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Roots pump is a more sophisticated machinery and equipment, manufacturing, assembly and use of maintenance have certain requirements, in these areas, if any inadequacies. It will fail. In general, the common faults can be summarized as the following aspects.
Not enough pumping air pump this failure, so that the pump can not give full play to its role. Can not meet the process requirements. The reasons for this failure may be: â‘ pump speed is not enough; â‘¡ lax seal, the intake pipe connections or seals at the leak; â‘¢ pump rotor and rotor, rotor and pump housing, rotor face The gap between the cap and the cover is too large. Increased gas return flow; â‘£ ambient temperature or cooling water temperature is too high.
Pump pumping enough to deal with the following methods.
â‘ If the pump speed is not enough, because the pumping capacity is proportional to the pump speed, so pump pumping capacity will decline. There are two cases: one is the pump speed is not equipped, that is, the pulley diameter is not appropriate (ie, speed ratio is not suitable), change the pulley, change the pulley diameter; the other case may be improper belt installation , Not tensioned, belt slipping and reduced speed. This adjusts the motor position to bring the belt to a tight level.
â‘¡ identify where leaks, for specific circumstances. If the connection flange at the leak, it may be due to loosening of the connecting screw, washer crushing deterioration or flange surface uneven processing. If the gas at the shaft seal, it may be because the sealed cup is not installed or broken, then replace the cup and install positive. If the packing is sealed, it can be pulled out of the filler. Replacement of the new. However, the filler's interface must be beveled and overlap each other. The first lap interface must be staggered with the second lap interface, can not be in the same position.
â‘¢ If the gap between the rotor and the rotor profile is not uniform, turn a circle in a large gap. Another small gap. It is because in the assembly, the synchronization gear meshing conditions are not adjusted. The reason why the pair of synchronous gears made of a fixed wheel gear, foot wheel gear can be adjusted, because the two rotor shape is the yoke surface, to normal meshing with each other. At the same time, the outer end of the transmission gear (synchronous gear) should be in the normal state of engagement. This rotor can be normal transmission, otherwise, will not move, even if the rotation. May also appear in the rotation, the gap between the two rotors big and small. In this state, the adjustable gear wheel Yi Yi screw loose and pull out the positioning pin. Make adjustments so that the meshing of the rotor and the gear meshing at the same time reach the normal state of engagement, then the gap around the uniform, Retighten the screws, re-hinge the pin hole and install the pin orientation. Such as the rotor outer diameter and the pump casing clearance somewhere too large (not everywhere), then you can loosen the cover and the pump housing connection screw, pull out the positioning pin, to be adjusted until all the gaps are uniform , And then tighten the screws, heavy hinge cover and the pump housing pin hole and put the only sales. If the gap between the rotor end face and the end cover is too large, then the seal may be too thick between the pump housing and the end cover , You can remove the mat to replace the thin mat.
â‘£ learned by practice. Ambient temperature increases the amount of exhaust will be reduced. In view of this situation, try to reduce the injection temperature.
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