CN117386630A

CN117386630A - Centrifugal shielding pump

Info

Publication number: CN117386630A
Application number: CN202311531558.8A
Authority: CN
Inventors: 刘洪福; 肖虎; 瞿英杰
Original assignee: Hunan M&w Energy Saving Technology&science Co ltd
Current assignee: Hunan M&w Energy Saving Technology&science Co ltd
Priority date: 2023-11-16
Filing date: 2023-11-16
Publication date: 2024-01-12

Abstract

The embodiment of the application provides a centrifugal shielding pump, which comprises a pump shell, an impeller and an axial flux motor; the pump shell is provided with a water inlet and a water outlet; the impeller and the axial flux motor are arranged in the pump shell; the axial flux motor comprises a stator and a rotor which are arranged along the axial direction of the axial flux motor, and the rotor is connected with the impeller so as to drive the impeller to rotate under the action of the stator. The centrifugal shielding pump of this application embodiment overall structure is compact, and unit efficiency is higher relatively.

Description

Centrifugal shielding pump

Technical Field

The application relates to the technical field of pumping equipment, in particular to a centrifugal shielding pump.

Background

In the related art, a motor and a pump head of the centrifugal shielding pump are generally connected through a coupling, the centrifugal shielding pump is complex in structure, large in size and relatively low in unit efficiency.

Disclosure of Invention

In view of this, it is desirable to provide a centrifugal canned motor pump that is compact in overall structure and relatively efficient in assembly.

To achieve the above object, an embodiment of the present application provides a centrifugal canned motor pump, including:

the pump shell is provided with a water inlet and a water outlet;

an impeller disposed within the pump housing;

the axial flux motor is arranged in the pump shell and comprises a stator and a rotor which are arranged along the axial direction of the axial flux motor, and the rotor is connected with the impeller so as to drive the impeller to rotate under the action of the stator.

In one embodiment, the number of the impellers and the number of the rotors are two, the two rotors are respectively arranged on two opposite sides of the stator along the axial direction, and the rotors are connected with the impellers in a one-to-one correspondence manner.

In one embodiment, the impeller has an end face facing the axial flux motor, and at least a portion of the outer surface of the rotor facing the impeller is in contact with the end face.

In one embodiment, the rotor is annular, a protruding portion is arranged at one end, close to the axial flux motor, of the impeller, and the rotor is sleeved on the protruding portion.

In one embodiment, the rotor is thermally fixed to the boss.

In one embodiment, the axial-flux motor further comprises a shield that wraps around an outer surface of the stator.

In one embodiment, the axial flux motor includes a housing, the stator is disposed within the housing, and the housing is in sealing engagement with the pump housing.

In one embodiment, the axial flux motor includes a housing, the stator is disposed within the housing, the rotor is located outside the housing, and a side of the housing facing the rotor is open.

In one embodiment, the centrifugal shield pump includes a terminal post having a wiring channel disposed on the pump housing, the wiring channel in communication with the interior of the pump housing.

In one embodiment, the centrifugal canned motor pump further comprises a rotatable spindle, the impeller has a first shaft hole, the axial flux motor comprises a housing having a second shaft hole, the stator is disposed in the housing, and the spindle is disposed in the first shaft hole and the second shaft hole in a penetrating manner.

In one embodiment, the centrifugal shield pump comprises a first shaft sleeve sleeved on the main shaft, and the first shaft sleeve penetrates through the second shaft hole and is abutted with the impeller.

In one embodiment, the opposite ends of the casing along the axial direction are respectively provided with an open mouth, and the centrifugal shielding pump further comprises two sealing parts, wherein the sealing parts are in one-to-one correspondence to seal the open mouth.

In one embodiment, each sealing component comprises a sealing body with a mounting channel and a guide bearing arranged in the mounting channel, the sealing body is arranged in the pump shell and is in sealing fit with the pump shell, and the main shaft is arranged in the guide bearing in a penetrating mode.

In one embodiment, each of the sealing members further includes the thrust bearing disposed within the mounting channel, the main shaft being located on a side of the thrust bearing adjacent the axial-flux motor.

In one embodiment, the centrifugal shield pump comprises a second sleeve sleeved on the main shaft, and the second sleeve is arranged in the guide bearing in a penetrating manner and is respectively abutted against the thrust bearing and the impeller.

In one embodiment, each sealing member further includes an opening and closing valve and an end cap having a through hole, the end cap being provided at the corresponding opening, the opening and closing valve being provided at the through hole.

The embodiment of the application provides a centrifugal shield pump, centrifugal shield pump adopts axial magnetic field motor, axial magnetic field motor's volume is less, occupation space is less, simultaneously, axial magnetic field motor sets up in the pump case, axial magnetic field motor combines to form overall structure with pump case and impeller promptly, can make centrifugal shield pump's overall structure compact, in addition, the rotor is connected with the impeller, directly drives the impeller through the rotor and rotates, and need not drive the impeller through the shaft coupling and rotate, not only can simplify centrifugal shield pump's structure, can also effectively improve unit efficiency. The centrifugal shielding pump of this application embodiment has compact whole structure, and unit efficiency is relatively higher, can save user's civil engineering cost and installation cost, reduces the operation cost, and this centrifugal shielding pump can be applicable to a plurality of fields such as urban water supply, rural water supply, gardens sprinkling irrigation, industrial water, civilian house to provide more convenient, efficient service for the user.

Drawings

Fig. 1 is a schematic structural diagram of a centrifugal canned motor pump according to an embodiment of the present application;

FIG. 2 is a schematic view of the centrifugal shield pump of FIG. 1 from another perspective;

FIG. 3 is a cross-sectional view A-A of the centrifugal barrier pump shown in FIG. 2;

fig. 4 is a partial enlarged view at B in fig. 3.

Description of the reference numerals

10. A pump housing; 10a, a water inlet; 10b, a water outlet; 11. a pump body; 12. a pump cover; 20. an impeller; 20a, end faces; 20b, a boss; 30. an axial flux electric machine; 31. a stator; 32. a rotor; 33. a housing; 33a, a second shaft hole; 40. binding posts; 40a, wiring channels; 50. a main shaft; 60. a first sleeve; 70. a second sleeve; 80. a sealing member; 81. a sealing body; 81a, mounting channels; 82. a guide bearing; 83. a thrust bearing; 84. a switch valve; 85. an end cap; 90. and (3) a sealing ring.

Detailed Description

In the description of the present application, the "axial" orientation or positional relationship is based on the orientation or positional relationship shown in fig. 3, and it should be understood that these orientation terms are merely for convenience of description and to simplify the description, and are not indicative or implying that the apparatus or element in question must have a particular orientation, be configured and operated in a particular orientation, and therefore should not be construed as limiting the present application.

An embodiment of the present application provides a centrifugal canned motor pump, referring to fig. 1-4, comprising a pump casing 10, an impeller 20, and an axial flux motor 30.

The pump housing 10 has a water inlet 10a and a water outlet 10b. The water inlet 10a is an inlet through which water flows into the pump housing 10, and the water outlet 10b is an outlet through which water flows out of the pump housing 10.

Referring to fig. 1 to 3, a pump housing 10 may be provided with a pump body 11 and a pump cover 12, the pump cover 12 being detachably connected to the pump body 11.

The impeller 20 and the axial flux motor 30 are both disposed within the pump casing 10. The axial flux motor 30 includes a stator 31 and a rotor 32 aligned in the axial direction of the axial flux motor 30, and the rotor 32 is connected to the impeller 20 to rotate the impeller 20 under the action of the stator 31.

Axial magnetic field motors are also called disc motors, pancake motors, ring motors and the like, the magnetic flux direction of the axial magnetic field motors is axial, and the air gap is planar. The axial magnetic field motor has small line head loss, large effective magnetic flux area and high efficiency of over 96 percent.

The centrifugal canned motor pump in fig. 3 is provided with two impellers 20 and two rotors 32, the two rotors 32 are respectively arranged at two opposite sides of the stator 31 along the axial direction, and the rotors 32 are connected with the impellers 20 in a one-to-one correspondence. That is, the axial flux motor 30 is provided with impellers 20 on two opposite sides in the axial direction, and the rotor 32 located on the same side as the stator 31 is connected to the impellers 20, so that the two impellers 20 can be driven by the corresponding rotors 32 to rotate synchronously.

In other embodiments, the centrifugal barrier pump may be provided with only one impeller 20 and one rotor 32.

Referring to fig. 3 and 4, the centrifugal canned motor may be provided with a sealing ring 90, where the sealing ring 90 is sleeved on an end of the impeller 20 facing away from the axial flux motor 30 and is fixedly connected to the pump casing 10.

The seal ring 90 may be fixed to the pump casing 10 by a fastener such as a dowel pin, and the impeller 20 may be rotated relative to the seal ring 90. The seal ring 90 serves both to seal and to prevent the impeller 20 from contacting the pump casing 10.

In the related art, a motor of a centrifugal canned motor pump is generally a Y-type motor (cage rotor asynchronous motor), and the Y-type motor is arranged outside a pump head and is connected with an impeller in the pump head through a coupling. The centrifugal shielding pump has the advantages of complex structure, large volume and relatively low unit efficiency.

The centrifugal shielding pump of this application embodiment adopts the axial magnetic field motor, and axial magnetic field motor's volume is less, and occupation space is less, and simultaneously, axial magnetic field motor sets up in pump case 10, and axial magnetic field motor combines to form overall structure with pump case 10 and impeller 20 promptly, can make centrifugal shielding pump's overall structure compact, in addition, rotor 32 is connected with impeller 20, directly drives impeller 20 through rotor 32 and rotates, and need not drive impeller 20 through the shaft coupling and rotate, not only can simplify centrifugal shielding pump's structure, can also effectively improve unit efficiency. The centrifugal shielding pump of this application embodiment has compact whole structure, and unit efficiency is relatively higher, can save user's civil engineering cost and installation cost, reduces the operation cost, and this centrifugal shielding pump can be applicable to a plurality of fields such as urban water supply, rural water supply, gardens sprinkling irrigation, industrial water, civilian house to provide more convenient, efficient service for the user.

In addition, the axial magnetic field motor is arranged in the pump shell 10, and can be cooled and radiated by utilizing liquid such as water in the pump shell 10, so that the axial magnetic field motor is more durable and has longer service life.

In one embodiment, referring to fig. 4, the impeller 20 has an end face 20a facing the axial-flux motor 30, and at least a portion of the outer surface of the rotor 32 facing the impeller 20 may be in contact with the end face 20 a.

The rotor 32 may be fixedly connected to the end face 20a, i.e., the rotor 32 is not separable from the end face 20a, or the rotor 32 may not be fixedly connected to the end face 20a, i.e., the rotor 32 may be separable from the end face 20 a.

The entire outer surface of the rotor 32 facing the impeller 20 shown in fig. 4 is in contact with the end surface 20a, which corresponds to the projection of the outer surface on a projection plane perpendicular to the rotation axis of the rotor 32 being located within the projection range of the end surface 20 a.

In other embodiments, a portion of the outer surface of the rotor 32 facing the impeller 20 may be in contact with the end surface 20 a.

In particular, in general, the rotor 32 of the axial-flux motor 30 has a relatively large external dimension and is easily deformed, and although increasing the thickness dimension of the rotor 32 can well overcome the problem of deformation, increasing the thickness of the rotor 32 requires increasing the material of the rotor 32, thereby resulting in an increase in cost and a decrease in performance of the rotor 32.

And at least part of the outer surface of the rotor 32 facing the impeller 20 is in contact with the end surface 20a of the impeller 20, the rotor 32 can be effectively supported by the impeller 20, so that the rotor 32 can be well prevented from being deformed without increasing the thickness dimension of the rotor 32, and the cost is not increased, and the performance of the rotor 32 is not reduced.

In addition, the entire outer surface of the rotor 32 facing the impeller 20 is in contact with the end surface 20a, which can give the impeller 20a better supporting effect, and the rotor 32 is less likely to deform, than the portion of the outer surface of the rotor 32 facing the impeller 20 is in contact with the end surface 20 a.

In other embodiments, rotor 32 may not contact end face 20 a.

In an embodiment, referring to fig. 3 and 4, the rotor 32 is annular, and one end of the impeller 20 near the axial flux motor 30 has a protrusion 20b, and the rotor 32 may be sleeved on the protrusion 20b no matter whether the rotor 32 is in contact with the end surface 20a or not.

The boss 20b may at least provide a positioning function for the rotor 32.

Further, the rotor 32 may be interference fit with the boss 20b, that is, the boss 20b may also function to fix the rotor 32.

For example, the rotor 32 may be thermally fixed with the boss 20 b.

Hot fitting refers to the process of heating and expanding a container member and then loading the contained member into a fitting position during assembly of two parts in interference fit.

That is, during the assembly of the rotor 32, the rotor 32 may be heated to expand and then the rotor 32 may be fitted over the boss 20 b.

The rotor 32 is thermally fixed to the boss 20b, so that the rotor 32 can be securely fixed to the boss 20b, and the rotor 32 is prevented from falling off the impeller 20.

In one embodiment, axial-flux motor 30 may be provided with a shield (not shown) that wraps around the outer surface of stator 31.

The shield may be a stainless steel sheet or the like and is mainly used for protecting the stator 31 from the penetration of liquid such as water in the pump casing 10 into the stator 31.

In one embodiment, referring to fig. 3, axial-flux motor 30 includes a housing 33, and a stator 31 is disposed within housing 33. Referring to fig. 3, the casing 33 may be in sealing engagement with the pump casing 10 to fix the casing 33 and prevent fluid such as water in the pump casing 10 from penetrating between the casing 33 and the pump casing 10.

Referring to fig. 3 and 4, the rotor 32 may be located outside the casing 33, and a side of the casing 33 facing the rotor 32 is opened, i.e., a side of the casing 33 facing the rotor 32 has no wall.

The rotor 32 is located outside the casing 33, and the casing 33 is open towards one side of rotor 32, can make axial flux motor 30's structure simpler, simultaneously, because casing 33 does not have the wall body towards one side of rotor 32, therefore casing 33 occupies less space, and then can make centrifugal shield pump's overall structure compacter.

In other embodiments, the rotor 32 may be located inside the casing 33, for example, a wall body having a mounting hole may be provided on a side of the casing 33 facing the rotor 32, and a part of the structure of the rotor 32 may extend from the mounting hole to the outside of the casing 33 to be connected to the impeller 20, or a part of the structure of the impeller 20 may extend from the mounting hole to the inside of the casing 33 to be connected to the rotor 32.

In one embodiment, referring to fig. 1-3, a centrifugal shield pump may be provided with a post 40 having a wiring channel 40a, the post 40 being provided on the pump housing 10, the wiring channel 40a communicating with the interior of the pump housing 10.

The wiring channel 40a may be used to pass through a wiring terminal of the axial-flux motor 30 to facilitate wiring of the axial-flux motor 30.

In one embodiment, referring to fig. 3, the centrifugal canned motor pump may further be provided with a rotatable main shaft 50, the impeller 20 has a first shaft hole (not shown), the axial flux motor 30 includes a housing 33 having a second shaft hole 33a, the stator 31 is disposed in the housing 33, and the main shaft 50 is disposed through the first shaft hole and the second shaft hole 33 a. The main shaft 50 may rotate with the impeller 20, but the casing 33 does not rotate with the main shaft 50.

The main shaft 50 may function to support the impeller 20 to improve the reliability of rotation of the impeller 20.

Referring to fig. 3, the centrifugal shield pump may be provided with a first sleeve 60, wherein the first sleeve 60 is sleeved on the main shaft 50 and penetrates through the second shaft hole 33 a. The first sleeve 60 abuts against the impeller 20 to limit the impeller 20, and prevent the impeller 20 from being offset in a direction approaching the stator 31, so that an air gap between the rotor 32 and the stator 31 is too small.

In an embodiment, referring to fig. 3, opposite ends of the casing 33 along the axial direction of the axial flux motor 30 may be provided with open openings (not shown), and the centrifugal shielding pump may be further provided with two sealing members 80, where the sealing members 80 are in one-to-one correspondence to seal the openings.

The housing 33 is open at opposite ends in the axial direction of the axial flux motor 30, and the components in the housing 33 can be easily removed.

Referring to fig. 3, each sealing member 80 may include a sealing body 81 having a mounting passage 81a and a guide bearing 82 disposed in the mounting passage 81a, the sealing body 81 being disposed in the pump housing 10 and being in sealing engagement with the pump housing 10, and the main shaft 50 being inserted into the guide bearing 82.

For example, referring to fig. 3, the sealing body 81 may be configured to be separable from the pump casing 10, and the sealing body 81 and the pump casing 10 may be sealed by a sealing ring.

In other embodiments, seal 81 may be formed as a unitary, non-separable structure with pump body 11, seal 81 being in sealing engagement with pump cover 12, or seal 81 may be formed as a unitary, non-separable structure with pump cover 12, seal 81 being in sealing engagement with pump body 11.

The guide bearing 82 is used to bear radial force of the main shaft 50, the guide bearing 82 is disposed in the mounting channel 81a of the sealing body 81, so that the guide bearing 82 can be conveniently fixed, and fluid such as water in the pump casing 10 can also enter the mounting channel 81a to lubricate the guide bearing 82.

Referring to fig. 3, each sealing member 80 may further include a thrust bearing 83 disposed in the mounting channel 81a, and the main shaft 50 is located on a side of the thrust bearing 83 adjacent to the axial flux motor 30.

The centrifugal barrier pump of fig. 3 is provided with a second sleeve 70, the second sleeve 70 being fitted over the main shaft 50. The second sleeve 70 is inserted into the guide bearing 82 and abuts the thrust bearing 83 and the impeller 20, respectively.

The second sleeve 70 not only prevents the main shaft 50 from being worn out by contact with the guide bearing 82 and the thrust bearing 83, but also serves as a stopper for the impeller 20.

In other embodiments, the second sleeve 70 may not be provided, for example, the main shaft 50 may be directly coupled to the guide bearing 82 and the thrust bearing 83.

The thrust bearing 83 is used to bear the axial force of the main shaft 50, the thrust bearing 83 is disposed in the mounting channel 81a of the sealing body 81, the thrust bearing 83 can be fixed conveniently, and similarly, fluid such as water in the pump casing 10 can enter the mounting channel 81a to lubricate the thrust bearing 83.

Further, referring to fig. 1 to 3, each sealing member 80 may further be provided with a switching valve 84 and an end cap 85 having a through hole, the end cap 85 being provided at the corresponding opening, and the switching valve 84 being provided at the through hole.

The type of the switching valve 84 is not limited, and the switching valve 84 may be a ball valve as shown in fig. 1, for example.

The on-off valve 84 may be used to regulate the flow within the pump housing 10 to act as a restriction.

In the description of the present application, reference to the terms "one embodiment," "in some embodiments," "in other embodiments," "in yet other embodiments," or "exemplary" etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the embodiments of the present application. In this application, the schematic representations of the above terms are not necessarily for the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the various embodiments or examples described herein, as well as the features of the various embodiments or examples, may be combined by those skilled in the art without contradiction.

The foregoing description is only of the preferred embodiments of the present application and is not intended to limit the same, but rather, various modifications and variations can be made by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application are included in the protection scope of the present application.

Claims

1. A centrifugal canned motor pump, comprising:

the pump shell is provided with a water inlet and a water outlet;

an impeller disposed within the pump housing;

2. The centrifugal canned motor pump according to claim 1 wherein the number of the impellers and the number of the rotors are two, the two rotors are respectively arranged on two opposite sides of the stator in the axial direction, and the rotors are connected with the impellers in a one-to-one correspondence.

3. A centrifugal canned pump according to claim 1 or 2 wherein the impeller has an end face facing the axial flux motor, at least part of the outer surface of the rotor facing the impeller being in contact with the end face.

4. A centrifugal canned motor pump according to claim 1 or 2 wherein the rotor is annular, the impeller has a boss at one end adjacent the axial flux motor, and the rotor is sleeved on the boss.

5. The centrifugal canned pump according to claim 4 wherein the rotor is thermally secured to the boss.

6. The centrifugal canned pump according to claim 1 or 2 wherein the axial flux motor further comprises a canned motor, the canned motor being wrapped around an outer surface of the stator.

7. A centrifugal canned pump according to claim 1 or 2, wherein the axial flux motor comprises a housing, the stator being arranged within the housing;

the shell is in sealing fit with the pump shell; and/or the number of the groups of groups,

the rotor is located outside the housing, and a side of the housing facing the rotor is open.

8. The centrifugal shield pump according to claim 1 or 2, comprising a terminal post having a wiring channel provided on the pump housing, the wiring channel communicating with the interior of the pump housing.

9. The centrifugal canned motor pump according to claim 1 or 2 further comprising a rotatable spindle, the impeller having a first shaft bore, the axial flux motor comprising a housing having a second shaft bore, the stator being disposed within the housing, the spindle being disposed through the first shaft bore and the second shaft bore.

10. The centrifugal canned motor pump according to claim 9 comprising a first sleeve sleeved on the main shaft, the first sleeve being threaded in the second shaft bore and abutting the impeller.

11. The centrifugal shield pump according to claim 9, wherein the opposite ends of the casing in the axial direction have open openings, respectively, and the centrifugal shield pump further comprises two sealing members which seal the openings in one-to-one correspondence.

12. The centrifugal canned motor pump according to claim 11 wherein each of the seal members includes a seal body having a mounting channel and a guide bearing disposed within the mounting channel, the seal body being disposed within the pump housing and in sealing engagement with the pump housing, the spindle being disposed through the guide bearing.

13. The centrifugal canned pump according to claim 12 wherein each sealing member further comprises the thrust bearing disposed within the mounting channel, the main shaft being located on a side of the thrust bearing adjacent the axial flux motor.

14. The centrifugal canned motor pump according to claim 13 comprising a second sleeve sleeved on the main shaft, the second sleeve being threaded in the guide bearing and abutting the thrust bearing and the impeller, respectively.

15. The centrifugal canned motor pump according to claim 11 wherein each of the seal members further comprises an on-off valve provided at the corresponding opening and an end cap having a through hole at which the on-off valve is provided.