Illustrate bearing rust paint causes and prevention

For water pump motor, bearing paint rust problem is the longest common event. If paint rust problem is also a water pump motor to prevent bearing the customer would like to know. The bearing network ( Hereinafter referred to as:) Through the analysis of the bearing paint rust and summary, understand the bearing characteristics of paint rust, the cause of bearing rust and corresponding prevention countermeasures. Below we together to conduct a comprehensive understanding of the problem. First understand the phenomenon and characteristics of bearing rust paint: paint rust deposit mainly occur in the enclosed machine or closed packing machine. Largely closed motor paint Hugh not easy to escape, because of the characteristics of the paint rust occur mainly the following several aspects: 1, scene: often in the southern region of high temperature and high humidity and high humidity sea rock area. 2, time: normally in the hot season, 4, 5, and 6 months each year into the Treasury of motor in the highest proportion, because after the motor warehousing due to climate change, appear easily condensation. 3, the types of motor: usually enclosed machine or enclosed storage. 4, bearing rust paint has obvious directivity, more serious than the other side, near the rotor end after pick off the cover gasket can smell a very thick paint, sometimes bearing internal rust is more severe than the outside. 5, paint rust bearing grease is a special kind of paint smell, rust is akin to the smell of the insulating varnish. 6, paint rust phenomenon occurs mostly in solvent varnish, sometimes use can also occur without solvent paint ( Insufficient drying time) 。 Under the understanding: paint rust rust mechanism of bearing of the production is affected by internal and external combination: motor bearing with the lacquer rust is the stator insulation varnish from acid molecules react with the moisture is absorbed by the grease. And the type of insulating varnish, drying technology of stator, motor related to the storage environment. When using amino phenol or base class insulating paint, paint molecular chains in the process of hardening unstable low molecular substances to escape. Such as formaldehyde, the temperature and humidity at the right time, formaldehyde reacts with the weather the water molecules in formic acid, formic acid can make grease hydrolysis, rust and corrosion bearing produced lacquer. Using infrared spectroscopic analyzer to analyze paint rust rust taste, can see there are paint rust characteristic absorption lines, so with formic acid iron ( Characteristic absorption peak) Same, can be thought of as formic acid caused by rust. Again understanding, the cause of Qiu Xiu bearing rust paint refers to the induced factors, in the process of bearing rust paint test, found that the severity of the bearing paint rust and humidity have a close relationship, it is generally believed in 70% RH conditions and rust easily happened paint, which with the vast majority of paint rust occurred or in the south coastal fits with the imagination of the rainy season every year. 2, stator 1, climate environment: high temperature and high humidity drying incomplete; 3, motor bearing seal in storage; 4, the severity of the paint rust have been mainly depend on the ingredients. 5, paint, rust prevention, Bearing seal and rust, grease types) Again, understand the paint rust bearing features: paint rust bearing on general motors inside a face, corrosion is serious, will happen in the first a close to the edge on inner and outer parts of the oil deterioration, yellowish-brown commonly. Finally understand, paint rust prevention countermeasure scheme is to sum up, bearing paint rust prevention must be on its mechanism, from the motor design and manufacturing, insulation and bearing into consideration, we will work up the preventive measures are as follows: 1, avoid completely sealed, opens air as much as possible; 2, make traditional Chinese medicine (TCM) to ensure the drying time of insulating varnish, preferably in the stator after drying, placed in ventilated place natural ventilation, the gas released in full, the stator is in use process should be first in first out principle. 3, in the process of warehouse storage, not close to the wall and corner of the room, on a tray on the bottom, to ensure that the ventilation, humidity, try to be less than 70% RH. 4, don't escape the stability of low molecular acid type insulating paint ( No solvent such as epoxy insulating paint) And production process in strict accordance with the requirements of production. 5, choose in grease, mineral oil as base oil of grease. 6, the sealed bearing.