CN108361436A - 一种阀杆填料密封机构 - Google Patents
一种阀杆填料密封机构 Download PDFInfo
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- CN108361436A CN108361436A CN201810157164.3A CN201810157164A CN108361436A CN 108361436 A CN108361436 A CN 108361436A CN 201810157164 A CN201810157164 A CN 201810157164A CN 108361436 A CN108361436 A CN 108361436A
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- 238000012856 packing Methods 0.000 title claims abstract description 41
- 238000007789 sealing Methods 0.000 title claims abstract description 26
- 230000007246 mechanism Effects 0.000 title claims abstract description 16
- 239000000945 filler Substances 0.000 claims abstract description 77
- 230000013011 mating Effects 0.000 claims abstract description 10
- 239000000463 material Substances 0.000 claims description 6
- 239000002184 metal Substances 0.000 claims description 6
- 230000000694 effects Effects 0.000 abstract description 5
- 239000007769 metal material Substances 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000003566 sealing material Substances 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K5/00—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary
- F16K5/06—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary with plugs having spherical surfaces; Packings therefor
- F16K5/0663—Packings
- F16K5/0694—Spindle sealings
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K5/00—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary
- F16K5/06—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary with plugs having spherical surfaces; Packings therefor
- F16K5/0663—Packings
- F16K5/0673—Composite packings
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Details Of Valves (AREA)
- Lift Valve (AREA)
Abstract
本发明的阀杆填料密封机构,阀孔内壁设置有填料腔,填料腔内安置有填料,阀杆与填料配合部分是上端直径较小、下端直径较小的锥形,形成斜楔结构;填料分为多层,上层填料在截面上的底面与竖直方向的夹角小于下层填料在截面上的顶面与竖直方向的夹角;使得多层填料之间具有微小间隙,阀杆旋转开启阀门时受力向上挤压填料,多层填料之间的微小间隙为下层填料提供随阀杆向上位移的空间,减少填料对阀杆的摩擦阻力,金属材料的填料垫能防止阀杆与填料底层摩擦;阀杆旋转关闭阀门时上层填料随阀杆向下移动,同时产生挤压胀紧力,能够提高填料与阀杆的密封性能,开启阻力小,密封效果好,阀门开启方便,不易磨损。
Description
技术领域
本发明涉及一种阀杆填料密封机构。
背景技术
机械制造行业中的阀类产品常通过阀杆带动阀芯旋转来开启或关闭流体通道,阀杆与阀体之间需保持密封状态,一般采用填料密封在阀杆与阀体之间,传统阀类产品的阀杆填料密封性能不稳定,填料填充少时密封不可靠,填料填充过多时密封阻力大,开关摩擦力也大,阀门开启困难,填料与阀杆圆锥面配合部位的密封材料易磨损,影响密封效果。
发明内容
本发明所要解决的技术问题是,提供一种摩擦阻力小,开启方便,不易磨损的阀杆填料密封机构。
本发明的阀杆填料密封机构,包括阀体,阀体上阀孔内安装有阀杆,其特征在于:阀孔内壁设置有填料腔,填料腔内安置有填料,阀杆与填料配合部分是上端直径较小、下端直径较小的锥形,形成斜楔结构;
所述填料腔下端设置有能够为阀杆提供限位的填料垫;
所述填料分为多层,每层填料在截面上的顶面与竖直方向具有夹角,底面与竖直方向也具有夹角,上层填料在截面上的底面与竖直方向的夹角小于下层填料在截面上的顶面与竖直方向的夹角;
所述阀杆与填料配合部分锥度为1°~3°;上层填料在截面上的底面与竖直方向的夹角为85°~95°;下层填料在截面上的顶面与竖直方向的夹角为95°~105 °;
所述阀杆与填料配合部分锥度为1°;上层填料在截面上的底面与竖直方向的夹角为90°;下层填料在截面上的顶面与竖直方向的夹角为100°;
所述填料垫材料为金属。
本发明的阀杆填料密封机构,通过多层填料填充在填料腔内与阀杆配合密封,上层填料在截面上的底面与竖直方向的夹角小于下层填料在截面上的顶面与竖直方向的夹角,使得多层填料之间具有微小间隙,阀杆旋转开启阀门时受力向上挤压填料,多层填料之间的微小间隙为下层填料提供随阀杆向上位移的空间,减少填料对阀杆的摩擦阻力,金属材料的填料垫能防止阀杆与填料底层摩擦;阀杆旋转关闭阀门时上层填料随阀杆向下移动,同时产生挤压胀紧力,能够提高填料与阀杆的密封性能,开启阻力小,密封效果好,阀门开启方便,不易磨损。
附图说明
图1是本发明实施例的阀杆填料密封机构平面结构示意图;
图2是图1的局部放大示意图。
具体实施方式
如图所示,一种阀杆填料密封机构,包括阀体1,阀体1上阀孔内安装有阀杆 5,阀孔内壁设置有填料腔,填料腔内安置有填料,阀杆5与填料配合部分是上端直径较小、下端直径较小的锥形,形成斜楔结构,密封效果好。
填料腔下端设置有能够为阀杆5提供限位的填料垫2,填料垫2材料为金属,金属材料的填料垫能防止阀杆与填料底层摩擦。
填料分为多层,每层填料在截面上的顶面与竖直方向具有夹角,底面与竖直方向也具有夹角,上层填料在截面上的底面4与竖直方向的夹角小于下层填料在截面上的顶面3与竖直方向的夹角,使得多层填料之间具有微小间隙,阀杆旋转开启阀门时受力向上挤压填料,多层填料之间的微小间隙为下层填料提供随阀杆向上位移的空间,减少填料对阀杆的摩擦阻力;阀杆旋转关闭阀门时上层填料随阀杆向下移动,同时产生挤压胀紧力,能够提高填料与阀杆的密封性能。
阀杆与填料配合部分锥度范围在1°~3°之间;上层填料在截面上的底面与竖直方向的夹角范围在85°~95°之间;下层填料在截面上的顶面与竖直方向的夹角范围在95°~105°之间。
本实施例的阀杆与填料配合部分锥度选择1°;上层填料在截面上的底面与竖直方向的夹角选择90°;下层填料在截面上的顶面与竖直方向的夹角选择100°。
本发明的阀杆填料密封机构,通过多层填料填充在填料腔内与阀杆配合密封,上层填料在截面上的底面与竖直方向的夹角小于下层填料在截面上的顶面与竖直方向的夹角,使得多层填料之间具有微小间隙,阀杆旋转开启阀门时受力向上挤压填料,多层填料之间的微小间隙为下层填料提供随阀杆向上位移的空间,减少填料对阀杆的摩擦阻力,金属材料的填料垫能防止阀杆与填料底层摩擦;阀杆旋转关闭阀门时上层填料随阀杆向下移动,同时产生挤压胀紧力,能够提高填料与阀杆的密封性能,开启阻力小,密封效果好,阀门开启方便,不易磨损。
1.阀杆密封部分带有一个小锥度,在阀门介质力的作用下填料和阀杆间形成有个非常良好的密封
2.填料分上中下三种,带有不同的锥度,上下锥度的存在差值,阀杆和填料件的磨擦力会很小,从而保证了阀门开启力较小
3.一个金属填料垫有效的防止阀杆和下填料底面的摩擦。
Claims (6)
1.一种阀杆填料密封机构,包括阀体,阀体上阀孔内安装有阀杆,其特征在于:阀孔内壁设置有填料腔,填料腔内安置有填料,阀杆与填料配合部分是上端直径较小、下端直径较小的锥形,形成斜楔结构。
2.根据权利要求1所述阀杆填料密封机构,其特征在于:所述填料腔下端设置有能够为阀杆提供限位的填料垫。
3.根据权利要求1所述阀杆填料密封机构,其特征在于:所述填料分为多层,每层填料在截面上的顶面与竖直方向具有夹角,底面与竖直方向也具有夹角,上层填料在截面上的底面与竖直方向的夹角小于下层填料在截面上的顶面与竖直方向的夹角。
4.根据权利要求1所述阀杆填料密封机构,其特征在于:所述阀杆与填料配合部分锥度为1°~3°;上层填料在截面上的底面与竖直方向的夹角为85°~95°;下层填料在截面上的顶面与竖直方向的夹角为95°~105°。
5.根据权利要求1所述阀杆填料密封机构,其特征在于:所述阀杆与填料配合部分锥度为1°;上层填料在截面上的底面与竖直方向的夹角为90°;下层填料在截面上的顶面与竖直方向的夹角为100°。
6.根据权利要求1所述阀杆填料密封机构,其特征在于:所述填料垫材料为金属。
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Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5044606A (en) * | 1990-05-31 | 1991-09-03 | The United States Of America As Represented By The United States Department Of Energy | Valve stem and packing assembly |
US5601276A (en) * | 1996-02-12 | 1997-02-11 | Wordin; John J. | Retrofit valve stem seal assembly |
JP2002181197A (ja) * | 2000-12-15 | 2002-06-26 | Nippon Valqua Ind Ltd | グランドパッキンおよびこれを用いた密封装置 |
US20020121621A1 (en) * | 2001-03-05 | 2002-09-05 | Wordin John J. | Tractrix valve |
CN202252092U (zh) * | 2011-08-23 | 2012-05-30 | 上海凯工阀门有限公司 | 一种带有双径向轴承阀杆的球阀 |
-
2018
- 2018-02-24 CN CN201810157164.3A patent/CN108361436A/zh active Pending
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5044606A (en) * | 1990-05-31 | 1991-09-03 | The United States Of America As Represented By The United States Department Of Energy | Valve stem and packing assembly |
US5601276A (en) * | 1996-02-12 | 1997-02-11 | Wordin; John J. | Retrofit valve stem seal assembly |
JP2002181197A (ja) * | 2000-12-15 | 2002-06-26 | Nippon Valqua Ind Ltd | グランドパッキンおよびこれを用いた密封装置 |
US20020121621A1 (en) * | 2001-03-05 | 2002-09-05 | Wordin John J. | Tractrix valve |
CN202252092U (zh) * | 2011-08-23 | 2012-05-30 | 上海凯工阀门有限公司 | 一种带有双径向轴承阀杆的球阀 |
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