半(ban)球(qiu)(qiu)(qiu)(qiu)形(xing)(xing)(xing)(xing)(xing)封(feng)(feng)頭(tou)實(shi)際(ji)上(shang)就是(shi)(shi)(shi)一(yi)(yi)(yi)個半(ban)球(qiu)(qiu)(qiu)(qiu)體(ti)，直(zhi)徑(jing)較(jiao)小的(de)(de)(de)(de)(de)半(ban)球(qiu)(qiu)(qiu)(qiu)形(xing)(xing)(xing)(xing)(xing)封(feng)(feng)頭(tou)可整體(ti)壓(ya)制成形(xing)(xing)(xing)(xing)(xing)，大(da)型球(qiu)(qiu)(qiu)(qiu)形(xing)(xing)(xing)(xing)(xing)封(feng)(feng)頭(tou)，而(er)于(yu)直(zhi)徑(jing)較(jiao)大(da)的(de)(de)(de)(de)(de)則由(you)于(yu)其深(shen)度太(tai)大(da)，整體(ti)壓(ya)制困難，故采(cai)用(yong)數塊大(da)小相(xiang)同的(de)(de)(de)(de)(de)梯形(xing)(xing)(xing)(xing)(xing)球(qiu)(qiu)(qiu)(qiu)面(mian)板(ban)和頂(ding)部中心的(de)(de)(de)(de)(de)一(yi)(yi)(yi)塊球(qiu)(qiu)(qiu)(qiu)面(mian)板(ban)（球(qiu)(qiu)(qiu)(qiu)冠(guan)）組(zu)焊(han)而(er)成。球(qiu)(qiu)(qiu)(qiu)冠(guan)的(de)(de)(de)(de)(de)作用(yong)是(shi)(shi)(shi)把梯形(xing)(xing)(xing)(xing)(xing)球(qiu)(qiu)(qiu)(qiu)面(mian)板(ban)之間的(de)(de)(de)(de)(de)焊(han)縫間隔開，以保(bao)持一(yi)(yi)(yi)定的(de)(de)(de)(de)(de)距離，避免應(ying)(ying)(ying)力集中。 ? ? ? ? 根據強度計算(suan)，半(ban)球(qiu)(qiu)(qiu)(qiu)形(xing)(xing)(xing)(xing)(xing)封(feng)(feng)頭(tou)的(de)(de)(de)(de)(de)壁厚都小于(yu)筒(tong)(tong)體(ti)壁厚，為了(le)減少其連接(jie)處(chu)由(you)于(yu)幾何形(xing)(xing)(xing)(xing)(xing)狀不連續而(er)產生(sheng)的(de)(de)(de)(de)(de)局(ju)部應(ying)(ying)(ying)力，半(ban)球(qiu)(qiu)(qiu)(qiu)形(xing)(xing)(xing)(xing)(xing)封(feng)(feng)頭(tou)與筒(tong)(tong)體(ti)的(de)(de)(de)(de)(de)連接(jie)有過(guo)渡(du)段。 ? ? ? ?無折邊球(qiu)(qiu)(qiu)(qiu)形(xing)(xing)(xing)(xing)(xing)封(feng)(feng)頭(tou)。無折邊球(qiu)(qiu)(qiu)(qiu)形(xing)(xing)(xing)(xing)(xing)封(feng)(feng)頭(tou)是(shi)(shi)(shi)一(yi)(yi)(yi)塊深(shen)度很小的(de)(de)(de)(de)(de)球(qiu)(qiu)(qiu)(qiu)面(mian)體(ti)（球(qiu)(qiu)(qiu)(qiu)冠(guan)），實(shi)際(ji)上(shang)就是(shi)(shi)(shi)為了(le)減小深(shen)度而(er)將半(ban)球(qiu)(qiu)(qiu)(qiu)形(xing)(xing)(xing)(xing)(xing)封(feng)(feng)頭(tou)或碟形(xing)(xing)(xing)(xing)(xing)封(feng)(feng)頭(tou)的(de)(de)(de)(de)(de)大(da)部分除掉，只(zhi)取(qu)其上(shang)的(de)(de)(de)(de)(de)球(qiu)(qiu)(qiu)(qiu)面(mian)體(ti)而(er)成。它結構簡(jian)單，深(shen)度淺，容易制造，成本(ben)也(ye)較(jiao)低。但是(shi)(shi)(shi)它與筒(tong)(tong)體(ti)的(de)(de)(de)(de)(de)連接(jie)處(chu)存在明(ming)顯(xian)的(de)(de)(de)(de)(de)形(xing)(xing)(xing)(xing)(xing)狀突變(bian)導(dao)致很高的(de)(de)(de)(de)(de)局(ju)部應(ying)(ying)(ying)力，這(zhe)一(yi)(yi)(yi)應(ying)(ying)(ying)力往往是(shi)(shi)(shi)封(feng)(feng)頭(tou)和筒(tong)(tong)體(ti)正常(chang)部位應(ying)(ying)(ying)力的(de)(de)(de)(de)(de)好幾倍，故受力狀況不良(liang)。因(yin)此這(zhe)種封(feng)(feng)頭(tou)一(yi)(yi)(yi)般只(zhi)用(yong)于(yu)直(zhi)徑(jing)較(jiao)小，壓(ya)力較(jiao)低的(de)(de)(de)(de)(de)容器上(shang)。為了(le)保(bao)證封(feng)(feng)頭(tou)和筒(tong)(tong)體(ti)連接(jie)處(chu)不至遭到破壞，要求連接(jie)處(chu)角焊(han)縫采(cai)用(yong)全焊(han)透結構。

各種(zhong)連(lian)接(jie)的(de)(de)(de)(de)(de)(de)結(jie)(jie)(jie)構(gou)(gou)(gou)特點 在(zai)壓力(li)容器(qi)設計(ji)中常常遇到半(ban)球(qiu)(qiu)形封(feng)(feng)(feng)頭(tou)(tou)(tou)與筒(tong)(tong)(tong)(tong)體(ti)(ti)(ti)(ti)(ti)的(de)(de)(de)(de)(de)(de)連(lian)接(jie)的(de)(de)(de)(de)(de)(de)結(jie)(jie)(jie)構(gou)(gou)(gou)。厚(hou)(hou)(hou)度(du)不太厚(hou)(hou)(hou)的(de)(de)(de)(de)(de)(de)情況下可以(yi)封(feng)(feng)(feng)頭(tou)(tou)(tou)和(he)(he)(he)(he)筒(tong)(tong)(tong)(tong)體(ti)(ti)(ti)(ti)(ti)等厚(hou)(hou)(hou)，但是(shi)(shi)在(zai)壓力(li)較(jiao)(jiao)(jiao)高，筒(tong)(tong)(tong)(tong)體(ti)(ti)(ti)(ti)(ti)和(he)(he)(he)(he)封(feng)(feng)(feng)頭(tou)(tou)(tou)都比(bi)(bi)較(jiao)(jiao)(jiao)厚(hou)(hou)(hou)并且筒(tong)(tong)(tong)(tong)體(ti)(ti)(ti)(ti)(ti)和(he)(he)(he)(he)封(feng)(feng)(feng)頭(tou)(tou)(tou)厚(hou)(hou)(hou)度(du)相差較(jiao)(jiao)(jiao)多的(de)(de)(de)(de)(de)(de)時(shi)候，采(cai)用(yong)(yong)(yong)等厚(hou)(hou)(hou)度(du)結(jie)(jie)(jie)構(gou)(gou)(gou)顯然(ran)是(shi)(shi)不合理的(de)(de)(de)(de)(de)(de)。關于(yu)封(feng)(feng)(feng)頭(tou)(tou)(tou)比(bi)(bi)筒(tong)(tong)(tong)(tong)體(ti)(ti)(ti)(ti)(ti)薄的(de)(de)(de)(de)(de)(de)情況，GB150的(de)(de)(de)(de)(de)(de)附錄J和(he)(he)(he)(he)JB4732附錄H都推薦了幾種(zhong)結(jie)(jie)(jie)構(gou)(gou)(gou)尺寸(cun)（如(ru)GB150圖(tu)J1（d）、（e）、（f））。其(qi)中： 結(jie)(jie)(jie)構(gou)(gou)(gou)1：圖(tu)J1（d）是(shi)(shi)筒(tong)(tong)(tong)(tong)體(ti)(ti)(ti)(ti)(ti)和(he)(he)(he)(he)封(feng)(feng)(feng)頭(tou)(tou)(tou)中徑(jing)(jing)對(dui)(dui)齊(qi)的(de)(de)(de)(de)(de)(de)結(jie)(jie)(jie)構(gou)(gou)(gou)。 結(jie)(jie)(jie)構(gou)(gou)(gou)2：圖(tu)J1（e）的(de)(de)(de)(de)(de)(de)結(jie)(jie)(jie)構(gou)(gou)(gou)，筒(tong)(tong)(tong)(tong)體(ti)(ti)(ti)(ti)(ti)和(he)(he)(he)(he)封(feng)(feng)(feng)頭(tou)(tou)(tou)中徑(jing)(jing)有(you)(you)(you)≤0.5（δn－δb）的(de)(de)(de)(de)(de)(de)偏離(li)。 結(jie)(jie)(jie)構(gou)(gou)(gou)3;圖(tu)J1（f）的(de)(de)(de)(de)(de)(de)結(jie)(jie)(jie)構(gou)(gou)(gou)，筒(tong)(tong)(tong)(tong)體(ti)(ti)(ti)(ti)(ti)和(he)(he)(he)(he)封(feng)(feng)(feng)頭(tou)(tou)(tou)內(nei)徑(jing)(jing)對(dui)(dui)齊(qi)。 這(zhe)(zhe)幾種(zhong)結(jie)(jie)(jie)構(gou)(gou)(gou)都是(shi)(shi)在(zai)筒(tong)(tong)(tong)(tong)體(ti)(ti)(ti)(ti)(ti)和(he)(he)(he)(he)封(feng)(feng)(feng)頭(tou)(tou)(tou)連(lian)接(jie)的(de)(de)(de)(de)(de)(de)切(qie)線處向封(feng)(feng)(feng)頭(tou)(tou)(tou)方向逐(zhu)漸減薄形成(cheng)錐(zhui)形（單(dan)面或雙面的(de)(de)(de)(de)(de)(de)）過渡(du)(du)，而在(zai)制造時(shi)這(zhe)(zhe)是(shi)(shi)一段(duan)(duan)單(dan)獨的(de)(de)(de)(de)(de)(de)筒(tong)(tong)(tong)(tong)節—過渡(du)(du)段(duan)(duan)。所以(yi)封(feng)(feng)(feng)頭(tou)(tou)(tou)在(zai)底邊有(you)(you)(you)所加(jia)強(qiang)，封(feng)(feng)(feng)頭(tou)(tou)(tou)的(de)(de)(de)(de)(de)(de)等厚(hou)(hou)(hou)部分實際(ji)不是(shi)(shi)完(wan)整的(de)(de)(de)(de)(de)(de)半(ban)球(qiu)(qiu)而是(shi)(shi)一個(ge)球(qiu)(qiu)冠(guan)。這(zhe)(zhe)樣實際(ji)上就(jiu)成(cheng)了圓筒(tong)(tong)(tong)(tong)、過渡(du)(du)段(duan)(duan)和(he)(he)(he)(he)球(qiu)(qiu)冠(guan)的(de)(de)(de)(de)(de)(de)連(lian)接(jie)，例如(ru)結(jie)(jie)(jie)構(gou)(gou)(gou)2，有(you)(you)(you)的(de)(de)(de)(de)(de)(de)球(qiu)(qiu)冠(guan)的(de)(de)(de)(de)(de)(de)深度(du)僅(jin)(jin)為(wei)球(qiu)(qiu)半(ban)徑(jing)(jing)的(de)(de)(de)(de)(de)(de)0.8。 結(jie)(jie)(jie)構(gou)(gou)(gou)4：還(huan)有(you)(you)(you)一種(zhong)結(jie)(jie)(jie)構(gou)(gou)(gou)，就(jiu)是(shi)(shi)完(wan)整的(de)(de)(de)(de)(de)(de)半(ban)球(qiu)(qiu)形封(feng)(feng)(feng)頭(tou)(tou)(tou)與筒(tong)(tong)(tong)(tong)體(ti)(ti)(ti)(ti)(ti)連(lian)接(jie)，在(zai)連(lian)接(jie)處內(nei)徑(jing)(jing)對(dui)(dui)齊(qi)，在(zai)筒(tong)(tong)(tong)(tong)體(ti)(ti)(ti)(ti)(ti)外側倒角(jiao)過渡(du)(du)。這(zhe)(zhe)種(zhong)情況是(shi)(shi)完(wan)整的(de)(de)(de)(de)(de)(de)半(ban)球(qiu)(qiu)形封(feng)(feng)(feng)頭(tou)(tou)(tou)與筒(tong)(tong)(tong)(tong)體(ti)(ti)(ti)(ti)(ti)連(lian)接(jie)，不用(yong)(yong)(yong)過渡(du)(du)段(duan)(duan)，而在(zai)筒(tong)(tong)(tong)(tong)體(ti)(ti)(ti)(ti)(ti)外側有(you)(you)(you)1：3倒角(jiao)過渡(du)(du)。 2、局部應(ying)(ying)力(li)分析 下面是(shi)(shi)一個(ge)用(yong)(yong)(yong)ANSYS分析的(de)(de)(de)(de)(de)(de)實際(ji)的(de)(de)(de)(de)(de)(de)例子(zi)： 計(ji)算壓力(li)p=16.3MPa，設計(ji)溫度(du)150°C。 封(feng)(feng)(feng)頭(tou)(tou)(tou)材料(liao)是(shi)(shi)16MnR，設計(ji)應(ying)(ying)力(li)強(qiang)度(du)Smh=150MPa，大(da)型球(qiu)(qiu)形封(feng)(feng)(feng)頭(tou)(tou)(tou)定(ding)做，筒(tong)(tong)(tong)(tong)體(ti)(ti)(ti)(ti)(ti)材料(liao)為(wei)16Mn鍛件，設計(ji)應(ying)(ying)力(li)強(qiang)度(du)Smn=157MPa。 筒(tong)(tong)(tong)(tong)體(ti)(ti)(ti)(ti)(ti)內(nei)直(zhi)徑(jing)(jing)2400mm，筒(tong)(tong)(tong)(tong)體(ti)(ti)(ti)(ti)(ti)厚(hou)(hou)(hou)度(du)148mm，封(feng)(feng)(feng)頭(tou)(tou)(tou)厚(hou)(hou)(hou)度(du)96mm。各種(zhong)結(jie)(jie)(jie)構(gou)(gou)(gou)的(de)(de)(de)(de)(de)(de)封(feng)(feng)(feng)頭(tou)(tou)(tou)內(nei)半(ban)徑(jing)(jing)略有(you)(you)(you)不同。這(zhe)(zhe)個(ge)例子(zi)厚(hou)(hou)(hou)度(du)的(de)(de)(de)(de)(de)(de)余量(liang)是(shi)(shi)比(bi)(bi)較(jiao)(jiao)(jiao)大(da)的(de)(de)(de)(de)(de)(de)，圓整后的(de)(de)(de)(de)(de)(de)有(you)(you)(you)效厚(hou)(hou)(hou)筒(tong)(tong)(tong)(tong)體(ti)(ti)(ti)(ti)(ti)僅(jin)(jin)為(wei)142mm，封(feng)(feng)(feng)頭(tou)(tou)(tou)是(shi)(shi)70mm。所以(yi)應(ying)(ying)力(li)值都比(bi)(bi)較(jiao)(jiao)(jiao)小。 分析所用(yong)(yong)(yong)單(dan)元是(shi)(shi)三角(jiao)形6節點軸對(dui)(dui)稱單(dan)元。

球型(xing)封(feng)頭(tou)(tou)形(xing)狀與受(shou)力情況(kuang)存在什么(me)關系？。球型(xing)封(feng)頭(tou)(tou)常(chang)用于壓力容器上，是(shi)目(mu)前常(chang)用的堵(du)塞(sai)裝置之一，在實際工(gong)作中，由于使用的環境不一樣(yang)(yang)，所以封(feng)頭(tou)(tou)被(bei)制作成不同(tong)的形(xing)狀。很多人會好(hao)奇，大型(xing)球形(xing)封(feng)頭(tou)(tou)生產廠(chang)家，不同(tong)形(xing)狀的封(feng)頭(tou)(tou)在工(gong)作中所受(shou)到的力是(shi)一樣(yang)(yang)的嗎(ma)？球型(xing)封(feng)頭(tou)(tou)廠(chang)家來向你做(zuo)簡單(dan)介(jie)紹。

?我們(men)從封(feng)(feng)(feng)(feng)(feng)(feng)(feng)(feng)(feng)頭(tou)(tou)(tou)(tou)(tou)(tou)受(shou)(shou)力(li)(li)(li)(li)(li)情況來看：球形(xing)(xing)(xing)(xing)(xing)的(de)(de)(de)(de)封(feng)(feng)(feng)(feng)(feng)(feng)(feng)(feng)(feng)頭(tou)(tou)(tou)(tou)(tou)(tou)的(de)(de)(de)(de)兩向(xiang)應(ying)(ying)力(li)(li)(li)(li)(li)是一樣(yang)的(de)(de)(de)(de)，而且在相(xiang)(xiang)同的(de)(de)(de)(de)P和D條件(jian)下，球形(xing)(xing)(xing)(xing)(xing)的(de)(de)(de)(de)封(feng)(feng)(feng)(feng)(feng)(feng)(feng)(feng)(feng)頭(tou)(tou)(tou)(tou)(tou)(tou)上(shang)的(de)(de)(de)(de)應(ying)(ying)力(li)(li)(li)(li)(li)僅為筒(tong)(tong)體上(shang)的(de)(de)(de)(de)周向(xiang)應(ying)(ying)力(li)(li)(li)(li)(li)的(de)(de)(de)(de)一半(ban)；橢(tuo)(tuo)圓(yuan)形(xing)(xing)(xing)(xing)(xing)的(de)(de)(de)(de)封(feng)(feng)(feng)(feng)(feng)(feng)(feng)(feng)(feng)頭(tou)(tou)(tou)(tou)(tou)(tou)經線曲率變化(hua)平滑連續(xu)，故應(ying)(ying)力(li)(li)(li)(li)(li)分布比(bi)較(jiao)(jiao)均勻(yun)，對于標準(zhun)橢(tuo)(tuo)圓(yuan)形(xing)(xing)(xing)(xing)(xing)封(feng)(feng)(feng)(feng)(feng)(feng)(feng)(feng)(feng)頭(tou)(tou)(tou)(tou)(tou)(tou)，在相(xiang)(xiang)同的(de)(de)(de)(de)P和D條件(jian)下，封(feng)(feng)(feng)(feng)(feng)(feng)(feng)(feng)(feng)頭(tou)(tou)(tou)(tou)(tou)(tou)較(jiao)(jiao)大(da)的(de)(de)(de)(de)薄(bo)膜應(ying)(ying)力(li)(li)(li)(li)(li)數值上(shang)與圓(yuan)筒(tong)(tong)中(zhong)的(de)(de)(de)(de)周向(xiang)應(ying)(ying)力(li)(li)(li)(li)(li)相(xiang)(xiang)等(deng)(deng)。因(yin)此橢(tuo)(tuo)圓(yuan)形(xing)(xing)(xing)(xing)(xing)的(de)(de)(de)(de)封(feng)(feng)(feng)(feng)(feng)(feng)(feng)(feng)(feng)頭(tou)(tou)(tou)(tou)(tou)(tou)的(de)(de)(de)(de)受(shou)(shou)力(li)(li)(li)(li)(li)狀況僅次于半(ban)球形(xing)(xing)(xing)(xing)(xing)的(de)(de)(de)(de)封(feng)(feng)(feng)(feng)(feng)(feng)(feng)(feng)(feng)頭(tou)(tou)(tou)(tou)(tou)(tou)，而比(bi)其它封(feng)(feng)(feng)(feng)(feng)(feng)(feng)(feng)(feng)頭(tou)(tou)(tou)(tou)(tou)(tou)好。封(feng)(feng)(feng)(feng)(feng)(feng)(feng)(feng)(feng)頭(tou)(tou)(tou)(tou)(tou)(tou)的(de)(de)(de)(de)結(jie)構形(xing)(xing)(xing)(xing)(xing)式由(you)承載能力(li)(li)(li)(li)(li)、工(gong)(gong)藝(yi)過(guo)程及制(zhi)造(zao)技術等(deng)(deng)方(fang)面要求決定。半(ban)球型(xing)(xing)封(feng)(feng)(feng)(feng)(feng)(feng)(feng)(feng)(feng)頭(tou)(tou)(tou)(tou)(tou)(tou)為受(shou)(shou)力(li)(li)(li)(li)(li)較(jiao)(jiao)理想的(de)(de)(de)(de)結(jie)構形(xing)(xing)(xing)(xing)(xing)式，大(da)型(xing)(xing)球形(xing)(xing)(xing)(xing)(xing)封(feng)(feng)(feng)(feng)(feng)(feng)(feng)(feng)(feng)頭(tou)(tou)(tou)(tou)(tou)(tou)價格，但因(yin)為半(ban)球型(xing)(xing)封(feng)(feng)(feng)(feng)(feng)(feng)(feng)(feng)(feng)頭(tou)(tou)(tou)(tou)(tou)(tou)深度(du)達，當直(zhi)徑(jing)小時，整體沖壓(ya)(ya)困難(nan)，而直(zhi)徑(jing)大(da)時，采用(yong)分瓣沖壓(ya)(ya)的(de)(de)(de)(de)工(gong)(gong)藝(yi)，拼(pin)焊工(gong)(gong)作量也(ye)較(jiao)(jiao)大(da)。錐(zhui)形(xing)(xing)(xing)(xing)(xing)封(feng)(feng)(feng)(feng)(feng)(feng)(feng)(feng)(feng)頭(tou)(tou)(tou)(tou)(tou)(tou)受(shou)(shou)力(li)(li)(li)(li)(li)利于流體均勻(yun)布排料(liao)使用(yong)，較(jiao)(jiao)球形(xing)(xing)(xing)(xing)(xing)封(feng)(feng)(feng)(feng)(feng)(feng)(feng)(feng)(feng)受(shou)(shou)力(li)(li)(li)(li)(li)情況壓(ya)(ya)力(li)(li)(li)(li)(li)容器較(jiao)(jiao)少，采用(yong)采用(yong)橢(tuo)(tuo)圓(yuan)封(feng)(feng)(feng)(feng)(feng)(feng)(feng)(feng)(feng)頭(tou)(tou)(tou)(tou)(tou)(tou)呢，其主要原(yuan)因(yin)是半(ban)球型(xing)(xing)封(feng)(feng)(feng)(feng)(feng)(feng)(feng)(feng)(feng)制(zhi)造(zao)工(gong)(gong)藝(yi)復雜(za)難(nan)度(du)較(jiao)(jiao)所造(zao)價比(bi)橢(tuo)(tuo)圓(yuan)封(feng)(feng)(feng)(feng)(feng)(feng)(feng)(feng)(feng)頭(tou)(tou)(tou)(tou)(tou)(tou)高。碟形(xing)(xing)(xing)(xing)(xing)封(feng)(feng)(feng)(feng)(feng)(feng)(feng)(feng)(feng)頭(tou)(tou)(tou)(tou)(tou)(tou)由(you)于存在過(guo)渡段(duan)，降低了封(feng)(feng)(feng)(feng)(feng)(feng)(feng)(feng)(feng)頭(tou)(tou)(tou)(tou)(tou)(tou)的(de)(de)(de)(de)深度(du)，便(bian)于成型(xing)(xing)加(jia)工(gong)(gong)，但是由(you)于蝶(die)(die)形(xing)(xing)(xing)(xing)(xing)封(feng)(feng)(feng)(feng)(feng)(feng)(feng)(feng)(feng)頭(tou)(tou)(tou)(tou)(tou)(tou)時三種形(xing)(xing)(xing)(xing)(xing)式的(de)(de)(de)(de)封(feng)(feng)(feng)(feng)(feng)(feng)(feng)(feng)(feng)頭(tou)(tou)(tou)(tou)(tou)(tou)中(zhong)受(shou)(shou)力(li)(li)(li)(li)(li)狀態較(jiao)(jiao)不(bu)好的(de)(de)(de)(de)封(feng)(feng)(feng)(feng)(feng)(feng)(feng)(feng)(feng)頭(tou)(tou)(tou)(tou)(tou)(tou)形(xing)(xing)(xing)(xing)(xing)式。橢(tuo)(tuo)圓(yuan)形(xing)(xing)(xing)(xing)(xing)封(feng)(feng)(feng)(feng)(feng)(feng)(feng)(feng)(feng)頭(tou)(tou)(tou)(tou)(tou)(tou)則洗去了半(ban)球型(xing)(xing)封(feng)(feng)(feng)(feng)(feng)(feng)(feng)(feng)(feng)頭(tou)(tou)(tou)(tou)(tou)(tou)受(shou)(shou)力(li)(li)(li)(li)(li)好和蝶(die)(die)形(xing)(xing)(xing)(xing)(xing)封(feng)(feng)(feng)(feng)(feng)(feng)(feng)(feng)(feng)頭(tou)(tou)(tou)(tou)(tou)(tou)深度(du)淺的(de)(de)(de)(de)優點，因(yin)此橢(tuo)(tuo)圓(yuan)封(feng)(feng)(feng)(feng)(feng)(feng)(feng)(feng)(feng)頭(tou)(tou)(tou)(tou)(tou)(tou)結(jie)構特性介于半(ban)球型(xing)(xing)和蝶(die)(die)形(xing)(xing)(xing)(xing)(xing)封(feng)(feng)(feng)(feng)(feng)(feng)(feng)(feng)(feng)頭(tou)(tou)(tou)(tou)(tou)(tou)之間，

還有(you)一(yi)種是球(qiu)冠(guan)形封頭，屬于(yu)凸形封頭。它(ta)在球(qiu)面與(yu)圓筒連接處的(de)曲率(lv)半徑發生突變，產生的(de)不(bu)連續應力相(xiang)當大(da)，因(yin)此球(qiu)冠(guan)形封頭一(yi)般只(zhi)用于(yu)壓(ya)力不(bu)高的(de)場(chang)合。

由(you)此可見，由(you)于使用(yong)的(de)(de)地(di)方不(bu)一樣(yang)，所受的(de)(de)力不(bu)同，因此，在工作中，要根據工作需要選擇(ze)合適的(de)(de)封(feng)(feng)頭進行(xing)工作。選購封(feng)(feng)頭，新(xin)(xin)鄉(xiang)(xiang)封(feng)(feng)頭廠(chang)家(jia)是你明智(zhi)的(de)(de)選擇(ze)，選擇(ze)我廠(chang)的(de)(de)封(feng)(feng)頭。歡迎社會各(ge)界朋友到新(xin)(xin)鄉(xiang)(xiang)封(feng)(feng)頭廠(chang)家(jia)參觀(guan)洽談合作。光大機械新(xin)(xin)鄉(xiang)(xiang)球(qiu)型封(feng)(feng)頭廠(chang)家(jia)愿(yuan)和(he)國內外同仁開(kai)發(fa)出更多、更好、更新(xin)(xin)的(de)(de)產品獻(xian)給客戶，共創美好未來！