CN214742122U

CN214742122U - Surface-mounted self-starting sewage pump driven by permanent magnet synchronous motor

Info

Publication number: CN214742122U
Application number: CN202120229007.6U
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 sewage pump, which comprises a chassis, a pump body, an impeller, a pump cover, a support frame, a casing and a rotor shaft, wherein a rotor assembly is sleeved on the rotor shaft; a stator component matched with the rotor component is also arranged in the shell; one end of the rotor shaft, which is far away from the rotor assembly, sequentially penetrates through the support frame and the pump cover and extends into the pump body to be connected with the impeller; the sewage 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 and less energy consumption, and can be used in various working conditions with self-starting and compact structure.

Description

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

Technical Field

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

Background

The sewage pump belongs to one of centrifugal impurity pumps, and has various forms: such as both submersible and dry. The sewage pump is mainly used for conveying urban sewage, and along with the improvement of national environmental regulations and the enhancement of environmental awareness of people, the sewage pump for sewage treatment is increasingly required and applied. The sewage pump is usually used together with a motor, and the sewage discharge capability of the sewage pump is directly influenced by the performance of the motor.

The permanent magnet synchronous motor has the advantages of small volume, light weight, small loss, high efficiency, high power factor and the like, is mainly used for replacing motors of high-performance servo transmission systems and direct current motors which require quick response, wide speed regulation range and accurate positioning, and is widely applied to the permanent magnet synchronous motor because the efficiency of the permanent magnet synchronous motor is higher than that of other types of motors in order to save energy and reduce emission and improve the energy efficiency of the motor at present. However, when the permanent magnet synchronous motor is applied to the sewage pump, the cost of the sewage pump is increased due to high requirements on materials, manufacture and assembly of the stator assembly and the rotor assembly.

Like chinese utility model patent (CN209434990U) in 2019, a rotor core assembly for a permanent magnet synchronous sewage pump is disclosed, which comprises a rotor core main body, a permanent magnet, a rotating shaft hole and a conductive magnetic conductive ring, wherein the rotor core main body is formed by splicing a plurality of adjacent split rotor blocks which are mutually attached. The utility model discloses a rotor though convenient casting, processing is more time-consuming, and when the assembly, the requirement is higher moreover, needs to correspond more with fixed place.

Disclosure of Invention

The utility model aims at providing a table pastes formula self-starting PMSM driven sewage 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 sewage pump driven by the permanent magnet synchronous motor comprises a chassis, wherein a pump body is arranged on the chassis, an impeller is arranged in the pump body, a pump cover is arranged above the pump body, a support frame is connected above the pump cover, a casing is arranged above the support frame, a rotor shaft is 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 attached to the outer circumference of the rotor, and at least one circle of magnetic shoe hoop is arranged outside each permanent magnet magnetic shoe; the stator assembly is matched with the rotor assembly and comprises a stator core and a stator winding wound on the stator core, the stator core is of an integrally formed disc-shaped structure or a columnar structure, the stator core is arranged on the inner wall of the machine shell, and the permanent magnet magnetic shoe is arranged opposite to the stator winding; one end of the rotor shaft, which is far away from the rotor assembly, sequentially penetrates through the support frame and the pump cover and extends into the pump body to be connected with the impeller.

The sewage pump has the advantages of simple and compact structure, easy assembly and maintenance, lower cost, reduction of the arrangement of a reduction gear, a complex transmission system and a lubricating system in various working conditions requiring self-starting and compact structure, 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. 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 arc plate structure, 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, also can keep better with the clearance between stator module.

The stator core is of an integrated structure, can be directly installed on the inner wall of the shell in a threaded manner, and is convenient to assemble and disassemble; a plurality of bottle-shaped grooves are formed in the inner circumference of the stator core in a centrosymmetric mode, and the stator winding is wound on the wall between the bottle-shaped grooves.

Furthermore, the cross section of the support frame is W-shaped and comprises a lower support end face, an upper support end face and a middle support; the lower support end face is clamped with the pump cover and is in threaded connection and fixed, the upper support end face is clamped with the shell and is in threaded connection and fixed, the middle support is provided with an inner support hole structure, and the rotor shaft penetrates through the inner support hole structure and is provided with a plurality of bearings between the rotor shaft and the inner support hole structure; an oil chamber is formed between the lower part of the support frame and the pump cover, and multiple mechanical seals are arranged between the rotor shaft and the pump cover.

The support frame with the structure can play a better role of bearing up and down, and the lower support end face, the upper support end face and the middle support are respectively connected with and support one component, so that the structure is reasonable and the stability is good; the W-shaped cavity is useful in each place, and an oil chamber is not required to be arranged independently.

Furthermore, a gland is arranged above the machine shell, a motor cover is arranged above the gland, the gland is clamped and supported between the machine shell and the motor cover, and the machine shell is fixed through the motor cover in a threaded connection mode; an inner counter bore is arranged below the gland, the end part of the rotor shaft is sleeved in the inner counter bore, and a bearing is arranged between the end part of the rotor shaft and the inner counter bore.

The arrangement of the gland is convenient for connecting the rotor shaft and the junction box, the gland is fixed in a clamping mode without independent screw connection, and the motor cover can be fixed to fix the gland, so that the motor cover is more convenient.

Furthermore, a junction box is arranged above the gland, and the gland and the motor cover are both provided with wiring holes.

Furthermore, the section of the impeller is T-shaped, the end part of the rotor shaft penetrates through the upper end face of the impeller and is in expansion connection with the impeller, and the inlet at the lower end of the impeller is sleeved at the inlet of the pump body and corresponds to the inlet. Such an arrangement enables the narrow space within the pump body to be fully utilized.

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, and the arc-shaped groove can be a shallow groove, so that the processing amount of the rotor can be reduced, and the processing cost and time can be reduced; 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.

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.

Compared with the prior art, the beneficial effects of the utility model are that: 1. the sewage 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 and less energy consumption, 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 arc-shaped plate structure, so that the mounting, the dismounting and the independent adjustment are convenient, the arrangement of the magnetic shoe hoop can further improve the fastening degree and the mounting stability of the permanent magnet magnetic shoe, and the stator core is of an integrated structure and is convenient to mount and dismount; 4. the support frame with the structure can play a good role in bearing and opening, the lower support end face, the upper support end face and the middle support are respectively connected with and support a component, and the support frame is reasonable in structure and good in stability.

Drawings

Fig. 1 is an overall schematic view of a surface-mounted self-starting permanent magnet synchronous motor driven sewage pump of the present invention;

FIG. 2 is a schematic view of a cross-sectional structure of a motor of a surface-mounted self-starting PMSM driven sewage pump of the present invention;

FIG. 3 is a schematic structural view of a rotor assembly of a sewage pump driven by a surface-mounted self-starting permanent magnet synchronous motor 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 sewage pump of the present invention;

in the figure: 1. a chassis; 2. a pump body; 3. a pump cover; 4. a support frame; 401. a lower support end face; 402. an upper support end face; 403. supporting the middle part; 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. an impeller; 10. a bearing; 11. a gland; 12. a motor cover.

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. 1-2, a surface-mounted self-starting permanent magnet synchronous motor driven sewage pump comprises a chassis 1, a pump body 2 is arranged on the chassis 1, an impeller 9 is arranged in the pump body 2, a pump cover 3 is arranged above the pump body 2, a support frame 4 is connected above the pump cover 3, a casing 5 is arranged above the support frame 4, a rotor shaft 6 is 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 attached to the outer circumference of the rotor 701, and a circle of magnetic shoe anchor ear 703 is arranged outside each permanent magnet magnetic shoe 702; the machine shell 5 is also internally provided with a stator assembly 8 matched with the rotor assembly 7, the stator assembly 8 comprises a stator core 801 and a stator winding 802 wound on the stator core 801, the stator core 801 is of an integrally formed columnar structure, the stator core 801 is arranged on the inner wall of 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 frame 4 and the pump cover 3 and extends into the pump body 2 to be connected with the impeller 9.

The sewage 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 links, capable of directly acting on the rotor shaft 6 through the rotor 701 to drive the impeller 9 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 9 are directly driven to work.

By adopting a surface-mounted mode and matching with the structure of the permanent magnet magnetic shoe 702, 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 arc-shaped plate 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 702, the displacement change of the permanent magnet magnetic shoe 702 is less in long-term work, and the gap between the permanent magnet magnetic shoe and the stator assembly can be kept better.

The stator core 801 is of an integrated structure and can be directly installed on the inner wall of the shell in a threaded manner, so that the assembly and disassembly are convenient; a plurality of bottle-shaped grooves are formed on the inner circumference of the stator core 801 in a central symmetry manner, and the stator winding 802 is wound around the wall between the bottle-shaped grooves.

Further, the cross section of the support frame 4 is "W" shaped, and includes a lower support end surface 401, an upper support end surface 402 and a middle support 403; the lower support end face 401 is fastened and screwed with the retainer ring on the pump cover 3, the upper support end face 402 is fastened and screwed with the lower end face of the casing 5, the middle support 403 is provided with an inner support hole structure, and the rotor shaft 6 penetrates through the inner support hole structure and is provided with a plurality of bearings 10 between the inner support hole structure and the inner support hole structure; an oil chamber is formed between the lower part of the support frame 4 and the pump cover 3, and multiple mechanical seals (not shown in the figure) are arranged between the rotor shaft 6 and the pump cover 3.

The support frame 4 with the structure can play a better role in supporting up and down, and the lower support end surface 401, the upper support end surface 402 and the middle support 403 are respectively connected with and support one component, so that the structure is reasonable and the stability is good; the W-shaped cavity is useful in each place, and an oil chamber is not required to be arranged independently.

Further, a gland 11 is further arranged above the casing 5, a motor cover 12 is further arranged above the gland 11, the gland 11 is clamped and supported between the upper end face of the casing 5 and the motor cover 12, and the casing 5 is fixed through the motor cover 12 in a threaded connection mode; an inner counter bore is arranged below the gland 11, the end part of the rotor shaft 6 is sleeved in the inner counter bore, and a bearing 10 is arranged between the end part of the rotor shaft and the inner counter bore.

The arrangement of the gland 11 is convenient for connecting the rotor shaft 6 and the junction box, the gland 11 is not fixed in a clamping mode through independent screw connection, and the motor cover 12 can be fixed to fix the gland 11, so that the connection is more convenient.

Furthermore, a junction box is arranged above the gland 11, and wiring holes are formed in the gland 11 and the motor cover 12.

Further, the section of the impeller 9 is in a T shape, the end of the rotor shaft 6 penetrates through the upper end face of the impeller 9 and is connected with the impeller 9 in an expanding manner, an impeller bolt is further arranged at the end, and an inlet at the lower end of the impeller 9 is sleeved at the inlet of the pump body 2 and corresponds to the inlet. Such an arrangement enables the narrow space within the pump body to be fully utilized.

Further, as shown in fig. 3 and 4, an engaging 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 and the engaging groove 706, and the inner side of the permanent magnet shoe 702 is engaged in the engaging 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 arc-shaped groove can be a shallow 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 low, and the permanent magnet magnetic shoe can be used in a sewage pump with low precision requirement; the permanent magnet tiles 702 are at least a pair of symmetrically arranged permanent magnet tiles.

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, and the threaded connection position is arranged at a gap between the 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 703 avoids the displacement of magnetic shoe staple bolt.

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 sewage pump driven by the permanent magnet synchronous motor comprises a chassis, wherein a pump body is arranged on the chassis, an impeller is arranged in the pump body, and a pump cover is arranged above the pump body; the rotor assembly comprises a rotor sleeved on the rotor shaft, a plurality of permanent magnet magnetic shoes are attached to the outer circumference of the rotor, and at least one circle of magnetic shoe hoop is arranged outside each permanent magnet magnetic shoe; the stator assembly is matched with the rotor assembly and comprises a stator core and a stator winding wound on the stator core, the stator core is of an integrally formed disc-shaped structure or a columnar structure, the stator core is arranged on the inner wall of the machine shell, and the permanent magnet magnetic shoe is arranged opposite to the stator winding; one end of the rotor shaft, which is far away from the rotor assembly, sequentially penetrates through the support frame and the pump cover and extends into the pump body to be connected with the impeller.

2. The surface-mounted self-starting permanent magnet synchronous motor-driven sewage pump according to claim 1, wherein the cross section of the supporting frame is "W" shaped, and comprises a lower supporting end face, an upper supporting end face and a middle support; the lower support end face is clamped with the pump cover and is in threaded connection and fixed, the upper support end face is clamped with the shell and is in threaded connection and fixed, the middle support is provided with an inner support hole structure, and the rotor shaft penetrates through the inner support hole structure and is provided with a plurality of bearings between the rotor shaft and the inner support hole structure; an oil chamber is formed between the lower part of the support frame and the pump cover, and multiple mechanical seals are arranged between the rotor shaft and the pump cover.

3. The surface-mounted self-starting permanent magnet synchronous motor driven sewage pump according to claim 1, wherein a gland is further arranged above the machine shell, a motor cover is further arranged above the gland, the gland is clamped and supported between the machine shell and the motor cover, and the motor cover is fixed on the machine shell in a threaded connection manner; an inner counter bore is arranged below the gland, the end part of the rotor shaft is sleeved in the inner counter bore, and a bearing is arranged between the end part of the rotor shaft and the inner counter bore.

4. The surface-mounted self-starting PMSM driven sewage pump of claim 3, further having a junction box above said gland, said gland and said motor cover having wire holes.

5. The surface-mounted self-starting permanent magnet synchronous motor-driven sewage pump according to claim 1, wherein the impeller is T-shaped in cross section, the end of the rotor shaft passes through the upper end face of the impeller and is connected with the impeller in an expanding manner, and the inlet at the lower end of the impeller is sleeved at the inlet of the pump body and corresponds to the inlet.

6. The surface-mounted self-starting PMSM driven sewage pump of claim 1, wherein a snap-in groove is provided on the outer circumference of said rotor, the inner side of said permanent magnet shoe is snap-in said snap-in groove and a glue layer is provided between said snap-in groove and said permanent magnet shoe.

7. The surface-mounted self-starting PMSM-driven sewage pump of claim 6, 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.

8. The surface-mounted self-starting PMSM-driven sewage pump of claim 1, wherein said permanent magnet shoes are ferrite shoes and/or NdFeB shoes, said permanent magnet shoes being at least a pair of symmetrically disposed shoes.

9. The surface-mounted self-starting permanent magnet synchronous motor driven sewage pump according to claim 1, wherein the magnetic shoe hoop is circumferentially arranged at the middle position of the rotor assembly, the magnetic shoe hoop fastens a plurality of the permanent magnet magnetic shoes and is fixedly connected with the rotor in a threaded manner, and the threaded position is arranged at a gap between adjacent permanent magnet magnetic shoes.