D88尊龙

你好,歡迎來到濟南D88尊龙環能燃氣發電設備有限公司官方網站!

D88尊龙沼氣發電機組軸電流故障怎么診斷?

來源:http://dgxcbw.com   發布于:2018-08-14

D88尊龙因為轉子帶電引起軸電流造成機器元件損傷的情況較早泛起在沼氣發電機,故一般把軸電流形成的原因與電磁效應聯系起來。跟著大型石油、化工裝置,特別是化肥裝置中蒸汽透平驅動離心壓縮機組的應用,軸電流影響沼氣發電機長周期安全運行的題目越來越凸起,它在沼氣發電機的推力軸承、徑向軸承、聯軸節、浮環密封以及傳動齒輪等部位產生電火花放電,損傷金屬表面,破壞油膜形成。假如這種損傷沒有及時檢測到,則會給機器運轉帶來良多題目,并可能造成機器主要元件的嚴峻破壞。

Because the axial current caused by the rotor charged ultimately causes damage to machine components in the early emergence of biogas generator, so generally the formation of shaft current and electromagnetic effects associated. With the application of centrifugal compressors driven by steam turbines in large petroleum and chemical plants, especially in fertilizer plants, the problem of shaft current affecting the long-term safe operation of biogas generators has become increasingly prominent. It is produced in thrust bearings, radial bearings, coupling, floating ring seals and transmission gears of biogas generators. The electric spark discharge damages the metal surface and destroys the formation of oil film. If this damage is not detected in time, it will bring many problems to the operation of the machine, and may cause severe damage to the main components of the machine.

D88尊龙有關軸電流故障的先容資料比較少見,在此結合出產中碰到的實際題目做一簡樸先容。

D88尊龙The introduction of shaft current fault is relatively rare, in this connection with the actual problems encountered in production to do a simple introduction.

QQ截圖20171025151828.jpg

旋轉中的軸須采用一定的潤滑方式使轉子與軸承保持不直接接觸,即整個轉子在高速旋轉時與靜子之間有油膜絕緣。因為轉子對地存在電阻,一旦帶電,就會建立起對地電壓,當電壓升高到某一數值,就會在電阻小的區域擊穿,發生電火花放電。這種放電作用所帶來的主要后果如下:

D88尊龙Rotating shaft must adopt a certain lubrication way to keep the rotor and bearings in direct contact, that is, the entire rotor and stator in high-speed rotation between the oil film insulation. Because the rotor has resistance to the ground, once charged, it will establish a voltage to the ground, when the voltage rises to a certain value, it will break down in the area of the smallest resistance, spark discharge occurs. The main consequences of this discharge are as follows:

D88尊龙(1)在放電區域熔化金屬粒子,在金屬表面形成極微小的電蝕凹坑;

(1) melting metal particles in the discharge area and forming tiny electrical pitting on the metal surface.

D88尊龙(2)凹坑的蘊蓄使表面變得粗拙,失去光澤,假如發生在軸瓦上則會產生純機械磨損;

D88尊龙(2) The pits make the surface rough and lose luster. If they occur on the bearing bush, pure mechanical wear will occur.

(3)熔化的金屬微粒進入潤滑系統,使潤滑劑受到污染,整個潤滑系統的潤滑機能變壞,而且含有大量金屬微粒的潤滑劑會降低油膜電阻,加速電火花腐蝕的進展;

(3) The molten metal particles enter the lubrication system, causing the lubricant to be polluted, the lubrication function of the whole lubrication system deteriorates, and the lubricant containing a large number of metal particles will reduce the oil film resistance and accelerate the progress of EDM corrosion.

(4)在軸承承載區產生局部高溫,破壞油膜,燒壞金屬,增加磨耗,造成嚴峻的摩擦損壞。

D88尊龙(4) Local high temperature occurs in bearing bearing bearing area, which destroys oil film, burns out metal, increases wear and eventually causes severe friction damage.

D88尊龙在旋轉機械的轉子系統中,輕易發生電火花放電的部位是徑向軸承和止推軸承的承載面、齒式聯軸器的工作齒面以及浮環密封面,這些部位因運行中的多種前提變化(如負荷、溫度、潤滑狀況以及轉子振動等),均有可能會使油膜和氣隙電阻減小,在這些部位引起電火花放電現象。

In the rotor system of rotating machinery, the most easily discharged parts are the bearing surface of radial bearing and thrust bearing, the working tooth surface of tooth coupling and the sealing surface of floating ring. These parts may cause oil because of various premises (such as load, temperature, lubrication condition and rotor vibration, etc.). The film and air gap resistance decrease, resulting in EDM phenomenon at these locations.

對于徑向滑動軸承,軸承電蝕凹坑的發展會使巴氏合金表面受到嚴峻的侵蝕,這不僅會改變軸承的原有間隙,而且表面光潔度下降還會導致軸承表面的擦傷和擦痕、局部高溫順燒傷。高速輕載軸承表面巴氏合金的磨耗會使一部門軸瓦瓦塊失去對轉子軸頸的預負荷作用,轉子在旋轉時輕易誘發油膜渦動,造成轉子系統的不不亂。而不不亂的油膜反過來又會引起軸承油膜電阻的急劇下降,使更多的軸電暢通流暢過該區域,加劇電火花作用,彼此相互激勵,導致軸承或轉子系統的損壞。

For radial journal bearings, the development of electric erosion pits in bearings will cause severe erosion on the surface of Babbitt alloy. This will not only change the original clearance of bearings, but also lead to surface abrasion and scratches, local high temperature along burn. The wear of Babbitt alloy on the surface of high-speed light-load bearing will cause a part of bearing bush to lose the preloading effect on the rotor journal. The oil film whirl is easily induced when the rotor rotates, resulting in the rotor system is not disturbed. On the other hand, the disorderly oil film will cause a sharp drop in the resistance of bearing oil film, make more shaft electricity flow smoothly through this area, aggravate the role of electric spark, excite each other, and ultimately lead to the damage of bearing or rotor system.

本文由沼氣發電機組提供技術支持,更多的詳細精彩內容請點擊http://dgxcbw.com 我們的官方網站,我們將會全心全意為您提供滿意的服務。

D88尊龙This article is supported by biogas generator. For more details, please click on our official website at http://dgxcbw.com. We will provide you with satisfactory service wholeheartedly.


上一篇:內燃發電機組冷熱電聯供系統介紹
下一篇:沼氣發電機組的工作離不開哪些步驟?