CN215566683U - Squirrel-cage embedded disc type composite self-starting permanent magnet synchronous motor driven pipeline pump - Google Patents

Abstract

The utility model discloses a squirrel-cage embedded disc type composite self-starting pipeline pump driven by a permanent magnet synchronous motor, 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 column type rotor assembly and a disc type rotor assembly are respectively sleeved on the rotor shaft, a column type stator assembly arranged in the casing and corresponding to the column type rotor assembly, and a disc type stator assembly arranged in the casing and corresponding to the disc type rotor assembly; one end of the rotor shaft, which is far away from the column type 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 easy to assemble and maintain, can be used in various working conditions needing self-starting and compact in structure, the plurality of rotors directly act on the rotor shaft to drive the impeller to rotate together, the rotary thrust is large, the torque is large, the motor efficiency is high, and the rotating speed is easy to control.

Description

Squirrel-cage embedded disc type composite self-starting permanent magnet synchronous motor driven pipeline pump

Technical Field

The utility model relates to the technical field of pipeline pumps, in particular to a squirrel-cage embedded disc type composite self-starting pipeline pump driven by a permanent magnet synchronous motor.

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 adopt permanent magnet motor to drive, chinese of publication No. CN204827949U specially does 2015 12/2 disclose a pipe pump, through adopting the structural form of built-in motor, set up the cooling water flow channel between pump body and motor casing, make the water flow while flowing, take away the heat that the motor inside distributes out, thus maintain the normal operating temperature of the motor, the sealant can seal the casing completely, make the motor body not 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. In addition, the existing pipeline pump needs higher power output in order to meet the large-scale and large-flow pipeline conveying requirement, and the requirement on the motor is higher.

Disclosure of Invention

The utility model aims to provide a squirrel-cage embedded disc type composite self-starting pipeline pump driven by a permanent magnet synchronous motor, aiming at the problems in the prior art.

In order to achieve the purpose, the utility model adopts the technical scheme that:

the squirrel-cage embedded disc type composite 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, a column type rotor assembly and a disc type rotor assembly are respectively sleeved on the rotor shaft, and a column type stator assembly and a disc type stator assembly are arranged in the casing and correspond to the column type rotor assembly; the column type rotor assembly comprises a column type rotor sleeved on the rotor shaft, a plurality of first permanent magnet magnetic shoes are embedded in the column type rotor in the axial direction, a squirrel cage structure is installed on the periphery of the column type rotor, and a gap is kept between the squirrel cage structure and the inner circumference of the column type rotor assembly; the disc rotor assembly comprises a disc rotor sleeved on the rotor shaft, a second permanent magnet magnetic shoe is arranged on the end face of the disc rotor, and the second permanent magnet magnetic shoe is arranged corresponding to the end face of the disc stator assembly and keeps a gap; one end of the rotor shaft, which is far away from the column type 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 easy to assemble and maintain, can be used in various working conditions needing self-starting and compact in structure, reduces the arrangement of a reduction gear, a complex transmission system and a lubricating system, has no intermediate conversion link, and a plurality of rotors directly act on a rotor shaft to drive an impeller to rotate together. When the permanent magnet synchronous motor is electrified, the first permanent magnet magnetic shoe and the second permanent magnet magnetic shoe respectively provide a radial rotating magnetic field for the corresponding stator assembly, so that the stator assembly respectively provides axial rotating torque for the corresponding column rotor and the corresponding disc rotor, the rotor shaft and the impeller are directly driven to work under the common acting force, and the requirement of a large-scale high-output pipeline pump can be met.

Adopt the rotor subassembly of two kind at least structure types, can utilization by great degree limited space in the casing under the condition that does not increase axial dimensions, also can arrange a plurality of motors, and the stack of a plurality of motors can provide bigger rotary thrust, is favorable to the high-efficient work of tubing pump. The motor with the column structure is used as main output, the motor with the disc structure is used as auxiliary output, and the two are complementary, so that the high output is ensured, and the rotation stability of the rotor shaft can be ensured.

The cylindrical rotor assembly with the squirrel cage embedded type has the advantages of simple structure, firmness, durability, reliable operation, convenient maintenance and the like, and the outer circumference of the cylindrical rotor is regular and easy to process; the first permanent magnet magnetic shoe is directly embedded into the column type rotor, so that the circumferential space occupied by the permanent magnet magnetic shoe can be reduced, and the radial size of the motor is reduced.

Further, the disc rotor assembly is one, or a pair of disc rotor assemblies is arranged at two axial ends of the column rotor assembly.

Further, the disc stator assembly comprises a disc stator core and a stator winding wound on the disc stator core; the outer periphery of the disc type stator core is fixed on the inner periphery of the shell in a threaded mode, an axial through hole is formed in the middle of the disc type stator core and sleeved on the rotor shaft, and the end face of the disc type stator core corresponds to the second permanent magnet magnetic shoe.

Further, the column stator assembly comprises a column stator core mounted on the inner periphery of the casing, and a stator winding wound on the column stator core; the axial dimension of the column type stator component is not less than that of the column type rotor component.

The disc stator assembly and the column stator assembly are independently arranged in the shell, can be independently arranged and replaced, and is convenient for later maintenance, and the disc stator assembly can also be arranged on the inner end face of the shell through the stator support, so that the disc stator core can be used for the second permanent magnet magnetic shoe.

Further, first permanent magnet magnetic shoe with second permanent magnet magnetic shoe is ferrite magnetic shoe or neodymium iron boron magnetic shoe, or ferrite magnetic shoe and neodymium iron boron magnetic shoe used alternately.

Furthermore, the first permanent magnet magnetic shoe is strip-shaped, and the adjacent first permanent magnet magnetic shoes are arranged in a V shape; the first permanent magnet magnetic shoes axially penetrate through the column type rotor and are close to the outer circumference of the column type rotor.

The column type rotor with the structure is provided with an axial through groove, and then the first permanent magnet magnetic shoe is clamped into the through groove, so that the end part of the first permanent magnet magnetic shoe is kept flush; the first permanent magnet magnetic shoes are arranged in a V shape, and magnetic poles are sequentially and alternately arranged, so that the formation of a magnetic field and the control of magnetic force are facilitated.

Furthermore, the two ends of the column type rotor are respectively provided with a detachable pressing ring, and the pressing rings abut against the end parts of the first permanent magnet magnetic shoes and are in screwed connection with the end surfaces of the column type rotor. The arrangement of the compression ring can further improve the installation firmness of the first permanent magnet magnetic shoe, avoid the axial displacement of the first permanent magnet magnetic shoe and ensure the stability of the first permanent magnet magnetic shoe; and the clamping ring is fixed for dismantling the spiro union, and more space also can not be occupied for easy to assemble and later stage dismantlement, does not surpass the both ends position of squirrel cage structure.

Further, the column rotor and the disc rotor are connected with the rotor shaft through flat keys, the rotor shaft is a multi-stage stepped shaft, and bearing assemblies are respectively arranged between the upper end part of the rotor shaft and the casing and between the rotor shaft and the bracket; 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 inner side of 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 fixed on the pump cover in a threaded manner; the pump cover is provided with an inner cavity, and the rotor shaft is located at the inner cavity and is provided with a water retaining ring.

Compared with the prior art, the utility model has the beneficial effects that: 1. the pipeline pump is easy to assemble and maintain, can be used in various working conditions requiring self-starting and compact structure, reduces the arrangement of a reduction gear, a complex transmission system and a lubricating system, has no intermediate conversion link, and has the advantages that a plurality of rotors directly act on a rotor shaft to jointly drive an impeller to rotate, the rotary thrust is large, the torque is large, the motor efficiency is high, and the rotating speed is easy to control; 2. the first permanent magnet magnetic shoe and the second permanent magnet magnetic shoe respectively provide a radially rotating magnetic field for the corresponding stator assembly, so that the stator assembly respectively provides axial rotating torque for the corresponding column rotor and the corresponding disc rotor, the rotor shaft and the impeller are directly driven to work under the common acting force, and the requirement of a large-scale high-output pipeline pump can be met; 3. the rotor assemblies with two types of structures can utilize the limited space in the shell to a greater extent, and can be provided with a plurality of motors under the condition of not increasing the axial size, and the superposition of the plurality of motors can provide greater rotary thrust, thereby being beneficial to the efficient work of the pipeline pump; 4. the first permanent magnet magnetic shoes are arranged in a V shape, and magnetic poles are sequentially and alternately arranged, so that the formation of a magnetic field and the control of magnetic force are facilitated; the setting of clamping ring can further improve the installation fastness of first permanent magnet magnetic shoe avoids the axial displacement of first permanent magnet magnetic shoe ensures its stability.

Drawings

FIG. 1 is a schematic structural diagram of a squirrel-cage embedded disc type composite self-starting permanent magnet synchronous motor driven pipeline pump according to the present invention;

FIG. 2 is a perspective view of a cylindrical rotor assembly according to the present invention;

FIG. 3 is a schematic end view of a cylindrical rotor assembly of the present invention;

FIG. 4 is a schematic structural diagram of a squirrel-cage embedded disc type composite self-starting permanent magnet synchronous motor driven pipeline pump according to another embodiment 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 pole rotor assembly; 701. a columnar rotor; 702. a first permanent magnet shoe; 703. a squirrel cage structure; 704. pressing a ring; 8. a disc rotor assembly; 801. a disc rotor; 802. a second permanent magnet shoe; 9. a columnar stator assembly; 10. a disc stator assembly; 11. a bearing assembly; 12. mechanical sealing; 13. an inner cavity; 14. a water retaining ring.

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within 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 those shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, 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 and 2, a squirrel-cage embedded disc type composite self-starting permanent magnet synchronous motor driven pipeline pump includes a pump body 1, 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, a column type rotor assembly 7 and a disc type rotor assembly 8 are respectively sleeved on the rotor shaft 6, and a column type stator assembly 9 arranged in the casing 5 and corresponding to the column type rotor assembly 7 and a disc type stator assembly 10 arranged corresponding to the disc type rotor assembly 8 are arranged; the column-type rotor assembly 7 comprises a column-type rotor 701 sleeved on the rotor shaft 6, a plurality of first permanent magnet magnetic shoes 702 are embedded in the column-type rotor 701 in the axial direction, a squirrel cage structure 703 is installed on the periphery of the column-type rotor 701, and a gap is kept between the squirrel cage structure 703 and the inner circumference of the column-type rotor assembly 7; the disc rotor assembly 8 comprises a disc rotor 801 sleeved on the rotor shaft 6, a second permanent magnet magnetic shoe 802 is arranged on the lower end face of the disc rotor 801, and the second permanent magnet magnetic shoe 802 corresponds to the end face of the disc stator assembly 10 and keeps a gap; the disc rotor assembly 8 is located above the column rotor assembly 7 and close to the upper end of the casing 5, and the lower end of the rotor shaft 6 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 easy to assemble and maintain, can be used in various working conditions needing self-starting and compact in structure, reduces the arrangement of a reduction gear, a complex transmission system and a lubricating system, has no intermediate conversion link, and a plurality of rotors directly act on a rotor shaft to drive an impeller to rotate together. When the permanent magnet synchronous motor is powered on, the first permanent magnet magnetic shoe 702 and the second permanent magnet magnetic shoe 802 respectively provide a radially rotating magnetic field for the corresponding stator assembly, so that the stator assembly respectively provides axial rotation torque for the corresponding column rotor 701 and the corresponding disc rotor 801, the rotor shaft 6 and the impeller 2 are directly driven to work under the common acting force, and the requirement of a large-scale high-output pipeline pump can be met.

Rotor assemblies of two types of structures are adopted, the limited space in the casing 5 can be utilized to a greater extent, the space vacated at two ends of the column type rotor assembly 7 can be just utilized by setting the disc type rotor assembly 8, a plurality of motors can be arranged in the casing 5, the superposition of the plurality of motors can provide larger rotary thrust, and the efficient work of the pipeline pump is facilitated. The motor with the column structure is used as main output, the motor with the disc structure is used as auxiliary output, and the two are complementary, so that the high output is ensured, and the rotation stability of the rotor shaft can be ensured.

The cylindrical rotor assembly 7 with the squirrel cage embedded type has the advantages of simple structure, firmness, durability, reliable operation, convenient maintenance and the like, and the outer circumference of the cylindrical rotor 701 is regular and easy to process; the first permanent magnet magnetic shoe 702 is directly embedded into the column rotor 701, so that the circumferential space occupied by the permanent magnet magnetic shoe can be reduced, and the radial size of the motor is reduced.

Further, the disc stator assembly 10 includes a disc stator core, and a stator winding wound on the disc stator core; the outer periphery of the disc type stator core is fixed on the inner periphery of the casing 5 in a threaded mode, an axial through hole is formed in the middle of the disc type stator core and sleeved on the rotor shaft 6, and the end face of the disc type stator core corresponds to the second permanent magnet magnetic shoe 802. The size of the through hole is slightly larger than the outer diameter of the rotor shaft 6, and a bearing can be arranged at the through hole.

Further, the column stator assembly comprises a column stator core mounted on the inner periphery of the casing, and a stator winding wound on the column stator core; the axial dimension of the column type stator component is not less than that of the column type rotor component.

The disc stator assembly 10 and the column stator assembly 9 are independently installed inside the casing 5, can be independently installed and replaced, and are convenient for later maintenance.

Further, the first permanent magnet magnetic shoe 702 and the second permanent magnet magnetic shoe 802 are ferrite magnetic shoes, and the ferrite magnetic shoes can meet the working condition requirement of the pipeline pump and are low in cost.

Further, the first permanent magnet magnetic shoe 702 is strip-shaped, and the adjacent first permanent magnet magnetic shoes 702 are arranged in a V shape; the first permanent magnet tiles 702 axially penetrate through the column rotor 701 and are arranged close to the outer circumference of the column rotor 701.

The column rotor 701 with the structure is provided with an axial through groove, and then the first permanent magnet magnetic shoe 702 is clamped into the through groove, so that the end parts of the first permanent magnet magnetic shoe are kept flush; the first permanent magnet tiles 702 are arranged in a V shape, and magnetic poles are alternately arranged in sequence, so that the formation of a magnetic field and the control of magnetic force are facilitated.

Further, the column rotor 701 and the disc rotor 801 are both connected with the rotor shaft 6 through a flat key, the rotor shaft 6 is a multistage stepped shaft, and bearing assemblies 11 are respectively arranged between the upper end of the rotor shaft 6 and the casing 5 and between the rotor shaft 6 and the bracket 4; the lower end part of the rotor shaft 6 is fixed with the impeller 2 in a threaded manner, and multiple mechanical seals 12 are arranged between the rotor shaft 6 and the inner side of the pump cover 3. 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 12 can improve the effect of the rotary seal and avoid liquid leakage.

Further, the casing 5 is fixed on the support 4 in a threaded manner, and the support 4 is fixed on the pump cover 3 in a threaded manner; the pump cover 3 is provided with an inner cavity 13, and the rotor shaft 6 is positioned at the inner cavity 13 and is provided with a water retaining ring 14.

Example two:

the difference between this embodiment and the first embodiment is the squirrel cage structure.

Specifically, as shown in fig. 3, two ends of the column rotor 701 are respectively provided with a detachable pressing ring 704, and the pressing ring 704 abuts against the end of the first permanent magnet shoe 702 and is screwed on the end face of the column rotor 701. The arrangement of the pressing ring 704 can further improve the installation firmness of the first permanent magnet magnetic shoe 702, avoid the axial displacement of the first permanent magnet magnetic shoe 702 and ensure the stability of the first permanent magnet magnetic shoe 702; and clamping ring 704 is fixed for dismantling the spiro union, and easy to assemble and later stage are dismantled, also can not occupy more space, and the point of spiro union staggers first permanent magnet magnetic shoe 702 is equidistant evenly distributed, clamping ring 704 does not surpass squirrel cage structure 703's both ends position.

Example three:

the present embodiment differs from the first embodiment in the number of disc rotors provided.

As shown in fig. 4, two disc rotor assemblies 8 are respectively disposed at two axial ends of the cylindrical rotor assembly 7, which is equivalent to integrating three motors in the casing 5, and can provide a greater rotational thrust for the rotor shaft 6 and the impeller 2.

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 utility model, the scope of which is defined in the appended claims and their equivalents.

Claims (9)

1. The squirrel-cage embedded disc type composite 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 column type rotor assembly comprises a column type rotor sleeved on the rotor shaft, a plurality of first permanent magnet magnetic shoes are embedded in the column type rotor in the axial direction, a squirrel cage structure is installed on the periphery of the column type rotor, and a gap is kept between the squirrel cage structure and the inner circumference of the column type rotor assembly; the disc rotor assembly comprises a disc rotor sleeved on the rotor shaft, a second permanent magnet magnetic shoe is arranged on the end face of the disc rotor, and the second permanent magnet magnetic shoe is arranged corresponding to the end face of the disc stator assembly and keeps a gap; one end of the rotor shaft, which is far away from the column type 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 squirrel-cage embedded disc type composite self-starting permanent magnet synchronous motor driven pipeline pump according to claim 1, wherein the disc type rotor assembly is one or a pair of disc type rotor assemblies arranged at two axial ends of the column type rotor assembly.

3. The squirrel-cage embedded disc type composite self-starting permanent magnet synchronous motor driven pipeline pump according to claim 1, characterized in that the disc type stator assembly comprises a disc type stator core and a stator winding wound on the disc type stator core; the outer periphery of the disc type stator core is fixed on the inner periphery of the shell in a threaded mode, an axial through hole is formed in the middle of the disc type stator core and sleeved on the rotor shaft, and the end face of the disc type stator core corresponds to the second permanent magnet magnetic shoe.

4. The squirrel-cage embedded disc type composite self-starting permanent magnet synchronous motor driven pipeline pump according to claim 1, characterized in that the column stator assembly comprises a column stator core mounted on the inner circumference of the casing, and a stator winding wound on the column stator core; the axial dimension of the column type stator component is not less than that of the column type rotor component.

5. The squirrel-cage embedded disc type composite self-starting permanent magnet synchronous motor driven pipeline pump according to claim 1, wherein the first permanent magnet magnetic shoe and the second permanent magnet magnetic shoe are both ferrite magnetic shoes or neodymium iron boron magnetic shoes.

6. The squirrel-cage embedded disc type composite self-starting permanent magnet synchronous motor driven pipeline pump according to claim 1, wherein the first permanent magnet magnetic shoes are strip-shaped, and the adjacent first permanent magnet magnetic shoes are arranged in a V shape; the first permanent magnet magnetic shoes axially penetrate through the column type rotor and are close to the outer circumference of the column type rotor.

7. The squirrel-cage embedded disc type composite self-starting permanent magnet synchronous motor driven pipeline pump according to claim 1 or 6, characterized in that detachable press rings are respectively arranged at two ends of the column type rotor, and the press rings abut against the end parts of the first permanent magnet magnetic shoes and are screwed on the end surfaces of the column type rotor.

8. The squirrel-cage embedded disc type composite self-starting permanent magnet synchronous motor driven pipeline pump according to claim 1, wherein the column type rotor and the disc type rotor are connected with the rotor shaft through flat keys, the rotor shaft is a multi-stage stepped shaft, and bearing assemblies are respectively arranged between the upper end part of the rotor shaft and the casing and between the rotor shaft and the bracket; 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 inner side of the pump cover.

9. The squirrel-cage embedded disc type composite self-starting permanent magnet synchronous motor driven pipeline pump according to claim 1, wherein the casing is screwed and fixed on the bracket, and the bracket is screwed and fixed on the pump cover; the pump cover is provided with an inner cavity, and the rotor shaft is located at the inner cavity and is provided with a water retaining ring.

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