CN212063715U - Dynamic sealing device, motor and wind generating set - Google Patents

Abstract

The utility model discloses a dynamic seal device, motor and wind generating set, dynamic seal device includes seal assembly and anti-aging assembly, seal assembly sets up in rotor subassembly and stator module's clearance department, and be used for the clearance between seal assembly and the stator module, anti-aging assembly sets up in seal assembly's periphery side, anti-aging assembly includes the girdle, the girdle radially has the connecting portion that distributes in succession and shields the portion at self, connecting portion connect in one of rotor subassembly and stator module, shield the portion by connecting portion extension to another person in rotor subassembly and the stator module, in order to shield seal assembly. The sealing assembly is shielded through the anti-aging assembly, the sealing assembly is prevented from being directly exposed in the external environment, the aging speed of the sealing assembly can be reduced, the service life of the sealing assembly is prolonged, the cost can be saved, and the sealing reliability of the motor is improved.

Description

Dynamic sealing device, motor and wind generating set

Technical Field

The utility model relates to a sealed technical field of shafting especially relates to a dynamic seal device, motor and wind generating set.

Background

The permanent magnet direct-drive wind driven generator and other motors are large in structure and complex in internal structure, and in order to ensure long-term reliable operation of key components in the motor, such as magnetic steel, windings and the like, the sealing protection level of the motor needs to reach a higher level, and the sealing protection level of IP54 is generally required.

Taking a generator as an example, the sealing reliability of the generator stator and rotor interface is a key influencing the sealing reliability of the whole generator, and for a large-size direct-drive permanent magnet wind generator, the design of a reliable dynamic sealing structure between the stator and the rotor to ensure the sealing reliability of the position has greater difficulty and is more critical.

Shaft system structures such as a general permanent magnet direct-drive wind driven generator and the like are used in severe environments such as the field and the sea, and a dynamic sealing structure is easy to age after being exposed in natural environments for a long time. Therefore, the design of the dynamic sealing structure between the stator and the rotor and the motor adopting the dynamic sealing device, which have high reliability and low cost, has important value.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a move sealing device, motor and wind generating set, this moves sealing device reliability height, it is with low costs.

In one aspect, the utility model provides a dynamic seal device, this dynamic seal device are used for the motor, and the motor includes rotor subassembly and stator module that the rotation each other connects, and dynamic seal device includes: the sealing assembly is arranged at the gap between the rotor assembly and the stator assembly to seal the gap; the anti-aging assembly is arranged on the outer peripheral side of the sealing assembly and comprises an annular belt, the annular belt comprises a connecting part and a shielding part which are distributed in sequence in the radial direction of the annular belt, the connecting part is connected to one of the rotor assembly and the stator assembly, and the shielding part extends from the connecting part to the other one of the rotor assembly and the stator assembly so as to shield the sealing assembly in the radial direction.

According to the first aspect of the embodiment of the present invention, the anti-aging assembly further comprises a sealing portion, the sealing portion is connected to one end of the shielding portion away from the connecting portion, and the sealing portion is in close contact with the other of the rotor assembly and the stator assembly; the connecting part of the annular belt is connected with a rotor end cover of the rotor assembly, and the sealing part is in close contact with a stator support flange of the stator assembly.

According to the utility model discloses an aspect, the sealing is a style of calligraphy in shielding portion and the ascending cross section of connecting portion joint direction, and is formed by shielding portion to the one side extension of keeping away from connecting portion, and the sealing closely laminates with the lateral wall of stator support flange.

According to an aspect of the utility model, the dynamic seal device further includes the elasticity gasket, is fixed in the lateral wall use of stator support flange, and the sealing is used for being connected with the coupling of elasticity gasket.

According to an aspect of the utility model, the seal is V-arrangement in the cross section of shielding portion and connecting portion joint direction, and the seal is including being the first limit portion and the second limit portion that predetermined angle is connected, and first limit portion is connected with shielding portion, and second limit portion butt is in the stator support flange.

According to an aspect of the utility model, the annular area is elastic construction spare, and the sealing part is located the annular area and is formed to extending to one side of keeping away from connecting portion by shielding the portion.

According to the utility model discloses an aspect is equipped with the connection boss on the connecting portion of girdle, connects boss and rotor end cover card and is connected firmly.

According to the utility model discloses an aspect, the girdle is rigid structure spare, and the sealing is elastic structure spare, and the tip that carries on the back mutually with second limit portion junction of first limit portion is provided with the recess, and the one end that the connecting portion were kept away from to the portion of shielding is inserted in the recess and is connected with the sealing is detachable.

According to an aspect of the present invention, the one end of the shielding portion near the connecting portion is provided with a through hole for draining water.

According to one aspect of the present invention, the sealing assembly includes a first sealing member and a second sealing member fitted to each other, one of the first sealing member and the second sealing member is connected to a rotor end cover of the rotor assembly, and the other is flange-connected to a stator bracket of the stator assembly;

the first sealing element is a hand-shaped sealing strip with an opening groove, the second sealing element is a sealing ring, the free end of the sealing ring is inserted into the opening groove, and the edge of the opening groove is bent towards the inner side of the opening and is in close contact with the sealing ring.

On the other hand, the utility model also provides a motor, include: a stator assembly; the rotor component is rotationally connected with the stator component; a dynamic seal as hereinbefore described.

According to the utility model discloses an aspect, seal assembly is connected with the rotor end cover of rotor subassembly including the mutually matched's sealing strip and sealing ring, sealing ring and stator module's stator support flange integrated into one piece.

According to the utility model discloses an aspect, the sealing ring is for including with stator support flange integrated into one piece's body layer and cover in the composite bed structure of the wear-resistant coating on body layer.

According to the utility model discloses an aspect, the rotor end cover is just being equipped with the mounting groove on the terminal surface of stator support flange, and the sealing ring was kept away from to the sealing strip one end card is gone into just bond fixedly with the rotor end cover in the mounting groove.

On the other hand, the utility model also provides a wind generating set, include as before the motor.

The utility model provides a pair of dynamic seal device, motor and wind generating set, dynamic seal device includes seal assembly and anti-aging assembly, seal assembly sets up in rotor subassembly and stator module's clearance department, and is used for the clearance between seal rotor subassembly and the stator module, shields seal assembly through anti-aging assembly, prevents seal assembly direct exposure in external environment, can slow down seal assembly's ageing rate, prolongs seal assembly's life-span, and then can save the cost to improve the sealing reliability of motor.

Drawings

In the following, the drawings required to be used in the embodiments of the present invention will be briefly described, and for those skilled in the art, other drawings can be obtained according to the drawings without any creative effort.

Fig. 1 is a schematic structural diagram of a wind turbine generator system according to an embodiment of the present invention;

FIG. 2 is a schematic axial cross-sectional view of the generator of FIG. 1;

fig. 3 is a partially enlarged schematic view of a dynamic sealing device according to an embodiment of the present invention;

FIG. 4 is an assembled schematic view of an alternative construction of the dynamic seal assembly shown in FIG. 3;

fig. 5 is an assembly schematic view of a dynamic sealing device according to another embodiment of the present invention;

FIG. 6 is another assembled schematic view of the dynamic seal assembly shown in FIG. 5;

FIGS. 7 to 11 are schematic views showing different variations of the sealing portion of the dynamic sealing device shown in FIG. 5;

fig. 12 is an assembly view of a dynamic sealing device according to another embodiment of the present invention;

fig. 13 to 15 are different deformation diagrams of the sealing part of the dynamic sealing device shown in fig. 12.

Description of reference numerals:

1-a tower drum; 2-a cabin; 3, a generator; 4-an impeller;

10-a dynamic sealing device;

11-a sealing assembly; 111-a first seal; 112-a second seal;

12-an anti-aging component; 121-a connecting part; 122-a shielding part; 122 a-a via; 123-a sealing part;

13-elastic sealing piece;

20-a rotor assembly; 21-rotor end cover;

30-a stator assembly; 31-stator support flange.

Detailed Description

The features and exemplary embodiments of various aspects of the present invention will be described in detail below, and in order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not to be construed as limiting the invention, for the purposes of illustrating the principles of the invention. Additionally, the components in the drawings are not necessarily to scale. For example, the dimensions of some of the structures or regions in the figures may be exaggerated relative to other structures or regions to help improve understanding of embodiments of the present invention.

The directional terms appearing in the following description are directions shown in the drawings and do not limit the specific structure of the embodiments of the present invention. In the description of the present invention, it should be noted that, unless otherwise stated, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; may be directly connected or indirectly connected through an intermediate. The specific meaning of the above terms in the present invention can be understood as the case may be, by those of ordinary skill in the art.

Furthermore, the terms "comprises," "comprising," "includes," "including," "has," "having" or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a structure or component comprising a list of elements does not include only those elements but may include other mechanical components not expressly listed or inherent to such structure or component. Without further limitation, an element defined by the phrase "comprising … …" does not exclude the presence of additional like elements in the article or device comprising the element. It will be apparent to one skilled in the art that the present invention may be practiced without some of these specific details. The following description of the embodiments is merely intended to provide a better understanding of the invention by illustrating examples of the invention.

Features and exemplary embodiments of various aspects of the present invention will be described in detail below. Furthermore, the described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.

For better understanding of the present invention, the dynamic seal device, the motor and the wind turbine generator set according to the embodiments of the present invention are described in detail below with reference to fig. 1 to 15.

Referring to fig. 1 and fig. 2 together, fig. 1 is a schematic structural diagram of a wind turbine generator system according to an embodiment of the present invention; fig. 2 is a schematic view of the generator 3 of fig. 1 in an axial cross section.

The embodiment of the utility model provides a wind generating set, including a tower section of thick bamboo 1, set up cabin 2 on a tower section of thick bamboo 1 and generator 3 and impeller 4 that are connected with cabin 2, impeller 4 includes wheel hub and connects the blade on wheel hub, and wheel hub is connected with generator 3, realizes converting wind energy into kinetic energy rethread generator 3 and turns into the electric energy.

The generator 3 comprises a rotor assembly 20 and a stator assembly 30 which are mutually rotationally connected, wherein the rotor assembly 20 is a rotating part, and the stator assembly 30 is a non-rotating part; in order to ensure that the critical components such as magnetic steel and coil windings in the generator 3 can operate reliably for a long time, the dynamic seal device 10 is usually disposed at the junction of the rotor end cover 21 of the rotor assembly 20 and the stator bracket flange 31 of the stator assembly 30.

The above description is made in conjunction with fig. 1 and 2 for convenience of understanding, taking a generator as an example. The following embodiments are not limited to generators, and any electric machine with a rotary connection structure having a rotor, a stator, and other components may be used.

The embodiment of the utility model provides a motor is still provided, this motor includes stator module 30, rotor subassembly 20 and dynamic seal device 10, and wherein, rotor subassembly 20 rotates to be connected in stator module 30, and dynamic seal device 10 is used for the dynamic seal between rotor subassembly 20 and the stator module 30.

The dynamic seal device 10 is connected to the rotor assembly 20 and the stator assembly 30, and can realize reliable sealing at the interface of the rotor assembly 20 and the stator assembly 30 of the motor. It should be noted that the dynamic seal device 10 according to the embodiment of the present invention may be produced and sold separately as an independent component, or may be sold together with a motor as a part of the motor.

Referring to fig. 3, fig. 3 is a partially enlarged schematic view of a dynamic sealing device 10 according to an embodiment of the present invention.

The embodiment of the utility model provides a dynamic seal device 10, including seal assembly 11 and anti-aging assembly 12.

The seal assembly 11 is disposed at a gap between the rotor assembly 20 and the stator assembly 30 to seal the gap. The anti-aging assembly 12 is disposed on the outer periphery of the sealing assembly 11 to prevent the sealing assembly 11 from aging, the anti-aging assembly 12 specifically includes an annular band having a connecting portion 121 and a shielding portion 122 distributed in succession in the radial direction of the annular band, when the anti-aging assembly is assembled and used, the annular band is disposed on the outer periphery of the sealing assembly 11, the connecting portion 121 is connected to one of the rotor assembly 20 and the stator assembly 30, and the shielding portion 122 extends from the connecting portion 121 to the other of the rotor assembly 20 and the stator assembly 30 to shield the sealing assembly 11.

The embodiment of the utility model provides a dynamic seal device 10 shields seal assembly 11 through anti-aging assembly 12, prevents that seal assembly 11 direct exposure from in external environment, can slow down seal assembly 11's ageing speed, prolongs seal assembly 11's life-span, and then can save the cost to improve sealed reliability.

In some alternative embodiments, the sealing assembly 11 may include a first sealing member 111 and a second sealing member 112 that are fitted together, and when the dynamic sealing device 10 is assembled in an electric machine, one of the first sealing member 111 and the second sealing member 112 is connected to the rotor end cover 21 of the rotor assembly 20, and the other is connected to the stator support flange 31 of the stator assembly 30.

Optionally, since the rotor assembly 20 is a rotating component and the stator assembly 30 is a non-rotating component, the first sealing member 111 and the second sealing member 112 will rotate relatively when the sealing assembly 11 is used, and to achieve better sealing performance, one of the first sealing member 111 and the second sealing member 112 is an elastic structural member, and the other is a rigid structural member.

The following embodiments describe the seal assembly 11 by taking the first seal 111 as an elastic structure and connected to the rotor end cover 21 of the rotor assembly 20, and the second seal 112 as a rigid structure and connected to the stator support flange 31 of the stator assembly 30. It will be appreciated that the seal assembly 11 may also be arranged such that the first seal 111 is a resilient structure and is coupled to the stator support flange 31 of the stator assembly 30 and the second seal 112 is a rigid structure and is coupled to the rotor end cap 21 of the rotor assembly 20.

In some optional embodiments, in the sealing assembly 11 provided by the present invention, the first sealing element 111 may be a sealing strip, the second sealing element 112 may be a sealing ring, the sealing strip is an elastic structural member, the sealing ring is a rigid structural member, and the two cooperate to realize better dynamic sealing performance. It will be appreciated that the seal assembly 11 may take on different configurations as long as the sealing requirements between the rotor assembly 20 and the stator assembly 30 are met.

Optionally, the first sealing element 111 is a hand-shaped sealing strip with an open slot, the edge of the open slot is preferably bent towards the inside of the open slot, when the sealing assembly 11 is assembled, the free end of the sealing ring is inserted into the open slot of the hand-shaped sealing strip, the edge of the open slot is in close contact with the sealing ring, and the sealing reliability is high.

In some alternative embodiments, the sealing ring may be integrally formed with the stator support flange 31, specifically, the stator support flange 31 is pre-sized during machining, and the sealing ring is directly machined by machining, which can save materials and machining cost.

After the sealing ring is machined and formed, the wear-resistant coating can be sprayed on the sealing ring, so that the sealing ring is of a composite layer structure comprising a body layer and the wear-resistant coating covering the body layer, the wear-resistant and corrosion-resistant performance of the sealing ring can be improved, and the sealing ring is guaranteed not to lose efficacy after being used for a long time.

Alternatively, the wear-resistant coating may be a ceramic wear-resistant coating.

In some alternative embodiments, the seal is snap fit with the rotor end cover 21. Optionally, an installation boss may be disposed on a side wall of the sealing strip, a step is processed at an end portion of the rotor end cover 21 facing the stator support flange 31, so that the rotor end cover 21 is divided into a main portion and an extension portion extending from the main portion to the stator support flange 31, a mounting groove used in cooperation with the installation boss is disposed on an outer side wall of the extension portion of the rotor end cover 21, and the connection boss on the connection portion 121 is clamped into the mounting groove of the rotor end cover 21 during assembly, so that the sealing strip and the rotor end cover 21 are clamped and connected.

Optionally, in order to reduce the processing steps, when the rotor end cover 21 is processed, a mounting groove of the whole circumference may be milled on the end surface of the rotor end cover 21 facing the stator support flange 31 in a manner that the end surface is recessed inwards, the mounting groove is not communicated with the inner side wall and the outer side wall of the rotor end cover 21, and when the sealing assembly 11 is assembled, one end of the sealing strip, which is far away from the sealing ring, is integrally clamped into the mounting groove.

It can be understood that, in order to make the clamping connection of the sealing strip and the rotor end cover 21 more firm, one end of the sealing strip can be clamped into the mounting groove and fixed with the rotor end cover 21 in an adhesion mode.

In some alternative embodiments, when the anti-aging assembly 12 is assembled for use, the connection portion 121 of the annular band may be connected to the rotor end cover 21 of the rotor assembly 20, and the shielding portion 122 extends from the connection portion 121 toward the stator support flange 31 of the stator assembly 30. It will be appreciated that the attachment portion 121 of the annular band may also be attached to the stator support flange 31 of the stator assembly 30, with the shroud 122 extending from the attachment portion 121 toward the rotor end cap 21 of the rotor assembly 20.

In some alternative embodiments, for convenience of assembly, the connection portion 121 of the anti-aging assembly 12 is connected to the main body portion of the rotor end cover 21, and the sealing strip is connected to the extension portion of the rotor end cover 21, so that the anti-aging assembly 12 is disposed on the outer peripheral side of the sealing assembly 11.

To ensure the shielding effect, the shielding portion 122 of the anti-aging assembly 12 extends at least to the extent that it can shield the aging-susceptible one of the first seal 111 and the second seal 112 of the seal assembly 11.

Optionally, when the shielding portion 122 of the anti-aging assembly 12 extends from the connecting portion 121 to the stator support flange 31 of the stator assembly 30, a projection of one end of the shielding portion 122 away from the connecting portion 121 in the axial direction of the annular belt may overlap with a projection of the stator support flange 31 in the axial direction of the annular belt, so that the anti-aging assembly 12 can completely shield the sealing assembly 11.

In some alternative embodiments, the connecting portion 121 of the annular band and the rotor end cover 21 of the rotor assembly 20 may be connected in a clamping manner, specifically, a connecting boss is provided on the connecting portion 121 of the annular band, a clamping groove used in cooperation with the connecting boss is provided on the rotor end cover 21, the connecting boss on the connecting portion 121 is clamped into the clamping groove on the rotor end cover 21 during assembly, and the connecting portion 121 and the rotor end cover 21 are connected in a clamping manner.

Optionally, a plurality of annular saw teeth may be disposed on the inner circumferential surface and the outer circumferential surface of the connection boss, the free end of the annular saw teeth, which is far away from the connection boss, may be inclined toward the connection portion 121, and the annular saw teeth may improve the reliability of the engagement between the connection portion 121 and the rotor end cover 21, thereby effectively preventing the anti-aging assembly 12 from being detached from the rotor end cover 21 when the rotor assembly 20 rotates.

Optionally, in order to make the connection portion 121 and the rotor end cover 21 clamped more firmly, the connection boss is clamped into the clamping groove and is fixedly bonded with the rotor end cover 21.

It can be understood that the connection manner of the connection portion 121 of the annular band and the rotor end cover 21 of the rotor assembly 20 is not limited to a snap-fit connection, and the connection portion 121 of the annular band and the rotor end cover 21 of the rotor assembly 20 may also be bolted, so that the connection is simple and convenient, and is firm and reliable.

Referring to fig. 4, fig. 4 is an assembly view of another structure of the dynamic sealing device 10 shown in fig. 3.

In some alternative embodiments, a through hole 122a may be formed at an end of the shielding portion 122 of the annular belt close to the connecting portion 121, so as to prevent water from being trapped in a dead space between the annular belt and the rotor end cover 21 when the connecting portion 121 of the annular belt is connected to the rotor assembly 20, and to ventilate the inside of the anti-aging assembly 12, so as to prevent the water from affecting the sealing performance of the sealing assembly 11.

In order to prevent rainwater from entering the position of the sealing assembly 11 from the outside, and since the sealing position is a rotated state, two or more layers of rain blocking members are generally provided so that external rainwater can be prevented from entering at any rotated position. Compare in the protective structure more than current bilayer, the size of the volume of the rainwater that actually gets into has been considered in this application, adopts the ageing-resistant subassembly of individual layer, through set up drainage ventilation's through-hole 121 in the suitable position department of this subassembly, can in time discharge the rainwater that gets into and ventilate and make it dry, effective reduce cost and make the structure simplistic.

Optionally, the shielding portion 122 of the annular belt is provided with a plurality of through holes 122a, and the through holes 122a are distributed on the shielding portion 122 at equal intervals in a ring shape with the center of the annular belt as the center.

Optionally, the through hole 122a is a circular hole to facilitate machining.

Referring to fig. 5 and 6, fig. 5 is an assembly schematic view of a dynamic sealing device 10 according to another embodiment of the present invention; fig. 6 is another assembled view of the dynamic seal 10 of fig. 5.

In some optional embodiments, in order to better shield the sealing assembly 11, the anti-aging assembly 12 may further include a sealing portion 123, the sealing portion 123 is connected to an end of the shielding portion 122 far from the connection portion 121, and the sealing portion 123 is in close contact with the stator bracket flange 31 of the stator assembly 30. It is understood that the connection portion 121 of the annular band may be connected to the stator support flange 31 of the stator assembly 30, and the sealing portion 123 may be in close contact with the rotor end cover 21 of the rotor assembly 20, which is also within the protection scope of the present invention.

Through setting up sealing 123, can guarantee on the one hand that ageing-proof subassembly 12 shields seal assembly 11 completely, on the other hand can make ageing-proof subassembly 12 play the effect of secondary seal rotor subassembly 20 and stator module 30 juncture, can improve the sealing reliability of dynamic seal device 10.

In some alternative embodiments, the sealing portion 123 may be located on the annular band and formed by extending the shielding portion 122 to a side away from the connecting portion 121, that is, the sealing portion 123 is integrally formed with the annular band, and the manufacturing is simple and convenient.

Alternatively, the cross section of the sealing portion 123 in the connection direction of the shielding portion 122 and the connection portion 121 may be a straight line, and when the connection portion 121 of the annular band is connected with the rotor end cover 21 of the rotor assembly 20, the sealing portion 123 may closely fit with the outer side wall of the stator support flange 31 to achieve sealing.

Optionally, the embodiment of the utility model provides a dynamic seal device 10 can also include elastic sealing piece 13, and when anti-aging component 12 was assembled and was used, elastic sealing piece 13 was fixed in stator support flange 31's lateral wall, and the connecting portion 121 of girdle and rotor end cover 21 of rotor subassembly 20 are connected, and sealing portion 123 and elastic sealing piece 13 coupling are connected. The sealing part 123 of the anti-aging assembly 12 can be prevented from directly contacting the stator support flange 31 by arranging the elastic sealing sheet 13, and when the rotor assembly 20 rotates, the rotating friction force can be reduced, and the abrasion of the sealing part 123 and the stator support flange 31 can be reduced.

Optionally, the elastic sealing sheet 13 includes a sponge rubber strip, the thickness of the elastic sealing sheet 13 may be 0.8 to 1.2mm, in addition, the elastic sealing sheet 13 may be fixed on the stator support flange 31 in an adhesive manner, and the elastic sealing sheet 13 may cover the outer side wall and the end face of the stator support flange 31 at the same time.

Referring to fig. 7 to 11, fig. 7 to 11 are schematic views of different variations of the sealing portion of the dynamic sealing device 10 shown in fig. 5.

In some optional embodiments of the dynamic sealing device 10 provided in the present invention, a cross section of the sealing portion 123 in a connecting direction of the shielding portion 122 and the connecting portion 121 may be a V shape, the sealing portion 123 includes a first side portion and a second side portion connected at a predetermined angle, the first side portion is connected with the shielding portion 122, and when the connecting portion 121 of the annular band is connected with the rotor end cover 21 of the rotor assembly 20, the second side portion of the sealing portion 123 abuts against the stator support flange 31, so as to achieve sealing.

Wherein the predetermined angle is 0 ° to 180 °, inclusive of end points, and optionally, the connection angle of the first side portion and the second side portion may be 60 °, 90 °, or 120 °. Of course, the present invention does not specifically limit the connection angle between the first side portion and the second side portion of the sealing portion 123, and can be set according to the actual use requirement.

When the cross section of the sealing portion 123 in the connecting direction between the shielding portion 122 and the connecting portion 121 is V-shaped, the second side portion of the sealing portion 123 comes into contact with the stator holder flange 31 in various specific ways.

Alternatively, referring to fig. 7, the V-shaped opening may face away from the sealing component 11, and the second edge of the sealing portion 123 may abut against the transition between the end surface and the outer sidewall of the stator frame flange 31;

alternatively, referring to fig. 8, the first edge and the second edge may be connected in an arc transition.

Alternatively, referring to fig. 9, the V-shaped opening may be oriented in the radial direction of the annular band, and the joint of the second edge and the first edge of the sealing portion 123 abuts against the end surface of the stator support flange 31;

alternatively, referring to fig. 10, the opening of the V-shape faces the radial direction of the annular band, the joint of the second side portion and the first side portion of the sealing portion 123 abuts against the end surface of the stator support flange 31, and the free end of the second side portion abuts against the second sealing member 112;

alternatively, referring to fig. 11, the V-shaped opening faces the radial direction of the annular band, the end surface of the stator support flange 31 is an inclined surface, and the second edge portion is tightly attached to the end surface of the stator support flange 31.

Referring to fig. 12, fig. 12 is an assembly schematic view of a dynamic sealing device 10 according to another embodiment of the present invention.

In some alternative embodiments, the sealing portion 123 and the annular belt of the anti-aging assembly 12 may be two parts, and the sealing portion 123 is connected to the shielding portion 122 of the annular belt, that is, the sealing portion 123 and the annular belt are manufactured separately and then assembled into a whole.

Alternatively, the cross section of the sealing part 123 in the connecting direction of the shielding part 122 and the connecting part 121 may be V-shaped, the sealing part 123 includes a first side part and a second side part which are connected at a predetermined angle, the first side part is detachably connected with the shielding part 122, and the second side part abuts against the stator support flange 31 to achieve sealing.

Wherein the predetermined angle ranges from 0 ° to 180 °, alternatively, the connection angle of the first side portion and the second side portion may be 60 °, 90 °, or 120 °. Of course, the present invention does not specifically limit the connection angle between the first side portion and the second side portion of the sealing portion 123, and can be set according to the actual use requirement.

Optionally, a groove may be disposed at an end of the first side of the sealing portion 123 opposite to a connection of the second side, and an end of the shielding portion 122 of the annular belt away from the connection portion 121 may be inserted into the groove to be detachably connected to the sealing portion 123.

Alternatively, one end of the shielding portion 122 away from the connecting portion 121 may be inserted into the groove to be bonded with the sealing portion 123.

Alternatively, the second edge of the sealing portion 123 may abut against the transition between the end face and the outer side wall of the stator frame flange 31.

Referring to fig. 13 to 15, fig. 13 to 15 are schematic views of different variations of the sealing portion of the dynamic sealing device 10 shown in fig. 12. When the cross section of the sealing portion 123 in the connecting direction between the shielding portion 122 and the connecting portion 121 is V-shaped, the second side portion of the sealing portion 123 comes into contact with the stator holder flange 31 in various specific ways.

Alternatively, referring to fig. 13, the V-shaped opening may be oriented in the radial direction of the annular band, and the joint of the second edge and the first edge of the sealing portion 123 abuts against the end surface of the stator support flange 31;

alternatively, referring to fig. 14, the opening of the V-shape faces the radial direction of the annular band, the joint of the second side portion and the first side portion of the sealing portion 123 abuts against the end surface of the stator support flange 31, and the free end of the second side portion abuts against the second sealing member 112;

alternatively, referring to fig. 15, the V-shaped opening faces the radial direction of the annular band, the end surface of the stator support flange 31 is an inclined surface, and the second edge portion is tightly attached to the end surface of the stator support flange 31.

The utility model provides a dynamic seal device 10, anti-aging component 12 can adopt the preparation of elasticity material, also can adopt the preparation of rigidity material, and this application does not do specific restriction to this. Optionally, the anti-aging assembly 12 may be made of rubber, glass fiber reinforced plastic, or stainless steel, and is capable of shielding light and water.

In some alternative embodiments, since the stator frame flange 31 is generally a rigid structural member, in order to prevent the sealing portion 123 of the anti-aging assembly 12 from being in rigid contact with the stator frame flange 31, the sealing portion 123 is preferably an elastic structural member, and the second edge of the sealing portion 123 may be tightly abutted against the stator frame flange 31, that is, when the second edge is abutted against the stator frame flange 31, the sealing portion 123 generates a certain compression deformation under the compression action of the stator frame flange 31 on the second edge, which can improve the sealing performance.

Optionally, the annular belt of the anti-aging assembly 12 is made of an elastic material, and the sealing portion 123 may be located on the annular belt and formed by extending the shielding portion 122 to a side away from the connecting portion 121; of course, the sealing portion 123 may be formed separately from the annular band and then integrally connected thereto.

Optionally, the annular band of the anti-aging assembly 12 may be made of a rigid material; when the annular band is a rigid structural member and the sealing portion 123 is an elastic structural member, the sealing portion 123 and the annular band can be connected in a clamping manner.

The present invention may be embodied in other specific forms without departing from its spirit or essential characteristics. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Also, different features that are present in different embodiments may be combined to advantage. Other variations to the disclosed embodiments can be understood and effected by those skilled in the art upon studying the drawings, the specification, and the claims.

Claims (15)

1. A dynamic seal (10) for an electric machine including a rotor assembly (20) and a stator assembly (30) rotationally coupled to each other, the dynamic seal (10) comprising:

a seal assembly (11) disposed at a gap between the rotor assembly (20) and the stator assembly (30) to seal the gap;

an anti-aging assembly (12) disposed at an outer circumferential side of the sealing assembly (11), the anti-aging assembly (12) including an annular band including a connecting portion (121) and a shielding portion (122) distributed one after another in a radial direction of the annular band, the connecting portion (121) being connected to one of the rotor assembly (20) and the stator assembly (30), the shielding portion (122) extending from the connecting portion (121) toward the other one of the rotor assembly (20) and the stator assembly (30) to shield the sealing assembly (11) in the radial direction.

2. The dynamic seal device (10) of claim 1, wherein the anti-aging assembly (12) further comprises a seal portion (123), the seal portion (123) is connected to an end of the shield portion (122) distal from the connecting portion (121), and the seal portion (123) is in intimate contact with the other of the rotor assembly (20) and the stator assembly (30);

the connecting portion (121) of the annular band is connected with a rotor end cover (21) of the rotor assembly (20), and the sealing portion (123) is in close contact with a stator support flange (31) of the stator assembly (30).

3. The dynamic seal device (10) according to claim 2, wherein the cross section of the sealing portion (123) in the connecting direction of the shielding portion (122) and the connecting portion (121) is in a straight shape, the sealing portion (123) is formed by extending the shielding portion (122) to a side away from the connecting portion (121), and the sealing portion (123) is tightly attached to the outer side wall of the stator bracket flange (31).

4. The dynamic sealing device (10) according to claim 3, further comprising an elastic sealing sheet (13) fixed to an outer side wall of the stator frame flange (31) for use, wherein the sealing portion (123) is used for coupling with the elastic sealing sheet (13).

5. The dynamic seal device (10) according to claim 2, wherein the seal portion (123) has a V-shaped cross section in a direction in which the shielding portion (122) is connected to the connecting portion (121), and the seal portion (123) includes a first side portion and a second side portion connected at a predetermined angle, the first side portion being connected to the shielding portion (122), and the second side portion abutting against the stator frame flange (31).

6. The dynamic seal device (10) according to claim 5, wherein the annular band is an elastic structure, and the seal portion (123) is located on the annular band and is formed by extending the shielding portion (122) to a side away from the connecting portion (121).

7. The dynamic seal device (10) according to claim 6, wherein the connecting portion (121) of the annular band is provided with a connecting boss, and the connecting boss is fixedly connected with the rotor end cover (21) in a clamping manner.

8. The dynamic sealing device (10) according to claim 5, wherein the annular band is a rigid structure, the sealing portion (123) is an elastic structure, a groove is provided at an end of the first edge portion opposite to a connection portion of the second edge portion, and an end of the shielding portion (122) away from the connecting portion (121) is inserted into the groove and detachably connected with the sealing portion (123).

9. The dynamic seal device (10) according to claim 1, wherein one end of the shielding portion (122) near the connecting portion (121) is provided with a through hole (122a) for draining water.

10. The dynamic sealing device (10) according to claim 1, characterized in that the sealing assembly (11) comprises a first seal (111) and a second seal (112) fitted to each other, one of the first seal (111) and the second seal (112) being connected with a rotor end cover (21) of the rotor assembly (20) and the other being connected with a stator support flange (31) of the stator assembly (30);

first sealing member (111) is the hand type sealing strip that has the open slot, second sealing member (112) are the sealing ring, the free end of sealing ring inserts in the open slot, the edge of open slot to the opening inboard buckle and with sealing ring in close contact with.

11. An electric machine, comprising:

a stator assembly (30);

a rotor assembly (20) rotationally coupled to the stator assembly (30);

dynamic seal (10) being a dynamic seal (10) according to any of claims 1 to 9.

12. The machine according to claim 11, wherein the sealing assembly (11) comprises a sealing strip and a sealing ring which are matched with each other in a matching way, the sealing strip is connected with a rotor end cover (21) of the rotor assembly (20), and the sealing ring is integrally formed with a stator bracket flange (31) of the stator assembly (30).

13. An electric machine according to claim 12, characterized in that the sealing ring is a composite layer structure comprising a body layer integrally formed with the stator frame flange (31) and a wear resistant coating covering the body layer.

14. The motor according to claim 12, wherein an installation groove is formed in the end face, facing the stator support flange (31), of the rotor end cover (21), and one end, far away from the sealing ring, of the sealing strip is clamped into the installation groove and is fixedly bonded with the rotor end cover (21).

15. A wind park comprising an electrical machine according to any of claims 11 to 14.

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