How to improve the quality of products, the use of heat transfer oil pump should pay attention to what issues? Years of experience in the production of heat-conducting oil pumps and some solutions to the problems encountered in handling heat-conducting oil pumps over the years. We hope we can help customers who are using heat-conducting oil pumps.
As we all know, when we mention that we know that the medium being conveyed is heat conducting oil, the temperature is generally high. In fact, in many cases, the heat conducting oil pump is not a heat conducting oil, but some other high temperature medium. Due to the high thermal conductivity of the medium transported by the oil pump, the safety factor for the thermal oil pump is higher. Must start from the root cause, including heat-conducting oil pump for each component of the processing process has strict requirements, in order to ensure the quality of heat-conducting oil pump products.
First of all, from the structure of speaking, the thermal oil pump is mainly composed of the pump body, pump cover, bearing body, bracket, spindle, seal, bearings, impeller eight large components. Pump body, pump cover material is now mainly used in domestic steel ZG230-450 more, you can also use ductile iron material, the two materials compared to the latter wear resistance and hardness and temperature resistance due to the former.
However, the cost of good ductile iron is higher than the cost of cast steel processing, the former is that once the parts appear stomata or trachoma can be solved by welding, while the latter requires a high welding process, so the latter parts Processing scrap rate higher.
The other is the bearing body are generally made of ordinary cast iron material, the bearing body and the media do not touch, mainly for the assembly of two bearings to carry the spindle and the heat pump impeller, the bearing body is the key bearing at both ends of the processing is concentric, if Concentricity difference, then the service life of both ends of the bearing will certainly be shortened, so the level of concentricity directly affects the bearing life, it is equivalent to a direct impact on the life of the heat-conducting oil pump. The next is the spindle, the spindle material should be used 1Cr18Ni9Ti, but now generally small manufacturers use 40Cr quenching and tempering, the main spindle quenching position is the bearing bit, seal bit and shaft and impeller position. Then there is the main shaft of the oil pump must be grinding shaft, radial balance and dynamic balance testing, the purpose is to improve the wear resistance of the key parts and the spindle concentricity, in order to improve the quality of the heat transfer oil pump.
Seals and bearings are another key component of the heat transfer oil pump, now commonly used heat transfer oil pump seal with a high temperature carbon fiber packing, PTFE seal, PTFE seal combination of mechanical and mechanical bellows seal. Our daily most commonly used is the high temperature carbon fiber packing and PTFE seal with the use of its point is that the packing is better flexibility, the disadvantage is not resistant to corrosion, once the medium corrosive elements, the seal is relatively easy damage. Routine maintenance or replacement easier, the operation is relatively simple.
If the use of PTFE sealed, the sealing effect is better than the former, but also has excellent corrosion resistance, the shortcoming is too fat shaft, long service life, but once the heat transfer oil pump leak, under normal circumstances this pump Shaft position will be worn seal, you need to renew the shaft.
The cost of using a bellows mechanical seal is too high, but the service life is longer than the first two, which is troublesome to maintain or replace. The last one is the heat pump impeller, the general use of cast steel or ductile iron, the key is the impeller machining process and impeller balance, each impeller processing must be dedicated impeller balancing machine for testing, proofreading to ensure that the diameter of the impeller To balance and balance. In order to ensure the quality of heat transfer oil pump.
Gelcoat Resin is a kind of resin, has the advantages of chemical erosion resistance, abrasion resistance and aging resistance, and plays a protective role for the surface of products
Gelcoat resin is a kind of resin, has the advantages of chemical erosion resistance, abrasion resistance and aging resistance, so it plays a protective role for the surface of products. Because gelcoat resin makes products have high gloss, good weather resistance and wear resistance, and excellent technology, so it is the first choice of many FRP manufacturers. It is very important to select high quality gelcoat resin and correct application process.
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