Dynamics of Synchronous Hydromechanical Drive in Mobile Machine

Some manufacturing processes are accompanied by significant noise and vibration. Sources of intense noise and vibration are machines and mechanisms with unbalanced rotating masses, as well as technological installations and apparatuses in which the movement of gases and liquids occurs at high speeds and has a pulsating character. The modern development of technology, equipping enterprises with powerful and fast-moving machines and mechanisms leads to the fact that people are constantly exposed to noise of increasing intensity. Increasing noise and vibration in the workplace has a harmful effect on the human body. As a result of prolonged exposure to noise, the normal activity of the cardiovascular and nervous systems, digestive and hematopoietic organs is disturbed, and professional hearing loss develops, the progression of which can lead to complete hearing loss.Among industrial hazards, noise and vibration occupy one of the leading places among production hazards. The harmful effects of increased noise levels on the human body are well khown, therefore, the relevance of this problem is obvious.

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“…Technological measures to reduce the noise level in the source include: reducing the amplitude of oscillations, speed, etc [1,3,5,7,9].…”

Section: Methodsmentioning

confidence: 99%

Means and methods of noise protection to reduce the risk of cardiovascular disease in workers

et al. 2020

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“…Noise reduction is achieved by creating new designs of low-noise automatic devices, for example, placing gears in oil baths, closing them with soundproof casings, replacing the power spring of the short circuit in the cam mechanisms of the drive slider by springs with kinematic closing and cams designed according to the law motion, providing a sinusoidal symmetric law of change of the accelerator of the pusher. These measures reduced noise by 5-9 dB [1,3,5,7,9].…”

Section: Methodsmentioning

confidence: 99%

“…In the latter case, there are changes in cardiac activity, general excitement, or, conversely, inhibition, fatigue, the appearance of pain, a feeling of shaking of the internal organs, nausea. In these cases, vibrations also affect the osteoarticular apparatus, muscles, peripheral circulation, vision, hearing [1,3,5,7,9]. Local vibrations cause spasms of blood vessels that develop from the terminal phalanges of the fingers, spreading to the entire hand, forearm, and cover the vessels of the heart.…”

Section: Introductionmentioning

confidence: 99%

Theoretical studies on the calculation of the noise of impact equipment in blacksmith shops

et al. 2020

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Most types of forging equipment relate to impact machines, during the operation of which impulse noise occurs, the levels of which at workplaces, in most cases, exceed the maximum permissible values and relate to those factors, the significance of which in some cases is greater than dustiness, high temperature, manipulation of heated workpieces. Therefore, the problem of reducing vibration and noise in the forge shops is extremely relevant and has great scientific and socio-economic significance. To solve the problem of noise reduction in forge shops, various options for reducing the noise activity of equipment have been developed/ It is possible to most effectively reduce noise by changing the material and shapes of the beds, noise-attenuating casings, oil baths for gears.

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“…Aerodynamic noise occurs when the clutch and brake are turned on when the scale is blown off from the finished products of the tool and from the work of the fan for blowing jobs ( fig.1). To reduce mechanical noise, it is necessary to reduce the force and speed of impact of parts, replace impact interaction by shockless, reduce the number of revolutions of rotating masses, increase the accuracy of manufacturing parts and press assemblies, apply lubrication to mutually moving parts, make one or both of the colliding parts from a material with a lower elastic modulus, to cover colliding elements with non-metallic materials, to ensure careful static and dynamic balancing of moving parts [1,3,5]. The strength and speed of impact of parts can be reduced by installing knee-lever or articulated drive mechanisms that provide the differential speed of the press slide on different parts of the working stroke.…”

Section: Methodsmentioning

confidence: 99%

Soundproofing presses by placing its nodes in a soundproof casing, including drive components

2020

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Noise is one of the most unfavorable environmental factors in production facilities, for which it is most difficult to achieve compliance with sanitary standards. Prolonged exposure to intense vibrations and noise leads to noise and vibration diseases. The effect of noise on the human body is not limited to exposure to the organ of hearing. Irritation by noise is transmitted to the central and autonomic nervous systems, through them acts on the internal organs, leading to significant changes in the functional state of the organism. With pulsed and irregular noise, the degree of impact of noise on the body of workers increases. Most types of forging equipment relate to impact machines, during the operation of which impulse noise occurs, the levels of which at workplaces, in most cases, exceed the maximum permissible values and relate to those factors, the significance of which in some cases is greater than dustiness, high temperature, manipulation of heated workpieces. Therefore, the problem of reducing vibration and noise in the forge shops is extremely relevant and has great scientific and socio-economic significance. To solve the problem of noise reduction in forge shops, various options for reducing the noise activity of equipment have been developed/ It is possible to most effectively reduce noise by changing the material and shapes of the beds, noise-attenuating casings, oil baths for gears.

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Dynamics of Synchronous Hydromechanical Drive in Mobile Machine

Cited by 23 publications

References 1 publication

Means and methods of noise protection to reduce the risk of cardiovascular disease in workers

Means and methods of noise protection to reduce the risk of cardiovascular disease in workers

Theoretical studies on the calculation of the noise of impact equipment in blacksmith shops

Soundproofing presses by placing its nodes in a soundproof casing, including drive components

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