CN214742123U

CN214742123U - Surface-mounted self-starting pipeline pump driven by permanent magnet synchronous motor

Info

Publication number: CN214742123U
Application number: CN202120229054.0U
Authority: CN
Inventors: 周磊; 林海; 叶云岳
Original assignee: Taizhou Chengchang Technology Co ltd
Current assignee: Taizhou Chengchang Technology Co ltd
Priority date: 2021-01-27
Filing date: 2021-01-27
Publication date: 2021-11-16
Anticipated expiration: 2031-01-27

Abstract

The utility model discloses a surface-mounted self-starting permanent magnet synchronous motor driven pipeline pump, which comprises a pump body, an impeller, a pump cover, a bracket and a casing, wherein a rotor shaft is axially arranged in the casing, and a rotor assembly is sleeved on the rotor shaft; the rotor assembly comprises a rotor sleeved on the rotor shaft, and a plurality of permanent magnet magnetic shoes are attached to the outer circumference of the rotor; the stator assembly matched with the rotor assembly is further arranged in the shell and is formed by combining at least two stator units in a fan-shaped structure; one end of the rotor shaft, which is far away from the rotor assembly, sequentially penetrates through the support and the pump cover and extends into the pump body to be connected with the impeller; the pipeline pump is simple and compact in structure, easy to assemble and maintain, low in cost, capable of being used in various working conditions needing self-starting and compact in structure, free of intermediate conversion link, capable of directly acting on the rotor shaft to drive the impeller to rotate, high in rotating thrust, high in motor efficiency and low in energy consumption.

Description

Surface-mounted self-starting pipeline pump driven by permanent magnet synchronous motor

Technical Field

The utility model relates to PMSM technical field, concretely relates to table pastes formula self-starting PMSM driven tubing pump.

Background

The pipeline pump is a single-suction single-stage or multi-stage centrifugal pump, belongs to a vertical structure, and is named as a pipeline pump (also called a booster pump) because the inlet and the outlet of the pipeline pump are on the same straight line, have the same caliber as the inlet and the outlet, can be installed at any position of the pipeline like a section of pipeline. The structure is characterized in that: the single-suction single-stage centrifugal pump is a vertical pump, and the inlet and the outlet of the single-suction single-stage centrifugal pump are identical and are on the same straight line and are orthogonal to the central line of the shaft.

The pipeline pump is usually provided with a motor driving structure, and the traditional motor structure is complex in structure, such as materials, a transmission system and the like; also, a permanent magnet motor is adopted for driving, and China with publication number CN204827949U specially used for 2015, 12 and 2 discloses a pipeline pump, wherein a structure form of a built-in motor is adopted, and a cooling water flow channel is arranged between a pump body and a motor shell, so that heat emitted from the interior of the motor is taken away while water flows, the normal working temperature of the motor is maintained, and a sealant can completely and hermetically seal the motor shell, so that a motor body cannot be influenced by water flow. However, the pipeline pump of the patent is driven by a direct-current permanent magnet motor, and in order to ensure that the condition of liquid leakage does not occur in the motor, the sealing requirement is very high, and the difficulty of installation and layout is higher.

Disclosure of Invention

The utility model aims at providing a table pastes formula self-starting PMSM driven tubing pump to the problem that prior art exists.

In order to achieve the above object, the utility model adopts the following technical scheme:

the surface-mounted self-starting pipeline pump driven by the permanent magnet synchronous motor comprises a pump body, wherein an impeller is arranged in the pump body, a pump cover is arranged on the pump body, a support is arranged on the pump cover, a casing is arranged on the support, a rotor shaft is axially arranged in the casing, and a rotor assembly is sleeved on the rotor shaft; the rotor assembly comprises a rotor sleeved on the rotor shaft, a plurality of permanent magnet magnetic shoes are pasted on the outer circumference of the rotor, the permanent magnet magnetic shoes are of a split arc-shaped plate structure, and at least one circle of magnetic shoe anchor ear is arranged outside each permanent magnet magnetic shoe; the stator assembly is matched with the rotor assembly and is formed by combining at least two stator units in a fan-shaped structure, each stator unit comprises a stator core and a stator winding wound on the stator core, each stator unit is independently controlled, the stator cores are arranged in the shell, and the permanent magnet magnetic shoes are arranged opposite to the stator windings; one end of the rotor shaft, which is far away from the rotor assembly, sequentially penetrates through the support and the pump cover and extends into the pump body to be connected with the impeller.

The pipeline pump is simple and compact in structure, easy to assemble and maintain, low in cost, capable of being used in various working conditions needing self-starting and compact in structure, reducing the arrangement of a reduction gear, a complex transmission system and a lubricating system, free of intermediate conversion link, capable of directly acting on a rotor shaft to drive an impeller to rotate, high in rotating thrust, high in motor efficiency, low in energy consumption and easy to control the rotating speed. When the permanent magnet synchronous motor is electrified, the permanent magnet magnetic shoe provides a radial rotating magnetic field for the stator core, so that the stator component provides axial rotating torque for the rotor, and the rotor shaft and the impeller are directly driven to work.

The permanent magnet magnetic shoe can be fixed on the rotor by adopting a surface-mounted mode and matching with the structure of the permanent magnet magnetic shoe, so that the use of small fasteners such as screws is reduced, drilling, slotting and the like on the permanent magnet magnetic shoe are also avoided, the complete structure of the magnetic shoe is maintained, and the magnetic field is favorably formed and the magnetic drive effect is improved.

The permanent magnet magnetic shoe adopts split type structure, and the loading and unloading and independent adjustment of being convenient for, the setting of magnetic shoe staple bolt can further improve the fastening degree and the installation stability of permanent magnet magnetic shoe, its displacement change is also less in long-term work, and also can keep better with the clearance between stator module.

Stator module also is modular structure, and when one of them certain stator unit (stator core or corresponding stator winding) damages, then change one of them stator core or stator winding alone can to the maintenance and the nursing of the equipment of being more convenient for.

Furthermore, a clamping groove is formed in the outer circumference of the rotor, the inner side of the permanent magnet magnetic shoe is clamped in the clamping groove, and a glue layer is arranged between the permanent magnet magnetic shoe and the clamping groove.

The clamping groove can clamp the permanent magnet magnetic shoe, and can play a role of pre-fixing during adhesion, so that adhesion and fixation are facilitated; the axial and circumferential limiting function can be achieved at the later stage.

Furthermore, the clamping groove is an arc-shaped groove, the thickness of the arc-shaped groove is far smaller than that of the permanent magnet magnetic shoe, namely, the arc-shaped groove is a shallower groove, and the arrangement can reduce the processing amount of the rotor and reduce the processing cost and time; the glue layer is coated viscose, the viscose is industrial glue, such as high-temperature magnetic shoe bonding glue, and the adhesive has better bonding strength at high temperature.

Further, the permanent magnet magnetic shoe is ferrite magnetic shoe and/or neodymium iron boron magnetic shoe, the permanent magnet magnetic shoe is at least a pair of symmetry setting. The symmetrical arrangement can reduce the interference of magnetic fields generated between the adjacent magnetic shoes, and the whole structure is symmetrical, thereby being beneficial to the stable rotation of the rotor shaft.

Furthermore, the magnetic shoe hoop is circumferentially arranged at the middle position of the rotor assembly, the magnetic shoe hoop fastens a plurality of permanent magnet magnetic shoes and is fixedly connected with the rotor in a threaded manner, and the threaded position is arranged at the gap between the adjacent permanent magnet magnetic shoes. Such setting has utilized the rotor clearance space between adjacent magnetic shoe on the one hand, and on the other hand can further improve the fastening ability of magnetic shoe staple bolt avoids the displacement of magnetic shoe staple bolt.

Further, the stator core is of a fan-shaped disc-shaped or fan-shaped columnar structure; and the stator iron core is respectively screwed on the shell and/or the bracket. The casing or the bracket is directly used as the stator base, so that the structure in the casing is more compact, and the volume of the motor is smaller.

Furthermore, the rotor and the rotor shaft are in an integrally formed structure, and although the arrangement increases the processing amount of the rotor shaft, the integration degree is higher and the stability is better; or the rotor is connected with the rotor shaft through a flat key, the flat key has strong inter-shaft connection capacity, the related technology is mature, and the cost is lower; the rotor shaft is a multi-stage stepped shaft, and the upper end part of the rotor shaft is in bearing connection with the shell and the bracket respectively; the lower end of the rotor shaft is in threaded connection with the impeller or is welded and fixed with the impeller, and multiple mechanical seals are arranged between the rotor shaft and the pump cover.

The arrangement of the multistage stepped shafts is adopted, so that the bearings can be clamped stably and the bearing has better layering; the arrangement of multiple mechanical seals can improve the effect of rotary seal and avoid liquid leakage.

Further, the casing is fixed on the bracket in a threaded manner, and the bracket is of a hollow structure; the pump cover is provided with an annular cavity, and a water retaining ring is arranged at the cavity of the rotor shaft in the pump cover, so that liquid can be prevented from moving upwards along with the shaft.

Compared with the prior art, the beneficial effects of the utility model are that: 1. the pipeline pump has the advantages of simple and compact structure, easy assembly and maintenance, lower cost, no intermediate conversion link, direct action of the rotor on the rotor shaft to drive the impeller to rotate, high rotating thrust, high motor efficiency, low energy consumption and easy control of the rotating speed, and can be used in various working conditions requiring self-starting and compact structure; 2. the permanent magnet magnetic shoe can be fixed on the rotor by adopting a surface-mounted mode and matching with the structure of the permanent magnet magnetic shoe, so that the use of small fasteners such as screws is reduced, the drilling, slotting and the like on the permanent magnet magnetic shoe are avoided, the complete structure of the magnetic shoe is maintained, the formation of a magnetic field is facilitated, and the magnetic driving effect is improved; 3. the permanent magnet magnetic shoe adopts a split structure, so that the mounting and the dismounting and the independent adjustment are convenient, and the fastening degree and the mounting stability of the permanent magnet magnetic shoe can be further improved due to the arrangement of the magnetic shoe hoop; 4. stator module also is modular structure, and when one of them certain stator unit damages, then change one of them stator core or stator winding alone can to the maintenance and the nursing of the equipment of being more convenient for.

Drawings

Fig. 1 is an overall schematic view of a surface-mounted self-starting pmsm-driven pipeline pump of the present invention;

FIG. 2 is a schematic diagram of a cross-sectional structure of a motor of a surface-mounted self-starting PMSM-driven pipeline pump according to the present invention;

FIG. 3 is a schematic structural diagram of a rotor assembly of a surface-mounted self-starting PMSM (permanent magnet synchronous motor) driven pipeline pump according to the present invention;

FIG. 4 is a schematic cross-sectional view taken along line A-A of FIG. 3;

FIG. 5 is a schematic structural view of another rotor assembly of the surface-mounted self-starting PMSM-driven pipeline pump of the present invention;

in the figure: 1. a pump body; 2. an impeller; 3. a pump cover; 4. a support; 5. a housing; 6. a rotor shaft; 7. a rotor assembly; 701. a rotor; 702. a permanent magnet magnetic shoe; 703. a magnetic shoe hoop; 704. a glue layer; 705. a fastener; 706. a clamping groove; 8. a stator assembly; 801. a stator core; 802. a stator winding; 9. a bearing; 10. mechanical sealing; 11. a water retaining ring.

Detailed Description

The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are only some embodiments, not all embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "middle", "upper", "lower", "left", "right", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

The first embodiment is as follows:

as shown in fig. 1 to 3, a surface-mounted self-starting pipeline pump driven by a permanent magnet synchronous motor comprises a pump body 1, wherein an impeller 2 is arranged in the pump body 1, a pump cover 3 is arranged on the pump body 1, a support 4 is arranged on the pump cover 3, a casing 5 is arranged on the support 4, a rotor shaft 6 is axially arranged in the casing 5, and a rotor assembly 7 is sleeved on the rotor shaft 6; the rotor assembly 7 comprises a rotor 701 sleeved on the rotor shaft 6, a plurality of permanent magnet magnetic shoes 702 are pasted on the outer circumference of the rotor 701, the permanent magnet magnetic shoes 702 are of a split arc-shaped plate structure, and a circle of magnetic shoe anchor ear 703 is arranged outside the permanent magnet magnetic shoes 702; the machine shell 5 is further internally provided with a stator assembly 8 matched with the rotor assembly 7, the stator assembly 8 is formed by combining at least two stator units in a sector structure, each stator unit comprises a stator core 801 and a stator winding 802 wound on the stator core 801, each stator unit is independently controlled, the stator core 801 is arranged in the machine shell 5, and the permanent magnet magnetic shoe 702 is arranged opposite to the stator winding 802; one end of the rotor shaft 6, which is far away from the rotor assembly 7, sequentially penetrates through the support 4 and the pump cover 3 and extends into the pump body 1 to be connected with the impeller 2.

The pipeline pump is simple and compact in structure, easy to assemble and maintain, low in cost, capable of being used in various working conditions needing self-starting and compact in structure, reducing the arrangement of a reduction gear, a complex transmission system and a lubricating system, free of an intermediate conversion link, capable of directly acting on the rotor shaft 6 through the rotor 701 to drive the impeller 2 to rotate, high in rotating thrust, high in motor efficiency, low in energy consumption and easy to control the rotating speed. When the permanent magnet synchronous motor is powered on, the permanent magnet magnetic shoe 702 provides a radially rotating magnetic field for the stator core 801, so that the stator assembly 8 is prompted to provide a torque with a rotating axis for the rotor 701, and the rotor shaft 6 and the impeller 2 are directly driven to work.

By adopting a surface-mounted mode and matching with the structure of the permanent magnet magnetic shoe, the permanent magnet magnetic shoe 702 can be fixed on the rotor 701, the use of small fasteners such as screws is reduced, drilling, slotting and the like on the permanent magnet magnetic shoe are also avoided, the complete structure of the magnetic shoe is maintained, and the magnetic field is favorably formed and the magnetic driving effect is improved.

The permanent magnet magnetic shoe 702 adopts a split structure, is convenient to assemble, disassemble and independently adjust, and the arrangement of the magnetic shoe hoop 703 can further improve the fastening degree and the installation stability of the permanent magnet magnetic shoe, the displacement change of the permanent magnet magnetic shoe is less in long-term work, and the gap between the permanent magnet magnetic shoe and the stator assembly can be kept better.

Stator module 8 also is modular structure, and when one of them certain stator unit (stator core or corresponding stator winding) damages, then change one of them stator core or stator winding alone can to the maintenance and the nursing of the equipment of being more convenient for.

Further, as shown in fig. 4, a clamping groove 706 is formed in an outer circumference of the rotor 701, and an adhesive layer 704 is disposed between the inner side of the permanent magnet shoe 702 clamped in the clamping groove 706 and the clamping groove 706.

The clamping groove 706 can clamp the permanent magnet shoe 702, and can play a role of pre-fixing during bonding, so that the bonding and fixing are facilitated; the axial and circumferential limiting function can be achieved at the later stage.

Furthermore, the clamping groove 706 is an arc-shaped groove, and the thickness of the arc-shaped groove is far smaller than that of the permanent magnet magnetic shoe 702, namely, a shallower groove, so that the processing amount of the rotor can be reduced, and the processing cost and time can be reduced; the glue layer 704 is a coated glue, and the glue is an industrial glue, such as a high temperature magnetic shoe glue, which has better adhesive strength at high temperature.

Furthermore, the permanent magnet magnetic shoe 702 is a ferrite magnetic shoe, so that the cost is lower, and the permanent magnet magnetic shoe is suitable for working conditions with not very high requirements; the permanent magnet tiles 702 are a pair symmetrically arranged. The symmetrical arrangement can reduce the interference of magnetic fields generated between the adjacent magnetic shoes, and the whole structure is symmetrical, thereby being beneficial to the stable rotation of the rotor shaft.

Further, the magnetic shoe hoop 703 is circumferentially arranged at the middle position of the rotor assembly 7, the magnetic shoe hoop 703 fastens the plurality of permanent magnet magnetic shoes 702 and is in threaded connection with the rotor 701 through a fastener 705, and the threaded connection position is arranged at a gap between adjacent permanent magnet magnetic shoes 702. Such setting has utilized the rotor clearance space between adjacent magnetic shoe on the one hand, and on the other hand can further improve the fastening ability of magnetic shoe staple bolt avoids the displacement of magnetic shoe staple bolt.

Further, the stator core 801 is of a sector columnar structure; the stator cores 801 are respectively screw-coupled to the inner circumference of the casing 5. The casing 5 is directly used as a stator base, so that the structure in the casing is more compact, and the volume of the motor is smaller.

Furthermore, the rotor 701 is connected with the rotor shaft 6 through a flat key, and the flat key connection has strong inter-shaft connection capacity, so that the related technology is mature, and the cost is lower; the rotor shaft 6 is a multistage stepped shaft, and the upper end part of the rotor shaft 6 is connected with the shell 5 and the bracket 4 through bearings 9 respectively; the lower end part of the rotor shaft 6 is fixedly connected with the impeller 2 in a threaded manner, and multiple mechanical seals 10 are arranged between the rotor shaft 6 and the pump cover 3.

The arrangement of the multistage stepped shafts is adopted, so that the bearings 9 can be clamped stably and the arrangement has good layering; the arrangement of the multiple mechanical seals 10 can improve the effect of the rotary seal and avoid liquid leakage.

Further, the casing 5 is fixed on the bracket 4 in a threaded manner, and the bracket 4 is of a hollow structure; the pump cover 3 is provided with an annular cavity, the rotor shaft 6 is positioned in the cavity of the pump cover 3 and is provided with a water retaining ring 11, and liquid can be prevented from moving upwards along with the shaft.

Example two:

the difference between the present embodiment and the first embodiment is that another structure of the rotor assembly is provided.

As shown in fig. 5, the permanent magnet tiles 702 are five symmetrically arranged at the center, a gap is formed between adjacent permanent magnet tiles 702, and the magnetic tile anchor ears 703 are connected with the rotor 701 through fasteners 705 at the gaps respectively. For a rotor with a larger size, the difficulty of manufacturing can be reduced by the split permanent magnet magnetic shoes 702, and the split permanent magnet magnetic shoes are convenient to install block by block.

Further, the rotor 701 and the rotor shaft 6 are of an integrally formed structure, so that the integration degree is higher, and the stability is better.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The surface-mounted self-starting pipeline pump driven by the permanent magnet synchronous motor comprises a pump body, wherein an impeller is arranged in the pump body, a pump cover is arranged on the pump body, a support is arranged on the pump cover, and a casing is arranged on the support; the rotor assembly comprises a rotor sleeved on the rotor shaft, a plurality of permanent magnet magnetic shoes are pasted on the outer circumference of the rotor, the permanent magnet magnetic shoes are of a split arc-shaped plate structure, and at least one circle of magnetic shoe anchor ear is arranged outside each permanent magnet magnetic shoe; the stator assembly is matched with the rotor assembly and is formed by combining at least two stator units in a fan-shaped structure, each stator unit comprises a stator core and a stator winding wound on the stator core, each stator unit is independently controlled, the stator cores are arranged in the shell, and the permanent magnet magnetic shoes are arranged opposite to the stator windings; one end of the rotor shaft, which is far away from the rotor assembly, sequentially penetrates through the support and the pump cover and extends into the pump body to be connected with the impeller.

2. The surface-mounted self-starting PMSM driven pipeline pump according to claim 1, wherein said rotor has a snap-fit groove on its outer circumference, and said permanent magnet shoes have their inner sides snap-fitted in said snap-fit groove and a glue layer is provided between them.

3. The surface-mounted self-starting PMSM-driven pipeline pump according to claim 2, wherein said snap-in groove is an arc-shaped groove; the glue layer is a coated adhesive which is an industrial adhesive, such as a high-temperature magnetic tile adhesive.

4. The surface-mounted self-starting PMSM-driven pipeline pump of claim 1, wherein said permanent magnet tiles are ferrite tiles and/or NdFeB tiles, and said permanent magnet tiles are at least a pair of symmetrically arranged tiles.

5. The surface-mounted self-starting PMSM-driven pipeline pump of claim 1, wherein said magnetic shoe hoop is circumferentially disposed at a middle position of said rotor assembly, said magnetic shoe hoop fastens a plurality of said permanent magnet magnetic shoes and is fixed with said rotor by screwing, and the position of screwing is disposed at a gap between adjacent permanent magnet magnetic shoes.

6. The surface-mounted self-starting PMSM-driven pipeline pump according to claim 1, wherein said stator core is a sector disc-shaped or sector cylindrical structure; and the stator iron core is respectively screwed on the shell and/or the bracket.

7. The surface-mounted self-starting PMSM-driven pipeline pump according to claim 1, wherein said rotor and said rotor shaft are of an integrally formed structure, or said rotor and said rotor shaft are in flat key connection; the rotor shaft is a multi-stage stepped shaft, and the upper end part of the rotor shaft is in bearing connection with the shell and the bracket respectively; the lower end of the rotor shaft is in threaded connection with the impeller or is welded and fixed with the impeller, and multiple mechanical seals are arranged between the rotor shaft and the pump cover.

8. The surface-mounted self-starting PMSM-driven pipeline pump according to claim 1, wherein said housing is threadably secured to said bracket, said bracket being of a hollowed-out structure; the pump cover is provided with an annular cavity, and a water retaining ring is arranged at the position, located in the pump cover, of the rotor shaft.