| 摘要 |
A header plate assembly for a heat exchanger includes a plate (14) having a tube side and a tank side. A plurality of apertures (90) extends through the plate (14). Each aperture (90) has a first portion (92) on the tube side of the plate (14), the first portion (92) having a first cross-dimension, a nd a second portion (94) adjacent the first portion (92) and having a second cross-dimension that is smaller than the first cross-dimension, with a firs t shoulder (96) being formed between the first and second portions (92, 94). Each of a plurality of collars (72) has an aperture (74) extending therethr ough, with a portion of each collar (72) being received in the first portion (92) of one of the apertures (90) in the plate (14). A seal (86) is positio ned in each of the first portions (92) of the apertures (90) and between one of the collars (72) and one of the first shoulders (96). A plurality of fas teners (76) secures the collars (72) to the plate (14).
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