| 主权项 |
1. A centrifugal pump having a shaft (42) with a first end (42′) and a second end (42″), a rotor (44) coupled to the first end (42′) of the shaft (42), an electric motor (46) for driving the shaft (42) arranged at the second end (42″) of the shaft (42), a bearing housing (48) supporting the shaft (48) by means of a first bearing assembly (52) and a second bearing assembly (52), the bearing assemblies (50, 52) carrying axial and radial loads subjected to the shaft (42), the first bearing assembly (50) being closer to the first end (42′) of the shaft (42) than the second bearing assembly (52), the centrifugal pump (40) being further provided with a sealing means (54) positioned around the shaft (42) and between the rotor (44) and the first bearing assembly (50), the first bearing assembly (50) being a thrust bearing carrying axial loads subjected to the shaft (42), wherein the thrust bearing (50) is a four-point contact ball bearing having a split inner ring (50i1, 50i2) in applications where high load-carrying capacity is required, and a single row contact ball bearing in applications where low load-carrying capacity is required, whereby in both load conditions;
OR wherein the same bearing housing (48) is used with the thrust bearing (50) being a four-point contact ball bearing having a split inner ring (50i1, 50i2) in applications where high load-carrying capacity is required, and with a single row contact ball bearing in applications where low load-carrying capacity is required; and OR wherein the thrust bearing (50) is a four-point contact ball bearing having a split inner ring (50i1, 50i2). |
