CN112483455A - Method for improving transmission efficiency of multistage immersed pump and suspended multistage immersed pump - Google Patents
Method for improving transmission efficiency of multistage immersed pump and suspended multistage immersed pump Download PDFInfo
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- CN112483455A CN112483455A CN202110061322.7A CN202110061322A CN112483455A CN 112483455 A CN112483455 A CN 112483455A CN 202110061322 A CN202110061322 A CN 202110061322A CN 112483455 A CN112483455 A CN 112483455A
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- base
- thrust disc
- magnetic steel
- suspended
- multistage
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Classifications
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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
- F04D29/04—Shafts or bearings, or assemblies thereof
- F04D29/041—Axial thrust balancing
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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
- F04D13/08—Units comprising pumps and their driving means the pump being electrically driven for submerged use
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02N—ELECTRIC MACHINES NOT OTHERWISE PROVIDED FOR
- H02N15/00—Holding or levitation devices using magnetic attraction or repulsion, not otherwise provided for
Abstract
The invention relates to a method for improving the transmission efficiency of a multistage immersed pump and a suspended multistage immersed pump. The rotary friction resistance and friction loss between the thrust disc and the base are eliminated, and the transmission efficiency of the multistage immersed pump is improved; avoid thrust dish wearing and tearing, extension thrust dish life is short, reduces the running cost.
Description
Technical Field
The invention relates to the field of fluid machinery, in particular to a method for improving the transmission efficiency of a multistage immersed pump and a suspended multistage immersed pump.
Background
When the multistage immersed pump works, the impeller conveys liquid from the suction inlet to the outlet, the gravity and the pressure of the lifted liquid act on the impeller to generate axial force, and the axial force is transmitted to the pump body or the base through the impeller and the pump shaft, so that a thrust disc is required to be arranged on the pump shaft and is in rotating contact with the base, and the axial force is balanced by the support of the base on the thrust disc. When the thrust disc rotates, frictional resistance is generated between the thrust disc and the base. Because the multi-stage immersed pump has high lift and high pressure, the friction resistance between a thrust disc and a base of the multi-stage immersed pump is high, and the friction loss is high, so that the transmission efficiency of the multi-stage immersed pump is low; meanwhile, the thrust disc is seriously abraded and has short service life. Therefore, reducing the frictional resistance between the thrust disc and the base is one way to improve the transmission efficiency of the multistage immersed pump.
Through patent retrieval, the following patents mainly exist, which have a certain relationship with the invention:
1. the magnetic suspension wind power submersible pump comprises a pump body, a pump cover, an impeller, a driving shaft, a wind power driving blade, a magnetic suspension device, a magnetic suspension bearing and a pump frame. The magnetic suspension device is composed of a shell, a magnetic suspension block, permanent magnets and adjusting screws among magnetic poles, the permanent magnets with the same magnetic poles opposite to each other are respectively embedded in the positions, corresponding to the shell, of the magnetic suspension block, homopolar repulsion force is generated, the adjusting screws among the magnetic poles are screwed into the shell, the adjusting screws among the magnetic poles abut against the permanent magnets arranged on the shell, the suspension device is fixed on a pump cover through the shell of the suspension device, a driving shaft penetrates through the magnetic suspension block and is fixed with the magnetic suspension block, the bottom end of the driving shaft is fixed with an impeller, the top end of the driving shaft is connected with a wind power driving blade, magnetic suspension bearings are respectively arranged on the upper portion and the lower portion between the impeller and the magnetic suspension block, the outer ring of each magnetic suspension bearing is embedded on the pump cover, the inner ring is embedded on the driving. However, in the patent, the magnetic bearing supporting device plays a role of radial positioning support.
2. The invention relates to Chinese invention patents with the application number of CN200910212704.4, the application date of 2009.10.30, the publication number of CN101705938A, the publication number of 2010.05.12, the name of magnetic suspension axial thrust device of a motor screw pump and the application name of Jiangsu university, and relates to the electromechanical field. The invention extends the head of any end of the rotor of the motor screw pump along the axial direction, and the extended part protrudes along the radial direction. Permanent magnets are embedded in the radial projections. The polarities of the permanent magnets are respectively consistent along the axial direction of the rotor. Permanent magnets with the same magnetic induction intensity are embedded in the screw pump shell opposite to the two ends of the protruding part, and the polarity of the permanent magnets in the pump body is respectively the same as or opposite to that of the permanent magnets at the two ends of the protruding part of the rotor opposite to the permanent magnets. Therefore, the property that like poles of the magnets repel or attract each other can be utilized, the rotor is axially fixed through force balance and is in a suspension state, friction between the rotor and a pump body is avoided, energy loss is reduced, and the rotor is not influenced to rotate around a shaft. However, in the patent, the magnetic suspension device is used for axial positioning of the screw pump, which is different from the technical field of the application.
3. The utility model has the application number of 201721282840.7, the application date of 2017.09.30, the publication number of CN 209361471U, the publication date of 2019.09.10, the name of high-end equipment research institute of Tianjin of Qinghua university and the applicant of high-end equipment research institute of Tianjin of Qinghua university, the utility model provides a novel single-degree-of-freedom magnetic suspension centrifugal impeller, which comprises a static part and an impeller rotor, wherein the static part is a shell, a pump inlet and a pump outlet are arranged on the shell, the impeller rotor comprises blades and a cylindrical boss which are arranged inside the shell, the blades are uniformly arranged along the circumferential direction of the upper surface of the boss, a cylindrical through hole is formed in the center of the boss, a guide cover is arranged above the through hole, the edge of the guide cover is connected with the front edge of the blades, a plurality of first cavities are formed in the outer side of the through hole along the circumferential direction of the boss, and first magnets are arranged in the first cavities; the lower part of shell is provided with the tray, and its inside has seted up a plurality of second cavities, installs the second magnet in the second cavity, first cavity and second cavity correspond the setting from top to bottom. Centrifugal impeller can guarantee that blood moves in closed circuit, avoid lubricated, sealed and blood pollution problem.
4. The utility model discloses a utility model patent of application number "CN200920166745. X", application date "2009.08.13", publication number "CN 201475031U", publication date "2010.05.19", the name is "magnetic suspension bearing strutting arrangement of vertical water pump", the applicant is "Lanzhou reason worker university", this magnetic suspension bearing strutting arrangement of vertical water pump, including the pump body 8 of vertical water pump, its characteristics are still including: the rotating main shaft 3 of the vertical water pump is provided with a permanent magnet mixed magnetic suspension bearing device 7, and the permanent magnet mixed magnetic suspension bearing device 7 is connected with a magnetic suspension bearing control device. The permanent magnet hybrid magnetic suspension bearing device 7 is multiple, the permanent magnet hybrid magnetic suspension bearing device 7 comprises a permanent magnet hybrid magnetic suspension bearing 1, and the permanent magnet hybrid magnetic suspension bearing 1 is installed on a pump body 8 of the vertical water pump through a bearing seat 2. The static bias magnetic field generated by the electromagnet in the active magnetic suspension bearing is replaced by the magnetic field generated by the permanent magnet, so that the power consumption of the power amplifier is reduced, the volume of the magnetic suspension bearing is reduced, and the bearing capacity is improved. However, in the utility model, the magnetic suspension bearing supporting device plays a role of radial positioning support.
5. The utility model discloses a utility model patent that application number is "CN 201120316353.4", application date is "2011.08.29", the publication number is "CN 202194850U", the publication date is "2012.04.18", the name is "vertical axial-flow pump thrust bearing", the applicant is "Wu Guangxiang", this utility model discloses a vertical axial-flow pump thrust bearing belongs to axial-flow pump technical field, including the thrust bearing below motor rotor and the motor support, wherein thrust bearing is magnetic suspension bearing. However, in the utility model, the magnetic suspension bearing supporting device plays a role of radial positioning support.
6. The utility model belongs to a device that liquid pressure increases in the magnetic suspension high-speed rotating rotor centrifugal force field, and turns into kinetic energy through stagnation pipeline and can further pressurize, this pump is divided into four bibliographic categories: (1) the device comprises an upper magnetic support, (2) a rotor assembly, (3) a material pipe assembly, (4) an outer sleeve, a medium-frequency power supply, a motor, a vacuum pump and the like, wherein the outer sleeve, the medium-frequency power supply, the motor and the vacuum pump provide power, safety and loss-reducing synergistic systems.
7. The utility model discloses a utility model patent that application number is "CN 201120304202.7", application date is "2011.08.19", publication number is "CN 202301064U", publication date is "2012.07.04", the name is "magnetic suspension rotary drum formula liquid booster pump", the applicant is "wudysprosium", this utility model discloses a magnetic suspension rotary drum formula liquid booster pump, include to be provided with the sleeve lid at outer telescopic top, be provided with the motor at outer telescopic lower extreme, the lower extreme of motor shaft passes through the bearing ball socket of thrust ball bearing and sits in the bearing ball socket of motor support. The material pipe assembly comprises a feeding pipe and a discharging pipe, an impeller is arranged in an upper rotary drum, the impeller is movably sleeved on the vertical section of the discharging pipe, a feeding port is communicated with the feeding pipe, an upper magnetic support is arranged on the outer circle of a centering ball bearing between a sleeve cover and the upper rotary drum, the upper magnetic support comprises axially magnetized annular magnetic steel, an upper magnetic conductive ring and a lower magnetic conductive ring, and the annular magnetic steel is arranged on a non-magnetic steel tray.
None of the above patents relate to the technical problems of frictional resistance and frictional resistance loss between the thrust disk and the base, nor to the technical problems of wear and service life of the thrust disk.
Disclosure of Invention
The invention aims to solve the technical problem of providing a method for improving the transmission efficiency of a multistage immersed pump and a suspension multistage immersed pump aiming at the defects in the prior art.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows: a method for improving the transmission efficiency of a multistage immersed pump comprises the following steps: the axial force is transmitted by a magnetic suspension mode to reduce the rotation resistance of the thrust disc and improve the transmission efficiency of the multistage immersed pump.
Furthermore, magnetic steel is arranged between the thrust disc and the base, and repulsion force is generated between the thrust disc and the base by utilizing homopolar repulsion of the magnetic steel, so that a gap is generated between the thrust disc and the base, and the thrust disc is suspended on the base.
The invention also relates to a suspension type multistage immersed pump for realizing the method, which comprises the following steps: the pump body, stator, rotor, pivot, impeller, base and thrust disc, the thrust disc rotates and sets up between pivot and base, its characterized in that: and repulsive force exists between the thrust disc and the base, so that a gap exists between the thrust disc and the base. The rotary friction resistance and friction loss between the thrust disc and the base are eliminated, and the transmission efficiency of the multistage immersed pump is improved; avoid thrust dish wearing and tearing, extension thrust dish life is short, reduces the running cost.
Further, be provided with the thrust disc magnet steel on the thrust disc, be provided with the base magnet steel on the base, the thrust disc magnet steel is the same towards the magnetism of base magnet steel one side with the base magnet steel towards the thrust disc magnet steel for thrust disc and base produce the repulsion force, realize that thrust disc and base form the clearance, realize the effect of thrust disc suspension, eliminate the rotational friction resistance between thrust disc and the base.
Furthermore, the thrust disc magnetic steel and the base magnetic steel are made of neodymium iron boron permanent magnet materials, so that strong magnetic force is generated, and the multistage immersed pump with large axial force is suitable.
Furthermore, the thrust disc is provided with the thrust disc recess towards the base one side, and the thrust disc magnet steel inlays in the thrust disc recess to the protection thrust disc magnet steel avoids being damaged by the collision.
Furthermore, a thrust disc magnetic steel protective layer covers one surface, facing the base magnetic steel, of the thrust disc magnetic steel to protect the thrust disc magnetic steel.
Further, base magnet steel is provided with the base recess towards thrust disc magnet steel one side, and base magnet steel inlays in the base recess to protection base magnet steel avoids being damaged by the collision.
Further, a base magnetic steel protective layer covers one surface, facing the thrust disc magnetic steel, of the base magnetic steel to protect the base magnetic steel.
Furthermore, the thrust disc magnetic steel protective layer or the base magnetic steel protective layer is made of epoxy resin.
The invention has the beneficial effects that: through the mode of setting up the magnet steel on thrust dish and base, utilize the magnet steel homopolar repulsion, produce the repulsion between thrust dish and base, make to produce the clearance between thrust dish and the base for the thrust dish suspends on the base. The rotary friction resistance and friction loss between the thrust disc and the base are eliminated, and the transmission efficiency of the multistage immersed pump is improved; avoid thrust dish wearing and tearing, extension thrust dish life is short, reduces the running cost.
Drawings
Figure 1 is a schematic cross-sectional view of a multi-stage pump,
figure 2 is a partial enlarged view of a in the prior art,
FIG. 3 is a partially enlarged view of an embodiment A of the present invention,
FIG. 4 is an enlarged view of a portion B of FIG. 3,
in the figure: the centrifugal pump comprises a pump body 1, a stator 2, a rotor 3, a rotating shaft 4, an impeller 5, a thrust disc 6, a thrust disc groove 61, a thrust disc magnetic steel 62, a thrust disc magnetic steel protective layer 63, a base 7, a base groove 71, a base magnetic steel 72, a base magnetic steel protective layer 73, an axial force F, a magnetic south pole N and a magnetic north pole S.
Detailed Description
The invention is further described by the following specific embodiments in conjunction with the attached drawings:
as shown in fig. 1: a multi-stage submersible pump comprising: the pump body 1, stator 2, rotor 3, pivot 4, impeller 5, base 7 and thrust disc 6. The rotor 3 and the impeller 5 are coaxially arranged on a rotating shaft 4, and the rotating shaft 4 is rotatably connected with a base 7. The thrust disc 6 is fixed at the lower end of the rotating shaft 4, and the rotor 3 drives the impeller 5 and the thrust disc 6 to rotate through the rotating shaft 4.
The thrust disc 6 of the existing multistage immersed pump is partially shown in fig. 2: when the multistage immersed pump works, the impeller 5 conveys liquid from the suction inlet to the outlet, the gravity and the pressure of the lifted liquid act on the impeller 5 to generate an axial force F, the axial force F is transmitted to the pump body 1 or the base 7 through the impeller 5 and the pump shaft 4, the thrust disc 6 is in rotating contact with the base 7, and the axial force F is balanced by the support of the base 7 on the thrust disc 6. When the thrust disk 6 is rotated, an axial force F is applied between the thrust disk 6 and the base 7, and therefore, a rotational frictional resistance is generated. Because the multi-stage immersed pump has high lift and high pressure, the friction resistance between the thrust disc 6 and the base 7 of the multi-stage immersed pump is large, and the friction loss is high, so that the transmission efficiency of the multi-stage immersed pump is low; meanwhile, the thrust disc 6 is also seriously abraded and needs to be frequently replaced, so that the utilization rate of the multistage immersed pump is reduced, and the running cost is increased.
The thrust disc 6 of the multistage immersed pump according to the invention is partially shown in figures 3 and 4: one side of the thrust disc 6 facing the base 7 is provided with a thrust disc groove 61, the thrust disc magnetic steel 62 is fixed in the thrust disc groove 61 in a tight fit or bonding mode, so that the magnetic north pole S of the thrust disc magnetic steel 62 faces the base 7, and the lower surface of the thrust disc magnetic steel 62 facing the magnetic north pole S of the base 7 is coated with epoxy resin to form a thrust disc magnetic steel protective layer 63. Because the thrust disc magnet steel 62 is embedded in the thrust disc groove 61, the lower surface is covered with the epoxy resin protective layer of magnetic conduction, can avoid the thrust disc magnet steel 62 to damage because of the collision.
The thrust disc magnet steel 62 and the base magnet steel 72 are disc-shaped and are made of strong magnetic neodymium iron boron permanent magnet material. Because the magnetic north pole S of the thrust disk magnetic steel 62 faces the magnetic north pole S of the base magnetic steel 72, or the magnetic south pole N of the thrust disk magnetic steel 62 faces the magnetic south pole N of the base magnetic steel 72, a strong repulsive force can be generated between the thrust disk magnetic steel 62 and the base magnetic steel 72 to balance the axial force F. The thrust disc 6 is pushed upwards, so that the thrust disc 6 is separated from the base 7, the thrust disc 6 is in a suspension state, the rotation friction resistance and friction loss between the thrust disc and the base are eliminated, and the transmission efficiency of the multistage immersed pump is improved; avoid thrust dish wearing and tearing, extension thrust dish life is short, reduces the running cost.
In summary, the following steps: the invention has the beneficial effects that: through the mode of setting up the magnet steel on thrust dish and base, utilize the magnet steel homopolar repulsion, produce the repulsion between thrust dish and base, make to produce the clearance between thrust dish and the base for the thrust dish suspends on the base. The rotary friction resistance and friction loss between the thrust disc and the base are eliminated, and the transmission efficiency of the multistage immersed pump is improved; avoid thrust dish wearing and tearing, extension thrust dish life is short, reduces the running cost.
The above embodiments are provided for illustrative purposes only and not for limiting the present invention, and those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention, and therefore all equivalent technical solutions should fall within the scope of the present invention, and the scope of the present invention should be defined by the claims.
Claims (10)
1. A method for improving the transmission efficiency of a multistage immersed pump is characterized in that: the axial force is transmitted by a magnetic suspension mode to reduce the rotation resistance of the thrust disc and improve the transmission efficiency of the multistage immersed pump.
2. The method of improving the efficiency of a multistage submersible pump transmission of claim 1, wherein: the magnetic steel is arranged between the thrust disc and the base, and the repulsion force is generated between the thrust disc and the base by utilizing the repulsion of the same poles of the magnetic steel, so that a gap is generated between the thrust disc and the base, and the thrust disc is suspended on the base.
3. A suspended multi-stage immersed pump for implementing the method for improving the transmission efficiency of a multi-stage immersed pump according to claim 1 or 2, comprising: the pump body (1), stator (2), rotor (3), pivot (4), impeller (5), base (7) and thrust disc (6), thrust disc (6) rotate to set up between pivot (4) and base (7), its characterized in that: repulsive force exists between the thrust disc (6) and the base (7), so that a gap exists between the thrust disc (6) and the base (7).
4. The suspended multistage submersible pump according to claim 3, wherein: be provided with thrust disc magnet steel (62) on thrust disc (6), be provided with base magnet steel (72) on base (7), thrust disc magnet steel (62) are towards base magnet steel (72) one side the same with the magnetism of base magnet steel (72) towards thrust disc magnet steel (62) one side.
5. The suspended multistage submersible pump according to claim 4, wherein: the thrust disc magnetic steel (62) and the base magnetic steel (72) are made of neodymium iron boron permanent magnet materials.
6. The suspended multistage submersible pump according to claim 5, wherein: one side of the thrust disc (6) facing the base (7) is provided with a thrust disc groove (61), and the thrust disc magnetic steel (62) is embedded in the thrust disc groove (61).
7. The suspended multistage submersible pump according to claim 6, wherein: one surface of the thrust disc magnetic steel (62) facing the base magnetic steel (72) is covered with a thrust disc magnetic steel protective layer (63).
8. The suspended multistage submersible pump according to claim 7, wherein: base magnet steel (72) are provided with base recess (71) towards thrust disc magnet steel (62) one side, and base magnet steel (72) inlay in base recess (71).
9. The suspended multistage submersible pump according to claim 8, wherein: one surface of the base magnetic steel (72) facing the thrust disc magnetic steel (62) is covered with a base magnetic steel protective layer (73).
10. A suspended multistage immersed pump according to claim 7 or claim 9, wherein: the thrust disc magnetic steel protective layer (63) or the base magnetic steel protective layer (73) adopts epoxy resin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110061322.7A CN112483455A (en) | 2021-01-18 | 2021-01-18 | Method for improving transmission efficiency of multistage immersed pump and suspended multistage immersed pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110061322.7A CN112483455A (en) | 2021-01-18 | 2021-01-18 | Method for improving transmission efficiency of multistage immersed pump and suspended multistage immersed pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112483455A true CN112483455A (en) | 2021-03-12 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110061322.7A Pending CN112483455A (en) | 2021-01-18 | 2021-01-18 | Method for improving transmission efficiency of multistage immersed pump and suspended multistage immersed pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112483455A (en) |
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2021
- 2021-01-18 CN CN202110061322.7A patent/CN112483455A/en active Pending
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