CN111828341B - Centrifugal pump with integrated impeller and motor inner rotor - Google Patents
Centrifugal pump with integrated impeller and motor inner rotor Download PDFInfo
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- CN111828341B CN111828341B CN202010731485.7A CN202010731485A CN111828341B CN 111828341 B CN111828341 B CN 111828341B CN 202010731485 A CN202010731485 A CN 202010731485A CN 111828341 B CN111828341 B CN 111828341B
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- impeller
- motor
- fluted disc
- cylindrical part
- rotor
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D13/00—Pumping installations or systems
- F04D13/02—Units comprising pumps and their driving means
- F04D13/06—Units comprising pumps and their driving means the pump being electrically driven
- F04D13/0606—Canned motor pumps
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D1/00—Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps
- F04D1/06—Multi-stage pumps
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/18—Rotors
- F04D29/185—Rotors consisting of a plurality of wheels
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/40—Casings; Connections of working fluid
- F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
- F04D29/426—Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for liquid pumps
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The invention discloses a double-path water inlet and single-path water outlet centrifugal pump with an impeller and a motor inner rotor integrated, which comprises a water pump shell, a first motor stator, a first motor rotor, a first impeller and a second impeller, the water pump housing comprises a cylindrical part and a volute part, the volute part is arranged in the middle of the cylindrical part, the first impeller, the second impeller, the first motor rotor and the first motor stator are arranged at the communication part of the volute part and the cylindrical part, the first motor stator is fixed on the volute part, the first motor rotor is rotationally connected with the position corresponding to the first motor stator in the cylindrical part, the two ends of the first motor rotor are respectively connected with the first impeller and the second impeller, the first motor rotor drives the first impeller and the second impeller to rotate, the two ends of the cylindrical part are liquid inlets, and the liquid outlet is arranged in the volute part. The centrifugal pump of the invention avoids leakage and greatly reduces vibration and noise of pump operation.
Description
Technical Field
The invention relates to the technical field of centrifugal pumps, in particular to a centrifugal pump with an impeller and an inner rotor of a motor integrated.
Background
The basic structure of the centrifugal pump comprises six parts, namely an impeller, a pump body, a pump shaft, a bearing, a sealing ring, a packing box and the like, wherein when the centrifugal pump is used, the pump shaft is connected with an output shaft of a motor through a motor coupling, and the impeller is driven to rotate by the rotation of the motor. Because the pump shaft which is in line with the impeller needs to penetrate out of the pump body, sealing is needed, leakage is easy to cause, and vibration and noise of pump operation are large.
Disclosure of Invention
In view of the prior art, the invention provides a centrifugal pump with an impeller and a motor inner rotor integrated, which avoids leakage and greatly reduces vibration and noise of pump operation.
The technical scheme of the invention is realized as follows:
the utility model provides an impeller and integrative centrifugal pump of motor inner rotor, includes water pump shell, first motor stator, first motor rotor, first impeller and second impeller, the water pump shell includes cylindricality portion and snail portion, snail portion locates two the centre of cylindricality portion, snail portion is equipped with the intercommunication department of cylindricality portion first impeller, second impeller, first motor rotor and first motor stator, first motor stator fixes snail portion, first motor rotor rotates to be connected the position that corresponds with first motor stator in the cylindricality portion, first motor rotor's both ends are connected respectively first impeller and second impeller, first motor rotor drives first impeller and second impeller rotate, the both ends of cylindricality portion are the inlet, and the liquid outlet of water pump shell is located snail portion.
Furthermore, a first water lubrication bearing is arranged at the joint of the first impeller and the cylindrical part, and a second water lubrication bearing is arranged at the joint of the second impeller and the cylindrical part.
Furthermore, a water inlet flange is arranged on the liquid inlet at the end part of the cylindrical part.
Furthermore, the two cylindrical parts are detachably connected with the volute part through bolts respectively.
Furthermore, a liquid outlet flange is arranged at a liquid outlet of the volute part.
Further, the first end internal diameter of cylindricality portion is greater than second end internal diameter, and the second end and the snail shape portion of cylindricality portion are connected, first end in the cylindricality portion is equipped with third impeller and first fluted disc, be equipped with fourth impeller and second fluted disc in the second end of cylindricality portion, first fluted disc and second fluted disc with cylindricality portion rotates the connection, the third impeller with first fluted disc fixed connection, the fourth impeller with second fluted disc fixed connection, be equipped with second motor inner rotor in the cylindricality portion, second motor inner rotor is hollow tubular structure, cylindricality portion be equipped with second motor inner rotor complex second motor stator, second motor inner rotor internal rotation is connected with bevel gear, bevel gear respectively with first fluted disc and second fluted disc meshing.
Furthermore, the third impeller and the fourth impeller are respectively installed in a rotating ring, the end face of the rotating ring is fixedly connected with the first gear disc or the second gear disc, a sliding rail is arranged on the outer side wall of the rotating ring, a sliding groove is formed in the inner side wall of the cylindrical portion, and the sliding rail rotates in the sliding groove.
The invention has the beneficial effects that: the water pump casing is hollow structure, and the water pump casing includes cylindricality portion and snail shape portion, and cylindricality portion and snail shape portion intercommunication, water flows in from the cylindricality portion at both ends during the water pump work, flows from snail shape portion. The first motor stator is fixed on the volute part, the first motor rotor is rotatably connected to a position, corresponding to the first motor stator, in the volute part, and the first motor stator generates a magnetic field after being electrified to drive the first motor rotor to rotate. The two ends of the first motor rotor are respectively connected with the first impeller and the second impeller, the first motor rotor drives the first impeller and the second impeller to rotate when rotating, the first impeller and the second impeller extrude water to the middle and throw the water into the volute part, and the water is thrown out from a liquid outlet of the volute part under the centrifugal action. Because the first motor rotor is completely wrapped in the volute and no rotating shaft is exposed, there is no structure such as a packing seal or a mechanical seal that may cause leakage. The two ends of the first motor rotor are provided with the first impeller and the second impeller to form an integrated structure, the first motor rotor is stressed in a balanced manner, and vibration and noise of operation of the pump are greatly reduced.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only preferred embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without inventive exercise.
FIG. 1 is a sectional view of a centrifugal pump in which an impeller and an inner rotor of a motor are integrated according to embodiment 1 of the present invention;
FIG. 2 is a sectional structure view of a centrifugal pump in which an impeller and an inner rotor of a motor are integrated according to embodiment 2 of the present invention;
FIG. 3 is an enlarged view of area A of FIG. 2;
in the figure, 1 a water pump shell, 2 a first motor stator, 3 a first motor rotor, 4 a first impeller, 5 a second impeller, 6 a column part, 7 a volute part, 8 a liquid inlet, 9 a first water lubricated bearing, 10 a second water lubricated bearing, 11 a water inlet flange, 12 bolts, 13 a water outlet flange, 14 a third impeller, 15 a first fluted disc, 16 a fourth impeller, 17 a second fluted disc, 18 a second motor rotor, 19 a second motor stator, 20 a bevel gear, 21 a rotating ring, 22 a sliding rail and 23 a sliding groove.
Detailed Description
In order to better understand the technical content of the invention, specific embodiments are provided below, and the invention is further described with reference to the accompanying drawings.
Example 1
Referring to fig. 1, a centrifugal pump with an integrated impeller and a motor inner rotor comprises a water pump housing 1, a first motor stator 2, a first motor rotor 3, a first impeller 4 and a second impeller 5, wherein the water pump housing 1 comprises a cylindrical part 6 and a volute part 7, the volute part 7 is arranged between the two cylindrical parts 6, the first impeller 4, the second impeller 5, the first motor rotor 3 and the first motor stator 2 are arranged at the communication position of the volute part 7 and the cylindrical part 6, the first motor stator 2 is fixed on the volute part 7, the first motor rotor 3 is rotatably connected to the position corresponding to the first motor stator 2 in the cylindrical part 6, two ends of the first motor rotor 3 are respectively connected with the first impeller 4 and the second impeller 5, the first motor rotor 3 drives the first impeller 4 and the second impeller 5 to rotate, two ends of the cylindrical part 6 are provided with liquid inlets 8, the liquid outlet of the water pump shell 1 is arranged on the volute part 7. The water pump shell 1 is of a hollow structure, the water pump shell 1 comprises a cylindrical part 6 and a volute part 7, the cylindrical part 6 is communicated with the volute part 7, and water flows in from two ends of the cylindrical part 6 and flows out from the volute part 7 when the water pump works. The first motor stator 2 is fixed on the volute part 7, the first motor rotor 3 is rotatably connected to the position, corresponding to the first motor stator 2, in the volute part 7, and after the first motor stator 2 is electrified, a magnetic field is generated to drive the first motor rotor 3 to rotate. The two ends of the first motor rotor 3 are respectively connected with the first impeller 4 and the second impeller 5, the first motor rotor 3 drives the first impeller 4 and the second impeller 5 to rotate when rotating, the first impeller 4 and the second impeller 5 extrude water to the middle and throw the water into the volute part 7, and the water is thrown out from the liquid outlet of the volute part 7 under the centrifugal action. Since the first motor rotor 3 is completely enclosed in the volute 7 and no rotating shaft is exposed, there is no structure such as a packing seal or a mechanical seal that may cause leakage. The two ends of the first motor rotor 3 are provided with a first impeller 4 and a second impeller 5 to form an integrated structure, the stress of the first motor rotor 3 is balanced, and the vibration and the noise of the operation of the pump are greatly reduced.
Specifically, a first water lubrication bearing 9 is arranged at the joint of the first impeller 4 and the cylindrical part 6, and a second water lubrication bearing 10 is arranged at the joint of the second impeller 5 and the cylindrical part 6. The friction of the first motor rotor 3 is reduced. The first impeller 4 and the second impeller 5 are positioned by a left water lubrication sliding bearing and a right water lubrication sliding bearing respectively and are driven by an inner rotor of the motor.
Specifically, a water inlet flange 11 is arranged on the liquid inlet 8 at the end of the cylindrical part 6. The water inlet flange 11 is connected with a water inlet pipe, so that the pipeline connection is facilitated.
Specifically, the two cylindrical portions 6 are detachably connected to the volute portion 7 through bolts 12. The cylindrical part 6 can be removed and the first motor rotor 3 and impeller can be mounted and the cylindrical part 6 can be mounted.
Specifically, a liquid outlet flange 13 is arranged at a liquid outlet of the volute part 7. The water outlet flange 13 is connected with the water outlet pipe, so that the pipeline connection is facilitated.
Example 2
Referring to fig. 2 to 3, the present embodiment is different from embodiment 1 in that an inner diameter of a first end of the cylindrical portion 6 is larger than an inner diameter of a second end, the second end of the cylindrical portion 6 is connected to the spiral portion 7, the first end of the cylindrical portion 6 is provided with a third impeller 14 and a first toothed disc 15, the second end of the cylindrical portion 6 is provided with a fourth impeller 16 and a second toothed disc 17, the first toothed disc 15 and the second toothed disc 17 are rotatably connected to the cylindrical portion 6, the third impeller 14 is fixedly connected to the first toothed disc 15, the fourth impeller 16 is fixedly connected to the second toothed disc 17, the cylindrical portion 6 is provided with a second motor inner rotor 18, the second motor inner rotor 18 is a hollow tubular structure, the cylindrical portion 6 is provided with a second motor stator 19 engaged with the second motor inner rotor 18, the second motor inner rotor 18 is rotatably connected to a bevel gear 20, the bevel gears 20 are respectively engaged with the first and second toothed discs 15, 17.
A second motor is arranged in the cylindrical part 6, the second motor comprises a second motor inner rotor 18 and a second motor stator 19, and the second motor inner rotor 18 rotates after the second motor is electrified. The inner rotor 18 of the second motor is a hollow tubular structure, water flow in the cylindrical part 6 can flow through the hollow tubular structure, a bevel gear 20 is arranged in the hollow tubular structure, the bevel gear 20 is respectively meshed with the first fluted disc 15 and the second fluted disc 17, the bevel gear 20 revolves under the driving of the inner rotor 18 of the second motor, and rotates when the stress of the first fluted disc 15 and the stress of the second fluted disc 17 are unbalanced, so that the fluted discs with small stress rotate in an accelerated manner until the stress of the two fluted discs is balanced. In the using process, because the first end diameter of the cylindrical part 6 is larger than the second end diameter, because the water flow rates of different parts are consistent, the water flow rate of the end with the small diameter is large, when the rotor 18 rotates in the second motor, the rotor revolves around the movable bevel gear 20, the first fluted disc 15 and the second fluted disc 17 are meshed with the same bevel gear 20, that is, two sides of the bevel gear 20 are respectively meshed with the first fluted disc 15 and the second fluted disc 17, when the stress on the first fluted disc 15 and the second fluted disc 17 is unbalanced, the bevel gear 20 rotates, and the rotating speed of the fluted discs with the small stress in the first fluted disc 15 and the second fluted disc 17 is increased until the stress on the first fluted disc and the second fluted disc 17 is balanced. After the balance is achieved, the third impeller 14 and the fourth impeller 16 are stressed in a balanced manner, the third impeller 14 is fixedly connected with the first fluted disc 15, the fourth impeller 16 is fixedly connected with the second fluted disc 17, the accelerating force of the water flow pushed by the two impellers is balanced, the water is pushed to flow at the third impeller 14 in an accelerated manner and then enters the fourth impeller 16, the diameter of the water is reduced, so that the flow speed is increased and simultaneously pushed by the fourth impeller 16, the water flow is pushed by the fourth impeller 16 to accelerate, the speed of the water flow is increased after the water flow is accelerated, and the water flow is increased and then flows into the volute casing, so that the water flow speed of the water pump is increased.
Optionally, the third impeller 14 and the fourth impeller 16 are respectively installed in a rotating ring 21, an end surface of the rotating ring 21 is fixedly connected to the first toothed disc 15 or the second toothed disc 17, a sliding rail 22 is disposed on an outer side wall of the rotating ring 21, a sliding groove 23 is disposed on an inner side wall of the cylindrical portion, and the sliding rail 22 rotates in the sliding groove 23. When the rotating ring 21 rotates, the third impeller 14 and the fourth impeller 16 are driven to rotate. The slide rail 22 rotates in the slide groove 23 to ensure smooth rotation.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (6)
1. A centrifugal pump with an impeller and a motor inner rotor integrated is characterized by comprising a water pump shell, a first motor stator, a first motor rotor, a first impeller and a second impeller, the water pump shell comprises a cylindrical part and a volute part, the volute part is arranged between the two cylindrical parts, the first impeller, the second impeller, the first motor rotor and the first motor stator are arranged at the communication part of the volute part and the cylindrical part, the first motor stator is fixed on the volute part, the first motor rotor is rotationally connected with the position corresponding to the first motor stator in the cylindrical part, the two ends of the first motor rotor are respectively connected with the first impeller and the second impeller, the first motor rotor drives the first impeller and the second impeller to rotate, the two ends of the cylindrical part are liquid inlets, and the liquid outlet of the water pump shell is arranged on the volute part; the inner diameter of a first end of the cylindrical part is larger than that of a second end of the cylindrical part, the second end of the cylindrical part is connected with the volute part, a third impeller and a first fluted disc are arranged at the first end of the cylindrical part, a fourth impeller and a second fluted disc are arranged in the second end of the cylindrical part, the first fluted disc and the second fluted disc are rotatably connected with the cylindrical part, the third impeller is fixedly connected with the first fluted disc, the fourth impeller is fixedly connected with the second fluted disc, a second motor inner rotor is arranged in the cylindrical part, the second motor inner rotor is of a hollow tubular structure, a second motor stator matched with the second motor inner rotor is arranged in the cylindrical part and rotates in the cylindrical part, a bevel gear is connected with the second motor inner rotor, and the bevel gear is respectively meshed with the first fluted disc and the second fluted disc; when the first fluted disc and the second fluted disc are stressed unevenly, the bevel gear rotates, the rotating speed of the fluted disc with small stress in the first fluted disc and the second fluted disc is increased until the first fluted disc and the second fluted disc are stressed evenly.
2. A centrifugal pump with an impeller integrated with an inner rotor of a motor in accordance with claim 1, wherein a first water lubricated bearing is provided at a junction of the first impeller and the cylindrical portion, and a second water lubricated bearing is provided at a junction of the second impeller and the cylindrical portion.
3. The centrifugal pump integrating the impeller and the inner rotor of the motor as claimed in claim 1, wherein a liquid inlet at the end of the cylindrical part is provided with a water inlet flange.
4. The centrifugal pump of claim 1, wherein the two cylindrical portions are detachably connected to the worm portion by bolts.
5. A centrifugal pump with an impeller integrated with a rotor in a motor in accordance with claim 1, wherein the liquid outlet of the volute is provided with a water outlet flange.
6. The centrifugal pump with the impeller and the inner rotor integrated with the motor as claimed in claim 1, wherein the third impeller and the fourth impeller are respectively installed in a rotating ring, the end surface of the rotating ring is fixedly connected with the first toothed disc or the second toothed disc, the outer side wall of the rotating ring is provided with a sliding rail, the inner side wall of the cylindrical portion is provided with a sliding groove, and the sliding rail rotates in the sliding groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010731485.7A CN111828341B (en) | 2020-07-27 | 2020-07-27 | Centrifugal pump with integrated impeller and motor inner rotor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010731485.7A CN111828341B (en) | 2020-07-27 | 2020-07-27 | Centrifugal pump with integrated impeller and motor inner rotor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111828341A CN111828341A (en) | 2020-10-27 |
| CN111828341B true CN111828341B (en) | 2022-07-19 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010731485.7A Active CN111828341B (en) | 2020-07-27 | 2020-07-27 | Centrifugal pump with integrated impeller and motor inner rotor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111828341B (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3485177A (en) * | 1968-04-30 | 1969-12-23 | Atomic Energy Commission | Centrifugal pump having a shaftless impeller |
| CN203201822U (en) * | 2013-04-03 | 2013-09-18 | 郑志强 | Submersible pump |
| CN204458404U (en) * | 2015-02-28 | 2015-07-08 | 广州迈光电子科技有限公司 | A kind of Novel submersible pump |
| CN205190254U (en) * | 2015-10-22 | 2016-04-27 | 杨更先 | Immersible pump unit |
| CN208474135U (en) * | 2018-06-05 | 2019-02-05 | 山东星波环保设备有限公司 | Impeller built-in bearing formula one high-speed permanent magnetic centrifugal pump |
| CN209654256U (en) * | 2018-12-29 | 2019-11-19 | 合肥工业大学 | A kind of draining pump with small hub than impeller |
-
2020
- 2020-07-27 CN CN202010731485.7A patent/CN111828341B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3485177A (en) * | 1968-04-30 | 1969-12-23 | Atomic Energy Commission | Centrifugal pump having a shaftless impeller |
| CN203201822U (en) * | 2013-04-03 | 2013-09-18 | 郑志强 | Submersible pump |
| CN204458404U (en) * | 2015-02-28 | 2015-07-08 | 广州迈光电子科技有限公司 | A kind of Novel submersible pump |
| CN205190254U (en) * | 2015-10-22 | 2016-04-27 | 杨更先 | Immersible pump unit |
| CN208474135U (en) * | 2018-06-05 | 2019-02-05 | 山东星波环保设备有限公司 | Impeller built-in bearing formula one high-speed permanent magnetic centrifugal pump |
| CN209654256U (en) * | 2018-12-29 | 2019-11-19 | 合肥工业大学 | A kind of draining pump with small hub than impeller |
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| Publication number | Publication date |
|---|---|
| CN111828341A (en) | 2020-10-27 |
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