Polyetherimide pump

Abstract

A rotor for a pump includes a body formed from a polymer material. A density of the body is in a range from more than 0 to 10 g/cm 3 and a glass transition temperature (Tg) of the body is greater than or equal to 150° C. The polymer material is configured to form the body such that the body has a yield strength retention greater than 90% after soaking in oil for at least 7 days at a temperature in a range of 130° C. to 200° C.

1 - 35 . (canceled) 
     
     
         36 . A rotor for a pump, the rotor comprising:
 a body,   wherein the body is formed from a polymer material,   wherein a density of the body is in a range from more than 0 to 10 g/cm 3 ,   wherein a glass transition temperature (Tg) of the body is greater than or equal to 150° C., and   wherein the polymer material is configured to form the body such that the body has a yield strength retention greater than 90% after soaking in oil for at least 7 days at a temperature in a range of 130° C. to 200° C.   
     
     
         37 . The rotor according to  claim 36 ,
 wherein the body includes a central axis and a circumferential surface, and   wherein the body defines at least one recess extending from the circumferential surface towards the central axis.   
     
     
         38 . The rotor according to  claim 37 , wherein the at least one recess is configured to receive one of a roller and a vane. 
     
     
         39 . The rotor according to  claim 37 ,
 wherein the at least one recess includes a plurality of recesses extending from the circumferential surface towards the central axis,   wherein the rotor is configured to displace fluid within a pump housing between a pump inlet and a pump outlet, and   wherein the rotor is one of the following:
 a gear, and 
 a trochoid. 
   
     
     
         40 . The rotor according to  claim 36 , wherein the polymer material includes one selected from the group consisting of a polyetherimide (PEI), a polyethersulfone (PES), a polyphenylsulfone (PPSU), a blend of polyphenylene ether and polystyrene (PPE/PS), and combinations thereof. 
     
     
         41 . The rotor according to  claim 40 ,
 wherein the polymer material includes the polyetherimide (PEI),   wherein the polyetherimide (PEI) includes a polyetherimide resin and a phosphorus-containing stabilizer, and   wherein an amount of the phosphorus-containing stabilizer is effective to increase a melt stability of the polyetherimide resin.   
     
     
         42 . The rotor according to  claim 40 ,
 wherein the polymer material includes the polyetherimide (PEI), and   wherein the polyetherimide includes one selected from the group consisting of a polyetherimide copolymer, a polyetherimide terpolymer, a polyetherimide sulfone, a filled polyetherimide, an unfilled polyetherimide, a polyetherimide blend, and combinations thereof.   
     
     
         43 . The rotor according to  claim 42 ,
 wherein the polyetherimide includes the filled polyetherimide, and   wherein the filled polyetherimide is filled with one selected from the group consisting of carbon particles, metal, ceramic, glass fiber, and combinations thereof.   
     
     
         44 . The rotor according to  claim 43 ,
 wherein the filled polyetherimide is filled with the glass fiber, and   wherein the body is filled with the glass fiber in a range of 0.5 to 45 wt. %.   
     
     
         45 . The rotor according to  claim 36 , wherein the body has an Izod unnotched (80*10*4 at +23° C. and −30° C.) impact strength of at least 40 KJ/m 2 , as measured according to ISO 180/1 U. 
     
     
         46 . The rotor according to  claim 36 , wherein the body has a Vicat softening temp, rate B/120 of 220° C., as measured according to ISO 306. 
     
     
         47 . The rotor according to  claim 36 , wherein the body has an HDT/Ae, 1.8 MPa Edgew 120*10*4 sp=100 mm of 210° C., as measured according to ISO 75/Ae. 
     
     
         48 . A method of making a pump rotor configured to be arranged in a pump housing between a pump inlet and a pump outlet, the method comprising:
 providing a polymer material having:
 a density in a range from more than 0 to 10 g/cm 3 , 
 a glass transition temperature (Tg) greater than or equal to 150° C., and 
 a yield strength retention greater than 90% after soaking in oil for at least 7 days at a temperature in a range of 130° C. to 200° C.; and 
   forming the material into a reference configuration defining a body of the pump rotor.   
     
     
         49 . The method of making the pump rotor according to  claim 48 ,
 wherein the forming includes one of:
 injection molding the body from the polymer material, and 
 machining the body from a solid block of the polymer material. 
   
     
     
         50 . The method of making the pump rotor according to  claim 48 ,
 wherein the providing the polymer material includes determining a first noise vibration harshness of a first pump including the pump rotor formed from a selected polymer material is less than a second noise vibration harshness associated with a second pump,   wherein the pump rotor is positioned relative to a first housing, a first inlet, and a first outlet of the pump, and   wherein the second pump includes a metal rotor having the reference configuration and positioned relative to a second housing, a second inlet, and a second outlet that are respectively identical to the first housing, the first inlet, and the first outlet.   
     
     
         51 . The method of making the pump rotor according to  claim 50 , wherein the providing the polymer material includes determining the first noise vibration harshness is in a range of 10% to 50% less than the second noise vibration harshness. 
     
     
         52 . A pump comprising:
 an inlet;   an outlet;   a housing; and   a rotor arranged in the housing between the inlet and the outlet,   wherein the rotor includes a body formed from a polymer material and having:
 a density in a range from more than 0 to 10 g/cm 3 , 
 a glass transition temperature (Tg) greater than or equal to 150° C., and 
 a yield strength retention greater than 90% after soaking in oil for at least 7 days at a temperature in a range of 130° C. to 200° C. 
   
     
     
         53 . The pump according to  claim 52 ,
 wherein the pump is a positive displacement pump,   wherein body includes a central axis and a circumferential surface, and   wherein the body defines at least one recess extending from the circumferential surface towards the central axis.   
     
     
         54 . The pump according to  claim 53 , further comprising:
 at least one displacement component operatively positioned relative to the at least one recess to displace fluid between the inlet and the outlet,   wherein at least one of the housing and the at least one displacement component is formed of the polymer material.   
     
     
         55 . The pump according to  claim 53 ,
 wherein the at least one recess operatively engages the housing and the body defines a displacement component configured to displace fluid between the inlet and the outlet, and   wherein the housing is formed of the polymer material.   
     
     
         56 . A pump comprising:
 a first group of components including a housing, an inlet, and an outlet arranged according to an arrangement of a second group of components of an operatively assembled comparative pump,   wherein each component of the first group is identical to a corresponding component of the second group except that at least one component of the first group corresponding to at least one metal component of the second group is composed from a polymer material having a glass transition temperature (Tg) greater than or equal to 150° C. such that the pump achieves a noise vibration harshness in a range of 10% to 50% less than a noise vibration harshness of the operatively assembled comparative pump.