【 Weak current College 】 lubricant basics---Power By 【 China power house network 】

1. What is the oil?

A: lubrication with grease reducing (or control) two friction surface friction or other forms of surface damage, reducing friction. Because two different surface contact, mutual friction, and have the following consequences: wear, noise, high temperature. If we strike with the lubricant, can reduce the appearance of the above situations. Lubricant oil is one of these, it can make parts form a film on the surface, and is between two mutual contact between the parts. So that both activities easier, smooth, efficient and significantly reduce the friction caused by damaged; therefore, if you want the engine to achieve best results, select the proper lubrication is very important.

Second, the primary function of lubricant?

1. control of friction: friction rub surface lubricant between the join to form the friction and lubrication film, reduce the direct contact between the metal surface, thereby reducing the coefficient of friction, reducing the friction drag reduction in power consumption.

2, reduce wear and tear: friction between a certain strength of lubrication film that can support the load, avoid or reduce the direct contact with the metal surface, which reduces the contact surface of plastic deformation, melting welding, cut and then bonded and various degrees of adhesive wear.

3. cooling: lubricants to lower coefficient of friction, reducing friction heat generated.

4. seal isolation: lubricant especially grease coverage from the friction surface or other metal surfaces, you can isolate the moisture, moisture and other harmful media contact with metal, thus reducing wear and corrosion, Rust prevention, protection of the metal surface.

5, reducing vibration: lubricants can impact vibration of mechanical energy into hydraulic energy, to reduce the noise impact, absorption.

Third, various types of lubricating oil additive what uses?

(1) clean dispersant role solubilization, dispersion, acid neutralization, adsorption effect of four.

(2) antioxidant and rottenly additives are inhibiting oil oxidation process, blunt metal catalysis of the oxidation to extend oil use and protection of the purpose of the machine.

(3) the role of depressants is lowering the freezing point of petroleum products, oil products in temperature to maintain good liquidity and increase the performance of low temperature starting the engine.

(4) improver you can increase the viscosity of oil products, in particular to meet oil at low temperature and use of performance requirements.

(5) oily and antiwear additives can react with metal surface chemical reaction membrane to prevent generated metal wear, abrasion and welding.

(6) the role of the inhibitor is included in the metal surface layer of protection, the prevention of corrosion medium and the metal contacts, rust-inhibiting effect.

(7) antifoamer's main role is to inhibit the formation of foam in order to avoid formation of foam stability, it can be adsorbed on the bubble membrane, forming unstable membrane, so as to achieve the purpose of destroying foam.

(8) anti-emulsifier could change the oil/water interface tension so that the oil-water separation, improve the quality of the oil demulsibility.

4. What is the tipping point?

A: standard oil in terms of cooling, to continue to flow in the minimum temperature is called the pour point. Selection of lubricating oil is usually considered the pour point of lubricating oil, lubricating oil pour point should be better than the lowest using environment temperature low 5 to 10 degrees.

5. What is Flash?

Answer: the provisions of the conditions, heating oil, when the temperature reaches a certain temperature, the lubricating oil vapour and gas mixture of ambient air, as soon as you contact with the flame, the Flash fire phenomenon, the lowest temperature, known as the Flash fire in sparking points of lubricating oil. Selection of lubricating oil, according to the temperature of the lubricating oil used to consider shandiangao low, General flash point temperature than the use of 20 to 30 degrees to ensure safety and reduce volatilization.