The Improvement of the Device for Determining the Thickness of Lubricating Films During Materials Testing Gears

• Main Author: Юрій Михайлович Гузенко
• Format: Article
• Language: English
• Published: Igor Sikorsky Kyiv Polytechnic Institute 2018-11-01
• Series: Технологія і техніка друкарства
• Subjects: пристрій; товщина; змащувальна плівка; випробування матеріалів; зубчаста передача; роликовий зразок; вольтметр; жорстка струмопровідна пластина; трипозиційний перемикач; кутова швидкість; падіння електричної напруги; мастильний матеріал
• Online Access: http://ttdruk.vpi.kpi.ua/article/view/156463
• ISSN: 2077-7264; 2414-9977

The article discusses the improvement of the device, which contains serially connected with the roller samples ammeter, rheostat, battery and switch, as well as the hard conductive plate and connected in parallel with the voltmeter samples. The essence of the improvement is solved using the three-position switch connected to center terminal of the movable jumper with a rigid conductive plate, and the extreme terminals on both sides of the middle neutral terminal with separate samples. This simplifies the design of the device without using the two additional voltmeters, provides for the determination of total thickness and boundary lubricating oil films separate the oil film thickness between samples, and the total thickness of boundary films on their surfaces and the thickness of the boundary film on the working surface of each sample. The total thickness of the oil and boundary lubricating films is determined by the difference of fall of the electrical voltage measured before and after 50–60 minutes after feeding in the contact samples of the lubricant. Separately thickness of the oil film is determined by the difference of fall of the electrical voltage measured before and at the beginning of flow between the surfaces of the samples of the lubricant, and the total thickness of boundary lubricating films is determined by the difference of the drop of the electric voltage measured at the initial time and after 50–60 minutes after its submission. The thickness of the boundary lubricant film on the working surface of each sample is determined by a voltage drop between them separately and a rigid conductive plate.