环境控制和专用密封

1、Environmental controls and special seals 环境控制和专用密封Steven_Tianjin1Environmental controls and special seals 环境控制和专用密封For any given seal application problem there are two generally accepted solutions :对于任何给定密封应用的问题,这里有两个通常的可以接受的方法Build a special seal that can compensate for the problem once it occurs.

2、建造一个特殊的密封,一旦它发生,它对这些问题给予补偿Control the environment surrounding the seal to prevent the problem from occurring in the first place. If you control the seal environment you will avoid the inventory and delivery problems associated with special seals.控制密封周围的环境,在第一地点防止问题的发生.如果你控制密封环境,你将避免与特殊密封相关的库存和交货问题In

3、 the following paragraphs I will be covering each of these environmental controls in detail.在以下的章节中,我们将覆盖这些环境控制中的每一个细节2CONTROLLING THE TEMPERATURE IN THE STUFFING BOX AREA控制填料箱内区域的温度Flush the stuffing box ( port C in the illustrations at the end of this paper) with a compatible, cool, clean liquid.

4、Many seal glands have this connection available in a more convenient location than the lantern ring connection. Flush is a misunderstood term. It describes six very different functions: 使用一个兼容的,凉的,干净的液体冲洗填料箱(在本文末尾插图中的口)许多密封压盖有这种连接可用，它是比套环连接更方便的位置冲洗是一个误解的术语它描述个非常不同的功能Discharge recirculation, where a

5、line is connected from the discharge side of the pump to the lantern ring connection in the stuffing box (A), or an appropriate connection in the gland. 排放再循环，这里有一个管线从泵的排放侧连到填料箱（）中的套环上，或压盖中的一个恰当的连接3CONTROLLING THE TEMPERATURE IN THE STUFFING BOX AREA控制填料箱内区域的温度Suction recirculation, The recirculatio

6、n line is connected from the bottom of the stuffing box to the suction side of the pump (A).吸入在循环，循环管线从填料箱的底部连接到泵的吸入侧（） Jacketing fluid, The cooling or heating fluid flows through a jacket that is surrounding the stuffing box (B). 水套液体，冷却或加热液体从环绕填料箱（）的一个套中流过Barrier or buffer fluid, The fluid is circ

7、ulated between two seals either by convection or by a separate circulation system (E)屏蔽或缓冲器液体，液体在两个密封之间通过对流或单独的循环系统（）来循环4CONTROLLING THE TEMPERATURE IN THE STUFFING BOX AREA控制填料箱内区域的温度Quench, The fluid is passed between the seal and a disaster bushing that has been installed in the rear of the seal

8、gland (D). 窒息，液体通过密封之间，一个灾难性的轴衬被安装在密封压盖（）的后面中Flush, A liquid, from an outside source, is injected into the stuffing box at one atmosphere above stuffing box pressure and dilutes the product a small amount (C). 冲洗，从外界源的一个液体，在高出填料箱压力一个大气压的情况下注射到填料箱中，并且冲淡产品到很小的量（）Use two seals with a cool liquid circul

9、ating between them (E). A two way balanced cartridge seal would be an excellent choice. This arrangement provides cooling at the seal faces where it will often do the most good. 使用两个密封，并且在它们（）之间有冷却液体循环一个两位平衡筒式密封是一个很好的选择这个安排在密封面提供冷却，这里它将更有利益5CONTROLLING THE TEMPERATURE IN THE STUFFING BOX AREA控制填料箱内区

10、域的温度Use the jacketed stuffing box that came installed on the pump (figure B) or install one if it is missing. These jackets are available as a replacement part for the back plate on most popular pumps or as an after market bolt on accessory. To use the jacket properly:使用一个带套填料箱，它被安装在泵上（图），或它丢失安装一个这些

11、套是可利用的，因为在大多数通俗的泵上对后板有一个可以更换的部件，或者作为附件上的一个销售后市场螺钉来恰当的使用套Dead end the fluid you are trying to control. This means no lines in or out of the stuffing box except those used to circulate the jacketing fluid.你试图控制的液体是死头，没有管线进出填料箱，除了这些被使用的循环套液体Install a thermal bushing in the bottom of the stuffing box. C

12、arbon is a good choice because it is a poor conductor of heat compared to the metal pump components. A typical clearance over the shaft would be 0.002 inches per inch of shaft diameter ( 0,01 mm/mm of shaft diameter).在填料箱的底部安装一个热的轴衬碳是一个很好的选择，因为与金属泵的元件相比，它是热的不良导体在轴上通常的间隙为轴直径的每英寸.英寸（.mm/mm 轴的直径）6CONTR

13、OLLING THE TEMPERATURE IN THE STUFFING BOX AREA控制填料箱内区域的温度Circulate the heating or cooling fluid, through the jacket, to control the temperature. Six to eight gpm. (25 to 30 liters /min.) is typical of the amount of cool water needed to cool down heat transfer fluid to the point where it will stop c

14、oking and Viton O-rings will be acceptable. If your water is too hard you can substitute condensate or low pressure steam.用通过套的加热或冷却液体来控制温度到gpm(25到升分钟)是通常需要的冷却水的量，来冷却热传导液体到他将停止炼焦点和型圈可以接受的如果你的水太硬，你可以使用代替的冷凝物或低压蒸气7CONTROLLING THE TEMPERATURE IN THE STUFFING BOX AREA控制填料箱内区域的温度An A.P.I. Gland is availa

15、ble for most mechanical seals. The gland has several features to provide various functions. It can be used as: 一个压盖对于大多数密封都是可利用的压盖有几个特征来提供不同的功能，它能被使用为：A quench connection (Q) to provide heating, cooling, or to remove any vapors that might escape between the seal faces. Steam can be injected to lower

16、 the seal temperature in the event of a fire. In the event of a major seal failure, this quench connection can be used, in conjunction with the gland disaster bushing, to direct seal fluid leakage to point where it can be collected.阻封连接（Q）提供加热，冷却或去除一些蒸汽，它可能从密封面之间逃脱.在有火的情况下,蒸汽能够被注入来降低密封的温度.在一个密封故障的主要

17、事件中,这个阻封连接能够被使用,与压盖套筒联系,来直接密封液体泄漏到它能被收集的点8CONTROLLING THE TEMPERATURE IN THE STUFFING BOX AREA控制填料箱内区域的温度A flush connection (F) to provide clean fluid to the stuffing box or it can be used to vent the stuffing box and seal in a vertical pump application.一个冲洗连接(F)来提供清洁的液体到填料箱或它能被使用在垂直泵应用中对填料箱和密封的排气A

18、close fitting, non sparking, disaster bushing (DB) to provide shaft support in the event of a bearing failure or to protect personnel in the event of a massive seal failure一个精密装置,没有火花,故障轴衬(DB)在轴承故障中对轴提供支撑,或在一个大的密封故障中保护人员9CONTROLLING THE TEMPERATURE IN THE STUFFING BOX AREA控制填料箱内区域的温度Heat tape or tracing lines can be installed around the stuffing box to provide