CN114776600A

CN114776600A - Magnetic pump

Info

Publication number: CN114776600A
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: 2022-07-22
Anticipated expiration: 2042-05-19
Also published as: CN114776600B

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 connected with the pump body in a sealing manner, the outer magnet is connected with the shaft end of the motor, an isolation sleeve is fixed on the pump body and is arranged between the inner magnet and the outer magnet, the shaft comprises a main shaft and an auxiliary shaft which are clamped with each other, blind holes are formed in one ends of the main shaft and the auxiliary shaft, a sealed cavity is formed by the blind holes after the main shaft and the auxiliary shaft are connected in a sealing manner, and cooling liquid is filled in the sealed 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, a transmission shaft of the motor does not need to penetrate into a pump shell, but the magnetic field penetrates through the magnetic field and the thin-wall of the isolation sleeve to drive the torque to drive the inner magnetic rotor, so that a leakage channel of the shaft seal is fundamentally eliminated, and the pumped liquid and the motor are completely sealed.

The magnetic pump generally adopts a sliding bearing, the sliding bearing can generate heat in the operation process, and the heat can be only taken away by a medium which is recycled in the magnetic pump. Thus, once the medium contains particles, the particles that flow to the location of the plain bearing can clog the circulation flow path in the plain bearing.

In addition, the magnetic pump can also cause dry grinding of the sliding bearing when idling, the temperature of the sliding bearing is rapidly increased in a short time, and if the main material of the sliding bearing is engineering plastics, the sliding bearing can expand to seize the shaft, so that the magnetic pump is damaged. If the sliding bearing is made of ceramic material, the sliding bearing will burst after a sharp temperature rise, which also results in damage to the magnetic pump.

Therefore, in order to solve the problem of abrasion of the transmission components during high-temperature operation of the magnetic pump, it is necessary to provide a magnetic pump capable of self-regulating rotation under high-temperature conditions.

Disclosure of Invention

The invention aims to provide a magnetic pump, and aims to solve the problem that in the prior art, a rotating part of a pump body is easily abraded in a high-temperature or idle state of the magnetic pump.

In order to achieve the purpose, the invention provides the following technical scheme:

a magnetic pump 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 connected with the pump body in a sealing manner, the outer magnet is connected with the shaft end of the motor, an isolation sleeve is fixed on the pump body and is arranged between the inner magnet and the outer magnet, the shaft comprises a main shaft and an auxiliary shaft which are clamped with each other, blind holes are formed in one ends of the main shaft and the auxiliary shaft, a sealing cavity is formed by the blind holes after the main shaft and the auxiliary shaft are connected in a sealing manner, cooling liquid is filled in the sealing cavity, an outer latch and a sealing groove are formed in one end of the main shaft, an annular groove is formed in the periphery of the main shaft close to the outer latch, a connecting ring is arranged at one end of the auxiliary shaft, an inner latch is arranged in the connecting ring, a clamping ring is limited on the annular groove of the main shaft and is rotatably 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, the pin shaft cap is fixed at each of the two ends of the pin shaft, the compression spring is limited between the pin shaft cap at one end of the pin shaft and the connecting ring, and the elastic sealing ring is arranged between the clamping ring and the connecting ring.

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 height of outer latch is the same with interior latch, just the decrement of elasticity sealing washer is greater than the tooth height of outer latch.

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 socket between the inner clamping teeth is matched with the outer clamping teeth, and the tooth socket between the outer clamping teeth is 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 ether.

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

1. the shaft of the invention is divided into a main shaft connected with the inner magnet and an auxiliary shaft connected with other rotating parts in the pump body, when the high-temperature operation is carried out, the separation of the main shaft and the auxiliary shaft is effectively realized, when the main shaft and the auxiliary shaft are completely separated, the outer latch and the inner latch are completely separated, only the main shaft rotates along with the inner magnet at the moment, and the auxiliary shaft stops rotating.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:

FIG. 1 is a schematic overall 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 FIG. 3 taken along line B;

FIG. 5 is a schematic structural view of a spindle of the magnetic pump of the present invention;

fig. 6 is a schematic structural view of a countershaft 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. a sealing groove; 713. an annular groove; 72. a counter shaft; 721. a connecting ring; 722. an inner latch; 8. an isolation sleeve; 9. an impeller nut; 10. a shaft sleeve; 11. a thrust plate; 12. and (4) blind holes.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, belong to the protection scope of the present 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, the pump body 2, the 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, outer magnet 5 is connected with the axle head of motor 1, be fixed with separation sleeve 8 on the pump body 2, separation sleeve 8 sets up between interior magnet 6 and outer magnet 5, the theory of operation of outer magnet 5 and interior magnet 6 belongs to the common general knowledge of magnetic drive pump, no longer describe here.

The shaft 7 of the embodiment includes a main shaft 71 and an auxiliary shaft 72 which are clamped with each other, one end of the main shaft 71 is fixedly connected with the inner magnet 6, the auxiliary shaft 72 penetrates through the pump cover 3 and is fixedly connected with the impeller 4 through an impeller nut 9, the auxiliary shaft 72 is sleeved with a shaft sleeve 10, the shaft sleeve 10 is in running fit with the pump cover 3, and a thrust plate 11 is arranged between the shaft sleeve 10 and the impeller 4.

The blind holes 12 are formed in one ends of the main shaft 71 and the auxiliary shaft 72, the blind holes 12 formed after the main shaft 71 and the auxiliary shaft 72 are connected in a sealing mode form a sealing cavity 73, cooling liquid is filled in the sealing cavity 73, the outer clamping teeth 711 and the 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 connected in a clamping mode is achieved.

An annular groove 713 is formed in the outer peripheral side, close to the outer latch 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 the same as the outer diameter of the main shaft 71, inner latches 722 are arranged in the connecting ring 721, tooth grooves between the inner latches 722 are matched with the outer latch 711, and tooth grooves between the outer latches 711 are matched with the inner latches 722.

The upper limit of the annular groove 713 of the main shaft 71 is provided with a clamping ring 74, the clamping ring 74 is rotatably connected with the main shaft 71, the connecting ring 721 is connected with the clamping ring 74 through a pin shaft 75, the pin shaft 75 is sleeved with a compression spring 76, pin shaft caps are fixed at two ends of the pin shaft 75, the compression spring 76 is limited between the pin shaft cap at one end of the pin shaft and the connecting ring 721, an elastic sealing ring 77 is arranged between the clamping 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 and has high toughness.

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

The tooth height of the outer latch 711 is the same as that of the inner latch 722, the compression amount of the elastic sealing ring 77 is larger than that of the outer latch 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 guaranteed after the outer latch 711 is separated from the inner latch 722.

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

When the shaft of the magnetic pump rotates, the cooling liquid achieves a cooling effect on the shaft and a component rotating synchronously with the shaft, when the shaft 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 further compresses, the elastic sealing ring 77 begins to reduce the compression amount, the inner diameter of the elastic sealing ring 77 is larger than that 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 and the inner latch 722 are completely separated, only the main shaft 71 rotates along with the inner magnet 6, 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 part in the pump body during high-temperature operation is avoided. Particularly, when the impeller and the pump cover are not in contact with liquid in an idling state of the pump, the rotating speed is high, the temperature is not reduced, the temperature rises rapidly, the idling damage of the pump body is easily caused, and the main shaft 71 and the auxiliary shaft 72 are separated, so that the idling loss of the pump body is completely avoided.

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 the rotating part 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 sealed cavity 73, and has wide application.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the invention. Any modification, equivalent replacement, or improvement 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 drive pump, characterized by: 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 manner, the outer magnet is connected with the shaft end of the motor, and an isolation sleeve is fixed on the pump body and arranged between the inner magnet and the outer magnet;

the shaft comprises a main shaft and an auxiliary shaft which are clamped with each other, blind holes are formed in one ends of the main shaft and the auxiliary shaft, a sealing cavity is formed by the blind holes after the main shaft and the auxiliary shaft are connected in a sealing mode, cooling liquid is filled in the sealing cavity, an outer latch and a sealing groove are formed in one end of the main shaft, an annular groove is formed in the periphery side, close to the outer latch (711), of the main shaft, a connecting ring is arranged at one end of the auxiliary shaft, and an inner latch is arranged in the connecting ring;

the improved spindle is characterized in that a clamping ring is limited on the annular groove of the spindle and is rotatably connected with the spindle, 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 the pin shaft cap at 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. The magnetic drive pump of claim 3, wherein: the tooth height of outer latch is the same with the tooth height of interior latch, just the deflection of elasticity sealing washer is greater than the tooth height of outer latch.

5. The magnetic drive 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 socket between the inner clamping teeth is matched with the outer clamping teeth, and the tooth socket between the outer clamping teeth is 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 ether.

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