Affiliation:
1. Kaliningrad State Technical University
2. Baltfarmatsevtika LLC
Abstract
Lobe pumps do not damage the structure of a highly viscous substance. Therefore, the lobe pumps are increasingly used for pumping the liquid food products, despite the high cost. For selecting the rotary lobe pumps, the dependences of the productivity on the pressure drop are necessary. Some manufacturers of the lobe pumps post online the dependences of these characteristics on the rotor speed. There is considered a method developed for calculating the performance diagrams of lobe pumps (Q–P) subject to the influence of the viscosity of pumped liquid food products based on the results of the tests. For example, the characteristics of WEB RF-024, Pomac PLP 1-1.5 when pumping fish oil are considered. The analysis of the test results showed the need to take into account in the calculations the minimum speed
of rotation of the rotor n0, at which pumping of the liquid begins. It is stated that the minimum rotational speed n0 is
a nonlinear function of pressure drop. The volume of liquid pumped in one revolution does not depend on the pressure drop. The volume of liquid with high viscosity pumped in one revolution does not depend on the pressure drop. An in-crease in the temperature of fish oil leads to a decrease in the performance of the lobe pump.
Publisher
Astrakhan State Technical University
Reference17 articles.
1. Chinyaev I. A. Rotary pumps. L.: Mechanical Engi-neering Publ., 1969. 216 p., Chinyaev I. A. Rotary pumps. L.: Mechanical Engi-neering Publ., 1969. 216 p.
2. Podrezov A. Pumps for the food industry // Milk Proc-essing. 2016. N. 9 (203). P. 26–27., Podrezov A. Pumps for the food industry // Milk Proc-essing. 2016. N. 9 (203). P. 26–27.
3. Lugovaja I. S. Classification of hydraulic systems for pumping highly viscous liquids // Science and Technology. 2019. V. 18. N. 5. P. 422–426., Lugovaja I. S. Classification of hydraulic systems for pumping highly viscous liquids // Science and Technology. 2019. V. 18. N. 5. P. 422–426.
4. Yang D. C. H., Tong S. H. The specific flow rate of deviation function based lobe pumps – derivation and analysis // Mechanism and Machine Theory. 2002. V. 37. P. 1025–1042., Yang D. C. H., Tong S. H. The specific flow rate of deviation function based lobe pumps – derivation and analysis // Mechanism and Machine Theory. 2002. V. 37. P. 1025–1042.
5. Kang Y., Vu H., Hsu C. Factors impacting on perform-ance of lobe pumps: A numerical evaluation // Journal of Mechanics. 2012. V. 28 (2). P. 229–238., Kang Y., Vu H., Hsu C. Factors impacting on perform-ance of lobe pumps: A numerical evaluation // Journal of Mechanics. 2012. V. 28 (2). P. 229–238.