Gear lubrication is an important condition for ensuring the normal operation of gears and bearings

Lubrication method

Gear reducer, also known as gear reducer, refers to a device that reduces speed through traditional gear sets. As reduction is achieved through gear friction, regular lubrication is required to avoid equipment damage. The commonly used lubrication methods for gear reducers include pressure lubrication, splash lubrication, drip lubrication, jet lubrication, and oil ring lubrication. In addition to choosing the appropriate lubrication method, attention should also be paid to selecting the appropriate lubricating oil according to the working environment, load size, etc.

Pressure lubrication method

Add an oil pump to the engine and use the pressure of the pump to supply lubricating oil to each gear lubrication point. The pressure lubrication method belongs to forced lubrication, which relies on an oil pump to deliver lubricating oil to the friction pair at a certain pressure. Usually, a plunger type oil pump is used for lubrication, and the plunger pump is installed in the casing to supply oil through its reciprocating motion.

Splash lubrication method

Principle:

By relying on the rotation of gears, lubricating oil is brought from the oil pool into the clearance of the friction pair, forming automatic lubrication. When the gears rotate, the lubricating oil in the oil pool will splash up, causing the lubricating oil to spread onto components such as gears and bearings.

Features: It can ensure that the gears and bearings are fully in contact with lubricating oil, and the lubrication effect is good. Suitable for low-speed and heavy-duty gear reducers. Attention should be paid to the control of oil level height. If the oil level is too high, it will increase stirring loss and heat generation, while if the oil level is too low, sufficient lubrication cannot be guaranteed.

Drip lubrication method

Utilize the self weight of the lubricating oil to drop it drop by drop onto the friction pair.

Jet lubrication method

Directly pressurizing and spraying with an oil pump through a nozzle is suitable for closed gears with a circumferential velocity greater than 12-14 meters per second and low splash lubrication efficiency. Oil ring lubrication method is a lubrication method that uses a ring with a diameter larger than the shaft diameter to rotate together with the shaft, bringing the lubricating oil from the lower oil reservoir to the shaft neck.

About what lubricating oil to use

Types and specifications of reducers:

Different types and specifications of gear reducers may have different requirements for lubricating oil. For example, heavy-duty reducers require lubricating oil with high viscosity and extreme pressure performance, while light-duty reducers can use lubricating oil with low viscosity.

Work environment:

The temperature, humidity, dust and other factors in the working environment can also affect the selection of lubricating oil. In high-temperature environments, it is necessary to choose lubricating oil with good thermal stability; In humid environments, it is necessary to choose lubricating oil with good rust resistance and emulsion resistance.

Load and speed:

The higher the load and speed, the higher the requirements for the anti-wear and extreme pressure performance of the lubricating oil. Select the appropriate lubricant viscosity and performance grade based on the actual load and speed of the gearbox.

Costs and benefits:

The prices of different brands and types of lubricants vary greatly, and it is necessary to comprehensively consider the performance and price of lubricants and choose products with high cost-effectiveness. At the same time, the service life and oil change cycle of lubricating oil should be considered to reduce maintenance costs.