Title:
Liquid-cooled pump
Kind Code:
A1


Abstract:
The invention relates to a liquid-cooled pump, including a top cover, a hub, a base, a driving element and a bottom cover. The base is divided into a top space and a bottom space therein by a partition seat. The hub is disposed in the top space and the driving element is disposed in the bottom space. The hub is centrally disposed a spindle therein and a permanent magnet on the inner wall thereof. A ferromagnetic material is disposed underneath the partition seat where corresponds to the ferromagnetic material. While the pressure difference is born on the hub upon rotating, an attraction force between the permanent magnet and the ferromagnetic material can limit the hub to float off so that the friction between the blades of the hub and the top cover is avoidable and the issue that the fastener rubs against bearing won't occur.



Inventors:
Hong, Alex (Kaohsiung City, TW)
Jen, Huang Chung (Kaohsiung City, TW)
Application Number:
11/222755
Publication Date:
05/11/2006
Filing Date:
09/12/2005
Assignee:
Sunonwealth Electric Machine Industry Co., Ltd. (Kaohsiung City, TW)
Primary Class:
Other Classes:
417/423.1
International Classes:
F04B39/06; F04B17/00
View Patent Images:
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Primary Examiner:
FREAY, CHARLES GRANT
Attorney, Agent or Firm:
BACON & THOMAS, PLLC (ALEXANDRIA, VA, US)
Claims:
What is claimed is:

1. A liquid-cooled pump, comprising: a base having a top space and a bottom space therein separated by a partition seat; a hub disposed in said top space; a driving element disposed in said bottom space; a top cover fixed on top of said base and having an inlet pipe and an outlet pipe therein; and a bottom cover fixed underneath said base; wherein said partition seat is disposed a bearing therein, a spindle is sleeved in said bearing which is centrally positioned in said base and is rotated therein, a permanent magnet is disposed on an inner wall of said hub, and a ferromagnetic material is disposed underneath said partition seat where corresponds to said permanent magnet.

2. The liquid-cooled pump of claim 1, wherein a downwardly-attracting magnet is disposed underneath said hub where is around said spindle and a ferromagnetic material is disposed underneath said partition seat of said base where corresponds to said downwardly-attracting magnet.

3. The liquid-cooled pump of claim 1, wherein said ferromagnetic material is a sheetmetal.

4. The liquid-cooled pump of claim 2, wherein said ferromagnetic material is a sheetmetal.

5. The liquid-cooled pump of claim 1, wherein a shaft guide is disposed in said partition seat, a groove is located on a bottom side of shaft guide, said bearing is sleeved in said shaft guide, and a friction plate is inserted in said groove.

6. The liquid-cooled pump of claim 5, wherein a plurality of axial ribs are on an inner wall of said shaft guide.

7. The liquid-cooled pump of claim 1, wherein both ends of said spindle are in spherical shape.

8. The liquid-cooled pump of claim 5, wherein a plurality of spiral blades protrude beyond a top surface of said hub.

9. The liquid-cooled pump of claim 1, wherein said driving element comprises a circuit board and a stator set.

10. The liquid-cooled pump of claim 1, wherein said inlet pipe and said outlet pipe are connected to a pipe loop to supply water or circulate cooling liquid.

11. A liquid-cooled pump, comprising: a base having a top space and a bottom space therein separated by a partition seat; a hub disposed in said top space; a driving element disposed in said bottom space; a top cover fixed on top of said base and having an inlet pipe and an outlet pipe therein; and a bottom cover fixed underneath said base; wherein said partition seat is disposed a bearing therein, a spindle is sleeved in said bearing which is centrally positioned in said base and is rotated therein, a downwardly-attracting magnet is disposed underneath said hub where is around said spindle, and a ferromagnetic material is disposed underneath said partition seat where corresponds to said downwardly-attracting magnet.

12. The liquid-cooled pump of claim 11, wherein a ferromagnetic material is disposed underneath said partition base of said base where corresponds to said permanent magnet.

13. The liquid-cooled pump of claim 11, wherein said ferromagnetic material is sheetmetal.

14. The liquid-cooled pump of claim 12, wherein said ferromagnetic material is sheetmetal.

15. The liquid-cooled pump of claim 11, wherein a shaft guide is disposed in said partition seat, a groove is located on a bottom side of shaft guide, said bearing is sleeved in said shaft guide, and a friction plate is inserted in said groove.

16. The liquid-cooled pump of claim 15, wherein a plurality of axial ribs are on an inner wall on said shaft guide.

17. The liquid-cooled pump of claim 11, wherein both ends of said spindle are in spherical shape.

18. The liquid-cooled pump of claim 11, wherein a plurality of spiral blades protrude beyond a top surface of said hub and a permanent is disposed on an inner wall thereof.

19. The liquid-cooled pump of claim 11, wherein said driving element comprises a circuit board and a stator set.

20. The liquid-cooled pump of claim 11, wherein said inlet pipe and outlet pipe are connected to a pipe loop to supply water or circulate cooling liquid.

Description:

FIELD OF THE INVENTION

The invention relates to a liquid-cooled pump, which is disposed in the circulation loop of the liquid-cooled cooling system, thereby driving liquid in the external pipe of pump to circulate for the purpose of heat dissipation.

BACKGROUND OF THE INVENTION

The conventional liquid-cooled pump is shown in FIG. 1 whose main body thereof is composed of a top cover 11, an partition 12 and a bottom cover so that an airtight top space 14 and an airtight bottom space 15 are formed therein, the blade 20 is disposed in the top airtight space 14, and the motor set 30 is disposed in the airtight bottom space 15;

The airtight top space 15 must be filled with liquid. In addition, an inlet pipe 16 and an outlet pipe 17 are also disposed in the top cover 11 to connect with the pipe loop for liquid circulation respectively. When the motor set 30 drives the blade to rotate, the liquid is inducted from the inlet pipe 16 and exhausted via the outlet pipe so as to achieve the cooling purpose by means of the constant circulation.

SUMMARY OF THE INVENTION

However, the blades of the foregoing conventional structure are consumed due to the friction between the blades 20 and the top cover 11, further resulting in the shortcoming in losing the original precision and the operational balance.

Most of the blade extensions 21 on top of the blades 20 primarily serve to circulate liquid. Hence, the liquid flow speed adjacent to the blade extension 21 is faster. In contrast, the liquid flow speed underneath the blade extension is slower. Such flow speed difference will cause the pressure difference, meaning that faster flow speed generates low pressure while slower flow speed generates high pressure. As such, the higher pressure below the blades 20 will generate a thrust force to push against the whole blades upwardly so that the blades 20 will lead to the following two results during operation:

Firstly, as shown in FIG. 2, as the blades 20 float off, the blades 21 will continuously rub against the top cover 11, causing the attrition between the top cover 11 and the blade extension 21.

Secondly, as shown in FIG. 3, if the bottom end of a spindle 22 of the blade 20 is fixed by a fastener 23, the bearing 24 would be worn out as a result of the high-speed friction between the fastener 23 and the bottom of the bearing 24 when the blade is floating off.

As a consequence, as far as the extension of the life cycle of the liquid-cooled pump and the sustenance of the operational balance and circulating efficiency are concerned, the complete solution for resolving the float-off issue of the blades shall be addressed.

In view of this, the present invention thus provides a liquid-cooled pump, which completely resolves the float-off issue of the blades 20 and includes a top cover, a hub, a base, a driving element and a bottom cover. The base is divided into a top space and a bottom space by a partition seat therein. The hub is housed in the top room, and the driving element is housed in the bottom element. Moreover, the top cover is fixed on top of the base and the bottom cover is fixed on the bottom side of the base. A spindle is disposed by penetrating through the center of the hub and a permanent magnet is disposed on the inner wall thereof. A ferromagnetic material corresponding to the permanent magnet is disposed on the bottom side of the partition seat of the base. The ferromagnetic material may be a sheetmetal or any material having ferromagnetic characteristics. In spite of the pressure difference applied on the hub upon rotating, the attraction force between the permanent magnet and the ferromagnetic material limits the hub to float off and to shift so that the friction between the hub and the blade is avoidable and the issue that the fastener rubs against the bearing won't occur, prolonging the life cycle of the liquid-cooled pump.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is the schematic view showing the cross section of the conventional structure;

FIG. 2 is the schematic view (I) showing the operation of the conventional structure;

FIG. 3 is the schematic view (II) showing the operation of the conventional structure;

FIG. 4 is the top view showing the first embodiment of the present invention;

FIG. 5 is the cross-sectional view of the first embodiment;

FIG. 6 is the cross-sectional view of the second embodiment; and

FIG. 7 is the cross-sectional view of the third embodiment.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

The liquid-cooled pump shown in FIG. 4 and FIG. 5 is the first preferred embodiment, which includes a first top cover 40, a hub 50, a base 60, a driving element 70 and a bottom cover 80.

The top cover 40 has an inner chamber 41 therein with a downward opening, the top portion thereof is disposed an inlet pipe 42 and an outlet pipe 43 both connected to the inner chamber 41, and the external portion thereof are connected with the pipe loop for supplying water supply and circulating cooling liquid.

The hub 50 whose cross section resembles a hollow disk in form of a custom character shape contains various blades 51 protruding beyond the top thereof, the permanent magnet 53 disposed on the inner wall and a spindle 52 penetrating through the center thereof in formation of a spherical shape on the bottom end of the spindle.

The base 60 has a partition seat 61 extended therein which divides the inner space of the base 60 into a top space 62 and a bottom space 63. The top space shall have the corresponding shape of the inner chamber 41 of the top cover. There is a shaft guide 64 penetrating through the center of the partition seat 61, plural axial ribs 65 rise from the inner wall of the shaft guide 64, and a groove 66 is positioned inside the bottom portion of the shaft guide 64. Besides, where the bottom of the partition seat 61 corresponds to the permanent magnet 53 is embedded with a ferromagnetic material 67, which could be a sheetmetal or any material having ferromagnetic characteristics.

The driving element 70 is composed of a circuit board and a stator set.

The bottom cover 80 shall correspond to the bottom space 63 of the base 60 in terms of shape.

Upon assembling, the driving element 70 is disposed in the bottom space 63 down the partition seat 61 of the base 60. The bottom cover 80 further encloses the bottom portion of the base 60. A friction plate 55 is inserted in the groove 66 of the base 60. A bearing 54 is sleeved in the shaft guide 64 so that the spindle 52 of the hub 50 goes through the bearing 54 and rotates therein. Meanwhile, the hub 50 is exactly located in the top space 62 of the base 60, and the permanent magnet 53 on the inner wall thereof separated by the partition seat 61, corresponds to the stator set of the driving element 70. The top cover 40 encloses the top side of the base 60 by sealing with O ring and the agglutination of binding agent.

The inner chamber 41 shall be filled with water or cooling liquid. The spindle 52 is supported by the bearing 54 and urged against the friction plate 55 by single-point contact. After the driving element 70 drives the hub to rotate, the blades 51 on top of the hub 50 is able to impel water or cooling liquid to move, allowing water or cooling liquid to be guided into the inlet pipe 42 and drained from the outlet pipe 43. In spite of the pressure difference applied on the hub, an attraction force between the permanent magnet 53 of the hub 50 and the ferromagnetic material 67 of the partition seat 61 limits the hub to float off and to shift so that the friction between the blades 51 of the hub 50 and the top cover 40 is avoidable and the issue that the fastener rubs against the bearing won't occur.

Further refer to FIG. 6, which is the liquid-cooled pump in the second preferred embodiment of the present invention, containing a top cover 40, a hub 5, a base 60, a driving element 70 and a bottom cover 80.

A downwardly-attracting magnet 56 is embedded in the bottom side of the hub 50 where is around the spindle 52. A ferromagnetic material 68 is embedded in the bottom side of the partition seat 61 of the base 60 where is around the shaft guide 64.

Moreover, the downwardly-attracting magnet 56 corresponds to the ferromagnetic material 68 of the partition seat 61. Therefore, despite the pressure difference born on the hub 50 upon rotating, the attraction force between the downwardly-attracting magnet 56 of the hub 50 and the ferromagnetic material 68 of the partition seat 61 limits the hub 50 to float off and to shift so that the friction between the blade 51 of the hub 50 and the top cover 40 is avoidable and the issue that the fastener rubs against the bearing won't occur.

FIG. 7 is the liquid-cooled pump showing the third preferred embodiment of the present invention. The downwardly-attracting magnet 56 is embedded in the bottom side of the hub 50 where is around the spindle 52. The ferromagnetic material 68 is embedded in the bottom side of the partition seat 61 of the base 60 where is around the shaft guide 64. Furthermore, the downwardly-attracting magnet 56 corresponds to the ferromagnetic material 68 of the partition seat 61, adding that the ferromagnetic material 67 is embedded in which the partition seat 61 of the base 60 corresponds to the permanent magnet 53 of the base 50, so as to double the downwardly attracting effect.

As a result, despite the pressure difference born on the hub 50 upon rotating, by doubling the downwardly attracting force, the float-off and displacement of the hub 50 is limited so that the friction between the blades 51 of the hub 50 and the top cover 40 is avoidable and the issue that the fastener rubs against the bearing 54 won't occur.

By means of the mentioned design, the invention not only makes the blades of the hub and the top cover free from friction, but generates no issue that the fastener rubs against the bearing. Besides, the life cycle is extended. In view of the originality standing out similar products and the compliance with the requirements for patent grant, the application in writing is thus submitted in accordance with the laws.

While the invention has been described in terms of what is presently considered to be the most practical and preferred embodiments, it is to be understood that the invention needs not be limited to the disclosed embodiments. On the contrary, it is intended to cover various modifications and similar arrangements included within the spirit and scope of the specification, appended claims or figures, which are to be accorded with the broadest interpretation so as to encompass all such modifications and similar structures.