CN113464491A - Pump housing of canned motor pump and canned motor pump - Google Patents

Abstract

The invention relates to a pump shell of a canned motor pump and the canned motor pump, wherein the pump shell comprises an isolation sheath and a pump shell sleeve, the pump shell sleeve comprises a sleeve body and a connecting part connected with the sleeve body, the connecting part comprises a contact pin assembly, the contact pin assembly comprises a contact pin base and a contact pin penetrating through the contact pin base, the contact pin base comprises an inner contact pin base and an outer contact pin base, the sleeve body comprises an inner sleeve and an outer sleeve which are fixed with each other, the inner sleeve is positioned in an inner cavity of the outer sleeve and is a coaxial cylinder with the outer sleeve, and a first sealing groove is an annular groove. The pump shell of the canned motor pump and the canned motor pump are in a regular cylindrical shape as a whole, the part where the bottom part is fixed with the bottom cover is in a regular annular shape, and the canned motor pump is suitable for installing a sealing ring in a regular shape, such as an O-shaped ring, which is easy to produce and obtain, and can greatly improve the production efficiency of the canned motor pump.

Description

Pump housing of canned motor pump and canned motor pump

Technical Field

The invention belongs to the technical field of pumps, and particularly relates to a pump shell of a canned motor pump and the canned motor pump.

Background

The canned motor pump is an absolutely leakless pump in which a pump housing and a drive motor are integrated. At present, a micro shield pump is generally used in a cooling liquid circulation system of an electric automobile, and for the micro shield pump with a pump shell formed by integrally molding a pump shell sleeve and an isolation sleeve, as shown in fig. 1, a stator of the micro shield pump needs to be installed from the bottom of the pump shell sleeve, the lower end of the pump shell sleeve is opened and fixed with a bottom cover of the shield pump, because the bottom cover is generally provided with a circuit board, a power supply contact pin is arranged at the lower end of the pump shell sleeve, one end of the power supply contact pin is connected with the circuit board, and the other end of the power supply contact pin is connected with an external power supply, a pin seat (comprising an inner pin seat 2 ' and an outer pin seat 3 ') for accommodating the power supply contact pin can occupy a certain space at the bottom of the pump shell sleeve, so that the bottom of the pump shell sleeve is integrally shaped, and a sealing groove 1 ' at the bottom for accommodating a sealing ring needs to be shaped. The bottom cover needs to be shaped, so that production is inconvenient, the sealing ring for sealing and fixing the bottom of the pump shell sleeve and the bottom cover needs to be a special-shaped ring, and failure problems can be caused due to the inconvenience in mounting the special-shaped ring in the production process, so that sealing is unreliable; in addition, the installation of the special-shaped ring is time-consuming, so that the production efficiency is low.

Disclosure of Invention

Based on this, the invention aims to provide a pump shell of a canned motor pump, which solves the problem that the bottom of the original pump shell sleeve is in a special shape, the part of the bottom of the original pump shell sleeve fixed with a bottom cover is in a regular ring shape, and the pump shell is suitable for installing rubber rings which are easy to produce and obtain and have regular shapes, such as O-shaped rings, and can greatly improve the production efficiency of the canned motor pump.

The utility model provides a pump case of canned motor pump, is including keeping apart sheath and pump case sleeve, the telescopic top of pump case with it is fixed to keep apart the sheath, its bottom opening, the pump case sleeve include the sleeve body with connect in the connecting portion of sleeve body, connecting portion are located the telescopic bottom of pump case, including connecting portion body and contact pin subassembly, first seal groove has been seted up on the connecting portion body, the contact pin subassembly includes the contact pin seat and wears to locate contact pin in the contact pin seat, the contact pin seat is including being located the inboard interpolation needle file of first seal groove with be located the outer needle file in the first seal groove outside, its characterized in that: the sleeve body comprises an inner sleeve and an outer sleeve which are fixed with each other, the inner sleeve is positioned in an inner cavity of the outer sleeve and is a coaxial cylinder body with the outer sleeve, and the first sealing groove is an annular groove.

The pump housing of the canned motor pump according to the invention is, on the one hand, comparable to conventional pump housings, due to the double-layer design of the pump housing sleeve, so that the inner sleeve is contacted with the outer side of the stator, a certain space is formed between the right lower part of the inner sleeve and the outer sleeve, the possibility of arranging the inner needle inserting seat at the bottom of the pump shell sleeve at the inner side of the outer sleeve is provided, therefore, the bottom (connecting part) of the pump shell sleeve does not need to be specially designed to accommodate the inner inserting needle seat, the first sealing groove arranged on the connecting part for connecting with the bottom cover of the shielding pump is annular, the annular groove is specifically a regular annular groove, and comprises a circular ring shape, an elliptical ring shape, a square ring shape and the like, the sealing ring for sealing and fixing the pump shell sleeve and the bottom cover can be a sealing ring with a regular shape, such as an O-shaped ring, an oval ring or a square ring, and the like, so that the production is facilitated and the production efficiency is improved; on the other hand, the pump casing sleeve is designed into a double-layer structure of the inner sleeve and the outer sleeve instead of integrating the inner sleeve and the outer sleeve into a sleeve, and the defects of injection molding shrinkage cavity and the like caused by thick wall thickness can be effectively avoided for the pump casing sleeve manufactured by injection molding.

Further, the pump casing sleeve also comprises a sleeve connecting part used for connecting the inner sleeve and the outer sleeve, the sleeve connecting part, the inner sleeve and the outer sleeve jointly enclose a second annular groove, and the opening of the second annular groove faces upwards or downwards. The second annular groove can reduce weight and injection molding reject ratio, and can play a role in damping vibration when the canned motor pump runs, and simultaneously reduce noise; the opening of the second annular groove can be upward or downward, and if the opening is upward, the cooling liquid can be conveniently injected into the second annular groove for cooling the stator.

Further, the pump casing sleeve further comprises a first reinforcing rib arranged in the second annular groove, and the first reinforcing rib is connected with the inner sleeve and the outer sleeve. The strength of the sleeve body can be improved through the arrangement of the first reinforcing ribs, and the first reinforcing ribs are preferably uniformly distributed in the circumferential direction.

Furthermore, the inner pin inserting seat is connected with and protrudes from the inner wall of the connecting part body; the pump shell sleeve further comprises a first bump, the first bump is fixed on the inner wall of the outer sleeve and connected with the sleeve connecting portion and the inner inserting needle seat, and the minimum distance from the first bump to the axis is not greater than the minimum distance from the inner inserting needle seat to the axis and not less than the inner diameter of the inner sleeve. For the pump shell manufactured by adopting the injection molding method, a mode of demoulding from top to bottom is generally adopted, and because the inner needle inserting seat is positioned at the bottom of the pump shell sleeve and is convexly arranged, if the first convex block is not arranged, demoulding can be caused.

Furthermore, the outer wall of the pump shell sleeve is provided with a third groove, and the first lug and the third groove are respectively located at corresponding positions of the pump shell sleeve. Due to the arrangement of the first bump, the total thickness of the outer sleeve and the first bump is thicker, and for the pump shell of injection molding, compared with other positions of the outer sleeve, the pump shell is more prone to generating injection molding shrinkage holes and other defects, so that the injection molding thickness is uniform through the arrangement of the third groove, and the injection molding defects can be effectively eliminated. The third groove can be only formed on the outer sleeve; the third groove may be recessed more from the outer side of the outer sleeve and penetrate through the outer sleeve wall, and then extend to the first protrusion and recess. Preferably, the pump casing sleeve further comprises a second reinforcing rib, and the second reinforcing rib is convexly fixed on the bottom surface of the third groove and connected with two opposite wall surfaces of the third groove. Through the setting of second strengthening rib, effectively increase the intensity at third recess position.

Furthermore, the pump casing sleeve also comprises a third reinforcing rib, the third reinforcing rib is convexly fixed on the bottom surface of the third groove and connected with the other two opposite wall surfaces of the third groove, and the distance from the outer side surface of the second reinforcing rib to the axis is greater than the outer diameter of the outer sleeve. The strength of the third groove can be further enhanced by the arrangement of the third reinforcing rib. In addition, when the shielding pump is applied to an automobile, the shielding pump needs to be fixed with a mounting bracket (generally made of rubber) on the automobile, the distance between the outer side surface of the second reinforcing rib and the axis is larger than the outer diameter of the outer sleeve, namely, the second reinforcing rib rubber protrudes out of the outer sleeve, and meanwhile, a groove is correspondingly formed in the mounting bracket, so that the second reinforcing rib can be clamped in the groove, and the shielding pump is favorably prevented from sliding in the circumferential direction relative to the mounting bracket.

In one embodiment, the isolation sheath and the pump housing sleeve are integrally formed, and the minimum distance from the axis of the inner hub is smaller than the inner diameter of the outer sleeve but not smaller than the inner diameter of the inner sleeve. The pump casing integrated into one piece, it is convenient to make, because the minimum distance from the inner needle inserting base to the axle center is smaller than the inner diameter of the outer sleeve, not smaller than the inner diameter of the inner sleeve, namely the inner needle inserting base makes full use of the radial space between the inner sleeve and the outer sleeve, the first sealing groove between the inner needle inserting base and the outer needle inserting base can be arranged into a ring without enlarging the diameter, in addition, the above specific structure arrangement can also ensure that the stator can smoothly enter the space between the inner sleeve and the isolation sheath from the bottom of the pump casing sleeve when the shield pump is assembled.

Further, the connecting part body is annular, and the first seal groove is located the outside of outer sleeve. The first sealing groove can be arranged below the outer sleeve or on the outer side of the outer sleeve according to the different thicknesses of the outer sleeve; when the outer sleeve is arranged on the outer side of the outer sleeve, the pump shell sleeve is enabled to have a certain expansion space outwards in the radial direction, and the inner inserting needle base can be ensured to be positioned in the first sealing groove while the wall thickness of the outer sleeve is reduced.

The invention also provides a shield pump which is characterized by comprising a pump cover, a bottom cover, a stator and the pump shell, wherein the pump cover is fixed with one end of the pump shell, the bottom cover is fixed with the opening end of the pump shell, and the stator is arranged between the isolation sheath and the inner sleeve.

According to the shield pump, due to the specific structural arrangement of the pump shell, the connecting surface of the bottom cover and the pump shell is annular, so that the pump shell and the bottom cover are more convenient to produce; and the sealing and fixing between the two parts can use a sealing ring with a regular shape, such as an O-shaped ring, the sealing ring with the regular shape is more conventional and easy to obtain, the installation and operation of workers are facilitated, and the production efficiency of the canned motor pump is greatly improved.

Drawings

FIG. 1 is a bottom view of a prior art pump housing;

FIG. 2 is a sectional view of a pump casing according to an embodiment of example 1 of the present invention;

FIG. 3 is a top view of FIG. 2;

FIG. 4 is a bottom view of FIG. 2;

FIG. 5 is a bottom view of the pump housing of another embodiment of example 1 of the present invention;

FIG. 6 is a cross-sectional view A-A of FIG. 5;

FIG. 7 is a sectional view taken along line B-B of FIG. 5;

FIG. 8 is a schematic perspective view of a pump casing according to a preferred embodiment of example 1 of the present invention;

FIG. 9 is a schematic view of another perspective view of the pump housing of FIG. 8;

FIG. 10 is a schematic view of the pump housing of FIG. 8 in cooperation with a mounting bracket on an automobile;

FIG. 11 is a cross-sectional schematic view of FIG. 10;

FIG. 12 is a schematic cross-sectional view of a pump housing in accordance with one embodiment of the present invention in example 1 in cooperation with a mounting bracket on an automobile;

FIG. 13 is a cross-sectional view of a canned motor pump according to an embodiment of example 2 of the present invention;

FIG. 14 is a cross-sectional view of a canned motor pump according to another embodiment of example 2 of the present invention;

in the figure:

1 ' sealing groove, 2 ' -inner needle inserting seat, 3 ' -outer needle inserting seat, 1-isolating sheath, 2-pump shell sleeve, 21-sleeve body, 211-inner sleeve, 212-outer sleeve, 213-sleeve connecting part, 214-second annular groove, 215-first reinforcing rib, 22-connecting part, 221-connecting part body, 2211-first sealing groove, 222-inner needle inserting seat, 223-outer needle inserting seat, 224-inserting needle, 23-first bump, 24-third groove, 25-second reinforcing rib, 26-third reinforcing rib, 231-first surface, 3-pump cover, 4-bottom cover, 5-O-shaped ring, 6-stator, 7-mounting bracket and 71-groove.

Detailed Description

In order that the invention may be more fully understood, reference will now be made to the following description. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

Example 1

As shown in fig. 2 to 11, the pump housing of the canned motor pump of this embodiment includes an isolation sheath 1 and a pump housing sleeve 2, the top end of the pump housing sleeve 2 is fixed to the isolation sheath 1, and the bottom end of the pump housing sleeve 2 is open, the pump housing sleeve 2 includes a sleeve body 21 and a connection portion 22 connected to the sleeve body 21, the connection portion 22 is located at the bottom end of the pump housing sleeve 2, and includes a connection portion body 221 and a pin assembly, a first sealing groove 2211 is formed on the connection portion body 221, the pin assembly includes a pin base and a pin 224 penetrating through the pin base, the pin base includes an inner pin base 222 located inside the first sealing groove 2211 and an outer pin base 223 located outside the first sealing groove 2211, the sleeve body 21 includes an inner sleeve 211 and an outer sleeve 212 fixed to each other, the inner sleeve 211 is located in an inner cavity of the outer sleeve 212 and is a coaxial cylinder with the outer sleeve 212, and the first sealing groove 2211 is an annular groove.

In the pump casing of the embodiment, on one hand, through the double-layer design of the pump casing sleeve 2, compared with the conventional pump casing, the inner sleeve 211 can be contacted with the outer side of the stator, and because a certain space is formed between the position right below the inner sleeve 211 and the outer sleeve 212, the possibility that the inner inserting needle seat 222 at the bottom of the pump casing sleeve 2 is arranged inside the outer sleeve 212 is provided, so that the bottom of the pump casing sleeve 2 (namely, the connecting part 22) does not need to be specially designed to accommodate the inner inserting needle seat 222, and a first sealing groove 2211 arranged on the connecting part 22 for connecting with a bottom cover of a shield pump is annular, and a sealing ring for sealing and fixing the pump casing sleeve 2 and the bottom cover can be an O-shaped ring, thereby facilitating the production and improving the production efficiency; on the other hand, the pump casing sleeve 2 is designed to be a double-layer structure of the inner sleeve 211 and the outer sleeve 212, rather than integrating the two into one sleeve, and for the pump casing sleeve 2 manufactured by injection molding, the defects of injection molding shrinkage cavity and the like caused by thick wall thickness can be effectively avoided.

As an embodiment, the pump casing sleeve 2 may further include a sleeve connection portion 213 for connecting the inner sleeve 211 and the outer sleeve 212, and the sleeve connection portion 213, together with the inner sleeve 211 and the outer sleeve 212, encloses a second annular groove 214 that is open upward or downward. The second annular groove can reduce weight and injection molding reject ratio, and can play a role in damping vibration of the canned motor pump during operation and reduce noise; the second annular groove may be open both upwardly and downwardly, and in one embodiment, as shown in fig. 2-4, the second annular groove 214 is open upwardly in a manner that facilitates the injection of cooling fluid into the second annular groove for stator cooling; in another embodiment, as shown in FIGS. 5-7, the second annular groove 214 opens downwardly. As a preferred embodiment, the pump casing sleeve 2 may further include first reinforcing ribs 215 disposed in the second annular groove 214, the first reinforcing ribs 215 connecting the inner sleeve 211 and the outer sleeve 212. The strength of the sleeve body 21 can be increased by providing the first reinforcing rib 215, and it is preferable that a plurality of first reinforcing ribs 215 are provided and uniformly distributed in the circumferential direction, as shown in fig. 3 and 5.

As a preferred embodiment, the inner hub 222 is connected to and protrudes from the inner wall of the connecting portion body 221, the pump casing sleeve 2 may further include a first protrusion 23, the first protrusion 23 is fixed on the inner wall of the outer sleeve 212, whether the second annular groove 214 is opened upward (as shown in fig. 2) or opened downward (as shown in fig. 6 and 7), the first protrusion 23 connects the sleeve connecting portion 213 with the inner hub 222; the minimum distance from the first protrusion 23 to the axial center is not more than the minimum distance from the inner hub 222 to the axial center and not less than the inner diameter of the inner sleeve 211. in this preferred embodiment, it is very advantageous for the pump housing manufactured by injection molding, because the injection molding generally adopts the mode of demolding from top to bottom, and the inner hub 222 is located at the bottom of the pump housing sleeve 2 and is arranged in a protruding manner, if the first protrusion 23 is not provided, demolding is not possible. In a further preferred embodiment, as shown in fig. 8, a third groove 24 may be formed on an outer wall of the pump casing sleeve 2, referring to fig. 6, 8 and 9, respectively, the first protrusion 23 and the third groove 24 are located at corresponding positions of the pump casing sleeve 2, due to the arrangement of the first protrusion 23, a total thickness of the outer sleeve 212 and the first protrusion 23 is relatively thick, for the pump casing formed by injection molding, the outer sleeve 212 and the first protrusion 23 are integrally injection molded, and compared with other positions of the outer sleeve 212, defects such as injection shrinkage holes and the like are more likely to be generated, and through the arrangement of the third groove 24 and the first protrusion 23, the injection molding thickness is uniform, and the injection molding defects can be effectively eliminated. The third groove can be only formed on the outer sleeve; it is also possible that the third recesses 24 are recessed more inwardly from the outer wall surface of the outer sleeve, as shown in fig. 6 and 8, and have a depth greater than the thickness of the outer sleeve 212, not only penetrating the outer sleeve wall, but also extending to and recessed within the first protrusions 23. In one embodiment, as shown in fig. 5 and 8, the first protrusion 23 includes a first surface 231 facing the axis, and the bottom surfaces of the first surface 231 and the third groove 24 are both arc surfaces. On the other hand, as a preferred embodiment, because the third groove 24 may weaken the strength of the third groove 24, the pump casing sleeve 2 may further include a second rib 25, the second rib 25 is fixed to the bottom surface of the third groove 24 in a protruding manner and is connected to two opposite wall surfaces of the third groove 24, and the strength of the third groove 24 can be effectively increased by the arrangement of the second rib 25. In a further preferred embodiment, the pump casing sleeve 2 may further include a third rib 26, the strength of the third groove 24 may be further enhanced by the arrangement of the second rib 26, the third rib 26 is convexly fixed on the bottom surface of the third groove 24 and connected with the other two wall surfaces opposite to the third groove 24, the third rib 26 intersects with the second rib 25, in a specific embodiment, the second rib 25 extends along the axial direction of the sleeve body 21, and the second rib 26 and the second rib 25 are perpendicular to each other, as shown in fig. 8; the distance between the outer side surface of the second reinforcing rib 25 and the axis is preferably larger than the outer diameter of the outer sleeve 212, because the shield pump is required to be fixed with the mounting bracket 7 on the automobile when being applied to the automobile, the distance between the outer side surface of the second reinforcing rib 25 and the axis is larger than the outer diameter 212 of the outer sleeve, namely, the second reinforcing rib 25 protrudes out of the outer sleeve, and meanwhile, a groove 71 is correspondingly arranged on the mounting bracket 7, so that the second reinforcing rib 25 can be clamped in the groove 71, and the shield pump is favorably prevented from sliding relative to the mounting bracket 7 in the circumferential direction. Of course, other corresponding matching structures may be provided between the second reinforcing rib and the mounting bracket, as long as the shielding pump can be prevented from sliding in the circumferential direction relative to the mounting bracket 7. For example, the outer side surface of the second rib may be located on the same arc surface as the outer surface of the outer sleeve 212, or the second rib may be completely disposed in the third groove 24, and accordingly, a protrusion protruding toward the third groove is disposed on the mounting bracket 7, and then a groove for engaging with the second rib is disposed on the protrusion, as shown in fig. 12. As an embodiment, the isolation sheath 1 and the pump housing sleeve 2 may be integrally formed, and the minimum distance from the axis of the inner hub is smaller than the inner diameter of the outer sleeve but not smaller than the inner diameter of the inner sleeve. The pump casing integrated into one piece, it is convenient to make, because the minimum distance from the inner needle inserting base to the axle center is smaller than the inner diameter of the outer sleeve, not smaller than the inner diameter of the inner sleeve, namely the inner needle inserting base makes full use of the radial space between the inner sleeve and the outer sleeve, the first sealing groove between the inner needle inserting base and the outer needle inserting base can be arranged into a ring without enlarging the diameter, in addition, the above specific structure arrangement can also ensure that the stator can smoothly enter the space between the inner sleeve and the isolation sheath from the bottom of the pump casing sleeve when the shield pump is assembled.

In one embodiment, the connecting body 221 is annular, and the first sealing groove 2211 is located outside the outer sleeve 212, as shown in fig. 2 and 6. The first sealing groove 2211 may be disposed below the outer sleeve 212 or outside the outer sleeve 212 according to the thickness of the outer sleeve 212; when disposed below the outer sleeve 212, the outer sleeve 212 needs to be thicker, which may cause poor injection molding; when the pump casing sleeve 2 is disposed outside the outer sleeve 212, a certain expansion space is provided radially outward, so that the inner needle holder 222 can be ensured to be located inside the first sealing groove 2211 while the wall thickness of the outer sleeve is reduced.

Example 2

As shown in fig. 13 to 14, the canned motor pump of the present embodiment includes a pump cover 3, a bottom cover 4, a stator 6 and a pump housing of the present invention, wherein an isolation sheath 1 is used for accommodating the rotor assembly, the pump cover 3 is fixed to one end of the pump housing, the bottom cover 4 is fixed to a connecting portion 22 at an opening end of the pump housing, when the bottom cover 4 is sealed and fixed to the pump housing, the O-ring 5 is disposed in the first sealing groove 2211, and the stator 6 is disposed between the isolation sheath 1 and the inner sleeve 211. FIG. 12 shows a cross-sectional view of the canned motor pump with the second annular groove 214 opening upward; fig. 13 is a cross-sectional view of the canned motor pump with the second annular groove 214 opening downward.

According to the shield pump, due to the specific structure of the pump shell, the connecting surface of the bottom cover and the pump shell is annular, so that the pump shell and the bottom cover are more convenient to produce; and the sealing and fixing between the two parts can use a sealing ring with a regular shape, such as an O-shaped ring, the sealing ring with the regular shape is more conventional and easy to obtain, the installation and operation of workers are facilitated, and the production efficiency of the canned motor pump is greatly improved.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships that are based on the description of the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, should not be construed as limiting the present invention. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention.

Claims (10)

1. The utility model provides a pump case of canned motor pump, is including keeping apart sheath and pump case sleeve, the telescopic top of pump case with it is fixed to keep apart the sheath, its bottom opening, the pump case sleeve include the sleeve body with connect in the connecting portion of sleeve body, connecting portion are located the telescopic bottom of pump case, including connecting portion body and contact pin subassembly, first seal groove has been seted up on the connecting portion body, the contact pin subassembly includes the contact pin seat and wears to locate contact pin in the contact pin seat, the contact pin seat is including being located the inboard interpolation needle file of first seal groove with be located the outer needle file in the first seal groove outside, its characterized in that: the sleeve body comprises an inner sleeve and an outer sleeve which are fixed with each other, the inner sleeve is positioned in an inner cavity of the outer sleeve and is a coaxial cylinder body with the outer sleeve, and the first sealing groove is an annular groove.

2. The pump housing of the canned pump of claim 1, wherein: the pump shell sleeve further comprises a sleeve connecting part used for connecting the inner sleeve and the outer sleeve, the sleeve connecting part, the inner sleeve and the outer sleeve jointly enclose a second annular groove, and the opening of the second annular groove faces upwards or downwards.

3. The pump housing of the canned pump of claim 2, wherein: the pump shell sleeve further comprises a first reinforcing rib arranged in the second annular groove, and the first reinforcing rib is connected with the inner sleeve and the outer sleeve.

4. The pump housing of the canned pump of claim 2, wherein: the inner pin inserting seat is connected with and protrudes from the inner wall of the connecting part body; the pump shell sleeve further comprises a first bump, the first bump is fixed on the inner wall of the outer sleeve and connected with the sleeve connecting portion and the inner inserting needle seat, and the minimum distance from the first bump to the axis is not greater than the minimum distance from the inner inserting needle seat to the axis and not less than the inner diameter of the inner sleeve.

5. The pump housing of the canned pump of claim 4, wherein: the outer wall of the pump shell sleeve is provided with a third groove, and the first lug and the third groove are respectively located at corresponding positions of the pump shell sleeve.

6. The pump housing of the canned pump of claim 5, wherein: the pump shell sleeve further comprises a second reinforcing rib, and the second reinforcing rib is convexly fixed on the bottom surface of the third groove and connected with two opposite wall surfaces of the third groove.

7. The pump housing of the canned pump of claim 6, wherein: the pump shell sleeve further comprises a third reinforcing rib, the third reinforcing rib is convexly fixed on the bottom surface of the third groove and connected with the other two opposite wall surfaces of the third groove, and the distance from the outer side surface of the second reinforcing rib to the axis is larger than the outer diameter of the outer sleeve.

8. The pump housing of the canned pump of claim 1, wherein: the isolation sheath and the pump shell sleeve are integrally formed, and the minimum distance from the inner needle inserting seat to the axis is smaller than the inner diameter of the outer sleeve but not smaller than the inner diameter of the inner sleeve.

9. The pump housing of the canned pump of claim 1, wherein: the connecting part body is annular, and the first seal groove is located the outside of outer sleeve.

10. A canned motor pump comprising a pump cover, a bottom cover, a stator, and the pump housing of any one of claims 1 to 9, wherein the pump cover is fixed to one end of the pump housing, the bottom cover is fixed to an open end of the pump housing sleeve, and the stator is disposed between the isolation sheath and the inner sleeve.

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