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公开(公告)号：US5013227A
公开(公告)日：1991-05-07
申请号：US434044
申请日：1989-11-07
CPC分类号： F04C23/001 , F01C21/102 , F04C2230/60 , F05B2230/60 , Y10T29/49236 , Y10T29/49242 , Y10T403/7056 , Y10T403/7069
摘要： The pump comprises a stator constituted by an alternating sucession of stator plates (22) and stator rings (21) defining a sequence of compression chambers (20), and a rotor assembly comprising two shafts (24, 25) each having a compression lobe (28) in each of the compression chambers (20), with the compression lobes being placed on and fixed to their shafts during assembly of the pump, thereby enabling the axial clearance between each lobe and the adjacent stator plate to be individually adjusted, with each lobe being constituted by a body (29) and a clamping plate (30) which is fixed to the body by screws (34) which compress a set of two conical rings (32, 33), one of which (33) penetrates into the other while being compressed radially, thereby fixing the lobe in place. The assembly melthod consists in using a assembly plate (23) having a portion of extra thickness j penetrating into the stator ring over a distance corresponding to the desired clearance between the lobes and the stator plate (22). The lobes are positioned angularly by means of rods (45) and they are positioned axially by thrusting them against the assembly plate (23) by means of assembly screws (48). Once this has been done, the lobes are fixed to their shafts by tightening the clamping screws (34) which compress the conical rings (32, 33) causing them to clamp against the shaft.
摘要翻译： 所述泵包括由定子板（22）和限定一系列压缩室（20）的定子环（21）构成的定子，以及包括两个轴（24,25）的转子组件，每个轴具有压缩叶片 每个压缩室（20）中的压缩室（28），其中压缩凸起在泵的组装期间被放置在其轴上并固定到它们的轴上，从而能够单独调节每个凸角和相邻的定子板之间的轴向间隙 叶片由主体（29）和夹板（30）构成，夹板通过螺钉（34）固定到主体上，该螺钉（34）压缩一组两个锥形环（32,33），其中一个（33） 其它同时被径向地压缩，从而将叶片固定在适当位置。 组件熔化方法包括使用具有额外厚度j的一部分穿过定子环的一部分的组装板（23），该距离对应于叶片和定子板（22）之间的期望间隙。 叶片通过杆（45）成角度地定位，并且它们通过借助于组装螺钉（48）将它们推向组装板（23）而轴向定位。 一旦这样做了，瓣通过拧紧压紧锥形环（32,33）的夹紧螺钉（34）固定到它们的轴上，使得它们被夹紧在轴上。
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公开(公告)号：US4990069A
公开(公告)日：1991-02-05
申请号：US432428
申请日：1989-11-06
CPC分类号： F04C27/009
摘要： A multistage Roots-type vacuum pump comprising: a rotor defining a plurality of successive compression chambers (5) which are axially separated from one another by intermediate plates (1); a rotor assembly disposed inside the stator and constituted by two parallel shafts (8, 9) supported by bearings (11, 12) in end plates (2, 3) of the stator, each shaft (8, 9) being fitted inside each chamber (5) with a compression lobe (13, 14) such that each chamber thus contains two conjugate compression lobes; a motor (15) for driving one (8) of the two shafts in rotation, with the other shaft being driven in the opposite direction by gearing (17-18) situated in a housing (6) fixed to the corresponding end plate (2) of the stator, with each of the shafts passing through the end plate via a corresponding lip seal (19, 20); wherein a sealing module (24) is interposed between the end plate (2) situated adjacent to the housing (6) and the compression chamber adjacent to the housing, the module (24) comprising a partition around each of the shafts (8, 9) and fitted with the fixed portion (25, 26) of a corresponding labyrinth seal, with each shaft being provided with the moving complementary portion (27, 28) of the labyrinth seal, the moving portions of the labyrinth seals being situated in a common cavity (31) of the module, which cavity is connected via a non-return valve (32, 33) to the delivery channel (23) from the compression chamber adjacent to the housing, the valve allowing fluid to flow from the cavity (31) into the delivery channel.
摘要翻译： 一种多级罗茨式真空泵，包括：限定多个连续压缩室（5）的转子，其通过中间板（1）彼此轴向分离; 转子组件，其设置在所述定子内部并且由在所述定子的端板（2,3）中的轴承（11,12）支撑的两个平行轴（8,9）构成，每个轴（8,9）装配在每个室 （5）具有压缩凸角（13,14），使得每个室因此包含两个共轭压缩凸角; 用于驱动两个轴中的一个（8）旋转的电机（15），另一个轴通过位于固定到相应端板（2）的壳体（6）中的齿轮（17-18）沿相反方向驱动 ），每个轴通过相应的唇形密封件（19,20）穿过端板; 其中密封模块（24）插入位于邻近壳体（6）的端板（2）和邻近壳体的压缩室之间，模块（24）包括围绕每个轴（8,9）的分隔件 ）并配有相应的迷宫式密封件的固定部分（25,26），每个轴上设有迷宫式密封件的移动互补部分（27,28），迷宫式密封件的移动部分位于共同的 模块的空腔（31），该空腔通过止回阀（32,33）从邻近壳体的压缩室连接到输送通道（23），阀允许流体从空腔（31）流出 ）进入送货渠道。
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