Elephant Fluid Power Co., Ltd.
Elephant Fluid Power Co., Ltd.

Understand the Advantages of Hydraulic Bearings and the Difference from Oil-impregnated Bearings

The hydraulic bearing is improved on the basis of the oil-impregnated bearing, so the hydraulic bearing is still essentially an oil-impregnated bearing. However, after this improvement, the hydraulic bearing has a larger oil storage space than the oil-impregnated bearing, and has a unique loop-back oil supply circuit. Its service life is greatly extended compared with ordinary oil-sealed bearings, and it inherits the advantages of oil-impregnated bearings - low operating noise.

Ⅰ. The advantages of hydraulic bearings

1. The hydraulic bearing improves the non-sealed design of the bottom of the traditional bearing, and seals the bottom of the bearing to form a closed oil-retaining design. This effectively prevents the volatilization of lubricating grease and dust from entering the inside of the bearing. As a result, bearing service life can be greatly extended.

2. Due to the non-sealed design of the bottom of traditional bearings, the lubricating oil cannot be stored too much. Hydraulic bearings use the characteristics of the closed bottom to design a large oil storage space, which can store a large amount of lubricating grease. This keeps the bearing in a lubricated state at all times, which greatly improves the stability of the hydraulic bearing.

3. The hydraulic bearing adopts special low-wear, high-temperature resistant grease. This grease has a low wear rate and is resistant to high temperatures. Even if the hydraulic bearing works continuously for a long time and is in a high temperature state, the grease in the hydraulic bearing will not volatilize, ensuring a good lubrication effect on the bearing.

4. The hydraulic bearing also uses a permeable oil circuit design, which makes the bearing and the oil storage tank communicate with each other, which is conducive to the smooth entry of the lubricating grease in the oil storage tank into the bearing. At the same time, it also uses powder metallurgy to make bearings with special metals. There are tiny voids on the bearing, soak the bearing in special lubricating grease to fill the void with grease. During the operation of the hydraulic bearing, grease continuously overflows to lubricate the bearing. With the design of the permeable oil circuit, the bearing and the oil storage tank are connected as a whole, and the lubricating grease can flow freely, truly achieving unlimited self-overflow lubrication.

Ⅱ. The difference between oil bearing and hydraulic bearing

Oil-impregnated bearings, usually clasps are sleeved on the copper core, and grease is stored in the middle. This type of fan has relatively low noise in the early stage, low cost, but short life, usually around 20,000 hours. In the late stage of application, due to the consumption of lubricating oil, the noise will gradually increase and the speed will also decrease.

Hydraulic bearings are improved on the basis of oil-impregnated bearings. Hydraulic bearings have a larger oil storage space than oil-impregnated bearings, and have a unique loop-back oil supply circuit. The working noise of the hydraulic bearing fan has been significantly reduced, and the application time is also very long, which can reach 40,000 hours. The essence of hydraulic bearing is still an oil bearing.