Simple talk about the method of inspecting the malfunction of the Vulcanizer
Curing machine debugging found that gear pump does not come to oil, the first is to check the rotation direction of the gear pump is correct. Gear pump has left and right, if the rotation direction is not correct, in which the internal gear meshing produced by the volume difference formation of pressure oil will cause oil seal is washed bad and oil leakage. Secondly, check the gear pump inlet end of the oil filter is blocked, will be caused by oil absorption difficulties or not to absorb oil, and produced a suction hose is sucked flat phenomenon. The gear pump is not spinning right. When the pump is not correct, high-pressure oil will be directly through the oil seal, because the general low pressure skeleton oil seal can only withstand 0.5MPa pressure, so it will be the oil seal is washed out. The gear pump bearing is subjected to axial force. The axial force is often related to the connection of the shaft extension and the coupling of the gear pump. That is, when the machine is installed, the pump will be smashed with a hammer or through the installation of screws to pull the pump shaft by a backward axial force, when the pump shaft rotation, this backward axial force will be forced to increase the pump wear. As the gear pump inside is by the gear end face and sleeve end face sealing, when its axial seal end surface wear serious, the pump internal axial seal will produce a certain gap, resulting in high and low pressure oil cavity communication and make oil seal out. This kind of situation in the dump truck industry appears more, mainly is the vulcanization machine sleeve's size is not standard result. The gear pump is subjected to a large radial force. If the gear pump installed coaxial degree is not good, the pump will be affected by the radial force than the vulcanization oil seal withstand limit, will cause oil seal oil leakage. At the same time, will cause the pump internal floating bearing damage. This phenomenon is mostly related to the cleanliness of hydraulic oil, such as the improper selection of oil or the use of oil in the cleanliness of the standard requirements, will accelerate the internal wear and tear, resulting in the leakage. Therefore, the mineral hydraulic oil containing additives should be selected so as to prevent the oxidation of oil and produce bubbles. Through the observation of the fault gear pump sleeve and side plate found that if all the oil cleanliness of the difference will lead to a significant friction on the surface of the groove, and the normal wear of the gear pump seal surface will only produce even surface marks. The oil filter is too dirty to absorb enough oil. The pump installation height is higher than the pump's self-priming height. The suction tubing of the gear pump causes the oil suction resistance to be large. Oil suction nozzle joint leakage caused by oil pump. By observing whether there are bubbles in the tank can determine whether the system is leaking.
The oil pipeline has a foreign body blocked, resulting in an infinite increase in pressure. Safety valve pressure adjustment is too high, or the valve opening and closing characteristics of poor response lag, so that the gear pump is not protected. System such as the use of multi-way directional valve control direction, some of the multi-way valve may be negative openings, this will encounter due to dead-center pressure and suppress the bad gear pump.
Vulcanizing machine system overload, mainly manifested in pressure or high speed. The oil cleanliness is poor, the internal abrasion is intensified, the volumetric efficiency is reduced, and the oil is generated by the leakage of the internal gap. Out of the tubing, oil flow rate is too high, the general oil flow rate is 3~8m/s.