What are the causes of the heater malfunction?

First, the leak. (1) seal leakage. Shaft seal with the most simple packing (asbestos packing) sealed form, in the process of using packing (asbestos packing) gland method to adjust the seal leakage, the normal seal should be maintained at every minute About 30 drops of the amount of leakage is appropriate, due to the higher hydrophobic temperature, packing (asbestos packing) easy to aging failure, leading to increased leakage at the shaft end, and constantly through the packing (asbestos packing) gland will make The friction between the packing (asbestos packing) and the shaft increases, which accelerates the wear of the packing (asbestos packing) and increases the shaft torque, which in turn increases the pump load. (2) Leakage at the mid-section of the pump. Heater hydrophobic pump with a segmented structure. Intake, middle and out of the static section of the junction with the pad by tightening the bolt to seal. In the high temperature state, due to the expansion of the pump body, the pull rod nut is easy to loosen or the rod is deformed, resulting in the increase of the distance between the middle joint surfaces and the leakage of water. The water quality is not up to standard. Flushing and cooling of packing (asbestos packing) seals are required for the transfer of hot water, necessitating the addition of sophisticated self-cooling and flushing systems. Due to the pressure and temperature instability of the water heater hydrophobic system, resulting in the system of vaporization, the pump cavity is easy to form a negative pressure, shaft seal cooling water or flushing water thus fleeing into the pump chamber, the cooling water and flushing water for running water, and System water is demineralized water (clean water), resulting in pollution of the system water quality, so that water quality can not be achieved Third, the balance of components easy to wear. The volume of the water heater trap is 3 m3. In order to maintain a certain water level, the amount of water supplied to the trap should be kept constant with the amount of water leaving it. Therefore, the amount of auxiliary steam should be kept constant with the pump's operating flow. As the amount of secondary steam increases or decreases, the system temperature and pressure also increase or decrease correspondingly, but the increase or decrease in temperature and pressure do not necessarily match (the match of the saturated vapor pressure and saturation temperature when the liquid is in the liquid state) , So that the system water may be liquid, gaseous or liquid-liquid mixed. Vaporization of the system water or liquid-vapor mixed state, resulting in axial force tends to be unbalanced, balance plate can not be separated, the balance of components easy to wear four, easy to damage the bearing. Pump is used at both ends of the external bearing body structure, in order to prevent water from entering the bearing body, bearing in front of the bearing ring, when the filler (asbestos packing) aging failure, the seal leakage increases, splashed out The hot water across the retaining ring and fleeing into the bearing box, bearing damage easily replaced frequently.