CN216812052U - Outer rotor compressor and refrigeration plant - Google Patents

Abstract

The utility model relates to the technical field of compressors, and provides an outer rotor compressor and refrigeration equipment. Because the bearing is located to the stator cover and makes stator and bearing clearance fit each other, can avoid the stator to extrude the bearing and lead to the condition that the shaft hole of bearing appears warping, can effectively improve the job stabilization nature who adopts external rotor compressor, through lock nut and screw thread portion threaded connection and make lock nut press the stator, can effectively fix the stator on the bearing, guaranteed the installation steadiness of stator, can effectively improve the operational reliability who adopts above-mentioned external rotor compressor.

Description

Outer rotor compressor and refrigeration plant

Technical Field

The utility model relates to the technical field of compressors, and particularly provides an outer rotor compressor and refrigeration equipment.

Background

Conventional motors can be divided into an inner rotor motor and an outer rotor motor according to their structures. The outer rotor motor has the advantages of strong starting capability, high energy efficiency, low material cost and the like due to the adoption of the structure with an external rotor, so that the outer rotor motor is concerned by more and more compressor manufacturers.

For a compressor adopting an outer rotor motor, a stator of the outer rotor motor is sleeved on a bearing and is fixedly connected with the bearing. At present, the fixed connection mode of a stator and a bearing is an interference fit connection mode and a welding mode, and for the interference fit connection mode, the stator is generally sleeved on the bearing in a cold pressing mode, in the process, a shaft hole of the bearing is deformed due to pressure, so that a crankshaft of a compressor can be greatly abraded when rotating in the shaft hole, and the working stability of the compressor is reduced; for the welding mode, because the crankcase of compressor generally adopts cast iron to make, and the bearing also adopts cast iron to make promptly, and the iron core of stator generally adopts silicon steel to make, and the welding performance between cast iron and the silicon steel is relatively poor, has the risk that the stator drops, leads to the operational reliability decline of compressor.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide an outer rotor compressor and refrigeration equipment, and aims to solve the technical problems that the stator of the conventional outer rotor compressor is poor in installation stability and a shaft hole of a bearing of the outer rotor compressor is easy to deform.

In order to achieve the purpose, the embodiment of the utility model adopts the technical scheme that: the utility model provides an external rotor compressor, includes crankcase and external rotor electric machine, the crankcase includes axle bed and bearing, the bearing set up in on the axle bed, external rotor electric machine includes the stator, external rotor compressor still includes lock nut, the bearing is kept away from the one end of axle bed is equipped with screw thread portion, the stator cover is located on the bearing, just the inner hole wall of stator with the outer peripheral face clearance fit of bearing, lock nut with screw thread portion threaded connection, just lock nut presses the stator so that the stator with the bearing is fixed mutually.

The outer rotor compressor provided by the embodiment of the utility model at least has the following beneficial effects: the stator is sleeved on the bearing and the stator and the bearing are in clearance fit with each other, so that the situation that the shaft hole of the bearing is deformed due to the fact that the stator extrudes the bearing can be avoided, and the working stability of the external rotor compressor can be effectively improved; simultaneously, through the threaded connection of the locking nut and the threaded part of the bearing, and the locking nut is pressed against the stator, so that the stator can be effectively fixed on the bearing, the installation stability of the stator is ensured, and the working reliability of the external rotor compressor can be effectively improved.

In one embodiment, the bearing comprises a main body part and a base arranged on the shaft seat, the base is provided with a positioning end face, the main body part is connected to the positioning end face and extends towards the direction far away from the base, the threaded part is arranged at one end, far away from the base, of the main body part, the stator is sleeved on the main body part, the inner hole wall of the stator is in clearance fit with the outer peripheral face of the main body part, and the stator is abutted to the positioning end face.

In one embodiment, the main body portion and the base are integrally formed.

In one embodiment, a groove is formed at a connection position between the main body part and the base, and the groove is communicated with the positioning end face.

In one embodiment, the difference between the axial distance from the end face of the main body part facing away from the shaft seat to the positioning end face and the axial length of the central hole of the stator is smaller than or equal to the axial length of the threaded part.

In one embodiment, the lock nut includes a nut body configured to abut against the stator, and an annular boss provided on an outer peripheral wall of the nut body and disposed around an axis of the lock nut.

In one embodiment, the outer peripheral wall of the annular boss is provided with a first abutting plane and a second abutting plane, and the first abutting plane and the second abutting plane are arranged oppositely to each other.

In one embodiment, the outer rotor motor further comprises a rotor, the rotor comprises a rotor disc, the rotor disc is provided with a stator cavity, the stator is placed in the stator cavity, and the rotor disc is an integrally formed part.

In one embodiment, the shaft seat is integrally formed with the bearing.

In order to achieve the above object, an embodiment of the present invention further provides a refrigeration apparatus, including the outer rotor compressor according to any one or more of the above embodiments.

Since the refrigeration equipment adopts the outer rotor compressor of any one of the embodiments, the refrigeration equipment at least has the beneficial effects of the embodiment, and the details are not repeated herein.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.

Fig. 1 is a schematic structural diagram of an outer rotor compressor according to an embodiment of the present invention;

FIG. 2 is a schematic diagram of a shaft seat and a bearing of a crankcase in the external rotor compressor shown in FIG. 1;

fig. 3 is a schematic structural view of a lock nut in the external rotor compressor shown in fig. 1;

FIG. 4 is a front view of the lock nut shown in FIG. 3;

fig. 5 is a sectional view of the lock nut shown in fig. 4 taken along the direction a-a.

Wherein, in the figures, the respective reference numerals:

100. an outer rotor compressor; 110. a crankcase; 111. a shaft seat; 112. a bearing; 1121. a main body portion; 11211. a threaded portion; 1122. a base; 11221. positioning the end face; 1123. a groove; 1124. a first shaft hole; 120. an outer rotor motor; 121. a stator; 122. a rotor; 1221. a rotor disk; 1222. a magnetic shoe; 12211. a stator cavity; 130. locking the nut; 131. a nut body; 132. an annular boss; 1321. a first abutment plane; 1322. a second abutment plane; 140. a crankshaft.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the utility model and are not to be construed as limiting the utility model.

In the description of the present invention, it is to be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, are not to be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

A first aspect of the present invention provides an outer rotor compressor 100, and the outer rotor compressor 100 can be applied to a refrigeration device, wherein the refrigeration device includes, but is not limited to, a refrigerator and an air conditioner.

The outer rotor compressor 100 will be described in detail with reference to the drawings.

First, the axial direction described below refers to the axial direction in which the crankshaft 140 of the outer rotor compressor 100 extends.

Referring to fig. 1, an outer rotor compressor 100 includes a crankcase 110, an outer rotor motor 120, a lock nut 130, and a crankshaft 140. The crankcase 110 includes a shaft seat 111 and a bearing 112, the bearing 112 is disposed on the shaft seat 111, a threaded portion 11211 is disposed at an end of the bearing 112 away from the shaft seat 111, a first shaft hole 1124 is disposed at a middle portion of the bearing 112, the crankshaft 140 is disposed in the first shaft hole 1124 in a penetrating manner, and the crankshaft 140 can rotate in the first shaft hole 1124. The outer rotor motor 120 includes a stator 121, the stator 121 is sleeved on the bearing 112, and the stator 121 is in clearance fit with the outer circumferential surface of the bearing 112, that is, a clearance exists between an inner hole wall of the stator 121 and the outer circumferential wall of the bearing 112 after the stator 121 is sleeved on the bearing 112. The lock nut 130 is screwed with the screw portion 11211, and the lock nut 130 is pressed against the stator 121 to fix the stator 121 to the bearing 112.

Specifically, the outer circumferential wall of the threaded portion 11211 is provided with an external thread, and the inner hole wall of the lock nut 130 is provided with an internal thread, and the external thread of the threaded portion 11211 and the internal thread of the lock nut 130 are fitted to each other to attach the lock nut 130 to the threaded portion 11211.

Alternatively, the width of the gap between the stator 121 and the bearing 112 may be in a range of 0.03mm to 0.08mm, specifically, 0.03mm, 0.05mm, 0.08mm, and the like, and of course, the width of the gap between the stator 121 and the bearing 112 may be set according to actual needs, and is not particularly limited herein.

Because the stator 121 is sleeved on the bearing 112 and the stator 121 and the bearing 112 are in clearance fit with each other, the situation that the first shaft hole 1124 of the bearing 112 is deformed due to the stator 121 extruding the bearing 112 can be avoided, and thus the working stability of the external rotor compressor 100 can be effectively improved; meanwhile, the locking nut 130 is screwed with the screw thread portion 11211 of the bearing 112 and the locking nut 130 is pressed against the stator 121, so that the stator 121 can be effectively fixed on the bearing 112, the mounting stability of the stator 121 is ensured, and the operational reliability of the external rotor compressor 100 using the above can be effectively improved.

In an embodiment, please refer to fig. 1 and fig. 2, the bearing 112 includes a main body portion 1121 and a base 1122 disposed on the shaft seat 111, the base 1122 has a positioning end surface 11221, the main body portion 1121 is connected to the positioning end surface 11221, the main body portion 1121 extends in a direction away from the base 1122, the threaded portion 11211 is disposed at one end of the main body portion 1121 away from the base 1122, the stator 121 is sleeved on the main body portion 1121, an inner hole wall of the stator 121 is in clearance fit with an outer circumferential surface of the main body portion 1121, and the stator 121 abuts against the positioning end surface 11221, so that a mounting position of the stator 121 can be effectively defined.

It will be appreciated that axle seat 111, base 1122 and body portion 1121 are coaxially disposed.

In the above embodiment, the main body portion 1121 is integrally formed with the base 1122. Therefore, on one hand, the structural strength of the bearing 112 can be effectively improved, so that the working reliability of the outer rotor compressor 100 can be effectively improved, and on the other hand, the production process of the outer rotor compressor 100 can be simplified, and the production efficiency can be improved.

The integral molding method includes, but is not limited to, a casting process and a die-casting process.

In the above embodiment, as shown in fig. 2, since the main body portion 1121 and the base 1122 are integrally formed, a chamfer is likely to occur at a connecting edge between the base 1122 and the main body portion 1121, so that the stator 121 cannot be attached to the positioning end surface 11221, therefore, a groove 1123 is formed at a connecting position between the main body portion 1121 and the base 1122, and the groove 1123 is connected to the positioning end surface 11221. It will be appreciated that the recess 1123 is an annular groove around the axis of the bearing 112, which ensures flatness of the locating end surface 11221 of the bearing 112 after molding, and thus ensures that the stator 121 can be closely fitted to the locating end surface 11221.

Of course, in other embodiments, the main body portion 1121 may be formed separately from the base 1122, and then the main body portion 1121 is connected to the base 1122 by means of, for example, welding, fastening, and the like, and is not particularly limited herein.

In the above embodiment, the difference between the axial distance between the end surface of the bearing 112 facing away from the shaft seat 111 and the locating end surface 11221 and the axial length of the central hole of the stator 121 is smaller than or equal to the axial length of the threaded portion 11211, in other words, when the stator 121 abuts against the locating end surface 11221, the axial length of the threaded portion 11211 is greater than or equal to the axial distance between the end surface of the stator 121 facing away from the shaft seat 111 and the end surface of the main body portion 1121 facing away from the shaft seat 111, so that the lock nut 130 can be effectively ensured to be moved to a position pressed against the stator 121 along the thread extending direction of the threaded portion 11211 after being in threaded connection with the threaded portion 11211, and thus the stator 121 can be effectively fixed on the bearing 112.

Specifically, as shown in fig. 3 to 5, the lock nut 130 includes a nut body 131 and an annular boss 132, the nut body 131 is configured to abut against the stator 121, an internal thread hole is formed in a middle portion of the nut body 131, the internal thread hole is configured to be in threaded engagement with the threaded portion 11211 of the bearing 112, the annular boss 132 is disposed on an outer peripheral wall of the nut body 131, and the annular boss 132 is disposed around an axis of the nut body 131. The outer diameter of the locking nut 130 can be effectively increased by arranging the annular boss 132 on the nut body 131, when the locking nut 130 needs to be screwed, a worker can hold the annular boss 132 by hand or use an assembling tool to clamp the annular boss 132 and then screw the locking nut 130 with force, and the locking nut 130 can be screwed only by using small force due to the increase of the outer diameter of the locking nut 130, so that the stator 121 can be locked and fixed more conveniently.

Specifically, as shown in fig. 4, the outer peripheral wall of the annular boss 132 is provided with a first abutting plane 1321 and a second abutting plane 1322, and the first abutting plane 1321 and the second abutting plane 1322 are disposed opposite to each other. When the worker screws the lock nut 130 by means of an assembly tool such as a wrench, a robot arm, etc., the first and second abutment planes 1321 and 1322 may provide a clamping position for the assembly tool so that the lock nut 130 can be kept stationary with the assembly tool during rotation, thereby improving the assembly convenience of the lock nut 130.

It is understood that the number of the first abutting planes 1321 may be plural, and correspondingly, the number of the second abutting planes 1322 may also be plural, in other words, the outer contour of the axial projection of the annular boss 132 is a polygonal structure, such as a quadrilateral structure, a hexagonal structure, etc., which is more convenient for the assembling tool to clamp the annular boss 132.

Specifically, as shown in fig. 1, the external rotor electric machine 120 further includes a rotor 122, the rotor 122 includes a rotor disk 1221, the rotor disk 1221 has a stator cavity 12211, the stator 121 is disposed in the stator cavity 12211, and the rotor disk 1221 is an integrally formed component, that is, the rotor disk 1221 is manufactured by an integrally forming process. The rotor disc 1221 serves as a supporting member of the rotor 122, and by using the integrally formed rotor disc 1221, on one hand, the structural strength of the rotor 122 can be effectively improved, so that the operational reliability of the outer rotor compressor 100 can be effectively improved, on the other hand, the production flow of the outer rotor compressor 100 can be simplified, and the production efficiency can be improved.

The integral molding method includes, but is not limited to, a casting process and a die-casting process.

Specifically, as shown in fig. 1, the rotor 122 further includes a plurality of magnetic tiles 1222, and the magnetic tiles 1222 are sequentially disposed on the wall of the stator cavity 12211 around the axis of the rotor 122.

Specifically, a second shaft hole (not shown) is formed in a middle portion of rotor disc 1221, and one end of crankshaft 140 extends out of first shaft hole 1124 and then is fixedly connected to the second shaft hole, so that rotor 122 can drive crankshaft 140 to rotate.

The fixed connection between the crankshaft 140 and the rotor disc 1221 includes, but is not limited to, an interference fit method and a welding method.

Optionally, the bearing 112 and the shaft seat 111 are integrally formed, so that on one hand, the structural strength of the outer rotor compressor 100 can be effectively improved, and thus the working reliability of the outer rotor compressor 100 can be effectively improved, and on the other hand, the production process of the outer rotor compressor 100 can be simplified, and the production efficiency can be improved.

The integral molding method includes, but is not limited to, a casting process and a die-casting process.

The assembly process of the outer rotor compressor 100 described above is as follows:

the stator 121 is sleeved on the bearing 112, one side of the stator 121 facing the shaft seat 111 abuts against the positioning end surface 11221, then the lock nut 130 is in threaded connection with the threaded portion 11211 of the bearing 112, the lock nut 130 is pressed against one side of the stator 121 facing away from the positioning end surface 11221, so that the stator 121 is clamped between the positioning end surface 11221 and the lock nut 130, the stator 121 is fixed on the bearing 112, then the rotor 122 is installed on the stator 121, the stator 121 is placed in the stator cavity 12211, and finally the rotor 122 is fixedly connected with the crankshaft 140, so that the assembling process of the external rotor compressor 100 is completed.

A second aspect of the present invention provides a refrigeration apparatus including the above-described outer rotor compressor 100.

The refrigeration equipment includes, but is not limited to, an air conditioner and a refrigerator.

Since the refrigeration equipment adopts the outer rotor compressor 100 of any one of the above embodiments, at least the beneficial effects of the above embodiments are achieved, and no further description is given here.

The above description is intended to be illustrative of the preferred embodiment of the present invention and should not be taken as limiting the utility model, but rather, the intention is to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the utility model.

Claims (10)

1. The utility model provides an external rotor compressor, includes crankcase and external rotor electric machine, the crankcase includes axle bed and bearing, the bearing set up in on the axle bed, external rotor electric machine includes stator, its characterized in that: the outer rotor compressor further comprises a locking nut, a threaded portion is arranged at one end, far away from the shaft seat, of the bearing, the stator is sleeved on the bearing, the inner hole wall of the stator is in clearance fit with the outer peripheral face of the bearing, the locking nut is in threaded connection with the threaded portion, and the locking nut presses against the stator to enable the stator to be fixed with the bearing.

2. The external rotor compressor of claim 1, wherein: the bearing comprises a main body part and a base arranged on the shaft seat, the base is provided with a positioning end face, the main body part is connected to the positioning end face and extends towards the direction far away from the base, the threaded part is arranged at one end, far away from the base, of the main body part, the stator is sleeved on the main body part, the inner hole wall of the stator is in clearance fit with the outer peripheral face of the main body part, and the stator is abutted to the positioning end face.

3. The external rotor compressor of claim 2, wherein: the main body part and the base are integrally formed.

4. The external rotor compressor of claim 3, wherein: the connecting part between the main body part and the base is provided with a groove, and the groove is communicated with the positioning end face.

5. The external rotor compressor of claim 2, wherein: the difference between the axial distance between the end face of the main body part, which is far away from the shaft seat, and the positioning end face and the axial length of the central hole of the stator is smaller than or equal to the axial length of the threaded part.

6. The external rotor compressor of any of claims 1-5, wherein: the locking nut comprises a nut body and an annular boss, the nut body is used for being abutted to the stator, the annular boss is arranged on the outer peripheral wall of the nut body, and the annular boss surrounds the axis of the locking nut.

7. The external rotor compressor of claim 6, wherein: the periphery wall of cyclic annular boss is equipped with first butt plane and second butt plane, first butt plane with the mutual setting dorsad of second butt plane.

8. The external rotor compressor of any of claims 1-5, wherein: the outer rotor motor also comprises a rotor, wherein the rotor comprises a rotor disc, the rotor disc is provided with a stator cavity, the stator is arranged in the stator cavity, and the rotor disc is an integrally formed part.

9. The external rotor compressor of any of claims 1-5, wherein: the shaft seat and the bearing are integrally formed.

10. A refrigeration apparatus, characterized by: the refrigeration device comprises an external rotor compressor according to any of claims 1-9.

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