Spremljanje in preprečevanje nevarnosti tvorjenja usedlin in lakastih oblog

Kambič, Milan (author)

Lakaste obloge (angl. varnish) predstavljajo enega ključnih, a pogosto spregledanih vzrokov za zmanjšano zanesljivost sodobnih hidravličnih in mazalnih sistemov. Njihova problematika se ne kaže v nenadnih okvarah, temveč v postopnem poslabševanju delovanja, ki lahko vodi v zatikanje ventilov, zmanjšano učinkovitost regulacijskih elementov in nepredvidene izpade opreme. Nastanek lakastih oblog je povezan s kompleksnimi mehanizmi kemijske in fizikalne degradacije maziva, pri čemer klasični para- metri analize olja pogosto ne zaznajo zgodnjih faz tega pojava. Prispevek obravnava mehanizme nastajanja lakastih oblog, omejitve rutinske analize olja ter sodobne diagnostične pristope za spremljanje potenciala nastanka laka s poudarkom na preventivnem upravljanju mazalnih sistemov.

• Language: Slovenian
• Keywords: lakaste obloge, oksidacija, MPC, hidravlični sistem, maziva
• Work type: Article
• Typology: 1.04 - Professional Article
• Organization: FS - Faculty of Mechanical Engineering
• Publication status: Published
• Publication version: Version of Record
• Year: 2026
• Number of pages: Str. 116-118
• Numbering: Letn. 32, št. 2
• PID: 20.500.12556/RUL-186385
• UDC: 621.22:621.8
• ISSN on article: 1318-7279
• COBISS.SI-ID: 277723139
• Publication date in RUL: 31.08.2026

Record is a part of a journal

• Title: Ventil : revija za fluidno tehniko in avtomatizacijo
• Shortened title: Ventil
• Publisher: Univerza v Ljubljani, Fakulteta za strojništvo
• ISSN: 1318-7279
• COBISS.SI-ID: 54233856

Licences

• License: CC BY 4.0, Creative Commons Attribution 4.0 International
• Link: http://creativecommons.org/licenses/by/4.0/
• Description: This is the standard Creative Commons license that gives others maximum freedom to do what they want with the work as long as they credit the author.

Secondary language

• Language: English
• Title: Monitoring and prevention of the risk of deposit and varnish formation

Abstract

Varnish deposits represent one of the key, yet often overlooked, causes of reduced reliability in modern hydraulic and lubrication systems. Their impact does not manifest as sudden failures, but rather as a gradual degradation of performance, which can lead to valve sticking, reduced efficiency of control components, and unplanned equipment downtime. The formation of varnish is associated with complex mechanisms of chemical and physical lubricant degradation, while conventional oil analysis parameters often fail to detect the early stages of this phenomenon. This paper discusses the mechanisms of varnish formation, the limitations of routine oil analysis, and modern diagnostic approaches for monitoring varnish potential, with an emphasis on preventive management of lubrication systems.

• Keywords: varnish deposits, oxidation, MPC, hydraulic system, lubricants