UBC Bearing Company: Wind Turbine Bearing Application Analysis

Green, clean energy requires advanced product support. UBC is closely following the development trend of wind power generation and is committed to the development and manufacture of bearings for wind turbines. It has developed yaw bearings, blade (pitch) bearings, spindle bearings and gearbox bearings for 600kW to 2.0MW units. Manufacturing capacity, can provide customers with a series of bearings for wind turbines.

Key supporting bearings for wind turbines, including:

Yaw system bearing

Pitch system bearing

Spindle bearing

Other system bearings (generator bearings and gear bearings)

Yaw system bearing: The yaw mechanism installed in the wind turbine cabin base assembly is used to accurately adjust the windward angle of the wind turbine and conduct lightning to the ground, carrying the full weight of the main drive system of the wind turbine (radial load axial direction) Load and overturning moment). It requires good sealing performance, high reliability, flexible operation and smoothness, and surface anti-corrosion life of more than 20 years. This type of bearing generally uses extra large four-point contact or crossed cylindrical roller slewing bearings.

Pitch system bearing: A sub-slurry system assembly located in the blade for adjusting the windward direction of the blade, mainly bearing radial load, axial load and overturning moment. The bearing is required to have good sealing performance, high reliability, surface anti-corrosion, flexible operation, and a service life of more than 20 years. Class bearings generally use four-turn contact or double volleyball extra large slewing bearings.

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Structure and application of stamped outer ring roller clutch

The drawn outer ring roller clutch is a one-way clutch that includes a thin wall, a stamped outer ring with a series of ramps on the inner diameter, a plastic cage, a spring and a needle roller. It can transmit torque in one direction and is radially compact. Roller clutches may or may not have bearing assemblies.

The drawn outer ring roller clutch has a very precise indexing, as each needle is held by a single spring, thus ensuring continuous contact between the shaft, the needle and the clamping surface. Due to its small mass, the inertia of the clamping element is very low, allowing for high indexing frequencies. And the idling friction torque is low.

Drawn cup roller clutches can be used in a variety of applications, such as indexing elements, return clutches or overrunning clutches. The drawn outer ring roller clutch properly performs the override or action function.

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Detecting the quality of INA bearing lubricants from the noise used in lubrication

The three simplest detection methods for lubricating oil are: oil spot method, color discrimination method and honing method.
Oil spot method:
The oil to be inspected is evenly mixed and dropped on a white paper (preferably a filter paper) to form oil spots, and the oil spots gradually diffuse from the center outward for about 2 to 3 hours to form three concentric rings. The state of the oil can be discerned based on the color, width and shape of the three areas.
Color discrimination method:
Normal is brown and blue black. If it is milky yellow, it indicates that diesel oil or water is added to the oil and should be replaced in time. If it is dark black, it indicates that the oil has deteriorated and must be replaced in time.
Honing method:
Remove a little oil from the low shell of the oil, apply it on your fingers, and rub it with your fingers and thumb. If you feel that there is impurities in the oil or that it is not sticky like water, or even hairy or sour, the oil has deteriorated. If you can see a small shiny metal grinding on your finger after honing, it means that the engine has a serious wear part, and it also means that the oil must be replaced immediately.
1. Low temperature high speed bearing grease
At present, the equipment using INA bearings is becoming more and more refined, and the grease used for bearings must have the following properties:
(1) It has the same operating life as the bearing, prolongs the maintenance cycle, shortens downtime and improves labor productivity.
(2) Under the high speed of dn>5×105, it is necessary to ensure that the motor temperature rises low and does not lick oil, thus reducing power consumption and protecting the motor.
(3) The impurity content is controlled under certain standards to minimize the pollution of equipment noise to the environment.
(4) Guarantee the flexibility of starting and running the bearing under ultra-low temperature working conditions to ensure the minimum output power.

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Simple troubleshooting tips for the abnormal temperature of the Endian bearing vibration

In the process of using the Entien bearing, there are often customers who reflect the abnormal temperature of the bearing vibration. According to the technical interpretation of the bearing group, the following factors are caused: the temperature of the general bearing rises as the speed of the bearing increases. And the temperature reached a stable level after 1-2 hours of stable operation. There are many main factors determining the temperature of the bearing, such as speed, lubricating oil, load, foreign matter intrusion and the like. If the above situation must be stopped, take the necessary inspection measures.
Customers are advised to monitor the operating temperature of the Endian bearing at any time using a thermal sensor. Long-term continuous rotation of the bearing at temperatures above 125 °C will reduce bearing life. Causes of high temperature bearings include: insufficient lubrication or excessive lubrication, lubricants. It contains impurities, the load is too large, the K bearing is damaged, the gap is insufficient, and so on. If it is not discovered and processed in time, the bearing will be scrapped. Therefore, it is necessary to continuously monitor the bearing temperature, whether it is measuring the bearing itself or other important parts. If the operating conditions are the same, any temperature change can indicate that a fault has occurred.
If the bearing produces abnormal vibration during operation, it is easy to cause damage. Specifically, it includes damage such as peeling damage, indentation damage, crack damage, and abnormal wear. Therefore, the vibration can be measured by the bearing vibration measuring device. The measured value is different depending on the operating conditions of the Entalion bearing or the mounting position of the sensor. We recommend that the customer record the value of the normal operation of the machine in advance to facilitate comparison. analysis.
The first type: observation method
If the bearing is well lubricated and properly blocks debris and moisture, it means that the oil seal should be free of wear. However, it is best to visually inspect the bearing and periodically check the oil seal when opening the bearing housing. Check the condition of the oil seal near the bearing. To ensure that they are sufficient to prevent hot liquids or corrosive liquids or gases from penetrating into the bearing along the shaft. The protective ring and the labyrinth oil seal should be greased to ensure maximum protection. The oil seal should be replaced as soon as possible if it is worn.

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