Time：

2022-07-08

We all specify that after the cleaning, maintenance and installation of the machine are completed, the operating parameters of the screw air compressor should be adjusted to ensure the normal operation of the screw air compressor. The following editor will briefly talk about how to correct the screw air compressor after maintenance. parameter. (1) Preparations before starting the screw air compressor: Belt (coupling) calibration: If the air compressor is driven by a belt, the tightness of the belt should be between 10 and 20 mm. If the air compressor is driven by a coupling, after installation, the motor and the main engine should be manually turned to check the balance when the coupling rotates. Screw air compressor couplings basically use elastic couplings, which can be ignored when the deviation of the solid balance is not large. Steering correction of the main engine of screw air compressor: If the main power supply is removed during the maintenance process, after the power supply is connected, pay attention to the forward and reverse rotation of the motor. The steering of the motor should be based on the steering of the main engine. Steering icon. Correction method: exchange any two power lines in the three-phase power supply. (2) Loading, unloading, proportional value effect: when setting these three parameters, the unloading value should be determined first, and the unloading value should be determined according to the combination of the rated pressure of the air compressor and the pressure required by the gas end, and the unloading value should be determined. After setting the loading value, the pressure difference between the two should be between 0.1 and 0.2MPa. After setting the unloading and loading values, set the proportional value. The proportional value should be set between the unloading value and the loading value. The screw air pressure Machine example description: If a factory needs the air supply pressure of the air compressor to be 0.8MPa, and the air supply requirements are relatively stable, three parameters should be set as follows: the unloading pressure is set to 0.8MPa, the loading pressure is set to 0.65MPa, and the proportional control pressure is set. Set between 0.73 and 0.75MPa. Correction method of screw air compressor: Set this parameter in the microcomputer (if the control of the air compressor adopts button control, the loading and unloading parameters should be adjusted from the pressure switch, and the proportional value should be on the unloading valve. The adjustment nut of the proportional valve adjust this value). (3) Positive pressure effect in the unit: the internal pressure of the unit should be between 0.2 and 0.45MPa. Correction method: the pressure value should be carried out when the unit is unloaded, and the value should be adjusted on the adjustment nut of the smallest pressure valve. In order to facilitate reading the set value, the pressure detection point should be taken before the smallest pressure valve Install a pressure gauge (some microcomputers have the function of displaying internal pressure parameters, if there is no such function, a pressure gauge should be installed before the smallest pressure valve). (4) The high temperature protection value is positive: when the screw air compressor is working normally, its temperature should be between 65 and 98 °C. The automatic shutdown temperature of over-temperature protection shall not exceed 105℃. Correction method: adjust the high temperature automatic shutdown temperature value in the panel, and 1.2 is appropriate (ie, enlarge the margin by 20%).