US 11,852,146 B2
Pump housing device for a fluid pump, and a fluid pump
Rifet Mehmedovic, Tumba (SE); Pedram Azadrad, Tullinge (SE); Henrik Nedlich, Sundbyberg (SE); Poul Anton Daugaard, Kolding (DK); and Jesper Raabjerg Jensen, Middelfart (DK)
Assigned to Velcora Holding AB, Arsta (SE)
Appl. No. 17/046,377
Filed by Velcora Holding AB, Arsta (SE)
PCT Filed Apr. 9, 2019, PCT No. PCT/SE2019/050327
§ 371(c)(1), (2) Date Oct. 9, 2020,
PCT Pub. No. WO2019/199222, PCT Pub. Date Oct. 17, 2019.
Claims priority of application No. 1850406-8 (SE), filed on Apr. 11, 2018.
Prior Publication US 2021/0156395 A1, May 27, 2021
Int. Cl. F04D 29/42 (2006.01); F04D 29/12 (2006.01); F16J 15/34 (2006.01)
CPC F04D 29/426 (2013.01) [F04D 29/126 (2013.01); F16J 15/3404 (2013.01)] 14 Claims
OG exemplary drawing
 
1. A pump housing device for a fluid pump for transporting a fluid, comprising
a rear wall element comprising a rear surface configured to be turned towards an impeller of the fluid pump, wherein the rear wall element comprises an opening, which defines a cylindrical surface and extends along a longitudinal central axis and wherein the opening is configured to receive a drive shaft of the impeller to rotate around the longitudinal central axis, and
a static seal element having a plane seal surface configured to seal against a plane seal surface of a rotary seal element configured to be mounted to the drive shaft and to rotate with the drive shaft around the longitudinal central axis, wherein:
the plane seal surface of the static seal element is turned away from the rear surface, and
one or more grooves extend through the rear wall element and through the rear surface and the cylindrical surface, and
wherein each of said one or more grooves has a bottom line that extends from the rear surface to the cylindrical surface;
wherein the static seal element has an outer cylindrical surface being in direct contact engagement with the cylindrical surface of the opening.