CN118572958A - Shaftless magnetic drive pump - Google Patents

Abstract

The present invention provides a shaftless magnetic pump, belonging to the field of pump technology. It solves the technical problems of the existing shaftless magnetic pump rotor assembly support and radial shaking. The shaftless magnetic pump includes a shell with an inlet and an outlet, a stator assembly and an integrally formed rotor assembly that rotates relative to the stator assembly are installed in the shell, the stator assembly includes a stator shielding sleeve and a stator body, the stator shielding sleeve has a closed annular accommodating cavity and a concave cavity, the stator body is located in the accommodating cavity, the rotor assembly is located in the concave cavity, the rotor assembly includes a rotor shielding sleeve and a rotor body, the rotor shielding sleeve has a through hole 1 in the middle, the rotor body is arranged around the through hole 1, and the stator shielding sleeve and the rotor shielding sleeve are fixedly provided with a rotating assembly 1 and a rotating assembly 2 at the position between the stator body and the rotor body. The present invention can better support the rotor assembly to reduce its radial shaking, and can more stably rotate relative to the stator assembly.

Description

A shaftless magnetic pump

Technical Field

The invention belongs to the technical field of pumps, and in particular relates to a shaftless magnetic pump.

Background Art

The magnetic pump drives the pump rotor through the magnetic force between a static magnet and a rotating magnet to achieve the pump's operation. Compared with traditional mechanical seal pumps, magnetic pumps do not require the use of dynamic seals, thus avoiding the leakage and wear of mechanical seals, and have higher reliability and longer service life.

At present, the improved structure of the magnetic drive pump with patent number 201510156259X discloses a fixed shaft structure with bilateral support; such a fixed shaft structure must have a support on the pump head, that is, the support frame in the patent. Since the volume of the permanent magnetic canned pump is small, the flow channel space of the pump head is limited. After the support frame is set, the flow channel of the pump head will be affected. In addition, the fixed shaft is relatively slender. The more rotating parts there are, the larger the shaking gap is. Therefore, radial shaking is likely to occur during the high-speed rotation of the inner rotor, which may cause breakage and affect the normal operation of the magnetic pump.

Another example is the shaftless magnetic pump with patent number 2023201200175. The application discloses that the front end of the impeller of the magnetic pump is rotatably connected to the pump body through a first sliding bearing assembly, and the rear end of the impeller is rotatably connected to the pump cover installed at the rear end of the pump body through a second sliding bearing assembly. A connecting sleeve is fixedly connected to the rear end of the impeller, and the inner magnetic steel is fixedly connected to the connecting sleeve. The application also discloses an isolation sleeve assembly, which is fixedly buckled at the rear end of the pump cover. Both the connecting sleeve and the inner magnetic steel are located in the inner cavity of the isolation sleeve assembly. The outer magnetic steel is located on the outside of the isolation sleeve assembly and is arranged corresponding to the position of the inner magnetic steel. In this way, a magnetic pump with an inner magnetic steel rotating without a rotating shaft support is formed. However, the gap between the inner magnet and the outer magnet is relatively small. The front end of the connecting sleeve and the rear end of the impeller fixed support are suspended and embedded in the inner cavity of the isolation sleeve assembly. After power is turned on, the rotation of the inner magnet drives the impeller to rotate. The impeller is supported by the bearing for rotation, but the inner magnet will have radial shaking when rotating at high speed, resulting in instability of the central axis of the inner magnet, affecting the operation of the magnetic pump.

Another example is the idling-resistant plastic magnetic pump with patent number 2007100744878, which discloses that the outer wall of the front end of the disc-shaped impeller driven magnet set and the inner wall of the inlet end of the front pump shell are respectively fixedly installed with the inner ring and outer ring of the fully sealed ceramic rolling bearing, and the inner wall of the bottom groove of the disc-shaped impeller driven magnet set and the cylindrical outer wall of the inner bottom protrusion of the rear shell are respectively fixedly installed with the inner ring and outer ring of the fully sealed ceramic rolling bearing. Or the inner hole wall of the disc-shaped impeller driven magnet set and the outer wall of the guide column extending from the inlet of the front pump shell are respectively fixedly installed with the inner ring and outer ring of the fully sealed ceramic rolling bearing. The above schemes all adopt the inner wall of the disc-shaped impeller driven magnet set to be rotatably fixed on the shell, but the gap between the driven magnet and the main transmission magnet is relatively small, and the fully sealed ceramic rolling bearing also has a certain radial gap. When rotating at high speed, the driven magnet will have a certain radial runout, which affects the relative rotation of the driven magnet and the main transmission magnet, and affects the operation of the magnetic pump.

How to better support the rotor assembly to reduce radial shaking and enable it to rotate relative to the stator assembly more stably.

Summary of the invention

In view of the deficiencies in the prior art, an object of the present invention is to provide a shaftless magnetic pump.

The objectives of the present invention can be achieved through the following technical solutions: a shaftless magnetic pump, comprising a shell, a stator assembly and an integrally formed rotor assembly rotating relative to the stator assembly installed in the shell, the stator assembly comprising a stator shielding sleeve and a stator body, the stator shielding sleeve having a closed annular accommodating cavity and a concave cavity, the stator body being located in the accommodating cavity, the rotor assembly being located in the concave cavity, the rotor assembly comprising a rotor shielding sleeve and a rotor body, the rotor shielding sleeve having a through hole one in the middle, the rotor body being arranged around the through hole one, the stator shielding sleeve and the rotor shielding sleeve being fixedly provided with a rotating assembly one and a rotating assembly two at a position located between the stator body and the rotor body.

Rotating assembly 1 and rotating assembly 2 are fixedly arranged at both ends of the part between the stator body and the rotor body through the stator shielding sleeve and the rotor shielding sleeve. Rotating assembly 1 and rotating assembly 2 can support the rotor assembly to rotate relative to the stator assembly, and can also fix the rotor assembly and the stator assembly in the radial direction to prevent radial shaking, making their rotation more stable.

In the above-mentioned shaftless magnetic pump, the accommodating cavity is arranged around the concave cavity, the stator shielding sleeve is formed with a first mounting groove at the upper part of the concave cavity, and a second mounting groove is formed at the lower part of the concave cavity, the inner circumferential diameter of the first mounting groove is larger than the inner circumferential diameter of the concave cavity and larger than the inner circumferential diameter of the second mounting groove, the upper part of the rotor shielding sleeve is indented inwardly relative to the position of the first mounting groove to form a third mounting groove, and the first mounting groove and the third mounting groove are fixedly provided with a rotating component 1, the lower part of the rotor shielding sleeve is indented inwardly relative to the position of the second mounting groove to form a fourth mounting groove, and the second mounting groove and the fourth mounting groove are fixedly provided with a rotating component 2.

The accommodating cavity is arranged around the concave cavity to form an inner rotor type shaftless magnetic pump in which the rotor assembly is located in the middle of the stator assembly. The rotating assembly 1 is fixedly installed in the first mounting groove and the third mounting groove, and the rotating assembly 2 is fixedly installed in the second mounting groove and the fourth mounting groove, so that the gap distance between the stator body and the rotor body can be reduced. The rotating assembly 1 and the rotating assembly 2 can support the rotation of the rotor assembly relative to the stator assembly, and can be fixed in the radial direction of the rotor assembly and the stator assembly to prevent radial shaking, so that the relative rotation of the rotor assembly and the stator assembly within a smaller gap distance is more stable, and the performance of the shaftless magnetic pump is better.

In the above-mentioned shaftless magnetic pump, the outer shell includes a pump shell and a motor shell that are detachably fixedly connected, the stator shielding sleeve is detachably fixedly connected between the pump shell and the motor shell, the stator shielding sleeve and the pump shell together form a pump chamber, the inlet, outlet and concave cavity are all connected to the pump chamber, the stator shielding sleeve and the motor shell together form a motor chamber, the pump chamber and the motor chamber are not connected to each other, and a gap passage is provided between the outer circumferential surface of the rotor shielding sleeve and the inner circumferential surface of the concave cavity, and the gap passage is connected to the pump chamber and the through hole.

The gap channel is the gap required when the rotor assembly rotates relative to the stator assembly, wherein the above-mentioned rotating assembly one and rotating assembly two can stably support the rotor assembly and the stator assembly to form the gap channel and maintain the stability of the spacing of the gap channel when the rotor assembly rotates. By setting the gap channel to be connected with the pump chamber and the through hole one, a flow channel can be formed, so that the liquid entering the pump chamber from the inlet can flow into the gap channel for cooling the stator body and the rotor body and can lubricate the rotating assembly one and the rotating assembly two.

In the above-mentioned shaftless magnetic pump, the rotating component includes a ceramic sleeve and a silicon carbide sleeve mounted outside the ceramic sleeve, the silicon carbide sleeve is fixed in the first mounting groove, the ceramic sleeve is fixed in the third mounting groove, a flow channel groove is provided on the inner circumference of the silicon carbide sleeve, the upper end of the flow channel groove is connected to the pump chamber and the lower end is connected to the gap channel, the outer circumference of the ceramic sleeve is in smooth sliding fit with the inner circumference of the silicon carbide sleeve.

The silicon carbide sleeve 1 and the first mounting groove are tightly fitted and fixed, the ceramic sleeve 1 and the third mounting groove are tightly fitted and fixed, the ceramic sleeve 1 does not contact the stator shielding sleeve, the silicon carbide sleeve 1 does not contact the rotor shielding sleeve, and the outer circumference of the ceramic sleeve 1 and the inner circumference of the silicon carbide sleeve 1 are smoothly slidably fitted, the tight fit and the smooth sliding fit make the spacing of the gap channel stable, and the liquid flowing through the pump cavity in the flow channel groove 1 can lubricate and cool the silicon carbide sleeve 1 and the ceramic sleeve 1, so that they can rotate better relative to each other.

In the above-mentioned shaftless magnetic pump, the rotating component 2 includes a ceramic sleeve 2 and a silicon carbide sleeve 2 sleeved outside the ceramic sleeve 2, the silicon carbide sleeve 2 is fixed in the second mounting groove, the ceramic sleeve 2 is fixed in the fourth mounting groove, the inner circumferential surface of the silicon carbide sleeve 2 is provided with a flow channel groove 2, the upper end surface of the silicon carbide sleeve 2 does not contact the rotor shielding sleeve, the outer circumferential surface of the ceramic sleeve 2 and the inner circumferential surface of the silicon carbide sleeve 2 are smoothly slidably matched, the rotating component 2 also includes a thrust plate 2, the lower end surface of the thrust plate 2 abuts against the bottom surface of the second mounting groove, the upper end surface abuts against the lower end surfaces of the ceramic sleeve 2 and the silicon carbide sleeve 2, the upper end surface of the thrust plate 2 is provided with a flow channel groove 3, the upper end of the flow channel groove 2 is connected to the gap channel, and the lower end is connected to the flow channel groove 3, the flow channel groove 3 is connected to the through hole 1, the lower end surface of the rotor shielding sleeve is higher than the upper end surface of the thrust plate 2, and the lower end surface of the ceramic sleeve 2 is smoothly slidably matched with the upper end surface of the thrust plate 2.

First, tighten the thrust plate 2 with the inner circumferential surface of the second mounting groove, and the lower end surface of the thrust plate 2 rests against the bottom surface of the second mounting groove. Then, the silicon carbide sleeve 2 is tightened and installed with the second mounting groove, and the ceramic sleeve 2 is tightened and installed with the fourth mounting groove. Neither the silicon carbide sleeve 2 nor the thrust plate 2 contacts the rotor shielding sleeve. The outer circumferential surface of the ceramic sleeve 2 is smoothly slidably matched with the inner circumferential surface of the silicon carbide sleeve 2, and the lower end surface of the ceramic sleeve 2 is smoothly slidably matched with the upper end surface of the thrust plate 2, so that the spacing of the gap channel is stable, and the liquid flowing through the pump cavity in the flow channel groove 2 and the flow channel groove 1 can lubricate and cool the silicon carbide sleeve 2, the ceramic sleeve 2 and the thrust plate 2, so that they can rotate better relative to each other.

In the above-mentioned shaftless magnetic pump, an impeller is fixedly connected to the upper part of the rotor assembly, and a thrust cam ring coaxial with the impeller protrudes upward from the impeller, and a thrust plate 1 is fixedly arranged at one end of the inlet close to the impeller, and the thrust plate 1 is arranged opposite to the thrust cam ring, and the lower end surface of the thrust plate 1 is higher than the upper end surface of the thrust cam ring.

Since the outer shell is a plastic part and the rotor shielding sleeve is also a plastic part, there is a certain deformation of the plastic parts. A thrust plate 1 is fixedly provided at the end of the inlet close to the impeller, and the lower end surface of the thrust plate 1 is higher than the upper end surface of the thrust cam. That is to say, a certain gap is left between the thrust plate 1 and the thrust cam to ensure better rotation of the impeller.

In the above-mentioned shaftless magnetic pump, the middle of the impeller has a through hole 2, and the through hole 1 is connected to the pump cavity through the through hole 2. The through hole 2 can make the liquid coming in from the inlet better enter the through hole until it reaches the flow channel 3 and the flow channel 2, and then be taken away from the upper end of the flow channel 2 together with the liquid at the outlet to form a circulating liquid flow channel, so that the stator body and the rotor body are better cooled.

In the above-mentioned shaftless magnetic pump, the lower part of the impeller protrudes downward with a plurality of circumferentially evenly distributed snap ring buckles, a snap groove is provided between two adjacent snap ring buckles, and the upper end of the through hole 1 protrudes inward with a convex block 1 matching the snap ring buckle and a convex block 2 matching the snap groove. The cooperation between the snap ring buckle and the convex block 1 and the cooperation between the snap groove and the convex block 2 restricts the axial, radial and circumferential rotation of the impeller relative to the rotor shielding sleeve, so that the rotor assembly can better drive the impeller to rotate.

In the above-mentioned shaftless magnetic pump, the stator shielding sleeve includes a shielding sleeve 1 and a shielding sleeve 2, the shielding sleeve 1 and the shielding sleeve 2 are fixed by a fastener 1, the concave cavity is formed on the shielding sleeve 1, the shielding sleeve 2 and the shielding sleeve 1 are combined to form a closed annular accommodating cavity, and the shielding sleeve 1 and the shielding sleeve 2 are fixed by fastener 2 and the outer shell.

In the above-mentioned shaftless magnetic pump, the stator shielding sleeve and the stator body are integrally injection-molded, and the stator shielding sleeve is fixed to the housing via fastener 2.

Compared with the prior art, the technical effects of the present invention are:

1. The stator shielding sleeve and the rotor shielding sleeve are used to fix the rotating assembly 1 and the rotating assembly 2 at the position between the stator body and the rotor body. The rotating assembly 1 and the rotating assembly 2 can support the rotor assembly to rotate relative to the stator assembly, and can also fix the rotor assembly and the stator assembly in the radial direction to prevent radial shaking, so that the rotation is more stable;

2. Rotating assembly 1 and rotating assembly 2 are tightly matched with the stator shielding sleeve and the rotor shielding sleeve, wherein the smooth sliding fit of rotating assembly 1 and rotating assembly 2 enables rotating assembly 1 and rotating assembly 2 to support the rotation of the rotor assembly relative to the stator assembly, and can also be fixed in the radial direction of the rotor assembly and the stator assembly to prevent radial shaking, so that the relative rotation of the rotor assembly and the stator assembly within a smaller gap distance is more stable, and the performance of the shaftless magnetic pump is better;

3. A circulating liquid flow channel is formed by through hole 2, through hole 1, flow channel groove 3, flow channel groove 2, gap channel and flow channel groove 1, so that the stator body and the rotor body are better cooled;

4. A thrust plate 1 is fixedly arranged at one end of the inlet near the impeller, and the lower end surface of the thrust plate 1 is higher than the upper end surface of the thrust convex ring, that is, a certain gap is left between the thrust plate 1 and the thrust convex ring to ensure better rotation of the impeller;

5. The cooperation between the snap ring buckle and the protrusion 1 and the cooperation between the snap groove and the protrusion 2 limits the axial, radial and circumferential rotation of the impeller relative to the rotor shielding sleeve, so that the rotor assembly can better drive the impeller to rotate; 6. The stator shielding sleeve can be integrally formed or separately formed.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a cross-sectional view of the present invention.

FIG. 2 is an exploded view of the stator assembly, the rotor assembly, the rotating assembly 1 and the rotating assembly 2 of the present invention.

FIG. 3 is a perspective view of the impeller of the present invention.

FIG. 4 is a cross-sectional view of the stator shielding sleeve of the present invention.

FIG. 5 is a cross-sectional view of a rotor assembly according to the present invention.

Figure number marking: 1, pump housing; 101, inlet; 102, outlet; 103, pump cavity; 2, motor housing; 201, motor cavity; 3, stator assembly; 31, stator shielding sleeve; 311, shielding sleeve one; 312, shielding sleeve two; 32, stator body; 33, annular accommodating cavity; 34, concave cavity; 35, first mounting groove; 36, second mounting groove; 4, rotor assembly; 41, rotor shielding sleeve; 42, rotor body; 43, through hole one; 44, the second Three mounting grooves; 45, fourth mounting groove; 46, bump one; 47, bump two; 5, rotating component one; 51, ceramic sleeve one; 52, silicon carbide sleeve one; 521, flow channel groove one; 6, rotating component two; 61, ceramic sleeve two; 62, silicon carbide sleeve two; 621, flow channel groove two; 63, thrust plate two; 631, flow channel groove three; 7, impeller; 71, thrust cam; 72, through hole two; 73, snap ring; 74, snap groove; 8, thrust plate one.

DETAILED DESCRIPTION

The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

It should be noted that the descriptions of the present invention regarding directions such as “up”, “down”, “left”, “right”, “top” and “bottom” are all defined based on the relationships between the orientations or positions shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device must be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on the present invention.

As shown in FIGS. 1-5 , a shaftless magnetic pump includes a housing, the housing includes a pump housing 1 and a motor housing 2 that are detachably fixedly connected, the detachable fixed connection can be a bolted fixed connection, wherein the pump housing 1 has an inlet 101 and an outlet 102. A stator assembly 3 and a rotor assembly 4 are arranged in the housing, and the rotor assembly 4 rotates relative to the stator assembly 3.

The rotor assembly 4 comprises a rotor shielding sleeve 41 and a rotor body 42 . The rotor shielding sleeve 41 and the rotor body 42 are integrally formed by injection molding. A through hole 43 is provided in the middle of the rotor shielding sleeve 41 , and the rotor body 42 is arranged around the through hole 43 .

The stator assembly 3 includes a stator shielding sleeve 31 and a stator body 32. The stator shielding sleeve 31 has a closed annular accommodating cavity 33 and a concave cavity 34. The stator body 32 is located in the accommodating cavity, and the rotor assembly 4 is located in the concave cavity 34. The stator shielding sleeve 31 can be designed in a split manner, wherein the stator shielding sleeve 31 includes a shielding sleeve 1 311 and a shielding sleeve 2 312. The shielding sleeve 1 311 and the shielding sleeve 2 312 are fixed by a fastener 1. The concave cavity 34 is formed on the shielding sleeve 1 311. The shielding sleeve 2 312 and the shielding sleeve 1 311 are surrounded to form a closed annular accommodating cavity 33. The shielding sleeve 1 311 and the shielding sleeve 2 312 are fixed to the housing by a fastener 2. The stator shielding sleeve 31 can be designed in an integrated manner. The stator shielding sleeve 31 and the stator body 32 are integrally molded by injection molding, and the stator shielding sleeve 31 is fixed to the housing by a fastener 2.

A rotating assembly 1 5 and a rotating assembly 2 6 are fixedly arranged at a position between the stator body 32 and the rotor body 42 through the stator shielding sleeve 31 and the rotor shielding sleeve 41. The rotating assembly 1 5 and the rotating assembly 2 6 can support the rotor assembly 4 to rotate relative to the stator assembly 3, and can also fix the rotor assembly 4 and the stator assembly 3 in the radial direction to prevent radial shaking, making the rotation more stable.

The accommodating cavity is arranged around the concave cavity 34 to form an inner rotor type shaftless magnetic pump in which the rotor assembly 4 is located in the middle of the stator assembly 3. A first mounting groove 35 is formed at the upper part of the concave cavity 34 of the stator shielding sleeve 31, and a second mounting groove 36 is formed at the lower part of the concave cavity 34 of the stator shielding sleeve 31, wherein the inner circumferential diameter of the first mounting groove 35 is larger than the inner circumferential diameter of the concave cavity 34, and the inner circumferential diameter of the concave cavity 34 is larger than the inner circumferential diameter of the second mounting groove 36. The upper part of the rotor shielding sleeve 41 is indented inwardly relative to the position of the first mounting groove 35 to form a third mounting groove 44, and the first mounting groove 35 and the third mounting groove 44 are fixedly arranged with the rotating assembly 1 5, and the lower part of the rotor shielding sleeve 41 is indented inwardly relative to the position of the second mounting groove 36 to form a fourth mounting groove 45, and the second mounting groove 36 and the fourth mounting groove 45 are fixedly arranged with the rotating assembly 2 6. The gap distance between the stator body 32 and the rotor body 42 can be reduced by fixing the rotating assembly 1 5 in the first mounting groove 35 and the third mounting groove 44 and fixing the rotating assembly 2 6 in the second mounting groove 36 and the fourth mounting groove 45 .

The stator shielding sleeve 31 is detachably fixedly connected between the pump casing 1 and the motor casing 2, the stator shielding sleeve 31 and the pump casing 1 together form a pump chamber 103, the inlet 101, the outlet 102 and the concave cavity 34 are all connected to the pump chamber 103, the stator shielding sleeve 31 and the motor casing 2 together form a motor chamber 201, the pump chamber 103 and the motor chamber 201 are not connected to each other, and there is a gap passage between the outer circumference of the rotor shielding sleeve 41 and the inner circumference of the concave cavity 34, and the gap passage is connected to the pump chamber 103 and the through hole 43.

The gap passage is the gap required when the rotor assembly 4 rotates relative to the stator assembly 3, wherein the above-mentioned rotating assembly 1 5 and rotating assembly 2 6 can stably support the rotor assembly 4 and the stator assembly 3 to form a gap passage and maintain the stability of the spacing of the gap passage when the rotor assembly 4 rotates. By setting the passage gap to be connected with the pump chamber 103 and the through hole 1 43, a flow channel can be formed, so that the liquid entering the pump chamber 103 from the inlet 101 can flow into the gap passage for cooling the stator body 32 and the rotor body 42 and can lubricate the rotating assembly 1 5 and the rotating assembly 2 6.

The rotating assembly 5 includes a ceramic sleeve 51 and a silicon carbide sleeve 52 sleeved outside the ceramic sleeve 51. The silicon carbide sleeve 52 is fixed in the first mounting groove 35, and the ceramic sleeve 51 is fixed in the third mounting groove 44. A flow channel groove 521 is provided on the inner circumference of the silicon carbide sleeve 52. The upper end of the flow channel groove 521 is connected to the pump chamber 103, and the lower end is connected to the channel gap. The outer circumference of the ceramic sleeve 51 and the inner circumference of the silicon carbide sleeve 52 are in smooth sliding fit.

The silicon carbide sleeve 52 and the first mounting groove 35 are tightly fitted and fixed, and the ceramic sleeve 51 and the third mounting groove 44 are tightly fitted and fixed, the ceramic sleeve 51 does not contact the stator shielding sleeve 31, and the silicon carbide sleeve 52 does not contact the rotor shielding sleeve 41, and the outer circumference of the ceramic sleeve 51 and the inner circumference of the silicon carbide sleeve 52 are smoothly slidably fitted, and the tight fit and smooth sliding fit make the spacing of the aisle gap stable, and the liquid flowing through the pump chamber 103 in the flow channel groove 521 can lubricate and cool the silicon carbide sleeve 52 and the ceramic sleeve 51, so that they can rotate better relative to each other.

The rotating assembly 2 6 includes a ceramic sleeve 2 61 and a silicon carbide sleeve 2 62 sleeved outside the ceramic sleeve 2 61. The silicon carbide sleeve 2 62 is fixed in the second mounting groove 36. The ceramic sleeve 2 61 is fixed in the fourth mounting groove 45. The inner circumference of the silicon carbide sleeve 2 62 is provided with a flow channel groove 2 621. The upper end surface of the silicon carbide sleeve 2 62 does not contact the rotor shielding sleeve 41. The outer circumference of the ceramic sleeve 2 61 and the inner circumference of the silicon carbide sleeve 2 62 are in smooth sliding cooperation. The rotating assembly 2 6 also includes a thrust plate 2 63. The thrust plate 2 The lower end surface of the second plate 63 abuts against the bottom surface of the second mounting groove 36, and the upper end surface abuts against the lower end surfaces of the second ceramic sleeve 61 and the second silicon carbide sleeve 62. The upper end surface of the thrust plate 63 is provided with a flow channel groove 3 631. The upper end of the flow channel groove 621 is connected to the aisle gap, and the lower end is connected to the flow channel groove 3 631. The flow channel groove 3 631 is connected to the through hole 1 43. The lower end surface of the rotor shielding sleeve 41 is higher than the upper end surface of the thrust plate 63. The lower end surface of the ceramic sleeve 61 and the upper end surface of the thrust plate 63 are in smooth sliding fit. The thrust plate 2 63 is first tightly fitted with the inner circumferential surface of the second mounting groove 36, and the lower end surface of the thrust plate 2 63 abuts against the bottom surface of the second mounting groove 36. Then the silicon carbide sleeve 2 62 is tightly fitted with the second mounting groove 36, and the ceramic sleeve 2 61 is tightly fitted with the fourth mounting groove 45. The silicon carbide sleeve 2 62 and the thrust plate 2 63 are not in contact with the rotor shielding sleeve 41. The outer circumferential surface of the ceramic sleeve 2 61 and the inner circumferential surface of the silicon carbide sleeve 2 62 are smoothly slidably fitted, and the lower end surface of the ceramic sleeve 2 61 and the upper end surface of the thrust plate 2 63 are smoothly slidably fitted, so that the spacing of the aisle gap is stable, and the liquid flowing through the pump chamber 103 in the flow channel groove 2 621 and the flow channel groove 1 521 can lubricate and cool the silicon carbide sleeve 2 62, the ceramic sleeve 2 61 and the thrust plate 2 63, so that they can rotate better relative to each other.

The upper part of the rotor assembly 4 is fixedly connected with an impeller 7, and a thrust convex ring 71 coaxial with the impeller 7 protrudes upward from the impeller 7. A thrust plate 8 is fixedly arranged at one end of the inlet 101 close to the impeller 7. The thrust plate 8 is arranged opposite to the thrust convex ring 71, and the lower end surface of the thrust plate 8 is higher than the upper end surface of the thrust convex ring 71. Since the housing is a plastic part, the rotor shielding sleeve 41 is also a plastic part, and the plastic part has a certain deformation, a thrust plate 8 is fixedly arranged at one end of the inlet 101 close to the impeller 7, and the lower end surface of the thrust plate 8 is higher than the upper end surface of the thrust convex ring 71, that is, a certain gap is left between the thrust plate 8 and the thrust convex ring 71 to ensure better rotation of the impeller 7.

The middle of the impeller 7 has a second through hole 72, and the first through hole 43 is connected to the pump chamber 103 through the second through hole 72. The second through hole 72 can make the liquid coming from the inlet 101 better enter the first through hole 43 until it reaches the flow channel groove 3 631 and the second flow channel groove 621, and then be taken away from the upper end of the flow channel groove 621 together with the liquid of the outlet 102 to form a circulating liquid flow channel, so that the stator body 32 and the rotor body 42 are better cooled.

The lower part of the impeller 7 protrudes downward with a plurality of circumferentially evenly distributed snap ring buckles 73, a snap groove 74 is provided between two adjacent snap ring buckles 73, and the upper end of the through hole 1 43 protrudes inward with a protrusion 1 46 matching the snap ring buckle 73 and a protrusion 2 47 matching the snap groove 74. The cooperation between the snap ring buckle 73 and the protrusion 1 46 and the cooperation between the snap groove 74 and the protrusion 2 47 limits the axial, radial and circumferential rotation of the impeller 7 relative to the rotor shielding sleeve 41, so that the rotor assembly 4 can better drive the impeller 7 to rotate.

The above embodiments are only preferred embodiments of the present invention and are not intended to limit the protection scope of the present invention. Therefore, any equivalent changes made based on the structure, shape, and principle of the present invention should be included in the protection scope defined by the claims of the present invention.

Claims (10)

1. The utility model provides a shaftless magnetic drive pump, includes the shell, installs stator module (3) and for stator module (3) pivoted integrated into one piece's rotor module (4) in the shell, its characterized in that: stator subassembly (3) include stator shield cover (31) and stator body (32), stator shield cover (31) have confined annular hold chamber (33) and cavity (34), stator body (32) are located holds intracavity (33), rotor subassembly (4) are located cavity (34), rotor subassembly (4) include rotor shield cover (41) and rotor body (42), have through-hole one (43) in the middle of rotor shield cover (41), rotor body (42) encircle through-hole one (43) setting, stator shield cover (31) and rotor shield cover (41) are located fixed being provided with rotation subassembly one (5) and rotation subassembly two (6) in the position between stator body (32) and rotor body (42).

2. A shaftless magnetic pump as claimed in claim 1, wherein: the stator shielding sleeve (31) is arranged on the upper portion of the concave cavity (34) in a forming mode, a first mounting groove (35) is formed in the upper portion of the concave cavity (34), a second mounting groove (36) is formed in the lower portion of the concave cavity (34), the diameter of the inner peripheral surface of the first mounting groove (35) is larger than that of the inner peripheral surface of the concave cavity (34) and larger than that of the second mounting groove (36), a third mounting groove (44) is formed in the upper portion of the rotor shielding sleeve (41) in an inwards retracting mode relative to the position of the first mounting groove (35), a first rotating assembly (5) is fixedly arranged in the first mounting groove (35) and the third mounting groove (44), a fourth mounting groove (45) is formed in the lower portion of the rotor shielding sleeve (41) in an inwards retracting mode relative to the position of the second mounting groove (36), and a second rotating assembly (6) is fixedly arranged in the second mounting groove (36) and the fourth mounting groove (45).

3. A shaftless magnetic pump as claimed in claim 2, wherein: the shell comprises a pump shell (1) and a motor shell (2) which are detachably and fixedly connected, the stator shielding sleeve (31) is detachably and fixedly connected between the pump shell (1) and the motor shell (2), the stator shielding sleeve (31) and the pump shell (1) are surrounded to form a pump cavity (103), the inlet (101), the outlet (102) and the concave cavity (34) are communicated with each other, the stator shielding sleeve (31) and the motor shell (2) are surrounded to form a motor cavity (201), the pump cavity (103) and the motor cavity (201) are not communicated with each other, a gap passage is formed between the outer peripheral surface of the rotor shielding sleeve (41) and the inner peripheral surface of the concave cavity (34), and the gap passage is communicated with the pump cavity (103) and the first through hole (43).

4. A shaftless magnetic pump according to claim 3, wherein: the first rotating assembly (5) comprises a first ceramic sleeve (51) and a first silicon carbide sleeve (52) sleeved outside the first ceramic sleeve (51), the first silicon carbide sleeve (52) is fixed in the first mounting groove (35), the first ceramic sleeve (51) is fixed in the third mounting groove (44), a first runner groove (521) is formed in the inner peripheral surface of the first silicon carbide sleeve (52), the upper end of the first runner groove (521) is communicated with the lower end of the pump cavity (103) and is communicated with the clearance passageway, and the outer peripheral surface of the first ceramic sleeve (51) is in smooth sliding fit with the inner peripheral surface of the first silicon carbide sleeve (52).

5. A shaftless magnetic pump as claimed in claim 4, wherein: the second rotating component (6) comprises a second ceramic sleeve (61) and a second silicon carbide sleeve (62) sleeved outside the second ceramic sleeve (61), the second silicon carbide sleeve (62) is fixed in a second mounting groove (36), the second ceramic sleeve (61) is fixed in a fourth mounting groove (45), a runner groove (621) is formed in the inner peripheral surface of the second silicon carbide sleeve (62), the upper end surface of the second silicon carbide sleeve (62) is not in contact with a rotor shielding sleeve (41), the outer peripheral surface of the second ceramic sleeve (61) is in smooth sliding fit with the inner peripheral surface of the second silicon carbide sleeve (62), the second rotating component (6) further comprises a second thrust disc (63), the lower end surface of the second thrust disc (63) is abutted against the bottom surface of the second mounting groove (36), the upper end surface of the second ceramic sleeve (61) and the lower end surface of the second silicon carbide sleeve (62), a runner groove (621) is formed in the inner peripheral surface of the second silicon carbide sleeve (62), the upper end surface of the second thrust disc (631) is not in contact with a rotor shielding sleeve (41), and the upper end surface of the second thrust disc (631) is in sliding fit with the upper end surface of the third runner groove (631), and the lower end surface of the second thrust disc (631) is in communication with the upper end surface of the third runner groove (631).

6. The shaftless magnetic drive pump of any of claims 1-5, wherein: the novel anti-thrust motor is characterized in that an impeller (7) is fixedly connected to the upper portion of the rotor assembly (4), a thrust convex ring (71) coaxial with the impeller (7) protrudes upwards from the impeller (7), a thrust disc I (8) is fixedly arranged at one end, close to the impeller (7), in the inlet (101), of the inlet, the thrust disc I (8) and the thrust convex ring (71) are oppositely arranged, and the lower end face of the thrust disc I (8) is higher than the upper end face of the thrust convex ring (71).

7. A shaftless magnetic pump as claimed in claim 6, wherein: the middle of the impeller (7) is provided with a second through hole (72), and the first through hole (43) is communicated with the pump cavity (103) through the second through hole (72).

8. A shaftless magnetic pump as claimed in claim 7, wherein: the impeller (7) lower part downward bulge has a plurality of circumference evenly distributed's snap ring to detain (73), is provided with draw-in groove (74) between two adjacent snap ring detains (73), the lug one (46) and the lug two (47) of matching with draw-in groove (74) that inwards bulge has with snap ring detain (73) to through-hole one (43) upper end.

9. A shaftless magnetic pump as claimed in claim 1, wherein: the stator shielding sleeve (31) comprises a shielding sleeve I (311) and a shielding sleeve II (312), the shielding sleeve I (311) and the shielding sleeve II (312) are fixed through a fastening piece I, the concave cavity (34) is formed in the shielding sleeve I (311), the shielding sleeve II (312) and the shielding sleeve I (311) are surrounded to form a closed annular accommodating cavity (33), and the shielding sleeve I (311) and the shielding sleeve II (312) are fixed through the fastening piece II and the shell.

10. A shaftless magnetic pump as claimed in claim 1, wherein: the stator shielding sleeve (31) and the stator body (32) are integrally injection molded, and the stator shielding sleeve (31) is fixed with the shell through a second fastener.