초록 ▼

A centrifugal pump (1, 110) includes an apparatus for the removal of particles, wherein the centrifugal pump includes an impeller (6, 106). A fluid (2, 102) can be conveyed by means of the impeller (6, 106) through a suction passage (5, 105) from a suction stub (3, 103) to a pressure stub (4, 104).

A centrifugal pump (1, 110) includes an apparatus for the removal of particles, wherein the centrifugal pump includes an impeller (6, 106). A fluid (2, 102) can be conveyed by means of the impeller (6, 106) through a suction passage (5, 105) from a suction stub (3, 103) to a pressure stub (4, 104). The impeller (6, 106) is rotatable in a stator (7, 107). A gap (9, 19, 109) is arranged between the stator (7, 107) and the impeller (6, 106), wherein the gap (9, 19, 109) opens into a storage space (11, 21, 111) for particles. The storage space (11, 21, 111) communicates with the suction passage (5, 105) via a return line (12, 112) running through the stator (7, 107).

대표청구항 ▼

1. A pump, comprising: a stator;a suction conduit comprising a suction stub and a pressure stub, wherein the pressure stub is disposed downstream of the suction stub along a flow direction of the suction conduit;an impeller, rotatably disposed within the stator, wherein the impeller is configured to

1. A pump, comprising: a stator;a suction conduit comprising a suction stub and a pressure stub, wherein the pressure stub is disposed downstream of the suction stub along a flow direction of the suction conduit;an impeller, rotatably disposed within the stator, wherein the impeller is configured to convey a fluid through the suction conduit from the suction stub to the pressure stub;a gap disposed between the stator and the impeller;a storage space for particles, disposed in the stator, wherein the storage space is in fluid communication with the gap; anda return line, disposed in the stator, providing fluid communication between the storage space and the suction conduit, wherein the suction conduit is downstream of the storage space along a flow direction of the return line such that, in use, the particles are conveyed from the storage space to the suction conduit through the return line. 2. The pump of claim 1, wherein the stator comprises a fluid collection element and a stator element, wherein the return line is disposed at least partly in the stator element. 3. The pump of claim 2, wherein the return line extends into the fluid collection element such that the return line is disposed both in the stator element and in the fluid collection element. 4. The pump of claim 3, wherein the storage space is disposed on a first side of the fluid collection element, the pump further comprising a second storage space on a second side of the fluid collection element, wherein the second storage space is in fluid communication with the gap, and wherein the return line provides fluid communication between the second storage space and the suction conduit, wherein the suction conduit is downstream of the second storage space along the flow direction of the return line. 5. The pump of claim 1, wherein the gap comprises an annular collection passage and the return line comprises a line section tangential to the collection passage. 6. The pump of claim 5, wherein the line section has an axis which spans a plane with a radial line, wherein the plane defines an angle to a radial plane, wherein the radial line, starting from the pump axis, passes through a point of intersection of the axis with a cross-sectional surface of the inlet opening, and wherein the radial plane is normal to a pump axis. 7. The pump of claim 5, wherein the line section comprises a coating. 8. The pump of claim 7, wherein the coating comprises a sleeve which contains a coating material, wherein the sleeve is disposed in the line section or in the return line. 9. The pump of claim 1, wherein the return line is disposed entirely within the stator and comprises an upstream end within the stator and disposed at the storage space, a downstream end within the stator and disposed at the suction conduit, and an extent between the upstream end and the downstream end disposed within the stator. 10. The pump of claim 5, wherein the line section tapers in the flow direction of the suction conduit or is a groove disposed in a ring element connected to the stator. 11. A pump, comprising: a first stage, comprising: a first stator;a first suction conduit comprising a suction stub and a first pressure stub, wherein the first pressure stub is disposed downstream of the suction stub along a flow direction of the first suction conduit;a first impeller, rotatably disposed within the first stator, wherein the first impeller is configured to convey a fluid through the first suction conduit from the suction stub to the first pressure stub;a first gap disposed between the first stator and the first impeller;a first storage space for particles, disposed in the first stator, wherein the first storage space is in fluid communication with the first gap; anda first return line, disposed in the first stator, providing fluid communication between the first storage space and the first suction conduit, wherein the first suction conduit is downstream of the first storage space along a flow direction of the first return line such that, in use, the particles are conveyed from the first storage space to the first suction conduit through the first return line; anda second stage, comprising: a second stator;a second suction conduit comprising a second pressure stub, wherein the second pressure stub is disposed downstream of the first stage along a flow direction of the second suction conduit;a second impeller rotatably disposed within the second stator, wherein the second impeller is configured to convey the fluid through the second suction conduit from the first stage to the second pressure stub;a second gap disposed between the second stator and the second impeller;a second storage space for the particles, disposed in the second stator, wherein the second storage space is in fluid communication with the second gap; anda second return line, disposed in the second stator, providing fluid communication between the second storage space and the second suction conduit, wherein the second suction conduit is downstream of the second storage space along a flow direction of the second return line such that, in use, the particles are conveyed from the second storage space to the second suction conduit through the second return line. 12. The pump of claim 11, further comprising at least one third stage, comprising: a third stator;a third suction conduit comprising a third pressure stub, wherein the third pressure stub is disposed downstream of the second stage along a flow direction of the third suction conduit;a third impeller rotatably disposed within the third stator, wherein the third impeller is configured to convey the fluid through the third suction conduit from the second stage to the third pressure stub;a third gap disposed between the third stator and the third impeller;a third storage space for the particles, disposed in the third stator, wherein the third storage space is in fluid communication with the third gap; and a third return line, disposed in the third stator, providing fluid communication between the third storage space and the third suction conduit, wherein the third suction conduit is downstream of the third storage space along a flow direction of the third return line such that, in use, the particles are conveyed from the third storage space to the third suction conduit through the third return line. 13. The pump of claim 11, wherein the second stator comprises a fluid collection element and a stator element. 14. The pump of claim 11, wherein the first impeller and the second impeller are substantially mirror-image symmetric, with a plane of symmetry of the first impeller and the second impeller aligned normal to an axis of the pump. 15. The pump of claim 14, further comprising: a passage piece which leads to an upstream side of the second impeller;a deflection element which is rotatable with a pump shaft; wherein the second suction passage comprises: an outer passage section disposed outside the second stator; anda communication passage, wherein the communication passage connects the outer passage section to the passage piece;a third gap is disposed between the second stator and the deflection element, wherein the third gap leads away from the communication passage;a third storage space, wherein the third gap opens into the third storage space; anda third return line, wherein the third return line branches from the third storage space and wherein the third return line opens into the communication passage. 16. The pump of claim 14, further comprising a third stage disposed between the first stage and the second stage. 17. A centrifugal pump, including an apparatus for the removal of particles, wherein the centrifugal pump includes an impeller, wherein a fluid can be conveyed by means of the impeller through a suction passage from a suction stub to a pressure stub, wherein the impeller is rotatable in a stator, wherein a gap is arranged between the stator and the impeller, wherein the gap opens into a storage space for particles, characterized in that the storage space is in communication with the suction passage via a return line running through the stator, wherein the gap includes a ring-shaped collection passage and the return line has a line section which is arranged tangentially to the ring-shaped collection passage, wherein the line section tapers, in particular tapers conically, in the flow direction of the fluid or is made as a groove which is arranged in a ring element which is connected to the stator.