CN216812053U - 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. The stator is sleeved on the bearing and is in clearance fit with the peripheral surface of the bearing, 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 outer rotor compressor can be effectively improved; the stator is fixed on the bearing through the bolts, so that the mounting stability of the stator can be effectively ensured, and the working reliability of the external rotor compressor can be effectively improved.

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 the compressor adopting the external rotor motor, the stator of the external rotor motor is sleeved on the bearing of the crankcase and is fixedly connected with the bearing. At present, the fixed connection mode of a stator and a bearing is generally an interference fit connection mode and a welding mode, wherein the interference fit connection mode is generally that the stator is sleeved on the bearing in a cold pressing mode, and in the process, a shaft hole of the bearing is deformed due to compression, 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; in addition, for the welding mode, because the crankcase is generally made of cast iron, namely the bearing is also made of cast iron, and the iron core of the stator is generally made of silicon steel, the welding performance between the cast iron and the silicon steel is poor, the risk of stator falling exists, and the working reliability of the compressor is reduced.

SUMMERY OF THE UTILITY MODEL

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

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 the bolt, first connecting hole has been seted up on the bearing, the second connecting hole has been seted up on the stator, the stator cover is located on the bearing, and the inner hole wall of stator with the outer peripheral face clearance fit of bearing, the bolt passes the second connecting hole and stretches into form the connection in the first connecting hole, and will the stator is fixed in on the bearing.

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 is in clearance fit with the peripheral surface of the bearing, 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 outer rotor compressor can be effectively improved; meanwhile, the stator is fixed on the bearing through the bolts, so that the mounting stability of the stator can be effectively guaranteed, and the working reliability of the outer rotor compressor can be effectively improved.

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

In one embodiment, the first connection hole starts from the positioning end face and extends in the axial direction of the base.

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 number of the bolts, the number of the first connection holes, and the number of the second connection holes are respectively multiple, and the plurality of bolts, the plurality of first connection holes, and the plurality of second connection holes are in one-to-one correspondence.

In one embodiment, the first connection holes are evenly spaced around the axis of the bearing.

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 first connecting hole is a threaded hole, and the second connecting hole is a through hole; the bolt penetrates through the through hole and is connected into the threaded hole.

In order to achieve the above object, an embodiment of the present invention further provides a refrigeration apparatus, including the above external rotor compressor.

Because the refrigeration equipment adopts the outer rotor compressor of any one of the embodiments, the working stability and the working reliability of the refrigeration equipment can be effectively improved.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed for 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 to obtain other 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 stator of an outer rotor motor in the outer rotor compressor shown in fig. 1.

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; 1122. a base; 11221. a first connection hole; 11222. positioning the end face; 1123. a groove; 1124. a first shaft hole; 120. an outer rotor motor; 121. a stator; 1211. a second connection hole; 122. a rotor; 1221. a rotor disk; 12211. a stator cavity; 1222. a magnetic shoe; 130. a bolt; 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 are used in the orientations and positional relationships indicated in the drawings, which are based on the orientations and positional relationships indicated in the drawings, and are used for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, 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 explicitly stated or limited, the terms "mounted," "connected," "fixed," and the like are to be construed broadly, e.g., as being permanently connected, detachably connected, or integral; 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.

The first aspect of the present invention provides an outer rotor compressor 100, and the outer rotor compressor 100 may 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.

Referring to fig. 1 to 3, an outer rotor compressor 100 includes a crankcase 110, an outer rotor motor 120, a bolt 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 first connection hole 11221 is formed on the bearing 112, and a first shaft hole 1124 is formed in the middle of the bearing 112. Crankshaft 140 is disposed through first shaft hole 1124, and crankshaft 140 is rotatable within first shaft hole 1124. The outer rotor motor 120 includes a stator 121, the stator 121 is provided with a second connection hole 1211, the stator 121 is sleeved on the bearing 112, and the stator 121 is in clearance fit with the outer peripheral surface of the bearing 112, that is, after the stator 121 is sleeved on the bearing 112, a clearance exists between the inner hole wall of the stator 121 and the outer peripheral surface of the bearing 112. The bolts 130 pass through the second connection holes 1211 and extend into the first connection holes 11221 to form a connection, and fix the stator 121 to the bearing 112.

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.

By sleeving the stator 121 on the bearing 112 and allowing the stator 121 to be in clearance fit with the outer circumferential surface of the bearing 112, the first shaft hole 1124 of the bearing 112 is prevented from being deformed due to the stator 121 pressing the bearing 112, so that the working stability of the outer rotor compressor 100 can be effectively improved; meanwhile, the stator 121 is fixed to the bearing 112 by using the bolt 130, so that the installation stability of the stator 121 is effectively ensured, and the operational reliability of the outer rotor compressor 100 is effectively improved.

In one embodiment, please refer to fig. 2, the bearing 112 includes a main body portion 1121 and a base 1122 connected to the shaft seat 111, the base 1122 has a positioning end surface 11222, the main body portion 1121 is connected to the positioning end surface 11222, the main body portion 1121 extends in a direction 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 11222, so that a mounting position of the stator 121 can be effectively defined.

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

In the above embodiment, as shown in fig. 1 to fig. 3, the first connection hole 11221 starts at the positioning end surface 11222 and extends along the axial direction of the base 1122. It can be understood that the first connection hole 11221 extends along the axial direction of the bearing 112, and correspondingly, the second connection hole 1211 of the stator 121 penetrates through the two opposite end faces of the stator 121 along the axial direction of the stator 121, and after the stator 121 is sleeved on the main body portion 1121 and the stator 121 is abutted to the positioning end face 11222, the bolt 130 is connected to the first connection hole 11221 and the second connection hole 1211, so that the stator 121 can be tightly pressed on the positioning end face 11222, the mounting stability of the stator 121 can be further improved, and the operational reliability of the external rotor compressor 100 can be further improved.

Of course, in other embodiments, the first connection hole 11221 may be opened on the outer circumferential surface of the bearing 112, and accordingly, the second connection hole 1211 penetrates through the inner hole wall of the stator 121 from the outer circumferential surface of the stator 121 in the radial direction of the stator 121.

In the above embodiment, the main body portion 1121 and the base 1122 are integrally formed, so that on one hand, the structural strength of the bearing 112 can be effectively improved, and therefore, the operational 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, 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 11222, and therefore, a groove 1123 is formed at the connecting position between the main body portion 1121 and the base 1122, and the groove 1123 is connected to the positioning end surface 11222. 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 11222 of the bearing 112 after molding, and thus ensures that the stator 121 can be closely fitted to the end surface 11222.

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, etc., which are not specifically limited herein.

In an embodiment, referring to fig. 1, the number of the bolts 130, the number of the first connection holes 11221, and the number of the second connection holes 1211 are respectively multiple, for example, the number of the bolts 130, the number of the first connection holes 11221, and the number of the second connection holes 1211 are two, three, or four, the bolts 130, the first connection holes 11221, and the second connection holes 1211 are in one-to-one correspondence, in other words, each bolt 130 is connected to one first connection hole 11221 and one second connection hole 1211, so that a plurality of connection portions are formed between the bearing 112 and the stator 121, which can further improve the installation stability of the stator 121, and thus further improve the operational reliability of the outer rotor compressor 100.

In the above embodiment, the plurality of first connection holes 11221 are uniformly spaced around the axis of the bearing 112, and accordingly, the plurality of second connection holes 1211 are uniformly spaced around the axis of the stator 121, so that the installation stress of the stator 121 in the circumferential direction becomes more uniform, the installation stability of the stator 121 can be further improved, and the operational reliability of the outer rotor compressor 100 can be further improved.

In one embodiment, please refer to fig. 1, the external rotor electric machine 120 further includes a rotor 122, the rotor 122 includes a rotor disc 1221, the rotor disc 1221 has a stator cavity 12211, the stator 121 is disposed in the stator cavity 12211, and the rotor disc 1221 is an integrally formed part, that is, the rotor disc 1221 is manufactured by an integrally forming process. The rotor disc 1221 serves as a supporting component of the rotor 122, and the rotor disc 1221 formed integrally is used, so that the structural strength of the rotor 122 can be effectively improved, the operational reliability of the outer rotor compressor 100 can be effectively improved, 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.

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.

In one embodiment, as shown in fig. 1, the first connection holes 11221 are threaded holes, and the second connection holes 1211 are through holes; specifically, a screw hole penetrates through the base 1122 in the axial direction of the bearing 112, a through hole penetrates through both end surfaces of the stator 121 in the axial direction of the stator 121, and a bolt 130 passes through the through hole to be coupled in the screw hole to fix the stator 121 on the bearing 112.

Alternatively, the through hole is a countersunk through hole, so that the head of the bolt 130 can be placed in the countersunk through hole, thereby preventing the head of the bolt 130 from interfering with other components of the outer rotor compressor 100.

In one embodiment, a second shaft hole (not shown) is formed in a middle portion of rotor disk 1221 of rotor 122 of outer rotor compressor 100, and one end of crankshaft 140 extends out of first shaft hole 1124 and 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.

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

the stator 121 is sleeved on the main body portion 1121 of the bearing 112, and one side of the stator 121 facing the shaft seat 111 is abutted against the positioning end surface 11222 of the base 1122, then the first connection hole 11221 of the bearing 112 is aligned with the second connection hole 1211 of the stator 121, then the bolt 130 is connected into the first connection hole 11221 and the second connection hole 1211, so that the stator 121 is fixed on the bearing 112, then the rotor 122 is installed on the stator 121, so that the stator 121 is placed in the stator cavity 12211, and finally the rotor 122 is fixedly connected with the crankshaft 140, thereby completing the assembly process of the outer rotor compressor 100.

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.

After the refrigeration equipment adopts the external rotor compressor 100 of any of the embodiments, because the stator 121 of the external rotor compressor 100 is in clearance fit with the outer peripheral surface of the bearing 112, the situation that the first shaft hole 1124 of the bearing 112 is deformed due to the fact that the stator 121 extrudes the bearing 112 can be avoided, and meanwhile, because the stator is fixed on the bearing 112 by the bolt 130, the installation stability of the stator 121 can be effectively ensured, so that the working stability and the working reliability of the external rotor compressor 100 can be effectively improved, and the working stability and the working reliability of the refrigeration equipment can be improved accordingly.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the utility model, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.

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 bolt, a first connecting hole is formed in the bearing, a second connecting hole is formed in the stator, the stator is sleeved on the bearing, the inner hole wall of the stator is in clearance fit with the outer peripheral surface of the bearing, the bolt penetrates through the second connecting hole and extends into the first connecting hole to form connection, and the stator is fixed on the bearing.

2. The external rotor compressor of claim 1, wherein: the bearing comprises a main body part and a base connected to 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 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 first connecting hole starts from the positioning end face and extends in the axial direction of the base.

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

5. The external rotor compressor of claim 4, 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.

6. The external rotor compressor of claim 1, wherein: the number of the bolts, the number of the first connecting holes and the number of the second connecting holes are respectively multiple, and the bolts, the first connecting holes and the second connecting holes are in one-to-one correspondence.

7. The external rotor compressor of claim 6, wherein: the first connecting holes are uniformly distributed around the axis of the bearing at intervals.

8. The external rotor compressor of any of claims 1-7, 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 1-7, wherein: the first connecting hole is a threaded hole, and the second connecting hole is a through hole; the bolt penetrates through the through hole and is connected into the threaded hole.

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

Images