攪拌器和混合器的密封3

1、The sealing of mixers and agitators攪拌器和混合器的密封3Steven_Tianjin1Motion seals are different than pump seals:移動密封與泵的密封的不同處:Because of the misalignment potential they are almost always a stationary design. (The springs do not rotate with the shaft) 因為未對準的可能性,它們通常大部分是固定設計(彈簧不與軸旋轉)The inner seal should be b

2、alanced in both directions because many of these applications can fluctuate between pressure and vacuum. This feature will also prevent the inner seal from blowing open and allowing the barrier fluid to contaminate the product if you loose barrier fluid pressure between the seals. 內部密封應該在兩個方向上平衡,因為這

3、些應用能夠在正壓和真空之間波動.這個特征也將防止內部密封吹開和允許屏蔽液體污染產品,如果你在兩個密封之間損失屏蔽液體壓力2Motion seals are different than pump seals:移動密封與泵的密封的不同處:The rotating hard faces must be wider than normal to accommodate the excessive radial motion. A design movement of plus or minus 0.125 inches (3 mm) would be typical. 旋轉硬面必須比容忍過大徑向移動

4、的法線寬.一個加減0.125英寸的設計移動是典型的The internal clearances must be greater than pump seals to prevent contact during excessive radial movement. 內部間隙必須比泵的密封大,防止在過大徑向移動時的接觸3Motion seals are different than pump seals:移動密封與泵的密封的不同處:The stationary faces must be spring loaded in some manner to prevent loading one s

5、eal and unloading the other during periods of axial movement. The easiest way to do this is to spring load the faces together. 靜面必須在一些方式下的彈簧加載,來防止在軸向移動的期間內加載一個而卸載另外一個.做這個的最簡單的方法是用彈簧加載兩個面在一起Cartridge designs are necessary for correct and easy installation and to allow you to change seals without empt

6、ying the mixer in Side Entering and Bottom Entering applications. Be sure the seal has some sort of self aligning feature to compensate for misalignment caused by the set screws in the cartridge筒的設計對于正確和容易的安裝是必要的,并且允許你在側進和底進的應用中,不用排空混合器而進行密封的更換.確信密封有一些種類的自找正特性來補償由于在筒中設置螺釘引起的錯位4Motion seals are diffe

7、rent than pump seals:移動密封與泵的密封的不同處:Single split seals, mounted on a split sleeve have become very popular for mixer type applications (see the following illustration). The shaft movement can be partially stabilized by installing a split sleeve bearing in the stuffing box. A wide variety of materials

8、 are available for this split bearing. Check with your local distributor單獨分離密封,安裝在分離套上,對于混合器類型的應用(見以下圖示)已經變的非常普遍.軸的移動能通過在填料箱中安裝一個分離套軸承能夠部分的穩(wěn)定.對于這個分離軸承,一個很寬范圍的不同的材料可以利用.與你的本地分銷商聯(lián)系5Motion seals are different than pump seals:移動密封與泵的密封的不同處:The split seal is also a good choice for those mixers that have

9、a moveable shaft that seals a Teflon ring against the tank wall and allows you to change the seal without emptying the mixer. This is a major improvement over the original equipment design because you do not have to remove the shaft spool piece.這些分離密封對于這些混合器也是一個很好的選擇,這些混合器有一個移動的軸,它密封一個聚四氟乙烯環(huán)到罐壁,并且允許

10、你在沒有排空混合器的情況下更換密封.這是超過原始設備設計的主要的提高,因為你不需要移除軸的雙法蘭短節(jié)It should be obvious that when the spool piece is removed there is usually no force to hold the Teflon ring against the mixer wall.它將很明顯,當雙法蘭短節(jié)被移除時,這里通常沒有力來維持聚四氟乙烯環(huán)到罐壁6Motion seals are different than pump seals:移動密封與泵的密封的不同處:Bottom entering shafts cr

11、eate a different set of problems. Look at the following illustration:底部進入軸引起一個不同的設置問題,看下面的圖示Dirt and solids fall into the stuffing box and cannot be centrifuged out. Flushing liquid tends to channel through the solids and does a poor job of removing them from the stuffing box.污垢和固體進入填料箱,并且不能被離心甩出.沖洗

12、液體趨向于穿過固體的通道,并且對從填料箱中移除它們作了不好的工作7Motion seals are different than pump seals:移動密封與泵的密封的不同處:There are a couple of possible solutions.這里有幾個可能解決的方法:Cut off the stuffing box and move the seal into the vessel so that centrifugal force will throw the solids away from the flexible seal components切開填料箱并移動密封到容器中,這樣離心力將從柔軟的密封組件中移除固體Use a higher specific gravity fluid in the stuffing box to prevent gravity from pulling the solids into the seal area. A high density grease could be a