US 12,152,675 B2
Mechanical seal arrangement with improved cooling characteristics
Stefan Ledig, Pöcking (DE); and Martin Kuntz, Unterhaching (DE)
Assigned to EagleBurgmann Germany GmbH & Co. KG, Wolfratshausen (DE)
Appl. No. 18/031,265
Filed by EagleBurgmann Germany Gmbh & Co. KG, Wolfratshausen (DE)
PCT Filed Nov. 2, 2021, PCT No. PCT/EP2021/080329
§ 371(c)(1), (2) Date Apr. 12, 2023,
PCT Pub. No. WO2022/096430, PCT Pub. Date May 12, 2022.
Claims priority of application No. 10 2020 129 125.6 (DE), filed on Nov. 5, 2020.
Prior Publication US 2023/0375089 A1, Nov. 23, 2023
Int. Cl. F16J 15/34 (2006.01)
CPC F16J 15/3404 (2013.01) [F16J 15/3484 (2013.01)] 15 Claims
OG exemplary drawing
 
1. A mechanical seal arrangement comprising:
a first mechanical seal including a first rotating sliding ring and a first stationary sliding ring defining a first sealing gap therebetween,
a second mechanical seal having a second rotating sliding ring and a second stationary sliding ring defining a second seal gap therebetween,
a housing with an inlet and an outlet for a cooling liquid,
a rotating conveying sleeve which is joined to the first rotating sliding ring and the second rotating sliding ring,
said conveying sleeve having a plurality of conveying grooves on its outer circumference,
wherein the first stationary sliding ring is arranged radially outside the conveying sleeve and has an inner circumference which is eccentric to an outer circumference of the conveying sleeve so that a circumferential eccentric gap is formed between the outer circumference of the conveying sleeve and the inner circumference of the first stationary sliding ring, and
wherein the first stationary sliding ring, on a rear side facing away from the first sealing gap, has a first slot directed towards the outlet and a first widening recess on the inner circumference, which recess opens into the first slot.