文章來源：中國華電集團公司 發布時間：2015-01-22
1月15日，華電云南金沙江中游水電開發有限公司梨園水電站首臺機組（4#機組）開始了定子疊片安裝，定子組裝進入關鍵安裝環節，預定工期為60天。
梨園水(shui)電(dian)站發電(dian)機組為(wei)單(dan)機容量60萬千瓦的立(li)軸混流(liu)式水(shui)輪(lun)發電(dian)機。定(ding)(ding)子鐵芯(xin)高2.9米(mi)，外徑(jing)16.88米(mi)，內徑(jing)15.92米(mi)，總重448.492噸，包括定(ding)(ding)子沖片(pian)(pian)(pian)(pian)、測(ce)溫沖片(pian)(pian)(pian)(pian)、通(tong)風槽片(pian)(pian)(pian)(pian)、調整片(pian)(pian)(pian)(pian)、絕緣(yuan)墊圈(quan)等(deng)構件(jian)。鐵芯(xin)沖片(pian)(pian)(pian)(pian)材(cai)料是用(yong)磁導率(lv)高、單(dan)位損(sun)耗低、無取(qu)向的優質冷軋(ya)硅鋼片(pian)(pian)(pian)(pian)沖制而成的扇形片(pian)(pian)(pian)(pian)，厚度均為(wei)0.5毫米(mi)。安裝(zhuang)時(shi)，定(ding)(ding)子鐵芯(xin)采用(yong)分段(duan)疊裝(zhuang)，6次壓緊(jin)，順時(shi)針(zhen)疊片(pian)(pian)(pian)(pian)，相(xiang)鄰兩層錯開1/2沖片(pian)(pian)(pian)(pian)搭(da)接(jie)疊裝(zhuang)。近29萬張沖片(pian)(pian)(pian)(pian)通(tong)過120根(gen)雙(shuang)鴿尾(wei)筋、托(tuo)塊與定(ding)(ding)子機座相(xiang)連接(jie)，工藝復雜，精密度高。