CN114001034B - Connection structure of slide bearing and rotor and magnetic drive pump - Google Patents

Abstract

The utility model provides a connection structure of slide bearing and rotor, includes rotor and slide bearing that sets up on the pump shaft, the rotor includes impeller and interior magnetic rotor, its characterized in that: the inner magnetic rotor is arranged at the rear side of the impeller and is coaxially arranged on the pump shaft, the front end of the inner magnetic rotor stretches into the impeller and is fixedly connected with the impeller, the sliding bearing is coaxially sleeved between the pump shaft and the inner magnetic rotor, and the gravity center of the rotator coincides with that of the sliding bearing. The connecting structure of the sliding bearing and the rotating body has the advantages of reduced overall radial size, compact structure, stable and reliable operation of the rotating body and prolonged service life. In addition, a magnetic pump is also provided.

Description

Connection structure of slide bearing and rotor and magnetic drive pump

Technical Field

The invention relates to the technical field of magnetic pumps, in particular to a connecting structure of a sliding bearing and a rotating body and a magnetic pump.

Background

The Chinese patent with the publication number of CN207598516U discloses a magnetic pump, the structure of which is shown in figure 1, and comprises a pump body 1a, a suspension body 2a, an impeller 3a, a pump shaft 4a, an inner magnetic rotor 5a, an outer magnetic rotor 6a, a spacer 7a, an outer magnetic shaft 8a and a motor 9a; the pump body 1a and the suspension body 2a are fixedly connected into a whole; the outer magnetic rotor 6a is rotatably arranged in the suspension body 2a through an outer magnetic shaft 8a, and the outer magnetic shaft 8a is in transmission connection with the motor 9a; the isolation sleeve 7a is arranged in a cavity formed by the pump body 1a and the suspension body 2a, and the main body part of the isolation sleeve 7a is positioned in the outer magnetic rotor 6 a; one end of the pump shaft 4a is fixed on the isolation sleeve 7a, and the other end is fixed on the pump body 1a through a pump shaft bracket; the impeller 3a is rotatably arranged on the pump shaft 4a, the inner magnetic rotor 5a is fixed at the tail part of the impeller 3a, and the inner magnetic rotor 5a is positioned at the inner side of the main body part of the isolation sleeve 7 a; the tail part of the impeller 3a is provided with a rotating sleeve 10a, the impeller 3a is sleeved on the pump shaft 4a through the rotating sleeve 10a, the pump shaft 4a is provided with a wear-resistant shaft sleeve 11a, and a sliding bearing 12a is arranged between the wear-resistant shaft sleeve 11a and the rotating sleeve 10 a.

The existing magnetic pump has the following technical problems: since the inner magnetic rotor 5a is sleeved outside the impeller 3a, in order to realize the rotation of the inner magnetic rotor 5a and the whole rotor of the impeller 3a, the rotation is realized by adding a rotating sleeve 10a at the tail part of the impeller 3a and arranging a sliding bearing 12a between the rotating sleeve 10a and the pump shaft 4 a; the tail part of the impeller 3a is additionally provided with a rotating sleeve 10a, so that the radial dimension of the whole body is necessarily increased after the installation, and the structure is not compact; in addition, since the impeller 3a is heavier than the inner magnetic rotor 5a, the center of gravity of the rotor should be deviated toward the impeller 3a, and the slide bearing 12a is regularly symmetrical, the center of gravity of which is the axis thereof, but as can be seen from fig. 1, the slide bearing 12a is installed on the side deviated toward the inner magnetic rotor 5a, and thus the center of gravity of the inner magnetic rotor 5a and the impeller 3a as a whole of the rotor is not coincident with the center of gravity of the slide bearing 12a, resulting in an insufficient smooth and reliable operation of the rotor, and a shortened service life of the slide bearing 12 a.

Disclosure of Invention

The invention aims to solve the technical problems that: the connecting structure of the sliding bearing and the rotating body is reduced in overall radial dimension, compact in structure, stable and reliable in running of the rotating body and prolonged in service life of the sliding bearing.

The technical scheme of the invention is as follows: the utility model provides a connection structure of slide bearing and rotor, includes rotor and slide bearing that sets up on the pump shaft, the rotor includes impeller and interior magnetic rotor, its characterized in that: the inner magnetic rotor is arranged at the rear side of the impeller and is coaxially arranged on the pump shaft, the front end of the inner magnetic rotor stretches into the impeller and is fixedly connected with the impeller, the sliding bearing is coaxially sleeved between the pump shaft and the inner magnetic rotor, and the gravity center of the rotator coincides with that of the sliding bearing.

After the structure is adopted, the invention has the following advantages:

The connecting structure of the sliding bearing and the rotating body is provided with the structure that the front end of the inner magnetic rotor stretches into the impeller, the sliding bearing is directly arranged in the inner magnetic rotor, the sliding bearing is not required to be arranged by additionally arranging the rotating sleeve at the tail part of the impeller, the overall radial size is reduced after the sliding bearing is arranged, and the structure is compact; the gravity center of the rotating body is overlapped with that of the sliding bearing, so that the rotating body can stably and reliably run, and the service life of the sliding bearing is prolonged.

Further, the weight of the inner magnetic rotor is matched with that of the impeller, so that the gravity center of the rotating body is exactly positioned on the axle center of the rotating body, and the sliding bearing is arranged in the middle of the rotating body. Because the weight of the impeller is heavier than that of the inner magnetic rotor in general, the gravity center is deviated to one side of the impeller, and the gravity center of the sliding bearing is actually the axle center of the impeller, so that when the sliding bearing is arranged in the middle of the rotating body, the gravity center of the rotating body cannot be overlapped with the gravity center of the sliding bearing, and when the sliding bearing is arranged in the middle of the rotating body, the rotating body can operate more stably and reliably, therefore, the gravity center of the rotating body can be moved to the axle center by increasing the weight of the inner magnetic rotor to match with the weight of the impeller, and when the sliding bearing is arranged in the middle of the rotating body, the gravity center of the rotating body can just fall at the gravity center of the sliding bearing, the rotating body can operate more stably and reliably, and the service life of the sliding bearing is longer.

Further, the outer ring of the sliding bearing and the inner magnetic rotor synchronously rotate, the inner ring is rotationally connected with the pump shaft, and at least one first O-shaped ring which is tightly matched with the outer ring of the sliding bearing is embedded on the inner side wall of the inner magnetic rotor and is used for axially fixing the outer ring of the sliding bearing and preventing radial rotation so as to drive the outer ring of the sliding bearing and the inner magnetic rotor to synchronously rotate. The arrangement actually adopts a structure that the pump shaft is not moved and the sliding bearing rotates along with the inner magnetic rotor, so that thrust rings on two sides of the sliding bearing are omitted, the abrasion of the sliding bearing and the thrust rings is avoided, and the axial length is reduced; secondly, the outer ring of the sliding bearing is axially fixed and prevented from rotating radially by compression of the O-shaped ring, the O-shaped ring is convenient to process and install and good in coaxiality, and damage caused by reverse rotation of the magnetic pump can be effectively prevented; in addition, the O-shaped ring can buffer impact generated in the running process, and the use safety is higher.

Further, a first O-shaped ring groove for installing a first O-shaped ring is formed in the inner side wall of the inner magnetic rotor. The first O-shaped ring groove is formed in the inner side wall of the inner magnetic rotor, so that the first O-shaped ring is embedded in the inner side wall of the inner magnetic rotor, and the inner magnetic rotor is more convenient and reliable to install and more compact in structure.

Further, the front end of the impeller is provided with at least one fastener for connecting the front end of the impeller and the front end of the inner magnetic rotor. The front end of the inner magnetic rotor is arranged to extend into the impeller, and the front end of the impeller is provided with the fastener, so that compared with the existing key connection structure, the novel impeller has the advantages that keys and key grooves are not required to be arranged on two working surfaces, namely the inner side wall of the impeller and the outer side wall of the inner magnetic rotor, the requirement on radial space is small, the structure is compact, the strength requirement on the impeller is low, and the cost is reduced.

Further, at least one of the connecting holes of the impeller, the inner magnetic rotor and the fastening piece is provided with a through hole which can be communicated with the front end face of the sliding bearing and is used for ejecting the sliding bearing through the through hole. The through holes are arranged, so that the impeller and the inner magnetic rotor are fixed, the sliding bearing is convenient to detach, and the sliding bearing can be ejected out through the through holes only by using an ejection piece thinner than a fastener during detachment.

The invention aims to solve the other technical problems that: the magnetic pump has the advantages of reduced overall radial size, compact structure, stable and reliable running of the rotating body and prolonged service life of the sliding bearing.

The other technical solution of the invention is as follows: the utility model provides a magnetic drive pump, includes the pump body, suspension body and pump shaft, the pump body and suspension body fixed connection, the pump shaft level is fixed in the cavity that pump body and suspension body formed, its characterized in that: the pump shaft is provided with a connecting structure of the sliding bearing and the rotating body.

After the structure is adopted, the invention has the following advantages:

The magnetic pump is provided with the front end of the inner magnetic rotor penetrating into the impeller, and the sliding bearing is directly arranged in the inner magnetic rotor, so that a rotating sleeve is not required to be additionally arranged at the tail part of the impeller to install the sliding bearing, the overall radial size is reduced after the installation, and the structure is compact; the gravity center of the rotating body is overlapped with that of the sliding bearing, so that the rotating body can stably and reliably run, and the service life of the sliding bearing is prolonged; the magnetic pump adopts a structure that the pump shaft is not moved, and thrust rings on two sides of the sliding bearing can be omitted, so that abrasion of the sliding bearing and the thrust rings is avoided, and the axial length is reduced.

Further, the novel pump comprises a separation sleeve, wherein the separation sleeve is fixed in a cavity formed by a pump body and a suspension body and divides the cavity into a front cavity and a rear cavity, a pump shaft is horizontally fixed in the front cavity, one end of the pump shaft is inserted into the pump body and is fixedly sleeved with a second O-shaped ring embedded in the pump body, and the other end of the pump shaft is inserted into the separation sleeve and is fixedly sleeved with a third O-shaped ring embedded in the separation sleeve. One end of the pump shaft is fixed on the isolation sleeve, and the other end of the pump shaft is directly fixed on the pump body without an intermediate connecting part, so that the structure is simplified; the O-shaped ring is adopted for fixing, the axial fixing and radial rotation prevention of the pump shaft are realized by the compression of the O-shaped ring, the processing and the installation are convenient, the coaxiality is good, and the damage caused by the reverse rotation of the magnetic pump can be effectively prevented; in addition, the O-shaped ring can buffer impact generated in the running process, and the use safety is higher.

Further, the pump body comprises a front pump cover, a rear pump cover and a connecting shell which is detachably connected between the front pump cover and the rear pump cover, and one end of the pump shaft is inserted into the front pump cover of the pump body. The pump body is split into a front pump cover, a rear pump cover and a connecting shell which are detachably connected, so that the pump shaft, the inner magnetic rotor, the impeller, the sliding bearing and other parts can be conveniently installed.

Drawings

FIG. 1 is a schematic diagram of a conventional magnetic pump;

FIG. 2 is a schematic view of the structure of the connection structure of the sliding bearing and the rotator of the present invention mounted on a magnetic pump;

FIG. 3 is a cross-sectional view taken along line A-A' of FIG. 2;

In the prior art diagram: 1 a-a pump body, 2 a-a suspension body, 3 a-an impeller, 4 a-a pump shaft, 5 a-an inner magnetic rotor, 6 a-an outer magnetic rotor, 7 a-a spacer sleeve, 8 a-an outer magnetic shaft, 9 a-a motor, 10 a-a rotating sleeve, 11 a-an abrasion-resistant shaft sleeve and 12 a-a sliding bearing;

In the drawings of the invention: the novel hydraulic pump comprises a pump body, a 2-suspension body, a 3-pump shaft, a 4-sliding bearing, a 5-impeller, a 6-inner magnetic rotor, a 7-isolation sleeve, an 8-front cavity, a 9-rear cavity, a 10-second O-shaped ring, an 11-third O-shaped ring, a 12-front pump cover, a 13-rear pump cover, a 14-connecting shell, a 15-first O-shaped ring, a 16-second O-shaped ring groove, a 17-third O-shaped ring groove, a 18-first O-shaped ring groove, a 19-fastener, a 20-through hole, a 21-first groove and a 22-second groove.

Detailed Description

The invention will be further described with reference to the accompanying drawings, in conjunction with examples.

Example 1:

As shown in fig. 2 and 3, this embodiment provides a connection structure of a sliding bearing and a rotating body, including a rotating body and a sliding bearing 4, which are disposed on a pump shaft 3, the rotating body includes an impeller 5 and an inner magnetic rotor 6, the inner magnetic rotor 6 is disposed at a rear side of the impeller 5 and is coaxially mounted on the pump shaft 3, a front end of the inner magnetic rotor 6 extends into the impeller 5 and is fixedly connected with the impeller 5, the sliding bearing 4 is coaxially sleeved between the pump shaft 3 and the inner magnetic rotor 6, and a center of gravity of the rotating body coincides with a center of gravity of the sliding bearing 4.

The connecting structure of the sliding bearing and the rotating body is provided with the structure that the front end of the inner magnetic rotor 6 goes deep into the impeller 5, the sliding bearing 4 is directly arranged in the inner magnetic rotor 6, a rotating sleeve is not required to be additionally arranged at the tail part of the impeller 5 to install the sliding bearing 4, the whole radial size is reduced after installation, and the structure is compact; the gravity center of the rotating body is overlapped with the gravity center of the sliding bearing 4, so that the rotating body can stably and reliably run, and the service life of the sliding bearing 4 is prolonged.

Further, the weight of the inner magnetic rotor 6 is matched with the weight of the impeller 5 so that the center of gravity of the rotor is exactly located on the axis of the rotor, and the sliding bearing 4 is installed in the middle of the rotor. Since the weight of the impeller 5 is generally heavier than that of the inner magnetic rotor 6, the center of gravity of the impeller 5 is deviated, and the center of gravity of the sliding bearing 4 is actually the center of the axis, so that the center of gravity of the rotor cannot coincide with the center of gravity of the sliding bearing 4 when the sliding bearing 4 is installed in the middle of the rotor, and the rotor can be operated more stably and reliably when the sliding bearing 4 is installed in the middle of the rotor, the center of gravity of the rotor can be moved to the center of the axis by increasing the weight of the inner magnetic rotor 6 to match the weight of the impeller 5, so that the center of gravity of the rotor can be just located at the center of gravity of the sliding bearing 4 when the sliding bearing 4 is installed in the middle of the rotor, the rotor can be operated more stably and reliably, and the service life of the sliding bearing 4 is longer.

Further, the outer ring of the sliding bearing 4 and the inner magnetic rotor 6 synchronously rotate, the inner ring is rotationally connected with the pump shaft 3, and at least one first O-ring 15 which is tightly matched with the outer ring of the sliding bearing 4 is arranged on the inner side wall of the inner magnetic rotor 6 and is used for axially fixing the outer ring of the sliding bearing 4 and preventing radial rotation so as to drive the outer ring of the sliding bearing 4 and the inner magnetic rotor 6 to synchronously rotate. The outer ring of the sliding bearing 4 is axially fixed and prevented from rotating radially by compression of the O-shaped ring, the O-shaped ring is convenient to process and install and good in coaxiality, and damage caused by reverse rotation of the magnetic pump can be effectively prevented; in addition, the O-shaped ring can buffer impact generated in the running process, and the use safety is higher.

Further, a first O-ring groove 18 for mounting a first O-ring 15 is provided on the inner side wall of the inner magnetic rotor 6. The first O-shaped ring groove 18 is formed in the inner side wall of the inner magnetic rotor 6, so that the first O-shaped ring 15 is embedded in the inner side wall of the inner magnetic rotor 6, and the installation is more convenient and reliable, and the structure is more compact.

Further, two first O-rings 15 are provided. This arrangement ensures a good securement of the fixing between the slide bearing 4 and the inner magnetic rotor 6 without increasing the complexity of the structure too much.

Further, the front end of the impeller 5 is provided with at least one fastener 19 for connecting the front end of the impeller 5 and the front end of the inner magnetic rotor 6. The front end of the inner magnetic rotor 6 stretches into the impeller 5, and the fastening piece 19 is arranged at the front end of the impeller 5, so that compared with the existing key connection structure, keys and key grooves are not required to be arranged on two working surfaces, namely the inner side wall of the impeller 5 and the outer side wall of the inner magnetic rotor 6, the radial space requirement is small, the structure is compact, the strength requirement on the impeller 5 is low, and the cost is reduced.

Further, the fastener 19 is a hexagon socket head cap screw. The hexagon socket head cap screw is convenient to fasten and detach and occupies small space.

Further, the fasteners 19 are four and are uniformly distributed along the circumferential direction of the front end surface of the impeller 5. This arrangement makes the fixation of the impeller 5 and the inner magnetic rotor 6 more secure.

Further, at least one through hole 20 is provided in the connection hole of the impeller 5 and the inner magnetic rotor 6 with the fastener 19 so as to be communicated with the front end face of the slide bearing 4, for ejecting the slide bearing 4 through the through hole 20. The through holes 20 not only solve the problem of fixing the impeller 5 and the inner magnetic rotor 6, but also facilitate the disassembly of the sliding bearing 4, and the sliding bearing 4 can be ejected out through the through holes 20 by only using an ejection piece thinner than the fastener 19 during the disassembly.

Further, two or more fasteners 19 are provided, the connection holes between the impeller 5 and the inner magnetic rotor 6 and the fasteners 19 are through holes 20, and all the through holes 20 can be communicated with the front end face of the sliding bearing 4. This arrangement enables the slide bearing 4 to be ejected from various angles, making ejection of the slide bearing 4 more convenient.

Example 2:

As shown in fig. 2 and 3, the present embodiment provides a magnetic pump, which includes a pump body 1, a suspension body 2, and a pump shaft 3, wherein the pump body 1 is fixedly connected with the suspension body 2, the pump shaft 3 is horizontally fixed in a cavity formed by the pump body 1 and the suspension body 2, and the pump shaft 3 is provided with a connection structure of a sliding bearing and a rotating body in embodiment 1.

The front end of the inner magnetic rotor 6 of the magnetic pump is arranged to extend into the impeller 5, the sliding bearing 4 is directly arranged in the inner magnetic rotor 6, a rotating sleeve is not required to be additionally arranged at the tail part of the impeller 5 to install the sliding bearing 4, and the overall radial size is reduced after the installation, so that the magnetic pump is compact in structure; the gravity center of the rotating body is overlapped with the gravity center of the sliding bearing 4, so that the rotating body can stably and reliably run, and the service life of the sliding bearing 4 is prolonged; the magnetic pump adopts a structure that the pump shaft is not moved, and thrust rings on two sides of the sliding bearing 4 can be omitted, so that abrasion of the sliding bearing 4 and the thrust rings is avoided, and the axial length is reduced.

Further, the pump further comprises a spacer sleeve 7, the spacer sleeve 7 is fixed in a cavity formed by the pump body 1 and the suspension body 2 and divides the cavity into a front cavity 8 and a rear cavity 9, the pump shaft 3 is horizontally fixed in the front cavity 8, one end of the pump shaft 3 is inserted into the pump body 1 and is sleeved and fixed through a second O-shaped ring 10 embedded in the pump body 1, and the other end of the pump shaft 3 is inserted into the spacer sleeve 7 and is sleeved and fixed through a third O-shaped ring 11 embedded in the spacer sleeve 7. One end of the pump shaft 3 is fixed on the isolation sleeve 7, and the other end is directly fixed on the pump body 1, so that an intermediate connecting part is not needed, and the structure is simplified; the O-shaped ring is adopted for fixing, the axial fixing and the radial rotation prevention of the pump shaft 3 are realized by the compression of the O-shaped ring, the O-shaped ring is convenient to process and install and good in coaxiality, and the damage caused by the reverse rotation of the magnetic pump can be effectively prevented; in addition, the O-shaped ring can buffer impact generated in the running process, and the use safety is higher.

Further, a first groove 21 matched with a corresponding insertion end of the pump shaft 3 is arranged in the pump body 1, and a second O-ring groove 16 for installing the second O-ring 10 is arranged on the inner side wall of the first groove 21. The first groove 21 is arranged at one end of the pump shaft 3, the processing is simple, and the second O-shaped ring groove 16 is arranged on the first groove 21, so that the second O-shaped ring 10 is convenient and reliable to install and has a more compact structure.

Further, a second groove 22 matched with the corresponding insertion end of the pump shaft 3 is formed in the isolation sleeve 7, and a third O-ring groove 17 for installing a third O-ring 11 is formed in the inner side wall of the second groove 22. The second groove 22 is arranged to facilitate the insertion of the other end of the pump shaft 3, the processing is simple, and the third O-shaped ring groove 17 is arranged on the second groove 22, so that the third O-shaped ring 11 is convenient and reliable to install and has a more compact structure.

Further, the pump body 1 includes a front pump cover 12, a rear pump cover 13, and a connection housing 14 detachably connected between the front pump cover 12 and the rear pump cover 13, and one end of the pump shaft 3 is inserted into the front pump cover 12 of the pump body 1. The pump body 1 is split into a front pump cover 12, a rear pump cover 13 and a connecting shell 14 which are detachably connected, so that the pump shaft 3, the impeller 5, the inner magnetic rotor 6, the sliding bearing 4 and other components can be conveniently installed.

Further, the surface finish of the inner hole of the sliding bearing 4 is Ra0.02-Ra0.04, and the surface finish of the pump shaft 3 is Ra0.1-0.14. The arrangement can enable the friction force between the sliding bearing 4 and the pump shaft 3 to be far smaller than the resistance generated by compression of the pump shaft 3 on the O-shaped ring, so that smooth rotation between the inner ring of the sliding bearing 4 and the pump shaft 3 can be ensured, and reliable fixation of the pump shaft 3 can be ensured.

Claims (8)

1. The utility model provides a connection structure of slide bearing and rotor, includes rotor and slide bearing (4) that set up on pump shaft (3), the rotor includes impeller (5) and interior magnetic rotor (6), its characterized in that: the inner magnetic rotor (6) is arranged at the rear side of the impeller (5) and is coaxially arranged on the pump shaft (3), the front end of the inner magnetic rotor (6) stretches into the impeller (5) and is fixedly connected with the impeller (5), the sliding bearing (4) is coaxially sleeved between the pump shaft (3) and the inner magnetic rotor (6), and the gravity center of the rotator is coincident with that of the sliding bearing (4); the weight of the inner magnetic rotor (6) is matched with that of the impeller (5) so that the gravity center of the rotating body is exactly positioned on the axle center of the rotating body, and the sliding bearing (4) is arranged in the middle of the rotating body.

2. The structure for connecting a slide bearing to a rotating body according to claim 1, wherein: the outer ring of the sliding bearing (4) and the inner magnetic rotor (6) synchronously rotate, the inner ring is rotationally connected with the pump shaft (3), and at least one first O-shaped ring (15) which is in press fit with the outer ring of the sliding bearing (4) is embedded on the inner side wall of the inner magnetic rotor (6) and is used for axially fixing the outer ring of the sliding bearing (4) and preventing radial rotation so as to drive the outer ring of the sliding bearing (4) to synchronously rotate with the inner magnetic rotor (6).

3. The structure for connecting a slide bearing to a rotating body according to claim 2, wherein: the inner side wall of the inner magnetic rotor (6) is provided with a first O-shaped ring groove (18) for installing a first O-shaped ring (15).

4. The structure for connecting a slide bearing to a rotating body according to claim 1, wherein: the front end of the impeller (5) is provided with at least one fastener (19) for connecting the front end of the impeller (5) and the front end of the inner magnetic rotor (6).

5. The structure for connecting a slide bearing to a rotating body according to claim 4, wherein: at least one through hole (20) which is arranged to be communicated with the front end surface of the sliding bearing (4) is arranged in the connecting holes of the impeller (5) and the inner magnetic rotor (6) and the fastening piece (19), and the through hole (20) is used for ejecting the sliding bearing (4).

6. The utility model provides a magnetic drive pump, includes pump body (1), suspension body (2) and pump shaft (3), pump body (1) and suspension body (2) fixed connection, pump shaft (3) level is fixed in the cavity that pump body (1) and suspension body (2) formed, its characterized in that: the pump shaft (3) is provided with a connecting structure of the sliding bearing and the rotating body according to any one of claims 1-5.

7. A magnetic pump according to claim 6, wherein: still include spacer sleeve (7), spacer sleeve (7) are fixed in the cavity that pump body (1) and suspension body (2) formed and divide into preceding cavity (8) and back cavity (9), pump shaft (3) level is fixed in preceding cavity (8), the one end of pump shaft (3) is inserted in pump body (1) to cup joint fixedly through inlay second O type circle (10) of establishing in pump body (1), the other end of pump shaft (3) is inserted in spacer sleeve (7) to cup joint fixedly through inlay third O type circle (11) of establishing in spacer sleeve (7).

8. A magnetic pump according to claim 7, wherein: the pump body (1) comprises a front pump cover (12), a rear pump cover (13) and a connecting shell (14) detachably connected between the front pump cover (12) and the rear pump cover (13), and one end of the pump shaft (3) is inserted into the front pump cover (12) of the pump body (1).