（一）、結構(gou)特點及功能

QZ系列球型支座是由(you)上(shang)支座板(ban)(ban)、下支座板(ban)(ban)、凸形中(zhong)(zhong)間(jian)(jian)(jian)板(ban)(ban)及兩(liang)塊不(bu)同形狀的聚(ju)四氟乙烯板(ban)(ban)組成。下支座板(ban)(ban)中(zhong)(zhong)間(jian)(jian)(jian)為一凹形球面，同凸形中(zhong)(zhong)間(jian)(jian)(jian)包相對應(ying)，兩(liang)者之間(jian)(jian)(jian)有一弧(hu)形四氟板(ban)(ban)，通(tong)過求美(mei)棉(mian)與滑動來滿足梁(liang)端的轉動；上(shang)座板(ban)(ban)上(shang)的不(bu)銹鋼板(ban)(ban)與中(zhong)(zhong)間(jian)(jian)(jian)鋼板(ban)(ban)上(shang)的另一四氟板(ban)(ban)組成第二(er)滑動面，完成梁(liang)體(ti)因溫差諸多原(yuan)因所產生的伸縮位移。

QZ球型支座以傳力(li)可靠，各向轉(zhuan)動性能(neng)(neng)一致 轉(zhuan)動靈(ling)活的特點(dian)，不僅具備(bei)盆(pen)式(shi)橡膠支座承載(zai)能(neng)(neng)力(li)大，水平位移(yi)大等(deng)特點(dian)，而且能(neng)(neng)更好(hao)地適應(ying)大轉(zhuan)角的需要，適用于寬橋(qiao)、曲線橋(qiao)。由于承壓部(bu)件(jian)不使用橡膠件(jian)，不存在(zai)橡膠低溫脆(cui)性等(deng)影(ying)響，因此特別適用于低溫地區。