CN217977112U

CN217977112U - Rotating speed stabilizing device, compressor and refrigerator

Info

Publication number: CN217977112U
Application number: CN202221574632.5U
Authority: CN
Inventors: 李伟; 文翔; 石成志; 陈可; 廖熠
Original assignee: Gree Electric Appliances Inc of Zhuhai
Current assignee: Gree Electric Appliances Inc of Zhuhai
Priority date: 2022-06-21
Filing date: 2022-06-21
Publication date: 2022-12-06
Anticipated expiration: 2032-06-21

Abstract

The utility model provides a rotational speed stabilising arrangement, compressor and refrigerator, rotational speed stabilising arrangement includes: a counterweight; and the connecting piece is used for being connected with the rotor of the compressor, has a connecting state connected with the counterweight and a separating state separated from the counterweight, and is switchably arranged between the connecting state and the separating state. The utility model discloses a rotational speed stabilising arrangement has solved the lower problem of rotational speed stability of the drive assembly in the compressor among the prior art.

Description

Rotating speed stabilizing device, compressor and refrigerator

Technical Field

The utility model relates to a compressor technical field particularly, relates to a rotational speed stabilising arrangement, compressor and refrigerator.

Background

With the rapid development of economy, the household refrigerator is widely applied, and with the improvement of the requirements on environmental protection, energy conservation and the like, the requirements on the compressor in the refrigeration system are more strict, and the compressor gradually develops towards a wide frequency conversion range, miniaturization and high efficiency.

At present, domestic refrigerator mainly adopts small-size reciprocating compressor, and its self has unbalanced reciprocal inertial force, and when whole core, including the miniaturized back of shafting subassembly, its vibration can crescent, especially during low frequency work, even the motor increases torque compensation, nevertheless reduces along with the frequency, and the core descends to intermittent load's bearing capacity, and rotational speed stability is lower, causes the core striking casing, seriously influences customer experience and compressor's life.

SUMMERY OF THE UTILITY MODEL

A primary object of the utility model is to provide a rotational speed stabilising arrangement, compressor and refrigerator to solve the lower problem of rotational speed stability of the drive assembly in the compressor among the prior art.

In order to achieve the above object, according to an aspect of the present invention, there is provided a rotation speed stabilizing device, including: a counterweight; and the connecting piece is used for being connected with the rotor of the compressor, has a connecting state connected with the counterweight and a separating state separated from the counterweight, and is switchably arranged between the connecting state and the separating state.

Further, the connector includes: a connecting portion; the first end of the elastic piece is used for being connected with the rotor, and the second end of the elastic piece is connected with the connecting part; the elastic member extends in a radial direction of the rotor; when the rotating speed of the rotor is less than the preset rotating speed, the connecting part is connected with the counterweight under the action of the elastic part; when the rotating speed of the rotor is greater than or equal to the preset rotating speed, the connecting part compresses the elastic part to move along the radial direction of the rotor towards the direction far away from the counterweight part so as to be separated from the counterweight part.

Further, the connecting piece still includes: connecting body for be connected with the rotor, the last mounting groove that is provided with of connecting body, the at least part setting of elastic component is in the mounting groove, and the first end and the connecting body of elastic component are connected.

Further, the connecting part comprises a first connecting part and a second connecting part connected with the first connecting part; the mounting groove comprises a first groove body and a second groove body communicated with the first groove body; the second end of the elastic piece is connected with the first end of the first connecting part, and the elastic piece and the first connecting part are movably arranged in the first groove body; the first end of the second connecting part is connected with the second end of the first connecting part, and the second connecting part is arranged in the second groove body in a penetrating mode so that the second end of the second connecting part is connected with the counterweight piece when the connecting piece is in a connecting state.

Furthermore, the counterweight comprises a counterweight main body and a fluted disc connected with the counterweight main body, and a plurality of connecting tooth parts of the fluted disc are arranged at intervals along the circumferential direction of the fluted disc to form a plurality of concave parts; when the connecting piece is in the connecting state, at least part of the connecting part is inserted in the concave part.

Furthermore, the connecting piece is arranged around the fluted disc and is used for being arranged between the counterweight main body and the rotor, and the connecting piece comprises a plurality of pairs of connecting parts and elastic pieces which are arranged in pairs; the connecting parts and the concave parts are arranged in one-to-one correspondence, and when the connecting parts are in a connecting state, at least parts of the connecting parts are inserted into the corresponding concave parts.

Furthermore, the connecting tooth part is provided with a first tooth flank and a second tooth flank which are oppositely arranged along the circumferential direction of the fluted disc, and the connecting tooth part is provided with a tooth crest; the first end of the tooth top surface is in arc transition connection with the first end of the first tooth side surface, the second end of the tooth top surface is connected with the second tooth side surface, and the second end of the first tooth side surface is in arc transition connection with the bottom of the concave part; and/or the second flank is planar.

Further, the counterweight main body is of a first annular structure, and the top of the counterweight main body is provided with a conical surface; the counterweight body is disposed around at least a portion of a bracket of the compressor with a flow gap therebetween.

Further, the rotational speed stabilizing device further includes: the fixing ring is used for being fixedly connected with a bracket of the compressor; and a bearing assembly disposed around the retaining ring, the bearing assembly being disposed between the retaining ring and the counterweight.

According to the utility model discloses an on the other hand provides a compressor, including rotor and bent axle subassembly, the rotor rotationally sets up to drive the rotation of bent axle subassembly, the compressor still includes foretell rotational speed stabilising arrangement, and rotational speed stabilising arrangement's connecting piece is connected with the rotor.

According to another aspect of the present invention, there is provided a refrigerator including the above compressor.

The utility model discloses a rotational speed stabilising arrangement includes counterweight and connecting piece, the connecting piece is used for being connected with the rotor of compressor, the connecting piece has the connected state of being connected with the counterweight and the detached state of separating with the counterweight, the connecting piece switchably sets up between connected state and detached state, thus, when compressor low frequency operation, can make the connecting piece be in connected state, because the quality of counterweight is great, can store rotational kinetic energy, can resist the rotational speed change of rotor, the effectual rotational speed fluctuation of rotor when low-speed rotation that has reduced makes the rotary motion of the drive assembly of compressor more smooth and stable, reduce the vibration and the noise of core, improve user experience; when the compressor runs at high frequency, the connecting piece can be in a separated state, and the counterweight does not rotate together with the rotor, so that the power loss of the counterweight is not increased, and the COP of the compressor is not influenced.

Drawings

The accompanying drawings, which form a part of the present application, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and not to limit the invention. In the drawings:

fig. 1 shows a schematic view of a connection piece of a rotational speed stabilization device according to the invention;

fig. 2 shows an axonometric view of a connecting piece of the rotational speed stabilizing device according to the invention;

fig. 3 shows a perspective view of a top view of a counterweight of a rotational speed stabilizing device according to the invention;

fig. 4 shows an axonometric view of the bottom view of the counterweight of the speed stabilizer according to the invention;

fig. 5 shows a cross-sectional view of an embodiment of a rotational speed stabilizing device according to the invention;

figure 6 shows a cross-sectional view from a top view of an embodiment of a compressor according to the present invention;

fig. 7 shows a cross-sectional view from a front view of an embodiment of a compressor according to the present invention;

fig. 8 shows a partial enlarged view of fig. 6 according to the present invention.

Wherein the figures include the following reference numerals:

10. a counterweight; 11. a counterweight main body; 12. a fluted disc; 13. a connecting tooth portion; 14. a recessed portion; 15. a first flank face; 16. a second flank; 17. tooth crest; 18. a conical surface; 20. a connecting member; 21. a connecting portion; 211. a first connection portion; 212. a second connecting portion; 22. an elastic member; 23. a connecting body; 24. mounting grooves; 241. a first tank body; 242. a second tank body; 30. a rotor; 40. a support; 50. a fixing ring; 60. a bearing assembly; 70. a crankshaft assembly;

1. a housing assembly; 2. a getter assembly; 3. an exhaust assembly; 4. a pump body assembly; 6. a compensation component; 7. and a stator.

Detailed Description

It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.

It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the disclosure. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.

The utility model provides a rotational speed stabilising arrangement please refer to fig. 1 to fig. 8, include: a weight member 10; and a coupling member 20 for coupling with a rotor 30 of the compressor, the coupling member 20 having a coupling state of coupling with the weight member 10 and a decoupling state of decoupling from the weight member 10, the coupling member 20 being switchably provided between the coupling state and the decoupling state.

The utility model discloses a rotational speed stabilising arrangement includes counterweight 10 and connecting piece 20, connecting piece 20 is used for being connected with the rotor 30 of compressor, connecting piece 20 has the connected state of being connected with counterweight 10 and the detached state of separating with counterweight 10, connecting piece 20 switchably sets up between connected state and detached state, thus, when compressor low frequency operation, can make connecting piece 20 be in connected state, because the quality of counterweight 10 is great, can store rotatory kinetic energy, can resist the rotational speed change of rotor 30, the effectual rotational speed that reduces rotor 30 when low-speed rotation is undulant, make the rotary motion of the drive assembly of compressor more smooth and stable, reduce the vibration and the noise of core, improve user experience; when the compressor operates at high frequency, the connecting piece 20 can be in a separated state, and the weight part 10 does not rotate together with the rotor 30, so that the power loss of the weight part 10 is not increased, and the COP of the compressor is not influenced.

It should be noted that the transmission assembly includes a rotor 30, a crank shaft assembly 70, and other moving structures.

In the present embodiment, as shown in fig. 1, the connection member 20 includes: a connecting portion 21; an elastic member 22, a first end of the elastic member 22 is used for connecting with the rotor 30, and a second end of the elastic member 22 is connected with the connecting part 21; the elastic member 22 extends in the radial direction of the rotor 30; when the rotating speed of the rotor 30 is less than the preset rotating speed, the connecting part 21 is connected with the weight member 10 under the action of the elastic member 22; when the rotation speed of the rotor 30 is greater than or equal to the preset rotation speed, the connection part 21 compresses the elastic member 22 to move in a radial direction of the rotor 30 toward a direction away from the weight 10 to be separated from the weight 10.

When the compressor is specifically implemented, the connecting part 21 is arranged to play a role in connecting the rotor 30 and the weight part 10, the connecting part 20 can be switched between a connecting state and a separating state due to the arrangement of the elastic part 22, when the rotating speed of the rotor 30 is less than a preset rotating speed, namely, in the starting or low-frequency working process of the compressor, the elastic force of the elastic part 22 enables the connecting part 21 to extend out to be in contact with and connected with the weight part 10, the weight part 10 rotates along with the connecting part 20 and the rotor 30, the weight part 10 plays a flywheel effect and can store the rotating kinetic energy and be beneficial to resisting the change of the rotating speed of the rotor 30, therefore, when a piston of the compressor acts on a variable moment on a transmission assembly or is applied to intermittent load, the fluctuation of the transmission assembly can be effectively reduced, the rotating motion is more stable, the vibration and the noise of a machine core are reduced, and the user experience is improved; when the rotating speed of the rotor 30 is greater than or equal to the preset rotating speed, namely, when the compressor works at high frequency, under the centrifugal action, the connecting part 21 compresses the elastic part 22, the elastic part 22 contracts, the connecting part 21 is separated from the counterweight part 10, and the counterweight part 10 does not rotate together with the rotor 30, so that the rotor 30 is ensured to drive a small load under the condition of a large rotating speed, the power loss is not increased, and the COP of the compressor is not influenced.

Specifically, COP (Coefficient Of Performance) refers to a ratio Of a cooling capacity to an input power Of a compressor, and a higher COP value indicates a higher efficiency Of the compressor.

In particular, the elastic member 22 is a spring, but may be another type of elastic member.

In this embodiment, as shown in fig. 1, the connection member 20 further includes: connecting body 23 for connecting with rotor 30, connecting body 23 is provided with mounting groove 24, and at least part of elastic component 22 is arranged in mounting groove 24, and the first end of elastic component 22 is connected with connecting body 23.

In specific implementation, the connecting body 23 is used for connecting the elastic member 22, the connecting portion 21 and the rotor 30, and the mounting groove 24 is disposed on the connecting body 23 and is used for accommodating the elastic member 22, so as to prevent the elastic member 22 from falling off during the rotation of the connecting member 20. When the compressor operates at a high frequency, the connection portion 21 is retracted into the mounting groove 24 by centrifugal force.

In particular, the connecting body 23 is of a second annular configuration, with an outer diameter equal to that of the rotor 30, or smaller than that of the rotor 30, such an arrangement avoiding the interference of the connecting body 23 with the stator 7 of the compressor.

Optionally, the connecting body 23 is connected with the rotor 30 by gluing; alternatively, the connecting body 23 is uniformly provided with a plurality of screw holes in a circumferential direction thereof, and the connecting body 23 is fixedly connected with the rotator 30 by screws inserted through the plurality of screw holes and the rotator 30.

In the present embodiment, as shown in fig. 1 and 2, the connection portion 21 includes a first connection portion 211 and a second connection portion 212 connected to the first connection portion 211; the mounting groove 24 comprises a first groove body 241 and a second groove body 242 communicated with the first groove body 241; the second end of the elastic element 22 is connected with the first end of the first connecting part 211, and both the elastic element 22 and the first connecting part 211 are movably arranged in the first groove body 241; the first end of the second connecting portion 212 is connected to the second end of the first connecting portion 211, and the second connecting portion 212 is inserted into the second slot 242, so that when the connecting member 20 is in the connecting state, the second end of the second connecting portion 212 is connected to the weight member 10. The connecting portion 21 is T-shaped, the first connecting portion 211 is a horizontal portion of the T-shape, the second connecting portion 212 is a vertical portion of the T-shape, the first slot body 241 and the second slot body 242 are slot bodies with equal width, the width of the first slot body 241 is greater than that of the second slot body 242, and the width directions of the first slot body 241 and the second slot body 242 are the circumferential directions of the connecting main body 23.

During the concrete implementation, when connecting piece 20 is in the connection status, the partial structure of second connecting portion 212 is located second cell body 242, and the second cell body 242 is stretched out to the remaining part to be connected with counterweight 10, because the width of second cell body 242 is less than the width of first cell body 241, first connecting portion 211 can't get into second cell body 242, has avoided connecting portion 21 whole to stretch out mounting groove 24, in order to carry on spacingly to connecting portion 21, guarantees that connecting portion 21 follows the reliable motion of the radial direction of connecting piece 20.

In the present embodiment, as shown in fig. 3, the weight member 10 includes a weight main body 11 and a toothed disc 12 connected to the weight main body 11, wherein a plurality of connecting teeth 13 of the toothed disc 12 are arranged at intervals along a circumferential direction of the toothed disc 12 to form a plurality of recesses 14; when the connection member 20 is in the connected state, at least a portion of the connection portion 21 is inserted in the recess 14.

In specific implementation, when at least a portion of the connecting portion 21 is inserted into the recess 14, the connecting portion 21 is engaged with the fluted disc 12, so that the rotor 30 can drive the weight member 10 to rotate together when rotating.

Specifically, the outer diameter of the toothed disc 12 is smaller than the inner diameter of the connecting body 23, and the thickness of the toothed disc 12 is greater than the thickness of the connecting body 23, so that the weight 10 is prevented from interfering with the connecting body 23.

In the present embodiment, the connecting member 20 is disposed around the toothed disc 12 and is configured to be disposed between the weight main body 11 and the rotor 30, and the connecting member 20 includes a plurality of pairs of connecting portions 21 and elastic members 22; the plurality of connecting portions 21 are provided in one-to-one correspondence with the plurality of recessed portions 14, and at least a part of the connecting portion 21 is inserted into the corresponding recessed portion 14 when the connecting member 20 is in the connected state. This arrangement increases the tightness of the connection between the connecting member 20 and the weight member 10, and prevents the connecting member 20 and the weight member 10 from being separated during the rotation thereof.

Specifically, the connecting body 23 is provided with a plurality of mounting grooves 24, the plurality of mounting grooves 24 are arranged in one-to-one correspondence with the plurality of connecting portions 21, and at least a portion of each connecting portion 21 is configured to be disposed in the corresponding mounting groove 24.

In the present embodiment, as shown in fig. 3, the connecting tooth portion 13 has a first flank 15 and a second flank 16 disposed opposite to each other in the circumferential direction of the toothed disc 12, and the connecting tooth portion 13 has a top land 17; a first end of the tooth top surface 17 is in arc transition connection with a first end of the first tooth side surface 15, a second end of the tooth top surface 17 is connected with the second tooth side surface 16, and a second end of the first tooth side surface 15 is in arc transition connection with the bottom of the concave part 14; and/or second flank 16 is planar.

In specific implementation, the second flank 16 is a plane, so that the connecting tooth portion 13 is matched with the extended second connecting portion 212, and the second connecting portion 212 is meshed with the connecting tooth portion 13; the first tooth flank 15 and the top surface 17 of the tooth and the bottom of the recess 14 are both in arc transition connection, which facilitates the separation of the second connecting portion 212 from the connecting tooth portion 13.

In the present embodiment, as shown in fig. 3, the weight body 11 is a first annular structure, and the top of the weight body 11 has a tapered surface 18; the weight main body 11 is disposed around at least a portion of the bracket 40 of the compressor with a flow gap therebetween. Tapered surface 18 is configured to allow lubricant within the compressor to flow from tapered surface 18 down to the flow gap, then to bearing assembly 60, and then to toothed disc 12, thereby lubricating both bearing assembly 60 and toothed disc 12.

In particular, the diameter of the first annular structure is smaller than or equal to the diameter of the rotor, such an arrangement avoiding the counterweights from interfering with the stator 7.

In this embodiment, as shown in fig. 5, the rotational speed stabilizing apparatus further includes: a fixing ring 50 for fixedly connecting with the bracket 40 of the compressor; and a bearing assembly 60 disposed around the fixing ring 50, the bearing assembly 60 being disposed between the fixing ring 50 and the weight member 10, the provision of the bearing assembly 60 ensuring smooth rotation of the weight member 10. Wherein the bearing assembly 60 is a tapered roller bearing.

In other embodiments, the bearing assembly 60 is a deep groove ball bearing or a cylindrical roller bearing.

Specifically, the center line of the weight member 10 is the rotation axis thereof, the center line of the connecting member 20 is the rotation axis thereof, the rotor 30 rotates around the axis thereof, and the center line of the weight member 10 and the center line of the connecting member 20 are both coincident with the axis of the rotor 30.

The rotating speed stabilizing device improves the stability of the rotating speed of the compressor during low-frequency operation by utilizing the increased mass (namely the counterweight), reduces the vibration and the noise of the compressor, and prolongs the service life of the compressor; meanwhile, the friction power consumption in high-frequency operation is not increased when the compressor operates at high frequency, and COP is not influenced when the compressor operates at high frequency.

The utility model also provides a compressor, please refer to fig. 6 to 8, including rotor 30 and bent axle subassembly 70, rotor 30 rotationally sets up to drive bent axle subassembly 70 and rotate, the compressor still includes the rotational speed stabilising arrangement in the above-mentioned embodiment, and rotational speed stabilising arrangement's connecting piece 20 is connected with rotor 30.

Specifically, the weight member 10 and the connecting member 20 are both disposed around the crankshaft assembly 70; the compressor further comprises a bracket 40, and the weight member 10 and the connecting member 20 are all arranged around the bracket 40.

Specifically, the compressor comprises a shell assembly 1, an air suction assembly 2, an exhaust assembly 3, a pump body assembly 4, a compensation assembly 6, a stator 7, a rotor 30, a bracket 40, a crankshaft assembly 70 and other parts.

The utility model also provides a refrigerator, including the compressor in the above-mentioned embodiment.

From the above description, it can be seen that the above-mentioned embodiments of the present invention achieve the following technical effects:

It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the accompanying drawings are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application described herein are, for example, capable of operation in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

For ease of description, spatially relative terms such as "over … …", "over … …", "over … …", "over", etc. may be used herein to describe the spatial positional relationship of one device or feature to another device or feature as shown in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" may include both orientations of "above … …" and "below … …". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

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 in the protection scope of the present invention.

Claims

1. A rotational speed stabilizing apparatus, comprising:

a weight (10);

a connection member (20) for connection with a rotor (30) of a compressor, the connection member (20) having a connected state connected with the counterweight (10) and a disconnected state disconnected from the counterweight (10), the connection member (20) being switchably arranged between the connected state and the disconnected state.

2. A rotational speed stabilizing arrangement according to claim 1, characterized in that the coupling (20) comprises:

a connecting portion (21);

an elastic member (22), a first end of the elastic member (22) is used for connecting with the rotor (30), and a second end of the elastic member (22) is connected with the connecting part (21); the elastic member (22) extends in a radial direction of the rotor (30);

when the rotating speed of the rotor (30) is less than the preset rotating speed, the connecting part (21) is connected with the counterweight part (10) under the action of the elastic part (22); when the rotation speed of the rotor (30) is greater than or equal to the preset rotation speed, the connection portion (21) compresses the elastic member (22) to move in a radial direction of the rotor (30) toward a direction away from the weight member (10) to be separated from the weight member (10).

3. A rotational speed stabilizing arrangement according to claim 2, wherein the coupling (20) further comprises:

connecting body (23), be used for with rotor (30) are connected, connecting body (23) are last to be provided with mounting groove (24), at least part setting of elastic component (22) is in mounting groove (24), the first end of elastic component (22) with connecting body (23) are connected.

4. A rotation speed stabilizing apparatus according to claim 3, wherein the connecting portion (21) includes a first connecting portion (211) and a second connecting portion (212) connected to the first connecting portion (211); the mounting groove (24) comprises a first groove body (241) and a second groove body (242) communicated with the first groove body (241); the second end of the elastic piece (22) is connected with the first end of the first connecting part (211), and both the elastic piece (22) and the first connecting part (211) can be movably arranged in the first groove body (241); the first end of the second connecting portion (212) is connected with the second end of the first connecting portion (211), and the second connecting portion (212) is arranged in the second groove body (242) in a penetrating mode, so that when the connecting piece (20) is in the connecting state, the second end of the second connecting portion (212) is connected with the counterweight (10).

5. The rotational speed stabilizing apparatus according to claim 2, wherein the weight member (10) includes a weight main body (11) and a toothed disc (12) connected to the weight main body (11), a plurality of connecting teeth portions (13) of the toothed disc (12) being provided at intervals in a circumferential direction of the toothed disc (12) to form a plurality of recesses (14);

when the connecting member (20) is in the connected state, at least a portion of the connecting portion (21) is inserted in the recess (14).

6. The rotational speed stabilizing apparatus according to claim 5, wherein the connecting member (20) is provided around the toothed disc (12) for being disposed between the weight main body (11) and the rotor (30), the connecting member (20) including a plurality of pairs of the connecting portions (21) and the elastic members (22) provided in pairs; the connecting parts (21) are arranged in one-to-one correspondence with the concave parts (14), and when the connecting piece (20) is in the connecting state, at least part of the connecting part (21) is inserted into the corresponding concave part (14).

7. The rotational speed stabilizing device according to claim 5, wherein the connecting tooth portion (13) has a first flank (15) and a second flank (16) which are arranged opposite to each other in a circumferential direction of the toothed disc (12), and the connecting tooth portion (13) has a top flank (17);

a first end of the tooth top surface (17) is in arc transition connection with a first end of the first tooth side surface (15), a second end of the tooth top surface (17) is connected with the second tooth side surface (16), and a second end of the first tooth side surface (15) is in arc transition connection with a bottom of the concave part (14); and/or the second flank (16) is plane.

8. A rotational speed stabilizing device according to claim 5, wherein the weight body (11) is a first ring-shaped structure, the top of the weight body (11) having a tapered surface (18); the counterweight body (11) is disposed around at least a portion of a bracket (40) of the compressor with a flow gap therebetween.

9. A rotation speed stabilizing device according to any one of claims 1 to 8, characterized by further comprising:

a fixed ring (50) for fixed connection with a bracket (40) of the compressor;

a bearing assembly (60) disposed around the retaining ring (50), the bearing assembly (60) disposed between the retaining ring (50) and the weight (10).

10. Compressor comprising a rotor (30) and a crankshaft assembly (70), said rotor (30) being rotatably arranged to rotate said crankshaft assembly (70), characterized in that it further comprises a rotational speed stabilizing device according to any one of claims 1 to 9, the connecting member (20) of said rotational speed stabilizing device being connected to said rotor (30).

11. A refrigerator characterized by comprising the compressor of claim 10.