TWM527045U - Shaft-seal free magnetic-driven pump with cassette type bearing mechanism - Google Patents

Description

Shaftless magnetic drive pump with snap-on bearing mechanism

This creation is about pumping, which is used to convert a conventional shaft seal pump into a shaftless pump that can be easily adapted to conventional pumps without the need to completely replace the entire pump. In particular, a shaftless magnetic drive pump with a snap-on bearing mechanism.

The conventional pump mainly comprises a pump casing having a hollow space, and the pump casing comprises an input pipe and an output pipe communicating with the hollow space. An impeller is located in the hollow space, and one end of the impeller is connected to one end of a rotating shaft, and the other end of the rotating shaft passes out of the pump casing and is connected to a driving mechanism at the rear end. When the driving mechanism drives the rotating shaft to rotate, the driving mechanism drives the rotating shaft. The impeller rotates, thereby driving the liquid in the pump casing, and pushing liquid from the input pipe to the output pipe through the pump casing to achieve the purpose of conveying liquid.

However, the shaft of a conventional pump is usually covered with a shaft sealing mechanism to prevent liquid from leaking from the shaft of the pump casing. However, this method cannot prevent the liquid from leaking, and the liquid is leaked and the pump is internally pumped. Wear and failure to function properly, resulting in a reduction in overall system life and frequent replacement, thus increasing overall maintenance costs. In addition, the leaked liquid will also cause VOC (easy to swing The problem of pollution caused by organic compounds) causes greenhouse effect and environmental pollution, and its toxicity can also cause health injuries such as carcinogenesis. Or the unit price of the liquid in the pump is quite high, so once it leaks, it costs a lot of money to replace it. Although a double shaft sealing mechanism has been used to improve liquid leakage, it is still not completely effective in preventing liquid leakage problems.

Therefore, the present invention hopes to propose a new shaftless magnetic drive pump with a snap-on bearing mechanism to solve the defects of the prior art.

Therefore, the purpose of this creation is to solve the above-mentioned problems in the prior art. In this creation, a shaftless magnetic drive pump with a snap-type bearing mechanism is proposed for converting a conventional shaft seal pump into a shaftless seal. Pumping, which can be easily adapted to conventional pumps, does not require a complete replacement of the entire pump. In this case, the magnetic rotating mechanism is used to drive the inner rotating shaft of the pump internal impeller, so the inner rotating shaft does not need to extend to the driving mechanism at the rear end, and can be completely sealed in a spacer connected to the pump, so that the conventional shaft seal is not required. The mechanism extends the inner shaft out of the spacer, and the whole can effectively prevent the liquid from leaking out. Furthermore, the integrated member of the entire inner shaft and the magnetic rotating mechanism in this case can be adapted to the conventional pumping, so that only the shaft-related components of the conventional pump need to be removed, and the inner rotating shaft and the magnetic rotating mechanism of the present case can be replaced. There is no need to replace the drive mechanism of the rear end of the conventional pump shaft, so the overall structure of the case can be easily adapted to the conventional pump, and the entire set of pumps need not be completely replaced, thereby greatly reducing the overall construction cost. The case The shaftless seal design can extend the service life of the entire pump; in addition, the bearing mechanism for covering the inner shaft in this case is detachable, easy to replace and repair, so when the bearing mechanism is damaged, only the bearing needs to be The mechanism can be removed and replaced, so the overall maintenance cost and maintenance time can be greatly reduced. Furthermore, in this case, the gap between the impeller and the inner wall of the pump casing can be adjusted by adjusting the gap between the bearing mechanism and the cover plate; this is not possible in the prior art.

In order to achieve the above object, a shaftless magnetic drive pump with a snap-type bearing mechanism is proposed in the present invention for converting a shaft seal pump into a shaftless seal pump, which can be easily adapted to the shaft seal pump. There is no need to completely replace the entire set of shaft seal pumps; the shaftless seal magnetic drive pump with the snap-on bearing mechanism is connected to a pump casing to be installed for driving the pump tube connected to the pump casing a liquid in the road; the pump casing has a hollow space and an opening is formed at the right end; the shaftless magnetic drive pump of the cartridge type bearing mechanism comprises: an impeller disposed in the pump casing for driving the pump casing connection a liquid in the conveying pipe; a cover plate is installed at the right end of the pump casing to close it; a perforation is formed in the center of the cover plate; an inner rotating shaft is approximately cylindrical, the left end is connected to the impeller, and the right end is connected to the impeller Extending from the opening of the cover plate; rotating the impeller when the inner rotating shaft rotates; a bearing mechanism is approximately tubular, covering the outer side of the inner rotating shaft, and the bearing mechanism is detachably connected to the Cover plate; a magnetic rotating mechanism, package An inner rotor and an outer rotor surrounding the outer side of the inner rotor, the inner rotor and the outer rotor having magnetic properties; wherein the inner rotor is coupled to the inner rotating shaft and does not contact the bearing mechanism, the outer rotor connecting the rear end drive mechanism and not contacting the Inner rotor; when the drive When the outer rotor rotates, the outer rotor applies a magnetic force to drive the inner rotor to rotate, and the inner rotating shaft and the impeller rotate to push the liquid in the pump casing; a spacer has a hollow space, and the cover is connected The outer side of the plate is coated to seal the inner rotor, the inner rotating shaft and the bearing mechanism, so that the inner rotor, the inner rotating shaft and the bearing mechanism can be separated from the outer rotor; wherein the insulating cover does not contact the inner rotor, The inner shaft and the bearing mechanism; therefore, the flow of liquid inside the pump casing can be confined within the cage without leaking into the outer rotor.

The features of the present invention and its advantages can be further understood from the description below, and please refer to the attached drawings when reading.

2‧‧‧ pump casing

3‧‧‧Input tube

4‧‧‧Output tube

5‧‧‧ drive mechanism

10‧‧‧ Impeller

20‧‧‧ Cover

21‧‧‧Perforation

22‧‧‧ annular washer

30‧‧‧Inner shaft

40‧‧‧ bearing mechanism

41‧‧‧Inner shaft

42‧‧‧Outer shaft

43‧‧‧ collar

50‧‧‧Magnetic rotating mechanism

51‧‧‧ Inner rotor

52‧‧‧Outer rotor

60‧‧‧Isolation cover

61‧‧‧ openings

70‧‧‧Base

71‧‧‧Axis hole

72‧‧‧ external shaft

73‧‧‧ hollow structure

80‧‧‧Connected space

90‧‧‧Circular perforation

410‧‧‧ annular protrusion

411‧‧‧Inner sleeve

412‧‧‧ collar

413‧‧‧ bushings

414‧‧‧Expanded parts

415‧‧‧Aperture flange

420‧‧‧ annular depression

421‧‧‧ Left outer shaft

422‧‧‧right outer shaft

423‧‧‧ casing

424‧‧‧ trench

425‧‧‧Second trench

511‧‧‧ inner magnet

512‧‧‧ openings

521‧‧‧External magnet

522‧‧‧ openings

Figure 1 shows a perspective view of the component combination of the present case.

Figure 2 shows a perspective view of the component combination of the present invention connected to a pump casing.

Figure 3 shows a cross-sectional view of the component combination of Figure 2.

Figure 4 shows an exploded view of the main components of Figure 2.

Figure 5 shows a perspective view of the bearing mechanism of the present case.

Figure 6 shows an exploded view of the bearing mechanism of the present case.

Figure 7 shows a cross-sectional view of the inner cylinder of the case.

Figure 8 shows a cross-sectional view of the shaft barrel outside the present case.

Figure 9 shows a cross-sectional view of the bearing mechanism of the present case.

Figure 10 shows a schematic diagram of the application of the present case.

In view of the structural composition of the case, and the functions and advantages that can be produced, in conjunction with the drawings, a preferred embodiment of the present invention is described in detail below.

Referring to FIG. 1 to FIG. 10, the shaftless magnetic drive pump of the card bearing type bearing mechanism of the present invention is connected to a pump casing 2 to be mounted for driving the pump casing 2 The liquid in the connected conveying pipe; the pump casing 2 includes an input pipe 3 and an output pipe 4, and has a hollow space connecting the input pipe 3 and the output pipe 4. The right end of the pump casing 2 forms an opening. The shaftless magnetic drive pump with the cartridge type bearing mechanism comprises the following components: an impeller 10 disposed in the pump casing 2 for driving the liquid in the delivery line to which the pump casing 2 is connected.

A cover plate 20 is attached to the opening at the right end of the pump casing 2 to close it. A through hole 21 is formed in the center of the cover plate 20. Preferably, the connection of the cover plate 20 to the pump casing 2 is interfaced via an annular gasket 22.

An inner shaft 30 has a substantially cylindrical structure with a left end connected to the impeller 10 and a right end extending from the opening of the cover plate 20. When the inner rotating shaft 30 rotates, the impeller 10 can be rotated.

A bearing mechanism 40 is approximately tubular in shape and is wrapped around the outer shaft 30. The bearing mechanism 40 removably connects the cover plate 20. As shown in FIG. 5, the bearing mechanism 40 includes an inner shaft cylinder 41 and an outer shaft cylinder 42 that covers the inner shaft cylinder 41. The inner shaft cylinder 41 is covered and fixed to the inner rotating shaft 30, and the inner shaft cylinder 41 is rotatable relative to the outer shaft cylinder 42; one end of the outer shaft cylinder 42 is fixed to one of the cover plates 20 side. Therefore, when the inner rotating shaft 30 rotates, The inner shaft cylinder 41 is rotated, and the outer shaft cylinder 42 is not rotated.

A magnetic rotating mechanism 50 includes an inner rotor 51 and an outer rotor 52 surrounding the outer side of the inner rotor 51. The inner rotor 51 and the outer rotor 52 have magnetic properties. The inner rotor 51 is connected to the inner rotating shaft 30 and does not contact the bearing mechanism 40. The outer rotor 52 is connected to the original driving mechanism 5 at the rear end and does not contact the inner rotor 51. Generally, the drive mechanism 5 is a motor.

When the driving mechanism 5 drives the outer rotor 52 to rotate, the outer rotor 52 applies the magnetic force to drive the inner rotor 51 to rotate, and the inner rotating shaft 30 and the impeller 10 are rotated to push the liquid in the pump casing 2, Liquid is delivered from the inlet pipe 3 to the outlet pipe 4.

A spacer cover 60 has a hollow space, and is connected to the outer side of the cover plate 20 to cover and seal the inner rotor 51, the inner rotating shaft 30 and the bearing mechanism 40, so that the inner rotor 51, the inner rotating shaft 30 and the bearing mechanism 40 can be The outer rotor 52 is isolated from each other. The spacer 60 does not contact the inner rotor 51, the inner rotating shaft 30, and the bearing mechanism 40. Therefore, the flow of liquid inside the pump casing 2 can be confined within the cage 60 without leaking into the interior of the outer rotor 52.

The gap between the bearing mechanism 40 and the cover plate 20 is adjustable. Therefore, when the gap between the bearing plate 40 and the cover plate 20 is adjusted, the gap between the impeller 10 and the inner wall of the pump casing 2 can be adjusted. .

Through the above structure, when the magnetic rotating mechanism 50 drives the impeller 10 to push liquid, the liquid can be confined in the isolation cover 60 without leaking to the outer rotor 52 and the driving mechanism 5; When there is no need to replace the original There is a pump casing 2 and an associated conveying pipe, and the rotation speed of the magnetic rotating mechanism 50 is the same as that of the original driving mechanism 5, so that the same driving force can be maintained, so there is no need to replace the driving. Institution 5, so the overall cost of construction is quite low. Furthermore, the bearing mechanism 40 is detachable. Therefore, when the bearing mechanism 40 is damaged, the bearing mechanism 40 only needs to be detached and replaced, so that the overall maintenance cost and maintenance time can be greatly reduced.

A base 70 is coupled to the pump casing 2 for enclosing the outer rotor 52 and the cage 60. The base 70 is adjacent to the side of the cover plate 20 to form a concave hollow structure 73 for covering the outer rotor 52 and the spacer 60. A gap is formed between the inner side wall of the hollow structure 73 and the outer side wall of the outer rotor 52, and thus does not directly contact the outer rotor 52. A side of the base 70 away from the cover plate 20 forms a hollow structure 73 through which the shaft hole 71 communicates with the base 70. The base 70 can be comprised of a single or multiple different components.

The outer rotor 52 is connected to the driving mechanism 5 via an outer rotating shaft 72. The outer rotating shaft 72 is mounted in the base 70, one end of which is connected to the outer rotor 52, and the other end is connected to the shaft hole 71 of the base 70. The driving mechanism 5 is connected to extend outside the base 70.

The spacer 60 has a hollow space, and has a tubular structure. The left end of the spacer 60 has an opening 61. The left end of the spacer 60 is connected to the cover 20 and covers the inner rotor 51, the inner shaft 30 and the outer side of the bearing mechanism 40. The spacer 60 is made of a material having high chemical resistance and high electrical resistivity.

The inner shaft cylinder 41 and the outer shaft cylinder 42 are nested in a fitting manner so that the inner shaft cylinder 41 does not move axially relative to the outer shaft cylinder 42 and the shaft of the inner shaft 30 can be fixed. To the position, the purpose of axial positioning is achieved. Therefore, it is possible to avoid the case where the inner shaft 30 is moved in the axial direction during rotation so that the axial position of the impeller 10 to which it is connected is changed to cause the entire pump to malfunction.

As shown in FIG. 9, the middle portion of the outer surface of the inner shaft cylinder 41 forms an annular protruding portion 410, and the inner side wall surface of the outer shaft cylinder 42 forms a concave annular recess portion 420, and the annular protruding portion 410 and the ring The recessed portions 420 are fitted to each other. The left and right sides of the annular protruding portion 410 abut against the left and right sides of the annular recessed portion 420 , and a gap is formed between the outer wall surface of the annular protruding portion 410 and the inner wall surface of the annular recessed portion 420 .

As shown in FIG. 7 , the inner shaft cylinder 41 is a tubular structure having a hollow space, and includes an inner sleeve 411 , a collar 412 covering the outer side of the inner sleeve 411 , and two sleeves 413 . The right end of the inner sleeve 411 forms an enlarged portion 414. The right end of the inner rotating shaft 30 forms an enlarged portion 31. In the mounted state, the inner rotating shaft 30 is connected to the enlarged portion 31 of the inner sleeve 411 by using the enlarged portion 414 thereof. Wherein the collar 412 has an annular structure covering the middle portion of the outer surface of the inner sleeve 411. The two sleeves 413 are respectively connected to the left and right sides of the collar 412, and the two sleeves 413 are adjacent to the collar 412 to form an enlarged annular flange 415, wherein the annular flange 415 of the sleeves 413 The outer diameter is approximately equal to the outer diameter of the collar 412, so the annular flange 415 of the two sleeves 413 and the collar 412 The annular projection 410 is formed.

As shown in FIG. 8, the outer shaft cylinder 42 is a tubular structure having a hollow space, and includes a left outer shaft cylinder 421 on the left outer side, a right outer shaft cylinder 422 on the right outer side, and two sleeves on the inner side. 423. The left outer shaft tube 421 and the right outer shaft tube 422 form an opening, and the left outer shaft tube 421 is connected to the right outer shaft tube 422. The two sleeves 423 have an annular structure, respectively located on the left side. The annular recessed portion 420 is formed between the two sleeves 423 in the outer shaft cylinder 421 and the right outer shaft cylinder 422.

Preferably, the inner side wall surfaces of the two sleeves 423 form a plurality of grooves 424 arranged in an annular shape, and the plurality of grooves 424 are approximately parallel to the axial direction of the outer shaft cylinder 42. The two sleeves 423 further form a plurality of second grooves 425 extending from the axial direction of the two sleeves 423 to communicate with the plurality of grooves 424.

Preferably, the two sleeves 413 and the two sleeves 423 are made of a ceramic material.

Preferably, the bearing mechanism 40 is connected to the cover plate 20, and a ring 43 is disposed. The collar 43 surrounds the impeller 10 and the inner shaft cylinder 41 near the through hole 21 of the cover plate 20, thereby reducing the The impeller 10 and the inner shaft cylinder 41 wear the perforation 21 when rotated, and can limit the return flow of the liquid in the pump casing 2.

The inner rotor 51 has an annular side wall, and the right end of the inner rotating shaft 30 is connected to the inner rotor 51. The inner rotor 51 includes a plurality of inner magnets 511 which are circumferentially arranged along the outer wall surface of the inner rotor 51 so that the magnetic poles are interlaced. Preferably, the inner rotor 51 has a hollow space, and the left end thereof has an opening 512, and the inner side wall surface of the inner rotor 51 surrounds the bearing mechanism. 40, and there is a gap between the inner side wall of the inner rotor 51 and the outer side wall of the bearing mechanism 40, so the inner rotor 51 does not directly contact the bearing mechanism 40. The right end of the inner rotating shaft 30 is connected to the inner side of the right end of the inner rotor 51.

Wherein the outer rotor 52 is a tubular structure having a hollow space, the left end of which forms an opening 522, the inner side wall surface of the outer rotor 52 surrounds the inner rotor 51, and the inner side wall of the outer rotor 52 and the outer side wall of the inner rotor 51 There is a gap between them, so the outer rotor 52 does not directly contact the inner rotor 51. The outer rotor 52 includes a plurality of outer magnets 521 which are circumferentially arranged along the inner wall surface of the outer rotor 52 such that the magnetic poles are interlaced.

The gap between the spacer 60 and the inner rotor 51, the gap between the spacer 60 and the bearing mechanism 40, and the gap between the inner rotor 51 and the bearing mechanism 40 are interconnected to form a communication. Space 80.

A plurality of circulating through holes 90 are formed in the cover plate 20 near the periphery of the impeller 10, and the circulating through holes 90 extend through the cover plate 20 to communicate with the communication space 80.

In operation, the liquid in the pump casing 2 can flow into the communication space 80 via the circulating perforation 90 and then be guided back into the pump casing 2 via the perforation 21 of the cover plate 20, the purpose of which is The isolation cover 60 is provided with heat dissipation, and the internal heat dissipation and lubrication effect of the bearing mechanism 40 is provided. The liquid may flow into the bearing mechanism 40 between the inner rotor 51 and the bearing mechanism 40, or may flow from the inner rotor 51 and the bearing mechanism 40 through the through hole 91 formed at the right end of the inner rotor 51. The reflow is performed between the 60 and the inner rotor 51.

This case is used to convert the traditional shaft seal pump into a shaftless seal pump, which can Easy to adapt to conventional pumps, there is no need to completely replace the entire pump. In this case, the magnetic rotating mechanism is used to drive the inner rotating shaft of the pump internal impeller, so the inner rotating shaft does not need to extend to the driving mechanism at the rear end, and can be completely sealed in a spacer connected to the pump, so that the conventional shaft seal is not required. The mechanism extends the inner shaft out of the spacer, and the whole can effectively prevent the liquid from leaking out. Furthermore, the integrated member of the entire inner shaft and the magnetic rotating mechanism in this case can be adapted to the conventional pumping, so that only the shaft-related components of the conventional pump need to be removed, and the inner rotating shaft and the magnetic rotating mechanism of the present case can be replaced. There is no need to replace the drive mechanism of the rear end of the conventional pump shaft, so the overall structure of the case can be easily adapted to the conventional pump, and the entire set of pumps need not be completely replaced, thereby greatly reducing the overall construction cost. The shaftless seal design of the case can extend the service life of the whole pump; in addition, the bearing mechanism for covering the inner shaft in this case is detachable, easy to replace and repair, so when the bearing mechanism is damaged, only need to The bearing mechanism can be removed and replaced, so that the overall maintenance cost and maintenance time can be greatly reduced. Furthermore, in this case, the gap between the impeller and the inner wall of the pump casing can be adjusted by adjusting the gap between the bearing mechanism and the cover plate; this is not possible in the prior art.

In summary, the humanized design of this case is quite in line with actual needs. The specific improvement of the existing defects is obviously a breakthrough improvement advantage compared with the prior art, and it has an improvement in efficacy and is not easy to achieve. The case has not been disclosed or disclosed in domestic and foreign literature and market, and has complied with the provisions of the Patent Law.

The detailed description above is a detailed description of one of the possible embodiments of the present invention, and the embodiment is not intended to limit the scope of the patents, and the equivalent implementations or modifications that are not included in the spirit of the present invention should be included in The patent scope of this case.

10‧‧‧ Impeller

20‧‧‧ Cover

70‧‧‧Base

72‧‧‧ external shaft

Claims (17)

A shaftless magnetic drive pump with a cartridge type bearing mechanism is used for converting a shaft seal pump into a shaftless seal pump, which can be easily adapted to the shaft seal pump without the need to install the entire shaft seal pump The pump is completely replaced; the shaftless magnetic drive pump with the cartridge type bearing mechanism is connected to a pump casing to be installed to drive the liquid in the conveying pipe connected to the pump casing; The shaft has a hollow space and the right end forms an opening; the shaftless magnetic drive pump with the cartridge type bearing mechanism comprises: an impeller disposed in the pump casing for driving the liquid in the conveying pipeline connected by the pump casing; a cover plate is mounted on the right end of the pump casing to close it; a perforation is formed in the center of the cover plate; an inner rotation shaft is approximately cylindrical, the left end is connected to the impeller, and the right end is extended by the opening of the cover plate When the inner shaft rotates, the impeller can be rotated; a bearing mechanism is approximately tubular, covering the outer side of the inner shaft, and the bearing mechanism is detachably connected to the cover; a magnetic rotating mechanism Including an inner rotor and surrounding the inner rotor The outer rotor, the inner rotor and the outer rotor have magnetic properties; wherein the inner rotor is coupled to the inner rotating shaft and does not contact the bearing mechanism, the outer rotor is coupled to the rear end drive mechanism and does not contact the inner rotor; when the driving mechanism drives the When the outer rotor rotates, the outer rotor applies a magnetic force to drive the inner rotor to rotate, and the inner rotating shaft and the impeller rotate. And pushing the liquid in the pump casing; a spacer has a hollow space connecting the outer side of the cover, sealing and sealing the inner rotor, the inner rotating shaft and the bearing mechanism, so that the inner rotor, the inner rotating shaft and the bearing mechanism The outer rotor can be isolated from the outer rotor; wherein the spacer does not contact the inner rotor, the inner shaft and the bearing mechanism; therefore, the liquid flow inside the pump casing can be confined in the cage without leaking to the The inside of the outer rotor. A shaftless magnetic drive pump having a cartridge type bearing mechanism according to claim 1, wherein the bearing mechanism comprises an inner shaft barrel and an outer shaft barrel covering the inner shaft barrel; wherein the inner shaft barrel Covering and fixing to the inner rotating shaft, and the inner shaft cylinder is rotatable relative to the outer shaft cylinder; one end of the outer shaft cylinder is fixed to one side of the cover plate; therefore, when the inner rotating shaft rotates, The inner shaft cylinder is driven to rotate, and the outer shaft cylinder is not rotated; the bearing mechanism is detachable, so when the bearing mechanism is damaged, the bearing mechanism only needs to be removed and replaced. For example, the shaftless magnetic drive pump with the card type bearing mechanism of claim 1 is adjustable, wherein the gap between the bearing mechanism and the cover plate is adjustable, so adjusting the bearing mechanism to connect between the cover plates When the gap is small, the gap between the impeller and the inner wall of the pump casing can be adjusted. A shaftless magnetic drive pump having a cartridge type bearing mechanism according to claim 1, wherein the connection of the cover plate to the pump casing is via an annular gasket. A shaftless seal with a snap-on bearing mechanism as claimed in claim 1 The magnetic drive pump further includes a base connected to the pump casing for covering the outer rotor and the isolation cover; the base is adjacent to the side of the cover plate to form a concave hollow structure for covering the outer a rotor and the spacer; wherein a gap is formed between an inner sidewall of the hollow structure and an outer sidewall of the outer rotor, so that the outer rotor is not directly contacted; a side of the base away from the cover forms a shaft hole communicating with the base Hollow structure; the base is composed of a single or a plurality of different components; wherein the outer rotor is connected to the driving mechanism via an outer rotating shaft, the outer rotating shaft is installed in the base, one end of which is connected to the outer rotor, and the other end is connected The drive mechanism is connected by extending the shaft hole of the base out of the base. The shaftless magnetic drive pump of the cartridge type bearing mechanism of claim 1, wherein the spacer has a tubular structure, and an opening is formed at a left end thereof, and the left end of the spacer is connected to the cover, and is covered by the cover The inner rotor, the inner rotating shaft and the outer side of the bearing mechanism. The shaftless magnetic drive pump of the cartridge type bearing mechanism of claim 2, wherein the inner shaft cylinder and the outer shaft cylinder are nested in a fitting manner so that the inner shaft cylinder does not oppose The outer shaft cylinder is axially moved, and the axial position of the inner rotating shaft can be fixed to achieve the purpose of axial positioning; wherein the inner portion of the outer surface of the inner shaft cylinder forms an annular protruding portion, and the inner side wall surface of the outer shaft cylinder is formed a concave annular recessed portion, the annular protruding portion and the annular recessed portion are fitted to each other; wherein the left and right sides of the annular protruding portion abut against the left and right sides of the annular recessed portion, the ring An outer wall surface of the protruding portion and an inner side wall of the annular recess A gap is formed between the faces. A shaftless magnetic drive pump having a card type bearing mechanism according to the seventh aspect of the patent application, wherein the inner shaft cylinder is a tubular structure having a hollow space, and includes an inner sleeve covering the outer side of the inner sleeve a shaft ring and two sleeves; wherein the right end of the inner sleeve forms an enlarged portion, wherein the right end of the inner shaft forms an enlarged portion, and in the mounted state, the inner shaft is coupled to the enlarged portion of the inner sleeve by using an enlarged portion thereof; wherein the shaft The ring has an annular structure covering the middle portion of the outer surface of the inner sleeve; the two sleeves are respectively connected to the left and right sides of the collar, and the two sleeves are adjacent to the collar to form an enlarged annular flange The outer diameter of the annular flange of the two sleeves is approximately equal to the outer diameter of the collar, so that the annular flange of the two sleeves forms the annular protrusion with the collar. A shaftless magnetic drive pump having a cartridge type bearing mechanism according to claim 7 wherein the outer shaft cylinder is a tubular structure having a hollow space, and includes a left outer shaft cylinder on the left outer side, located on the right outer side a right outer shaft tube and two sleeves on the inner side; wherein the left outer shaft tube and the right outer shaft tube form an opening at both left and right ends, and the left outer shaft tube connects the right outer shaft tube, the two sets The tube has an annular structure, which is respectively located in the left outer shaft cylinder and the right outer shaft cylinder, and the annular recessed portion is formed between the two sleeves. The shaftless magnetic drive pump of the card type bearing mechanism of claim 9 wherein the inner side wall faces of the two sleeves form a plurality of annularly arranged grooves, the plurality of grooves being approximately parallel to the outer The axial direction of the barrel; wherein the two sleeves further form a plurality of second grooves, which are connected by the axial extension of the two sleeves The plurality of grooves. A shaftless magnetic drive pump having a card type bearing mechanism according to claim 9 of the patent application, wherein the two bushings and the two bushings are made of a ceramic material. For example, the shaftless magnetic drive pump of the cartridge type bearing mechanism of claim 2, wherein the bearing mechanism is connected to the cover plate is provided with a ring, the collar surrounds the impeller and the inner shaft cylinder Adjacent to the perforation of the cover plate, the wear of the impeller and the inner shaft barrel when the inner shaft barrel is rotated can be reduced, and the return flow of the liquid in the pump casing can be restricted. A shaftless magnetic drive pump having a cartridge type bearing mechanism according to claim 1, wherein the inner rotor has an annular side wall, and a right end of the inner rotating shaft is coupled to the inner rotor; the inner rotor includes a plurality of inner rotors A magnet, the plurality of inner magnets are circumferentially arranged along the outer wall surface of the inner rotor with the magnetic poles interdigitated. A shaftless magnetic drive pump having a cartridge type bearing mechanism according to claim 13 wherein the inner rotor has a hollow space, and an opening is formed at a left end thereof, the inner side wall surface of the inner rotor surrounding the bearing mechanism, and There is a gap between the inner side wall of the inner rotor and the outer side wall of the bearing mechanism, so that the inner rotor does not directly contact the bearing mechanism; wherein the right end of the inner rotating shaft is connected to the inner side of the right end of the inner rotor. A shaftless magnetic drive pump having a card type bearing mechanism according to claim 1, wherein the outer rotor is a tubular structure having a hollow space, and an opening is formed at a left end thereof, and an inner wall surface of the outer rotor surrounds the outer rotor An inner rotor having a gap between an inner side wall of the outer rotor and an outer side wall of the inner rotor, thus The outer rotor does not directly contact the inner rotor; the outer rotor includes a plurality of outer magnets that are circumferentially arranged along the inner wall surface of the outer rotor with the magnetic poles interdigitated. A shaftless magnetic drive pump having a cartridge type bearing mechanism according to claim 1, wherein a gap between the spacer and the inner rotor, a gap between the spacer and the bearing mechanism, and a gap between the inner rotor and the bearing mechanism is connected to each other to form a communication space; wherein a plurality of circulating perforations are formed on the cover plate near the periphery of the impeller, and the circulating perforations extend through the cover plate to communicate with the communication space; In operation, the liquid in the pump casing can flow into the communication space through the circulating perforation, and then is guided back into the pump casing through the perforation of the cover plate, and the purpose is to provide heat dissipation of the isolation cover. And provide internal heat dissipation and lubrication of the bearing mechanism. For example, the shaftless magnetic drive pump having the card type bearing mechanism of the first application of the patent scope is composed of a material having high chemical resistance and high electrical resistivity.