摘要:
A blood pump (100) includes an impeller(114); a drive shaft (112) coupled to the impeller and configured to rotate with the impeller; a motor (102) configured to drive the impeller; and a bearing assembly (122) disposed adjacent the motor and configured to receive an end of the drive shaft. The bearing assembly includes a bearing, where the end of the drive shaft (112) is at least partially rounded, and the where the bearing includes a concave depression defined in a first side of the bearing, where the depression is configured to receive the end of the drive shaft. The bearing assembly may include a lubricant chamber configured to hold a lubricant.
摘要:
The invention relates to a small electric motor, comprising a shaft (1), to which a radial bearing (11) and an axial bearing are allocated. The axial bearing has a non-magnetic ball-bearing (3) which is located in a central recess (2), provided at one end of the shaft (1) and which is guided by the edge (6) of said recess (2). The side of the ball-bearing which faces away from the shaft (1) runs against the bearing surface (5) of a bushing (4).
摘要:
An apparatus comprises a magnetic head (11) for reading and/or writing information from/on an information carrier in the form of a magnetic tape (5). The head (11) is mounted on a rotatable drum (10) for moving the head (11) relative to the information carrier (5) which is wound around the drum (10). The rotatable drum (10) is supported in the radial direction by fluid bearings (25 and 26) and supported in the axial direction by a thrust bearing (23). The thrust bearing (23) comprises a bearing surface (21) of a thrust plate (20) and a convex end (22) of the shaft (14). The thrust plate (20) is made of cemented tungsten carbide and the shaft (14) is made of steel so that the thrust bearing (23) shows low friction and low wear. The steel shaft, the bearing (23) and a metal cap (13) carrying the thrust plate (20) form a ground system which limits static charging of the rotatable drum (10).
摘要:
A vertical support device with reduced energy dissipation for rotating shafts comprising a spherical end portion (2) having radius (r), adapted to be rigidly constrained to a rotating vertical shaft, coupled with a rotating and floating plate (3) bearing a hemispherical cap (4), which identifies a complementary concave seat having radius (r) for the spherical end portion (2), also comprising a bearing track (5) for bearing a load (K) that rests on the rotating and floating plate (3), wherein the rotating and floating plate (3), the hemispherical cap (4) and the bearing track (5) are arranged coaxial to a housing hollow body (9) and have an axial hole (33, 51) for the passage of pressurised feed oil for the hydrostatic bearing of the spherical end portion (2), an oil separating film being arranged between the conjugated tracks arranged between the rotating and floating plate (3) and the bearing track (5) as well as between the hemispherical cap (4) and the spherical end portion (2), wherein the rotating and floating plate (3) has maximum outer radius (de/2) greater than the radius of curvature (r) of the spherical end portion (2), the support device also comprising at least one cooling circuit for cooling the bearing track (5).