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國際:高效節能電機中的螺旋傘齒輪

2012-09-17 | 瀏覽量: 1294 买一套棋牌app需要多少
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买一套棋牌app需要多少 www.jbqtck.com.cn 高效節能電機,它可以是二到百分之八,效率比標準電機,欠其優異的性能,功能,新的技術和設計制造的改進。

汽車被發現在各種工業應用,日常工具,如風扇,鼓風機,泵供電。根據美國能源部的資料,在美國所有電能消耗的一半以上是由電動機。全國電氣制造商協會說,電動機系統占制造業用電量的70%,展示一個能量守恒和效率的^大機會。因此,在面對經濟的不確定性和不斷增長的可持續性舉措,電機的效率和壽命的能源消耗應該是在決策過程中的一個重要因素時,一個新的購買與重繞的馬達。

高效節能電機,它可以是二到百分之八,效率比標準電機,欠其優異的性能,功能,新的技術和設計制造的改進。更好的電氣鋼和更多的銅在卷繞幫助減少的電動機的能量損失,這就需要一個較小的散熱風扇。釹磁鐵,這是用于電動汽車用馬達,使電機產生具有較高功率密度更高馬力在一個較小的框架。制造電機,低電損耗鋼和更薄的定子疊片可以減少電力損耗。延長的核心和使用更符合空氣動力學的散熱風扇,可以進一步減少能源浪費。高效節能電機,但更昂貴的初期,有較長的絕緣和軸承壽命,振動小,壽命可靠性增加。

“電機采購價是其生活成本的基礎上有20年的壽命大約只有2%,馬林諾夫斯基說:”約翰,高級產品經理,交流電機保德電機公司。 “當電機的采購價相比,連續運行電機的電力約11倍的購買價格?!閉雇約郾鵲諞壞乃枷?,制造商可以節省數千美元,每年的能源成本。

技術門檻

NEMA電機和發電機組已經建立了優質的能源效率電機的程序達成共識的基礎上定義的“溢價效率,提供規范,高效節能的產品?!泵攔茉床懇膊歡狹釗斯奈璧牡緇圃焐?,以提高效率,但馬林諾夫斯基說,“我們的技術門檻,有沒有更多的?!?/P>

他補充說,在電機制造商正在尋找新的技術,為未來的工業電機,如制造,采用釹磁鐵,這使得功率密度,高效率馬達。 “雖然這些電機是非常有效的,投資回收期延長,因為對他們已經從中國永磁材料的成本增加,”他說。

一種能量高效的電機可以是高達96%的效率,但如果其它系統組件只在50%的效率工作,一個高效的電機的潛力會去看不見。誰想要在他們的流程,以^大限度地提高效率的制造商正在尋找一切可能的機會,而不僅僅是電機。 “我們必須超越簡單的組件更換,”馬林諾夫斯基說,建議制造商在整個電機系統,它可以由配電變壓器,智能起動,或變頻調速,電機,機械動力傳動部件,如以及被驅動的負載。

被驅動的負載的效率,設置所需的馬力來驅動的移動設備所必需的水平,和一個較舊的泵或壓縮機可能不會像今日取得的效率隨著新技術。切換到一個新的泵或壓縮機可以減少電機的評級。一個舊的變速箱,用于將電機連接到負載,可能有50%至60%的效率評級,其中一個新的傳動裝置可具有95%至96%的效率。切換到一個新的买一套棋牌app需要多少,可以降低電機的尺寸和功耗要求了近一半。

“雖然更復雜的系統,這是真正的低懸的果實是今天,馬林諾夫斯基說?!蔽稅鎦突攔賴緇捌湎喙叵低車哪茉蔥棖?,美國保德電機節能評估小組來看看目前在使用的過程和看到,如果有機會,以節省能源,提高生產效率。

電機的真正的敵人

而能源消費是一個重要的關注與電機,馬林諾夫斯基說:“敵人的電機是真熱。它的熱和摩擦?!八饈退?,每10度Ç溫度越高,電機得到,絕緣壽命將減少一半。軸承運行熱,造成油脂持續的時間較短的時間和軸承故障的風險增加。馬林諾夫斯基說,電機故障的原因之一是因為不正確軸承脂潤滑,要么過多,過少,或不兼容的類型的油脂。

“因此,預防性維護是不錯的,”他補充說。許多新的監測系統可今天,現在可以收看到地面水平的軸承溫度,振動水平,電阻和電壓。一旦限制到大,重要的工業電機,此級別的監視正在成為越來越多的更小,更整體的電機。無線連接選項也在陸續推出,進一步擴大了一次成本過高,切出的數千英尺的電線,將電機連接到中控室的監控選項。

 汽車在總能源使用量的工業產品制造商,有一個顯著的影響,隨著越來越多的制造商希望在他們的流程,^大限度地提高效率更高效率的馬達和系統將成為優先事項。一個良好的預防性維護計劃,將有助于提高系統的可靠性。

馬林諾夫斯基說:“當人們獲得更舒適的如何做這些事情,他們得到采納,那將是一件好事?!?


原文:

Efficient Electrical Machines
Tue, 04/17/2012 - 1:48pm by Rachel Leisemann Immel, Associate Editor, IMPO
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Energy-efficient motors, which can be two to eight percent more efficient than standard motors, owe their premium performance capabilities to new technologies and design manufacturing improvements.

Motors are found in a variety of industrial applications, powering everyday tools such as fans, blowers, and pumps. According to the U.S. Department of Energy, over half of all electrical energy consumed in the United States is used by electric motors. And the National Electrical Manufacturers Association says electric motor systems account for 70 percent of manufacturing electricity consumption, presenting one of the largest opportunities for energy conservations, and efficiency. Therefore, in the face of economic uncertainty and growing sustainability initiatives, motor efficiency and lifetime energy consumption should be a major factor in the decision-making process when making a new purchase versus rewinding a motor.

Energy-efficient motors, which can be two to eight percent more efficient than standard motors, owe their premium performance capabilities to new technologies and design manufacturing improvements. Better electrical steel and more copper in the winding help reduce a motor’s energy loss, which requires a smaller fan to dissipate heat. Neodymium magnets, which are used in electric vehicle motors, allow motors to be produced with a higher power density—higher horsepower in a smaller frame. Manufacturing motors with lower-electrical-loss steel and thinner stator laminations can reduce electrical losses. Lengthening the core and using more aerodynamic cooling fans can further reduce energy waste. Energy-efficient motors, though more expensive initially, have longer insulation and bearing lives, less vibration, and increased lifetime reliability.

“The motors purchase price is only about two percent of its life cost based on a 20 year life,” says John Malinowski, senior product manager, AC Motors with Baldor Electric Company. “When compared to a motor’s purchase price, electricity to run the motor continuously is about 11 times the purchase price.” Looking beyond first cost thinking could save a manufacturer thousands of dollars a year in energy costs alone.

The Technological Threshold

The NEMA Motor and Generator Section has established a premium energy efficiency motors program to provide standardized, highly energy efficient products based on a consensus definition of “premium efficiency.” The U.S. Department of energy is also continually encouraging motor manufacturers to improve efficiency, but Malinowski says, “we’re at about the technological threshold—there is no more.”

He adds that motor manufacturers are now looking at new technologies for future industrial motors, such as manufacturing them with neodymium magnets, which allows for a more power dense, high efficiency motor. “Although these motors are very efficient, payback on them has been extended because of the cost increases from China on magnet materials,” he says.

An energy efficient motor can be up to 96 percent efficient, but an efficient motor’s potential will go unseen if other system components are only working at 50 percent efficiency. Manufacturers who want to maximize efficiency in their processes are looking at all possible opportunities—not just the motor. “One must look beyond simple component replacement,” Malinowski says, and advises that manufacturers look at the entire motor system, which may consist of the power distribution transformer, smart starter, or adjustable speed drive, electric motor, mechanical power transmission components, as well as the driven load.

The efficiency of the driven load sets the required horsepower level necessary to drive the device, and an older pump or compressor may not be as efficient as new technologies available today. Switching to a new pump or compressor can reduce the motor rating. An older gearbox, used to connect the motor to the load, may have an efficiency rating of 50 to 60 percent, where a new gear may have 95 to 96 percent efficiency. Switching to a newer helical or bevel gear can reduce the motor size and power requirements by nearly half.

“Although systems are more complicated to do, this is where the real low hanging fruit is today,” Malinowski says. To help customers assess the energy requirements of their motor and its related systems, Baldor Electric energy assessment teams are available to look at the processes currently in use and see if there are opportunities to save energy and increase productivity.

A Motor’s Real Enemy

While energy consumption is a major concern with motors, Malinowski says “the enemy of a motor is really heat. It’s heat and friction.” He explains that for every 10 degrees C hotter the motor gets, the insulation life is cut in half. The bearings run hotter, causing grease to last for a shorter period of time and the risk of bearing failure to increase. Malinowski says that the number one cause of motor failure is because of bearings being incorrectly greased, with either too much, too little, or an incompatible type of grease.

“So preventive maintenance is good,” he adds. A number of new monitoring systems are available today that can now watch bearing temperatures, vibrations levels, resistances, and voltage to ground levels. Once limited to large, critical industrial motors, this level of monitoring is becoming more and more available for smaller, less integral motors. Wireless connectivity options are also being introduced, further expanding once cost-prohibitive monitoring options by cutting out the thousands of feet of wire that would be necessary to connect a motor to the control room.

 Motors have a significant impact on the total energy usage of an industrial manufacturer, and as more manufacturers look to maximize efficiency in their processes, higher efficiency motors and systems will become a priority. And a good preventive maintenance program will help to improve system reliability.

Malinowski says, “As people get more comfortable with how to do these things, and they get adopted, that’s going to be a good thing.”


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