CN219587777U - Counterweight structure, rotor assembly and compressor - Google Patents

Abstract

The utility model provides a counterweight structure, a rotor assembly and a compressor, comprising: the counterweight part is arranged at the end part of the rotor, is of an annular structure matched with the end part of the rotor and is used for carrying out counterweight; and the balance part is connected with the balance weight part, protrudes out of the end part of the balance weight part, and covers one side of the balance weight part. By the technical scheme provided by the utility model, the technical problem that the rotor assembly in the prior art is small in rotational inertia can be solved.

Description

Counterweight structure, rotor assembly and compressor

Technical Field

The utility model relates to the technical field of compressors, in particular to a counterweight structure, a rotor assembly and a compressor.

Background

Currently, in the prior art, the market competition of the compressors of the household air conditioner is strong, the cost pressure of the compressors is high, so the motor stack height of many compressors is smaller and smaller, particularly the rotor assembly outer diameter of the small series of compressors is small, and the rotor assembly moment of inertia of the small stack height is smaller.

However, since the moment of resistance varies every one revolution of the compressor pump body, if the moment of inertia of the rotor assembly and the crank rotation system is too small, the motor output efficiency is lowered, resulting in a reduction in compressor energy, and the compressor is prone to abnormal vibration, etc.

Disclosure of Invention

The utility model mainly aims to provide a counterweight structure, a rotor assembly and a compressor, so as to solve the technical problem that the rotor assembly in the prior art has small moment of inertia.

In order to achieve the above object, according to one aspect of the present utility model, there is provided a weight structure comprising:

the counterweight part is arranged at the end part of the rotor, is of an annular structure matched with the end part of the rotor and is used for carrying out counterweight;

and the balance part is connected with the balance weight part, protrudes out of the end part of the balance weight part, and covers one side of the balance weight part.

Further, the counter weight part is provided with an avoiding part, and the avoiding part is arranged in a through hole of the rotor.

Further, the weight part is of a central symmetrical structure; and/or the number of the groups of groups,

the counterweight structure is made of non-magnetic conductive materials; and/or the number of the groups of groups,

the counterweight structure is an integrated structure.

Further, the thickness of the counterweight part is H, and H is more than or equal to 3mm.

Further, the weight portion includes a plurality of weight stacks; a plurality of weight stack is stacked on an end of the rotor in an axial direction of the rotor such that the plurality of weight stack forms a weight.

Further, the thickness of the counterweight lamination is h which is more than or equal to 0.3mm and less than or equal to 0.8mm.

Further, a first positioning structure is arranged on one side of the counterweight lamination, and a second positioning structure matched with the first positioning structure in a positioning way is arranged on the other side of the counterweight lamination, so that the counterweight lamination is matched with the second positioning structure of the other counterweight lamination in a positioning way through the first positioning structure of the counterweight lamination.

Further, the first location structure is the positioning groove, and the second location structure is the location arch, and first location structure and second location structure set up relatively, and first location structure and second location structure all form through the punching press of counter weight lamination.

Further, the first positioning structure is a strip-shaped structure, and the strip-shaped structure extends along the circumferential direction of the counterweight part; and/or the number of the groups of groups,

the first positioning structures are multiple, and the first positioning structures are arranged at intervals along the circumferential direction of the counterweight part.

According to another aspect of the present utility model, there is provided a rotor assembly comprising:

the rotor and the counterweight structure provided by the utility model are arranged at the end part of the rotor.

According to yet another aspect of the present utility model, there is provided a compressor including the rotor assembly provided above.

By applying the technical scheme of the utility model, the counterweight structure formed by the counterweight part and the balance part is arranged at the end part of the rotor, so that the counterweight structure can be ensured to have the balance effect and the counterweight effect, and the balance during the rotation of the rotor can be realized and the rotor moment of inertia can be increased through the counterweight part and the balance part, thereby effectively improving the compressor energy efficiency.

Drawings

The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the utility model. In the drawings:

fig. 1 is a schematic view showing a counterweight structure matched with a rotor according to a first embodiment of the utility model;

FIG. 2 illustrates a top view of a counterweight structure provided in accordance with a first embodiment of the utility model mated with a rotor;

fig. 3 is a schematic view showing a structure of a circular weight portion provided according to a first embodiment of the present utility model;

FIG. 4 illustrates a schematic structural view of a weight stack provided in accordance with a first embodiment of the present utility model;

FIG. 5 illustrates a cross-sectional view of a counterweight lamination provided in accordance with a first embodiment of the utility model;

FIG. 6 shows an enlarged schematic view of a partial structure at A in FIG. 5;

FIG. 7 shows an enlarged schematic view of a first positioning structure provided in accordance with a first embodiment of the present utility model;

FIG. 8 is a schematic diagram illustrating a structure of a plurality of weight stacks provided in accordance with a first embodiment of the present utility model;

FIG. 9 is a schematic view showing a structure of a plurality of weight stacks according to a first embodiment of the present utility model;

fig. 10 is a schematic view showing a structure in which a weight part and a balance part are integrated according to a first embodiment of the present utility model;

fig. 11 shows a relationship between the thickness of the weight and the moment of inertia according to the first embodiment of the present utility model.

Wherein the above figures include the following reference numerals:

10. a weight part; 11. an avoidance unit; 12. a counterweight lamination; 121. a first positioning structure; 122. a second positioning structure;

20. a balancing part;

30. a rotor; 31. and a through hole.

Detailed Description

It should be noted that, without conflict, the embodiments of the present utility model and features of the embodiments may be combined with each other. The utility model will be described in detail below with reference to the drawings in connection with embodiments.

Referring to fig. 1 to 11, in a first embodiment of the present utility model, there is provided a weight structure including: a weight portion 10 and a balance portion 20. The weight portion 10 is mounted at an end of the rotor 30, the weight portion 10 is of an annular structure adapted to the end of the rotor 30, and the weight portion 10 is used for weight. The balance part 20 is connected with the weight part 10, the balance part 20 protrudes from the end part of the weight part 10, and the balance part 20 covers one side of the weight part 10.

By adopting the counterweight structure provided by the embodiment, the balance part 20 with the balance function and the counterweight part 10 with the inertia increasing function can be arranged at the end part of the rotor 30, and the rotor 30 can keep balance and increase the inertia in the rotation working process through the arrangement of the balance part 20 and the counterweight part 10, so that the shaking of the compressor can be avoided, and the energy efficiency can be effectively improved.

In the present embodiment, the weight portion 10 is provided with the relief portion 11, and the relief portion 11 is provided so as to be away from the through-hole 31 of the rotor 30. The setting of dodging portion 11 can provide the heat transfer passageway for rotor 30 inner structure, effectively reduces the temperature of rotor 30 inner structure at the during operation, prevents that inner structure from inefficacy or damaging, can strengthen the stability of compressor work.

In this embodiment, the weight portion 10 may have a central symmetrical structure, so that the arrangement can avoid affecting the operation of the rotor assembly, and ensure the balance of the operation of the rotor assembly.

Alternatively, the counterweight structure may be made of a non-magnetically conductive material, so as to avoid affecting the magnetic components inside the rotor 30, and thus the operation stability of the compressor.

Still alternatively, the counterweight structure can also be an integrated structure, and other processing steps can be saved to the integrated structure also can effectively increase counterweight structure's bulk strength, thereby effectively reinforcing counterweight structure operational reliability.

The counterweight structure may be integrally formed and supported by a non-magnetic conductive material, and the counterweight portion 10 of the counterweight structure may be a central symmetrical structure.

In this embodiment, the thickness of the weight portion 10 is H, H.gtoreq.3 mm. If the thickness of the counterweight 10 is too small, the counterweight 10 is arranged to not help the mass of the end part of the lifting rotor 30, so that the moment of inertia of the lifting rotor 30 is not assisted.

Specifically, the weight 10 includes a plurality of weight stacks 12. A plurality of weight stack 12 are stacked on an end of the rotor 30 in an axial direction of the rotor 30 such that the plurality of weight stack 12 are stacked to form the weight 10. With such an arrangement, the number of stacks of weight stack 12 can be flexibly changed according to actual production work requirements, so that the mass of the weight 10 can be flexibly changed to adapt to the work requirements of different rotors 30 and different compressors.

In this embodiment, the weight stack 12 has a thickness h of 0.3 mm.ltoreq.h.ltoreq.0.8 mm. With such an arrangement, it is possible to ensure that the weight stack 12 has the required quality, and that the weight stack 12 is not overly difficult to process and assemble. In addition, flexible adjustment of the weight stack 12 can also be facilitated.

Specifically, one side of the weight stack 12 is provided with a first positioning structure 121, and the other side of the weight stack 12 is provided with a second positioning structure 122 that is in positioning fit with the first positioning structure 121, so as to perform positioning fit with the second positioning structure 122 of the other weight stack 12 through the first positioning structure 121 of the one weight stack 12. Such an arrangement can facilitate the mounting engagement between the two weight stacks 12 and can eliminate the need for other engagement structures, greatly reducing the cost of manufacturing and improving the efficiency of mounting between the weight stacks 12.

In this embodiment, the first positioning structure 121 is a positioning groove, the second positioning structure 122 is a positioning protrusion, the first positioning structure 121 and the second positioning structure 122 are oppositely arranged, and the first positioning structure 121 and the second positioning structure 122 are both formed by punching the weight stack 12. The forming of the first positioning structure 121 and the second positioning structure 122 can be completed in the process of stamping again, so that the processing steps and cost of the counterweight lamination 12 can be reduced, and the first positioning structure 121 and the second positioning structure 122 are stamped simultaneously, and the positions of the first positioning structure 121 and the second positioning structure 122 are fixedly corresponding to each other, so that the counterweight lamination 12 can be matched more conveniently.

Specifically, the first positioning structure 121 may be a bar-shaped structure extending along the circumferential direction of the weight portion 10, or the first positioning structure 121 may be plural, and the plural first positioning structures 121 may be disposed at intervals along the circumferential direction of the weight portion 10. Alternatively, the first positioning structure 121 may be a plurality of bar-shaped structures arranged at intervals along the circumferential direction of the weight portion 10. Such an arrangement enables a more stable fit between the two weight stacks 12 and thus promotes stability of the rotor assembly during operation.

When the compressor works, for each working period, the requirement of the pump body on torsion is fluctuated; while for an electric machine, its designed output torque is constant; therefore, the rotational inertia of a rotating system formed by the crankshaft, the rollers and the motor rotor cannot be too small, otherwise, the compressor efficiency is reduced, and even abnormal shaking of the compressor occurs.

The table below is the measured comparison data of the moment of inertia and the energy efficiency of the QXF-G088zC170 compressor before and after improvement, the energy efficiency of the compressor is obviously improved by increasing the moment of inertia of a rotor, and the comprehensive energy efficiency is improved by 0.37%.

Scheme for the production of a semiconductor device	Original scheme	Improved scheme
			Moment of inertia	148	179
Energy efficiency	Datum	0.37％

The following table shows the refrigeration and power consumption of different types of compressors.

The following table is a model a, the calculated value of the rotational inertia of the rotor and the comprehensive energy efficiency value of the compressor after adding the counterweight structures with different thicknesses, and fig. 11 is an energy efficiency improvement effect curve drawn according to the table.

Thickness of counterweight structure	Moment of inertia	APF lifting
			0	122.9	0
3	140.2	0.18％
			4.8	150.7	0.23％
6.8	162.2	0.32％
			8.8	173.9	0.43％
10.8	185.5	0.47％
			12.8	197.1	0.44％
14.8	208.6	0.46％

In the present embodiment, the weight portion 10 has a center symmetrical structure with respect to the center of the crankshaft as a center of symmetry.

The balance weight 10 is distinguished from the balance 20 structure in that the balance 20 is of an asymmetric structure, and the balance 20 is used to offset the eccentric design of the crankshaft roller in the pump body component, thereby enabling the moving shafting system to achieve balanced operation. The weight portion 10 is added to increase the moment of inertia of the rotating system after the rotating shafting system is balanced. The moment of inertia is understood to be the inertia of the rotor. The weight portion 10 may have a central symmetrical structure.

As shown in fig. 2, the outer edge of the counterweight portion 10 may be provided with a rotor through-hole 31 avoiding structure avoiding portion 11, where the avoiding portion 11 is disposed corresponding to the through-hole 31 on the rotor 30, and the through-holes 31 are designed near the rotor 30, so as to reduce the temperature of the magnetic steel, prevent the magnetic steel from demagnetizing, and improve the reliability of the motor.

As shown in fig. 3, the outer circle of the weight part 10 has a circular structure, so that a solid part far from the center of the rotor 30 can be better utilized, and the moment of inertia of the rotor 30 can be increased. Because of moment of inertiaThe mass distribution of the balancing weight is therefore particularly important.

In the present embodiment, the thickness of the weight portion 10 is designed to be 3mm or more. An important characteristic of the counterweight structure, which is different from the rotor baffle, is that the thickness of the counterweight structure is thicker, the weight is larger, and is generally larger than 3mm, while the counterweight structure is mainly used for limiting magnetic steel, and the thickness of the counterweight structure is generally thinner, and is generally 1, 1.5 and 2 mm.

In this embodiment, the weight portion 10 is made of a non-magnetic material, and if the magnetic material is used, the performance of the motor is seriously affected, resulting in failure of the motor and the compressor.

In another arrangement of this embodiment, the weight portion 10 and the balance portion 20 may be of an integral structure, and the thickness of the weight portion 10 is greater than or equal to 3mm. The counterweight structure and the balance part 20 are arranged into an integrated structure, so that the number of parts of the compressor can be reduced, and the production and assembly cost of the compressor can be reduced. As shown in fig. 10, a schematic structural diagram thereof is provided.

In this embodiment, the weight portion 10 is a laminated sheet structure (i.e. weight stack 12), each weight stack 12 is provided with a fastening point, the protruding portion of the fastening point is a first positioning structure 121, and the recessed portion of the fastening point is a second positioning structure 122. The weight 10 may comprise a number of weight structure monoliths.

The buckling points of the counterweight laminates 12 can be of a punch forming structure, and the counterweight laminates 12 are connected and fixed through the matching of the buckling points, so that the fixing mode is efficient and low in production cost.

In addition, according to the specific requirement of the weight portion 10, the single pieces of the weight stack 12 can be stacked to form corresponding sizes and heights, so that the thickness and the number of the weight structure blocks can be adjusted in the production process, and the process with higher cost such as separate die opening is avoided.

On the other hand. The parts used for counterweight will generally be heavier and more material will be used. If common powder metallurgy, high manganese steel or copper and other materials are adopted, the production process is complex, and the material cost is high. And after the stainless steel lamination is switched, the production cost of the counterweight part 10 can be greatly reduced. At present, the lamination structure is adopted, so that the cost can be reduced by more than 20%.

In this embodiment, the weight stack 12 is a magnetically non-conductive material; such as stainless steel, etc. The thickness of each counterweight lamination 12 can be set to be 0.3-0.8 mm, and when the lamination thickness is 0.3-0.8 mm, the counterweight structures with different heights and weights can be realized, and meanwhile, the production efficiency and the production cost of a processing machine tool can be ensured.

In the embodiment, as shown in fig. 7, the buckling points are rounded rectangles, and the length of the buckling points takes 3-6 mm; the width value is 0.5-1.5 mm.

In a second embodiment of the present utility model, there is provided a rotor assembly including a rotor 30 and the weight structure provided in the first embodiment, the weight structure being mounted at an end of the rotor 30.

A third embodiment of the present utility model provides a compressor including the rotor assembly provided in the second embodiment.

From the above description, it can be seen that the above embodiments of the present utility model achieve the following technical effects: by providing the balancing part 20 having a balancing function and the weight part 10 having an increasing weight function at the end of the rotor assembly, a balancing support can be provided at the time of the rotation self-assembly work, and the weight part 10 can also effectively increase the moment of inertia of the end of the rotor 30, thereby effectively improving the energy efficiency of the compressor.

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 exemplary embodiments according to the present utility model. As used herein, the singular is also intended to include the plural unless the context clearly indicates otherwise, and furthermore, it is to be understood that the terms "comprises" and/or "comprising" when used in this specification are taken to specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof.

The relative arrangement of the components and steps, numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present utility model unless it is specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective parts shown in the drawings are not drawn in actual scale for convenience of description. Techniques, methods, and apparatus known to one of ordinary skill in the relevant art may not be discussed in detail, but should be considered part of the specification where appropriate. In all examples shown and discussed herein, any specific values should be construed as merely illustrative, and not a limitation. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further discussion thereof is necessary in subsequent figures.

In the description of the present utility model, it should be understood that the azimuth or positional relationships indicated by the azimuth terms such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal", and "top, bottom", etc., are generally based on the azimuth or positional relationships shown in the drawings, merely to facilitate description of the present utility model and simplify the description, and these azimuth terms do not indicate and imply that the apparatus or elements referred to must have a specific azimuth or be constructed and operated in a specific azimuth, and thus should not be construed as limiting the scope of protection of the present utility model; the orientation word "inner and outer" refers to inner and outer relative to the contour of the respective component itself.

Spatially relative terms, such as "above … …," "above … …," "upper surface at … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial location relative to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "above" or "over" other devices or structures would then be oriented "below" or "beneath" the other devices or structures. Thus, the exemplary term "above … …" may include both orientations of "above … …" and "below … …". The device may also be positioned in other different ways (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

In addition, the terms "first", "second", etc. are used to define the components, and are only for convenience of distinguishing the corresponding components, and the terms have no special meaning unless otherwise stated, and therefore should not be construed as limiting the scope of the present utility model.

The above description is only of the preferred embodiments of the present utility model and is not intended to limit the present utility model, but various modifications and variations can be made to the present utility model by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.

Claims (10)

1. A counterweight structure, comprising:

the counterweight part (10), the counterweight part (10) is installed at the end part of the rotor (30), the counterweight part (10) is of an annular structure matched with the end part of the rotor (30), and the counterweight part (10) is used for carrying out counterweight;

the balance part (20) is connected with the balance weight part (10), the balance part (20) protrudes out of the end part of the balance weight part (10), and the balance part (20) covers one side of the balance weight part (10);

the counterweight (10) comprises a plurality of counterweight laminations (12); the plurality of weight stacks (12) are stacked at an end of the rotor (30) in an axial direction of the rotor (30) such that the plurality of weight stacks (12) are stacked to form the weight (10).

2. The counterweight structure according to claim 1, characterized in that the counterweight portion (10) is provided with an avoiding portion (11), and the avoiding portion (11) is arranged to avoid a through-flow hole (31) of the rotor (30).

3. The counterweight structure according to claim 1, characterized in that the counterweight (10) is a centrosymmetric structure; and/or the number of the groups of groups,

the counterweight structure is made of non-magnetic conductive materials; and/or the number of the groups of groups,

the counterweight structure is an integrated structure.

4. The counterweight structure according to claim 1, characterized in that the thickness of the counterweight (10) is H, H being equal to or greater than 3mm.

5. The counterweight structure as recited in claim 1, characterized in that the counterweight lamination (12) has a thickness h of 0.3 mm-h-0.8 mm.

6. The counterweight structure as recited in claim 1, characterized in that one side of the counterweight laminations (12) is provided with a first positioning structure (121), and the other side of the counterweight laminations (12) is provided with a second positioning structure (122) in positioning engagement with the first positioning structure (121) to perform positioning engagement with the second positioning structure (122) of the other counterweight lamination (12) through the first positioning structure (121) of one counterweight lamination (12).

7. The counterweight structure according to claim 6, characterized in that the first positioning structure (121) is a positioning groove, the second positioning structure (122) is a positioning protrusion, the first positioning structure (121) and the second positioning structure (122) are oppositely arranged, and the first positioning structure (121) and the second positioning structure (122) are formed by punching the counterweight lamination (12).

8. The counterweight structure according to claim 6, characterized in that the first positioning structure (121) is a strip-like structure extending in the circumferential direction of the counterweight (10); and/or the number of the groups of groups,

the number of the first positioning structures (121) is plural, and the plurality of the first positioning structures (121) are arranged at intervals along the circumferential direction of the counterweight part (10).

9. A rotor assembly, comprising:

a rotor (30);

the counterweight structure of any of claims 1 to 8, mounted at an end of the rotor (30).

10. A compressor comprising a rotor assembly as claimed in claim 9.