润滑系统是向机器或机组的摩擦点供送润滑剂的系统，包括用以输送、分配、调节、冷却和净化润滑剂以及其压力,流量和温度等参数和故障的指求、报警和监控的整套装置。在润滑工作中，根据各种设备的实际工况，合理选择和设计其润滑方法、润滑系统和装置，对保证设备具有良好的润滑状况和工作性能以及保持较长的使用寿命，具有十分重要的意义。 一般而言，机械设备的润滑系统应满足以下要求：
The lubrication system is a system that supplies lubricant to the friction point of the machine or unit, including a complete set of devices for conveying, distributing, regulating, cooling and purifying lubricant, as well as the indication, alarm and monitoring of its pressure, flow, temperature and other parameters and faults. In the lubrication work, it is of great significance to reasonably select and design the lubrication method, lubrication system and device according to the actual working conditions of various equipment to ensure that the equipment has good lubrication condition and working performance and maintain a long service life. In general, the lubrication system of mechanical equipment shall meet the following requirements:
1) 保证均匀、边续地对各润滑点供应一定压力的润滑剂，油量充足，并可按需要调节。
1) Ensure that the lubricant of certain pressure is supplied to each lubricating point evenly and continuously, and the oil quantity is sufficient, and can be adjusted as required.
2)工作可靠性高。采用有效的密封和过滤装置，保持润滑剂的清洁，防止外界环境中灰尘、水分进入系统，并防止因泄漏而污染环境。
2) High working reliability. Effective sealing and filtering devices are used to keep the lubricant clean, prevent dust and moisture from entering the system in the external environment, and prevent environmental pollution due to leakage.
3)结构简单，尽可能标准化，便于维修及高速调整，便于检查及更换润滑剂，起始投资及维修费用低。
3) The structure is simple, standardized as far as possible, convenient for maintenance and high-speed adjustment, convenient for inspection and replacement of lubricants, and low initial investment and maintenance costs.

4)带有工作参数的指示、报警保护及工况监测装置，能及时发现润滑故障。
4) With the indication, alarm protection and working condition monitoring device of working parameters, it can timely find lubrication faults.
5)当润滑系统需要保证合适的润滑剂工作温度时，可加装冷却及预热装置以及热交换器。
5) When the lubrication system needs to ensure the proper operating temperature of lubricant, cooling and preheating devices and heat exchangers can be installed.
表明润滑油的多方面作用
It shows the multiple functions of lubricating oil
有的则是润滑与其他性能并重，如液压油和液力传动油，润滑与传递动力同样重要。其他大部分润滑油主要是降低摩擦和减少磨损，同时还有如下作用：
Some pay equal attention to lubrication and other performance, such as hydraulic oil and hydraulic transmission oil, lubrication and power transmission are equally important. Most other lubricating oils mainly reduce friction and wear, and also have the following functions:
冷却 密封、防锈防腐、绝缘、动能传递、减震、清晰。
Cooling and sealing, rust prevention and corrosion prevention, insulation, kinetic energy transmission, shock absorption and clarity.
之所以表明润滑油的多方面作用，是因为近年来一些不实广告中夸大了润滑油的减摩作用，而忽略了其他作用，典型的是所谓"无油行车"宣传者把他的油放在汽车中运转一会后把油放光，在无油的情况下行驶数十，汽车运转正常，表明他的油的剩余油膜功能强大。
The reason why lubricating oil has multiple functions is that in recent years, some false advertisements have exaggerated the antifriction effect of lubricating oil, while ignoring other functions. Typically, the so-called "oil-free driving" propagandist put his oil in the car for a while and then let the oil out. The car runs normally for tens of kilometers without oil, indicating that the remaining oil film function of his oil is strong.
但我们应看到在没有润滑油后，对设备的冷却功能、冲洗功能及减振动功能都没有了，尤其是连杆轴承的表面是易熔合金减摩涂层，温度高到一定程度就熔化，某院校已在其发动机台式实验中，采用数种广告中的"神奇油"进行验证，结果表明无油运转的时间长短并不决定于这种油的品种，而决定于发动机的连杆轴瓦的减磨合金的熔点高低。
However, we should see that after the absence of lubricating oil, the cooling function, flushing function and vibration reduction function of the equipment are gone, especially the surface of the connecting rod bearing is a fusible alloy antifriction coating, which melts when the temperature is high to a certain degree. A certain university has used several kinds of "magic oil" in the advertisement to verify in its engine desktop experiment, and the result shows that the length of oil-free operation does not depend on the type of this oil, It depends on the melting point of the anti-wear alloy of the connecting rod bearing bush of the engine.