CN216589155U - Permanent magnet bearing magnetic pump - Google Patents
Permanent magnet bearing magnetic pump Download PDFInfo
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- CN216589155U CN216589155U CN202122929995.8U CN202122929995U CN216589155U CN 216589155 U CN216589155 U CN 216589155U CN 202122929995 U CN202122929995 U CN 202122929995U CN 216589155 U CN216589155 U CN 216589155U
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Abstract
The utility model relates to a permanent magnet bearing magnetic pump which comprises a pump cavity mechanism, a permanent magnet transmission mechanism and a magnetic force driving mechanism, wherein the permanent magnet transmission mechanism comprises a pump shaft and a permanent magnet bearing assembly, one end of the pump shaft is in transmission connection with an impeller, the permanent magnet bearing assembly is sleeved on the pump shaft, the permanent magnet bearing assembly comprises a permanent magnet rotor and a permanent magnet stator, the permanent magnet rotor is fixedly sleeved on the pump shaft, the permanent magnet stator is sleeved outside the permanent magnet rotor and separated through magnetic repulsion, and the permanent magnet rotor and the permanent magnet stator both comprise a plurality of permanent magnet rings which are magnetized in the axial direction and have the same magnetic field. Compared with the prior art, the utility model utilizes the magnetic force action between the permanent magnet rotor and the permanent magnet stator sleeved outside the pump shaft to enable the pump shaft to be in a suspension state, realizes the operation without mechanical friction, and is beneficial to prolonging the service life of the bearing, reducing the friction loss and improving the pump efficiency.
Description
Technical Field
The utility model belongs to the technical field of magnetic pumps, and relates to a permanent magnet bearing magnetic pump.
Background
The magnetic pump is widely applied in the fields of petroleum, chemical industry, pharmacy and the like as a leakage-free and fully-sealed centrifugal pump. The magnetic pump is often designed only considering the balance of axial force, neglecting the existence of radial force, causing the inner surface of the sliding bearing of the magnetic pump to be worn out due to the radial force, thereby needing to replace the wearing parts such as the sliding bearing and the like regularly. Particularly, when the magnetic pump deviates from the rated working condition, the radial force is particularly obvious.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a permanent magnet bearing magnetic pump capable of balancing radial force.
The purpose of the utility model can be realized by the following technical scheme:
a permanent magnet bearing magnetic pump comprises
The pump cavity mechanism comprises a pump cavity and an impeller arranged in the pump cavity;
the permanent magnet transmission mechanism comprises a pump shaft and a permanent magnet bearing assembly, one end of the pump shaft is in transmission connection with the impeller, the permanent magnet bearing assembly is sleeved on the pump shaft and comprises a permanent magnet rotor fixedly sleeved on the pump shaft and a permanent magnet stator sleeved outside the permanent magnet rotor and separated by magnetic repulsion, and the permanent magnet rotor and the permanent magnet stator respectively comprise a plurality of permanent magnet rings which are magnetized in the axial direction and have the same magnetic field direction; and
and the magnetic driving mechanism is in transmission connection with the other end of the pump shaft.
Further, the gap between the permanent magnet rotor and the permanent magnet stator is 0.05-0.15 mm.
Furthermore, the permanent magnet transmission mechanism comprises a plurality of permanent magnet bearing assemblies which are sleeved on the pump shaft in parallel.
Further, the permanent magnet bearing assembly comprises 4-8 permanent magnet rings.
Further, the permanent magnet bearing assembly further comprises a stator seat for fixing the permanent magnet stator.
Further, the pump cavity mechanism comprises a pump body and a connector sleeved outside the pump shaft, the pump cavity is formed by mutually surrounding one side of the pump body and the connector, and the pump body is provided with a liquid inlet and a liquid outlet.
Furthermore, the magnetic driving mechanism comprises an inner rotor assembly sleeved at the end part of the pump shaft, a pump cover and an isolation sleeve which mutually surround to form an inner rotor cooling cavity, an outer rotor assembly arranged outside the isolation sleeve, and a driving motor in transmission connection with the outer rotor assembly.
Furthermore, two sides of the stator seat are respectively connected with the connecting body and the pump cover and are encircled to form a permanent magnet bearing cooling cavity, and the permanent magnet ring is arranged in the permanent magnet bearing cooling cavity;
a liquid outlet pipe is arranged on the liquid outlet, and a circulating pipe is arranged between the liquid outlet pipe and the isolating sleeve; one end of the inner rotor assembly is connected to the pump shaft, and a circulation pore passage for communicating the permanent magnet bearing cooling cavity with the inner rotor cooling cavity is formed in the pump shaft; a pump shaft gap is arranged between the connecting body and the pump shaft;
the pump cavity, the permanent magnet bearing cooling cavity and the inner rotor cooling cavity are communicated in a circulating mode through a circulating pipe, a circulating pore passage and a pump shaft gap.
Furthermore, a circulation groove is formed in the outer surface of the pump shaft in the axial direction and communicated with the circulation pore channel, and the inner surface of the permanent magnet rotor covers the circulation groove.
Furthermore, a protective bearing assembly is also arranged on the pump shaft, and the protective bearing assembly comprises a protective bearing which is respectively embedded on the connecting body and the pump cover, and a protective shaft sleeve which is sleeved on the pump shaft;
the clearance between the protection shaft sleeve and the protection bearing is smaller than the clearance between the permanent magnet rotor and the permanent magnet stator.
Compared with the prior art, the utility model has the following characteristics:
1) the pump shaft is in a suspension state by utilizing the magnetic force action between the permanent magnet rotor and the permanent magnet stator which are sleeved outside the pump shaft, so that the operation without mechanical friction is realized, the service life of a bearing is prolonged, the friction loss is reduced, and the pump efficiency is improved;
2) aiming at the characteristic that the pump shaft generates different radial forces and generates corresponding radial displacement, the permanent magnet rotor and the permanent magnet stator are arranged around the pump shaft to generate a uniform balanced magnetic field, and when the pump shaft deflects, a resultant magnetic force resisting the radial force is correspondingly generated to push the pump shaft to reset, so that the effect of automatically adjusting the radial force is achieved;
3) the permanent magnet bearing assembly adopting axial magnetizing arrangement has larger bearing capacity and higher efficiency compared with radial magnetizing magnetic steel;
4) the utility model circularly communicates the pump cavity provided with the impeller, the cooling cavity provided with the permanent magnet bearing and the cooling cavity of the inner rotor through the circulating pipe and the circulating pore passage arranged in the pump shaft, and utilizes the high pressure at the outlet of the pump and the low pressure at the back side of the impeller as circulating driving force to realize the cooling circulation inside and outside the pump, fully utilize the pump efficiency, realize the cooling and lubricating effects on the bearing, the inner rotor assembly and the isolation sleeve and ensure the long-time normal operation of the pump.
Drawings
Fig. 1 is a schematic structural view of a permanent magnet bearing magnetic pump according to an embodiment;
FIG. 2 is an enlarged view of a portion of FIG. 1 at A;
the notation in the figure is:
the pump comprises a pump body 1, a connecting body 2, an impeller 3, a pump shaft 4, a permanent magnet rotor 5, a permanent magnet stator 6, a stator seat 7, a pump cover 8, an isolation sleeve 9, an inner rotor assembly 10, an outer rotor assembly 11, a driving motor 12, a connecting frame 13, a protective bearing 14, a protective shaft sleeve 15, a thrust bearing 16, a liquid outlet pipe 17, a circulating pipe 18, a retaining sleeve 19, an impeller nut 20, an inner rotor nut 21, a circulating semi-through hole 22, a circulating hole 23 and a circulating groove 24.
Detailed Description
The utility model is described in detail below with reference to the figures and specific embodiments. The present embodiment is implemented on the premise of the technical solution of the present invention, and a detailed implementation manner and a specific operation process are given, but the scope of the present invention is not limited to the following embodiments.
Example (b):
fig. 1 shows a permanent magnet bearing magnetic pump, which includes a pump cavity mechanism, a permanent magnet transmission mechanism, and a magnetic driving mechanism. Wherein, pump chamber mechanism includes that pump body 1, one side encircle with pump body 1 and constitute connector 2 of pump chamber to and locate the impeller 3 in the pump chamber, be equipped with inlet and liquid outlet on the pump body 1.
The permanent magnet transmission mechanism comprises a pump shaft 4 and 2 permanent magnet bearing assemblies, wherein one end of the pump shaft 4 is in transmission connection with the impeller 3, and the permanent magnet bearing assemblies are sleeved on the pump shaft 4 in parallel. The permanent magnet bearing assembly comprises a permanent magnet rotor 5 fixedly sleeved on a pump shaft 4, a permanent magnet stator 6 sleeved outside the permanent magnet rotor 5 and separated by magnetic repulsion, and a stator seat 7 fixedly connected with one side of a connecting body 2 and used for fixing the permanent magnet stator 6. The permanent magnet rotor 5 and the permanent magnet stator 6 respectively comprise 8 permanent magnet rings which are axially magnetized and have the same magnetic field direction. Wherein the gap between the permanent magnet rotor 5 and the permanent magnet stator 6 is 0.1 mm.
The magnetic driving mechanism comprises a pump cover 8, one side of which is fixedly connected with the stator seat 7, an isolation sleeve 9, an inner rotor assembly 10, an outer rotor assembly 11, a driving motor 12 and a connecting frame 13, wherein the isolation sleeve 9 is arranged on the other side of the pump cover 8 and mutually surrounds the pump cover to form an inner rotor cooling cavity, the inner rotor assembly 10 is positioned in the inner rotor cooling cavity and arranged at the end part of the pump shaft 4, the outer rotor assembly 11 is arranged outside the isolation sleeve 9 and corresponds to the inner rotor assembly 10, the driving motor 12 is in transmission connection with the outer rotor assembly 11, and the connecting frame 13 is arranged between the driving motor 12 and the pump cover 8.
When the impeller works, the driving motor 12 provides a rotary driving force, and the impeller 3 is driven to rotate at a high speed through the inner rotor assembly, the outer rotor assembly and the pump shaft 4, so that fluid conveying is realized. The pump shaft 4 is in a suspension state by utilizing the magnetic force action between the permanent magnet rotor 5 and the permanent magnet stator 6, so that the operation without mechanical friction is realized, the service life of a bearing is prolonged, and the pump efficiency is improved.
When the magnetic pump operates under different working conditions, different radial forces are generated, the pump shaft 4 generates radial displacement, the gap between the permanent magnet rotor 5 and the permanent magnet stator 6 is changed, the magnetic force action around the pump shaft 4 is unbalanced, a resultant magnetic force resisting the radial forces is generated, the pump shaft 4 is pushed to reset, and the effect of automatically adjusting the radial forces is achieved.
To avoid the difficulty of providing sufficient bearing capacity for the permanent magnet bearing assembly when the magnetic pump is started or stopped, the present embodiment also provides a protective bearing assembly on the pump shaft 4. The protective bearing assembly comprises a protective bearing 14 respectively embedded on the connecting body 2 and the pump cover 8, and a protective shaft sleeve 15 and a thrust bearing 16 sleeved on the pump shaft 4; and the clearance between the protective shaft sleeve 15 and the protective bearing 14 is smaller than the clearance between the permanent magnet rotor 5 and the permanent magnet stator 6, so that the pump shaft 4 can be supported, and the friction between the pump shaft 4 and the permanent magnet bearing assembly is prevented.
In order to achieve a good cooling and lubricating effect, a circulating cooling structure is further provided in the embodiment. Specifically, two sides of the stator seat 7 are respectively connected with the connecting body 2 and the pump cover 8 and form a permanent magnet bearing cooling cavity in an enclosing manner. A liquid outlet pipe 17 is arranged at the upper liquid outlet of the pump body 1, and a circulating pipe 18 is arranged between the liquid outlet pipe 17 and the isolation sleeve 9. The pump shaft 4 is also provided with a circulation pore canal communicating the permanent magnet bearing cooling cavity and the inner rotor cooling cavity, and the circulation pore canal comprises a circulation half through hole 22 which is arranged on the pump shaft 4 and connected with one end of the inner rotor assembly 10 and extends to the permanent magnet bearing cooling cavity along the axial direction, and a circulation hole 23 which is arranged on the pump shaft 4 along the radial direction and is communicated with the circulation half through hole 22 and the permanent magnet bearing cooling cavity. The surface of the pump shaft 4 is also provided with a circulation groove 24 communicated with the circulation hole 23 along the axial direction, and the inner surface of the permanent magnet rotor 5 covers the circulation groove 24. In addition, a pump shaft gap is arranged between the connecting body 2 and the pump shaft 4.
When the magnetic pump works, high-pressure fluid is generated at the liquid outlet pipe 17 and enters the inner rotor cooling cavity through the circulating pipe 18, so that eddy heat generated by the isolation sleeve 9 is taken away and the inner rotor assembly 10 is cooled; then the fluid passes through a protective bearing assembly on the pump cover 8 or enters a permanent magnet bearing cooling cavity through a circulation duct, and after passing through a gap between the permanent magnet rotor 5 and the permanent magnet stator 6 or a circulation groove 24, the permanent magnet rotor 5, the permanent magnet stator 6 and the pump shaft 4 are cooled and lubricated; and then returns to the low pressure area at the back side of the impeller 3 in the pump chamber through a protective bearing assembly arranged on the connecting body 2, and completes the cooling and lubricating circulation.
In order to avoid corrosion of the permanent magnet rotor 5 and the permanent magnet stator 6 caused by the conveying medium, stainless steel and Teflon protective layers are sequentially coated outside.
In order to ensure the installation and connection stability of all parts on the pump shaft 4, retaining sleeves 19 are respectively arranged between the inner rotor assembly 10 and the protective bearing assembly on the pump cover 8 and between the impeller 3 and the protective bearing assembly on the connecting body 2, one end of the pump shaft 4 is connected with the impeller 3 through an impeller nut 20, and the other end of the pump shaft is connected with the inner rotor assembly 10 through an inner rotor nut 21.
The embodiments described above are intended to facilitate the understanding and use of the utility model by those skilled in the art. It will be readily apparent to those skilled in the art that various modifications to these embodiments may be made, and the generic principles described herein may be applied to other embodiments without the use of the inventive faculty. Therefore, the present invention is not limited to the above embodiments, and those skilled in the art should make improvements and modifications within the scope of the present invention based on the disclosure of the present invention.
Claims (10)
1. A permanent magnet bearing magnetic drive pump is characterized in that the magnetic drive pump comprises
The pump cavity mechanism comprises a pump cavity and an impeller (3) arranged in the pump cavity;
the permanent magnet transmission mechanism comprises a pump shaft (4) and a permanent magnet bearing assembly, wherein one end of the pump shaft (4) is in transmission connection with the impeller (3), the permanent magnet bearing assembly is sleeved on the pump shaft (4), the permanent magnet bearing assembly comprises a permanent magnet rotor (5) and a permanent magnet stator (6), the permanent magnet rotor (5) is fixedly sleeved on the pump shaft (4), the permanent magnet stator (6) is sleeved outside the permanent magnet rotor (5) and is separated through magnetic repulsion, and the permanent magnet rotor (5) and the permanent magnet stator (6) respectively comprise a plurality of permanent magnet rings which are magnetized in the axial direction and have the same magnetic field direction; and
and the magnetic driving mechanism is in transmission connection with the other end of the pump shaft (4).
2. A permanent magnet bearing magnetic pump according to claim 1, characterized in that the gap between the permanent magnet rotor (5) and the permanent magnet stator (6) is 0.05-0.15 mm.
3. The permanent magnet bearing magnetic pump according to claim 1, wherein the permanent magnet transmission mechanism comprises a plurality of permanent magnet bearing assemblies sleeved on the pump shaft (4) in parallel.
4. A permanent magnet bearing magnetic pump according to claim 1 or 3, wherein the permanent magnet bearing assembly comprises 4-8 permanent magnet rings therein.
5. A permanent magnet bearing magnetic pump according to claim 1, characterized in that the permanent magnet bearing assembly further comprises a stator seat (7) for fixing the permanent magnet stator (6).
6. The permanent magnet bearing magnetic pump according to claim 5, wherein the pump cavity mechanism comprises a pump body (1) and a connector (2) sleeved outside the pump shaft (4), the pump cavity is formed by mutually surrounding one side of the pump body (1) and one side of the connector (2), and the pump body (1) is provided with a liquid inlet and a liquid outlet.
7. The permanent magnet bearing magnetic pump according to claim 6, wherein the magnetic driving mechanism comprises an inner rotor assembly (10) sleeved at the end of the pump shaft (4), a pump cover (8) and an isolation sleeve (9) which mutually surround to form an inner rotor cooling cavity, an outer rotor assembly (11) arranged outside the isolation sleeve (9), and a driving motor (12) in transmission connection with the outer rotor assembly (11).
8. The permanent magnet bearing magnetic pump according to claim 7, wherein both sides of the stator base (7) are respectively connected with the connecting body (2) and the pump cover (8) and enclose to form a permanent magnet bearing cooling cavity, and the permanent magnet ring is arranged in the permanent magnet bearing cooling cavity;
a liquid outlet pipe (17) is arranged on the liquid outlet, and a circulating pipe (18) is arranged between the liquid outlet pipe (17) and the isolating sleeve (9); one end of the inner rotor assembly (10) is connected to the pump shaft (4), and a circulation duct for communicating the permanent magnet bearing cooling cavity with the inner rotor cooling cavity is formed in the pump shaft; a pump shaft gap is arranged between the connecting body (2) and the pump shaft (4);
the pump cavity, the permanent magnet bearing cooling cavity and the inner rotor cooling cavity are communicated in a clearance circulation mode through a circulation pipe (18), a circulation pore passage and a pump shaft.
9. The permanent magnet bearing magnetic pump according to claim 8, wherein the outer surface of the pump shaft (4) is axially provided with a circulation groove (24), the circulation groove (24) is communicated with a circulation duct, and the inner surface of the permanent magnet rotor (5) covers the circulation groove (24).
10. The permanent magnet bearing magnetic pump according to claim 8, wherein the pump shaft (4) is further provided with a protective bearing assembly, the protective bearing assembly comprises a protective bearing (14) respectively embedded in the connecting body (2) and the pump cover (8), and a protective shaft sleeve (15) sleeved on the pump shaft (4);
the clearance between the protection shaft sleeve (15) and the protection bearing (14) is smaller than the clearance between the permanent magnet rotor (5) and the permanent magnet stator (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122929995.8U CN216589155U (en) | 2021-11-26 | 2021-11-26 | Permanent magnet bearing magnetic pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122929995.8U CN216589155U (en) | 2021-11-26 | 2021-11-26 | Permanent magnet bearing magnetic pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216589155U true CN216589155U (en) | 2022-05-24 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122929995.8U Active CN216589155U (en) | 2021-11-26 | 2021-11-26 | Permanent magnet bearing magnetic pump |
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| Country | Link |
|---|---|
| CN (1) | CN216589155U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115247650A (en) * | 2022-07-28 | 2022-10-28 | 瑞希特(浙江)科技股份有限公司 | Full permanent magnetism suspension bearing magnetic drive pump |
-
2021
- 2021-11-26 CN CN202122929995.8U patent/CN216589155U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115247650A (en) * | 2022-07-28 | 2022-10-28 | 瑞希特(浙江)科技股份有限公司 | Full permanent magnetism suspension bearing magnetic drive pump |
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