机械密封培训讲解.ppt

西部管道密封培训;培训内容概述;机械密封基础 第一部分;Concepts of Mechanical Seals机械密封概念 ;Shaft;Shaft;Shaft Movement 轴的运动;Mating Ring 配合环;O-Ring O型圈;Simply put, a mechanical seal is:简单的说,机械密封就是:;Non-flashing 没有闪蒸;Lubricant润滑剂;Process Fluid Acts as Lubricant Between Faces流体在两个面之间充当润滑剂的过程;Gland密封端盖;Mating Ring 配合环;Heat Transfer热传递;Injection注入;Primary Seal: Flush基本密封:冲洗;Primary Seal: Flush基本密封:冲洗;Primary Seal: Quench 基本密封:急冷;API Piping Plans API 冲洗方案 第二部分;API Piping Plans API 冲洗方案;Integral (internal) recirculation from pump discharge to seal 内部循环从泵的出口到密封;Points to Note for API Plan 02: API 02 冲洗方案应注意的事项： The injection tapping is used for venting prior to start–up. -在开车前，入口用来进行放空 API plan 02 is often used together with plan 62, especially on high temperature bellows seals.冲洗方案2经常与62一起用，特别是用在高温波纹管密封;Points to Note for API Plan 11: API 冲洗方案11 应注意的事项 - Use an orifice to restrict the flow rate if the discharge pressure is 3 bar higher than seal chamber pressure.如果出口压力高于密封腔压力3bar，需要用一个孔限制流量 - Use on clean and low abrasives duties用在干净，含磨石性颗粒少的工矿;Recirculation from seal chamber through a flow control orifice and back to pump suction从密封腔里出通过一个孔板返回到泵的入口;+;Recirculation from pump discharge through a flow control orifice and cooler to seal Open Loop Cooling Circuit;Recirculation from a pumping ring in the seal chamber through cooler and back to seal Closed Loop Cooling Circuit 冲洗液通过密封腔中的泵效环从密封腔中流出经过换热器，再返回到密封中，形成自封闭循环。形成封闭的冷却回路 ;;Recirculation from pump discharge through a cyclone separator delivering clean fluid to the seal and fluid with solids back to pump suction line冲洗液从泵出口流出，通过一旋液分离器，使干净流体进入 密封腔，带有颗粒的流体返回到泵入口处形成封闭循环;Points to Note for API Plan 32:对于API plan 32 须注意: - Chose a proper source of seal flush to eliminate the potential for vaporisation of the injected fluid and to avoid contamination of the fluid being pumped with the injected flush.选择合适的密封冲洗源， 以减少冲洗流体的汽化，同时可避免冲洗流体被污染。 - Install a labyrinth bushing at the bottom of the stuffing box to control the flushing and pressure if necessary.