Fluid pumps

Abstract

In accordance with at least one aspect of this disclosure, embodiments of fluid pumps, pump cases, valve bodies, and volutes are disclosed herein. Embodiments of methods for manufacturing fluid pumps, pump cases, valve bodies, and volutes are also disclosed herein. Embodiments can include additive manufacturing, for example. Certain embodiments can include additively manufacturing a pump case in a tilted orientation, utilizing only coincidental support structure having a unique shape, and with teardrop shaped volute and/or valve body.

What is claimed is: 
     
         1 . An additively manufactured valve body, comprising:
 an interior surface;   a plurality of interior annular features integrally formed with and extending radially inwardly from the interior surface and positioned apart in an axial direction relative to each other; and   a support structure formed integrally with and connecting a lower-in-build annular feature to a higher-in-build annular feature.   
     
     
         2 . The valve body of  claim 1 , wherein the support structure includes a filled-in Y-shape. 
     
     
         3 . The valve body of  claim 2 , wherein the support structure includes a stem and a wide portion extending from the stem. 
     
     
         4 . The valve body of  claim 3 , wherein the stem of the support structure is integrally formed with and extends from a lower-in-build portion of the lower-in-build annular feature, wherein the wide portion extends from the stem and is integrally formed with and connected to a higher-in-build portion of the higher-in-build annular feature. 
     
     
         5 . The valve body of  claim 1 , further comprising a support structure for each annular feature. 
     
     
         6 . The valve body of  claim 5 , wherein each support structure extends between each successive pair of annular features. 
     
     
         7 . The valve body of  claim 6 , wherein the valve body is constructed at an angle between the axial direction and a build plate surface, wherein the angle is greater than about 45 degrees. 
     
     
         8 . An additively manufactured fluid pump case, comprising:
 a valve body, comprising:
 an interior surface; 
 a plurality of interior annular features integrally formed with and extending radially inwardly from the interior surface and positioned apart in an axial direction relative to each other; and 
 a support structure formed integrally with and connecting a lower-in-build annular feature to a higher-in-build annular feature. 
   
     
     
         9 . The fluid pump case of  claim 8 , wherein the support structure includes a filled-in Y-shape. 
     
     
         10 . The fluid pump case of  claim 9 , wherein the support structure includes a stem and a wide portion extending from the stem. 
     
     
         11 . The fluid pump case of  claim 10 , wherein the stem of the support structure is integrally formed with and extends from a lower-in-build portion of the lower-in-build annular feature, wherein the wide portion extends from the stem and is integrally formed with and connected to a higher-in-build portion of the higher-in-build annular feature. 
     
     
         12 . The fluid pump case of  claim 8 , further comprising a support structure for each annular feature. 
     
     
         13 . The fluid pump case of  claim 12 , wherein each support structure extends between each successive pair of annular features. 
     
     
         14 . The fluid pump case of  claim 13 , wherein the valve body is constructed at an angle between the axial direction and a build plate surface of greater than about 45 degrees. 
     
     
         15 . A method, comprising:
 additively manufacturing a valve body of fluid pump case as recited in  claim 1 ; and   milling away the support structure while finish-milling the valve body.   
     
     
         16 . The method of  claim 15 , wherein additively manufacturing includes laser power bed fusion. 
     
     
         17 . The method of  claim 16 , further comprising removing powder from within the valve body before milling through openings defined by the support structure. 
     
     
         18 . The method of  claim 15 , further comprising inserting a valve into the valve body.