A wet-running centrifugal pump includes an electric motor (1) and a centrifugal pump (7) which is driven thereby. The electric motor (1) has a rotor (4) which is rotatably arranged within the stator (3). A canned pot (13), which carries a motor-side bearing for the rotor (4), is provided between the
A wet-running centrifugal pump includes an electric motor (1) and a centrifugal pump (7) which is driven thereby. The electric motor (1) has a rotor (4) which is rotatably arranged within the stator (3). A canned pot (13), which carries a motor-side bearing for the rotor (4), is provided between the rotor and the stator. Moreover, a bearing plate (19) is provided, which carries a pump-side bearing for the rotor (4), wherein the bearing plate (19) is fixed on the housing side, and in the region of the pump-side bearing immerses into the canned pot. A radial seal (20) is provided between the bearing plate (19) and the canned pot (13).
대표청구항▼
1. A wet-running centrifugal pump comprising: an electric motor comprising a rotor and a stator;a centrifugal pump driven by the electric motor, wherein the rotor is arranged within the stator;a canned pot, which carries a motor-side bearing for the rotor, provided between the rotor and the stator,
1. A wet-running centrifugal pump comprising: an electric motor comprising a rotor and a stator;a centrifugal pump driven by the electric motor, wherein the rotor is arranged within the stator;a canned pot, which carries a motor-side bearing for the rotor, provided between the rotor and the stator, the canned pot being arranged in an axially floating manner, the canned pot being formed of fiber-reinforced plastic, the canned pot having a constant cross section and a bearing seat arranged on an inner side of a bottom of the canned pot;a bearing plate, which carries a pump-side bearing, for the rotor, fixed on a housing side, wherein the bearing plate, in the region of the pump-side bearing, immerses into the canned pot, the bearing plate being formed of metallic material;a centering means on the housing side to guide the closed end of the canned pot, the centering means being arranged on an outer side of the bottom of the canned pot;at least one radial seal provided between the canned pot and the bearing plate; anda ring component provided on the bearing plate side and being arranged between a part of the bearing plate which receives the pump-side bearing, and the open end of the canned pot, said ring component securing the at least one radial seal with a positive fit in the axial direction, the canned pot, at or adjacent to the open end, comprising a peripheral collar, wherein a portion of the ring component extends outside of the peripheral collar. 2. A wet-running pump according to claim 1, wherein a housing comprises a motor housing and a pump housing, the bearing plate being integrated between the motor housing and the pump housing, wherein a portion of the canned pot extends beyond the bearing seat when the bearing seat is mounted to the centering means. 3. A wet-running pump according to claim 1, wherein the at least one radial seal is formed by a radial sealing ring comprising a holding section which is integrated with a positive fit in a corresponding holding recess of the ring component. 4. A wet-running pump according to claim 1, wherein the canned pot, at or adjacent to the open end, comprises the peripheral collar which extends outwards from a tubular body of the canned pot. 5. A wet-running pump according to claim 1, wherein: a housing comprises a motor housing and a pump housing; andthe pump operates with a horizontally arranged shaft and at least one opening for the discharge of fluid is provided in the motor housing. 6. A wet-running pump according to claim 5, wherein the at least one opening is arranged axially in the region, in which the peripheral collar of the can also lies. 7. A wet-running pump according to claim 1, wherein the electric motor is a permanent magnet motor controlled by a speed controller. 8. A wet-running pump according to claim 1, wherein the at least one radial seal comprises a sealing lip directed radially to a tubular part of the canned pot and comprises a radially inwardly directed, surfaced sealing seat on the bearing plate. 9. A wet-running pump according to claim 1, wherein a tubular part of the canned pot is extended beyond a canned pot base. 10. A wet-running pump according to claim 1, wherein the bearing plate has a hollow-cylindrical section which, on an inside accommodates the pump-side bearing and the radial seal engages an outer side of the hollow-cylindrical section. 11. A wet-running centrifugal pump comprising: a housing; an electric motor comprising a rotor and a stator, wherein the rotor is arranged within the stator; a centrifugal pump operatively connected to the electric motor; a canned pot comprising a constant cross section, a tubular portion and a portion defining a motor-side bearing for the rotor, the canned pot comprising a canned pot first end and a canned pot second end, said canned pot first end being located opposite said canned pot second end with respect to an axial direction of the canned pot, the canned pot not being fixedly restrained in the axial direction, wherein the canned pot is movable relative to the housing and the stator, the tubular portion comprising a bearing seat, the housing comprising a housing part, the housing part cooperating with the bearing seat to center the canned pot in the housing; a bearing plate with a portion defining a pump-side bearing for the rotor, the bearing plate being fixed to the housing, the bearing plate having a portion in a region of the pump-side bearing that extends into the canned pot, the canned pot second end being located at a spaced location from the bearing plate, wherein the canned pot first end is movable in the axial direction relative to the housing and the canned part second end is movable in the axial direction relative to the bearing plate, the housing comprising a motor housing and a pump housing, the bearing plate being fixed to the housing by integrating a portion of the bearing plate between the motor housing and the pump housing at an interface between the motor housing and the pump housing; at least one radial seal between the canned pot and the bearing plate; and a ring component arranged between a part of the bearing plate which receives the pump-side bearing, and an open end of the canned pot, said ring component securing the at least one radial seal with a positive fit in an axial direction, the canned pot, at or adjacent to the open end, comprising a peripheral collar, wherein a portion of the ring component extends outside of the peripheral collar. 12. A wet-running pump according to claim 11, wherein the canned pot comprises a fiber-reinforced plastic. 13. A wet-running pump according to claim 12, wherein the bearing plate comprises a metallic material. 14. A wet-running pump according to claim 13, wherein the housing part is located opposite said canned pot first end, the canned pot comprising a canned pot base portion, the canned pot base portion comprising the bearing seat, the tubular portion comprising a tubular end portion, said tubular end portion defining at least a portion of said canned pot first end, the tubular end portion extending to a position beyond a position of the canned pot base portion when the tubular end portion cooperates with the housing part to center the canned pot in the housing, the tubular end portion extending about a periphery of said housing part. 15. A wet-running centrifugal pump comprising: a housing comprising a housing part;an electric motor comprising a rotor and a stator, wherein the rotor is arranged within the stator;a centrifugal pump operatively connected to the electric motor;a canned pot comprising a tubular portion and a portion defining a motor-side bearing for the rotor, the tubular portion comprising a tubular first end portion and a tubular second end portion, the tubular first end portion being located opposite the housing part, the tubular first end portion being located opposite said tubular second end portion with respect to an axial direction of the canned pot;a bearing plate with a portion defining a pump-side bearing for the rotor, the tubular second end portion being movably connected to the pump-side bearing such that the tubular second end portion is movable in the axial direction relative to the bearing plate and the tubular first end portion is movable in the axial direction relative to the housing part, wherein the canned pot is movable relative to the stator and the housing, the bearing plate being fixed to the housing, the bearing plate having a portion in a region of the pump-side bearing that extends into the canned pot, the canned pot comprising a constant cross section and a canned pot bearing seat, the tubular first end portion extending to a position beyond a position of the canned pot bearing seat when the canned pot bearing seat is mounted to the housing part to center the canned pot in the housing, the canned pot comprising a fiber-reinforced plastic, the bearing plate comprising a metallic material;a radial seal between the canned pot and the bearing plate; anda ring component arranged between a portion of the bearing plate which receives the pump-side bearing, and an open end of the canned pot, the ring component securing the radial seal with a positive fit in the axial direction, the canned pot, at or adjacent to the open end, comprising a peripheral collar, wherein a portion of the ring component extends outside of the peripheral collar, wherein the tubular first end portion extends about a periphery of said housing part, the housing comprising a housing interior space, said tubular first end portion being located in said housing interior space.
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이 특허에 인용된 특허 (4)
Vik,Brian D.; Gregor,Brian L., Assembly including face seal sized to interference fit in housing.
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