Paint knowledge | home decoration oil knowledge: the most comprehensive introduction

Core tip: oil industry is a very common project in decoration, and it is also one of the most important processes in decoration Therefore, in the industry, there is even the theory of "three parts of wood and seven parts of paint" Next, let's take a look at the construction of home decoration oil workers and the knowledge of home decoration oil! 1 The performance of oil and the use of agricultural machinery in the operation, oil costs account for one third of the total cost At the same time, the correct use of oil can prolong the service life of the machine, reduce the cost of repair, and improve the production efficiency Oil is mainly a compound composed of carbon and hydrogen Petroleum products are refined according to the different boiling points of various compounds Shenyang steel structure fireproof coating construction expert punde Building Fire Engineering Co., Ltd Recommended introduction: since its establishment, Shenyang punde Construction Fire Engineering Co., Ltd has cultivated a group of professional construction teams with excellent equipment, rich experience and serious responsibility with advanced and scientific management methods and strict engineering quality assurance and after-sales service system It has undertaken a number of fire system installation projects, which has been praised by customers Every idea and special requirement of you will be fully considered by us and fully realized in the construction technology, which will become the cornerstone of our successful long-term development We are looking forward to your invitation, to provide you with quality services and high-quality technical support! All construction coatings have passed ISO9001 Paint Home News: oil industry is a very common project in decoration, but also one of the most important processes in decoration, so in the industry there is even a "three wood seven paint" theory Next, let's take a look at the construction of home decoration oil workers and the knowledge of home decoration oil! 1 The performance of oil and the use of agricultural machinery in the operation, oil costs account for one third of the total cost At the same time, the correct use of oil can prolong the service life of the machine, reduce the cost of repair, and improve the production efficiency Oil is mainly a compound composed of carbon and hydrogen Petroleum products are refined according to the boiling point of various compounds Gasoline, diesel and lubricating oil can be extracted by distillation according to different temperature range 2 Several kinds of commonly used oils in agricultural machinery (1) several performance indexes of gasoline must be understood when using Such as octane number, distillation range, saturated vapor pressure, etc ① Octane number is a measure of gasoline antiknock performance The higher octane number, the better antiknock performance In order to improve the octane number of gasoline Lead can be used as catalyst to add gasoline ② Distillation range refers to the boiling point of oil at a specified temperature The percentage of evaporation components in a certain temperature range is an index to evaluate the evaporation performance of oil If the 50% distillate temperature of the oil is low, it means that the oil has good evaporation If the 90% distillate temperature of the oil is low, the heavy fraction content is small, which can reduce the carbon deposition during combustion ③ Saturated vapor pressure is one of the indispensable indexes for measuring the evaporation performance of gasoline Generally, the gasoline with high evaporation performance has strong evaporation, but if it is too large, it is easy to form gas resistance and block the oil inlet pipe Therefore, it is stipulated that the vapor pressure of gasoline shall not be greater than 500mm Hg, then we will call the vapor pressure with high evaporation and not easy to form gas resistance as full vapor pressure (2) Diesel oil is the main grain of agricultural power machinery The following performance indexes must be understood when using it Viscosity It refers to the index of diesel's consistency and fluidity under normal temperature High viscosity, difficult flow, poor atomization quality, uneven mixing with air, bad combustion, black smoke; low viscosity, poor sealing of column ring, easy leakage, no oil film formation, easy wear of parts ② The freezing point is the temperature at which the fuel loses its fluidity When the temperature drops to the temperature at which the diesel loses its fluidity and solidifies, it is called the freezing point In order to make the engine run normally at low temperature, it is required that the diesel has a lower freezing point The freezing point is defined as the brand of diesel oil in China ③ Distillation range is one of the indexes to determine the evaporation performance of diesel It is usually expressed by the volume percentage of distillate under the specified temperature or the temperature under the volume percentage of distillate For diesel, because the short-term evaporation of diesel combustion is not good enough for the incomplete evaporation and combustion, the light diesel with low distillation range is used in high-speed diesel engine, and the heavy diesel is used in low-speed diesel engine ④ Cetane number is an important index to evaluate the roughness of diesel fuel during combustion The higher the cetane number is, the lower the natural ignition temperature is, and the easier the ignition is, but the cetane number should not be too high When it is greater than 65, the engine will emit black smoke and the fuel consumption will increase Therefore, the cetane number of diesel oil is generally between 40 and 60 ⑤ Flash point heating oil under specified conditions When its vapor is mixed with air, it will flash when it contacts the flame The temperature of the oil is called the flash point The flash point indicates the stability of oil at high temperature In addition, diesel oil has corrosiveness, coking and gelling properties Only when the performance index of diesel is known can the brand of diesel be selected correctly The brand of diesel oil is indicated by freezing point At present, there are No.0, No.10, No.20, No.35 diesel oil and No.20 agricultural oil in China Their freezing points are respectively 0 ℃, 10 ℃, 20 ℃, 35 ℃ and + 20 ℃, which are selected according to the local climatic conditions (3) Lubricating oil lubricating oil is the main oil used to reduce the wear and friction heat of the parts in the machine Modern lubricating oil also has the functions of cleaning, dispersion, oxidation resistance, etc According to different uses, it can be divided into steam engine oil, diesel engine oil and gear oil Some related parameters are described below ① Viscosity of lubricating oil It is used to indicate the difficulty of oil flow, which is directly related to the fluidity of lubricating oil and the thickness of oil film formed on the two friction surfaces The lubricating oil with high viscosity can not flow to the friction surface of the mating parts with small clearance and can not play a lubricating role But it can bear the load of larger pressure, and it is not easy to extrude from the friction surface, and maintain a certain thickness of oil film ② Freezing point of lubricating oil It means the temperature at which the oil loses its fluidity For the lubricating oil, when the weather is cold, the oil condensation makes the performance of the lubricating oil significantly worse Therefore, the machinery working at low temperature should choose the lubricating oil with low freezing point ③ Planktonic It is an index of inhibiting the formation of glue film and precipitation The lubricating oil with good floating property can make the oxide suspend in the oil and not deposit on the surface of metal parts, so as to avoid the formation of colloidal film ④ Corrosiveness The oxidation of acid, alkali medium or engine oil in lubricating oil will produce organic acid, which will have chemical effect on the metal surface, cause the change of metal composition and property, and damage the metal The effect that causes the change of metal composition and property is called corrosiveness The brand of steam engine oil is classified according to 100 ℃ kinematic viscosity It has 6, 10, 15, 6 low condensing oil and 8 low condensing oil The higher the brand, the higher the viscosity Diesel engine oil is divided into 8, 11, 14, 16, 20, 11 low oil, 1L heavy oil and 14 heavy oil according to 100 ℃ kinematic viscosity The higher the brand is, the higher the viscosity is The selection of diesel engine oil depends on the alloy material of crankshaft bearing bush of diesel engine If it is Babbitt alloy (tin base copper alloy), it can be used as steam engine oil In case of lead bronze alloy, cadmium nickel alloy, diesel engine oil shall be used Gear oil can be divided into gear oil and hyperbolic gear oil according to its application According to 100 ℃ kinematic viscosity, gear oil is divided into 20, 30 and general gear oil; hyperbolic gear oil is divided into 22 and 28 According to the different production process, there is another synthesis of 13 hyperbolic gear oil All kinds of hyperbolic gear oil are added with anti-wear additives It has good anti-wear performance Gear oil without additives cannot be used instead (4) Grease grease, commonly known as butter, is made of lubricating oil and thickener According to the different thickeners, grease can be divided into three types: calcium based grease, sodium based grease and calcium sodium based grease Under normal temperature, it is in the form of oil paste, with strong pressure resistance and buffering, and is not easy to lose It has good sealing and viscosity temperature, and is suitable for lubricating parts with difficult sealing, heavy load, high temperature and long time without replacement It is necessary to know the penetration, dropping point, colloidal safety and other indexes of lubricating oil when using At present, there are five brands of calcium based grease produced in China: ZG-1, ZG-2, ZG-3, zg-4, zg-5 "Z" for "grease", "g" for "calcium", l2345 for penetration series, indicating the consistency of grease At present, there are three brands of sodium based lubricating grease produced in China: zn-1h, zn-2h and zn-3h, "n" refers to "sodium", others are the same as above The grades of L, 2 and grease are distinguished according to the penetration The smaller the penetration is, the higher the grade is, the greater the consistency is, and the harder the grease is Home of coatings is specialized in coatings, diatom mud, paint coating, coating technology, fire retardant coating news and coating, diatom mud, paint coating, coating technology, fire retardant coating decoration knowledge and decoration renderings,