Shaft sealing assembly

A shaft sealing assembly for sealing a shaft extension emerging from a housing which is at least partly cylindrical, the assembly comprising:

• at least first and second lip type sealing elements which are axially displaced and disposed on the shaft extension, at least one of said sealing elements being fastened to and supported by a mounting ring means, said mounting ring means being disposed substantially coaxially with the shaft and the cylindrical portion of said housing, said mounting ring in turn being nonrotatably supported within the cylindrical portion of said housing by a substantially annular shaped, resilient wall member, said wall member being chemically resistant to liquid lubricant, for lubricating at least said assembly, said wall member per se being fastened along its outer periphery to an inside surface of the cylindrical portion of the housing;
• an inner annular chamber for containing said liquid lubricant and being formed between the shaft surface and an inner periphery of the mounting ring;
• an outer annular chamber formed between an outer surface of the mounting ring and an inner surface of the housing;
• first and second conduits in the form of liquid passages through the mounting ring and establishing fluid connection between said inner chamber and said outer chamber;
• means responsive to the shaft rotation for causing a whirl of the liquid lubricant in said inner annular chamber to force the liquid lubricant through one of said conduits into said outer chamber for facilitating cooling of the liquid lubricant, the other of said conduits for returning the liquid lubricant to the inner chamber for recirculation, whereby, by the flexing action of the resilient wall member, the mounting ring in use is capable of radial displacements to accommodate any shaft-eccentricity and vibratory radial displacements of the shaft extension.

A shaft sealing assembly for rotating shafts comprising:

• (a) a rotatable shaft and a bush fastened to the shaft,
• (b) a non-rotating mounting ring surrounding the bush,
• (c) a housing in which the mounting ring is radially movably accommodated, said housing containing a liquid lubricant,
• (d) two sealing rings spaced apart axially from one another and sealing against the bush, one of said sealing rings being arranged in the mounting ring,
• (e) an inner annular chamber for containing said liquid lubricant, the inner annular chamber being defined at least partly by said sealing rings, the mounting ring and the bush,
• (f) an outer annular chamber for cooling said liquid lubricant which outer annular chamber is formed between the mounting ring and the housing,
• (g) channels in the form of conduits in the mounting ring for connecting the inner and outer annular chambers, and
• (h) means for circulating said liquid in and between both said annular chambers by rotation of the shaft, said circulating means comprising a stationary deflector element in the inner annular chamber and another stationary deflector element in the outer annular chamber, both the deflector elements narrowing the cross-section of said circular chambers and forcing a part of said liquid lubricant in one chamber to flow to the other chamber.