Conveyor speed

In conveyor technology, the conveying speed is the speed at which the conveyed goods are moved by the conveyor in the conveying direction. The conveying speed is one of the most important factors for the conveying process. The conveying speed is given in meters per second (m / s).

Continuous conveyor

Continuous conveyors run, depending on the conveying task, with a continuous conveying speed, with changing speed or in sync with production. Depending on the conveying task and the amount of conveyance to be achieved, different conveying means with type-specific conveying speeds are used. They always convey the goods in the same direction. Conveyor belts are operated at different conveyor speeds. Depending on the conveying task, the speed is usually between 0.9 and 6 m / s. When conveying piece goods and in flow production, speeds of up to a maximum of 2 m / s and below are used. Conveyor speeds of up to 1 m / s are used for heavily dusty goods such as flour or cement. There are also belts that are operated at a conveyor speed of 8 m / s. These are used in particular where large masses have to be removed. However, this speed is not the maximum conveying speed for belt conveyors. So there are so-called sling belts that are operated at up to 20 m / s. Due to their design, chain scraper conveyors can only be operated at a relatively low conveying speed. It is between 0.4 and 1.4 m / s. Even lower conveying speeds are achieved with vibrating chutes . With these conveying means, the conveying speed is between 0.13 and 0.2 m / s, depending on the material being conveyed. This is due to the type of back-and-forth movement that is typical for shaking slides.

Discontinuous conveyor

Discontinuous conveyors are, for example, cranes , shaft conveyor systems or elevators . With these conveyors, the conveying speed gradually increases from zero to the maximum value, this is then maintained over part of the conveying path, after which the conveying means is decelerated to zero. The mean conveyor speed, also known as the average speed, can be calculated from the length of the conveyor line and the time required for a conveyor train. This average speed can only be increased by increasing the maximum speed or by increasing the acceleration. However, increasing the maximum speed is not unlimited, because it is heavily dependent on the available length of the conveying path, in the case of shaft hoisting systems the depth . This is due to the fact that part of the depth has already been covered when accelerating up to maximum speed. Since part of the depth is also required for the deceleration, only the remaining part of the conveyor line remains for the maximum speed. In modern shaft hoisting systems, maximum speeds of up to 30 m / s have already been achieved, but such hoisting speeds are only economically justifiable at great depths and well-developed shafts . The start-up acceleration cannot be increased above 1 m / s ² either , since otherwise the traction sheave would lead to a rope slide . In addition, the torque of the hoisting machine is insufficient to reduce the acceleration period more. In order to be able to further increase the maximum speed with a given acceleration and deceleration, a longer conveyor line is required. However, since the conveyor line is specified, when the maximum speed is increased, a speed is reached at which it becomes uneconomical to drive it if the time gain is only minimal. It also comes at a certain speed to a significantly higher dynamic load of skips , cages , track slats and once Riche . This means that at depths of 1000 meters, an increase in the conveying speed to over 20 m / s would have major disadvantages for the conveyor system. In addition, an increase in the conveying speed by 25 percent from 20 m / s to 25 m / s would only result in an increase in conveying capacity of 10 percent. In elevator systems, the conveying speed is standardized and divided into so-called Renard rows. It is between 0.3 m / s and 8 m / s, depending on the conveyor line and elevator type.

Individual evidence

↑ ^a ^b ^c ^d ^e Walter Bischoff , Heinz Bramann, Westfälische Berggewerkschaftskasse Bochum: The small mining dictionary. 7th edition, Verlag Glückauf GmbH, Essen, 1988, ISBN 3-7739-0501-7 .
↑ Thomas Risch: Two-dimensional forms of movement in vibration conveyor technology. Approved dissertation at the Faculty of Mechanical Engineering of the University of Chemnitz, Chemnitz 2011, pp. 3, 6, 12–21.
↑ ^a ^b ^c Katrin Berger: Continuous conveyor. Master's thesis at the Institute for Applied Linguistics and Translatology at the University of Leipzig, Leipzig 2014, pp. 7–11, 25–28, 41–43, 57, 111.
↑ ^a ^b Heinz Pfeifer: Fundamentals of conveyor technology. 5th improved edition, Friedrich Vieweg & Sohn, Braunschweig 1989, ISBN 978-3-528-44061-9 , pp. 221-225, 248, 261-264, 292.
↑ ^a ^b ^c Heinrich Aumund, Fritz Mechtold: Lifting and conveying systems. A textbook for students and engineers, fourth revised and expanded edition, Springer Verlag, Berlin / Heidelberg 1958, pp. 56, 58, 64, 65, 98, 108, 109, 139–152.
↑ ^a ^b K.-H. Grote, J. Feldhusen (Ed.): Dubbel. Paperback for mechanical engineering, twenty-second revised and expanded edition, Springer Verlag, Berlin / Heidelberg 2007, ISBN 978-3-540-49714-1 , p. U 59.
↑ Georg von Hanffstengel: The promotion of bulk goods. Volume I, Springer-Verlag Berlin Heidelberg GmbH, Berlin Heidelberg 1908, pp. 200-215.
↑ ^a ^b Martin Scheffler (ed.), Klaus Feyrer, Karl Matthias: conveyors, hoists, elevators, industrial trucks. Friedrich Vieweg & Sohn Verlagsgesellschaft mbH, Wiesbaden 1998, ISBN 978-3-663-16319-0 , pp. 261-263.
↑ ^a ^b ^c ^d Kammerer-Charlottenburg: The technology of load handling then and now. A study of the development of lifting machines and their influence on economic life and cultural history, printing and publishing by R. Oldenbourg, Munich and Berlin 1907, pp. 58, 59.
↑ ^a ^b ^c ^d Fritz Schmidt: The basics of the conveyor machine system. Second increased and improved edition, Springer-Verlag Berlin Heidelberg GmbH, Berlin Heidelberg 1923, pp. 24-27.
↑ Carl Hellmut Fritzsche: Textbook of mining science with special consideration of hard coal mining. First volume, ninth completely revised edition, Springer Verlag, Berlin / Heidelberg 1955, pp. 442–443.
↑ P. Walter: Determination of the payload in the shaft conveyance, in particular the vessel conveyance. In: Glückauf, Berg- und Hüttenmännische magazine. Association for mining interests in the Oberbergamtsiertel Dortmund (Ed.), No. 16, 67th year, April 18, 1931, pp. 513-523.
^ EG Weyhausen, P. Mettgenberg: Calculation of electrical conveyor systems. Julius Springer's publishing house, Berlin 1920, pp. 1–18.
^ Carl Hellmut Fritzsche: Textbook of mining science. First volume, 10th edition, Springer Verlag, Berlin / Göttingen / Heidelberg 1961, pp. 468–470.
↑ Hartmut Arnold: Conveyor technology in hard coal mining underground. In: Commission of the European Communities (ed.): General Directorate Scientific and Technical Information and Information Management, Verlag Glückauf GmbH, Luxembourg 1978, ISBN 3-7739-0233-6 , p. 346.
↑ Liu Bin: Shaft conveyor systems, their design, construction and safety standards. Diploma thesis at the Chair for Materials Handling and Design at the Montan University Leoben, Leoben 2015, pp. 8–9.

Remarks

↑ The maximum speed at which a conveyor can be moved without it being driven over the end stop is the limit speed . (Source: Carl Hellmut Fritzsche: Textbook of Mining Studies. First volume, 10th edition.)

[Quelle_1-1] Walter Bischoff , Heinz Bramann, Westfälische Berggewerkschaftskasse Bochum: The small mining dictionary. 7th edition, Verlag Glückauf GmbH, Essen, 1988, ISBN 3-7739-0501-7 .

[Quelle_2-2] Thomas Risch: Two-dimensional forms of movement in vibration conveyor technology. Approved dissertation at the Faculty of Mechanical Engineering of the University of Chemnitz, Chemnitz 2011, pp. 3, 6, 12–21.

[Quelle_3-3] Katrin Berger: Continuous conveyor. Master's thesis at the Institute for Applied Linguistics and Translatology at the University of Leipzig, Leipzig 2014, pp. 7–11, 25–28, 41–43, 57, 111.

[Quelle_4-4] Heinz Pfeifer: Fundamentals of conveyor technology. 5th improved edition, Friedrich Vieweg & Sohn, Braunschweig 1989, ISBN 978-3-528-44061-9 , pp. 221-225, 248, 261-264, 292.

[Quelle_5-5] Heinrich Aumund, Fritz Mechtold: Lifting and conveying systems. A textbook for students and engineers, fourth revised and expanded edition, Springer Verlag, Berlin / Heidelberg 1958, pp. 56, 58, 64, 65, 98, 108, 109, 139–152.

[Quelle_6-6] K.-H. Grote, J. Feldhusen (Ed.): Dubbel. Paperback for mechanical engineering, twenty-second revised and expanded edition, Springer Verlag, Berlin / Heidelberg 2007, ISBN 978-3-540-49714-1 , p. U 59.

[Quelle_7-7] Georg von Hanffstengel: The promotion of bulk goods. Volume I, Springer-Verlag Berlin Heidelberg GmbH, Berlin Heidelberg 1908, pp. 200-215.

[Quelle_8-8] Martin Scheffler (ed.), Klaus Feyrer, Karl Matthias: conveyors, hoists, elevators, industrial trucks. Friedrich Vieweg & Sohn Verlagsgesellschaft mbH, Wiesbaden 1998, ISBN 978-3-663-16319-0 , pp. 261-263.

[Quelle_9-9] Kammerer-Charlottenburg: The technology of load handling then and now. A study of the development of lifting machines and their influence on economic life and cultural history, printing and publishing by R. Oldenbourg, Munich and Berlin 1907, pp. 58, 59.

[Quelle_10-10] Fritz Schmidt: The basics of the conveyor machine system. Second increased and improved edition, Springer-Verlag Berlin Heidelberg GmbH, Berlin Heidelberg 1923, pp. 24-27.

[Quelle_11-12] Carl Hellmut Fritzsche: Textbook of mining science with special consideration of hard coal mining. First volume, ninth completely revised edition, Springer Verlag, Berlin / Heidelberg 1955, pp. 442–443.

[Quelle_12-13] P. Walter: Determination of the payload in the shaft conveyance, in particular the vessel conveyance. In: Glückauf, Berg- und Hüttenmännische magazine. Association for mining interests in the Oberbergamtsiertel Dortmund (Ed.), No. 16, 67th year, April 18, 1931, pp. 513-523.

[Quelle_13-14] EG Weyhausen, P. Mettgenberg: Calculation of electrical conveyor systems. Julius Springer's publishing house, Berlin 1920, pp. 1–18.

[Quelle_16-15] Carl Hellmut Fritzsche: Textbook of mining science. First volume, 10th edition, Springer Verlag, Berlin / Göttingen / Heidelberg 1961, pp. 468–470.

[Quelle_14-16] Hartmut Arnold: Conveyor technology in hard coal mining underground. In: Commission of the European Communities (ed.): General Directorate Scientific and Technical Information and Information Management, Verlag Glückauf GmbH, Luxembourg 1978, ISBN 3-7739-0233-6 , p. 346.

[Quelle_15-17] Liu Bin: Shaft conveyor systems, their design, construction and safety standards. Diploma thesis at the Chair for Materials Handling and Design at the Montan University Leoben, Leoben 2015, pp. 8–9.

[Anm._Fritz.-11] The maximum speed at which a conveyor can be moved without it being driven over the end stop is the limit speed . (Source: Carl Hellmut Fritzsche: Textbook of Mining Studies. First volume, 10th edition.)