Multistage compressed gas engine and motor vehicle

Abstract

Disclosed is a multistage compressed gas engine, comprising: impellers and at least one impeller chamber where the impeller is installed, the impellers including a first impeller and a second impeller; a plurality of working chambers being formed by the side plates on both sides between the teeth on the circumferential surface of the first and second impellers, and a plurality of gas chambers allowing relative sealing of injected gas being formed by inner surface of the impeller chamber where the impeller is installed and each of the working chambers; the impeller chamber where the first impeller is installed being provided correspondingly with a first-stage compressed gas injection hole and a first-stage compressed gas discharge hole, and the impeller chamber where the second impeller is installed being provided correspondingly with a second-stage compressed gas injection hole and a second-stage compressed gas discharge hole, the first-stage compressed gas discharge hole being connected at its output to the second-stage compressed gas injection hole. Also disclosed is a motor vehicle equipped with the above compressed gas engine.

1 . A multistage compressed gas engine, comprising impellers and at least one impeller chamber where the impellers are installed, wherein:
 the impellers comprises a first impeller and a second impeller, both of which are provided on their circumferential surface with a plurality of teeth and side plates on both sides of the teeth;   a plurality of working chambers are formed by the teeth on the circumferential surface of the impeller and the side plates on both sides between the teeth, and a plurality of gas chambers allowing relative sealing of injected gas are formed by the inner surface of the impeller chamber where the impeller is installed and each of the working chambers; and   the impeller chamber where the first impeller is installed is provided correspondingly with a first-stage compressed gas injection hole and a first-stage compressed gas discharge hole, and the impeller chamber where the second impeller is installed is provided correspondingly with a second-stage compressed gas injection hole and a second-stage compressed gas discharge hole, the first-stage compressed gas discharge hole being connected at its output to the second-stage compressed gas injection hole.   
     
     
         2 . The multistage compressed gas engine according to  claim 1 , wherein the at least one impeller chamber comprises independently a first and a second impeller chambers, the first impeller being installed correspondingly in the first impeller chamber, the second impeller being installed correspondingly in the second impeller chamber. 
     
     
         3 . The multistage compressed gas engine according to  claim 1 , wherein the multistate compressed gas engine comprises one impeller chamber; the first and second impellers are of an integral structure processed as a whole and are installed in the impeller chamber. 
     
     
         4 . The multistage compressed gas engine according to  claim 3 , wherein:
 the first impeller and the second impeller have different diameters; and   the impeller chamber has different inner diameter regions to match the first and second impellers installed therein, so as to enable the inner surface of the impeller chamber to relatively seal the compressed gas in the working chamber of the first impeller and the compressed gas in the working chamber of the second impeller.   
     
     
         5 . The multistage compressed gas engine according to  claim 1 , wherein the first impeller and the second impeller are installed coaxially on the same power output shaft. 
     
     
         6 . The multistage compressed gas engine according to  claim 1 , wherein the second impeller is greater in diameter than the first impeller. 
     
     
         7 . The multistage compressed gas engine according to  claim 1 , wherein the second impeller is greater in thickness than the first impeller. 
     
     
         8 . The multistage compressed gas engine according to  claim 1 , wherein the first-stage compressed gas discharge hole has a diameter 2-10 times as long as that of the first-stage compressed gas injection hole, and the second-stage compressed gas discharge hole has a diameter 2-10 times as long as that of the second-stage compressed gas injection hole, the diameter of the second-stage compressed gas injection hole being no smaller than that of the first-stage compressed gas discharge hole. 
     
     
         9 . The multistage compressed gas engine according to  claim 1 , wherein the impeller chamber corresponding to the first impeller is provided on its inner surface with an air-jet import slot arranged along the rotational circumferential surface and communicated with the first-stage compressed gas injection hole. 
     
     
         10 . The multistage compressed gas engine according to  claim 9 , the wherein a length of the air-jet import slot is greater than the distance between two adjacent teeth. 
     
     
         11 . The multistage compressed gas engine according to  claim 1 , wherein the impeller chamber is provided on its inner surface with an exhaust export slot in parallel with the axis of the shaft, the exhaust export slot being connected with the compressed gas discharge hole. 
     
     
         12 . The multistage compressed gas engine according to  claim 9 , wherein the impeller chamber is provided on its inner surface with an exhaust export slot in parallel with the axis of the shaft, the exhaust export slot being connected with the compressed gas discharge hole. 
     
     
         13 . The multistage compressed gas engine according to  claim 11 , the wherein a distance between an end of the air-jet import slot and the adjacent exhaust export slot is greater than a distance between two adjacent teeth. 
     
     
         14 . A compressed gas engine, comprising multistage compressed gas engines positioned symmetrically at left and right, which each have a structure as described by  claim 1  and are coaxially installed on the same power output shaft. 
     
     
         15 . A motor vehicle provided with the multistage compressed gas engine according to  claim 1 , wherein the power outputted by the multistage compressed gas engine drives the drive shaft of the motor vehicle. 
     
     
         16 - 20 . (canceled)