Fluid machine

Abstract

A fluid machine includes a motor and a motor housing. The motor housing defines a motor chamber for accommodating the motor. The motor chamber is filled with inert gas. A rotor rotates in accordance with rotation of the motor. A pump housing defines a pump chamber for accommodating the rotor. A dividing wall is located between the pump housing and the motor housing. The pump housing and the motor housing are attached to each other via the dividing wall. Therefore, water is prevented from being generated in the motor chamber even if fluid that contains hydrogen leaks from the pump chamber to the motor chamber.

1 . A fluid machine, comprising: 
 a motor;    a motor housing, which defines a motor chamber for accommodating the motor, the motor chamber being filled with inert gas;    a rotor, which rotates in accordance with rotation of the motor;    a pump housing, which defines a pump chamber for accommodating the rotor; and    a dividing wall located between the pump housing and the motor housing, the pump housing and the motor housing being attached to each other via the dividing wall.    
   
   
       2 . The fluid machine according to  claim 1 , wherein the inert gas is at least one of nitrogen, argon, helium, neon, xenon, and krypton.  
   
   
       3 . The fluid machine according to  claim 1 , further comprising: 
 a rotary shaft, which transmits rotation of the motor to the rotor, the dividing wall has a through hole through which the rotary shaft extends; and    a sealing material located between the inner surface of the through hole and the rotary shaft.    
   
   
       4 . The fluid machine according to  claim 1 , further comprising a sealing member located at a contact portion between the motor housing and the dividing wall.  
   
   
       5 . The fluid machine according to  claim 1 , wherein the dividing wall includes a plurality of dividing members, which are piled on each other, and 
 a sealing member is located at least one of a portion between the adjacent dividing members, a portion between the motor housing and the adjacent dividing member, and a portion between the pump housing and the adjacent dividing member.    
   
   
       6 . The fluid machine according to  claim 1 , wherein the motor housing is open toward the dividing wall and the pump housing is open toward the dividing wall, wherein the dividing wall closes the motor housing and the pump housing.  
   
   
       7 . The fluid machine according to  claim 1 , wherein the fluid machine is a fluid pump for fluid including hydrogen.  
   
   
       8 . The fluid machine according to  claim 1 , wherein the fluid machine is incorporated in a fuel cell system.  
   
   
       9 . A fluid machine, comprising: 
 a motor;    a motor housing, which defines a motor chamber for accommodating the motor, the motor chamber being filled with inert gas;    a rotor, which rotates in accordance with rotation of the motor;    a pump housing, which defines a pump chamber for accommodating the rotor;    a dividing wall located between the pump housing and the motor housing, the pump housing and the motor housing being attached to each other via the dividing wall, and the motor housing is open toward the dividing wall and the pump housing is open toward the dividing wall, wherein the dividing wall closes the motor housing and the pump housing;    a rotary shaft, which transmits rotation of the motor to the rotor, the dividing wall has a through hole through which the rotary shaft extends; and    a sealing material located between the inner surface of the through hole and the rotary shaft.