Reducing Ground Ring Damage in Wind Power Turbines

在整个美国，对风能的需求正在迅速增长。尽管它提供了明确的好处，但它也经历了常见的技术问题，其中包括风力涡轮机发电机中的地环的电侵蚀。摩根高级材料的电气碳业务乔治·芬利（George Finley）的风段经理探讨了挑战及其成本，并概述了一个开创性的解决方案。欧洲杯足球竞彩

虽然它对能源市场是相对较新的，但随着全球对可持续，清洁和高效能源的需求的增长，风能正在迅速增加。根据全球风能委员会的数据，在2002年至2007年之间，该行业每年增长25％。现在认为，到2024年，全球风能市场将超过1700亿美元的收入（全球市场见解）。

The Global Wind Energy Market industry is set for even more unprecedented growth and development. Offshore wind turbines especially, are becoming more and more powerful every day. GE has already announced that in 2021 it will deploy the 12-megawatt Haliade-X, the world’s most powerful offshore wind turbine. This technological marvel is set to produce 45 percent more electricity than the biggest turbine in 2018’s market.

尽管如此，虽然海上风力涡轮机正在窃取所有标题，但陆上风力涡轮机的尺寸产生了最大的电能。陆上风力涡轮机将保持2兆瓦和3兆瓦的能力，这意味着音量和正常运行时间至关重要。然而，由于地面环槽的现象，陆上风电场运营商面临着一场战斗，以使涡轮机保持运行。

Designed to help divert powerful shaft currents (which may reach 60 amps/1,200 volts or even higher), ground rings are a feature of wind turbines which have the core function of stopping damage to bearings and other equipment.

接地环通过通过刷子的利用来传递电流，该刷子通常通过“恒定力弹簧”保持在与环接触的情况下。只要存在触点，电流就会有效地转移。但是，这种接触很难验证，部分原因是由于轴和组件未对准的整体磨损。因此，刷子也变得未对准，并可能与振动滑环失去接触。

A variation of even one or two degrees can make a difference. When this occurs, the air gap between the ring and the brush causes a high inductance of the circuit, and arcing electrical currents subsequently eat away at the metal, causing grooves in the slip ring (and also impacting on bearings occasionally).

As the grooving develops and the metal carries on eroding, the gap between the ring and the holder grows, which results in even more instability. This effect is commonly called ‘footprinting’, ‘ghosting’ or ‘photo imaging.’

Electrically Explosive

除了降低地面环的效力外，弧的结果可能会更具破坏性。随着金属逐渐侵蚀，它变成砂纸，细颗粒本身会“粉尘”刷子。欧洲杯猜球平台该灰尘带有导电材料（碳和铜），这将导致电流在相位或相处之间流动，从而导致破坏性的闪存和电爆炸的风险。

Although this does not normally put people at risk, it can result in damage which can be catastrophic to the turbine. The immediate solution is for the ring to be taken away for repair, re-machined in-situ or for a replacement ring to be installed. Inevitably, the net result is downtime and expense.

Bearings are around $5,000-$10,000 each and a replacement slip ring can cost up to $5,000. Plus, expensive electrical equipment and circuit boards can also be damaged when brushes lose contact with the ground ring. Each day of downtime usually represents an estimated $1,500 of lost revenue.

This is an important problem, and manufacturers have set about achieving a solution. The answer has been the introduction of a brush holder which incorporates two brushes, covering some 40° (1/9^th) of the ring.

提议是，如果其中一个刷子失去了接触，则另一个刷子可以作为故障保护。但是，实际上，刷子的位置太近，遇到了“弹跳”效果，这会使两者同时失去联系。同样，刷子架本身离环太远，不可调节，可能导致不稳定。这是一个改进，但潜在的问题仍然存在。

A New Dawn for Wind Power

摩根的电气碳业务开发了开创性的创新 - 替换地面刷架系统的完全可调节的下降，同时寻找对这种持续挑战的确切答案。这个新的发明电台不是双刷，而是在同一安装空间内的四个，这有助于轻松升级。只需取消启动并带走旧持有者，可以将新的持有人螺栓固定在他们的位置上。

刷子由铜石墨材料的航空航天级制成。该材料经过特殊处理，以承受低湿度和高湿度环境，并在滑动环上形成低摩擦膜或古铜色。

然后，这种低摩擦膜随后有助于减少摩擦颤动（刷子的弹跳），从而减少灰尘并延长刷子的寿命。这种专有处理使刷子更容易清洁，因为它不是粘性树脂，因此收集灰尘的可能性较小。为了提高稳定性和接触并增加刷子之间的距离，碳支架也完全可调 - 通常，它们的覆盖率是OEM设计的三倍。

Other features include quick disconnect brush terminals for easy maintenance/replacement and a full scope of options to meet all of the needs of the machine. The unit cost of a Morgan brush holder is remarkably lower than for a replacement ring or bearing, even more so when other factors like downtime are taken into account.

Morgan Advanced Materials’WTG1 brush holderis a perfect example of how, as the demand for renewable energy keeps gaining traction, it is crucial that technology develops alongside it.

通过航空航天材料加工的精密性，可以最大程度地减少地面环损坏，从而使危欧洲杯足球竞彩险电流和电压尖峰的安全可靠耗散。这延长了设备和轴承的寿命，因此可以保护您的投资 - 2020欧洲杯下注官网毕竟是可持续能源的可持续解决方案。

This information has been sourced, reviewed and adapted from materials provided by Morgan Advanced Materials.

For more information on this source please visitMorgan Advanced Materials。