The influence of the location of the rotameter blocks of the circulating lubrication of the bearings of the drying part on the drive power

In the drying parts of boom- and cardboard-making machines, three schemes of arrangement of rotameter blocks of bearing circulation lubrication systems are used. The compact circuit has two rotameter blocks (one on the front and drive sides of the machine). The multi-block scheme distributed among the drive groups of the drying part has 3...4 rotameter blocks in each group of the drying part. The arrangement schemes of rotameter blocks differ in different lengths of small diameter pipes (4-7 mm) of oil supply from rotameters to bearings. The effect of the length and diameter of the oil supply pipes from the rotameters to the bearings on the pump drive power has not been studied. The purpose of the work is to determine the effect of the length of a small diameter pipe from rotameters to bearings on the pump drive power with a compact and distributed among the drive groups of the drying part of the rotameter block layout schemes. A method has been developed and the following technological calculations of oil circulation systems have been performed: flow rate, velocity, kinematic viscosity, dynamic viscosity. Hydraulic calculation of power losses on different sections of small diameter pipes according to the variants of the layout schemes of rotameter blocks is performed. A method has been developed and technological calculations of circulating lubrication systems have been performed. The characteristics of the circulation systems in terms of oil consumption, speed, kinematic and dynamic viscosity of the oil are substantiated. It was found that the reduction in the power loss of the pump drive when the rotameter blocks are arranged in groups along the drive of the drying part is 0.225 kW, and the daily energy consumption is reduced by 5.4 kWh compared to the compact rotameter layout.

1. Chemical production machines and apparatuses / edited by V.N. Sokolov. L.: Mechanical Engineering, 1982. 384 p. (In Russ.)

2. Kugushev I.D., Terentyev O.A., Kurov V.S., etc. Machines for the production of paper and cardboard. St. Petersburg: Polytechnic Publishing House. un-ta, 2017. 646 p. (In Russ.)

3. Perel L.Ya., Filatov A.A. Rolling bearings: Calculation, design and maintenance of supports: Handbook. M.: Mechanical Engineering, 1992. 608 p. (In Russ.)

4. Sivakov V.P., Vurasko A.V., Isaeva K.S. Temperature diagnostics of bearings of drying cylinders of a cardboard-making machine. Young scientists in solving urgent problems of science: collection of materials of the All-Russian Scientific and Practical Conference of students, postgraduates and young scientists (with international participation) / under the general editorship of Yu.Yu. Loginov; SibGU named after M.F. Reshetnev. Krasnoyarsk, 2022, pp. 185-202. (In Russ.)

5. Sivakov V.P., Vurasko A.V., Isakov S.N., Isaeva K.S. Justification of energy saving in the drying section during the modernization of circulating greasing of bearings. Izvestia Sankt-Peterburgskoj Lesotehniceskoj Akademii, 2023, iss. 243, pp. 269-283 (In Russ.)

6. Sivakov V.P., Isaeva K.S. Temperature diagnostics of circulating lubrication of bearings of drying cylinders. Scientific creativity of youth to the forest complex of Russia: materials of the XIX All-Russian. (national) scientific-technical conf. of students and postgraduates / Ministry of Science and Higher Education of the Russian Federation. Yekaterinburg, 2023, pp. 576-580. (In Russ.)

7. Fedulov A.A., Spiridonova V.A., Nekrasov N.N., Bulganina M.Yu. Operating conditions for lubrication of bearing supports. URL: https://study.urfu.ru/Aid/viewMeta/13907 (In Russ.)