CN214543824U

CN214543824U - Rotating assembly and turbine motor

Info

Publication number: CN214543824U
Application number: CN202120394624.1U
Authority: CN
Inventors: 钱忠; 赵庆宏; 王珊
Original assignee: Luxshare Electronic Technology Kunshan Ltd
Current assignee: Luxshare Electronic Technology Kunshan Ltd
Priority date: 2021-02-22
Filing date: 2021-02-22
Publication date: 2021-10-29
Anticipated expiration: 2031-02-22

Abstract

The embodiment of the utility model discloses a rotating assembly and a turbine motor, wherein the rotating assembly comprises a rotor, a stator and at least one group of rolling units; the rotor has at least one ring groove; the stator and the rotor are nested with each other, the side wall of the stator is provided with a roller positioning structure, and at least part of the area of the roller positioning structure and the annular groove are arranged oppositely along the circumferential direction of the rotor; the rolling units are in one-to-one correspondence with the annular grooves, each group of rolling units comprises a plurality of rollers, the rollers are movably positioned between the corresponding annular grooves and the roller positioning structures, and the rotors are rotatably connected with the stators through the rollers. The utility model discloses technical scheme can improve the great, the part of size that current rotation connected mode exists, application scope is extensive problem inadequately, has improved the compactedness of runner assembly structure to can be applied to in the device of multiple field and size of a dimension difference.

Description

Rotating assembly and turbine motor

Technical Field

The utility model belongs to the technical field of the motor technique and specifically relates to a rotating assembly and turbo machine.

Background

The rotary connection is a common form of mutual connection of two components, and the bearing is a common rotary connection, and particularly, between two components which need to be coaxially and rotatably connected with each other, the bearing can sufficiently ensure that the two components can stably rotate. However, the size of the whole structure of the rotating assembly is increased to a certain extent by arranging the bearing in the rotating assembly, and meanwhile, the bearing usually has a fixed specification series, can only be matched with a part of a specific model for use, and has a small application range.

SUMMERY OF THE UTILITY MODEL

An object of the embodiment of the utility model is to provide a rotating assembly and turbo machine, compact structure, application scope is wider, can improve the problem that current rotation connected mode exists.

In a first aspect, an embodiment of the present invention provides a rotating assembly, including a rotor, a stator, and at least one set of rolling units; the rotor has at least one ring groove; the stator and the rotor are nested with each other, the side wall of the stator is provided with a roller positioning structure, and at least partial region of the roller positioning structure and the ring groove are arranged oppositely along the circumferential direction of the rotor; the rolling unit with the annular one-to-one, each group the rolling unit includes a plurality of rollers, the roller activity is located the correspondence the annular with between the roller location structure, the rotor passes through the roller with the stator rotates and is connected.

Furthermore, the roller positioning structure comprises at least one group of accommodating units, the accommodating units correspond to the rolling units one by one, each accommodating unit comprises a plurality of accommodating pits, the accommodating pits correspond to the rollers one by one, the accommodating pits are distributed on the side wall of the stator along the circumferential direction, and the rollers are arranged in the corresponding accommodating pits.

Furthermore, the roller positioning structure further comprises a plurality of wire grooves, and the wire grooves extend along the axial direction of the stator and are communicated with the corresponding accommodating sockets.

Further, the roller positioning structure includes a plurality of positioning grooves extending in an axial direction of the stator.

Furthermore, the stator is provided with a first mounting hole extending along the axial direction, the rotor is accommodated in the first mounting hole, and the roller positioning structure is arranged on the inner wall of the stator; or the rotor is provided with a second mounting hole extending along the axial direction, the stator is accommodated in the second mounting hole, and the roller positioning structure is arranged on the outer wall of the stator.

Further, the stator comprises a stator body and a retainer, the retainer and the stator body are nested with each other, the retainer is arranged between the stator body and the rotor, the roller positioning structure is arranged on the retainer, the retainer is provided with a first connecting structure, the stator body is provided with a second connecting structure corresponding to the first connecting structure, and the first connecting structure is connected with the second connecting structure.

Furthermore, the first connecting structure comprises a plurality of positioning holes arranged on the side wall of the retainer, and the second connecting structure comprises a plurality of positioning lugs corresponding to the positioning holes one to one.

Further, the rollers comprise balls and/or rollers.

Further, the rotor comprises a rotor barrel and blades fixed on the inner wall of the rotor barrel, and the ring groove is formed in the outer wall of the rotor barrel.

In a second aspect, embodiments of the present invention further provide a turbine motor, including a rotating assembly according to the first aspect.

The embodiment of the utility model provides a rotating assembly and a turbine motor applying the rotating assembly, wherein the rotating assembly comprises a rotor, a stator and at least one group of rolling units; the rotor has at least one ring groove; the stator and the rotor are nested with each other, the side wall of the stator is provided with a roller positioning structure, and at least part of the area of the roller positioning structure and the annular groove are arranged oppositely along the circumferential direction of the rotor; the rolling units are in one-to-one correspondence with the annular grooves, each group of rolling units comprises a plurality of rollers, the rollers are movably positioned between the corresponding annular grooves and the roller positioning structures, and the rotors are rotatably connected with the stators through the rollers. The utility model discloses technical scheme can improve the great, the part of size that current rotation connected mode exists, application scope is extensive problem inadequately, has improved the compactedness of runner assembly structure to can be applied to in the device of multiple field and size of a dimension difference.

Drawings

The above and other objects, features and advantages of the present invention will become more apparent from the following description of the embodiments of the present invention with reference to the accompanying drawings, in which:

fig. 1 is an exploded view of a rotating assembly according to an embodiment of the present invention;

fig. 2 is a left side view of a rotating assembly of an embodiment of the present invention;

FIG. 3 is a schematic perspective view of a rotor according to an embodiment of the present invention

Fig. 4 is a front view of a rotor of an embodiment of the invention;

fig. 5 is an exploded view of a stator according to an embodiment of the present invention;

FIG. 6 is a schematic view showing the connection relationship between the cage, the roller and the rotor of the rotating assembly according to the embodiment of the present invention;

fig. 7 is a schematic longitudinal sectional view of a rotating assembly according to an embodiment of the present invention;

fig. 8 is a schematic longitudinal sectional view of another rotating assembly according to an embodiment of the present invention;

fig. 9 is a schematic structural diagram of a turbine motor according to an embodiment of the present invention.

Description of reference numerals:

1-a rotor; 11-a rotor drum; 111-ring grooves; 12-a blade;

2-a stator; 21-a stator body; 211-positioning lugs; 212-coil windings; 22-a cage; 221-an accommodating nest; 222-a wire chase; 223-positioning holes; 224-positioning grooves;

3-a roller;

4-shell.

Detailed Description

The present invention will be described below based on examples, but the present invention is not limited to only these examples. In the following detailed description of the present invention, certain specific details are set forth in detail. It will be apparent to those skilled in the art that the present invention may be practiced without these specific details. Well-known methods, procedures, components and circuits have not been described in detail so as not to obscure the present invention.

Further, those of ordinary skill in the art will appreciate that the drawings provided herein are for illustrative purposes and are not necessarily drawn to scale.

Unless the context clearly requires otherwise, throughout the description, the words "comprise", "comprising", and the like are to be construed in an inclusive sense as opposed to an exclusive or exhaustive sense; that is, what is meant is "including, but not limited to".

In the description of the present invention, it is to be understood that 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. In addition, in the description of the present invention, "a plurality" means two or more unless otherwise specified.

Fig. 1 and fig. 2 are an exploded schematic view and a left side view of a rotating assembly according to an embodiment of the present invention. As shown in fig. 1 and 2, the rotating assembly includes a rotor 1, a stator 2, and at least one set of rolling units. The rotor 1 and the stator 2 are nested with each other, and a certain gap is formed between the rotor 1 and the stator 2, so that the rotor 1 and the stator 2 can rotate relatively. Each set of rolling elements comprises a plurality of rollers 3. The roller 3 is supported in the gap between the rotor 1 and the stator 2, and the roller 3 is in rolling contact with the stator 2 and the rotor 1, namely the rotor 1 is in rotary connection with the stator 2 through the roller 3, so that energy loss caused by friction force can be reduced.

The rotor 1 has at least one ring groove 111 on a surface thereof opposite to the stator 2, and the ring groove 111 is used for positioning the roller 3 to prevent the roller 3 from moving in the axial direction of the rotor 1. The rolling units are in one-to-one correspondence with the ring grooves 111, that is, the plurality of rollers 3 of each group of rolling units are all disposed in a corresponding one of the ring grooves 111. The number and size of the rollers 3 can be selected according to the size, weight, etc. of the stator 2 and rotor 1. The side wall of the stator 2 has roller locating formations corresponding to the rollers 3 for locating the rollers 3 in cooperation with the ring grooves 111. The rollers 3 are supported between the ring grooves 111 and corresponding roller locating formations.

The rotor 1 and the stator 2 are nested, the rotor 1 can be sleeved outside the stator 2, the stator 2 can be sleeved outside the rotor 1, and the specific nesting mode can be selected reasonably according to different application scenes of the rotating assembly.

In an alternative embodiment, referring to fig. 1 and 2, the stator 2 has a first mounting hole extending along the axial direction, the diameter of the first mounting hole is larger than that of the rotor 1, the rotor 1 is accommodated in the first mounting hole, that is, the stator 2 is sleeved on the periphery of the rotor 1, and the central axis of the rotor 1 is substantially coincident with the central axis of the first mounting hole; correspondingly, the ring groove 111 is provided on the outer surface of the rotor 1 and the roller positioning structure is provided on the inner wall of the first mounting hole of the stator 2. In another alternative embodiment, the rotor has a second mounting hole extending along the axial direction, the diameter of the second mounting hole is larger than that of the stator, and the stator is accommodated in the second mounting hole, that is, the rotor is sleeved on the periphery of the stator, and the central axis of the second mounting hole is substantially coincident with the central axis of the stator; correspondingly, the roller positioning structure is arranged on the outer wall of the stator, and the ring groove is arranged on the inner wall of the second mounting hole of the rotor.

The structure and principle of the rotating assembly according to the embodiment of the present invention will be described below by taking the example that the stator 2 has the first mounting hole, and the rotor 1 is accommodated in the first mounting hole (i.e. the stator 2 is sleeved outside the rotor 1). It will be readily understood by those skilled in the art that when the rotating assembly is provided in such a manner that the rotor 1 is fitted over the stator 2, the configuration of the components of the rotating assembly should be appropriately adjusted.

Fig. 3 and 4 are a perspective view and a front view of the rotor, respectively. Referring to fig. 3 and 4, the ring groove 111 is provided in the circumferential direction of the rotor 1, and the central axis of the ring groove 111 is coaxial with the central axis (or the rotational axis) of the rotor 1. One or more of the annular grooves 111 may be provided. Preferably, the ring grooves 111 are two or more and arranged at a certain distance in the axial direction of the rotor 1. For example, the rotor 1 in this embodiment includes two ring grooves 111, and the two ring grooves 111 are symmetrically disposed on two sides of the cross section where the center of gravity of the rotor 1 is located, and when the roller 3 is disposed in the ring groove 111, the rotor 1 can be stably supported, which is beneficial to keeping balance of the turbine rotor 1 during rotation and preventing shaking.

The ring groove 111 can axially position the roller 3, and the influence on the normal rotation of the rotor 1 caused by the separation of the roller 3 is avoided. The rollers 3 may be balls, rollers or other shaped rolling bodies. When the rollers 3 are rollers, the axes of the rollers should be kept substantially parallel to the axis of the rotor 1. The diameter of the roller 3 should be properly larger than the clearance between the rotor 1 and the first mounting hole to avoid the roller 3 from falling out or position slippage during the use of the rotating assembly.

The rotor 1 may be provided with a corresponding shape according to different application scenarios, for example, may be provided with a disk shape, a cylinder shape, and the like. In some embodiments, the rotor 1 includes a rotor barrel 11 and blades 12 fixed to an inner wall of the rotor barrel 11, and the ring groove 111 is provided on an outer wall of the rotor barrel 11. The number and shape of the blades 12 can be designed according to the needs of the actual application scenario. The rotor 1 can be driven to rotate by an external force to transport a fluid or driven to rotate by a fluid passing through the rotor to perform work. The rotor 1 may include a rotation shaft disposed at the center for inputting or outputting a torque; of course, the shaft may not be included (as shown in fig. 3 and 4).

Fig. 5 is an exploded view of the stator according to the embodiment of the present invention. Referring to fig. 2 and 5, in some embodiments, the stator 2 includes a stator body 21 and a holder 22, the holder 22 and the stator body 21 are nested with each other, and the holder 22 is disposed between the stator body 21 and the rotor 1. For example, in the present embodiment, the stator main body 21 is fitted over the holder 22. Roller locating formations are provided on the cage 22, the cage 22 being used to locate the rollers 3. The retainer 22 may be cylindrical, the retainer 22 has a first connection structure, the stator body 21 has a second connection structure corresponding to the first connection structure, and the first connection structure and the second connection structure are connected to fixedly connect the retainer 22 and the stator body 21.

In some embodiments, as shown in fig. 5, the first connecting structure includes a plurality of positioning holes 223 disposed on the side wall of the holder 22, and the second connecting structure includes a plurality of positioning protrusions 211 corresponding to the positioning holes 223 one to one. The retainer 22 or the positioning projections 211 are made of a material having a certain deformation capability, and the retainer 22 and the stator main body 21 can be connected and positioned by snapping the positioning projections 211 into the positioning holes 223.

In some embodiments, the first connection structure and the second connection structure may be corresponding external threads and internal threads (not shown), and the retainer 22 and the stator body 21 are connected by screwing.

In some embodiments, the first connecting structure and the second connecting structure may also be magnets (not shown) with corresponding positions and polarities, and the holder 22 and the stator body 21 are connected and positioned by magnetic attraction. The connection mode is suitable for the condition that the influence of the device main body applied to the rotating assembly on the magnetic field is not high, and the connection mode is avoided when the device main body applied to the rotating assembly is sensitive to the change of the magnetic field (for example, the connection mode is provided with a Hall sensor and the like).

Other ways of connecting the holder 22 and the stator body 21 may be used, depending on the requirements of the specific application of the rotating assembly.

At least a partial region of the roller positioning structure is disposed opposite to the ring groove 111 in the radial direction of the rotor 1. That is, the roller-positioning structure has an overlapping portion with the ring groove 111 in projection in the radial direction of the rotor 1. Therefore, the roller positioning structure and the corresponding ring groove 111 limit a certain accommodating space, and the roller 3 is movably positioned in the accommodating space between the corresponding ring groove 111 and the roller positioning structure. In other words, each roller 3 is simultaneously disposed within a corresponding roller locating feature and within a corresponding ring groove 111. At any point in the process of rotating the rotor 1 relative to the stator 2, the rollers 3 are kept in a state where one part is in contact with the ring grooves 111 and the other part is in contact with the roller-positioning structures, whereby the stability of the rotor 1 in rotation can be ensured.

The roller positioning structure comprises at least one group of accommodating units, and the accommodating units correspond to the rolling units one to one. Each group of accommodating units corresponds to one group of rolling units and one ring groove 111 on the rotor 1, and the accommodating units and the corresponding ring grooves 111 are matched together to position the roller 3, so that the roller 3 is prevented from moving or falling off a rotating assembly in the relative rotation process of the rotor 1 and the stator 2.

Fig. 6 is a schematic view of the connection relationship between the retainer, the roller and the rotor, and fig. 7 is a schematic view of a longitudinal section of a rotating assembly according to an embodiment of the present invention, wherein fig. 6 and 7 do not show the rotor body, the section plane of fig. 6 passes through the ring groove 111 and is perpendicular to the central axis of the rotor 1, and the section plane of fig. 7 passes through the central axis of the housing nest and the rotor. Referring to fig. 1-2 and 6-7, in some embodiments, each set of receiving units includes a plurality of receiving pockets 221, and the plurality of receiving pockets 221 are distributed along a side wall of the retainer 22 opposite to the rotor 1 and radially opposite to the corresponding ring groove 111. For example, in the present embodiment, the holder 22 is fitted around the outer periphery of the rotor 1, and the receiving socket 221 is provided on the inner wall of the holder 22. The accommodating pockets 221 are in one-to-one correspondence with the rollers 3, and each roller 3 is disposed in a corresponding one of the accommodating pockets 221. The number of the receiving pockets 221 of each set of receiving units is the same as the number of the rollers 3 of each set of rolling units, for example, each set of rolling units in the present embodiment includes six rollers 3, and there are six receiving pockets 221 of the corresponding set of receiving units.

The shape of the receiving cavity 221 is adapted to the shape of the roller 3 to ensure the roller 3 to rotate normally in the receiving cavity 221, for example, in the embodiment, the roller 3 is a ball, and the receiving cavity 221 may be a hemisphere, a bowl, etc. adapted to the size of the ball. The depth of the receiving socket 221 should take the depth of the ring groove 111 and the diameter of the roller 3 into consideration, so that the roller 3 can contact with the receiving socket 221 and the ring groove 111 at the same time, and the stability of the rotor 1 during rotation is ensured. Optionally, the plurality of receiving pockets 221 are disposed on the inner wall of the first mounting hole of the stator 2 in a centrosymmetric manner, and the rollers 3 are uniformly distributed along the circumferential direction, which is beneficial to ensuring the stability of the rotor 1 during rotation.

Further, the roller positioning structure may further include a plurality of wire grooves 222, and the wire grooves 222 extend in the axial direction of the cage 22 and communicate with the corresponding receiving pockets 221. For example, the slot 222 in this embodiment extends axially along the inner wall of the retainer 22 and communicates with the corresponding receiving pocket 221. The depth of the line groove 222 is slightly smaller than that of the accommodating socket 221, so that the roller 3 in the accommodating socket 221 is prevented from moving to the line groove 222 in the working process of the rotating assembly. The retainer 22 has a certain deformation capability, when assembling, the roller 3 is firstly placed into the corresponding accommodating pocket 221 along the wire slot 222, then the rotor 1 is pushed into the first mounting hole, the retainer 22 deforms to a certain extent to increase the aperture of the first mounting hole, and the rotor 1 can be placed into the first mounting hole, so that the roller 3 is positioned between the corresponding accommodating pocket 221 and the ring groove 111. The locating wire slot 222 may also facilitate viewing of whether the roller 3 is fitted in place.

Or, the retainer 22 may also be made into a split structure divided into multiple segments along the axial direction, the interface of two adjacent segments of the split structure corresponds to the position of the receiving unit, so that each receiving nest 221 is divided into two half bodies, during assembly, the rotor 1 may be first installed in one segment of the retainer 22 and positioned, then the roller 3 is installed between one half body of the receiving nest 221 and the corresponding ring groove 111, and finally the two half bodies of the receiving nest 221 are connected (for example, by welding, bonding, hot-melt connection, etc.), so that the multiple segments of the retainer 22 are sequentially connected to form a whole, and the roller 3 is positioned between the corresponding receiving nest 221 and the ring groove 111. The cage 22 may then be connected to the stator body.

Alternatively, when the rotor 1 and the retainer 22 are assembled, the rotor 1 may be placed in the first mounting hole and offset to one side, so that the plurality of rollers 3 may be placed in the first mounting hole from a position where the gap between the rotor 1 and the first mounting hole is large, and then the rollers 3 may be separated and moved into the receiving pockets 221 corresponding to the retainer 22 by using a tool such as a slender rod.

Of course, the rollers 3 can be fitted between the corresponding receiving pockets 221 and the ring grooves 111 in other possible ways.

Fig. 8 is a schematic longitudinal sectional view of another rotating assembly according to an embodiment of the present invention. As shown in fig. 8, in some embodiments, the rollers 3 are rollers and the roller positioning structure includes a positioning groove 224 extending axially in the side wall of the cage 22. The retainer 22 has a certain deformation capability, and after the rotor 1 is installed in the retainer 22, the rollers can be pushed into the corresponding ring grooves 111 along the positioning grooves 224. The positioning groove 224 can position the rollers in the circumferential direction of the stator 2, and when the axes of the rollers are parallel to the axis of the rotor, the structural characteristics of the rollers can prevent the rollers from moving in the axial direction of the stator 2 to a certain extent, so that the rollers can be well positioned between the stator 2 and the rotor 1.

After the assembly positioning between the roller 3 and the stator 2 and the rotor 1 is completed, blocking covers can be arranged at two ends of the first mounting hole, so that the roller 3 is prevented from falling off. The dimensions of the shield cover should be such that the normal rotation of the rotor 1 is not affected, i.e. there is a certain clearance between the shield cover and the rotor 1.

The rotating assembly can be applied to various use scenes needing to rotatably connect components, such as wheels, turbines, pumps, fans, motors and the like. Preferably, the rotating assembly may be applied in an electric motor. Still further, the rotating assembly in at least some embodiments of the present invention is suitable for use in a turbine motor.

Fig. 9 is a schematic structural diagram of a turbine motor according to an embodiment of the present invention. Referring to fig. 2 and 9, the turbo motor has a housing 4, a rotating assembly is disposed in the housing 4, and a stator 2 is fixedly coupled to the housing 4. The stator 2 of the turbine motor has a first mounting hole in which the rotor 1 is disposed. The rotor 1 is turbine-shaped, and includes a rotor barrel 11 and blades 12 provided in the rotor barrel 11, and the rotor 1 includes magnets arranged in a certain polar arrangement. Referring to fig. 2, the stator 2 includes a plurality of coil windings 212 distributed along the circumferential direction of the rotor 1, and the coil windings 212 are connected to each other by a predetermined connection method (for example, a three-phase motor, a star connection method or a delta connection method may be used). The turbine motor includes a control circuit (not shown in the figure), the control circuit is electrically connected with the coil windings 212, and the control circuit energizes and commutates the corresponding coil windings 212 according to a predetermined sequence, so that a rotating and changing magnetic field is generated in the area where the rotor 1 is located, the rotor 1 is driven to rotate, and mechanical energy is output outwards. The turbine-shaped rotor 1 rotation can be used for conveying a fluid.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included within the protection scope of the present invention.

Claims

1. A rotating assembly, comprising:

a rotor (1) having at least one ring groove (111);

the stator (2) is nested with the rotor (1), the side wall of the stator (2) is provided with a roller positioning structure, and at least partial region of the roller positioning structure is opposite to the ring groove (111) along the radial direction of the rotor (1); and

at least a set of rolling unit, roll the unit with annular (111) one-to-one, each group the rolling unit includes a plurality of rollers (3), roller (3) activity location be in the correspondence annular (111) with between the roller location structure, rotor (1) pass through roller (3) with stator (2) rotate and are connected.

2. The rotating assembly according to claim 1, wherein the roller positioning structure comprises at least one set of receiving units, the receiving units correspond to the rolling units one by one, each receiving unit comprises a plurality of receiving pockets (221), the receiving pockets (221) correspond to the rollers (3) one by one, the receiving pockets (221) are distributed on the side wall of the stator (2) along the circumferential direction, and the rollers (3) are arranged in the corresponding receiving pockets (221).

3. The rotating assembly according to claim 2, characterized in that the roller positioning structure further comprises a plurality of wire slots (222), the wire slots (222) extending in the axial direction of the stator (2) and communicating with the corresponding receiving pockets (221).

4. The rotating assembly according to claim 1, characterized in that the roller positioning structure comprises a plurality of positioning slots (224), the positioning slots (224) extending in the axial direction of the stator (2).

5. The rotating assembly according to claim 1, wherein the stator (2) has a first mounting hole extending in an axial direction, the rotor (1) is received in the first mounting hole, and the roller positioning structure is provided on an inner wall of the stator (2); or,

the rotor (1) is provided with a second mounting hole extending along the axial direction, the stator (2) is accommodated in the second mounting hole, and the roller positioning structure is arranged on the outer wall of the stator (2).

6. The rotating assembly according to claim 1, characterized in that the stator (2) comprises a stator body (21) and a cage (22), the cage (22) and the stator body (21) are arranged nested with each other, the cage (22) is arranged between the stator body (21) and the rotor (1), the roller positioning structure is arranged on the cage (22), the cage (22) has a first connecting structure, the stator body (21) has a second connecting structure corresponding to the first connecting structure, and the first connecting structure is connected with the second connecting structure.

7. The rotating assembly according to claim 6, wherein the first connecting structure comprises a plurality of positioning holes (223) provided on a side wall of the holder (22), and the second connecting structure comprises a plurality of positioning protrusions (211) corresponding to the positioning holes (223) one to one.

8. Rotating assembly according to claim 1, wherein the rollers (3) comprise balls and/or rollers.

9. The rotating assembly according to claim 1, characterized in that the rotor (1) comprises a rotor barrel (11) and blades (12) fixed to the inner wall of the rotor barrel (11), the ring groove (111) being provided on the outer wall of the rotor barrel (11).

10. A turbo-machine comprising a rotating assembly according to any one of claims 1 to 9.