CN208138485U - Polymeric kettle stirs shaft sealer - Google Patents
Polymeric kettle stirs shaft sealer Download PDFInfo
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- CN208138485U CN208138485U CN201820654937.4U CN201820654937U CN208138485U CN 208138485 U CN208138485 U CN 208138485U CN 201820654937 U CN201820654937 U CN 201820654937U CN 208138485 U CN208138485 U CN 208138485U
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- stirring shaft
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- 238000003756 stirring Methods 0.000 title claims abstract description 34
- 238000007789 sealing Methods 0.000 claims abstract description 93
- 238000012856 packing Methods 0.000 claims abstract description 35
- 210000004907 gland Anatomy 0.000 claims abstract description 15
- 239000000463 material Substances 0.000 claims description 8
- 230000006835 compression Effects 0.000 claims description 7
- 238000007906 compression Methods 0.000 claims description 7
- 239000000945 filler Substances 0.000 claims description 4
- 229920002635 polyurethane Polymers 0.000 claims description 3
- 239000004814 polyurethane Substances 0.000 claims description 3
- 229920006361 Polyflon Polymers 0.000 claims 1
- 238000006116 polymerization reaction Methods 0.000 abstract description 20
- 238000002955 isolation Methods 0.000 abstract description 7
- 230000000694 effects Effects 0.000 description 7
- -1 polypropylene Polymers 0.000 description 4
- 229920000049 Carbon (fiber) Polymers 0.000 description 3
- 239000004917 carbon fiber Substances 0.000 description 3
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 3
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 3
- 239000004810 polytetrafluoroethylene Substances 0.000 description 3
- 239000011347 resin Substances 0.000 description 3
- 229920005989 resin Polymers 0.000 description 3
- 239000004743 Polypropylene Substances 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 239000010425 asbestos Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000005056 compaction Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 229920001971 elastomer Polymers 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000000178 monomer Substances 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- QQONPFPTGQHPMA-UHFFFAOYSA-N propylene Natural products CC=C QQONPFPTGQHPMA-UHFFFAOYSA-N 0.000 description 1
- 125000004805 propylene group Chemical group [H]C([H])([H])C([H])([*:1])C([H])([H])[*:2] 0.000 description 1
- 229910052895 riebeckite Inorganic materials 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000003746 surface roughness Effects 0.000 description 1
Landscapes
- Sealing Devices (AREA)
Abstract
本实用新型涉及密封结构技术领域，提供一种聚合釜搅拌轴密封装置，包括：箱体、密封轴套、搅拌轴、压盖、端盖和填料单元；所述箱体套设在搅拌轴上，所述密封轴套设置在箱体内壁，所述密封轴套与搅拌轴之间设置填料单元；其中，所述填料单元包括从下向上设置的至少一层J形密封圈和至少一层盘根填料；所述J形密封圈和盘根填料之间还设置隔离板；所述盘根填料上方设置端盖，所述端盖上方设置压盖；所述压盖通过调节螺柱和调节螺母与端盖连接；所述端盖固定在箱体上。本实用新型的密封圈结构紧凑、轴向尺寸小，密封性能可靠、使用寿命长。
The utility model relates to the technical field of sealing structures, and provides a sealing device for a stirring shaft of a polymerization kettle, comprising: a box body, a sealing shaft sleeve, a stirring shaft, a gland, an end cover and a packing unit; the box body is sleeved on the stirring shaft , the sealing sleeve is arranged on the inner wall of the box, and a packing unit is arranged between the sealing sleeve and the stirring shaft; wherein, the packing unit includes at least one layer of J-shaped sealing rings and at least one layer of discs arranged from bottom to top root packing; an isolation plate is set between the J-shaped sealing ring and the packing; an end cap is arranged above the packing, and a gland is arranged above the end cap; the gland is passed through an adjusting stud and an adjusting nut It is connected with the end cover; the end cover is fixed on the box body. The sealing ring of the utility model has the advantages of compact structure, small axial dimension, reliable sealing performance and long service life.
Description
技术领域technical field
本实用新型涉及密封结构技术领域，尤其涉及一种聚合釜搅拌轴密封装置。The utility model relates to the technical field of sealing structures, in particular to a sealing device for a stirring shaft of a polymerization kettle.
背景技术Background technique
聚合釜是聚丙烯生产的关键反应设备，主要用来实现丙烯单体的聚合反应。聚合釜主要由壳体、搅拌器和搅拌轴密封组成，其中搅拌轴密封则是聚合釜的关键部件。如果搅拌轴密封效果差，容易产生泄漏，进而影响聚合釜的使用。The polymerization kettle is the key reaction equipment for polypropylene production, mainly used to realize the polymerization reaction of propylene monomer. The polymerization kettle is mainly composed of a shell, an agitator and a stirring shaft seal, and the stirring shaft seal is a key part of the polymerization kettle. If the sealing effect of the stirring shaft is poor, leakage will easily occur, which will affect the use of the polymerization kettle.
过去为保证密封效果，常采用增加端盖压紧力和长填料箱密封结构，由于压紧力沿轴向分布不均匀，靠近端盖处的轴段磨损快，石棉织物盘根填料耐磨性差，经常处于“干运转”状态或盘根在压紧力作用下被挤出，造成检修频繁，使用寿命较短，并伴有一定量的泄漏。In the past, in order to ensure the sealing effect, the compression force of the end cover and the sealing structure of the long stuffing box were often used. Due to the uneven distribution of the compression force along the axial direction, the shaft section near the end cover wears quickly, and the wear resistance of the asbestos fabric packing is poor. , is often in a "dry running" state or the packing is squeezed out under the action of compaction force, resulting in frequent maintenance, short service life, and a certain amount of leakage.
实用新型内容Utility model content
本实用新型主要解决现有技术的聚合釜搅拌轴密封结构耐磨性差、使用寿命较短、容易产生泄漏等技术问题，提出一种聚合釜搅拌轴密封装置，密封圈结构紧凑、轴向尺寸小，能够提高聚合釜的密封效果，延长聚合釜的使用寿命。The utility model mainly solves the technical problems of poor wear resistance, short service life and easy leakage of the prior art's stirring shaft seal structure of the polymerization kettle, and proposes a stirring shaft sealing device of the polymerization kettle, the sealing ring has a compact structure and a small axial dimension , can improve the sealing effect of the polymerization kettle and prolong the service life of the polymerization kettle.
本实用新型提供了一种聚合釜搅拌轴密封装置，包括：箱体(3)、密封轴套(11)、搅拌轴(4)、压盖(5)、端盖(6)和填料单元；The utility model provides a stirring shaft sealing device for a polymerization kettle, comprising: a box body (3), a sealing shaft sleeve (11), a stirring shaft (4), a gland (5), an end cover (6) and a packing unit;
所述箱体(3)套设在搅拌轴(4)上，所述密封轴套(11)设置在箱体(3)内壁，所述密封轴套(11)与搅拌轴(4)之间设置填料单元；其中，所述填料单元包括从下向上设置的至少一层J形密封圈(10)和至少一层盘根填料(8)；所述J形密封圈(10)和盘根填料(8)之间还设置隔离板(9)；The box (3) is sleeved on the stirring shaft (4), the sealing sleeve (11) is arranged on the inner wall of the box (3), and the sealing sleeve (11) and the stirring shaft (4) A packing unit is set; wherein, the packing unit includes at least one layer of J-shaped sealing ring (10) and at least one layer of packing (8) arranged from bottom to top; the J-shaped sealing ring (10) and packing (8) is also provided with separating plate (9);
所述盘根填料(8)上方设置端盖(6)，所述端盖(6)上方设置压盖(5)；所述压盖(5)通过调节螺柱(1)和调节螺母(2)与端盖(6)连接；所述端盖(6)固定在箱体(3)上。An end cap (6) is arranged above the packing (8), and a gland (5) is arranged above the end cap (6); ) is connected with the end cover (6); the end cover (6) is fixed on the box body (3).
优选的，所述J形密封圈(10)的数量为2至5层。Preferably, the number of the J-shaped sealing rings (10) is 2 to 5 layers.
优选的，所述盘根填料(8)的数量为2至5层。Preferably, the number of the packing filler (8) is 2 to 5 layers.
优选的，所述密封轴套(11)中设置O形密封圈(7)，所述O形密封圈(7)与箱体(3)内壁接触。Preferably, an O-ring (7) is provided in the sealing sleeve (11), and the O-ring (7) is in contact with the inner wall of the box (3).
优选的，所述J形密封圈(10)唇形开口方向与气流方向相向设置。Preferably, the lip opening direction of the J-shaped sealing ring (10) is set opposite to the airflow direction.
优选的，所述J形密封圈(10)采用聚氨酯与聚四氟乙烯树脂改性材料制成。Preferably, the J-shaped sealing ring (10) is made of polyurethane and polytetrafluoroethylene resin modified materials.
优选的，所述端盖(6)通过压紧螺母和压紧螺柱固定在箱体(3)上。Preferably, the end cover (6) is fixed on the box body (3) through compression nuts and compression studs.
本实用新型提供的一种聚合釜搅拌轴密封装置，结构简单、拆装方便，采用隔离板将密封长度分为里外侧两段，与物料相邻较近的里侧一段使用具有唇形密封结构的J形密封圈抵抗物料中压(4MPa)，里侧唇形密封圈结构紧凑，轴向尺寸小，密封性能可靠，而且对机器的振动和密封轴的同轴度误差都有一定的适应性；与物料相邻较远的外侧一段使用碳素纤维编织成型的盘根填料装填，由于碳素纤维具有良好的耐磨性及自润滑性，保证了密封的稳定性和可靠性，密封效果好、使用寿命长，对轴的表面粗糙度和密封面的加工质量要求不高。同时，本实用新型能够在工作一段时间磨损后，可通过拧紧调节螺母来压紧压盖达到再次密封的效果。The utility model provides a mixing shaft sealing device for a polymerization kettle, which has a simple structure and is easy to disassemble and assemble. The sealing length is divided into two sections inside and outside by using an isolation plate, and the inside section adjacent to the material has a lip-shaped sealing structure. The unique J-shaped sealing ring resists the medium pressure of the material (4MPa). The inner lip-shaped sealing ring has a compact structure, small axial size, reliable sealing performance, and has certain adaptability to the vibration of the machine and the coaxiality error of the sealing shaft. ;The outer section farther away from the material is filled with carbon fiber woven packing. Because carbon fiber has good wear resistance and self-lubricating properties, the stability and reliability of the seal are guaranteed, and the sealing effect is good. , Long service life, low requirements on the surface roughness of the shaft and the processing quality of the sealing surface. At the same time, the utility model can tighten the adjusting nut to compress the gland to achieve the effect of re-sealing after being worn for a period of time.
附图说明Description of drawings
图1是本实用新型聚合釜搅拌轴密封装置的结构示意图。Fig. 1 is a schematic structural view of the sealing device for the stirring shaft of the polymerization kettle of the present invention.
附图标记：1、调节螺柱；2、调节螺母；3、箱体；4、搅拌轴；5、压盖；6、端盖；7、O形密封圈；8、盘根填料；9、隔离板；10、J形密封圈；11、密封轴套。Reference signs: 1. Adjusting stud; 2. Adjusting nut; 3. Box body; 4. Stirring shaft; 5. Gland; 6. End cap; 7. O-ring; 8. Packing; 9. Isolation plate; 10, J-shaped sealing ring; 11, sealing shaft sleeve.
具体实施方式Detailed ways
为使本实用新型解决的技术问题、采用的技术方案和达到的技术效果更加清楚，下面结合附图和实施例对本实用新型作进一步的详细说明。可以理解的是，此处所描述的具体实施例仅仅用于解释本实用新型，而非对本实用新型的限定。另外还需要说明的是，为了便于描述，附图中仅示出了与本实用新型相关的部分而非全部内容。In order to make the technical problems solved by the utility model, the adopted technical solutions and the achieved technical effects clearer, the utility model will be further described in detail below in conjunction with the accompanying drawings and embodiments. It can be understood that the specific embodiments described here are only used to explain the utility model, rather than limit the utility model. In addition, it should be noted that, for the convenience of description, only the part related to the present utility model is shown in the drawings but not the whole content.
图1是本实用新型聚合釜搅拌轴密封装置的结构示意图。如图1所示，本实用新型实施例提供的聚合釜搅拌轴密封装置，包括：箱体3、密封轴套11、搅拌轴4、压盖5、端盖6和填料单元；Fig. 1 is a schematic structural view of the sealing device for the stirring shaft of the polymerization kettle of the present invention. As shown in Figure 1, the sealing device for the stirring shaft of the polymerization kettle provided by the embodiment of the utility model includes: a box body 3, a sealing sleeve 11, a stirring shaft 4, a gland 5, an end cover 6 and a packing unit;
所述箱体3套设在搅拌轴4上，所述密封轴套11设置在箱体3内壁，所述密封轴套11与搅拌轴4之间设置填料单元；密封轴套11与箱体3之间为静密封，所述密封轴套11中设置O形密封圈7，所述O形密封圈7与箱体3内壁接触。O型密封圈7能够对密封轴套11和箱体3进行密封，O型密封圈7由橡胶制成。The box body 3 is sleeved on the stirring shaft 4, the sealing shaft sleeve 11 is arranged on the inner wall of the box body 3, and a packing unit is arranged between the sealing shaft sleeve 11 and the stirring shaft 4; the sealing shaft sleeve 11 and the box body 3 There is a static seal between them, and an O-ring 7 is arranged in the sealing sleeve 11 , and the O-ring 7 is in contact with the inner wall of the box body 3 . The O-shaped sealing ring 7 can seal the sealing shaft sleeve 11 and the box body 3, and the O-shaped sealing ring 7 is made of rubber.
其中，所述填料单元包括从下向上设置的至少一层J形密封圈10和至少一层盘根填料8；所述J形密封圈10和盘根填料8之间还设置隔离板9。所述J形密封圈10的数量视密封要求自行确定，通常为2至5层。所述盘根填料8的数量视密封要求自行确定，通常为2至5层。在本实施例中，选用三层J形密封圈10和四层盘根填料8。J形密封圈10带有弹簧箍以增加密封压力，使用时将唇形开口面向物料介质(里侧)，使J形密封圈10唇形开口的方向与气流方向相向设置。J形密封圈10采用聚氨酯与聚四氟乙烯树脂改性材料制成，J形密封圈10耐磨性好，还能抗挤压和抗撕裂；密封面磨损后具有自动弹性补偿功能。同时由于聚四氟乙烯树脂(PTEE)具有耐高温、优良的化学稳定性、耐腐蚀性及良好的抗老化能力等性能，密封可靠寿命长。Wherein, the packing unit includes at least one layer of J-shaped sealing ring 10 and at least one layer of packing 8 arranged from bottom to top; an isolation plate 9 is also arranged between the J-shaped sealing ring 10 and the packing 8 . The number of the J-shaped sealing ring 10 is determined by itself according to the sealing requirements, usually 2 to 5 layers. The quantity of the packing 8 is determined by itself according to the sealing requirements, usually 2 to 5 layers. In this embodiment, three layers of J-shaped sealing rings 10 and four layers of packing 8 are selected. The J-shaped sealing ring 10 has a spring hoop to increase the sealing pressure. During use, the lip-shaped opening faces the material medium (inside), so that the direction of the lip-shaped opening of the J-shaped sealing ring 10 is opposite to the airflow direction. The J-shaped sealing ring 10 is made of polyurethane and polytetrafluoroethylene resin modified materials. The J-shaped sealing ring 10 has good wear resistance, extrusion resistance and tear resistance; the sealing surface has an automatic elastic compensation function after wear. At the same time, because polytetrafluoroethylene resin (PTEE) has properties such as high temperature resistance, excellent chemical stability, corrosion resistance and good aging resistance, the seal is reliable and has a long service life.
所述盘根填料8上方设置端盖6，所述端盖6上方设置压盖5；所述压盖5通过调节螺柱1和调节螺母2与端盖6连接；所述端盖6通过压紧螺母和压紧螺柱固定在箱体3上。An end cap 6 is arranged above the packing 8, and a gland 5 is arranged above the end cap 6; the gland 5 is connected with the end cap 6 through an adjusting stud 1 and an adjusting nut 2; Tight nuts and hold-down studs are fixed on the casing 3.
本实用新型聚合釜搅拌轴密封装置的工作原理：为保证密封的可靠性，在整个密封长度方向，采用组合密封，用隔离板9将密封长度分为里侧外侧两段，把J形密封圈10安排于轴系里侧，形成第一级动密封；耐磨性及自润滑性优良的碳素纤维编织的盘根填料8置于J形密封圈10上方，形成第二级动密封。通过端盖6可调整填料压力，依靠端盖6轴向压力，可使填料径向变形，填满间隙。填料在径向变形时产生径向力，形成与搅拌轴4和密封轴套11内壁的紧密接触，实现密封。在聚合釜物料压力作用下，J形密封圈10开口可向两侧膨胀，分别紧密贴合搅拌轴4表面和密封轴套11内壁表面，形成一定的自密封作用。另外，本实用新型聚合釜搅拌轴密封装置最大优点是工作一段时间磨损后，可通过拧紧调节螺母2来压紧压盖5达到再次密封的目的。The working principle of the sealing device of the stirring shaft of the polymerization kettle of the utility model is: in order to ensure the reliability of the sealing, a combined sealing is adopted in the direction of the entire sealing length, and the sealing length is divided into two sections on the inner side and the outer side by the isolation plate 9, and the J-shaped sealing ring 10 is arranged on the inner side of the shafting to form a first-stage dynamic seal; carbon fiber braided packing 8 with excellent wear resistance and self-lubrication is placed above the J-shaped sealing ring 10 to form a second-stage dynamic seal. The packing pressure can be adjusted through the end cover 6, relying on the axial pressure of the end cover 6, the radial deformation of the packing can be made to fill the gap. When the packing is radially deformed, radial force is formed to form a close contact with the inner wall of the stirring shaft 4 and the sealing sleeve 11 to realize sealing. Under the action of the material pressure in the polymerization kettle, the opening of the J-shaped sealing ring 10 can expand to both sides, and respectively closely fit the surface of the stirring shaft 4 and the inner wall surface of the sealing sleeve 11 to form a certain self-sealing effect. In addition, the biggest advantage of the sealing device of the stirring shaft of the polymerization kettle of the utility model is that after working for a period of time and wearing out, the gland 5 can be tightened by tightening the adjusting nut 2 to achieve the purpose of sealing again.
本实用新型聚合釜搅拌轴密封装置的安装步骤：The installation steps of the sealing device of the stirring shaft of the polymerization kettle of the utility model:
1、把带有O形密封圈7的密封轴套11装在箱体3上，再装入轴，同时放置三层J形密封圈10，注意J形密封圈10唇形开口面向密封介质(向下方)并压上隔离板9。1. Install the sealing shaft sleeve 11 with the O-shaped sealing ring 7 on the box body 3, then install the shaft, and place three layers of J-shaped sealing rings 10 at the same time. Note that the lip-shaped opening of the J-shaped sealing ring 10 faces the sealing medium ( down) and press the isolation plate 9.
2、在隔离板9上填充四层盘根填料8，放置填料端盖6并拧紧压紧螺母。2. Fill four layers of packing 8 on the isolation plate 9, place the packing end cap 6 and tighten the compression nut.
3、盖上压盖5，并安装调节螺柱1和调节螺母2。密封装置工作一段时间后，若出现泄漏。可通过调整调节螺母2的松紧度，来调节密封圈的松紧。3. Cover the gland 5, and install the adjusting stud 1 and the adjusting nut 2. After the sealing device has been working for a period of time, if leakage occurs. The tightness of the sealing ring can be adjusted by adjusting the tightness of the adjusting nut 2.
最后应说明的是：以上各实施例仅用以说明本实用新型的技术方案，而非对其限制；尽管参照前述各实施例对本实用新型进行了详细的说明，本领域的普通技术人员应当理解：其对前述各实施例所记载的技术方案进行修改，或者对其中部分或者全部技术特征进行等同替换，并不使相应技术方案的本质脱离本实用新型各实施例技术方案的范围。Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present utility model, and are not intended to limit it; although the present utility model has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand : It modifies the technical solutions described in the foregoing embodiments, or replaces some or all of the technical features in an equivalent manner, and does not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the various embodiments of the present utility model.
Claims (7)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820654937.4U CN208138485U (en) | 2018-05-04 | 2018-05-04 | Polymeric kettle stirs shaft sealer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820654937.4U CN208138485U (en) | 2018-05-04 | 2018-05-04 | Polymeric kettle stirs shaft sealer |
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| CN208138485U true CN208138485U (en) | 2018-11-23 |
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| CN201820654937.4U Expired - Fee Related CN208138485U (en) | 2018-05-04 | 2018-05-04 | Polymeric kettle stirs shaft sealer |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110173566A (en) * | 2019-04-25 | 2019-08-27 | 湖南橡塑密封件厂有限公司 | Shafting seals adjustable wear-resisting durable device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110173566A (en) * | 2019-04-25 | 2019-08-27 | 湖南橡塑密封件厂有限公司 | Shafting seals adjustable wear-resisting durable device |
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