Safety valve used on the cold storage 81OF7O compressor. Common tanning devices are high and low pressure pressure tweens, which are composed of high pressure tanning partial and low pressure tanning. The opening pressure of the safety valve is adjusted with a screw 7. When the pressure difference between the hydraulic pump outlet and the inlet is too high or too low, the controller acts to cut off the compressor power supply and the motor stops rotating.
4 Lubricating oil pressure difference controller. In order to ensure the satisfactory lubricating oil of the compressor moving device, and to ensure the normal operation of a certain compressor chest mechanism (such as: hydraulic cylinder and a lever open mechanism), it is necessary to control the oil pressure difference. When the pressure of the exhaust air exceeds a given value, the high pressure clamps the local action, cuts off the compressor power supply, and the compressor stops. When the pressure force of the suction atmosphere is lower than a given value, the low pressure clamps the local action and cuts off the compressor power supply, so that When the compressor is stopped, the sound and light alarm signals will be emitted at the same time. 1 The pressure of the atmospheric pressure is clamped. In order to prevent the broken diaphragm from falling into the suction chamber, a filter screen 6 is installed on the side of the suction chamber to take care of the compressor.
2 safety valve. Install a safety diaphragm between the suction and exhaust chambers. To prevent the leakage of refrigerant to the atmosphere and use a closed safety valve, the safety valve is placed on the line between the compressor discharge chamber and the suction chamber. To this end, the cold storage hydraulic pump population and the hydraulic pump outlet are connected to the low pressure population and the high pressure outlet on the lubricating oil regulator. The lubricating oil pressure difference is the difference between the oil pressure at the outlet of the hydraulic pump and the oil pressure in the crankcase. When the pressure difference between the suction and discharge atmosphere exceeds the specified value, the diaphragm is cracked, and the pressure of the exhaust air is reduced. The office principle is as follows: the spring force of the spring 4 and the pressure force of the suction atmosphere are applied from the F part to the valve disc, and the pressure force discharging the atmosphere is applied from the upper part.
3 safety film. Because the air temperature of the compressor discharge is high, the material of the safety diaphragm is generally nickel, copper or pig iron, and the thickness thereof is between 005 and 03 mm due to the difference in diameter and pressure difference. When the compressor is running, due to the end of the system or the end of the compressor itself, there may be a situation in which the pressure of the exhausting air is too high or the pressure of the atmospheric air is too low. Therefore, it is necessary to suck up and exhaust the atmosphere. Pressure. When the pressure of the exhausting air is out of time, the valve disc 3 moves downward, and the side hole of the lower part of the valve seat is opened, and the high-pressure gas body passes through the side hole and the lateral hole in the valve body 5. When the pressure of the exhausting air is lower than the prescribed value, the pressure force of the valve disc 3 sucking the atmosphere and the elastic force of the spring 4 are increased, and the exhaust pipe is closed.