CS217147B1 - Component Vibration Lubricant - Google Patents

Abstract

The invention relates to a lubricant against vibration wear of machine parts based on higher fatty acids with alkali metals and caustic earth metals, which contains an addition of 20.0 to 48.0 wt. % of alkane-cyclane oils with a boiling point above 280 °C and 26.0 to 69.0 wt. % of caustic earth oxides and their hydrates. Furthermore, this lubricant may contain 0.1 to 1.6 wt. % of condensation products of triethanolamine with a higher fatty acid with a number of carbon atoms in the chain up to CgQ.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The invention relates to a lubricant against vibration wear of components.

As is well known, various types of friction occur on machine parts when they come into contact with each other. One of these friction is vibration friction, often also called vibration corrosion.

This friction is characterized as friction free from external thermal influences, causing corrosion on metal surfaces. When two micro-vertices of the surface of the parts come together, the impact energy is converted into heat, which, for example, causes the formation of many oxides in ferrous metals. Repeating these reactions damages the surface of the metal parts very quickly. This type of damage is characterized by the fact that surface damage increases linearly by the number of vibrations, but at a lower frequency at a given number of vibrations, metal surface damage is greater than at a higher frequency.

As the pressure increases, the intensity of the surface attack increases without affecting the surface condition of the friction surfaces. The increasing hardness of the component surface decreases the intensity of the attack, while the increasing the amplitude of the vibrations increases the attack. Many of the features of this type of component damage indicate that this is significantly different from other types of friction.

Due to vibration corrosion, two fundamental defects occur, namely the disproportionately rapid wear of the contacting friction surfaces or their mutual fixation up to the strength range of their micro-welds.

Commonly used machine parts lubricants do not have the ability to keep two metal surfaces in contact, they do not have the ability to absorb and damp the oscillating effects of high pressures, they also have a lower fixation ability on the contact surfaces and in most cases they do not have sufficient thermal stability and chemically reactive metal surface.

These disadvantages are overcome by a higher efficiency lubricating anti-vibration lubricant comprising higher alkali metal salts and alkaline earth metal salts, further comprising 20-48% by weight. % of alkane-cyclanic oils boiling above 280 ° C and 26 to 69 wt. corrosive earth oxides and their hydrates. Further features of the lubricant according to the invention result from exemplary lubricant compositions.

Example 1

38.1 wt.

2.2 wt. 1.6 wt.

58.1% wt.

alkanic-cyclanic oil boiling above 280 ° C, eg petrolatum medical salts of higher fatty acids with alkali metals eg sodium stearate condensation product of triethanolamine and oleic acid calcium oxide

This lubricant significantly reduces the occurrence of vibration corrosion and its undesirable effects on the contacting surfaces of machine parts with calcium oxide particles. Due to the low content of the soap-forming component (sodium stearate), this lubricant is suitable for smaller interactions between components at higher pressures.

In addition to this function, I have an anticorrosive inhibitory effect on the metal surfaces of the components.

Example 2 wt. an alkane-cyclanic oil boiling above 280 ° C, e.g. salts of higher fatty acids with corrosive earth metals, calcium stearate wt. % condensation product of triethanolamine and oleic acid hydrated calcium oxide

2.7147

The lubricant significantly reduces the occurrence of vibration corrosion on contacting surfaces, which is largely due to the high reach of hydrated calcium oxide. The higher calcium stearate content and the very good sliding properties of the hydrated calcium oxide make it advantageous to use this lubricant for greater movement of the components at higher pressures.

Example 3 wt. an alkane-cyclanic oil boiling above 280 ° C, e.g. salts of higher fatty acids with corrosive earth metals such as calcium palmitate

0.1 wt. condensation product of triethanolamine and stearic acid

26.9 wt. hydrated calcium oxide

This lubricant has good sliding properties as previous lubricants. They can also advantageously be used for greater relative movement of the parts at lower pressures.

Salts of higher fatty acids with alkali and caustic earth metals - they form the lubricating base of the fat with the oil. These are actually soaps of said metals, which by dissolving, respectively. by mixing with oil they form a gel-like structure of the actual fat. The addition of these soaps results in improved sliding properties in the resulting fat and a more adhering lubricating film which exhibits a higher resistance to failure. These properties result from the characteristic structure of soap molecules that orient between the two contacting surfaces in the fat.

Alcanic-cyclanic oil forms the liquid grease base of the fat. It is a mixture of saturated hydrocarbons boiling above 280 ° C. It is a colorless to slightly yellowish, oily, low-viscous liquid.

Chemical saturation of bonds results in chemical stability, resistance to atmospheric influences, oxidation stability, low reactivity. These properties are manifested in the lubricant especially by its stability during the process of origin and effect of vibrational corrosion, ie. oscillating motion even at high temperatures and pressures. The low viscosity guarantees good absorbency of the oil into the inorganic fillers, which again increases the desired properties of the resulting lubricant.

Oxides and their hydrated forms of corrosive earth elements - form a solid grease base for fat. Oxides crystallize mostly in the cubic crystal system, their hydrate forms in the hexagonal system. They have a high melting point.

In the lubricant, they form a separating film between two metal contact surfaces, thus preventing their direct contact and the possibility of surface interaction and damage. They themselves have good sliding properties, which is due to the crystalline structure. It can withstand high temperatures without chemical-physical changes. They withstand high pressures without chemical changes and are incorporated into the surface of a metallic material in a very thin film. In the case of HjO ⁺ and GH ions, they slightly alkalize the environment, thus reducing the possibility of attacking the metal surface by atmospheric corrosion.

Condensation products of triethanolamines with higher fatty acids - with the number of carbon atoms in the chain C to Cjq, eg oleic acid, palmitic acid, stearic acid. In said fat they have the function of a corrosion inhibitor, they improve the sliding properties and adhesion of the lubricating film. The infibution effect is caused by the presence of a free electron pair on the nitrogen atom.

♦

The configuration of the molecules of these substances undermines their ability to orient themselves well between the two contacting surfaces in the lubricant, thereby improving the adhesion of the lubricant, respectively. a lubricating film on the metal surface.

Claims (2)

THE OBJECT OF THE INVENTION An anti-vibration grease component comprising 2.0 to 25.0 wt. salts of higher fatty acids with alkali metals and caustic earth metals, characterized in that it contains longer than 20.0 to 48.0 wt. % of alkane-cyclanic oils having a boiling point above 280 ° C and 26.0 to 69.0 wt. corrosive earth oxides and their hydrates. Lubricant according to claim 1, characterized in that it contains from 0.1 to 1.6% by weight. condensation products of triethanolamine with a higher fatty acid having a carbon number of up to _C20 .