Multi-stage centrifugal pump assembly (bearing carrier)
View Patent ↗A multi-stage centrifugal pump assembly which is manufactured in the same construction type with cast components on the one hand, and with a stainless steel lining formed of sheet metal on the other hand, includes a bearing carrier ( 13 ) which is designed and suitable for the connection of a cast housing component ( 12 ) as well as for receiving a sheet metal lining made of stainless steel.
1. A multi-stage centrifugal pump assembly comprising a motor housing ( 2 ), a pump housing connected thereto, and a bearing carrier ( 13 ) receiving a bearing ( 14 ) of a shaft ( 3 ), which on a motor side carries a rotor ( 4 ) and on a pump side carries impellers ( 7 ) arranged in pump chambers ( 8 ), wherein the bearing carrier ( 13 ) is designed for selectively receiving a cast housing part ( 12 ) comprising a pressure connection ( 11 ) of the pump or of a lining part ( 28 ) formed of sheet metal,
wherein the bearing carrier ( 13 ) on the pump side comprises a first support ring ( 19 ), which is designed and arranged corresponding to a support region to an outer diameter of the pump chambers ( 8 ),
wherein the bearing carrier ( 13 ) on the pump side comprises a second support ring ( 21 ) which lies within the first support ring ( 19 ) and which supports the lining part ( 28 ) on the inside, and
wherein the bearing carrier ( 13 ) on the pump side comprises a third support ring ( 23 ) arranged within the first and the second support rings ( 19 , 21 ) and which axially supports a stationary part ( 24 ) of an axial face seal ( 15 ).
2. The multi-stage centrifugal pump assembly according to claim 1 , wherein the first or the second support ring ( 19 , 21 ) is designed as a centering ring for the lining part ( 28 ) or the cast part ( 12 ).
3. A multi-stage centrifugal pump assembly comprising a motor housing ( 2 ), a pump housing connected thereto, and a bearing carrier ( 13 ) receiving a bearing ( 14 ) of a shaft ( 3 ), which on a motor side carries a rotor ( 4 ) and on a pump side carries impellers ( 7 ) arranged in pump chambers ( 8 ), wherein the bearing carrier ( 13 ) is designed for selectively receiving a cast housing part ( 12 ) comprising a pressure connection ( 11 ) of the pump or of a lining part ( 28 ) formed of sheet metal,
wherein the bearing carrier ( 13 ) on the pump side comprises a first support ring ( 19 ), which is designed and arranged corresponding to a support region to an outer diameter of the pump chambers ( 8 ), and
wherein a groove ( 26 ) open to the pump is provided in the bearing carrier ( 13 ), outside the first support ring ( 19 ), the groove serving for positive-fit receiving of centering means ( 27 ) integrally formed in the cast housing part ( 12 ) or of a seal ( 30 ) which seals the lining part ( 28 ) with respect to at least one housing casing ( 31 ), the centering means having ends thereof engaging into the groove ( 26 ).
4. The multi-stage centrifugal pump assembly according to claim 3 , wherein the lining part ( 28 ) at its radially outer end is formed to shape for forming a space receiving a part of the seal ( 30 ) for forming a groove ( 29 ).
5. The multi-stage centrifugal pump assembly according to claim 3 , wherein the housing casing ( 31 ) is closed at a side which is distant to the motor ( 1 ) by an end-side lining ( 32 ).
6. The multi-stage centrifugal pump assembly according to claim 5 , wherein the housing casing ( 31 ) and the end-side lining ( 32 ) are designed in a pot-like manner and as one piece as a deep-drawn sheet metal part.
7. The multi-stage centrifugal pump assembly according to claim 5 , wherein the end-side lining ( 32 ) is supported by an end-side support body ( 34 ).
8. The multi-stage centrifugal pump assembly according to claim 7 , wherein the end side lining ( 32 ) comprises a suction union ( 33 ) which is led through the support body ( 34 ).
9. The multi-stage centrifugal pump assembly according to claim 7 , wherein tension means are provided, which connect the end-side support body ( 34 ) to the bearing carrier ( 13 ) amid incorporation of the pump chambers ( 8 ) and the housing casing ( 31 ).
10. The multi-stage centrifugal pump assembly according to claim 7 , wherein the end-side support body ( 34 ) comprises an outer support ring ( 35 ), which is designed and arranged corresponding to a support region to the outer diameter of the pump chambers ( 8 ), as well as at least one inner support ring ( 36 ) and/or an inner support surface ( 37 ).
11. The multi-stage centrifugal pump assembly according to claim 7 , wherein the end-side support body ( 34 ) in a region aligned with the housing casing ( 31 ) is formed with free space ( 38 ) to the housing casing ( 31 ) or to the end-side lining ( 32 ).
12. The multi-stage centrifugal pump assembly according to claim 3 , wherein the housing casing ( 31 ) is arranged at a distance from the pump chambers ( 8 ) and comprises the pressure connection ( 11 ) of the pump.
13. A multi-stage centrifugal pump assembly comprising a motor housing ( 2 ), a pump housing connected thereto, and a bearing carrier ( 13 ) receiving a bearing ( 14 ) of a shaft ( 3 ), which on a motor side carries a rotor ( 4 ) and on a pump side carries impellers ( 7 ) arranged in pump chambers ( 8 ), wherein the bearing carrier ( 13 ) is designed for selectively receiving a cast housing part ( 12 ) comprising a pressure connection ( 11 ) of the pump or of a lining part ( 28 ) formed of sheet metal,
wherein the pump chambers ( 8 ) are clamped by tension means between an end-side cast part ( 10 ), which comprises a suction connection ( 9 ) of the pump, and the cast housing part ( 12 ), wherein the cast housing part ( 12 ) is fastened in the bearing carrier ( 13 ) by a screw.