时尚汽车_汽车生活移动版

Referring to FIG. 3, shown therein is a blade track 300 configured in some respects similar to the blade track 100 illustrated and described above. However, the blade track 300 may include one or more attachment portions 302 that differ in certain respects relative to the attachment portions 104a, 104b of the blade track 100. As exemplarily shown in FIG. 3, the attachment portion 302 includes an extension region 304 and a coupling region 306 extending radially outward from the extension region 304 and defining a radially-facing outer surface 308. The extension region 304 is configured similar to the extension region 118 of the blade track 100. However, the radial dimension of the extension region 304 can vary in a circumferential direction. Additionally, the radially-facing outer surface 308 may be substantially planar in the circumferential direction as shown, and the radial dimension of the coupling region 306 may be substantially constant along the circumferential direction. Alternatively, the outer surface 308 may be curved in the circumferential direction similar to the configuration of the inner surface 108. Moreover, the axially-opposite mating surfaces 324 of the attachment portion 302 may have a substantially flat or planar form.

Referring now to FIG. 4, shown therein is a blade track 400 configured in some respects similar to the blade track 100 illustrated and described above. However, the blade track 400 includes a single attachment portion 402 as opposed to the pair of attachment portions 104a, 104b associated with the blade track 100. Generally, the attachment portion 402 is structured such that a midpoint thereof is spaced apart from the second axially-facing surface 114 of the segment body 106 along the axial direction by a distance x4, and is spaced apart from the first axially-facing surface 112 of the segment body 106 along the axial direction by a distance x5. Distance x4 may be the same as or different from (i.e., greater than or less than) distance x5. In general the total distance (x4+x5) is at least equal to the width of the tips of the corresponding turbine blades as defined by a chord length between the leading and trailing edges at the tip of the blade. Attachment portion 402 can include a transition region 404, an extension region 406, and a coupling region 408. Inclusion of the transition region 404 provides the attachment portion 402 with a width w2 at the radially-facing outer surface 110 of the segment body 106 along the axial direction. In one embodiment, width w2 is greater than one-half the axial dimension of the segment body 106 (i.e., the axial dimension from the first axially-facing surface 112 to the second axially-facing surface 114). Width w2 can be greater than, equal to or less than the dimension of attachment portion 402 at the radially-facing outer surface 110 of the segment body 106 along the circumferential direction (i.e., the circumferential length of the transition region 404 at its widest point). It should also be appreciated that the blade track 400 may include one or more other attachment portions, such as attachment portion 104, 302, 402 or the like.

Referring to FIG. 5, shown therein is a blade track 508 configured in some respects similar to the blade track 100 illustrated and described above. However, the blade track 500 includes an attachment portion 502 in addition to the attachment portion 104b. It should be appreciated, however, that one or more other attachment portions (i.e., including attachment portions 302 or 402) may be provided to replace or supplement attachment portion 104b and/or attachment portion 502. In the illustrated embodiment, the attachment portion 502 includes a transition region 504 and a side rail region 506 having a rail end 508. The transition region 504 can be provided as discussed above with respect to any of the transition regions 116 or 404. In the illustrated embodiment, the side rail region 506 extends both radially outward from the radially-facing outer surface 110 and axially toward the second axially-facing surface 114 such that the rail end 588 faces the same direction as the second axially-facing surface 114. However, in another embodiment, the side rail region 506 may extend such that the rail end 508 faces the same direction as the first axially-facing surface 112. Constructed as exemplarily described above, the attachment portion 502 is structured to slidably engage (i.e., along the axial direction) a tab, bracket or stub of a hanger to help secure the blade track 500 within a blade track assembly of a gas turbine engine. By providing the attachment portion 502, differences in thermal expansion characteristics between the blade track 500 (a CMC component) and a hanger (typically a metal component) can be accommodated to eliminate or otherwise reduce stresses arising from the differential expansion/contraction of the hanger relative to the blade track 500.