The invention discloses a single piston three chamber pneumatic brake braking reset, which belongs to the technical field of hydraulic turbines, mainly to solve the existing technology of brake seal performance is not stable, so the problem of inferior vena cava easily. The brake comprises a piston cylinder with the piston, the piston cylinder is provided with a brake device is fixedly connected with the piston, between the piston and the piston cylinder is provided with a bushing, the bushing is connected with the upper end of the fixed plate and the piston cylinder liner, piston, between the liner and piston cylinder 22 are respectively arranged in the outer wall of the piston cylinder sealing ring. Is also provided with a locking device, a separation cavity communicating with the outside atmosphere is arranged between the piston and the piston cylinder. The invention also provides a method for realizing the brake, through the implementation of ingenious coordination method and brake structure, not only greatly improves the sealing performance, but also effectively avoids the brake chamber and the lower leakage, ensure that the brake has good working performance.
【技术实现步骤摘要】
本专利技术涉及一种制动器,具体地说,是涉及一种用于水力发电机组中的单活塞三腔气动复位式制动器及其实现方法。
技术介绍
制动器(俗称风闸)是水力发电机组制动系统的核心组件,其结构主要包括带活塞的活塞缸,以及活塞缸上方的制动板,在活塞顶起制动板与复位状态下,活塞底部将与活塞缸之间形成一个空腔,简称下腔,而活塞顶部与制动板之间形成的空腔,简称上腔。制动器在水力发电机组工作过程中主要有制动和顶起两个功能①在机组停机过程中,当转速下降到较低转速时,制动器中的活塞迅速顶起,制动加间,避免机组长时间在低转速下运行致使推力瓦与导轴瓦因干摩擦而损坏,此后在机组停机备用状态下,制动器保持制动加闸状态,避免因导叶漏水而导致机组蠕动;②在机组开机过程中,制动器复位松间为机组开机流程的一个重要判断依据,此后在机组并网发电状态下,制动器保持复位松间状态,机组在水力作用下得以自由转动。此外,在机组安装或检修期间,用高压油泵向制动器的下腔泵入液压油,可用作千斤顶顶起转子。目前,国内外大型水力发电机组普遍采用的制动器为单活塞双腔气动复位式制动器。现有的这种单活塞双腔气动复位式制动器主要存在以下问 ...
【技术保护点】
1.一种单活塞三腔气动复位式制动器,包括内置有活塞(7)的活塞缸(6),该活塞缸(6)上端设置有与活塞(7)固定连接的制动装置,在活塞(7)与活塞缸(6)之间设置有衬套(5),该衬套(5)上端通过衬套固定板(3)与活塞缸(6)连接,在衬套(5)、活塞缸(6)、活塞(7)两两之间分别设置有密封圈,在活塞缸(6)外壁上还设置有锁定装置(4),其特征在于,所述活塞(7)与活塞缸(6)之间还设置有与外界大气连通的隔离腔(10)。
【技术特征摘要】
【专利技术属性】
技术研发人员:邓林森,李攀光,任开福,任泽民,栗建峰,陈玉林,张海滨,
申请(专利权)人:国电大渡河流域水电开发有限公司龚嘴水力发电总厂,
类型:发明
国别省市:51
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