公开(公告)号：US5006043A

公开(公告)日：1991-04-09

申请号：US438111

申请日：1989-11-20

申请人： Shin Katsumata ,  Mark W. Corcoran

发明人： Shin Katsumata ,  Mark W. Corcoran

IPC分类号： F04D29/10 ,  F04D29/12 ,  F16J15/40 ,  F16J15/44

CPC分类号： F16J15/441 ,  F04D29/106 ,  F04D29/126 ,  F16J15/406

摘要： An aircraft fuel pump (1) is provided with a centrifugal impeller (2) and a stationary housing (3). A floating annular seal (4) mates with both the stationary housing and the rotating impeller thus providing sealing on two surfaces. The annular seal (4) comprises, in combination, a sealing material (5) positioned radially opposite the surface (6) of the impeller to be sealed, a backing ring (7) radially spaced from the sealing material for axially sealing against a surface (13) on a mating ring (15) of the stationary housing (3), and an elastomer (8) which is bonded to both the sealing material and the backing ring. The sealing material (5) is in the form of sealing material segments (9, 10, 11) which are arranged end to end with expansison grooves (12) remaining between the opposed ends for accommodating differences in thermal expansion between the impeller and the sealing material. The expansion grooves are in the form of a spiral to create a pumping action with relative rotation between the impeller and the sealing material to resist leakage of fuel through the expansion grooves.

摘要翻译： 飞机燃料泵（1）设置有离心式叶轮（2）和固定壳体（3）。 浮动环形密封件（4）与固定壳体和旋转叶轮配合，从而在两个表面上提供密封。 环形密封件（4）组合包括与要密封的叶轮的表面（6）径向相对的密封材料（5），与密封材料径向间隔开的用于轴向密封表面的背衬环（7） （13）位于固定壳体（3）的配合环（15）上，以及弹性体（8），其结合到密封材料和背衬环上。 密封材料（5）是密封材料段（9,10,11）的形式，其密封材料段（9,10,11）的端面与末端相对设置，以便容纳叶轮与密封件之间的热膨胀差异 材料。 膨胀槽是螺旋形的，以产生在叶轮和密封材料之间的相对转动的泵送作用，以防止燃料通过膨胀槽泄漏。