There are three main types of bearings: ball bearings, hydraulic bearings, and sleeve bearings.

Sleeve Bearing:

A sleeve bearing is constructed from porous metal, which can absorb and retain lubricating oil. The oil-filled space between the blade shaft and the sleeve helps reduce drag. Typically, sleeve bearings have a lifespan of 8,000 to 10,000 hours and are best suited for fans operating at medium or low speeds.

Advantages:

• Cost-effective
• Quiet operation
• Suitable for intermittent use

Disadvantages:

• High wear rate
• Shorter service life

Ball Bearing:

The ball bearing features rolling friction with metal balls, a small contact surface, and a low friction coefficient. This design reduces friction between bearing surfaces, improving its overall lifespan. Additionally, as there is no oil leakage, it is ideal for products that operate at various angles and directions.

Advantages: Long lifespan, suitable for high-speed fans.

Disadvantages: Higher cost, increased noise due to the rolling of metal balls.

Hydraulic Bearing

The hydraulic bearing offers a larger oil storage capacity compared to the sleeve bearing, featuring a unique loop-type oil supply circuit. Its completely sealed bottom contributes to a longer lifespan than that of a sleeve bearing. This type is ideal for high, medium, and low-speed fans, with an average lifespan ranging from 40,000 to 50,000 hours.

Advantages: Lower noise levels, longer lifespan than sleeve bearings.

Disadvantages: Higher cost compared to sleeve bearings

轴承主要有三种类型：滚珠轴承、液压轴承和滑动轴承。

滑动轴承：

滑动轴承由多孔金属制成，能够吸收和保持润滑油。叶片轴与轴承套之间的油膜有助于减少摩擦阻力。通常，滑动轴承的使用寿命为8000至10000小时，最适合中低速风扇。

优点：

• 成本低廉
• 操作安静
• 适合间歇性使用

缺点：

• 磨损较快
• 使用寿命较短

滚珠轴承：

滚珠轴承采用金属球进行滚动摩擦，接触面积小，摩擦系数低。这种设计减少了轴承表面之间的摩擦，提高了整体寿命。此外，由于没有油泄漏，它非常适合在不同角度和方向下工作的产品。

优点：

• 使用寿命长，适合高速风扇

缺点：

• 成本较高，金属球滚动时产生较大的噪音

液压轴承：

液压轴承相比滑动轴承具有更大的油储量，采用独特的环路型供油回路。其完全密封的底部使其使用寿命比滑动轴承更长。这种类型非常适合高速、中速和低速风扇，平均使用寿命为40,000至50,000小时。

优点：

• 噪音较低
• 使用寿命长于滑动轴承

缺点：

• 成本较高，较滑动轴承昂贵