation for future faults The bending or fracture of the connecting rod caused by the hydraulic hammer of the heating and cooling circulator occurs in a short period of time The pistons and crankshaft at both ends of the connecting rod move freely, and generally there is no axle holding or cylinder biting caused by serious wear Although the debris of the suction valve will occasionally cause serious scratches on the piston and cylinder surface after the suction valve is broken, the surface scratches are very different from the wear caused by the lubrication failure Secondly, the fracture of connecting rod caused by liquid hammer is caused by pressure, and the connecting rod and stubble have extrusion characteristics Although it is possible for the connecting rod of the heating cooling circulator to break and squeeze after the piston bites the cylinder, the precondition is that the piston must be stuck in the cylinder The fracture of the connecting rod after holding the shaft is even more different The big end of the connecting rod and the crankshaft are severely worn The force causing the fracture belongs to the shear force, and the stubble is also different After that, before shaft holding and cylinder biting, the motor will be overloaded, the motor will be heated seriously, and the thermal protector will act It may be difficult for users and friends to solve the problem of liquid hammer in the heating and cooling circulator, so it is better for professional maintenance personnel to solve it.