casing clearance 中文意思是什麼
casing clearance
解釋
套管柱外環隙-
Twelve casing configurations were investigated, consisting of three step profiles at each of three clearance levels ( including seven casing geometric size ) to find the effects of radial / axial variation of tip gap on rotor performance, and five casing configurations including two types of asymmetric profiles were applied in the research of circumferential variation of tip clearance
文中設計了十二種機匣結構用於與實壁機匣相比較,包括軸向布局的七種階梯狀結構及五種周向變化的不對稱結構形式(偏心周向變化和橢形周向變化) 。 -
To ensure the charging pump working reliably, the following measures should be adopted : ( 1 ) adopting modified circular casing to reduce the radial force of the impeller and decrease the seal clearance ; ( 2 ) using radical ribs on impeller and helical sealing on shaft to realize minor pressure differential ; ( 3 ) using back pressure stuffing box to ensure sealing under small packing force ; ( 4 ) adopting self - lubricant flexible graphite stuffing for absorption of solids entering in the graphite in case of leaking
為確保灌注泵可靠工作,提出改進措施: ( 1 )採用改型環形泵體降低葉輪的徑向力,減小軸封間隙,抑制泄漏; ( 2 )採用背葉片降低葉片根部壓頭,獲得微壓,使軸封兩端承受較小壓差; ( 3 )採用螺旋密封降低軸封兩端壓差,在保持微壓的同時避免出現負壓,密封效果更好; ( 4 )採用反壓式填料密封結構,在很小的壓緊力下,即可保證密封; ( 5 )採用具有潤滑功效的柔性石墨填料,即使發生軸封泄漏,進入石墨內部的固相顆粒也將隨著石墨的消耗而被鉆井液吸收。
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