JPH0353038Y2 - - Google Patents

Description

[Detailed description of the invention] Industrial application field The present invention relates to the blade wheel structure of a turbocharger.
In particular, it relates to the impeller structure of an odd number of turbochargers consisting of full blades and small blades.

Prior Art A turbocharger has a blade wheel 1 as shown in Fig. 3.
will be adopted. The impeller 1 is formed from a plurality of blades 2 arranged at predetermined pitches on the circumference. On the other hand, as shown in FIG. 4, the blade wheel 1 is also formed by interposing half blades 3 between a plurality of full blades 2.

If the half blades 3 are interposed when the total number of blades 2 is an even number, the total number of blades becomes an even number. Also, as shown in Fig. 5, the number of all the blades 2 is an odd number (for example, 5
Even in the case of 3 half blades (5 blades), the total number of blades becomes an even number (10 blades). Therefore, it is not possible to set the total number of blades to an odd number and interpose the half blades 3, and in the prior art, a device with an odd number of total blades and a half blade has not been adopted.

Problems to be Solved by the Invention The object of the present invention is to provide a blade wheel structure in which the total number of blades is an odd number and in which partial blades are interposed to increase the degree of freedom in blade pitch selection.

Means for Solving the Problems To solve this problem, the present invention provides a turbocharger in which an even number of partial blades, which are successively shorter in length and successively lower in height than the whole blades, are interposed between the odd number of blades. The impeller structure was used as a means for this purpose.

Embodiments Hereinafter, embodiments of the present invention will be described based on the drawings.

As shown in FIGS. 1 and 2, the impeller 1 has three blades 2 arranged at equal pitches on the circumference. Partial blades 4 having a length of about one-third of the total blade 2 and partial blades 5 having a length of about two-thirds of the total blade 2 are interposed at equal pitches between the blades 2. In addition, the blade heights of the partial blades are gradually lowered as the blade length becomes shorter. Therefore, as is clear from the figure, the total number of blades is an odd number (9) of three each of the total blade 2, the partial blade 4, and the partial blade 5. Partial blade 4
Since the combination of and the partial blade 5 can perform a function equivalent to the conventional half blade 3 (a blade approximately half the length of the whole blade), the above blade arrangement has a half blade 3. It becomes possible to form a blade wheel 1 that is almost similar to the conventional one.

Since the height of the partial blades gradually decreases, the air suction action can be performed without difficulty, and since the partial blades are successively shorter and lower in length and height, each partial blade can suck air easily. Capture efficiently.

In this embodiment, the total number of blades 2 is three, but of course other odd number blades may be used, and the partial blades 2 may be 1/2.
The present invention is not limited to the 3-length partial blade 4 and the 2/3-length partial blade 5.

Note that even when the total number of blades is an even number, partial blades as described above may be used, but this is not particularly necessary as the half blades 3 of the prior art are sufficient.

Effects of the Invention As is clear from the above explanation, according to the present invention, partial blades can be interposed in a blade having an odd number of total blades to form an odd number of blade wheels having partial blades.
The degree of freedom in selecting impeller pitch increases. In addition, since the height of the partial blades is gradually lowered, air can be sucked in easily, and each partial blade has the effect of efficiently capturing air.

[Brief explanation of the drawing]

Fig. 1 is a plan view of an embodiment of the present invention, Fig. 2 is a developed view of the blades along the circumferential direction of Fig. 1, Fig. 3 is a perspective view of a conventional turbocharger impeller, and Fig. 4 is a plan view of an embodiment of the present invention. FIG. 5 is a perspective view of a conventional impeller having half blades, and FIG. 5 is a developed view of the blades along the circumferential direction of FIG. 1... impeller, 2... full blade, 3... half blade, 4
...partial blade, 5...partial blade.

Claims (1)

[Scope of utility model registration request] In a turbocharger blade wheel structure formed by multiple full blades and half blades interposed between them,
An even number of partial blades having shorter lengths and lower blade heights than the total blades are interposed between the odd number of the total blades, so that the total number of blades is maintained at an odd number. Turbocharger blade wheel structure.