Lifespan of insulation bearings of wind turbine generators

Wind turbine main bearing rating lives as determined

An exploratory case study was then undertaken to determine rating lives for two models of main bearing—240/630 and 230/600 bearings, which together approximately span the design space—in a 1.5 MW wind turbine. Rating life

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About Lifespan of insulation bearings of wind turbine generators

Abstract—Wind turbine generators are subjected to unusual environments and stresses. In this paper we will discuss several types of wind generator insulation failure mechanisms as well as forensic analysis results of several different manufacturers’ systems.

Abstract: The prediction of the remaining useful life (RUL) is central to prognostics and health management (PHM) of an asset. Bearing as a critical and fragile component plays a great influence on the health condition and RUL of wind turbines.

Using a nonlinear Wiener process and particle filtering combination, we describe a method in this study for estimating the RUL of WT generator bearings. The $3\sigma$ criterion is first utilized to recognize the initial degradation points of the bearings. Secondly, a degradation model employing the nonlinear Wiener process is established and .

In order to know about the real-time operating condition and the remaining life of the wind turbine bearings in time, a method of life prediction was proposed based on Wiener process. Firstly, the relationship model of bearing temperature parameters and speed parameters of wind turbine was established by using multiple linear regression .

Today, the cost reduction in wind power generation is the biggest key to boost the prevalence of the wind power generation. Rotor blades of wind turbine generators installed onshore are being upsized to be able to operate in weaker wind blowing areas, while higher power generating offshore turbines are being developed.

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6 FAQs about [Lifespan of insulation bearings of wind turbine generators]

Why does a wind turbine have a low life expectancy?

This variation is caused by the wind speed acting on the wind turbine. The later is dependent on the turbulence, storms, gusty conditions, the height from the ground and even a sudden wind loss. These can cause significant variability in bearings load and speed and a reduction in their expected life.

Do wind turbine gearboxes deteriorate under non-stationary conditions?

Since the gears are essential components in wind turbines gearboxes and are most vulnerable to damage, in future work, we will investigate the applicability of the proposed approach to track their degradation under non-stationary conditions and to perform their prognosis and RUL prediction.

How much power does a wind turbine generator have?

Currently, the mainstream model is between 1.5 and 2.3 MW (megawatts), which consists of a gearbox increasing speed by approximately 100-fold and an induction generator. The diameter of the blades is between 80 and 100 meters, and the tower height is around 100 meters. 3. Characteristics of Wind turbine generators

What type of bearings are used in wind turbine generators?

In recent years, wind turbine generators intend to consist of double row tapered roller bearings, which have excellent axial loading performance on the fixed side, and cylindrical roller bearings, which have excellent axial direction allowance on the free side.

Should wind turbine rotor blades be larger?

Rotor blades of wind turbine generators installed onshore are being upsized to be able to operate in weaker wind blowing areas, while higher power generating offshore turbines are being developed. As a result, rolling bearings installed into these turbines should be larger and more reliable. 1. Introduction

What type of gearbox does a wind turbine generator have?

The gearboxes consist of a carrier, planet gears, a ring gear, a low-speed shaft (sun gear) and parallel shafts. Most wind turbine generator on the market have a 1-stage planet gear and a 2-stage parallel shaft. Figure 7 gives an example of the configuration of a 2 MW gearbox.