KR950011859A - Mainstream pump - Google Patents

Abstract

A full-circumferential flow pump includes a motor having a stator, a shaft rotatably disposed in the stator, and a rotor mounted on the shaft for rotation relative to the stator, an outer frame casing (25) disposed around the stator, an outer cylindrical pump casing (5) disposed around the outer frame casing with an annular space (40) defined therebetween, and a pump assembly mounted on an end of the shaft for pumping a fluid into the annular space (40). The outer cylindrical pump casing has a suction window (5a,5b) for introducing a fluid therethrough. A suction case (10) is mounted on the outer cylindrical pump casing (5) for introducing a fluid therethrough and through the suction window (5a,5b) into the pump assembly, the suction casing having a suction port defined therein. <IMAGE>

Description

Mainstream pump

Since this is an open matter, no full text was included.

1 is a longitudinal sectional view of a mainstream bump according to a first embodiment of the present invention;

2 is a cross-sectional view taken along the line II-II of FIG.

3 is a cross-sectional view illustrating a process of assembling the mainstream pump according to the first embodiment;

6 is a longitudinal sectional view of a mainstream pump according to a second embodiment of the present invention;

FIG. 7A is a schematic longitudinal sectional view of the external cylindrical pump of the mainstream pump according to the second embodiment, and FIG.

Claims (35)

A mainstream pump comprising: a motor having a stator, a rotor mounted to the shaft and disposed in the stator and rotating relative to the stator, and an outer frame casing surrounding the stator; An outer cylindrical pump casing forming an annular space between the casing arranged around the outer frame casing and having a suction window for introducing a fluid; A pump assembly mounted at one end of the shaft to pump fluid into the annular space, and mounted on an outer circumferential surface of the outer cylindrical pump casing, formed therein, to introduce a fluid and send the fluid into the pump assembly through the suction window A mainstream pump comprising a suction case having a suction port. [2] The method of claim 1, further comprising: partition walls disposed on the outer cylindrical pump casing to divide the inner space of the outer cylindrical pump casing into a suction pressure side communicating with the suction window and a discharge pressure side communicating with the annular space. Mainstream pump. The mainstream pump according to claim 2, further comprising an elastic seal member between an inner circumference of the outer cylindrical pump casing and an outer circumferential surface of the partition wall. The method of claim 3. And a stopper mounted on the outer circumferential surface of the partition wall to prevent the sealing member from being separated. The mainstream pump of claim 1, wherein the outer cylindrical pump casing has at least one bar extending axially above the suction window. The mainstream pump according to claim 1, wherein the outer cylindrical pump casing has an enlarged portion located on the suction pressure side. The mainstream pump according to claim 1, wherein the suction window has a circumferential width substantially equal to the width of the suction case such that air is not blocked by the suction case. The mainstream pump of claim 1, further comprising a cover detachably mounted at an axial end of the outer cylindrical pump casing. The mainstream pump according to claim 8, further comprising a plug that is removably mounted to and removed from the cover to confirm the possibility of manual rotation of the shaft. 9. The mainstream pump of claim 8, further comprising a frequency converter mounted on an outer surface of the cover. 2. The discharge nozzle according to claim 1, wherein the outer cylindrical pump casing is made of sheet metal, and the outer cylindrical pump casing has an outlet formed on its outer circumferential wall, and is welded to the outer cylindrical pump casing having the outlet. And a discharge flange welded to the discharge nozzle and a reinforcing member welded to the discharge flange and the outer circumferential wall of the outer cylindrical pump casing. The mainstream pump according to claim 1, wherein the outer circumferential wall of the outer cylindrical pump casing is surrounded by the reinforcing member and the suction case. A mainstream double suction pump comprising: a stator. A rotor mounted to the shaft and disposed on the stator and rotating relative to the stator. A motor having an outer frame casing surrounding the stator, and disposed around the outer frame casing to form an annular space therebetween, An external cylindrical pump casing having a pair of suction windows near each axial end and an outlet formed therein in communication with the annular space between the suction windows and mounted at each opposite end of the shaft to pump fluid into the annular space. And a suction case having a pair of pump assemblies and a suction port mounted on an outer circumferential surface of the outer cylindrical pump casing, introducing a fluid having an inlet formed therein and sending the fluid through the suction window into the pump assembly. Mainstream dual suction pump. 15. The method of claim 13, further comprising: a partition wall disposed on the outer cylindrical pump casing for dividing an inner space of the outer cylindrical pump casing into a suction pressure side communicating with the suction window and a discharge pressure side communicating with the annular space. Mainstream dual suction pump. 15. The mainstream double suction pump of claim 13, further comprising a pair of covers mounted at each opposite end of said outer cylindrical pimp casing and removable for assembling said pump assembly. The method of claim 13. The mainstream double suction pump, characterized in that it further comprises a leg mounted on the base mounted on the outer cylindrical pump casing. 15. The mainstream pump according to claim 13, wherein each suction window has a circumferential width substantially equal to the width of the suction case such that air is not blocked by the suction case. The motor of claim 13, wherein the motor comprises a canned motor including a bearing housing supported by the outer frame casing and a bearing supported by the bearing housing, wherein the shaft is rotatably supported by the bearing. Bearing housing is fixed to said outer frame casing by a socket-spigot joint and an elastic zero ring. 14. The mainstream dual suction pump of claim 13, wherein the motor is rotatable in a speed range of at least 4,000 r.p.m. 15. The mainstream double suction pump of claim 13, wherein each pump assembly includes at least one impeller having blades made of sheet metal. 14. The mainstream dual suction pump of claim 13, wherein the pump assemblies have the same shut-off head but different flow rates. 15. The mainstream dual pump of claim 13 wherein the pump assembly includes at least one impeller having a blade and a pump-out blade disposed thereon. The pump assembly of claim 13, wherein each of the pump assemblies includes a multi-stage impeller, a suction pressure side disposed in the outer cylindrical pump casing, and communicating with an intake pressure side communicating with the suction bath and an annular space. An inner casing disposed in the partition wall in such a manner as to cover the partition wall to be separated and the impeller of each pump assembly except for the final stage impeller, and the fluid installed in the inner casing to the next stage impeller from the impeller A mainstream dual inlet pump comprising a return return blade for guiding. In a double suction pump. Pump casing; And a shaft installed in the pump casing and opposed by the pump casing and supported by the shaft. A mainstream double suction pump comprising a double suction impeller comprising two impeller elements having different capacity-head (Q-H) characteristics. 25. The mainstream dual suction pump according to claim 24, wherein the two impeller elements have different outer diameters and different inlet diameters. 25. The mainstream dual suction pump according to claim 24, wherein the two impeller elements have the same outer diameter and different inlet diameters. 25. The mainstream double suction pump according to claim 24, wherein the two impeller elements have different spans of blades. 25. The mainstream dual suction pump of claim 24, wherein the two impeller elements have different exit angles of the blades. 25. The mainstream dual suction pump according to claim 24, wherein the two impeller elements have a plurality of blades, and the number of blades of the impeller elements is different. In a double suction pump, it is incorporated in the pump casing and the jump casing. A motor disposed on the stator and having a rotor mounted to the stator and the shaft to rotate relative to the stator; And a set of two impeller elements fixed at each end of the shaft and having different capacity-head (Q-H) characteristics. 31. The double suction pump of claim 30, wherein the two impeller elements have different outer diameters and different inlet diameters. 31. The double suction pump of claim 30, wherein the two impeller elements have the same outer diameter and different inlet diameters. 31. The double suction pump of claim 30 wherein the two impeller elements have different spans of blades. 31. The dual inlet pump according to claim 30, wherein the two impeller elements have different exit angles of the blades. 31. The double suction pump of claim 30, wherein the two impeller elements have a plurality of blades and the number of blades of the impeller elements is different from each other. ※ Note: The disclosure is based on the initial application.