Gear pump

Abstract

A gear pump ( 1 ) that discharges a fluid by rotating while a pair of gears ( 11, 12 ) are intermeshed includes a body ( 2 ) into which the respective gears ( 11, 12 ) are incorporated, a housing ( 3, 4 ) that contacts the body ( 2 ), a number of particles ( 30 ) that are interposed between an end surface ( 25, 26 ) of the body ( 2 ) and an end surface ( 28, 29 ) of the housing ( 3, 4 ), which contact each other, to prevent positional deviation between the body ( 2 ) and the housing ( 3, 4 ), and a fastening member ( 17 to 20 ) that fastens the housing ( 3, 4 ) to the body ( 2 ).

1 . A gear pump that discharges a fluid by rotating while a pair of gears are intermeshed, comprising:
 a body into which the respective gears are incorporated;   a housing that contacts the body;   a number of particles that are interposed between an end surface of the body and an end surface of the housing, which contact each other, to prevent positional deviation between the body and the housing; and   a fastening member that fastens the housing to the body.   
     
     
         2 . The gear pump as defined in  claim 1 , wherein the particles are formed from a harder material than the body and the housing. 
     
     
         3 . The gear pump as defined in  claim 1 , further comprising processing teeth formed on at least one of the end surface of the body and the end surface of the housing to prevent positional deviation between the body and the housing via both the particles and the processing teeth. 
     
     
         4 . The gear pump as defined in  claim 1 , wherein the particles are intermixed with a coating agent, whereupon the particles are applied together with the coating agent to at least one of the end surface of the body and the end surface of the housing.