| 摘要 |
The turbine assembly of a fuel pump includes a pair of housings having an impeller disposed between the housings with a minimum clearance. In a first form, there is provided a spacer between the housings which can be crushed between a pair of press platens such that the combined depth of the spacer and recess in one of the housings receiving the impeller equals the depth of the impeller and the minimum clearance. In another form, the housings may be precisely located and laser-welded one to the other to provide the minimum clearance between the impeller and housings. In a third form, an annular spacer is disposed between the flat faces of the opposed housings and crushed to a predetermined depth such that the spacer depth equals the depth of the impeller and the minimum clearance.
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