The main features of high viscosity pump are: ① radial hydraulic pressure, radial meshing force balance, so the pump life and reliability greatly improved; ② pump output displacement and flow, small flow pulsation. So that new products with higher added value and competitive advantage, in order to deal with the lack of the traditional two-gear gear pump supply a new path, can replace the existing gear pump, screw pump, etc., in the petrochemical, light industry, food High viscosity liquid industries such as the development and application prospects promising. At present, there are still very few open and open applications in this area in our country and there is plenty of room for development.
In the petrochemical industry, the delivery of highly viscous liquids (such as synthetic rubbers, resins, polymeric liquids for fibers, etc.) is one of the major consumer processes, and the machines used to dispense liquids are all types of pumps. Because of the higher viscosity of the liquid, the pump suction resistance larger, in order to ensure that the pump has a set of self-priming, weekdays using positive displacement pump to keep high viscosity liquid. Gear pump is the most simple type of positive displacement pump, because of its simple structure, light weight, low cost, large viscosity changes, the liquid is not sensitive to dirt in high viscosity pump suction function, work Therefore, it is often used in places where the conditions are worse and where the accuracy is less demanding. With the new technology, new materials, new technology from time to time emerged, as the past can be thought of as a high-viscosity liquid can be sent to protect, through research and improvement, now also be able to use high-viscosity pump to keep it. In addition, high-viscosity pumps can also be used as booster, inclusion, metering and spinning of high-viscosity liquids. Liquids that are delivered by high-viscosity pumps are often solid at room temperature and liquid at the time of insulation. Therefore, high-viscosity pump in the delivery of these liquids, not only to deal with the problems caused by high viscosity, and often with high temperature, erosion and other extraordinary problems analysis to study the type of high-viscosity pump problems and preventive measures as a reduction in problems downtime, progress The quality of the pump, the useful means of delaying the useful life of the pump, is increasingly being people's attention. Type of high viscosity pump problems In the diagnosis of high viscosity pump problems, people found that most of the problems of the gear pump is not a sudden onset, with the city in advance there are some signs, such as vibration, noise, leakage, fever, etc., to A certain level before it causes problems. If these signs can be found in real time and be tempered or swept away, the chances of the high-viscosity pump becoming defective are diminished. Therefore, to understand the typical types of high-viscosity pump problems, help to dissect the content of contact, thereby further affirming the type of problems and the cause of the problems, parts.
1. No outlet pressure or lack of pressure It is noteworthy that the pump can not stress, it is only the output flow. Low pressure or no pressure, to clarify the high viscosity pump did not inhale the liquid or leak serious.
Countermeasures: Electric power output is too small, too large gear pump displacement or pressure is too high, it will form a lack of pressure. Of course, the pressure gauge is damaged or pressure gauge 撙 section hole infarction also showed no pressure, then you can dress up a new pressure gauge inspection.
2. no flow or lack of liquid If you confirm the pump no flow output, may be due to the pump device is incorrect, the pump error, or the suction side (inlet and suction pipe) infarction, outlet check valve fitted anti Or stuck, it is also possible that the drive shaft is broken. High-viscosity pump at low speed will cause a lack of fluid volume, this phenomenon is often due to the pump drive installation skid or lack of power due. At this point should check the actual speed of the gear pump, pump and motor connection and the power of the state and so on.
3. Abnormal vibration and noise Because of the high viscosity of the working medium viscosity of the pump, and thus prone to suction phenomenon and stimulate greater noise.
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