CN114776600B

CN114776600B - Magnetic pump

Info

Publication number: CN114776600B
Application number: CN202210544874.8A
Authority: CN
Inventors: 曹翔
Original assignee: Individual
Current assignee: Lin Pengxi
Priority date: 2022-05-19
Filing date: 2022-05-19
Publication date: 2024-02-09
Anticipated expiration: 2042-05-19
Also published as: CN114776600A

Abstract

The invention provides a magnetic pump, which belongs to the technical field of pump valves and comprises a motor, a pump body, a pump cover, an impeller, an outer magnet, an inner magnet and a shaft, wherein the pump cover is in sealing connection with the pump body, the outer magnet is connected with the shaft end of the motor, a spacer bush is fixed on the pump body, the spacer bush is arranged between the inner magnet and the outer magnet, the shaft comprises a main shaft and a secondary shaft which are mutually clamped, blind holes are formed in one ends of the main shaft and the secondary shaft, a sealing cavity is formed by the blind holes after the main shaft and the secondary shaft are in sealing connection, and cooling liquid is filled in the sealing cavity.

Description

Magnetic pump

Technical Field

The invention belongs to the technical field of pump valves, and particularly relates to a magnetic pump.

Background

In the structure of the magnetic pump, the transmission shaft of the motor does not need to penetrate into the pump shell, but utilizes the magnetic field to drive the inner magnetic rotor through the magnetic field and the thin-wall transmission torque of the isolation sleeve, so that the leakage channel of the shaft seal is fundamentally eliminated, and the complete sealing between the pumped liquid and the motor is realized.

The magnetic pump generally adopts a sliding bearing, and the sliding bearing can generate heat in the operation process, and the heat can only be taken away by the medium self recycled in the magnetic pump. Thus, once the medium contains particles, the particles flowing to the location of the slide bearing will block the circulation flow path in the slide bearing.

In addition, the sliding bearing is dry ground when the magnetic pump idles, the temperature of the sliding bearing rises sharply in a short time, and if the sliding bearing main body material is engineering plastics, the sliding bearing can expand and bite the shaft to cause the damage of the magnetic pump. If the sliding bearing is made of ceramic material, the sliding bearing can burst after the temperature is increased sharply, and the magnetic pump is damaged.

Therefore, in order to solve the abrasion of the driving part when the magnetic pump is operated at a high temperature, it is necessary to provide a magnetic pump capable of self-adjusting rotation at a high temperature.

Disclosure of Invention

The invention aims to provide a magnetic pump, which aims to solve the problem that in the prior art, the magnetic pump is extremely easy to cause abrasion of a pump body rotating member at a high temperature or in an idle state.

In order to achieve the above purpose, the present invention provides the following technical solutions:

the utility model provides a magnetic drive pump, includes motor, pump body, pump cover, impeller, outer magnet, interior magnet, axle, pump cover and pump body sealing connection, outer magnet is connected with the axle head of motor, be fixed with the spacer sleeve on the pump body, the spacer sleeve sets up between magnet and outer magnet including, the axle includes main shaft and the countershaft of mutual joint, the blind hole has all been seted up to main shaft and countershaft one end, and the blind hole after main shaft and countershaft sealing connection forms sealed chamber, sealed intracavity is filled with the coolant liquid, outer latch and seal groove have been seted up to main shaft one end, the ring channel has been seted up near the periphery side of outer latch to the countershaft one end, be provided with the go-between in the go-between, be provided with interior latch in the go-between, spacing has the snap ring on the ring channel of main shaft, the snap ring rotates with the main shaft to be connected, the go-between is connected through the round pin axle, the epaxial cover is equipped with compression spring, the round pin axle cap all is fixed with at the round pin axle both ends, compression spring spacing is provided with between one end of round pin cap and go-between the go-between, be provided with elastic seal between.

As a further scheme of the invention: one end of the main shaft is fixedly connected with the inner magnet, the auxiliary shaft penetrates through the pump cover and is fixedly connected with the impeller through the impeller nut, the auxiliary shaft is sleeved with a shaft sleeve, the shaft sleeve is in running fit with the pump cover, and a thrust plate is arranged between the shaft sleeve and the impeller.

As a further scheme of the invention: the length of the pin shaft is set to enable the compression spring and the elastic sealing ring to be in a compression state, and meanwhile the main shaft and the auxiliary shaft are tightly clamped.

As a further scheme of the invention: the tooth heights of the outer clamping teeth and the inner clamping teeth are the same, and the compression amount of the elastic sealing ring is larger than the tooth height of the outer clamping teeth.

As a further scheme of the invention: when the compression spring reaches the limit compression state, the elastic sealing ring is still in the compression state.

As a further scheme of the invention: and a sealing gasket is arranged in the sealing groove.

As a further scheme of the invention: the tooth grooves between the inner clamping teeth are matched with the outer clamping teeth, and the tooth grooves between the outer clamping teeth are matched with the inner clamping teeth.

As a further scheme of the invention: the inner diameter of the connecting ring is the same as the outer diameter of the main shaft.

As a further scheme of the invention: the cooling liquid is any one of gasoline, alcohol and diethyl ether.

Compared with the prior art, the invention has the beneficial effects that:

1. the shaft is divided into the main shaft connected with the inner magnet and the auxiliary shaft connected with other rotating parts in the pump body, so that the main shaft and the auxiliary shaft are separated effectively during high-temperature operation, after the main shaft and the auxiliary shaft are completely separated, the outer clamping teeth and the inner clamping teeth are completely separated, only the main shaft rotates along with the inner magnet, and the auxiliary shaft stops rotating, and the auxiliary shaft is mainly connected with the rotating part of the pump body, so that the loss of a rotating part in the pump body during high-temperature operation is avoided, especially, the impeller and the pump cover are not contacted with liquid under the idling state of the pump, the rotating speed is high, the temperature is lack to be reduced, the temperature is rapidly increased, the idling damage of the pump body is extremely easy to be caused, and the idle damage of the pump body is completely avoided due to the separation of the main shaft and the auxiliary shaft.

Drawings

The accompanying drawings are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate the invention and together with the embodiments of the invention, serve to explain the invention. In the drawings:

FIG. 1 is a schematic overall cross-sectional view of a magnetic pump according to the present invention;

FIG. 2 is an exploded view of the shaft of the magnetic pump of the present invention;

FIG. 3 is a front view of the shaft of the magnetic pump of the present invention;

FIG. 4 is a schematic view of the B-direction of FIG. 3;

FIG. 5 is a schematic diagram of the main shaft of the magnetic pump of the present invention;

fig. 6 is a schematic diagram of the structure of the auxiliary shaft of the magnetic pump of the present invention.

In the figure: 1. a motor; 2. a pump body; 3. a pump cover; 4. an impeller; 5. an outer magnet; 6. an inner magnet; 7. a shaft; 71. a main shaft; 711. an outer latch; 712. sealing grooves; 713. an annular groove; 72. a secondary shaft; 721. a connecting ring; 722. an inner latch; 8. a spacer sleeve; 9. an impeller nut; 10. a shaft sleeve; 11. a thrust plate; 12. and (5) a blind hole.

Detailed Description

The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

Referring to fig. 1-6, the present invention provides the following technical solutions: the utility model provides a magnetic drive pump, including motor 1, pump body 2, pump cover 3, impeller 4, outer magnet 5, interior magnet 6, axle 7, pump cover 3 and pump body 2 sealing connection, base 13 is all installed to motor 1 and pump body 2 bottom, and outer magnet 5 is connected with motor 1's axle head, is fixed with spacer 8 on the pump body 2, and spacer 8 sets up between magnet 6 and outer magnet 5, and the theory of operation of outer magnet 5 and interior magnet 6 belongs to the common sense of magnetic drive pump, and no more detailed description is given here.

The shaft 7 of this embodiment includes main shaft 71 and auxiliary shaft 72 of mutual joint, and main shaft 71 one end and interior magnet 6 fixed connection, auxiliary shaft 72 run through pump cover 3 and impeller 4 and pass through impeller nut 9 fixed connection, and auxiliary shaft 72 cover is equipped with axle sleeve 10, and axle sleeve 10 and pump cover 3 normal running fit are provided with thrust plate 11 between axle sleeve 10 and the impeller 4.

Blind holes 12 are formed in one end of the main shaft 71 and one end of the auxiliary shaft 72, a sealing cavity 73 is formed in the blind holes 12 after the main shaft 71 and the auxiliary shaft 72 are in sealing connection, cooling liquid is filled in the sealing cavity 73, an outer latch 711 and a sealing groove 712 are formed in one end of the main shaft 71, a sealing ring is installed in the sealing groove 712, and internal sealing after the main shaft 71 and the auxiliary shaft 72 are clamped is achieved.

An annular groove 713 is formed in the outer peripheral side, close to the outer clamping teeth 711, of the main shaft 71, a connecting ring 721 is arranged at one end of the auxiliary shaft 72, the inner diameter of the connecting ring 721 is identical to the outer diameter of the main shaft 71, inner clamping teeth 722 are arranged in the connecting ring 721, tooth grooves between the inner clamping teeth 722 are matched with the outer clamping teeth 711, and tooth grooves between the outer clamping teeth 711 are matched with the inner clamping teeth 722.

The annular groove 713 of the main shaft 71 is limited with the snap ring 74, the snap ring 74 is rotationally connected with the main shaft 71, the connecting ring 721 is connected with the snap ring 74 through the pin shaft 75, the pin shaft 75 is sleeved with the compression spring 76, pin shaft caps are fixed at two ends of the pin shaft 75, the compression spring 76 is limited between one end pin shaft cap of the pin shaft and the connecting ring 721, the elastic sealing ring 77 is arranged between the snap ring 74 and the connecting ring 721, and the elastic sealing ring 77 is a silica gel or rubber sealing ring with the thickness of 20mm-30mm, so that the elastic sealing ring has stronger toughness.

The length of the pin 75 is set so that the compression spring 76 and the elastic sealing ring 77 are in a compressed state, and meanwhile, the main shaft 71 and the auxiliary shaft 72 are tightly clamped, and pin caps are welded at two ends of the pin after the pin 75 is installed, so that the shaft 7 is prevented from falling off in the high-speed running process.

Wherein, the tooth heights of the outer clamping teeth 711 and the inner clamping teeth 722 are the same, and the compression amount of the elastic sealing ring 77 is larger than the tooth height of the outer clamping teeth 711, and when the compression spring reaches the limit compression state, the elastic sealing ring 77 is still in the compression state, so that the high sealing performance of the elastic sealing ring 77 can be ensured after the outer clamping teeth 711 and the inner clamping teeth 722 are separated.

The cooling liquid is any one of gasoline, alcohol and diethyl ether, and is selected according to the maximum rotation speed of the magnetic pump, and under the condition of large maximum rotation speed, the cooling liquid with higher boiling point is selected, and under the condition of small maximum rotation speed, the cooling liquid with lower boiling point is selected.

When the cooling liquid rotates on the shaft of the magnetic pump, the cooling effect is realized on the shaft and the components rotating synchronously with the shaft, when the magnetic pump works for a long time, the temperature of the shaft gradually rises, at the moment, the cooling liquid in the sealing cavity 73 begins to evaporate and expand, and then the main shaft 71 and the auxiliary shaft 72 are pushed to separate, so that the pin shaft 75 moves towards the direction of the clamping ring 74, the compression spring 76 is further compressed, the elastic sealing ring 77 begins to reduce the compression amount, the inner diameter of the elastic sealing ring 77 is larger than one of the main shaft 71, and after the compression amount of the elastic sealing ring 77 is reduced, the rotation friction between the main shaft 71 and the elastic sealing ring 77 is reduced or even disappears.

When the main shaft 71 and the auxiliary shaft 72 are completely separated, the outer latch 711 is completely separated from the inner latch 722, and only the main shaft 71 rotates along with the inner magnet 6, while the auxiliary shaft 72 stops rotating, and the auxiliary shaft 72 is mainly connected with the rotating part of the pump body, so that the loss of the rotating member of the pump body during high-temperature operation is avoided. Especially, when the impeller and the pump cover are not in contact with liquid in the idle state, the rotation speed is high, the temperature is lack to be reduced, the temperature is rapidly increased, the idle damage of the pump body is extremely easy to be caused, and the idle loss of the pump body is completely avoided due to the separation of the main shaft 71 and the auxiliary shaft 72.

Compared with the traditional pump body 2, the invention divides the shaft 7 into the main shaft 71 connected with the inner magnet and the auxiliary shaft 72 connected with other rotating parts in the pump body 2, effectively realizes the separation of the main shaft 71 and the auxiliary shaft 72 during high-temperature operation, avoids the loss of rotating parts of the pump body 2 and the shaft 7 during high-temperature operation, has long service life, is convenient for manual maintenance, can be suitable for various use scenes according to the selection of cooling liquid in the sealing cavity 73, and has wide application range.

Finally, it should be noted that: the foregoing description is only a preferred embodiment of the present invention, and the present invention is not limited thereto, but it is to be understood that modifications and equivalents of some of the technical features described in the foregoing embodiments may be made by those skilled in the art, although the present invention has been described in detail with reference to the foregoing embodiments. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A magnetic pump, characterized in that: comprises a motor, a pump body, a pump cover, an impeller, an outer magnet, an inner magnet and a shaft;

the pump cover is connected with the pump body in a sealing way, the outer magnet is connected with the shaft end of the motor, the pump body is fixedly provided with a spacer sleeve, and the spacer sleeve is arranged between the inner magnet and the outer magnet;

the shaft comprises a main shaft and a secondary shaft which are clamped with each other, blind holes are formed in one end of the main shaft and one end of the secondary shaft, the blind holes after the main shaft and the secondary shaft are in sealing connection form a sealing cavity, cooling liquid is filled in the sealing cavity, an outer clamping tooth and a sealing groove are formed in one end of the main shaft, an annular groove is formed in the outer peripheral side, close to the outer clamping tooth (711), of the main shaft, a connecting ring is arranged at one end of the secondary shaft, and an inner clamping tooth is arranged in the connecting ring;

the annular groove of the main shaft is limited by a clamping ring, the clamping ring is rotationally connected with the main shaft, the connecting ring is connected with the clamping ring through a pin shaft, a compression spring is sleeved on the pin shaft, pin shaft caps are fixed at two ends of the pin shaft, the compression spring is limited between one end of the pin shaft and the connecting ring, and an elastic sealing ring is arranged between the clamping ring and the connecting ring.

2. The magnetic pump of claim 1, wherein: one end of the main shaft is fixedly connected with the inner magnet, the auxiliary shaft penetrates through the pump cover and is fixedly connected with the impeller through the impeller nut, the auxiliary shaft is sleeved with a shaft sleeve, the shaft sleeve is in running fit with the pump cover, and a thrust plate is arranged between the shaft sleeve and the impeller.

3. The magnetic pump of claim 1, wherein: the length of the pin shaft is set to enable the compression spring and the elastic sealing ring to be in a compression state, and meanwhile the main shaft and the auxiliary shaft are tightly clamped.

4. A magnetic pump according to claim 3, wherein: the tooth heights of the outer clamping teeth and the inner clamping teeth are the same, and the compression amount of the elastic sealing ring is larger than the tooth height of the outer clamping teeth.

5. The magnetic pump of claim 4, wherein: when the compression spring reaches the limit compression state, the elastic sealing ring is still in the compression state.

6. The magnetic pump of claim 1, wherein: and a sealing gasket is arranged in the sealing groove.

7. The magnetic pump of claim 1, wherein: the tooth grooves between the inner clamping teeth are matched with the outer clamping teeth, and the tooth grooves between the outer clamping teeth are matched with the inner clamping teeth.

8. The magnetic pump of claim 1, wherein: the inner diameter of the connecting ring is the same as the outer diameter of the main shaft.

9. The magnetic pump of claim 1, wherein: the cooling liquid is any one of gasoline, alcohol and diethyl ether.

10. The magnetic pump of claim 1, wherein: the motor and the bottom of the pump body are both provided with bases.