Four kinds of compressor safety protection measures to share

    As the most important part of cooled water chiller, compressor is the important part of cooled water chiller, and the maintenance cost of compressor is relatively high.. In order to reduce the maintenance cost of cooled water chiller, BUSCH is made from the following 4 aspects to protect the compressor of cooled water chiller, in order to achieve the purpose of reducing the maintenance cost of cooled water chiller.

To prevent the liquid hammer
     Under normal working conditions,refrigeration compressor of industrial chiller should the refrigerant vapor inhalation on, if the refrigerant flow, negative thermal load change too fast, improper operation may inhalation of vapor or liquid refrigerant and even more and lubricating oil into the cylinder, if too much into the liquid, not from the exhaust valve discharge, the pressure in the cylinder will be a sharp rise high formation liquid hammer, cylinder, valve, piston, connecting rods and other parts damage. Therefore can take various protective measures, such as installing a gas-liquid separator, the entrainment in the low pressure vapor liquid separation, ensure the compressor stem travel; installing oil heater, in the compressor before starting on the lubricating oil added, reduction of dissolved in the lubricating oil in the refrigerant; or valve assembly with a spring is tightly pressed on the end of the cylinder, is formed to cover the fake;

Pressure protection
1. The control of suction and exhaust pressure: high and low pressure controller, which is composed of high pressure control section and low pressure control part.. If the exhaust pressure exceeds a given value, high voltage control cutting off part of the compressor power, the compressor is stopped; suction pressure falls below a given value, low voltage control cutting off part of the compressor power, make its downtime, and send out the alarm signal.
2, safety valve: to prevent the leakage of refrigerant to the atmosphere, the general use of closed type safety valve, safety valve installed in the cold water compressor exhaust chamber and air suction chamber between the tube.
3, safety film: safety diaphragm installed between the suction, exhaust cavity, suction and discharge pressure difference exceeds the specified value, rupture of the diaphragm, exhaust pressure decreased (filter mounted in the suction side of the cavity, prevent crushing diaphragm into the suction chamber).
4, lubricating oil pressure difference controller: the hydraulic pump inlet and a hydraulic pump outlet respectively and lubricating oil pressure difference controller on the low pressure inlet, a high-pressure outlet connected, when the hydraulic pump, between the inlet pressure difference is too high or too low, the controller will cut off the power of the compressor, the motor stops running, to protect the compressor.
Protection of internal motor
    Overheat protection, to further ensure the motor is not overheating, in addition to the right to use, pay attention to the maintenance, but also can be installed over temperature relay; and lack of protection, the commonly used three-phase motor phase absent words will lead to motor can't start or overload, overload relay with avoiding the motor due to missing are damaged.

Temperature protection
    The temperature here refers to the exhaust temperature and the housing temperature of the industrial chiller. Exhaust temperature protection method is mainly thermostat will be placed near the outlet and induction to the exhaust temperature through the high, thermostat act to cut off the circuit; unit shell temperature is too high will, the service life of the compressor, mainly due to the condenser for heat capacity caused by insufficient, so to check check condenser of air or water, the water temperature is appropriate. And check whether the refrigeration system is mixed with air or other non gas, or air temperature too high reason, should pay attention to observe and detect.

Tags:compressor,safety protection,measure