CN106300885B

CN106300885B - A method for reducing eddy current loss of magnetic sealing device

Info

Publication number: CN106300885B
Application number: CN201610812565.9A
Authority: CN
Inventors: 杨小龙; 孙浩祥; 蒋云磊
Original assignee: Guangxi University of Science and Technology
Current assignee: Guangxi University of Science and Technology
Priority date: 2016-09-09
Filing date: 2016-09-09
Publication date: 2019-04-26
Anticipated expiration: 2036-09-09
Also published as: CN106300885A

Abstract

The present invention discloses a kind of method for reducing magnetic sealing device eddy-current loss, applies the end-surface type magnetic sealing device such as flowering structure, including power rotor, driven rotor, separation sleeve, permanent magnet I, permanent magnet II, permanent magnet III, permanent magnet IV；Separation sleeve is set between power rotor and the end face of driven rotor；Annular groove A and annular groove B is set on the end face of power rotor；Annular groove C and annular groove D is set on the end face of driven rotor；Annular groove A and annular groove C is corresponding, and annular groove B and annular groove D are corresponding；Permanent magnet I is installed in annular groove A, permanent magnet II is installed in annular groove B, permanent magnet III is installed in annular groove C, permanent magnet IV is installed in annular groove D.The present invention solves the problems, such as in magnetic seal that vortex generates this that heat demagnetizes so as to cause permanent magnet, while also greatly reducing eddy-current loss, enhances the effect of magnetic seal, and increase transmitting torque.

Description

A method of reducing magnetic sealing device eddy-current loss

Technical field

The present invention relates to mechanical engineering technical field of sealing technology more particularly to a kind of reduce magnetic sealing device eddy-current loss Method.

Background technique

Magnetic seal is also known as magnetic coupling, it is to realize the non-contact of torque using the permanent magnet principle that there is a natural attraction between the sexes Formula transmitting, metal separation sleeve may be implemented to be absolutely sealed, therefore magnetic seal has " zero leakage " and reduces vibration and noise etc. Advantage.But when the metal separation sleeve in end-surface type magnetic seal works in alternating magnetic field, generate the same of eddy current loss When, the temperature meeting rapid increase of separation sleeve will lead to magnet rotor when the temperature is excessively high and demagnetization occur so that magnetic seal can not be just Often work.Therefore solve the problems, such as that eddy-current loss has great importance in end-surface type magnetic seal.

Separation sleeve eddy-current loss is by being generated by its magnetic flux change, and existing mode is to reduce wall thickness to reduce magnetic It is vortexed the generation of heat, or end Eddy Distribution is improved by separation sleeve fluting non-homogeneous in the axial direction etc., but can not be from essence Upper reduction eddy-current loss.

Summary of the invention

The purpose of the present invention is to provide a kind of methods for reducing magnetic sealing device eddy-current loss, utilize electromagnetic induction Magnetic opposite permanent magnet is arranged in characteristic on the circumferencial direction of seal face, solves vortex in magnetic seal and generates heat So as to cause this problem of permanent magnet demagnetization, while eddy-current loss is also greatly reduced, enhances the effect of magnetic seal, And increase transmitting torque.

Technical scheme is as follows:

The method of reduction magnetic sealing device eddy-current loss of the invention, applies the end-surface type magnetic seal such as flowering structure Device, including power rotor, driven rotor, separation sleeve, permanent magnet I, permanent magnet II, permanent magnet III, permanent magnet IV, it is described Power rotor and driven rotor are disc structure, and the end face of power rotor and driven rotor is opposite to be arranged in parallel；The isolation Be sheathed between power rotor and the end face of driven rotor, it is parallel with the end face of power rotor and driven rotor, power rotor and Gap is respectively kept between the end face and separation sleeve of driven rotor；

Setting annular groove A and annular groove B in interval on the end face of the power rotor；The end of the driven rotor Setting annular groove C and annular groove D in interval on face；The annular groove A and annular groove C is corresponded to each other, the ring Connected in star B and annular groove D is corresponded to each other；Permanent magnet I is installed in the annular groove A, permanent magnet is installed in annular groove B Permanent magnet III is installed in II, annular groove C, permanent magnet IV is installed in annular groove D；

The permanent magnet I is contrary with the magnetic line of force of permanent magnet II；The magnetic of the permanent magnet III and permanent magnet IV The line of force is contrary；The permanent magnet I is contrary with the magnetic line of force of permanent magnet III；The permanent magnet II and permanent magnet The magnetic line of force of IV is contrary；

The following steps are included:

The power rotor rotation, permanent magnet I, permanent magnet II follow power rotor to rotate synchronously, since permanent magnet I inhales Draw permanent magnet III, permanent magnet II attracts permanent magnet IV, so that generating magnetic force attracts thrust, drives permanent magnet III, permanent magnet IV And then drive driven rotor that permanent magnet I, permanent magnet II is followed to rotate；

At this point, separation sleeve cutting magnetic induction line movement generate induced current, separation sleeve cut permanent magnet I and permanent magnet III it Between the magnetic line of force when generated faradic direction and its cut the magnetic line of force when institute between permanent magnet II and permanent magnet IV What is generated is faradic contrary, cancels out each other between these reversed induced currents, to effectively reduce eddy-current loss.

Axis hole is respectively set in the middle part of the power rotor and driven rotor.

The annular groove A and annular groove B is coaxial with power rotor；Annular groove C, the annular groove D It is coaxial with driven rotor.

The internal diameter of the annular groove A is greater than the outer diameter of annular groove B, and the internal diameter of the annular groove C is greater than ring The outer diameter of connected in star D.

The permanent magnet I, permanent magnet II, permanent magnet III, permanent magnet IV are to be spliced by the permanent magnet of muti-piece split-type Made of annulus bodily form permanent magnet, the permanent magnet I is coaxial with power rotor, the width of the width of permanent magnet I and annular groove A Degree is consistent, and height is less than or equal to the depth of annular groove A；The permanent magnet II is coaxial with power rotor, permanent magnet II Width and annular groove B width always, height be less than or equal to annular groove B depth；The permanent magnet III with Driven rotor is coaxial, and the width of permanent magnet III and the equivalent width of annular groove C, height is less than or equal to annular groove C's Depth；The permanent magnet IV is coaxial with driven rotor, the width of permanent magnet IV and the equivalent width of annular groove C, height Less than or equal to the depth of annular groove D.

The permanent magnet I, permanent magnet II, permanent magnet III, the quantity of permanent magnet IV are equal, the even number between 2-40.

Gap between the end face and separation sleeve of the power rotor and between the end face and separation sleeve of driven rotor Gap is equidistant, and is 0.1 ~ 5mm.

The permanent magnet is axial charging type permanent magnet.

The invention has the benefit that

The present invention on the end face of sealing device power rotor and driven rotor by being respectively set two circle permanent magnets, actively Inner ring permanent magnet is with outer ring permanent magnet magnetism on the contrary, inner ring permanent magnet and outer ring permanent magnet magnetism phase on driven rotor on rotor Instead, permanent magnet and on power rotor with permanent magnet magnetism on corresponding driven rotor on the contrary, using electromagnetic induction characteristic, Separation sleeve cutting magnetic induction line generates backward current and cancels out each other, to reduce eddy-current loss, solves and is vortexed production in magnetic seal This problem that heat amount is demagnetized so as to cause permanent magnet, enhances the effect of magnetic seal, and increases transmitting torque.

Detailed description of the invention

Fig. 1 is structural schematic diagram when magnetic sealing device of the invention is not loaded into permanent magnet

Fig. 2 is the structural schematic diagram that magnetic sealing device of the invention is packed into after permanent magnet

Fig. 3 is the partial cutaway view of magnetic sealing device of the invention

Each serial number and title are as follows in figure:

1- power rotor；2- driven rotor；3- separation sleeve；4- permanent magnet；5- axis hole；

11- annular groove A；12- annular groove B；

21- annular groove C；22- annular groove D；

41- permanent magnet I；42- permanent magnet II；43- permanent magnet III；44- permanent magnet IV；.

Specific embodiment

Below by specific embodiment, the present invention is described in detail.

Embodiment 1

The method of reduction magnetic sealing device eddy-current loss of the invention, applies the end-surface type magnetic seal such as flowering structure Device, including power rotor 1, driven rotor 2, separation sleeve 3, permanent magnet I41, permanent magnet II42, permanent magnet III43, permanent magnet IV44, the power rotor 1 and driven rotor 2 are disc structure, and power rotor 1 and the end face of driven rotor 2 are relatively parallel Setting；The separation sleeve 3 is set between power rotor 1 and the end face of driven rotor 2, with power rotor 1 and driven rotor 2 End face is parallel, is respectively kept with gap between the end face and separation sleeve 3 of power rotor 1 and driven rotor 2；

Setting annular groove A11 and annular groove B12 in interval on the end face of the power rotor 1；The slave turn Setting annular groove C21 and annular groove D22 in interval on the end face of son 2；The annular groove A11 and annular groove C21 phase Mutually corresponding, the annular groove B12 and annular groove D22 are corresponded to each other；Permanent magnet is installed in the annular groove A11 Permanent magnet II42 is installed in I41, annular groove B12, permanent magnet III43, peace in annular groove D22 are installed in annular groove C21 Fill permanent magnet IV44；

The permanent magnet I41 is contrary with the magnetic line of force of permanent magnet II42；The permanent magnet III43 and permanent magnet The magnetic line of force of IV44 is contrary；The permanent magnet I41 is contrary with the magnetic line of force of permanent magnet III43；The permanent magnetism Body II42 is contrary with the magnetic line of force of permanent magnet IV44；

The following steps are included:

The power rotor 1 rotates, and permanent magnet I41, permanent magnet II42 follow power rotor 1 to rotate synchronously, due to forever Magnet I41 attracts permanent magnet III43, permanent magnet II42 to attract permanent magnet IV44, so that generating magnetic force attracts thrust, drives permanent magnetism Body III43, permanent magnet IV44 and then and then permanent magnet I41, permanent magnet the II42 rotation of drive driven rotor 2；

At this point, the movement of 3 cutting magnetic induction line of separation sleeve generates induced current, separation sleeve 3 cuts permanent magnet I41 and permanent magnet When the magnetic line of force between III43 generated faradic direction and its cut between permanent magnet II42 and permanent magnet IV44 It is generated faradic contrary when the magnetic line of force, it cancels out each other between these reversed induced currents, to effectively subtract Few eddy-current loss.

Axis hole 5 is respectively set in the middle part of the power rotor 1 and driven rotor 2.

The annular groove A11 and annular groove B12 is coaxial with power rotor 1；The annular groove C21, ring Connected in star D22 is coaxial with driven rotor 2.

The internal diameter of the annular groove A11 is greater than the outer diameter of annular groove B12, the internal diameter of the annular groove C21 Greater than the outer diameter of annular groove D22.

The permanent magnet I41, permanent magnet II42, permanent magnet III43, permanent magnet IV44 be by muti-piece split-type forever The annulus bodily form permanent magnet that magnet is spliced, the permanent magnet I41 is coaxial with power rotor 1, the width of permanent magnet I41 with The equivalent width of annular groove A11, height are less than or equal to the depth of annular groove A11；The permanent magnet II42 and master Turn is 1 coaxial, and always, height is less than or equal to annular groove to the width of the width of permanent magnet II42 and annular groove B12 The depth of B12；The permanent magnet III43 is coaxial with driven rotor 2, the width of permanent magnet III43 and the width of annular groove C21 Degree is consistent, and height is less than or equal to the depth of annular groove C21；The permanent magnet IV44 is coaxial with driven rotor 2, permanent magnetism The width of body IV44 and the equivalent width of annular groove C21, height are less than or equal to the depth of annular groove D22.

The permanent magnet I41, permanent magnet II42, permanent magnet III43, the quantity of permanent magnet IV44 are equal, be 2-40 it Between even number.

The end face in gap and driven rotor 2 between the end face and separation sleeve 3 of the power rotor 1 and separation sleeve 3 it Between gap be equidistant, be 0.1 ~ 5mm.

The permanent magnet 4 is axial charging type permanent magnet.

Claims

1. a method for reducing the eddy current loss of a magnetic sealing device, is characterized in that,

An end face magnetic sealing device with the following structure is applied: including a driving rotor (1), a driven rotor (2), a spacer (3), permanent magnet I (41), permanent magnet II (42), permanent magnet III (43) ), permanent magnet IV (44), the active rotor (1) and the driven rotor (2) are disc structures, and the end faces of the active rotor (1) and the driven rotor (2) are relatively parallel; The spacer (3) is arranged between the end faces of the active rotor (1) and the driven rotor (2), and is parallel to the end faces of the active rotor (1) and the driven rotor (2). There are gaps between the end face of (2) and the isolation sleeve (3);

An annular groove A (11) and an annular groove B (12) are arranged at intervals on the end face of the active rotor (1); annular grooves C (21) are arranged at intervals on the end face of the driven rotor (2). and the annular groove D (22); the annular groove A (11) and the annular groove C (21) correspond to each other, and the annular groove B (12) and the annular groove D (22) correspond to each other The permanent magnet I (41) is installed in the annular groove A (11), the permanent magnet II (42) is installed in the annular groove B (12), and the permanent magnet III (43) is installed in the annular groove C (21). ), the permanent magnet IV (44) is installed in the annular groove D (22);

The direction of the magnetic field lines of the permanent magnet I (41) is opposite to that of the permanent magnet II (42); the direction of the magnetic field lines of the permanent magnet III (43) is opposite to that of the permanent magnet IV (44); the permanent magnet I (41) ) is opposite to the direction of the magnetic field lines of the permanent magnet III (43); the direction of the magnetic field lines of the permanent magnet II (42) is opposite to that of the permanent magnet IV (44);

Include the following steps:

The active rotor (1) rotates, and the permanent magnet I (41) and the permanent magnet II (42) follow the active rotor (1) to rotate synchronously. Since the permanent magnet I (41) attracts the permanent magnet III (43), the permanent magnet II (42) Attract permanent magnet IV (44), thereby generating magnetic attraction thrust, driving permanent magnet III (43), permanent magnet IV (44) and then driving driven rotor (2) to follow permanent magnet I (41), permanent magnet II (42) turn;

At this time, the motion of the isolation sleeve (3) cutting the magnetic field lines generates an induced current, and the direction of the induced current generated when the isolation sleeve (3) cuts the magnetic field lines between the permanent magnet I (41) and the permanent magnet III (43) is the same as the direction of the cutting The directions of the induced currents generated when the magnetic lines of force between the permanent magnet II (42) and the permanent magnet IV (44) are opposite, and these opposite induced currents cancel each other, thereby effectively reducing the eddy current loss.

2 . The method for reducing eddy current loss of a magnetic sealing device according to claim 1 , wherein shaft holes ( 5 ) are respectively provided in the middle of the active rotor ( 1 ) and the driven rotor ( 2 ). 3 .

3. The method for reducing eddy current loss of a magnetic sealing device according to claim 1, wherein the annular groove A (11) and the annular groove B (12) are coaxial with the active rotor (1); The annular groove C (21) and annular groove D (22) are coaxial with the driven rotor (2).

4. The method for reducing eddy current loss of a magnetic sealing device according to claim 1, wherein the inner diameter of the annular groove A (11) is larger than the outer diameter of the annular groove B (12), and the annular groove A (11) has an inner diameter greater than that of the annular groove B (12). The inner diameter of groove C (21) is larger than the outer diameter of annular groove D (22).

5 . The method for reducing eddy current loss of a magnetic sealing device according to claim 1 , wherein the permanent magnet I ( 41 ), permanent magnet II ( 42 ), permanent magnet III ( 43 ), permanent magnet IV ( 44) All are torus-shaped permanent magnets spliced by a plurality of split permanent magnets, the permanent magnet I (41) is coaxial with the active rotor (1), and the width of the permanent magnet I (41) is the same as The width of the annular groove A (11) is the same, and its height is less than or equal to the depth of the annular groove A (11); the permanent magnet II (42) is coaxial with the active rotor (1), and the permanent magnet II (42) The width is consistent with the width of the annular groove B (12), and its height is less than or equal to the depth of the annular groove B (12); the permanent magnet III (43) is coaxial with the driven rotor (2), the permanent magnet The width of III (43) is consistent with the width of the annular groove C (21), and its height is less than or equal to the depth of the annular groove C (21); the permanent magnet IV (44) and the driven rotor (2) share the same The width of the shaft, the permanent magnet IV (44) is consistent with the width of the annular groove C (21), and its height is less than or equal to the depth of the annular groove D (22).

6 . The method for reducing eddy current loss of a magnetic sealing device according to claim 1 , wherein the permanent magnet I ( 41 ), permanent magnet II ( 42 ), permanent magnet III ( 43 ), permanent magnet IV ( 44) are equal in number, an even number between 2-40.

7. The method for reducing eddy current loss of a magnetic sealing device according to claim 1, characterized in that: the gap between the end face of the active rotor (1) and the spacer (3) and the gap between the driven rotor (2) The gap distance between the end face and the spacer sleeve (3) is equal, and both are 0.1~5mm.

8 . The method for reducing eddy current loss of a magnetic sealing device according to claim 1 , wherein the permanent magnet I ( 41 ), permanent magnet II ( 42 ), permanent magnet III ( 43 ), permanent magnet IV ( 44) is an axially magnetized permanent magnet.