CN102434467A - Speed changing magnetic pump - Google Patents

Abstract

The invention provides a variable-speed magnetic pump, which includes a pump body, a variable-speed magnetic transmission device installed in the inner cavity of the casing, and a driving motor. The variable-speed magnetic transmission device includes an inner magnetic rotor, an outer magnetic rotor, a spacer sleeve and a magnetic adjustment ring , the inner magnetic rotor includes an inner magnetic rotor magnet ring and an inner magnetic rotor core, the outer magnetic rotor includes an outer magnetic rotor iron core and an outer magnetic rotor magnet ring, and the outer magnetic rotor magnet ring and the inner magnetic rotor magnet ring An annular cavity is formed between them, and a spacer sleeve is placed in the annular cavity, the spacer sleeve is fixedly connected with the pump body, the magnetic modulation ring is fixedly installed on the spacer sleeve, and the magnetic modulation The ring is composed of multiple iron core blocks and multiple epoxy blocks connected at intervals to form a ring body. The magnetic modulation ring is used to modulate the magnetic field of the inner magnetic rotor and the outer magnetic rotor, so that the output connected to the impeller in the pump body The rotational speed of the shaft is different from the rotational speed of the input shaft connected to the drive motor.

Description

Variable speed magnetic pump

technical field

The invention relates to the field of transmission technology, in particular to a variable-speed magnetic pump capable of adjusting the rotational speeds of an input shaft on a drive motor and an output shaft connected to a pump body.

Background technique

The magnetic pump consists of three parts: drive motor, magnetic drive, and pump body. The key component, the magnetic drive, consists of an outer magnetic rotor, an inner magnetic rotor and a non-magnetic isolation sleeve. When the drive motor drives the outer magnetic rotor to rotate, the magnetic field can penetrate the air gap and non-magnetic substances, and drive the inner magnetic rotor connected to the impeller on the pump shaft in the pump body to rotate synchronously, and the inner magnetic rotor drives the pump shaft to rotate, so that the impeller rotor Turn work. Generally, the inner and outer magnetic rotors have the same number of pole pairs, and the speed driven by the driving motor is the same as the speed of the impeller. If the speeds of the two are different, then a mechanical gear transmission device or a frequency conversion should be used between the driving motor and the impeller. Drive motor drive. However, the mechanical gear transmission has mechanical wear, vibration noise, needs lubrication, and cannot cut off the transmission relationship when overloaded, which will damage the transmission or damage the prime mover. And motor frequency conversion speed regulation will produce electromagnetic interference. the

Contents of the invention

The purpose of the present invention is to solve the above-mentioned technical problems and provide a variable-speed magnetic pump, which can make the rotating speed driven by the drive motor different from the rotating speed of the impeller, and has no mechanical wear, no lubrication, and no vibration noise. The transmission relationship can be cut off at any time, and the electromagnetic interference generated by the frequency conversion speed regulation of the motor can be avoided.

To achieve the above object, the present invention provides the following technical solutions:

A variable-speed magnetic pump, comprising a pump body, a drive motor, and a variable-speed magnetic transmission device arranged in the inner cavity of a casing, the variable-speed magnetic transmission device includes an inner magnetic rotor, an outer magnetic rotor, a spacer sleeve and a magnetic adjustment ring, and the inner magnetic The rotor includes an inner magnetic rotor magnet ring and an inner magnetic rotor core, the outer magnetic rotor includes an outer magnetic rotor core and an outer magnetic rotor magnet ring, and the drive motor drives the outer magnetic rotor to rotate through a coupling and the input shaft , the input rotating shaft is arranged on the bearing in the end cover; the inner side of the cup-shaped sleeve of the inner cavity of the housing is provided with an outer magnetic rotor core, and the inner wall of the outer magnetic rotor core is provided with an outer magnetic rotor magnet ring; The end near the pump body on the output shaft supported by the sliding bearing is provided with a magnetic pump impeller, and an inner magnetic rotor core is provided at one end of the variable-speed magnetic transmission device through an inner sleeve, and the outer wall of the inner magnetic rotor core is provided with The inner magnetic rotor magnet ring is characterized in that: an annular cavity is formed between the outer magnetic rotor magnet ring and the inner magnetic rotor magnet ring, and a spacer sleeve is arranged in the annular cavity, and the spacer sleeve Connected with the pump body, the spacer sleeve is provided with the magnetic modulation ring for modulating the magnetic fields of the inner magnetic rotor and the outer magnetic rotor.

Further, the magnetic modulation ring is connected to form a ring body by a plurality of iron core blocks and a plurality of epoxy blocks at intervals, and the magnetic modulation ring is used to modulate the magnetic field of the inner magnetic rotor and the outer magnetic rotor, so that the rotational speed of the output shaft different from the rotational speed of the input shaft.

Further, the outer magnetic rotor magnet ring is composed of 2P ₂ permanent magnet poles arranged uniformly on the inner wall of the outer magnetic rotor core, and the inner magnetic rotor magnet ring is uniformly arranged on the outer wall of the inner magnetic rotor core. 2P ₁ permanent magnet pole, each permanent magnet pole of the inner magnetic rotor magnet ring and each permanent magnet magnetic pole of the outer magnetic rotor magnet ring are respectively radially magnetized, and the respective adjacent permanent magnet magnetic poles The inner magnetic rotor and the outer magnetic rotor have the same circle center, and each can rotate in forward and reverse directions. The magnetic modulation ring is connected to form a ring body by P ₁ + P ₂ iron core blocks and P ₁ + P ₂ epoxy blocks at intervals, and the magnetic modulation ring is used to modulate the magnetic field of the inner magnetic rotor and the outer magnetic rotor, so that the The rotational speed of the output rotating shaft is different from that of the input rotating shaft, and the ratio between them is P ₂ : P ₁ , which meets the requirements of different loads and avoids the electromagnetic interference generated by the frequency conversion speed regulation of the motor.

Further, an inner layer air gap is formed between the inner magnetic rotor and the spacer sleeve, so that there is no mechanical contact between the inner magnetic rotor and the spacer sleeve; The outer air gap is formed, so that there is no mechanical contact between the outer magnetic rotor and the magnetic adjustment ring; because there is no mechanical contact, there is no mechanical wear, no lubrication, high reliability, long life, and no mechanical contact The vibration noise generated during the operation; the spacer sleeve forms a sealed cavity between the inner magnetic rotor and the outer magnetic rotor, and the output shaft and the inner magnetic rotor are sealed in the sealed cavity to prevent Fluid leaks to the outside, and cools the variable speed magnetic drive.

Further, through the two-layer air gap outside the magnetic adjustment ring and inside the spacer sleeve, the variable speed magnetic transmission device adopts magnetic drive instead of mechanical gear transmission. When the torque exceeds a certain limit, that is, overload, the variable speed magnetic force The transmission device will cut off the transmission relationship at any time, not only the transmission itself will not be damaged, but also the prime mover can be protected.

The positive effect of the variable-speed magnetic pump of the present invention is that: the variable-speed magnetic drive device can make the rotating speed of the motor drive different from the rotating speed of the impeller, and only have bearing friction loss and iron core loss, energy loss is small, and efficiency is high; since there is no mechanical contact, there is no Mechanical wear, no lubrication, high reliability, long life; there is no vibration noise generated during mechanical contact; and the transmission relationship is cut off at any time when overloaded, not only the transmission itself will not be damaged, but also the prime mover can be protected; motor frequency conversion is avoided Electromagnetic interference generated by speed regulation.

Description of drawings

Fig. 1 is the structural sectional view of variable speed magnetic pump of the present invention;

Fig. 2 is a sectional view along line A-A in Fig. 1 .

The labels in the figure are:

1. Pump body; 2. Impeller; 3. Shell; 4. End cover;

5. Cup-shaped sleeve; 6. Outer magnetic rotor core; 7. Outer magnetic rotor magnet ring;

8. Magnet adjustment ring; 801, core block; 802, epoxy block;

9. Isolation sleeve; 10. Inner magnetic rotor magnet ring; 11. Inner magnetic rotor core;

12. Inner shaft sleeve; 13. Input shaft; 14. Output shaft;

15. Coupling; 16. Driving motor.

Detailed ways

The following describes the specific implementation of the variable speed magnetic pump of the present invention with reference to the accompanying drawings.

Referring to accompanying drawings 1 and 2, a variable-speed magnetic pump includes a pump body 1, a drive motor 16 and a variable-speed magnetic transmission device arranged in the inner cavity of the housing 3; the variable-speed magnetic transmission device includes an inner magnetic rotor, an outer magnetic rotor, The spacer 9 and the magnetic adjustment ring 8; the inner magnetic rotor includes an inner magnetic rotor magnet ring 10 and an inner magnetic rotor core 11, and the outer magnetic rotor includes an outer magnetic rotor core 6 and an outer magnetic rotor magnet ring 7. the

The drive motor 16 drives the outer magnetic rotor to rotate through the coupling 15 and the input shaft 13 , and the input shaft 13 is arranged on a bearing inside the end cover 4 .

An outer magnetic rotor core 6 is arranged inside the cup-shaped sleeve 5 of the inner cavity of the housing 3, and the inner wall of the outer magnetic rotor iron core 6 is uniformly arranged on the inner wall of the outer magnetic rotor core 6. 2P ₂ permanent magnetic poles form the outer magnetic rotor magnet ring. 7. That is, there are P ₂ pairs of permanent magnet poles in total, and the polarities of adjacent permanent magnet poles are different, P ₂ is a natural number, and the external magnetic rotor is a cup-shaped rotor.

A magnetic pump impeller 2 is arranged near the end of the pump body 1 on the output rotating shaft 14 supported by a sliding bearing, and one end of the variable speed magnetic transmission device is provided with an inner magnetic rotor core 11 through an inner shaft sleeve 12, and the inner magnetic rotor The outer wall of the iron core 11 has the inner magnetic rotor magnet ring 10 composed of 2P ₁ permanent magnet poles evenly distributed in the circumferential direction, that is, there are P ₁ pairs of permanent magnet poles, and the adjacent permanent magnet poles have different polarities, and P ₁ is a natural number.

Each permanent magnet pole of the inner rotor magnet ring 10 and each permanent magnet pole of the outer rotor magnet ring 7 are each radially magnetized. The inner and outer magnetic rotors have the same center of circle, and both can rotate in forward and reverse directions.

An annular cavity is formed between the outer magnetic rotor magnet ring 7 and the inner magnetic rotor magnet ring 10, and a spacer 9 is arranged in the annular cavity, and the spacer 9 is arranged on the pump body 1 , the magnetic modulation ring 8 is arranged on the spacer 9, and the magnetic modulation ring 8 is formed into a ring body by connecting P ₁ +P ₂ core blocks 801 and P ₁ +P ₂ epoxy blocks 802 at intervals. The magnetic modulation ring 8 makes the rotational speed of the output rotating shaft 14 different from that of the input rotating shaft 13 under magnetic drive by modulating the magnetic fields of the inner magnetic rotor and the outer magnetic rotor, and the ratio between the two is P ₂ : P ₁ , to meet the requirements of different loads, avoiding the electromagnetic interference generated by motor frequency conversion speed regulation.

An inner layer air gap is formed between the inner magnetic rotor and the spacer 9, so that there is no mechanical contact between the inner magnetic rotor and the spacer, and the outer magnetic rotor and the magnetic adjustment ring 8 The outer air gap is formed so that there is no mechanical contact between the outer magnetic rotor and the magnetic adjustment ring 8; since there is no mechanical contact, there is no mechanical wear, no lubrication, high reliability, long life, and avoids mechanical Vibration noise when touched. The spacer sleeve 9 forms a sealed cavity between the inner magnetic rotor and the outer magnetic rotor, and the output shaft 14 and the inner magnetic rotor are sealed in the sealed cavity, which prevents fluid from leaking to the outside , and play the role of cooling the variable speed magnetic transmission device.

The variable-speed magnetic transmission device adopts magnetic drive instead of mechanical gear transmission. When the torque exceeds a certain limit, that is, overload, the variable-speed magnetic transmission device will cut off the transmission relationship at any time, not only the transmission itself will not be damaged, but also the prime mover can be protected.

The above is only a preferred embodiment of the present invention, it should be pointed out that for those of ordinary skill in the art, without departing from the principle of the present invention, some improvements and modifications can also be made, and these improvements and modifications should also be considered Be the protection scope of the present invention.

Claims (5)

1. speed change magnetic drive pump; Comprise the pump housing (1), drive motor (16) and the speed change magnetic drive device that is arranged on housing (3) inner chamber; Said speed change magnetic drive device comprises interior magnet rotor, outer magnet rotor, separation sleeve (9) and adjustable magnetic ring (8); Magnet rotor magnet ring (10) and interior magnet rotor (11) unshakable in one's determination in magnet rotor comprises in said; Said outer magnet rotor comprises outer magnet rotor (6) and outer magnet rotor magnet ring (7) unshakable in one's determination, and said drive motor (16) drives said outer magnet rotor through coupling (15) and said input rotating shaft (13) and rotates, and said input rotating shaft (13) is arranged on the bearing in the end cap (4); Cup-shaped sleeve (5) inboard of said housing (3) inner chamber is provided with an outer magnet rotor (6) unshakable in one's determination, and the inwall of said outer magnet rotor (6) unshakable in one's determination is provided with outer magnet rotor magnet ring (7); One end of the nearly pump housing (1) on output revolving shaft (14) is provided with magnetic drive pump impeller (2); End at the speed change magnetic drive device is provided with an interior magnet rotor (11) unshakable in one's determination through an internal axle sleeve (12); Magnet rotor magnet ring (10) in the outer wall of magnet rotor (11) unshakable in one's determination is provided with in said; It is characterized in that: form an annular chamber between said outer magnet rotor magnet ring (7) and the said interior magnet rotor magnet ring (10); In said annular chamber, be provided with a said separation sleeve (9); Said separation sleeve (9) is connected with the said pump housing (1), on said separation sleeve (9), is provided with said adjustable magnetic ring (8), is used to modulate the magnetic field of said interior magnet rotor and said outer magnet rotor.

2. speed change magnetic drive pump according to claim 1; It is characterized in that: said adjustable magnetic ring (8) connects into annular solid at interval by a plurality of pieces unshakable in one's determination (801) and a plurality of epoxidized block (802); Said adjustable magnetic ring (8) be used to modulate said in magnet rotor, outer magnet rotor magnetic field, make the rotating speed of said output revolving shaft (14) be different from the rotating speed of said input rotating shaft (13).

3. speed change magnetic drive pump according to claim 1 is characterized in that: said outer magnet rotor magnet ring (7) circumferentially is uniformly distributed with the 2P of setting by (6) inwall unshakable in one's determination of magnet rotor outside said ₂Individual permanent magnetism magnetic pole constitutes, and said interior magnet rotor magnet ring (10) circumferentially is uniformly distributed with the 2P of setting by the outer wall of magnet rotor in said (11) unshakable in one's determination ₁Individual permanent magnetism magnetic pole constitutes, and each permanent magnetism magnetic pole of said interior magnet rotor magnet ring (10) and each permanent magnetism magnetic pole of said outer magnet rotor magnet ring (7) be radial magnetizing separately, and adjacent separately permanent magnetism magnetic pole polarity is different, and said adjustable magnetic ring (8) is by P ₁+ P ₂Piece piece (801) unshakable in one's determination and P ₁+ P ₂Piece epoxidized block (802) connects at interval annular solid, said adjustable magnetic ring (8) be used to modulate said in magnet rotor, outer magnet rotor magnetic field, make the rotating speed of said output revolving shaft (14) be different from the rotating speed of said input rotating shaft (13), ratio between two is P ₂: P ₁

4. according to claim 1 or 3 described speed change magnetic drive pumps, it is characterized in that: form the internal layer air gap in said between magnet rotor and the said separation sleeve (9), form outer air gap between said outer magnet rotor and the said adjustable magnetic ring (8); Form Seal cage by said separation sleeve (9) between magnet rotor and the said outer magnet rotor in said, said output revolving shaft (14) and said interior magnet rotor are enclosed in the said Seal cage.

5. speed change magnetic drive pump according to claim 1 and 2 is characterized in that: the two-layer air gap that said adjustable magnetic ring (8) is outside and said separation sleeve (9) is inner is further used for when overload, cutting off at any time drive connection.

Images