Precision Analysis of Geometric Parameters for Rotating Machines during Cold Alignment

Mogilny, S.; Sholomitskii, A. A.

doi:10.1016/j.proeng.2017.10.702

Cited by 7 publications

(5 citation statements)

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“…When the rotating kiln is cold, it is possible to get better results. [5] Laser scanning is a common way to measure complicated things. Using laser scanning technology, a large number of 3D data points are collected, and then this information is used to make a detailed map of the surface of the building.…”

Section: Rotary Kiln Controlsmentioning

confidence: 99%

Investigation of Inner Lining Loss and Correlation with Steel Structure Ovality in Rotary Kilns

Zahradník,

Vynikal,

Pavelka

2023

Preprint

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The purpose of the investigation was to determine the relationship between rotary kiln liner loss and steel structure ovality. As measurement apparatus, a terrestrial laser scanner was used. The interior and exterior of the rotary kiln were measured. The primary focus object was inner-lining loss and the geometric characteristics of cylindrical shells. The research uncovered significant disparities in inner lining loss between sections. A correlation was found between ovality and elimination of inner lining. Due to the hypothesis of constant inner linig loss from the middle of the rotary kiln, the investigation found that the loss of brick lining was less than the value reported from the boreholes. The study offers significant information on maintenance and repair strategies for rotary kilns, which have the potential to increase their efficiency and useful life.

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Section: Rotary Kiln Controlsmentioning

confidence: 99%

Investigation of Inner Lining Loss and Correlation with Steel Structure Ovality in Rotary Kilns

Zahradník,

Vynikal,

Pavelka

2023

Preprint

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“…This study introduces the cold alignment technique based on reflectionless laser measurements by total stations (Mogilny and Sholomitskii 2017).…”

Section: Introductionmentioning

confidence: 99%

New method for measuring and analyzing the deformability and eccentricity of the ferrule kilns

S Amraoui,

I Janati,

Moujibi

2024

Eng. Res. Express

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In the industrial sector, particularly in the cement industry, the key aspect of the production process is the production of clinker through the use of a rotary kiln. Due to the large volume and high temperature involved, these complex structures are subjected to stress and deformation during operation. Therefore, it is crucial to conduct regular control measurements to verify the compliance of the basic geometric parameters. In this article, we examine the literature on various control techniques, with a particular focus on the misalignment of the rotating axis of the ferrule. To measure the rotating axis and ovality of the rotary kiln cylinder, a new data processing method was developed and subsequently implemented. This method was experimentally demonstrated by creating a prototype to validate it, and the results obtained by the prototype were then compared to those obtained by the coordinate measuring machine. The results indicate that the proposed method is effective for determining the real axis of the rotary kiln (eccentricity) and the ovality of the shell structure. With this purpose, the article proposes a new solution for processing spatial data using a mathematical method based on the geometric parameters of the shell structure. This study can be used to develop tools for controlling rotary kilns, particularly in the data collection process.

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“…The RK measurement methodology consists of the reference system's design and realization (local horizontal and vertical coordinate system) [11]. Next is the measurement of the spatial relationships of the longitudinal axis of the kiln and axes of rollers (measurements of position, height, additional, and special measurements) and eventually of determination of the rectifying parameters [12].…”

Section: Introductionmentioning

confidence: 99%

“…The height measurement aims to determine the absolute or relative heights of the radial rollers' axes and the height of the carrier tire of RK shell. Precision analysis of geometric parameters for the RK's alignment in the cold state is described in [12].…”

Section: Introductionmentioning

confidence: 99%

Analytical Determination of Geometric Parameters of the Rotary Kiln by Novel Approach of TLS Point Cloud Segmentation

et al. 2020

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This research focused on determining a rotary kiln’s geometric parameters in a non-traditional geodetic way—by deriving them from a survey realized by a terrestrial laser scanner (TLS). The point cloud obtained by TLS measurement was processed to derive the longitudinal axis of the RK. Subsequently, the carrier tires’ geometric parameters and shell of the RK during the shutdown were derived. Manual point cloud selection (segmentation) is the base method for removing unnecessary points. This method is slow but precise and controllable. The proposed analytical solution is based on calculating the distance from each point to the RK’s nominal axis (local radius). Iteration using a histogram function was repeatedly applied to detect points with the same or similar radiuses. The most numerous intervals of points were selected and stored in separate files. In the comparison, we present the conformity of analytically and manually obtained files and derived geometric values of the RK-radiuses’ spatial parameters and coordinates of the carrier tires’ centers. The horizontal (X and Y directions) and vertical (Z-direction) of root–mean–square deviation (RMSD) values are up to 2 mm. RMSD of the fitting of cylinders is also up to 2 mm. The center of the carrier tires defines the longitudinal axis of the RK. Analytical segmentation of the points was repeated on the remaining point cloud for the selection of the points on the outer shell of the RK. Deformation analysis of the shell of the RK was performed using a cylinder with a nominal radius. Manually and analytically processed point clouds were investigated and mutually compared. The calculated RMSD value is up to 2 mm. Parallel cuts situated perpendicularly to the axis of the RK were created. Analysis of ovality (flattening) of the shell was performed. Additionally, we also present the effect of gradually decreasing density (number) of points on the carrier tires for their center derivation.

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Precision Analysis of Geometric Parameters for Rotating Machines during Cold Alignment

Cited by 7 publications

References 0 publications

Investigation of Inner Lining Loss and Correlation with Steel Structure Ovality in Rotary Kilns

Investigation of Inner Lining Loss and Correlation with Steel Structure Ovality in Rotary Kilns

New method for measuring and analyzing the deformability and eccentricity of the ferrule kilns

Analytical Determination of Geometric Parameters of the Rotary Kiln by Novel Approach of TLS Point Cloud Segmentation

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