CN215805239U - Flow guide rotating shaft of series type canned motor pump - Google Patents
Flow guide rotating shaft of series type canned motor pump Download PDFInfo
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- CN215805239U CN215805239U CN202122072935.9U CN202122072935U CN215805239U CN 215805239 U CN215805239 U CN 215805239U CN 202122072935 U CN202122072935 U CN 202122072935U CN 215805239 U CN215805239 U CN 215805239U
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- rotating shaft
- bearing seat
- motor body
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- cavity
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Abstract
The utility model relates to a canned motor pump, in particular to a flow guide rotating shaft of a series canned motor pump. According to the utility model, the hollow rotating shaft is arranged, so that an external circulating pipeline is omitted, and the medium leakage risk is reduced. The utility model comprises a shielding motor body, wherein a rotating shaft penetrates through the shielding motor body; the front bearing seat is fixed at the front end of the shielding motor body and used for supporting the rotating shaft to rotate; the rear bearing seat is fixed at the rear end of the shielding motor body and used for supporting the rotating shaft to rotate; the front cavity is arranged between the shielding motor body and the front bearing seat; the rear cavity is arranged between the rear end of the shielding motor body and the rear bearing seat; the rotating shaft is internally provided with a central tube for communicating the front cavity with the rear cavity, the front bearing seat is provided with a front through hole for a liquid medium to pass through, one end of the front through hole is communicated with the front cavity, the rear bearing seat is provided with a rear through hole for the liquid medium to pass through, and one end of the rear through hole is communicated with the rear cavity.
Description
Technical Field
The utility model relates to a canned motor pump, in particular to a flow guide rotating shaft of a series canned motor pump.
Background
Among the prior art, the canned motor pump is in order to increase the flowing back pressure of medium and improve the lift, often places multistage impeller in motor one end and forms multistage canned motor pump, but because impeller progression increases, the cantilever of pump increases, leads to the pump vibration value to exceed standard, and the pump shaft has great fracture risk, seriously influences pump life.
In order to solve the above problems, some canned motor pumps are designed to distribute multistage impellers in series on two sides of a canned motor, but due to the limitation of the canned motor structure, the structure needs to be externally provided with a circulating pipe to guide a medium on one side to the other side, for example, patent application No. CN201420232380.7 proposes a high-flow high-lift multistage canned motor pump, which comprises a pump body, a motor part is arranged in the middle of the pump body, and two ends of a rotor in the motor part respectively drive a plurality of front impellers and rear impellers to rotate, and is characterized in that: the back side of the front impeller is provided with a front cavity, the suction side of the rear impeller is provided with a rear cavity, pipelines with flange structures are respectively communicated with the front cavity and the rear cavity, and the two pipelines are communicated through a drainage tube arranged outside the pump body.
In the actual use process, if the transported liquid medium is a dangerous medium, the external circulation pipeline is adopted, so that the leakage risk exists, and certain potential safety hazard exists.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem of providing a flow guide rotating shaft of a series-connection type shielding pump, and an external circulating pipeline is omitted by arranging a hollow rotating shaft, so that the medium leakage risk is reduced.
The utility model relates to a flow guide rotating shaft of a series connection type shield pump, which comprises a shield motor body, wherein a rotating shaft penetrates through the shield motor body; the front bearing seat is fixed at the front end of the shielding motor body and used for supporting the rotating shaft to rotate; the rear bearing seat is fixed at the rear end of the shielding motor body and used for supporting the rotating shaft to rotate; the front cavity is arranged between the shielding motor body and the front bearing seat; the rear cavity is arranged between the rear end of the shielding motor body and the rear bearing seat; the rotating shaft is internally provided with a central tube for communicating the front cavity with the rear cavity, the front bearing seat is provided with a front through hole for a liquid medium to pass through, one end of the front through hole is communicated with the front cavity, the rear bearing seat is provided with a rear through hole for the liquid medium to pass through, and one end of the rear through hole is communicated with the rear cavity.
After being pressurized by the impeller set at the front end of the shielding motor body, the liquid medium enters the front cavity through the front through hole, is temporarily stored in the front cavity, then enters the rear cavity through the central tube in the rotating shaft, then enters the impeller set at the rear end of the shielding motor body through the rear through hole, and is pressurized again.
Preferably, a plurality of connecting holes communicated with the central tube are formed in the two end parts of the central tube in a penetrating mode around the circumferential direction of the rotating shaft.
The liquid inlet quantity and the liquid discharge quantity of the central pipe can be increased by arranging the plurality of connecting holes.
Preferably, the front bearing seat and the rear bearing seat are both rotationally connected with the rotating shaft through sliding bearing assemblies.
The use of a plain bearing assembly allows part of the liquid medium to pass through, which lubricates the function of the bearing.
The utility model has the beneficial effects that: through the arrangement of the front cavity, the rear cavity and the rotating shaft, the liquid medium can be conveyed from the front-stage impeller set to the rear-stage impeller set in the pump body, the leakage risk is reduced, and meanwhile, the heat generated by most of shielding motors can be taken away due to the fact that the liquid medium flows in the rotating shaft.
Drawings
FIG. 1 is a schematic structural diagram of an embodiment;
in the figure: 1. a shielded motor body; 2. a rotating shaft; 3. a front bearing seat; 4. a rear bearing seat; 5. a front cavity; 6. a rear cavity; 7. a central tube; 8. a front through hole; 9. a rear through hole; 10. connecting holes; 11. and a movable bearing assembly.
Detailed Description
The utility model will be further explained with reference to the drawings.
As shown in fig. 1, the diversion rotating shaft of the series connection type canned motor pump of the present invention comprises a canned motor body 1, on which a rotating shaft 2 is arranged in a penetrating way; a front bearing seat 3 fixed at the front end of the shielding motor body 1 and used for supporting the rotation of the rotating shaft 2; a rear bearing block 4 fixed at the rear end of the shielding motor body 1 and used for supporting the rotation of the rotating shaft 2; a front cavity 5 arranged between the shielding motor body 1 and the front bearing seat 3; and a rear cavity 6 arranged between the rear end of the shielding motor body 1 and the rear bearing seat 3; the improved bearing is characterized in that a central tube 7 for communicating the front cavity 5 with the rear cavity 6 is arranged in the rotating shaft 2, a front through hole 8 for a liquid medium to pass through is formed in the front bearing seat 3, one end of the front through hole 8 is communicated with the front cavity 5, a rear through hole 9 for the liquid medium to pass through is formed in the rear bearing seat 4, and one end of the rear through hole 9 is communicated with the rear cavity 6.
After being pressurized by the impeller set at the front end of the shielding motor body 1, the liquid medium enters the front cavity 5 through the front through hole 8, is temporarily stored in the front cavity 5, then enters the rear cavity 6 through the central tube 7 in the rotating shaft 2, then enters the impeller set at the rear end of the shielding motor body through the rear through hole 9, and is pressurized again. The liquid medium flows in the rotating shaft to take away most of heat generated by the shielding motor, and the heat dissipation of the pump body is facilitated.
In order to adjust the liquid inlet amount and the liquid outlet amount of the central tube, a plurality of connecting holes 10 communicated with the central tube 7 are arranged at two ends of the central tube 7 in a penetrating mode around the circumferential direction of the rotating shaft 2.
For lubricating the bearing, the front bearing seat 3 and the rear bearing seat 4 are both rotatably connected with the rotating shaft 2 through a sliding bearing assembly 11.
Of course, the foregoing is only a preferred embodiment of the utility model and should not be taken as limiting the scope of the embodiments of the utility model. The present invention is not limited to the above examples, and equivalent changes and modifications made by those skilled in the art within the spirit and scope of the present invention should be construed as being included in the scope of the present invention.
Claims (3)
1. The utility model provides a tandem type canned motor pump water conservancy diversion pivot, includes canned motor body (1), runs through on it and is equipped with pivot (2), its characterized in that still includes:
a front bearing seat (3) fixed at the front end of the shielding motor body (1) and used for supporting the rotation of the rotating shaft (2);
a rear bearing seat (4) fixed at the rear end of the shielding motor body (1) and used for supporting the rotation of the rotating shaft (2);
a front cavity (5) arranged between the shielding motor body (1) and the front bearing seat (3);
and a rear cavity (6) arranged between the rear end of the shielding motor body (1) and the rear bearing seat (4);
be equipped with center tube (7) of intercommunication antetheca (5) and back chamber (6) in pivot (2), be equipped with preceding through hole (8) that supply liquid medium to pass through on front bearing seat (3), preceding through hole (8) one end and antetheca (5) intercommunication, be equipped with back through hole (9) that supply liquid medium to pass through on back bearing seat (4), back through hole (9) one end and back chamber (6) intercommunication.
2. The tandem-type canned motor pump guide shaft of claim 1, wherein: and a plurality of connecting holes (10) communicated with the central pipe (7) are formed in the two end parts of the central pipe (7) in a circumferential penetrating manner around the rotating shaft (2).
3. The tandem-type canned motor pump guide shaft of claim 1, wherein: the front bearing seat (3) and the rear bearing seat (4) are rotatably connected with the rotating shaft (2) through sliding bearing assemblies (11).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122072935.9U CN215805239U (en) | 2021-08-30 | 2021-08-30 | Flow guide rotating shaft of series type canned motor pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122072935.9U CN215805239U (en) | 2021-08-30 | 2021-08-30 | Flow guide rotating shaft of series type canned motor pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215805239U true CN215805239U (en) | 2022-02-11 |
Family
ID=80153587
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122072935.9U Active CN215805239U (en) | 2021-08-30 | 2021-08-30 | Flow guide rotating shaft of series type canned motor pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215805239U (en) |
-
2021
- 2021-08-30 CN CN202122072935.9U patent/CN215805239U/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP02 | Change in the address of a patent holder |
Address after: 255200 village, Baita Town, Boshan District, Shandong, Zibo Patentee after: ZIBO LUMING PUMP INDUSTRY Co.,Ltd. Address before: 255200 Wudi village, Baita Town, Zichuan District, Zibo City, Shandong Province Patentee before: ZIBO LUMING PUMP INDUSTRY Co.,Ltd. |
|
| CP02 | Change in the address of a patent holder |