Performance curve of water ring vacuum pump

Vacuum pump unit is a form of using multiple pumps in groups. For such a vacuum pump unit, its performance curve will be more changed with the previous single water ring vacuum pump, so it has a clear understanding.

The typical engine cooling water pump of water ring vacuum pump is a special application of single-stage centrifugal pump in automobile, which has simple type and complex structure. Because the space size of the engine cooling water pump is seriously limited, the water ring vacuum pump and the operating environment are bad, resulting in its low efficiency and serious cavitation damage. Therefore, it is very important to study the relationship between the efficiency and the structural parameters of the engine cooling water pump, and to explore the key factors that restrict the development of the engine cooling water pump.

As an important part of engine water cooling system, the applicability and reliability of engine cooling water pump are paid more and more attention by the design, manufacture and users. Especially with the continuous quality of the engine, the poor working environment of the engine cooling water pump makes the reliability and cavitation damage of the pump especially prominent, which seriously affects the safe, stable and reliable operation of the cooling system. It is of great significance for the development of engine cooling system to discuss how to improve the reliability of engine cooling water pump and study the cavitation mechanism. Aiming at the key factors restricting the development of engine cooling water pump.

And some scholars have carried out in-depth research from three aspects of energy performance, cavitation performance and reliability, and made a lot of related research results, constantly improving the performance and quality of engine cooling water pump. The efficiency of the engine cooling water pump is 10% - 20% lower than that of the ordinary centrifugal pump, while the efficiency of the engine cooling water pump in China is 7% - 15% lower than that in foreign countries. In order to improve the efficiency of the engine cooling water pump, many scholars have carried out a lot of research work in the performance prediction and internal flow. On this basis, the hydraulic performance of the engine cooling water pump has been optimized design and structural improvement. The research on the internal flow of engine cooling water pump is of great significance to improve the efficiency, improve and optimize the structure. However, these research methods are not perfect. In view of the particularity of high temperature and variable speed of engine cooling water pump, the accuracy of numerical simulation needs to be further improved. High speed photography and PIV test are widely used in common centrifugal pumps as effective test methods to study the internal flow of pumps.

Interchangeable Water Ring Vacuum Pump

Water Ring Pump

Water Ring Vacuum Pump