CN2242540Y

CN2242540Y - Magnetic shaft coupling

Info

Publication number: CN2242540Y
Application number: CN 95234471
Authority: CN
Inventors: 聂镜源; 丛立山; 陈建波; 赵丕侠; 刘明军
Original assignee: RONGCHENG CITY SUBMERSIBLE MOTOR FACTORY
Current assignee: RONGCHENG CITY SUBMERSIBLE MOTOR FACTORY
Priority date: 1995-08-08
Filing date: 1995-08-08
Publication date: 1996-12-11
Anticipated expiration: 2005-08-08

Abstract

The utility model relates to a shaft coupling, more specifically a magnetic shaft coupling without shaft leakage. Due to the adoption of a hollow output shaft and a sealing ring, the utility model utilizes working liquid to carry out circulating cooling to bearings. Capillary pipes are arranged in a working cavity and an inner rotor cavity to ensure that the inner rotor cavity is always in a low pressure state. As a result, the utility model has the advantages of wide range of use, long service life, low cost, small size, and large transferring force moment and is especially suitable for working occasions requiring no shaft leakage.

Description

Magnetic coupling

The utility model relates to shaft coupling, specifically a kind of magnetic coupling that does not have the axle leakage.

As everyone knows, magnetic coupling is by procapsid, back casing, output shaft, internal rotor, inner magnet, external rotor, outer magnet, spacer, thrust button, bearing, bearing bracket stand is formed, bearing pedestal is separated out working chamber and internal rotor chamber with the inner chamber of magnetic coupling, output shaft is on the bearing pedestal of Bearing Installation at procapsid, be respectively equipped with inner magnet and outer magnet on internal rotor and the external rotor, internal rotor is installed on the output shaft through nut, spacer is isolated internal rotor and external rotor fully, its periphery is installed between procapsid and the back casing, procapsid is connected by screw with back casing, during use, external rotor is connected with motor output shaft, output is coupling and the supporting plant equipment of motor, when the motor rotation, the rotation of drive outer magnet, spacer adopts non-magnet material to make, because the coupling in magnetic field, internal rotor rotates with it, output shaft is also with the plant equipment rotation supporting with it, because spacer is isolated internal rotor and external rotor fully, motor and supporting plant equipment are also isolated fully, and reaching does not have the purpose that axle leaks.The pressure in the working chamber of this magnetic coupling and internal rotor chamber equates or approximately equal, if the big thickness that just needs to increase spacer of pressure, the permanent magnet consumption is increased, cost rises, volume increases, carry-over moment is little, so this magnetic coupling can only match with the plant equipment of low pressure, and has deficiencies such as bearing, spacer is fragile, useful life is short.

The purpose of this utility model just is to overcome the deficiencies in the prior art, provides that a kind of scope of application is wide, long service life, cost is low, volume is little, carry-over moment is big magnetic coupling.

For achieving the above object, feature of the present utility model is that output shaft is a hollow shaft, and bearing pedestal is provided with sealing ring, and the output shaft of sealing ring side correspondence is provided with radial hole, and working chamber is connected by capillary with the internal rotor chamber.

The utility model is owing to adopt hollow output shaft, sealing ring, make it utilize working solution to the bearing cooling that circulates, be provided with capillary at working chamber and internal rotor chamber, make the internal rotor chamber be in low-pressure state all the time, so have advantages such as the scope of application is big, long service life, cost is low, volume is little, carry-over moment is big.

Description of drawings:

Accompanying drawing is a structural representation of the present utility model, also is the schematic diagram of embodiment.

Fig. 1 is the schematic diagram of the utility model embodiment 1;

Fig. 2 is the schematic diagram of the utility model embodiment 2.

Mark among the figure; Procapsid 1, thrust button 2, bearing 3, bearing pedestal 4, output shaft 5, internal rotor 6, inner magnet 7, external rotor 8, outer magnet 9, back casing 10, spacer 11, motor flange 12, motor output shaft 1, working chamber 14, internal rotor chamber 15, centre bore 16, sealing ring 17, screw 18, nut 19, radial hole 20, capillary 21.

Below in conjunction with accompanying drawing embodiment of the present utility model is described further:

Embodiment 1: as shown in Figure 1, output shaft 5 is a hollow shaft, promptly be provided with φ 5.8mm through hole in the axle center, through thrust button 2, sealing ring 17, bearing 3 is installed on the bearing pedestal 4 of procapsid 1, bearing 3 adopts resistance to wear P23 type phenolic plastics injection moulding preferably, between sealing ring 17 both sides and the bearing 3 on the corresponding output shaft 5, on same section, be provided with trisection radial hole 20 respectively, radial hole 20 is φ 3mm, radial hole 20 is connected with centre bore 16, be respectively equipped with inner magnet 7 and outer magnet 9 on internal rotor 6 and the external rotor 8, internal rotor 6 and external rotor 8 adopt electrical pure iron to make, inner magnet 7 and outer magnet 9 adopt Nd-Fe-B rare earth permanent magnetic material, internal rotor 6 is installed on the output shaft 5 through nut 19, bearing pedestal 4 is separated out working chamber 14 and internal rotor chamber 15 with the inner chamber of magnetic coupling, working chamber 14 is connected by capillary 21 with internal rotor chamber 15, spacer 11 adopts non-magnet material to make, it can be stainless steel, also can be that the highstrenghtpiston makes, spacer 11 is isolated internal rotor 6 and external rotor 8 fully, its periphery is pressed against between procapsid 1 and the back casing 10, and procapsid 1 is fixedlyed connected by screw 18 with back casing 10.During use, external rotor 8 is connected with motor output shaft 13, back casing 10 is connected with motor flange 12, the supporting plant equipment of output shaft and motor is connected, when the motor rotation, drive external rotor 8, outer magnet 9 rotations, because the coupling in magnetic field, inner magnet 7, internal rotor 6 is with its rotation, output shaft 5 is also with the plant equipment rotation supporting with it, sealing ring 17 is connected with bearing bracket stand 4, the medium at sealing ring 17 places is flowed to centre bore 16 places by radial hole 20 under action of centrifugal force, working chamber 14 belongs to high pressure chest, but output shaft 5 places then are in low-pressure area, because working chamber 14 is provided with pore 21 with internal rotor chamber 15, the high pressure of working chamber 14 makes internal rotor chamber 15 have rated pressure after pore 21 decompressions, force the medium in the internal rotor chamber 15 to flow by the output of the centre bore on the output shaft 5 16 to output shaft 5, the medium that flows is to bearing 3 cooling that circulates, the rated pressure in internal rotor chamber 15 is determined by the length and the thickness of pore 20, spacer 11 is not damaged, it is wide to the utlity model has the scope of application, long service life, cost is low, volume is little, the advantage that carry-over moment is big is specially adapted to require not have the workplace that axle leaks.

Embodiment 2: as shown in Figure 2, output shaft 5 is a hollow shaft, promptly be provided with φ 5.8mm through hole in the axle center, through thrust button 2, sealing ring 17, bearing 3 is installed on the bearing pedestal 4 of procapsid 1, bearing 3 adopts resistance to wear P23 type phenolic plastics injection moulding preferably, same section on the output shaft 5 of sealing ring 17 1 side correspondences is provided with quartering radial hole 20, radial hole 20 is φ 3mm, radial hole 20 is connected with centre bore 16, be respectively equipped with inner magnet 7 and outer magnet 9 on internal rotor 6 and the external rotor 8, internal rotor 6 and external rotor 8 adopt electrical pure iron to make, inner magnet 7 and outer magnet 9 adopt Nd-Fe-B rare earth permanent magnetic material, internal rotor 6 is installed on the output shaft 5 through nut 19, bearing bracket stand 4 is separated out working chamber 14 and internal rotor chamber 15 with the inner chamber of magnetic coupling, working chamber 14 is connected with internal rotor chamber 15 by capillary 21, spacer 11 adopts non-magnet material to make, it can be stainless steel, also can be that the highstrenghtpiston makes, spacer 11 is isolated internal rotor 6 and external rotor 8 fully, its periphery is pressed against between procapsid 1 and the back casing 10, and procapsid 1 is fixedlyed connected by screw 18 with back casing 10.During use, external rotor 8 is connected with motor output shaft 13, back casing 10 is connected with motor flange 12, the supporting plant equipment of output shaft 5 and motor is connected, when the motor rotation, drive external rotor 8, outer magnet 9 rotations, because the coupling in magnetic field, inner magnet 7, internal rotor 6 is with its rotation, output shaft 5 is also with the plant equipment rotation supporting with it, sealing ring 17 is connected with bearing bracket stand 4, the medium at sealing ring 17 places is flowed to centre bore 16 places by radial hole 20 under action of centrifugal force, working chamber 14 belongs to high pressure chest, but output shaft 5 places then are in low-pressure area, owing to be provided with capillary 21 between working chamber 14 and the internal rotor chamber 15, the high pressure of working chamber 14 makes internal rotor chamber 15 have rated pressure after capillary 22 decompressions, force the medium in the internal rotor chamber 15 to flow by the output of the centre bore on the output shaft 5 16 to output shaft 5, the medium that flows is to bearing 3 cooling that circulates, the rated pressure in internal rotor chamber 15 is determined by the length and the thickness of capillary 21, spacer 11 is not damaged, it is wide to the utlity model has the scope of application, long service life, cost is low, volume is little, the advantage that carry-over moment is big is specially adapted to require not have the workplace that axle leaks.

Claims

1, a kind of magnetic coupling, be provided with procapsid, back casing, output shaft, internal rotor, inner magnet, external rotor, outer magnet, spacer, thrust button, bearing, bearing pedestal, it is characterized in that output shaft is a hollow shaft, bearing pedestal is provided with sealing ring, the output shaft of sealing ring side correspondence is provided with radial hole, and working chamber is connected by capillary with the internal rotor chamber.