Tecumseh Refrigeration Compressor
Posted by okmarts carl on January 29th, 2021
1. Lubricating oil function Lubricating oil is a liquid lubricant used on various types of machinery to reduce friction and protect machinery and processed parts. It mainly plays the role of lubrication, cooling, rust prevention, cleaning, sealing and buffering. Lubricating oil accounts for 85% of all lubricating materials, and there are many types and brands. Now the world's annual consumption is about 38 million tons. The general requirements for lubricants are: (1) Anti-friction and anti-wear, reduce frictional resistance to save energy, reduce wear to extend mechanical life, and improve economic efficiency; (2) Cooling requires that frictional heat be discharged from the machine at any time; (3) (4) Anti-corrosion and anti-rust, requiring protection of the friction surface from oil deterioration or external corrosion; (5) Cleaning and washing, requiring the friction area to be cleaned and removed; (6) ) Stress dispersion buffering, dispersing load and mitigating impact and shock absorption; (7) Kinetic energy transmission, hydraulic system, remote control motor and friction stepless speed change.LG Compressor.
2. Lubricating oil composition Lubricating oil generally consists of two parts: base oil and additives. Base oil is the main component of lubricating oil and determines the basic properties of lubricating oil. Additives can make up for and improve the performance of base oils and give some new properties. It is an important part of lubricating oil. 1. Lubricating oil base oil Lubricating oil base oil is mainly divided into two categories: mineral base oil and synthetic base oil. Mineral base oils are widely used and used in large amounts (about 95% or more). However, in some applications, products formulated with synthetic base oils must be used, which has led to rapid development of synthetic base oils. Mineral oil base oil is refined from crude oil. The main production processes of lubricating base oil include: atmospheric and vacuum distillation, solvent deasphalting, solvent refining, solvent dewaxing, clay or hydrogenation supplement refining. In 1995, my country's current lubricant base oil standards were revised, mainly the classification method was revised, and two types of special base oil standards, low condensation and deep refined, were added. In the production of mineral lubricants, the most important thing is to select the best crude oil. The chemical composition of mineral base oils includes high boiling point, high molecular weight hydrocarbons and non-hydrocarbon mixtures. Its composition is generally alkane (straight chain, branched chain, multi-branched chain), cycloalkane (monocyclic, bicyclic, polycyclic), aromatic hydrocarbon (monocyclic aromatic hydrocarbon, polycyclic aromatic hydrocarbon), cycloalkyl aromatic hydrocarbon and oxygen-containing, nitrogen-containing , Sulfur-containing organic compounds and non-hydrocarbon compounds such as gums and asphaltenes.
3. Additives Additives are the essence of modern high-grade lubricants. tecumseh refrigeration compressor Correct selection and reasonable addition can improve their physical and chemical properties, impart new special properties to the lubricant, or enhance some of its original properties to meet higher requirements. According to the required quality and performance of lubricants, careful selection of additives, careful balance, and reasonable deployment are the key to ensuring the quality of lubricants. Commonly used additives are: viscosity index improvers, pour point depressants, antioxidants, detergents, dispersants, friction reducers, oily agents, extreme pressure agents, antifoaming agents, metal deactivators, emulsifiers, corrosion inhibitors, Rust agent, demulsifier. Third, the basic performance of lubricating grease Lubricating oil is a technology-intensive product, a complex mixture of hydrocarbons, and its real performance is the comprehensive effect of complex physical or chemical changes. The basic properties of lubricants include general physical and chemical properties, special physical and chemical properties and simulated bench tests. General physical and chemical properties Each type of lubricating grease has its common physical and chemical properties to show the inherent quality of the product. For lubricants, these general physical and chemical properties are as follows: (1) Appearance (chromaticity) The color of the oil can often reflect its degree of refinement and stability. For base oils, generally, the higher the degree of refining, the cleaner the hydrocarbon oxides and sulfides are removed, and the lighter the color. However, even if the refining conditions are the same, the color and transparency of base oils produced from crude oils of different oil sources and bases may be different. For new finished lubricants, due to the use of additives, color has lost its original meaning as an index for judging the degree of refinement of the base oil. (2) Density Density is the simplest and most commonly used physical performance index for lubricants. The density of lubricating oil increases with the increase in the amount of carbon, oxygen, and sulfur in its composition. Therefore, at the same viscosity or the same relative molecular mass, the lubricating oil contains more aromatic hydrocarbons, and contains more gums and asphaltenes. The density is the highest, the one with more cycloalkanes is in the middle, and the one with more alkanes is the smallest. (3) Viscosity Viscosity reflects the internal friction of oil, and is an indicator of oil properties and fluidity. Without adding any functional additives, the higher the viscosity, the higher the oil film strength and the worse the fluidity. (4) Viscosity index Viscosity index indicates the degree of oil viscosity change with temperature. The higher the viscosity index, the less the oil viscosity is affected by temperature, the better its viscosity-temperature performance, and vice versa. (5) Flash point Flash point is an indicator of oil vaporization. The lighter the distillate of the oil, the greater the evaporation and the lower its flash point. Conversely, the heavier the oil fraction, the less evaporative, and the higher its flash point. At the same time, the flash point is an indicator of the fire hazard of petroleum products. The hazard level of oil products is divided according to the flash point. The flash point is flammable below 45℃, and flammable above 45℃. It is strictly forbidden to heat the oil to its flash point temperature during the storage and transportation of the oil. . In the case of the same viscosity, the higher the flash point, the better. Therefore, the user should choose according to the operating temperature and working conditions of the lubricant when choosing the lubricant. It is generally believed that the flash point is 20-30℃ higher than the operating temperature, and it can be used safely.(6) Freezing point and pour point Freezing point refers to the highest temperature at which the oil product stops flowing under specified cooling conditions. The solidification of oil is very different from the solidification of pure compounds. There is no clear solidification temperature for oil products.1. Lubricating oil function Lubricating oil is a liquid lubricant used on various types of machinery to reduce friction and protect machinery and processed parts. It mainly plays the role of lubrication, cooling, rust prevention, cleaning, sealing and buffering. Lubricating oil accounts for 85% of all lubricating materials, and there are many types and brands. Now the world's annual consumption is about 38 million tons. The general requirements for lubricants are: (1) Anti-friction and anti-wear, reduce frictional resistance to save energy, reduce wear to extend mechanical life, and improve economic efficiency; (2) Cooling requires that frictional heat be discharged from the machine at any time; (3) (4) Anti-corrosion and anti-rust, requiring protection of the friction surface from oil deterioration or external corrosion; (5) Cleaning and washing, requiring the friction area to be cleaned and removed; (6) ) Stress dispersion buffering, dispersing load and mitigating impact and shock absorption; (7) Kinetic energy transmission, hydraulic system, remote control motor and friction stepless speed change.
