Screw air compressor cleaning and maintenance --8. Correct all parameters
When the machine is cleaned and installed, the operation parameters of the air compressor should be adjusted to ensure the normal and safe operation of the social security:
(1) the preparation of screw air compressor before starting:
Belt (coupling) correction: if the air compressor is driven by belt, then the belt should be between 10~20 mm tightness. If the compressor is coupling, after installation should drive motor and host and check the balance of the rotating shaft coupling. The screw air compressor coupling basically adopts the elastic coupling, when the balance of the solid is not big, it can be ignored.
Screw air compressor mainframe: such as the correction to remove the main power in the maintenance process, pay attention to the reversing of the motor power supply should be back after the direction of the motor should be based on the host to host the correct steering check mark icon on the host to.
Correction method: the exchange of three-phase power in any two power lines can be.
(2) loading and unloading, the proportion of value effect is: setting the three parameters, we should first determine the value of unloading, unloading value should be determined according to the combination of the rated pressure of air compressor and gas end the pressure required to determine a good value after unloading, and then set the load value, the pressure should be 0.1 ~ 0.2MPa, set up the unloading and loading value, finally set the percentage value, ratio of value and value of loading unloading should be located in the middle, screw air compressor for example, such as gas pressure of 0.8MPa in a factory needs air compressor, air supply and demand is relatively stable, it should be set as follows: three parameter setting of 0.8MPa loading unloading pressure. The pressure set between 0.65MPa, the proportional control set pressure 0.73 ~ 0.75MPa.
Screw air compressor: set the parameter correction method in microcomputer controller (such as the control of air compressor using button control, while loading and unloading parameters from pressure switch adjustment, the proportion of value should be in the regulation of the value reduction valve proportional valve on the adjusting nut).
(3) the internal pressure efficiency of the unit is: the internal pressure of the unit should be between 0.2 and 0.45MPa.
Correction method: the pressure value should be carried out in the unit unloading operation, the value of the adjusting nut the minimum pressure valve adjustment, in order to facilitate reading the setting value, the pressure should be taken before the minimum pressure valve test and install pressure gauge (part of microcomputer controller inner pressure parameter display function, if not the the function should be installed before the minimum pressure valve pressure gauge).
(4) high temperature protection value is positive: when screw type air compressor works normally, its temperature should be between 65~98 degrees centigrade. The automatic stop temperature shall not exceed 105 degrees when the temperature is too high.
Correction method: in the controller to adjust the high temperature automatic shutdown temperature, to 1.2 is appropriate (that is, enlarge the 20% margin).
Summary
The correct maintenance of the service life and reliability of screw air compressor plays a vital role, and the air compressor is cleaning maintenance service customer service personnel, a skill and equipment operating personnel must master.
