Sealing device with centering ring for a water pump

A sealing device for a water pump, said water pump comprising a casing, a shaft extending through said casing, and a bearing having a bearing housing and rolling bodies received in said casing, wherein said shaft is rotatably supported by said bearing, said sealing device comprising:

• an outer ring bearing connected to said bearing housing;
• a slide ring sealing unit comprising a slide ring, a counterring, and at least one compression spring;
• said slide ring having a radially inner wall;
• a centering ring resting loosely at said bearing housing and comprising centering elements;
• said compression spring forcing said slide ring against said counterring and said counterring against said centering ring at said bearing housing so that said slide ring sealing unit is connected with said centering ring to said bearing housing and is centered at said bearing housing by said centering elements;
• said slide ring sealing unit further comprising a bellows-shaped secondary sealing member connected to said slide ring;
• said secondary sealing member comprising at least one dampening member supported on said shaft and on said radially inner wall of said slide ring by being elastically deformed;
• and
• said dampening member having a funnel-shaped end resting on said radially inner wall by being elastically deformed.

A sealing device for a water pump, said water pump comprising a casing, a shaft extending through said casing, and a bearing having a bearing housing and rolling elements received in said casing, wherein said shaft is rotatably supported by said bearing, said sealing device comprising:

• a slide ring sealing unit comprising a slide ring, a counterring, and at least one compression spring;
• said slide ring having a radially inner wall;
• a centering ring resting loosely at said bearing housing and comprising centering elements;
• said compression spring forcing said slide ring against said counterring and said counterring against said centering ring at said bearing housing so that said slide ring sealing unit is connected with said centering ring to said bearing housing and is centered at said bearing housing by said centering elements;
• said slide ring sealing unit further comprising a bellows-shaped secondary sealing member connected to said slide ring;
• said secondary sealing member comprising at least one dampening member supported on said shaft and on said radially inner wall of said slide ring by being elastically deformed;
• and
• wherein said centering elements are in the form of axially spaced ring members, wherein a first one of said ring members is inserted into said bearing housing and a second one of said ring members is inserted into said casing.