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1. 发明授权

US6142478A Gas lubricated slow speed seal 失效
标题翻译：气体润滑慢速密封
公开(公告)号：US6142478A
公开(公告)日：2000-11-07
申请号：US20493
申请日：1998-02-06
申请人： Glenn G. Pecht , John P. Czubek , Ralph P. Gabriel , Anca Vasilache , Robert Peter Rieger , James R. Wasser
发明人： Glenn G. Pecht , John P. Czubek , Ralph P. Gabriel , Anca Vasilache , Robert Peter Rieger , James R. Wasser
IPC分类号： F16J15/34 , F16J15/54
CPC分类号： F16J15/3484 , F16J15/3412
摘要： A contacting mechanical end face seal for use in applications having slow shaft rotational speeds, such as mixers, agitators and reactors, includes at least one seal ring having a face with spiral grooves. Both hydrostatic and hydrodynamic lift characteristics in the seal are utilized to generate and maintain a seal gap having sufficient stiffness to prevent contact of the seal ring faces during operation. Specific characteristics, or combinations of them, include a land to groove ratio between 0.2-0.9, tapered groove surfaces which are inclined from the O.D. toward the dam, groove area to land area ratios greater than 1.5, a stepped groove having a greater depth at the O.D. relative to the depth adjacent the dam, alternating deep and shallow grooves, and groove area to dam area ratio in the interface greater than 1.2. Disposing the grooves in the axially movable primary ring and providing a greater sealing area for the opposing mating ring seal face limits angular load imbalance in the seal by maintaining the grooved area within the seal interface. The seal may be utilizable in both single or dual seal arrangements.
摘要翻译：用于具有慢轴转速的应用中的接触机械端面密封件，例如混合器，搅拌器和反应器，包括至少一个具有带螺旋槽的面的密封环。密封件中的静水压力和液压动力提升特性都用于产生和保持具有足够刚度的密封间隙，以防止在操作过程中密封环面接触。具体特征或它们的组合包括：0.2-0.9之间的凹槽与凹槽之间的比例，从O.D.倾斜的锥形槽表面。朝向坝，槽面积与陆地面积比大于1.5，在O.D.具有较大深度的阶梯槽。相对于与坝相邻的深度，交替的深浅沟槽，沟槽面积与坝面积之比在界面大于1.2。将凹槽布置在可轴向移动的主环中并为相对的配合环密封面提供更大的密封面，从而通过将开槽区域保持在密封界面内来限制密封件中的角荷载不平衡。密封件可以在单个或双重密封装置中使用。

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