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集電環的應用范圍

  一般,鋼質集電環的耐磨性好,機械強度大,因此大多用于因極性引起集電環磨損差較大的同步電機上。鋼可以加工成復雜的結構,它是一種容易得到而又價廉物美的材料,所以,廣泛用于包括圓周速度較低的水輪發電機在內的同步電機。對于像汽輪發電機那樣,主要強調高圓周速度下機械強度和耐磨性的集電環,有時也使用鍛鋼。

  另外,要求耐腐蝕性時,可使用不銹鋼,但不銹鋼的滑動特性不穩定,與電刷組合不合適往往使電刷產生跳動,容易造成電刷溫升過高或異常磨損,所以使用時必須倍加注意。青銅鑄件等銅質集電環與鋼質集電環相比,它的滑動特性好,所以用途很廣,但當含有大量低熔點鉛時,因通電點的發熱而產生脫鉛現象,容易造成集電環磨損或電刷異常磨損。

  Generally, steel collector rings have good wear resistance and high mechanical strength, so they are mostly used in synchronous motors with worn collector rings caused by polarity. Steel can be processed into complex structures. It is an easily available and inexpensive material. Therefore, it is widely used in synchronous motors, including hydroelectric generators with low circumferential speed. For collector rings like turbogenerators, which emphasize mechanical strength and wear resistance at high circumferential speeds, forged steel is sometimes used. In addition, stainless steel can be used when corrosion resistance is required, but the sliding characteristics of stainless steel are unstable, and improper combination with brush often causes the brush to jump, which is easy to cause excessive temperature rise or abnormal wear. Therefore, more attention must be paid when using the brush. Compared with steel collector rings, copper collector rings, such as bronze castings, have good sliding characteristics, so they are widely used. However, when containing a large amount of low melting point lead, lead removal occurs due to the heating of the electrifying point, which easily causes abnormal wear of collector rings or brushes.

  集電環與電刷的配合上,當電刷的研磨性過強而集電環的材質過軟時,往往在集電環上發生相當于電刷寬度的階梯磨損。尤其是高溫低濕的全封閉式電機,更容易引起電刷或集電環的過大磨損。重象傷痕是這樣形成的,一開始只有非常小的傷痕,電刷在這些部位集電不良而產生火花。一旦產生火花,傷痕就逐漸惡化擴大起來,最后形成與電刷滑動接觸面的尺寸同樣大小的傷痕。因而,集電環用電刷即使產生非常小的火花,也必須予以注意。

  When the abrasiveness of the brush is too strong and the material of the collector ring is too soft, the step wear of the collector ring which corresponds to the width of the brush often occurs. Especially the closed motor with high temperature and low humidity is more likely to cause excessive wear of brush or collector ring. The duplicate image scar is formed in this way. At first, there are only very small scars. The electric brush collects electricity poorly in these areas and produces sparks. Once sparks occur, the scars gradually deteriorate and expand, and eventually form a scar of the same size as the sliding contact surface of the brush. Therefore, even if the collector ring brush produces very small sparks, it must be paid attention to.

  為了預防在鋼質集電環上發生嚴重的重象傷痕,在電機長期停轉時應將電刷提起。為了改善并聯電刷的電流分布,可移動集電環滑動接觸面的通電點。為了獲得良好的滑動特性,在集電環上開螺旋狀的斜槽是有效的。

  In order to prevent serious duplicate image scars on steel collector rings, brushes should be raised when the motor is shut down for a long time. In order to improve the current distribution of parallel brushes, the switching point of sliding contact surface of collector ring can be moved. In order to obtain good sliding characteristics, it is effective to open spiral inclined grooves on collector ring.

  包裝機械 電子測試設備 醫療設備 旋轉工作臺 展覽和顯示設備 制造和處理控制設備 機器人技術 軍工技術 閉路監控球形云臺。

  Packaging Machinery Electronic Testing Equipment Medical Equipment Rotary Table Exhibition and Display Equipment Manufacturing and Processing Control Equipment Robot Technology Military Technology Closed Circuit Monitoring Spherical Table。

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