Working conditions on scraper and graders have not been studied sufficiently. In this regard, a study of the parameters of noise and vibration in the cabins during the operation of these machines was undertaken. In the cabins of the D-395, sound pressure levels did not exceed the remote control. In the cabins of the DM-144 auto graders, the noise exceeded the remote control at average frequencies by 1-2.5 dB, and on high-by 2-4 dB. On the floor of these graders, vibration with an amplitude of 0.097 mm and a frequency of 33-40 Hz was registered; The excess of vibration is very significant – 11-12 times.
During the work of the scraper of the CHTZ-100, the intensity of sound pressure ranged from 82 to 98 dB. On the seat during the idle, vibration was found with a frequency of 18 Hz, an amplitude of 120 mm and an acceleration of 151.6 cm/s2. When developing soil with a scraper D-357-P, the noise turned out to be 6-11 dB above the PDU.
To combat the influence of adverse meteorological conditions on ES-4/40 and SE-3 excavators, a device was proposed in the summer in the machine room of air shower, shielding walls, general exchange ventilation. During taping, air speed is 1 m/s, and the temperature is 22-25 ° C. It is advisable to thermal insulation of equipment and outer walls of the machine room. The light color of excavators should prevent their heating in the summer. In cold weather, excavators must have electric heating. For replaceable clothes in locker rooms, it is better to use metal cabinets for clothing from the Impulse plant.
During periodic medical examinations of excavators, since they experience increased noise and vibration, it is recommended to include neuropathologists and otorhinolaryngologists in medical commissions. Violation of the vestibular function and organic diseases of the nervous system should be considered as contraindications for hiring as excavators driver.