阅读说明：本技术 压缩机和具有该压缩机的制冷设备 (Compressor and refrigeration equipment with same ) 是由 曹银松 于 2018-08-30 设计创作，主要内容包括：本发明公开了一种压缩机和制冷设备。该压缩机包括：壳体,壳体包括主壳体；驱动电机,驱动电机设置在主壳体内,驱动电机包括定子和转子；压缩机构,压缩机构设置在主壳体内,压缩机构由驱动电机驱动,压缩机构包括靠近驱动电机的主轴承,其中主壳体的内周面的等效直径为D,主轴承具有朝向驱动电机的主轴承端面,定子的定子铁芯具有朝向主轴承的定子铁芯端面,主轴承端面与定子铁芯端面的等效距离为h,其中D和h满足关系式：0.37＜h/D＜0.45。根据本发明实施例的压缩机,可以有效避免电机转子和曲轴的轴向窜动,避免压缩机过大的轴向振动和异常噪音,又能较好地保证压缩机可靠性。(The invention discloses a compressor and refrigeration equipment. The compressor includes: a housing including a main housing; the driving motor is arranged in the main shell and comprises a stator and a rotor; compressing mechanism, compressing mechanism sets up in the main casing, and compressing mechanism is by driving motor drive, and compressing mechanism is including being close to driving motor's main bearing, and wherein the equivalent diameter of the inner peripheral surface of the main casing body is D, and the main bearing has the main bearing terminal surface towards driving motor, and the stator core of stator has the stator core terminal surface towards the main bearing, and the main bearing terminal surface is h with the equivalent distance of stator core terminal surface, and wherein D and h satisfy the relational expression: h/D is more than 0.37 and less than 0.45. According to the compressor provided by the embodiment of the invention, the axial movement of the motor rotor and the crankshaft can be effectively avoided, the overlarge axial vibration and abnormal noise of the compressor can be avoided, and the reliability of the compressor can be better ensured.)

1. A compressor, comprising:

a housing comprising a main housing;

the driving motor is arranged in the main shell and comprises a stator and a rotor;

the compression mechanism is arranged in the main shell and driven by the driving motor, the compression mechanism comprises a main bearing close to the driving motor, the equivalent diameter of the inner peripheral surface of the main shell is D, the main bearing is provided with a main bearing end surface facing the driving motor, a stator core of the stator is provided with a stator core end surface facing the main bearing, the equivalent distance between the main bearing end surface and the stator core end surface is h, and D and h satisfy the relation: h/D is more than 0.37 and less than 0.45.

2. The compressor of claim 1, wherein a partial shell of the main shell between the stator core end surface and the main bearing end surface is configured as a constant diameter structure, and the equivalent diameter D is a diameter of an inner circumferential surface of the partial shell.

3. The compressor of claim 1, wherein a partial shell of the main shell between the stator core end surface and the main bearing end surface is constructed in a variable diameter structure, and an inner circumferential surface of the partial shell of the variable diameter structure has a plurality of diameters D1, D2 … … Dn, and the equivalent diameter D is (D1+ D2+ … … + Dn)/n.

4. The compressor of claim 1, wherein the equivalent diameter D is no greater than 110 mm.

5. The compressor of claim 1, wherein the main bearing comprises: the main body part is suitable for being pressed against a cylinder of the compression mechanism, the supporting part is connected with the main body part and is used for supporting the crankshaft, the supporting part extends from a middle round hole of the main body part to the direction of a driving motor, the surface of the main body part facing the driving motor is a plane and is constructed as the end surface of the main bearing, and the distance between the plane and the end surface of the stator core is the equivalent distance h.

6. The compressor of claim 1, wherein the main bearing comprises: the main body part is suitable for being pressed against a cylinder of the compression mechanism, the supporting part is connected with the main body part and is used for supporting the crankshaft, the supporting part extends from a middle round hole of the main body part to the direction of a driving motor, the surface of the main body part facing the driving motor is non-planar and is constructed into a main bearing end surface, the main bearing end surface comprises a local end surface, the local end surface corresponds to the cylinder in the radial direction of the compression mechanism, and the distance between the local end surface and the stator core end surface is the equivalent distance h.

7. The compressor of claim 6, wherein the partial end face is a plane parallel to the stator core end face.

8. The compressor of claim 6, wherein the support part is connected to an inner side of the partial end surface and the connection part having a thicker thickness is connected to an outer side of the partial end surface, an outer circumferential surface of the connection part is connected to an inner circumferential surface of the main housing, and an outer circumferential edge of the partial end surface is flush with or located inside an outer circumferential surface of the cylinder.

9. The compressor of claim 1, wherein a maximum rotational speed of the driving motor does not exceed 10000 r/min.

10. A refrigeration device, characterized in that it comprises a compressor according to any one of claims 1-9.

Technical Field

The invention relates to the technical field of refrigeration, in particular to a compressor and refrigeration equipment with the same.

Background

The rotary compressor comprises a shell, a driving motor, a compression mechanism, the shell comprises an upper shell, a main shell body and a lower shell body, the three are assembled together to form a closed cavity, a motor stator and the compression mechanism are installed on the inner side of the main shell body through hot fitting or welding, a motor rotor is installed on a crankshaft of the compression mechanism, the motor rotor drives the crankshaft to rotate to drive the compression mechanism to perform compression movement, the compression mechanism sucks low-temperature and low-pressure gas, high-temperature and high-pressure gas is discharged after compression, the gas discharged by the compression mechanism flows into the cavity at the upper part of the motor from the cavity at the lower part of the motor through a gap of the motor, and then is discharged into a pipeline of a refrigeration system through an. The prior art compressor often has the problems of large vibration and noise, especially in the case of high-frequency operation, and the compressor is generally considered by those skilled in the art to be caused by the conventional working vibration of the motor and the compression mechanism.

Disclosure of Invention

As described in the background of the invention, it is widely believed in the industry that vibration of a compressor at a high rotation speed is caused by conventional vibration of a driving motor and a compression mechanism, and therefore, the prior art is concerned with reducing operation vibration of the motor and the compression mechanism for improving vibration and noise of the compressor at the high rotation speed, but the improvement is general for improving vibration of the compressor at the high rotation speed. The inventor of the application realizes based on years of industrial experience that the larger the resistance generated by gas passing through a channel between the upper cavity and the lower cavity of the motor is, the pressure difference and the pressure pulsation are generated between the lower cavity and the upper cavity of the motor, the pressure difference exists between the upper end surface and the lower end surface of the rotor, so the rotor is subjected to an upward gas force Fp due to the pressure difference, the sum of the downward gravity of the crankshaft and the rotor is Fg, the electromagnetic tension of the rotor on the stator is Fm, and Fg + Fm is more than Fp under the general condition, thereby the crankshaft is ensured to be continuously pressed on the upper end surface of the auxiliary bearing, but when the pressure difference between the upper cavity and the lower cavity of the motor or the pressure pulsation of the upper cavity and the lower cavity of the motor exceeds a certain value, the rotor of the motor drives the crankshaft to generate axial movement, which is represented on the compressor that the axial vibration of the compressor is large under the high rotating, therefore, the vibration condition of the compressor at high rotating speed is greatly improved, and the vibration noise is also greatly reduced.

Therefore, an object of the present invention is to provide a compressor capable of improving the technical problems of large axial vibration and high noise of the compressor at high rotation speed.

Another object of the present invention is to propose a refrigeration plant having the above compressor.

The compressor according to the embodiment of the present invention includes: a housing comprising a main housing; the driving motor is arranged in the main shell and comprises a stator and a rotor; the compression mechanism is arranged in the main shell and driven by the driving motor, the compression mechanism comprises a main bearing close to the driving motor, the equivalent diameter of the inner peripheral surface of the main shell is D, the main bearing is provided with a main bearing end surface facing the driving motor, a stator core of the stator is provided with a stator core end surface facing the main bearing, the equivalent distance between the main bearing end surface and the stator core end surface is h, and D and h satisfy the relation: h/D is more than 0.37 and less than 0.45.

Therefore, according to the compressor provided by the embodiment of the invention, D and h are set to satisfy 0.37 < h/D < 0.45, namely the space volume between the rotor and the main bearing is reasonably limited, the gas pressure of the lower cavity of the motor is moderate, and the pressure difference acting on the rotor is moderate, so that the axial movement of the motor rotor and the crankshaft can be effectively avoided, the overlarge axial vibration and abnormal noise of the compressor can be avoided, and the reliability of the compressor can be better ensured.

In some embodiments, a partial shell of the main shell between the stator core end face and the main bearing end face is configured as an equal diameter structure, and the equivalent diameter D is a diameter of an inner peripheral surface of the partial shell.

In some embodiments, a partial shell of the main shell between the stator core end surface and the main bearing end surface is configured as a variable diameter structure, and an inner circumferential surface of the partial shell of the variable diameter structure has a plurality of diameters D1, D2 … … Dn, and the equivalent diameter D is (D1+ D2+ … … + Dn)/n.

In some embodiments, the equivalent diameter D is no greater than 110 mm.

In some embodiments, the main bearing comprises: the main body part is suitable for being pressed against a cylinder of the compression mechanism, the supporting part is connected with the main body part and is used for supporting the crankshaft, the supporting part extends from a middle round hole of the main body part to the direction of a driving motor, the surface of the main body part facing the driving motor is a plane and is constructed as the end surface of the main bearing, and the distance between the plane and the end surface of the stator core is the equivalent distance h.

In some embodiments, the main bearing comprises: the main body part is suitable for being pressed against a cylinder of the compression mechanism, the supporting part is connected with the main body part and is used for supporting the crankshaft, the supporting part extends from a middle round hole of the main body part to the direction of a driving motor, the surface of the main body part facing the driving motor is non-planar and is constructed into a main bearing end surface, the main bearing end surface comprises a local end surface, the local end surface corresponds to the cylinder in the radial direction of the compression mechanism, and the distance between the local end surface and the stator core end surface is the equivalent distance h.

In some embodiments, the partial end face is a plane parallel to the stator core end face.

In some embodiments, the support portion is connected to the inner side of the partial end surface, and the connecting portion with a thickened thickness is connected to the outer side of the partial end surface, the outer circumferential surface of the connecting portion is connected to the inner circumferential surface of the main housing, and the outer circumferential edge of the partial end surface is flush with or located inside the outer circumferential surface of the cylinder.

In some embodiments, the maximum rotational speed of the drive motor does not exceed 10000 r/min.

The refrigeration equipment according to another embodiment of the invention comprises the compressor of the above embodiment.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

fig. 1 is an exemplary view of a compressor according to an embodiment of the present invention.

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 accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.

A compressor according to an embodiment of the present invention, which mainly includes a housing 1, a drive motor 2, and a compression mechanism 3, is described below with reference to fig. 1.

The housing 1 includes a main housing 12, an upper housing 11, and a lower housing 13, the upper housing 11 may be welded to close an upper end of the main housing 12, and the lower housing 13 may be welded to close a lower end of the main housing 12.

The driving motor 2 is disposed in the main housing 12, the driving motor 2 includes a stator 22 and a rotor 21, the stator 22 can be welded and fixed to the inner wall surface of the main housing 12, and the rotor 21 is rotatably disposed inside the stator 22.

The compression mechanism 3 is disposed in the main casing 12, and the compression mechanism 3 and the inner wall surface of the main casing 12 may be fixed by welding. For the single cylinder compression mechanism 3, it mainly includes a main bearing 31, a sub bearing 34 and a cylinder 32. The double-cylinder compression mechanism 3 mainly includes a main bearing 31, a sub bearing 34, two cylinders 32, and a middle partition 33 between the two cylinders 32. The main bearing 31 is a bearing on the side facing the drive motor 2, and the sub-bearing 34 is a bearing on the side facing away from the drive motor 2, and as in the example of fig. 1, the main bearing 31 is an upper bearing, and the sub-bearing 34 is a lower bearing.

The compression mechanism 3 is provided with a crankshaft, a rotor 21 of the driving motor 2 is connected with the crankshaft, and the crankshaft drives the compression mechanism 3 to operate, so that the refrigerant is compressed.

As described in the background of the invention, it is widely believed in the industry that the vibration of the compressor at high rotation speed is caused by the conventional vibration of the driving motor 2 and the compressing mechanism 3, so that the prior art is concerned with reducing the running vibration of the motor and the compressing mechanism for improving the vibration and noise problems of the compressor at high rotation speed, but the improvement is general to improve the vibration of the compressor at high rotation speed. Based on years of industrial experience, the inventor of the present application realizes that the larger the resistance generated by gas passing through the channel between the lower motor cavity 42 and the upper motor cavity 41, the pressure difference and the pressure pulsation are generated between the lower motor cavity 42 and the upper motor cavity 41, the pressure difference exists between the upper end surface and the lower end surface of the rotor 21, so that the rotor 21 receives an upward gas force Fp due to the pressure difference, the sum of the downward gravity of the crankshaft and the rotor 21 is Fg, the electromagnetic tension of the rotor 21 received by the stator 22 is Fm, generally Fg + Fm > Fp, thereby ensuring that the crankshaft is continuously pressed on the upper end surface of the secondary bearing 34, but when the pressure difference between the upper and lower motor cavities or the pressure pulsation of the upper and lower cavities exceeds a certain value, the motor rotor 21 drives the crankshaft to axially shift, which is reflected in that the compressor has large axial vibration and large noise at high rotation speed, that is, by improving (for example, properly reducing) the pressure difference force Fp acting on the rotor 21, therefore, the vibration of the crankshaft can be effectively relieved, the vibration condition of the compressor at a high rotating speed is greatly improved, and the vibration noise is also greatly reduced.

It is because the inventors have recognized the above technical problem, i.e., have found the problem, so that the inventors have paid more attention to how to improve the pressure Fp. Further, the inventors found that the above-mentioned technical problem can be solved by appropriately designing the relation between the equivalent diameter D of the inner peripheral surface of main housing 12 and the equivalent distance h between main bearing end surface 314 and stator core end surface 2211.

Preferably: d and h are set to satisfy the relation: h/D is more than 0.37 and less than 0.45.

Therefore, according to the compressor provided by the embodiment of the invention, D and h are set to satisfy 0.37 < h/D < 0.45, namely the space volume between the rotor 21 and the main bearing 31 is reasonably limited, the gas pressure of the lower cavity of the motor is moderate, and the pressure difference acting on the rotor 21 is moderate, so that the axial movement of the motor rotor 21 and a crankshaft can be effectively avoided, the overlarge axial vibration and abnormal noise of the compressor can be avoided, and the reliability of the compressor can be better ensured.

In some embodiments, the partial shell 121 of the main shell 12 between the stator core end 2211 and the main bearing end 314 is configured as a constant diameter structure, i.e. the diameter of the partial shell 121 section remains inconvenient, although in this embodiment, the entire main shell 12 may be a constant diameter structure. In this embodiment, the equivalent diameter D is therefore the diameter of the inner peripheral surface of the partial housing 121.

In other embodiments, which are not shown, the section of the partial housing 121 may be configured as a diameter-variable structure, that is, a diameter-variable structure, provided that the inner circumferential surface of the partial housing 121 of the diameter-variable structure has a plurality of diameters D1, D2 … … Dn, so that the equivalent diameter D in this embodiment is (D1+ D2+ … … + Dn)/n.

In some embodiments, the main bearing 31 includes a body portion 312 and a supporting portion 311, the body portion 312 is adapted to be pressed against the cylinder 32 of the compression mechanism 3, the supporting portion 311 is connected to the body portion 312 and is configured to support the crankshaft, the supporting portion 311 extends from a central circular hole of the body portion 312 toward a direction close to the driving motor 2, a surface of the body portion 312 facing the driving motor 2 is non-planar and is configured as a main bearing end surface 314, the main bearing end surface 314 includes a partial end surface 3141, the partial end surface 3141 may be annular and corresponds to the cylinder 32 in a radial direction of the compression mechanism 3, and a distance between the partial end surface 3141 and the stator core end surface 2211 is an equivalent distance h. The partial end face 3141 may be a plane parallel to the stator core end face 2211. And a partial end face 3141 may be provided with a vent hole.

The inner side of partial end face 3141 is connected with supporting portion 311 and the outer side is connected with connecting portion 313 with a thicker thickness, the outer circumferential surface of connecting portion 313 is connected with the inner circumferential surface of main housing 12, and the outer circumferential edge of partial end face 3141 is flush with the outer circumferential surface of cylinder 32 or is located inside the outer circumferential surface of cylinder 32.

In other embodiments, not shown, the main bearing 31 includes a body 312 and a supporting portion 311, the body 312 is adapted to be pressed against the cylinder 32 of the compression mechanism 3, the supporting portion 311 is connected to the body 312 and is used for supporting the crankshaft, the supporting portion 311 extends from a central circular hole of the body 312 toward the driving motor 2, a surface of the body 312 facing the driving motor 2 is a plane and is configured as a main bearing end surface 314, and the plane is at an equivalent distance h from the stator core end surface 2211.

In some embodiments, the equivalent diameter D is not greater than 110mm, and the maximum rotational speed of the drive motor 2 is not greater than 10000 r/min.

A refrigeration device according to another embodiment of the present invention may include the compressor of the above-described embodiment.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While embodiments of the invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.