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1. 发明授权

US06299173B1 Mechanical end face seal ring having a compliant seal face 有权
标题翻译：机械端面密封环，具有柔顺密封面
公开(公告)号：US06299173B1
公开(公告)日：2001-10-09
申请号：US09415845
申请日：1999-10-12
申请人： Wei-Tang Lai
发明人： Wei-Tang Lai
IPC分类号： F16J1534
CPC分类号： F16J15/3468 , F16J15/3472
摘要： A mechanical end face seal includes one seal ring having two elements, a seal face extension portion immediately adjacent a sealing face and a seal ring body removed from the sealing face. Each of the ring elements has a radial outer diameter dimension and a radial inner dimension. The seal face extension portion is defined by an annular gap separating the seal ring body from the seal face extension portion. The annular gap opens out onto the high-pressure side of the seal. The axial thickness of the seal face extension portion is much smaller than the radial dimension of the sealing face. The seal face extension portion is connected to the thicker seal ring body by means of a thin connecting “neck”, which has a small radial dimension than the radial dimension of the sealing face. Preferably, the radial dimension of the neck has a ratio relative to the radial width of the ring sealing face between about 0.10 to about 0.70, more preferably about 0.25 to about 0.60, and most preferably about 0.35 to about 0.45. The relative ratio of the axial thickness of the seal face extension portion to the radial width of the second sealing face is in a preferable range of from about 0.03 to about 0.60, in a more preferable range of from about 0.05 to about 0.50, and in an optimal range of from about 0.08 to about 0.15.
摘要翻译：机械端面密封件包括具有两个元件的一个密封环，紧邻密封面的密封面延伸部分和从密封面移除的密封环体。每个环形元件具有径向外径尺寸和径向内部尺寸。密封面延伸部分由将密封环体与密封面延伸部分分开的环形间隙限定。环形间隙打开到密封件的高压侧。密封面延伸部分的轴向厚度远小于密封面的径向尺寸。密封面延伸部分通过薄的连接“颈部”连接到较厚的密封环体，颈部的径向尺寸小于密封面的径向尺寸。优选地，颈部的径向尺寸相对于环密封面的径向宽度的比率在约0.10至约0.70之间，更优选约0.25至约0.60，最优选约0.35至约0.45。密封面延伸部的轴向厚度与第二密封面的径向宽度的相对比在约0.03至约0.60的优选范围内，更优选的范围为约0.05至约0.50，并且在约0.08至约0.15的最佳范围。

2. 发明授权

US07377518B2 Mechanical seal ring assembly with hydrodynamic pumping mechanism 有权
标题翻译：机械密封环总成与水力泵送机构
公开(公告)号：US07377518B2
公开(公告)日：2008-05-27
申请号：US11100728
申请日：2005-04-07
申请人： Wei-Tang Lai
发明人： Wei-Tang Lai
IPC分类号： F16J15/34
CPC分类号： F16J15/3412 , F16J15/3408
摘要： A seal ring configuration adapted to be disposed about a shaft to seal a fluid at a pressure differentials across the seal. The seal ring configuration comprises a mating ring and an axially movable primary ring. The primary ring includes a seal face in opposing relationship to the mating ring seal face to define a seal interface. The mating ring seal face or the primary ring seal face defines an annular axially recessed section and a dam section. The recessed section is axially disposed further from the cooperating seal face relative to the dam section. The axially recessed section further includes a face pattern axially spaced further from the dam section than the recessed portion and is capable of generating a hydrodynamic force between the mating ring seal face and the primary ring seal face.
摘要翻译：一种密封环构造，其适于围绕轴布置以在跨过密封件的压力差下密封流体。密封圈构造包括配合环和可轴向移动的主环。主环包括与配合环密封面相对的密封面，以限定密封界面。配合环密封面或主环密封面限定环形轴向凹陷部分和坝段。所述凹陷部分相对于所述阻挡部分远离所述协作密封面进一步轴向设置。轴向凹入部分还包括一个与凹槽部分比凹部更远离的表面图案，并且能够在配合环密封面和主环密封面之间产生流体动力。

3. 发明授权

US5201531A Face seal with double spiral grooves 失效
标题翻译：双面螺旋槽面密封
公开(公告)号：US5201531A
公开(公告)日：1993-04-13
申请号：US862463
申请日：1992-04-02
申请人： Wei-Tang Lai
发明人： Wei-Tang Lai
IPC分类号： F16J15/34
CPC分类号： F16J15/3412
摘要： A mechanical face seal for a high speed, rotary fluid pressure device comprising rotating and stationary seal rings disposed in a housing and having confronting radial seal faces normally biased into engagement with one another. Oppositely inclined sets of spiral grooves are formed in the seal face of one ring, one set functioning to pump fluid from the reservoir downstream between the seal faces, and the other set functioning to pump fluid between the faces upstream back toward the reservoir. Each downstream pumping groove preferably intersects only one upstream pumping groove. Fluid pressure between the faces forms a gap therebetween, and the reversely inclined groove construction minimizes fluid loss or leakage.

4. 发明授权

US5938206A Pressure responsive primary ring for a non-contacting mechanical end face seal 失效
标题翻译：用于非接触式机械端面密封件的压力响应型主环
公开(公告)号：US5938206A
公开(公告)日：1999-08-17
申请号：US889252
申请日：1997-07-10
申请人： Gregory E. Klosterman , Wei Tang Lai , James R. Wasser
发明人： Gregory E. Klosterman , Wei Tang Lai , James R. Wasser
IPC分类号： F16J15/34 , F16J15/40
CPC分类号： F16J15/3468 , F16J15/3472 , F16J15/3484
摘要： A mechanical end face seal of the non-contacting type includes a primary seal ring having a back section, a seal face section and a middle section between the seal face and the back sections, each primary ring section having a radial dimension, defined as the difference between the outermost radius and the innermost radius of said respective section, the radial dimension of the back section being in a ratio relative to said middle section of between about 1.5 to about 3.1, and more preferably of between about 1.9 to about 2.5, and most preferably about 2.0 to about 2.3. Additionally, the mating seal ring includes grooves extending from one seal ring circumference toward the other and terminating adjacent a dam at a radius R.sub.g, it is beneficial to have the boundary between the grooves and the dam have a radius R.sub.g slightly larger or smaller, within about 10%, than the outer radius of the middle section.
摘要翻译：非接触型的机械端面密封件包括主密封环，其具有后部，密封面部分和密封面与后部部分之间的中间部分，每个主环部分具有径向尺寸，被定义为所述相应部分的最外半径和最内半径之间的差异，所述后部的径向尺寸相对于所述中间部分的比例在约1.5至约3.1之间，更优选在约1.9至约2.5之间，并且最优选约2.0至约2.3。此外，配合密封环包括从一个密封环圆周朝向另一个密封环圆周延伸并且以半径Rg在坝附近终止的凹槽，有利的是使凹槽和坝之间的边界具有稍微更大或更小的半径Rg 约10％，比中间部分的外半径。

5. 发明授权

US5071141A Spiral groove seal arrangement for high vapor-pressure liquids 失效
标题翻译：用于高蒸汽压力液体的螺旋槽密封装置
公开(公告)号：US5071141A
公开(公告)日：1991-12-10
申请号：US553570
申请日：1990-07-17
申请人： Wei-Tang Lai , Glenn G. Pecht
发明人： Wei-Tang Lai , Glenn G. Pecht
IPC分类号： F16J15/34
CPC分类号： F16J15/3412
摘要： A seal system is disclosed for sealing a housing and rotatable shaft against leakage of high vapor-pressure liquids such as natural gas. The method of sealing comtemplates phase change of the liquefied hydrocarbon fluid across a first module. The gas so formed is contained by a second seal module which operates as a dry running gas seal. The seal system has plural, axially spaced spiral-groove seal modules mounted between the shaft and housing. Each seal module has a primary ring affixed to the housing and a mating ring affixed for rotation with the shaft and the modules define an intermediate cavity. The rings have opposed, radially extending faces, one of which has a plurality of downstream pumping spiral grooves extending from one circumference. The grooves of the grooved ring of the upstream module have a pattern which upon shaft rotation creates shear heating of the liquefied hydrocarbon fluid. The pattern has a land/groove surface area ratio greater than one and preferably a ratio of approximately three. The dam portion relative to groove portion surface area is also preferably greater than one and the preferred dam/groove ratio is approximately three.

6. 发明申请

US20050263963A1 Mechanical seal ring assembly with hydrodynamic pumping mechanism 有权
标题翻译：机械密封环总成与水力泵送机构
公开(公告)号：US20050263963A1
公开(公告)日：2005-12-01
申请号：US11100728
申请日：2005-04-07
申请人： Wei-Tang Lai
发明人： Wei-Tang Lai
IPC分类号： F16J15/34 , F16J15/42
CPC分类号： F16J15/3412 , F16J15/3408
摘要： A seal ring configuration adapted to be disposed about a shaft to seal a fluid at a pressure differentials across the seal. The seal ring configuration comprises a mating ring and an axially movable primary ring. The primary ring includes a seal face in opposing relationship to the mating ring seal face to define a seal interface. The mating ring seal face or the primary ring seal face defines an annular axially recessed section and a dam section. The recessed section is axially disposed further from the cooperating seal face relative to the dam section. The axially recessed section further includes a face pattern axially spaced further from the dam section than the recessed portion and is capable of generating a hydrodynamic force between the mating ring seal face and the primary ring seal face.
摘要翻译：一种密封环构造，其适于围绕轴布置以在跨过密封件的压力差下密封流体。密封圈构造包括配合环和可轴向移动的主环。主环包括与配合环密封面相对的密封面，以限定密封界面。配合环密封面或主环密封面限定环形轴向凹陷部分和坝段。所述凹陷部分相对于所述阻挡部分远离所述协作密封面进一步轴向设置。轴向凹入部分还包括一个与凹槽部分比凹部更远离的表面图案，并且能够在配合环密封面和主环密封面之间产生流体动力。

7. 发明授权

US5681047A Pressure responsive primary ring geometry for a non-contacting mechanical end face seal 失效
标题翻译：用于非接触机械端面密封件的压力响应主环几何形状
公开(公告)号：US5681047A
公开(公告)日：1997-10-28
申请号：US743012
申请日：1996-11-01
申请人： Gregory E. Klostermann , Wei-Tang Lai , James R. Wasser
发明人： Gregory E. Klostermann , Wei-Tang Lai , James R. Wasser
IPC分类号： F16J15/34
CPC分类号： F16J15/3484 , F16J15/3468 , F16J15/3472
摘要： A mechanical end face seal of the non-contacting type includes a primary seal ring having a back section, a seal face section and a middle section between the seal face and the back sections, each primary ring section having a radial dimension, defined as the difference between the outermost radius and the innermost radius of said respective section, the radial dimension of the back section being in a ratio relative to said middle section of between about 1.8 to about 2.8, and more preferably of between about 1.9 to about 2.5, and most preferably about 2.0 to about 2.3. Additionally, the mating seal ring includes grooves extending from one seal ring circumference toward the other and terminating adjacent a dam at a radius R.sub.g, it is beneficial to have the boundary between the grooves and the dam have a radius R.sub.g slightly larger or smaller, within about 10%, than the outer radius of the middle section.
摘要翻译：非接触型的机械端面密封件包括主密封环，其具有后部，密封面部分和密封面与后部部分之间的中间部分，每个主环部分具有径向尺寸，被定义为所述相应部分的最外半径和最内半径之间的差异，所述后部的径向尺寸相对于所述中间部分的比例在约1.8至约2.8之间，更优选在约1.9至约2.5之间，并且最优选约2.0至约2.3。此外，配合密封环包括从一个密封环圆周朝向另一个密封环圆周延伸并且以半径Rg在坝附近终止的凹槽，有利的是使凹槽和坝之间的边界具有稍微更大或更小的半径Rg 约10％，比中间部分的外半径。

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