Turbine

Abstract

A turbine, including: a volute and an impeller. The volute includes: a volute gas inlet, a volute gas feeding flow passage, and a volute gas outlet. The impeller includes: blades, an impeller gas feeding flow passage, an impeller gas inlet, an impeller gas outlet, and a partition plate. The impeller gas feeding flow passage includes: an inner flow passage and an outer flow passage. The impeller is disposed inside the volute. The blades are disposed on an outer part of the impeller. The partition plate is circumferentially disposed between the impeller gas inlet and the impeller gas outlet. The partition plate divides the impeller gas feeding flow passage into the inner flow passage and the outer flow passage.

The invention claimed is: 
     
         1 . A turbine, comprising:
 a) a volute, the volute comprising: a volute gas inlet, a volute gas feeding flow passage, and a volute gas outlet; and   b) an impeller, the impeller comprising: blades, an impeller gas feeding flow passage, an impeller gas inlet, an impeller gas outlet, and a partition plate; the impeller gas feeding flow passage comprising an inner flow passage and an outer flow passage;   
       wherein
 the impeller is disposed inside the volute; 
 the blades are disposed on an outer part of the impeller; 
 the partition plate is circumferentially disposed between the impeller gas inlet and the impeller gas outlet; and 
 the partition plate divides the impeller gas feeding flow passage into the inner flow passage and the outer flow passage. 
 
     
     
         2 . The turbine of  claim 1 , wherein
 the volute gas feeding flow passage comprises a middle partition, and the middle partition divides the volute gas feeding flow passage into a left flow passage and a right flow passage;   the left flow passage communicates with the inner flow passage; and   the right flow passage communicates with the outer flow passage.   
     
     
         3 . The turbine of  claim 2 , wherein
 the left flow passage comprises a gas outlet of the left flow passage in the vicinity of the impeller;   the right flow passage comprises a gas outlet of the right flow passage in the vicinity of the impeller;   the inner flow passage comprises a gas inlet of the inner flow passage corresponding to the gas outlet of the left flow passage; and   the outer flow passage comprises a gas inlet of the outer flow passage corresponding to the gas outlet of the right flow passage.   
     
     
         4 . The turbine of  claim 3 , wherein a ratio of a width W1 of the gas inlet of the inner flow passage to a width W2 of the gas inlet of the outer flow passage is between 0.1 and 10. 
     
     
         5 . The turbine of  claim 4 , wherein the inner flow passage is a radial inflow channel. 
     
     
         6 . The turbine of  claim 4 , wherein the inner flow passage is a Francis channel. 
     
     
         7 . The turbine of  claim 4 , wherein the outer flow passage is a radial inflow channel. 
     
     
         8 . The turbine of  claim 4 , wherein the outer flow passage is a Francis channel. 
     
     
         9 . The turbine of  claim 4 , wherein a ratio of a width W3 of the gas outlet of the inner flow passage to a width W4 of the gas outlet of the outer flow passage is between 0.1 and 10. 
     
     
         10 . The turbine of  claim 9 , wherein the blade comprises inner blades correspondingly disposed inside the inner flow passage and outer blades correspondingly disposed inside the outer flow passage. 
     
     
         11 . The turbine of  claim 10 , wherein a ratio of a number of the inner blades to a number of the outer blades is between 0.2 and 6. 
     
     
         12 . The turbine of  claim 11 , wherein
 an adjustable valve is disposed inside the left flow passage in the vicinity of the volute gas inlet; and   the adjustable valve is connected to a control mechanism.   
     
     
         13 . The turbine of  claim 11 , wherein
 an adjustable valve is disposed inside the right flow passage in the vicinity of the volute gas inlet; and   the adjustable valve is connected to a control mechanism.