Two-sided compressor wheel of fluid compression device and manufacturing method thereof

Abstract

A two-sided compressor wheel of a fluid compression device includes a first wheel part and a second wheel part. The first wheel part has a plurality of first blades. A first through hole is formed on the first wheel part along a rotation axis, and a first cavity is formed at a bottom of the first wheel part. The second wheel part has a plurality of second blades. A second through hole is formed on the second wheel part along the rotation axis, and communicated with the first through hole. Wherein, the bottom of the first wheel part is connected to a bottom of the second wheel part.

What is claimed is: 
     
         1 . A two-sided compressor wheel of a fluid compression device, comprising:
 a first wheel part having a plurality of first blades, a first through hole being formed on the first wheel part along a rotation axis, and a first cavity being formed at a bottom of the first wheel part;   a second wheel part having a plurality of second blades, a second through hole being formed on the second wheel part along the rotation axis and communicated with the first through hole;   wherein the bottom of the first wheel part is connected to a bottom of the second wheel part.   
     
     
         2 . The two-sided compressor wheel of  claim 1 , wherein the first cavity is communicated with the first through hole, and a radial size of the first cavity is greater than a radial size of the first through hole. 
     
     
         3 . The two-sided compressor wheel of  claim 1 , wherein the first cavity is not communicated with the first through hole. 
     
     
         4 . The two-sided compressor wheel of  claim 1 , wherein a second cavity is formed at the bottom of the second wheel part. 
     
     
         5 . The two-sided compressor wheel of  claim 4 , wherein the second cavity is communicated with the second through hole, and a radial size of the second cavity is greater than a radial size of the second through hole. 
     
     
         6 . The two-sided compressor wheel of  claim 4 , wherein the second cavity is not communicated with the second through hole. 
     
     
         7 . The two-sided compressor wheel of  claim 1 , wherein at least one first positioning structure is formed at the bottom of the first wheel part, at least one second positioning structure is formed at the bottom of the second wheel part and corresponding to the at least one first positioning structure, the at least one second positioning structure is engaged with the at least one first positioning structure. 
     
     
         8 . The two-sided compressor wheel of  claim 7 , wherein the at least one first positioning structure is protruded from the bottom of the first wheel part. 
     
     
         9 . The two-sided compressor wheel of  claim 7 , wherein the at least one first positioning structure is recessed from the bottom of the first wheel part. 
     
     
         10 . The two-sided compressor wheel of  claim 1 , further comprising a welding material layer connected between the bottom of the first wheel part and the bottom of the second wheel part. 
     
     
         11 . A method for manufacturing a two-sided compressor wheel of a fluid compression device, comprising:
 providing a first wheel part, wherein the first wheel part has a plurality of first blades, a first through hole is formed on the first wheel part along a rotation axis, and at least one first cavity is formed at a bottom of the first wheel part;   providing a second wheel part, wherein the second wheel part has a plurality of second blades, a second through hole is formed on the second wheel part along the rotation axis and communicated with the first through hole; and   connecting the bottom of the first wheel part to a bottom of the second wheel part.   
     
     
         12 . The manufacturing method of  claim 11 , wherein a first positioning structure is formed at the bottom of the first wheel part, a second positioning structure is formed at the bottom of the second wheel part and corresponding to the first positioning structure, the manufacturing method further comprises engaging the second positioning structure with the first positioning structure. 
     
     
         13 . The manufacturing method of  claim 11 , wherein the bottom of the first wheel part is directly welded to the bottom of the second wheel part. 
     
     
         14 . The manufacturing method of  claim 11 , the bottom of the first wheel part is welded to the bottom of the second wheel part through a welding material.