Rotary blower with super-charged injection cooling

Abstract

This invention involves a rotary blower with super-charged injection cooling having multiple interconnected and synchronized parallel multi-lobe rotors with the same number of lobes for propelling flow from a suction port to a discharge port of an inner casing without using internal compression. The embodiments incorporate manifolds near the blower discharge port acting as super-charging inlet port injecting air at the elevated pressure over the blower discharge pressure to cool the impellers and internal casing. The cooling air supply could be piped from an external compressed air source or could be generated by one or more fans mounted on the rotors own shafts.

1 . A rotary blower with super-charged injection cooling apparatus, comprising:
 a. a housing structure having a flow suction port and a flow discharge port and internal flow passage there-between, and a manifold enclosing casing with injection ports towards rotor near discharge port;   b. two parallel multi-lobe rotors having the same number of lobes and rotatably mounted on two parallel rotor shafts respectively inside said inner casing and interconnected through a set of timing gears to rotate in synchronization for propelling flow from said suction port to said discharge port;   c. a super-charged apparatus comprising a cooling fan mounted on one of said rotor shaft and a flow passage for circulating cooling air through said apparatus to said manifold;   d. whereby said rotary blower is capable of achieving high vacuum while being kept light in mass and small in size, and at the same time enhancing the heat transfer from said blower outer surfaces, so that they could operate more quietly, reliably and be used for mobile applications.   
   
   
       2 . A rotary blower with super-charged injection cooling apparatus as claimed in  claim 1 , wherein said discharge port has induction channels between said injection ports and said outlet flange. 
   
   
       3 . A rotary blower with super-charged injection cooling apparatus, comprising:
 a. a housing structure having a flow suction port and a flow discharge port and internal flow passage there-between, and a manifold enclosing casing with injection ports towards rotor near discharge port;   b. two parallel multi-lobe rotors having the same number of lobes and rotatably mounted on two parallel rotor shafts respectively inside said inner casing and interconnected through a set of timing gears to rotate in synchronization for propelling flow from said suction port to said discharge port;   c. a super-charged apparatus comprising an inlet filter, a cooling fan mounted on one of said rotor shaft and a flow passage for circulating cooling air through said apparatus to said manifold;   d. whereby said rotary blower is capable of achieving high vacuum while being kept light in mass and small in size, and at the same time enhancing the heat transfer from said blower outer surfaces, so that they could operate more quietly, reliably and be used for mobile applications.   
   
   
       4 . A rotary blower with super-charged injection cooling apparatus as claimed in  claim 3 , wherein said discharge port has induction channels between said injection ports and said outlet flange. 
   
   
       5 . A rotary blower with super-charged injection cooling apparatus, comprising:
 a. a housing structure having a flow suction port and a flow discharge port and internal flow passage there-between, and a manifold enclosing casing with injection ports towards rotor near discharge port;   b. two parallel multi-lobe rotors having the same number of lobes and rotatably mounted on two parallel rotor shafts respectively inside said inner casing and interconnected through a set of timing gears to rotate in synchronization for propelling flow from said suction port to said discharge port;   c. a super-charged apparatus comprising said manifold, an external compressed air supply and flow passage connecting said compressed air supply and said injection manifold;   d. whereby said rotary blower is capable of achieving high vacuum while being kept light in mass and small in size, and at the same time enhancing the heat transfer from said blower outer surfaces, so that they could operate more quietly, reliably and be used for mobile applications.   
   
   
       6 . A rotary blower with super-charged injection cooling apparatus as claimed in  claim 5 , wherein said discharge port has induction channels between said injection ports and said outlet flange.