CN219802086U - Permanent magnet coupler and transmission system - Google Patents

Abstract

The utility model belongs to the technical field of permanent magnet driving, and particularly relates to a permanent magnet coupler and a transmission system. In the permanent magnet coupler, after the external wind source enters the accommodating cavity along the air inlet channel, the external wind source can spirally move around the outside of the guide cylinder, so that wind is blown into the vent hole of the rotor in the permanent magnet assembly. Because the external wind source is the helix at the in-process that moves around the guide cylinder, consequently when blowing to the rotor, external wind source can blow to in a plurality of ventilation holes in the rotor as far as possible evenly to make the heat dissipation of rotor more even, reduce the rotor and lead to the risk of demagnetizing because of being heated unevenly. Furthermore, the utility model also provides a transmission system.

Description

Permanent magnet coupler and transmission system

Technical Field

The utility model belongs to the technical field of permanent magnet driving, and particularly relates to a permanent magnet coupler and a transmission system.

Background

The existing air-cooled permanent magnet coupler has the heat dissipation mode that the heat dissipation fins or the heat dissipation blades are arranged on the outer end face of the conductor rotor, and when the conductor rotor rotates, the heat dissipation fins or the heat dissipation blades are driven to exchange heat with air, so that the heat dissipation of the conductor rotor is realized. At present, the air-cooled permanent magnet coupler is generally applied to high rotating speed, for example, the rotating speed is 1000 rpm-3000 rpm, which can be regarded as high rotating speed, and the high rotating speed can be utilized to realize heat dissipation of the conductor rotor.

The low rotation speed requirement of the permanent magnet coupler, such as 0 rpm-100 rpm when the permanent magnet coupler is used in extraction equipment, is difficult to realize self-heat dissipation of the high rotation speed permanent magnet coupler due to low rotation speed.

Disclosure of Invention

The utility model aims to provide a permanent magnet coupler, wherein an air inlet channel and an air outlet channel are respectively arranged on a shell of the permanent magnet coupler, so that the permanent magnet coupler can be cooled by means of an external air source. Meanwhile, the permanent magnet coupler is further provided with the guide cylinder, and after the external wind source enters the accommodating cavity along the air inlet channel, the wind source air flow can spirally move around the guide cylinder and blow to the permanent magnet assembly under the guidance of the guide cylinder so as to ensure that the heat dissipation of the permanent magnet assembly is uniform.

Another object of the present utility model is to provide a transfer system comprising the permanent magnet coupler.

According to an embodiment of the utility model, there is provided a permanent magnet coupler comprising:

the permanent magnet assembly comprises a rotor, wherein the rotor is provided with a plurality of through ventilation holes extending along the axial direction of the rotor;

the shell comprises two ends which are communicated with each other and an accommodating cavity, the accommodating cavity is used for accommodating the permanent magnet assembly, the shell is provided with an air inlet channel and an air outlet channel which are respectively communicated with the accommodating cavity and the outer space of the shell, and the air inlet channel is used for being communicated with an external air source;

the first end cover and the second end cover are respectively arranged at two ends of the shell, the first end cover is located close to the air inlet side of the vent hole, the second end cover is located close to the air outlet side of the vent hole, the first end cover is provided with a guide cylinder facing the rotor, the axis of the guide cylinder coincides with the axis of the rotor, air flow entering the accommodating cavity through the air inlet channel forms spiral air flow around the outer wall of the guide cylinder, and the spiral air flow moves to the vent hole of the rotor along the outer wall of the guide cylinder.

In an embodiment, the guide cylinder comprises a transition section which moves the spiral air flow along the outer wall to the vent hole of the rotor, the cross-sectional area of the transition section gradually decreases towards the rotor direction or the transition section is arc-shaped.

In an embodiment, the air inlet channel is opposite to the accommodating cavity and corresponds to the transition section; in the vertical direction, the distance between one side of the air inlet channel close to the transition section and one side of the transition section facing the rotor is not smaller than zero.

In an embodiment, the guide cylinder further comprises an extension section, the extension section is arranged at one end of the transition section, which is close to the rotor, and the cross-sectional area of the extension section along the axis direction of the rotor is unchanged.

In an embodiment, in the axial direction of the rotor, the ratio of the length of the extension section to the length of the transition section is 1:2 to 1:6.

in one embodiment, the plurality of ventilation holes sequentially form a multi-layer annular array around the axis of the rotor, and one end of the guide cylinder, which is close to the rotor, is positioned at the innermost layer of the multi-layer annular array; and/or the air outlet of the air outlet channel is provided with a dust cover.

In one embodiment, a heat dissipation pipe is arranged in the vent hole; and/or the number of the ventilation holes is 216.

In an embodiment, the heat dissipation tube is made of copper.

In an embodiment, a sealing assembly is arranged between the shell and the permanent magnet assembly, the sealing assembly comprises annular sealing teeth arranged at intervals, the annular sealing teeth are arranged on the inner side of the shell, and the annular sealing teeth are in clearance fit with the permanent magnet assembly.

According to an embodiment of the utility model, a second aspect provides a transmission system comprising a permanent magnet coupler according to any one of the preceding claims.

In the permanent magnet coupler, after the external wind source enters the accommodating cavity along the air inlet channel, the external wind source can spirally move around the outside of the guide cylinder, and air flow is blown into the vent hole of the rotor in the permanent magnet assembly through the guide of the guide cylinder. Because the wind regime air current is the helix at the in-process of moving around the guide cylinder, and the air current evenly encircles the guide cylinder and removes to the rotor promptly, consequently when blowing to the rotor, the wind regime air current can blow to in a plurality of ventilation holes in the rotor as far as possible evenly to make the heat dissipation of rotor more even, reduce the rotor because of the risk of being heated uneven demagnetization. Furthermore, the utility model also provides a transmission system.

Drawings

FIG. 1 is an exploded view of a permanent magnet coupler according to an embodiment of the present utility model;

FIG. 2 is an enlarged schematic view of a portion of FIG. 1;

FIG. 3 is a schematic diagram of a guide cylinder according to an embodiment of the present utility model;

FIG. 4 is a cross-sectional view of a permanent magnet coupler in an embodiment of the utility model;

fig. 5 is a partially enlarged schematic view at B in fig. 4.

Reference numerals illustrate:

100. a permanent magnet assembly; 110. a rotor; 111. a vent hole;

200. a housing; 210. a housing chamber; 220. an air inlet channel; 230. an air outlet channel;

231. a dust cover;

300. a first end cap; 310. a guide cylinder; 311. a transition section; 312. an extension section;

400. a second end cap;

500. a seal assembly; 510. annular seal teeth.

Detailed Description

The present utility model will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present utility model more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the utility model.

It should be noted that the illustrations provided in the present embodiment are merely schematic illustrations of the basic idea of the present utility model.

The structures, proportions, sizes, etc. shown in the drawings attached hereto are for illustration purposes only and should not be construed as limiting the utility model to the extent that it can be practiced, since modifications, changes in the proportions, or otherwise, used in the practice of the utility model, are particularly adapted to the specific details of construction and the use of the utility model, without departing from the spirit or essential characteristics thereof, which fall within the scope of the utility model as defined by the appended claims.

References in this specification to orientations or positional relationships as "upper", "lower", "left", "right", "intermediate", "longitudinal", "transverse", "horizontal", "inner", "outer", "radial", "circumferential", etc., are based on the orientation or positional relationships shown in the drawings, are also for convenience of description only, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore are not to be construed as limiting the utility model. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

As described in the background, the existing air-cooled permanent magnet coupler has a heat dissipation mode that a heat dissipation fin or a heat dissipation blade is arranged on the outer end face of a conductor rotor, and when the conductor rotor rotates, the heat dissipation fin or the heat dissipation blade is driven to exchange heat with air, so that heat dissipation of the conductor rotor is realized. At present, the air-cooled permanent magnet coupler is generally applied to high rotating speed, for example, the rotating speed is 1000 rpm-3000 rpm, which can be regarded as high rotating speed, and the high rotating speed can be utilized to realize heat dissipation of the conductor rotor. The low rotation speed requirement of the permanent magnet coupler, such as 0 rpm-100 rpm when the permanent magnet coupler is used in extraction equipment, is difficult to realize self-heat dissipation of the high rotation speed permanent magnet coupler due to low rotation speed. In order to solve the problem, researchers have proposed a permanent magnet coupler, which is provided with an air inlet channel and an air outlet channel on a housing of the permanent magnet coupler, so that an external air source enters the interior of the permanent magnet coupler from the air inlet channel, thereby solving the heat dissipation problem of the low-rotation speed permanent magnet coupler. Furthermore, the utility model also provides a transmission system comprising the permanent magnet coupler, and the transmission system can realize torque transmission through the permanent magnet coupler.

Referring to fig. 1, fig. 1 is an exploded view of a permanent magnet coupler according to an embodiment of the present utility model. The permanent magnet coupler in this embodiment includes: the permanent magnet assembly 100, the housing 200, and the first and second end caps 300 and 400, wherein the housing 200 is configured to house the permanent magnet assembly 100; the first end cap 300 and the second end cap 400 are used to seal both ends of the housing 200 together, while the first end cap 300 may also be used to carry an input shaft and the second end cap 400 may also be used to carry an output shaft.

In this embodiment, the air inlet channel 220 and the air outlet channel 230 are respectively arranged on the housing 200, so that the air source in the outside can enter the interior of the housing 200 along the air inlet channel 220 to dissipate heat of the permanent magnet assembly 100, and finally is discharged from the air outlet channel 230, thereby solving the heat dissipation problem of the permanent magnet coupler with low rotation speed. In order to solve the problem of uniform heat dissipation of the permanent magnet coupler, the first end cover 300 in the permanent magnet coupler in this embodiment is provided with a guide tube 310, and the guide tube 310 can make the external wind source blow to the permanent magnet assembly 100 as uniformly as possible. It should be noted that, when the heat dissipation of the permanent magnetic assembly 100 in the permanent magnetic coupler is uneven, the heat dissipation of the permanent magnetic assembly 100 is not synchronous, which may cause the risk of demagnetization of the permanent magnetic assembly 100.

Specifically, referring to fig. 1 and 2, the permanent magnet assembly 100 includes a rotor 110, wherein the rotor 110 is provided with a plurality of through ventilation holes 111 extending in an axial direction of the rotor 110.

The housing 200 includes two mutually communicated ends and a housing cavity 210, wherein the housing cavity 210 is used for housing the permanent magnet assembly 100, and the housing 200 is provided with an air inlet channel 220 and an air outlet channel 230 which are respectively communicated with the housing cavity 210 and an external space of the housing 200.

The first end cover 300 and the second end cover 400 are respectively disposed at two ends of the housing 200, the first end cover 300 is located at an air inlet side near the ventilation hole 111, the second end cover 400 is located at an air outlet side near the ventilation hole 111, the first end cover 300 is provided with a guide cylinder 310 facing the rotor 110, an axis of the guide cylinder 310 coincides with an axis of the rotor 110, an air flow entering the accommodating cavity 210 from the air inlet channel 220 forms a spiral air flow around an outer wall of the guide cylinder 310, and the spiral air flow moves to the ventilation hole 111 of the rotor 110 along the outer wall of the guide cylinder 310.

In this embodiment, when the permanent magnet coupler works, the external wind source enters the accommodating cavity 210 of the housing 200 from the air inlet channel 220, and the direction indicated by arrow a in fig. 1 can be referred to, and the wind source moves spirally around the guide tube 310 disposed on the first end cover 300 after entering the housing 200, and the direction indicated by arrow b in fig. 1 can be referred to. Since the moving track of the wind source is a spiral line, the wind source can enter different ventilation holes 111 of the rotor 110 uniformly when moving close to the rotor 110, so as to cool the rotor 110, and the direction indicated by arrow c in fig. 1 can be referred to. In this process, the wind source can cool different areas of the rotor 110 as uniformly as possible, so that the demagnetization risk caused by uneven heat dissipation of the rotor 110 can be avoided well. The wind source finally flows out of the wind outlet passage 230 after passing through the ventilation hole 111 of the rotor 110.

In this embodiment, the air inlet channel 220 and the air outlet channel 230 are disposed on the housing 200, and after the external air source enters the accommodating cavity 210 of the housing 200 from the air inlet channel 220, the external air source blows to the rotor 110 in a spiral moving manner around the guide cylinder 310, so that the heat dissipation of the rotor 110 is more uniform.

Further, in one embodiment, referring to fig. 2 and 3, the guide 310 includes a transition section 311, the transition section 311 allows the spiral air flow to move along the outer wall of the guide 310 to the vent hole of the rotor 110, the cross-sectional area of the transition section 311 gradually decreases toward the rotor 110, or the transition section 311 is arc-shaped.

In the present embodiment, when the transition section 311 is provided in the guide 310, the air flow flowing out of the air inlet passage 220 can rotate around the transition section 311, thereby forming an air flow flowing around the outer wall of the guide 310. For this purpose, in the present embodiment the transition piece 311 may be of a structure in which the cross-sectional area gradually decreases gradually towards the rotor 110 or the transition piece 311 may be circular arc-shaped, and in addition, when the transition piece 311 is circular arc-shaped, the energy loss when the air flow flows over the transition piece 311 is smaller than, for example, a cone shape.

Further, in an embodiment, the air inlet 220 is opposite to the accommodating cavity 210 and corresponds to the transition section 311; in the vertical direction, the distance between the side of the air inlet channel 220 near the transition section 311 and the side of the transition section 311 facing the rotor 110 is not less than zero.

In this embodiment, when the air inlet channel 220 faces the accommodating cavity 210, the flow direction of the wind source entering the accommodating cavity 210 is perpendicular to the accommodating cavity 210, that is, the wind source entering the accommodating cavity 210 is perpendicular to the axial direction of the rotor 110. Since the guide cylinder 310 is provided with the transition section 311 corresponding to the air inlet channel 220, and the cross-sectional area of the transition section 311 is gradually reduced, in the vertical direction, the distance between the side of the air inlet channel 220 close to the transition section 311 and the side of the transition section 311 facing the rotor 110 is not less than zero, i.e. in the vertical direction, the air inlet of the air inlet channel 220 is integrally positioned above the side of the transition section 311 facing the rotor 110; or the whole transition section 311 is positioned below one side of the rotor 110, so that after the wind source enters the shell 200, the wind source can flow tangentially to the surface of the transition section 311, and meanwhile, the wind source can rotate around the surface of the transition section 311, because the wind source airflow continuously enters the shell 200, the pressure on one side of the guide cylinder 310 is higher than that on one side of the rotor 110, and the transition section 311 of the guide cylinder 310 can guide the airflow close to the outer wall of the transition section 311 to move towards the rotor 110, the wind source airflow can perform spiral movement around the guide cylinder 310 towards the rotor 110, and the transition section 311 at the guide cylinder 310 can also better reduce the energy loss of the wind source when flowing on the guide cylinder 310.

It should be noted that, in the vertical direction, when the distance between the side of the air inlet channel 220 near the transition section 311 and the side of the transition section 311 facing the rotor 110 is zero, the flow direction of the air source flowing out of the air inlet channel 220 may be understood as being tangential to the transition section 311 of the guide cylinder 310. Of course, when considering the manufacturing process, the distance between the side of the air inlet passage 220 near the transition section 311 and the side of the transition section 311 facing the rotor 110 is greater than zero in the vertical direction. When the distance between the two is smaller than zero, that is, the extending direction of the outlet of the air inlet channel 220 intersects the guide cylinder 310, a wind source in the opposite direction is generated on the guide cylinder 310, which affects the energy loss of the wind source.

On the other hand, the air inlet channel 220 can be opposite to the accommodating cavity 210 when being arranged on the shell 200, so that the length dimension of the permanent magnet coupler in the axial direction can be reduced, the position installation of the actual permanent magnet coupler in a factory is facilitated, and the installation space is saved.

In an embodiment, referring to fig. 3, the guide cylinder 310 further includes an extension section 312, where the extension section 312 is disposed at an end of the transition section 311 near the rotor 110, and a cross-sectional area of the extension section 312 along the axial direction is unchanged. The extension 312 in this embodiment can make the rotation radius of the wind source airflow when the wind source airflow moves the same before the wind source airflow moves to the rotor 110, so that the radiating area is more fixed when the wind source airflow blows to the rotor 110. When the rotation radius of the wind source is different, that is, when the cross-sectional area of the end of the guide tube 310 near the rotor 110 is greatly changed, the wind moving from the guide tube 310 to the rotor 110 may be divergently transferred, and when the cross-sectional areas of the extension sections 312 are the same, the wind moving from the guide tube 310 to the rotor 110 may tend to be parallel transferred, and the latter may make the radiation area of the wind when the wind blows to the rotor 110 the same, and the cooling effect is relatively better.

Specifically, the length of extension 312 is not easily oversized, and when extension 312 is oversized, it may cause the wind source to rotate on the cross-section of the same extension 312, thereby affecting the transfer of the wind source along extension 312 to rotor 110. In the axial direction of the rotor 110, the ratio of the length of the extension section 312 to the length of the transition section 311 may be 1:2 to 1:6.

in one embodiment, referring to fig. 2, the plurality of ventilation holes 111 sequentially form a multi-layered annular array around the axis of the rotor 110, wherein an end of the guide tube 310 near the rotor 110 is located at an innermost layer of the multi-layered annular array. In addition, a dust cover 231 may be further disposed at the air outlet of the air outlet passage 230.

In this embodiment, when the plurality of ventilation holes 111 are arrayed in sequence around the axis of the rotor 110, as shown in fig. 3, C1 may represent the outermost layer formed by the array, C2 may represent the innermost layer formed by the array, and the end of the guide cylinder near the rotor 110 is located at the innermost layer, which has the advantage that more ventilation holes 111 can radiate when blowing from the guide cylinder to the ventilation holes 111 in the rotor 110, thereby achieving better heat dissipation effect.

In one embodiment, a heat dissipation pipe is disposed in the ventilation hole 111; and/or the number of vent holes 111 is 216. In this embodiment, heat in the permanent magnet assembly 100 can be transferred to the heat dissipation pipe, the heat dissipation pipe has higher heat conduction efficiency, and when the wind source flows through the heat dissipation pipe, more heat can be taken away, so that the heat dissipation effect of the permanent magnet coupler is further improved. The heat dissipation pipe may be copper, but the material of the heat dissipation pipe is not limited thereto, and may be other materials with better heat conduction efficiency.

In addition, the number of the ventilation holes 111 may be set according to the actual size of the rotor 110 and the heat dissipation requirement.

In one embodiment, referring to fig. 4 and 5, a seal assembly 500 is disposed between the housing 200 and the permanent magnet assembly 100, wherein the seal assembly 500 includes annular seal teeth 510 disposed at intervals, the annular seal teeth 510 are disposed on the inner side of the housing 200, and the annular seal teeth 510 are in clearance fit with the permanent magnet assembly 100.

In the present embodiment, the annular seal teeth 510 are in clearance fit with the permanent magnet assembly 100, which can reduce friction between the permanent magnet assembly 100 and the permanent magnet assembly 100 during rotation; on the other hand, the effect of the labyrinth seal can be created when the wind source blows against the gap between the annular seal teeth 510 and the permanent magnet assembly 100, thereby reducing the outflow of wind source from the gap between the housing 200 and the permanent magnet assembly 100.

The utility model also proposes a transmission system comprising a permanent-magnet coupler as mentioned above.

The technical features of the above embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.

The foregoing examples illustrate only a few embodiments of the utility model, which are described in detail and are not to be construed as limiting the scope of the utility model. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the utility model, which are all within the scope of the utility model. Accordingly, the scope of protection of the present utility model is to be determined by the appended claims.

Claims (10)

1. A permanent magnet coupler, comprising:

a permanent magnet assembly (100) comprising a rotor (110), the rotor (110) being provided with a plurality of through ventilation holes (111) extending in the axial direction of the rotor (110);

the shell (200) comprises two ends which are communicated with each other and a containing cavity (210), the containing cavity (210) is used for containing the permanent magnet assembly (100), the shell (200) is provided with an air inlet channel (220) and an air outlet channel (230) which are respectively communicated with the containing cavity (210) and the external space of the shell (200), and the air inlet channel (220) is used for being communicated with an external air source;

first end cover (300) and second end cover (400) set up respectively in the both ends of casing (200), first end cover (300) are located and are close to the air inlet side of ventilation hole (111), second end cover (400) are located and are close to the air-out side of ventilation hole (111), first end cover (300) are provided with towards guide cylinder (310) of rotor (110), the axis of guide cylinder (310) with the axis coincidence of rotor (110), by air inlet channel (220) get into the air current of acceping chamber (210) is around the outer wall of guide cylinder (310) forms the spiral air current, just the spiral air current is followed the outer wall of guide cylinder (310) is removed to ventilation hole (111) of rotor (110).

2. The permanent magnet coupler according to claim 1, wherein: the guide cylinder (310) comprises a transition section (311), the transition section (311) enables the spiral airflow to move to the vent hole (111) of the rotor (110) along the outer wall of the guide cylinder (310), the cross section area of the transition section (311) gradually decreases towards the direction of the rotor (110) or the transition section (311) is arc-shaped.

3. The permanent magnet coupler according to claim 2, wherein: the air inlet channel (220) is opposite to the accommodating cavity (210) and corresponds to the transition section (311); in the vertical direction, the distance between the side of the air inlet channel (220) close to the transition section (311) and the side of the transition section (311) facing the rotor (110) is not smaller than zero.

4. The permanent magnet coupler according to claim 2, wherein: the guide cylinder (310) further comprises an extension section (312), the extension section (312) is arranged at one end, close to the rotor (110), of the transition section (311), and the cross-sectional area of the extension section (312) along the axis direction of the rotor (110) is unchanged.

5. The permanent magnet coupler according to claim 4, wherein: in the axial direction of the rotor (110), the ratio of the length of the extension section (312) to the length of the transition section (311) is 1:2 to 1:6.

6. the permanent magnet coupler according to claim 1, wherein: the plurality of ventilation holes (111) sequentially form a multi-layer annular array around the axis of the rotor (110), and one end of the guide cylinder (310) close to the rotor (110) is positioned at the innermost layer of the multi-layer annular array; and/or, a dust cover (231) is arranged at the air outlet of the air outlet channel (230).

7. The permanent magnet coupler according to claim 6, wherein: a heat dissipation pipe fitting is arranged in the ventilation hole (111); and/or the number of the ventilation holes (111) is 216.

8. The permanent magnet coupler according to claim 7, wherein: the heat dissipation pipe fitting is made of copper.

9. The permanent magnet coupler according to claim 1, wherein: a sealing assembly (500) is arranged between the shell (200) and the permanent magnet assembly (100), the sealing assembly (500) comprises annular sealing teeth (510) which are arranged at intervals, the annular sealing teeth (510) are arranged on the inner side of the shell (200), and the annular sealing teeth (510) are in clearance fit with the permanent magnet assembly (100).

10. A transmission system comprising a permanent magnet coupler according to any one of claims 1 to 9.