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Automatic lubrication system

About: Automatic lubrication system is a(n) research topic. Over the lifetime, 461 publication(s) have been published within this topic receiving 3143 citation(s).
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Journal ArticleDOI
Erwin V. Zaretsky1Institutions (1)
Abstract: The requirement for long-term, reliable operation of aerospace mechanisms has, with a few exceptions, pushed the state of the art in tribology. Space mission life requirements in the early 1960s were generally 6 months to a year. The proposed U.S. space station schedule to be launched in the 1990s must be continuously usable for 10 to 20 years. Liquid lubrication systems are generally used for mission life requirements longer than a year. Although most spacecraft or satellites have reached their required lifetimes without a lubrication-related failure, the application of liquid lubricants in the space environment presents unique challenges. The state of the art of liquid lubrication in space as well as the problems and their solutions are reviewed.

96 citations

Journal ArticleDOI
Abstract: Manufacturing industries have been pressured to use less power and reduce pollution by the development of power-efficient and pollution-preventing policies from the government. However, quality and cost are of main concern in this agenda. In machining, the key solution for this issue is by increasing the effectiveness of existing lubrication systems as this reduces the power required to overcome the friction component in machining processes for less fuel consumption and pollution. In machining processes, in particular, improved lubrication systems will increase batch production rates with better product quality. Introducing nanolubrication reduces power consumption as the rolling action of a billion units of nanoparticles in the tool chip interface decreases the cutting forces significantly. Additionally, using nanolubrication in machining minimizes the consumption of the lubrication oil, which decreases pollution. Detailed analysis and implementation of nanolubrication in machining process with the proper parameter setup are mandatory to ensure the efficiency of implementing nanolubrication. In this research, SiO2 nanoparticles are mixed with ordinary mineral oil having 0.2% weight concentration. A proper sonification method is used to mix and suspend the particles thoroughly and efficiently. The results show a reduction in the coefficient of friction in the tool/chip interface. Hence, the cutting force and working power are reduced considerably compared with conventional lubrication systems. Consequently, considerable power savings, less oil consumption, and less pollution are achieved.

89 citations

13 May 2003-
Abstract: A lubrication system for an engine including a sump for lubricant, a main pump operable to pump lubricant to first lubrication positions within the engine, and an auxiliary lubricant pump also operable to pump lubricant to second lubrication positions within the engine and wherein the auxiliary pump is an electrically driven pump which is controlled by a system controller the output of the auxiliary pump being controlled according to engine operating conditions, the main pump in use, pumping lubricant to the first lubrication positions within the engine along a main lubricant feed line, and the auxiliary pump when operated pumping lubricant to the second lubrication positions within the engine along an auxiliary feed line, and wherein the main and auxiliary feed lines, are connected via a communication passage which includes a closeable communication valve, the communication valve when closed preventing the flow of lubricant from the auxiliary feed line to the first lubrication positions, and when open permitting the flow of lubricant from the auxiliary feed line to the first lubrication positions.

79 citations

Journal ArticleDOI
28 Apr 2017-Applied Sciences
Abstract: This review aims at introducing an engineering field of lubrication to researchers who are not familiar with tribology, thereby emphasizing the importance of lubricant chemistry in applied science. It provides initial guidance regarding additive chemistry in lubrication systems for researchers with different backgrounds. The readers will be introduced to molecular sciences underlying lubrication engineering. Currently, lubricant chemistry, especially “additive technology”, looks like a very complicated field. It seems that scientific information is not always shared by researchers. The cause of this is that lubrication engineering is based on empirical methods and focuses on market requirements. In this regard, engineering knowhow is held by individuals and is not being disclosed to scientific communities. Under these circumstances, a bird’s-eye view of lubricant chemistry in scientific words is necessary. The novelty of this review is to concisely explain the whole picture of additive technology in chemical terms. The roles and functions of additives as the leading actors in lubrication systems are highlighted within the scope of molecular science. First, I give an overview of the fundamental lubrication model and the role of lubricants in machine operations. The existing additives are categorized by the role and work mechanism in lubrication system. Examples of additives are shown with representative molecular structure. The second half of this review explains the scientific background of the lubrication engineering. It includes interactions of different components in lubrication systems. Finally, this review predicts the technical trends in lubricant chemistry and requirements in molecular science. This review does not aim to be a comprehensive chart or present manufacturing knowhow in lubrication engineering. References were carefully selected and cited to extract “the most common opinion” in lubricant chemistry and therefore many engineering articles were omitted for conciseness.

69 citations

15 Oct 1993-
Abstract: Large work machines typically include an automatic lubrication system for lubricating critical areas during operation. In such systems it is advantageous to provide an efficient and flexible controller having substantial diagnostic capabilities. The subject inventions provides a sensor for determining the level of an operational parameter, a device for calculating a time interval being dependent on a previous lubrication event and the operational parameter, a device for producing a lubrication signal in response to the time interval reaching a predetermined interval constant, and a lubrication control for activating a lubrication system.

51 citations

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Topic's top 5 most impactful authors

Patrick Hendrick

7 papers, 26 citations

Dinh Quang Truong

5 papers, 22 citations

Kyoung Kwan Ahn

5 papers, 22 citations

Jae-Shin Lee

5 papers, 22 citations

Johan Steimes

4 papers, 23 citations