DOI: https://doi.org/10.30838/J.BPSACEA.2312.170118.27.37

Improving safety in workplaces when operating the compressor units for the account of noise reduction and vibration

A. S. Belikov, A. V. Mamontov, V. A. Shalomov

Abstract


Purpose. Increase of safety at working places due to introduction in manufacture of author's methods and means of decrease in vibration and noise in the sources which are a part of compressor devices. Method. System analysis in the field of fundamental research of oscillatory processes, vibration and noise; application of standard and proposed calculation and experimental methods for studying oscillatory systems with unbalanced rotors of compressor units; mathematical modeling of processes. Results. The work of compressor plants is associated with increased levels of noise and vibration. These harmful production factors adversely affect the person and act on it both directly and indirectly. Without the timely use of preventive measures, the risks of the above hazards will increase dramatically. In the course of the study, it became apparent that methods and means of eliminating the causes of increased vibration and noise in compressor plants to date have not been fully understood. The main sources of increased mechanical noise and vibration at low frequencies are unbalanced rotors of compression blocks. Unbalanced rotors are the cause of increased vibration and mechanical noise. In all considered sources, the imbalance of the rotors is the cause of increased vibration and mechanical noise. The appearance of vibration in the rotation of an unbalanced rotor is due to the presence of vibration forces whose frequency coincides with the rotational frequency, and the module is proportional to the magnitude of imbalance (imbalance). The level of noise from the vibrating surface depends on its shape, area and vibration velocity. In general, the unbalance of a hard rotor has two components: static and momentary. Different methods are used to balance the rotors, the essence of which is to adjust the unbalanced masses. This can be achieved by removing or adding a certain mass in correction planes by drilling, staining, soldering, welding or gluing. The process of measuring and eliminating the disequilibrium of the rotors is called balancing. Currently, several types of balancing machines are used. The most common are resonant and after resonance balancing machines, on which the corresponding measuring methods (before resonance and after resonance) are realized. In operation of compressor plants, operational imbalances often arise due to the impact of an aggressive environment (dust, caustic substances and other factors). Both of the considered machine tools (the method) have drawbacks, which limit their efficiency and the possibility of using on repair sites of construction industry enterprises. These include the need for pre-setting the machine, limited accuracy of measurement at one start, the effect of external and internal interference on the measurement result. High speed and the presence of rotary rotor drives during the balancing process are the cause of a high risk of injury to people. Balancing rotors in specialized machine-building enterprises usually requires high financial and time costs. As a result, compressor installations are used for complete wear with increased noise and vibration. Currently developed and patented vibration methods and instruments for measuring the imbalance of rotors, based on measuring the frequency of free fading oscillations of the swivel frames. Different methods are used to balance the rotors, the essence of which is to adjust the unbalanced masses. This can be achieved by removing or adding a certain mass in correction planes by drilling, staining, soldering, welding or gluing. In operation of compressor plants, operational imbalances often arise due to the impact of an aggressive environment (dust, caustic substances and other factors). High speed and the presence of rotary rotor drives during the balancing process are the cause of a high risk of injury to people. The proposed methods and means can be implemented not only at the enterprises producing compressor plants, but also on repair sites of enterprises that operate compressor plants, for example, construction industry enterprises. Scientific novelty. It is the presentation of new methods and means of measuring imbalances, which, in the opinion of the authors of the article, are not inferior to the analogues in efficiency and are safer. Practical meaningfulness. It consists in the possibility of using the proposed methods and tools directly on the repair sites of the construction industry enterprises. This will reduce the time and financial costs of repairing compressor plants, thereby reducing noise and vibration during their operation. Ultimately, the introduction of the proposed methods and tools will increase the safety of the enterprises in the construction industry associated with the operation of compressor plants.

Keywords


compressor; rotor; noise; vibration; imbalance; pendulum frame; free oscillations

References


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Yudin E.Ya., Rassadina I. D. and Nikolskij V. N. Spravochnik proektirovschika. Zaschita ot shuma. [Handbook of the designer. Noise protection]. Moskva: Stroyizdat, 1974, 134 p. (in Russian).

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Mamontov A.V. Metody vibrodiagnostiki neuravnoveshennyx rotorov dlya snizheniya vibracii i shuma proizvodstvennogo oborudovaniya [Methods of vibrodiagnostics of unbalanced rotors for reducing vibration and noise in production equipment]. Radioelektronika i informatika [Radioelectronics and Informatics]. 2002, no. 3, pp. 68–70. (in Russian).


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