IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0765353
(2010-04-22)
|
등록번호 |
US-8613605
(2013-12-24)
|
우선권정보 |
CN-2009 1 0107131 (2009-04-24) |
발명자
/ 주소 |
- Hammar, John
- Cheng, Po Lun
- Li, Min
|
출원인 / 주소 |
|
대리인 / 주소 |
Muncy, Geissler, Olds & Lowe, PLLC
|
인용정보 |
피인용 횟수 :
2 인용 특허 :
23 |
초록
▼
A centrifugal pump includes a pump unit and a drive unit. The pump unit includes a volute and an impeller disposed in the volute. The drive unit includes a stator and a rotor having a shaft. The volute includes an inlet, an outlet and a chamber in communication with the inlet and outlet. The shaft o
A centrifugal pump includes a pump unit and a drive unit. The pump unit includes a volute and an impeller disposed in the volute. The drive unit includes a stator and a rotor having a shaft. The volute includes an inlet, an outlet and a chamber in communication with the inlet and outlet. The shaft of the rotor extends into the chamber of the volute and the impeller is attached to and driven by the shaft. The volute further includes a transition part connected between the outlet and the chamber and communicating the outlet with the chamber. The axis of the transition part is angled to the axis of the outlet. The transition part is configured to improve the effect of fluid turbulence to thereby reduce noise, especially in the air-water stage.
대표청구항
▼
1. A centrifugal pump comprising: a pump unit comprising a volute and an impeller disposed in a chamber of the volute; anda drive unit comprising a stator and a rotor including a shaft;wherein the volute comprises an inlet and an outlet in communication with the chamber;the shaft of the drive unit e
1. A centrifugal pump comprising: a pump unit comprising a volute and an impeller disposed in a chamber of the volute; anda drive unit comprising a stator and a rotor including a shaft;wherein the volute comprises an inlet and an outlet in communication with the chamber;the shaft of the drive unit extends into the chamber of the volute and the impeller is attached to and driven by the shaft; andthe volute further comprises a transition part communicating the outlet with the chamber, an axis of the transition part being angled to an axis of the outlet, the transition part being arranged between the outlet and an exit aperture of the chamber;wherein in use the pump is mounted such that the axis of wherein in use the pump is mounted such that the axis of the outlet is located below a center of the impeller for reducing noise caused by fluid contained in the outlet preventing air in the volute chamber from escaping via the outlet. 2. The centrifugal pump of claim 1, wherein the rotor comprises a permanent magnet attached to the shaft, and the stator comprises a mounting structure having a mounting plate attached to the volute and a hollow cylinder extending from one side of the mounting plate, the shaft and magnet being disposed in the cylinder. 3. The centrifugal pump of claim 2, wherein the drive unit is a synchronous motor and the stator comprises a stator core located outside of the cylinder with pole faces confronting the rotor, and at least one stator winding wound about the stator core. 4. A centrifugal pump comprising: a pump unit comprising a volute and an impeller disposed in a chamber of the volute; anda drive unit comprising a stator and a rotor including a shaft;wherein the volute comprises an inlet and an outlet in communication with the chamber;the shaft of the drive unit extends into the chamber of the volute and the impeller is attached to and driven by the shaft; andthe volute further comprises a transition part communicating the outlet with the chamber, an axis of the transition part being angled to an axis of the outlet, the transition part being arranged between the outlet and an exit aperture of the chamber;wherein an axis of the inlet is offset from an axis of the impeller in a radial direction of the impeller perpendicular to the axis of the outlet; wherein the distance between the axis of the inlet and the axis of the outlet is smaller than the distance between the axis of the impeller and the axis of the outlet. 5. The centrifugal pump of claim 4, wherein the impeller is located at the center of the chamber, and an inclined part is connected between the inlet and an entrance of the chamber, an axis of the inclined part being inclined relative to the axis of the inlet. 6. The centrifugal pump of claim 5, wherein the axis of the inlet is parallel to the axis of the impeller. 7. The centrifugal pump of claim 5, wherein a baffle is disposed in the inclined part, the baffle comprising a guiding surface configured to avoid a dead space formed in the inclined part, a passageway for the main flow of the fluid through the inclined part and a drain hole. 8. The centrifugal pump of claim 7, wherein the drain hole is located in the lower most portion of the baffle and communicates with a drain aperture in the volute. 9. The centrifugal pump of claim 8, wherein the baffle further comprises a bleed passage formed in an upper most portion of the baffle. 10. The centrifugal pump of claim 4, wherein the impeller is located at the center of the chamber, and the inlet is connected directly to the chamber. 11. A centrifugal pump comprising: a pump unit comprising a volute and an impeller disposed in a chamber of the volute; anda drive unit comprising a stator and a rotor including a shaft;wherein the volute comprises an inlet and an outlet in communication with the chamber;wherein the shaft of the drive unit extends into the chamber and the impeller is attached to and driven by the shaft;wherein the volute further comprises a transition part communicating the outlet with the chamber, an axis of the transition part being angled to an axis of the outlet;wherein an inclined part is connected between the inlet and the chamber, and a baffle is disposed in the inclined part, the baffle comprising a drain hole and a bleed passage; andwherein at least one of the drain hole and the bleed passage cooperates with a projection on the volute to locate the baffle within the inclined part; wherein in use the pump is mounted such that the axis of the outlet is located below a center of the impeller for reducing noise caused by fluid contained in the outlet preventing air in the volute chamber from escaping via the outlet. 12. A centrifugal pump, comprising: a volute having a chamber and an inlet in communication with a central portion of the chamber;a motor having a shaft extending into the chamber of said volute;an impeller disposed in the chamber of said volute and attached to the shaft of said motor;a transition part having a first end in communication with a circumferential portion of the chamber of said volute and a second end, wherein an axis thereof is substantially perpendicular to the shaft of said motor;an outlet attached to the second end of said transition part, wherein an axis of thereof is at an angle with respect the axis of said transition part and substantially perpendicular to the shaft of said motor; andan axis of the impeller is perpendicular to a plane defined by the axis of the outlet and the axis of the transition part; wherein in use the pump is mounted such that the axis of the outlet is located below a center of the impeller for reducing noise caused by fluid contained in the outlet preventing air in the volute chamber from escaping via the outlet. 13. The centrifugal pump of claim 12 wherein, when viewed from the inlet, the axis of the outlet is offset from a center of the impeller. 14. The centrifugal pump of claim 13, wherein an entire inner surface of the outlet is offset from the center of the impeller in a radial direction of the impeller perpendicular to the axis of the outlet. 15. The centrifugal pump of claim 12, wherein the impeller is connected to the shaft by a lost motion clutch. 16. The centrifugal pump of claim 12, wherein the axis of the outlet is perpendicular to an axis of the inlet. 17. The centrifugal pump of claim 12, wherein an axis of the impeller is located in a first horizontal plane and the axis of the outlet is located in a second horizontal plane vertically below the first horizontal plane. 18. The centrifugal pump of claim 12, wherein an extension of the axis of the transition part intersects an axis of the impeller. 19. The centrifugal pump of claim 12, wherein in use the pump is mounted such that the axis of the outlet is located below a center of the impeller. 20. The centrifugal pump of claim 19, wherein an upper inner surface of the outlet is disposed below the center of the impeller. 21. A centrifugal pump comprising: a volute having a chamber, an inlet and an outlet which are in communication with the chamber;a motor having a shaft extending into the chamber of said volute;an impeller disposed in the chamber of said volute and attached to the shaft of said motor; anda transition part between the chamber and the outlet, an axis of the transition part being at an angle with respect an axis of the outlet and intersecting the shaft; wherein in use the pump is mounted such that the axis of the outlet is located below a center of the impeller for reducing noise caused by fluid contained in the outlet preventing air in the volute chamber from escaping via the outlet. 22. The centrifugal pump of claim 21, wherein in use the pump is mounted such that the axis of the outlet is located below a center of the impeller. 23. The centrifugal pump of claim 21, wherein the axis of the impeller is perpendicular to a plane defined by the axis of the outlet and the axis of the transition part.
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