Power device and air conditioning system

Abstract

The utility model discloses a power plant and air-conditioning system, including shell, stator, shaft body, rotor and cover body, stator is provided in the shell, rotor sleeve is provided in the peripheral side of shaft body and is located in the stator, the cover body sleeve is provided in the peripheral side of shaft body and is located in the shell, and the cover body is located in the shell. One of the inner peripheral wall of the shell and the outer peripheral wall of the cover body is provided with a positioning hole, the other one of the inner peripheral wall of the shell and the outer peripheral wall of the cover body is provided with a positioning part, and the positioning part is arranged in the positioning hole in a matched mode so that the cover body and the shell can be assembled and fixed. The electromagnetic noise of the power device is low, and part of components can be reused conveniently.

Description

Technical Field

[0001] The utility model relates to the technical field of positioning and assembly, in particular to a power device and an air conditioning system. Background Art

[0002] The compressor is the heart of the refrigeration system. During use, it can boost low-pressure gas to high-pressure gas, thereby providing power for the refrigeration cycle. However, the compressor in the related art has problems such as high electromagnetic noise and inconvenience in recycling and reuse. Utility Model Content

[0003] The utility model aims to solve one of the technical problems in the related art at least to a certain extent.

[0004] To this end, an embodiment of the utility model provides a power device, which has low electromagnetic noise and is also convenient for the reuse of some components.

[0005] The embodiment of the utility model also provides an air conditioning system including the above-mentioned power device.

[0006] The power device of the utility model embodiment comprises:

[0007] case;

[0008] a stator, the stator being disposed in the housing;

[0009] A shaft body and a rotor, wherein the rotor is sleeved on the outer circumference of the shaft body and located inside the stator;

[0010] A cover body, wherein the cover body is sleeved on the outer peripheral side of the shaft body and is located in the shell, one of the inner peripheral wall of the shell and the outer peripheral wall of the cover body is provided with a positioning hole, and the other is provided with a positioning portion, and the positioning portion is engaged in the positioning hole to realize the assembly and fixation of the cover body and the shell.

[0011] In some embodiments, the positioning hole is a blind hole, the positioning hole is provided in the shell, and the opening of the positioning hole is located on the inner peripheral wall of the shell, and at least part of the positioning portion protrudes from the outer peripheral wall of the cover body.

[0012] In some embodiments, the shell is provided with a through hole penetrating the shell wall of the shell, and the opening of the through hole located on the outer peripheral wall of the shell is welded and sealed to construct the blind hole.

[0013] In some embodiments, a welding spot is provided on the outer peripheral wall of the shell, the opening of the through hole located on the outer peripheral wall of the shell is sealed by the welding spot, and the welding spot and the positioning portion are arranged at intervals.

[0014] In some embodiments, the positioning portion is detachably assembled with the cover body.

[0015] In some embodiments, an outer peripheral wall of the cover body is provided with an assembly hole, and the positioning portion is plugged and assembled in the assembly hole.

[0016] In some embodiments, the surface of the end of the positioning portion facing the positioning hole is an arc surface.

[0017] In some embodiments, the radius R of the circle corresponding to the arc surface is in the range of 1 mm ≤ R ≤ 10 mm.

[0018] In some embodiments, the shell has an inner diameter d1 during thermal expansion and an inner diameter d2 during thermal contraction, and the outer peripheral wall of the cover body is provided with a plurality of the positioning portions, the plurality of the positioning portions are arranged at intervals along the circumference of the cover body, and the free ends of the plurality of the positioning portions are located on the same base circle, and the diameter of the base circle is D, d2<D<d1.

[0019] In some embodiments, one of the shell and the cover body is provided with a plurality of positioning hole groups arranged at intervals along the circumference of the power device, each of the positioning hole groups includes a plurality of positioning holes arranged at intervals along the axial direction of the power device, and the other one is provided with a plurality of positioning portion groups arranged at intervals along the circumference of the power device, each of the positioning portion groups includes a plurality of positioning portions arranged at intervals along the axial direction of the power device, and the plurality of positioning hole portions are plugged and matched in the plurality of positioning holes one by one.

[0020] In some embodiments, the power device is a compressor, the compressor includes a pump body assembly, the pump body assembly includes a crankshaft and a bearing cover, the crankshaft forms the shaft body, and the bearing cover forms the cover body.

[0021] The air conditioning system of the embodiment of the utility model includes a power device as described in any of the above embodiments.

[0022] Beneficial effects: The power device of the embodiment of the utility model and the air-conditioning system including the power device have good coaxiality between the rotor and the stator, low overall electromagnetic noise, and can also realize the recycling and reuse of components, thereby reducing the cost of use. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the assembly of the housing and the cover of the power device of the embodiment of the utility model.

[0024] Figure 2 It is a schematic diagram of the thermal expansion assembly of the power device of the embodiment of the utility model.

[0025] Figure 3It is a schematic diagram of the assembled power device of the embodiment of the utility model.

[0026] Figure 4 It is a schematic diagram of the arrangement of welding points on the shell of the power device of an embodiment of the utility model.

[0027] Figure 5 It is a three-dimensional schematic diagram of a cover body of an embodiment of the utility model.

[0028] Figure 6 It is a schematic diagram of the end surface of the cover body of the embodiment of the utility model.

[0029] Reference numerals:

[0030] 1-shell; 11-positioning hole; 2-cover; 21-assembly hole; 3-positioning part; 31-arc surface; 4-stator; 5-shaft body; 6-rotor; 7-gap gauge; 8-welding point. DETAILED DESCRIPTION

[0031] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but cannot be understood as limiting the present invention.

[0032] The present invention is based on the inventor's discovery and understanding of the following facts and problems:

[0033] When the compressor is being processed, the flange (bearing cover) of the compressor pump body assembly and the compressor casing need to be assembled and fixed. The current method is to directly weld the flange and the compressor casing together. Since it is difficult to ensure complete consistency in welding parameters, each welding point is prone to uneven force and large differences. At this time, the rotor part connected to the pump body assembly will be offset, resulting in poor coaxiality between the rotor part and the stator part, and uneven distribution of the gap between the stator part and the rotor part, which in turn causes the compressor to have a large electromagnetic noise problem during use.

[0034] Secondly, since the shell and the flange are directly welded and fixed, it is difficult to disassemble the pump body assembly and the shell, which makes it inconvenient to recycle and reuse the pump body assembly.

[0035] The power device of the embodiment of the utility model is described below.

[0036] like Figures 1 to 3 As shown, the power device of the embodiment of the utility model comprises a housing 1, a cover 2, a stator 4, a shaft 5 and a rotor 6. The stator 4 is arranged in the housing 1. For example, the housing 1 can be generally cylindrical, and the material of the housing 1 is metal. The stator 4 can be annular, such as Figure 2As shown, the stator 4 can be fixed in the housing 1. Specifically, the stator 4 can be assembled in the housing 1 by shrink fitting.

[0037] The rotor 6 is sleeved on the outer circumference of the shaft 5 and is located inside the stator 4. Figure 2 and Figure 3 As shown, the shaft body 5 is an axis, and the rotor 6 can be assembled on the outer peripheral side of the shaft body 5 by shrink fitting, and then the rotor 6 and the shaft body 5 can be inserted into the inner hole of the stator 4, and the rotor 6, the shaft body 5, and the stator 4 can be roughly coaxially arranged.

[0038] The cover body 2 is sleeved on the outer peripheral side of the shaft body 5 and is located in the housing 1. For example, Figure 2 and Figure 3 As shown, the cover body 2 can be located at the bottom of the shaft body 5 and assembled in the annular space between the shaft body 5 and the housing 1. One of the inner peripheral wall of the housing 1 and the outer peripheral wall of the cover body 2 is provided with a positioning hole 11, and the other is provided with a positioning portion 3, and the positioning portion 3 is matched in the positioning hole 11 to realize the assembly and fixation of the cover body 2 and the housing 1.

[0039] Specifically, the positioning hole 11 can be provided on the outer peripheral wall of the cover body 2, and a plurality of positioning holes 11 can be provided, and the plurality of positioning holes 11 can be arranged at equal intervals along the circumferential direction of the cover body 2. The positioning portion 3 can be provided on the inner peripheral wall of the shell 1, and a plurality of positioning portions 3 can be provided, and the plurality of positioning portions 3 can be arranged at equal intervals along the circumferential direction of the shell 1.

[0040] When assembling, Figure 2 As shown, the stator 4 can first be assembled in the housing 1 by shrink fitting, and the rotor 6 can be shrink fitted on the outer peripheral side of the shaft 5, and then the housing 1 can be heated. At this time, the housing 1 will expand in the radial direction, and then the whole formed by the rotor 6, the shaft 5, and the cover body 2 can be inserted into the housing 1, wherein the rotor 6 and the shaft 5 will fit in the inner hole of the stator 4.

[0041] After the shell 1 cools down, Figure 3 As shown, at this time, the plurality of positioning portions 3 are plugged and assembled in the plurality of positioning holes 11 one by one, and the assembly and fixation of the cover 2 and the housing 1 can be achieved by the cooperation between the positioning portions 3 and the positioning holes 11 .

[0042] It should be noted that in order to ensure the clearance assembly accuracy between the rotor 6 and the stator 4, Figure 2 As shown, before the rotor 6, the shaft 5, and the cover 2 are inserted into the housing 1, a clearance gauge 7 needs to be provided on the outer circumference of the rotor 6. Figure 3 As shown, the gap gauge 7 can be inserted into the inner hole of the stator 4 synchronously with the rotor 6. After the two parts are plugged and assembled, the gap gauge 7 can be pulled out from the top of the housing 1.

[0043] In the power device of the embodiment of the utility model, the shell 1 and the cover 2 (which can be regarded as the bearing cover) are installed and fixed by means of plug-in assembly of the positioning portion 3 and the positioning hole 11, thereby avoiding the situation in the prior art where the rotor 6 is easily eccentric due to the difference in welding parameters at various welding positions when connected by welding, thereby ensuring the coaxiality of the rotor 6 and the stator 4, and improving the situation of large electromagnetic noise caused by the uneven distribution of the gap between the rotor 6 and the stator 4.

[0044] Secondly, compared with the welding connection method, the connection method of the positioning portion 3 and the positioning hole 11 makes the shell 1 and the cover body 2 detachable. When the shell 1 is damaged, the cover body 2 can be removed from the shell 1, so that the components can be recycled and reused, reducing the overall cost and providing convenience for the maintenance of the power device.

[0045] In some embodiments, Figure 1 As shown, the positioning hole 11 is provided in the shell 1, and the opening of the positioning hole 11 is located on the inner circumferential wall of the shell 1. The positioning hole 11 is a blind hole. For example, the positioning hole 11 can extend along the radial direction of the shell 1. The positioning hole 11 can be formed by drilling a hole in the inner circumferential wall of the shell 1, and the end of the positioning hole 11 facing the outside of the shell 1 is not connected to the outer circumferential wall of the shell 1.

[0046] At least part of the positioning portion 3 protrudes from the outer peripheral wall of the cover body 2. For example, the positioning portion 3 can be integrally formed on the outer peripheral wall of the cover body 2, in which case the positioning portion 3 completely protrudes from the outer peripheral wall of the cover body 2. During assembly, the positioning portion 3 can be directly inserted and assembled into the corresponding positioning hole 11 by thermal expansion.

[0047] It should be noted that the blind hole design of the positioning hole 11 can ensure sealing, and avoids the need to use additional components to seal the outward opening of the positioning hole 11 when a through hole design is used, which simplifies the process and helps reduce production costs.

[0048] In some embodiments, the housing 1 is provided with a through hole penetrating the housing wall of the housing 1, and the opening of the through hole located on the outer peripheral wall of the housing 1 is welded and sealed to construct a blind hole. Figure 4 As shown, during processing, a through hole can be firstly drilled on the shell wall of the shell 1 by drilling, and then the opening of the through hole toward the outside can be sealed by welding, and the welded area forms a welding point 8, thereby, the remaining through hole portion forms the above-mentioned blind hole, that is, the positioning hole 11 is constructed. The welding method has a high structural strength, thereby fully meeting the use requirements of the airtightness of the shell 1.

[0049] It should be noted that the through hole opening can be sealed by welding before the rotor 6, shaft 5, cover 2, and gap gauge 7 are assembled into the housing 1 as a whole, thereby reducing the impact of the welding process on the overall assembly accuracy.

[0050] In some embodiments, a welding point 8 is provided on the outer peripheral wall of the housing 1, and the opening of the through hole on the outer peripheral wall of the housing 1 is sealed by the welding point 8, and the welding point 8 and the positioning portion 3 are arranged at intervals. Figure 4 As shown, a welding point 8 is provided at the outer opening of each through hole, and the welding point 8 at each through hole and the positioning portion 3 inserted into the through hole from the inner opening of the through hole can be spaced apart, that is, a certain distance is spaced between the welding point 8 and the corresponding positioning portion 3, thereby eliminating the effect of the welding point 8 on the cover body 2, and further eliminating the influence on the assembly of the stator 4 and the rotor 6. It should be noted that this scheme is mainly aimed at the processing method after the overall plug-in assembly formed by welding the rotor 6, the shaft body 5, the cover body 2, and the gap gauge 7 is assembled in the shell 1.

[0051] In some embodiments, the positioning portion 3 is detachably assembled with the cover body 2. For example, the positioning portion 3 can be fixed to the outer peripheral side of the cover body 2 by threaded assembly, plug-in, etc. Such a design can improve the convenience of processing and is also conducive to the replacement of parts.

[0052] In some embodiments, the outer peripheral wall of the cover body 2 is provided with an assembly hole 21, and the positioning portion 3 is inserted and assembled in the assembly hole 21. Figure 1 As shown, the outer peripheral wall of the cover body 2 can be processed into a plurality of assembly holes 21 by drilling, each assembly hole 21 can extend along the radial direction of the cover body 2, and the aperture of each assembly hole 21 can be slightly larger than the radial dimension of the positioning portion 3. During assembly, the positioning portion 3 can be directly plugged and assembled into the corresponding positioning hole 11, thereby improving the convenience of assembly.

[0053] In some embodiments, the surface of the end of the positioning portion 3 facing the positioning hole 11 is an arc surface. Figure 1 As shown, the outer end of the positioning portion 3 can be hemispherical, and the surface of the hemispherical positioning portion 3 is an arc surface. Thus, the scratches between the positioning portion 3 and the housing 1 during shrink-fit assembly can be reduced, the generation of metal impurities that affect the overall performance can be avoided, and the convenience of assembly is further improved.

[0054] In some embodiments, the radius R of the circle corresponding to the arc surface is in the range of 1 mm ≤ R ≤ 10 mm. Within this size range, the radius R can be adapted to the size of existing power devices such as compressors, and can also meet the use requirements of plug-in assembly and fixed installation. Specifically, the radius R can be 1 mm, 2 mm, 4 mm, 5 mm, 7 mm, 9 mm, 10 mm, etc.

[0055] In some embodiments, the housing 1 has an inner diameter d1 when it is thermally expanded and an inner diameter d2 when it is cold contracted, and the outer peripheral wall of the cover 2 is provided with a plurality of positioning portions 3, which are arranged at intervals along the circumference of the cover 2, and the free ends of the plurality of positioning portions 3 (which can be regarded as the vertices of the arc surface of the positioning portions 3) are located on the same base circle, and the diameter of the base circle is D, d2<D<d1. Thus, the use requirements of shrink fit assembly are fully met.

[0056] In some embodiments, one of the shell 1 and the cover body 2 is provided with a plurality of positioning hole groups arranged at intervals along the circumference of the power device, each positioning hole group includes a plurality of positioning holes 11 arranged at intervals along the axial direction of the power device, and the other is provided with a plurality of positioning portion groups arranged at intervals along the circumference of the power device, each positioning portion group includes a plurality of positioning portions 3 arranged at intervals along the axial direction of the power device, and the plurality of positioning holes 11 are plugged and matched in the plurality of positioning holes 11 one by one.

[0057] For example, Figure 5 and Figure 6 As shown, there can be three positioning portion groups, and the three positioning portion groups can be arranged at equal intervals along the circumference of the cover body 2, that is, the central angle corresponding to two adjacent positioning portion groups is 120 degrees. Each positioning portion group can include two positioning portions 3, and the two positioning portions 3 can be arranged linearly and along the axial direction of the cover body 2 (which can be regarded as Figure 2 and Figure 3 In the up and down directions) they are arranged at intervals.

[0058] Correspondingly, the housing 1 is also provided with three positioning hole groups, which can be arranged at equal intervals along the circumference of the housing 1, and each positioning hole group can include two positioning holes 11, which can be arranged along the axial direction of the housing 1 (which can be regarded as Figure 2 and Figure 3 In the up and down directions) they are arranged at intervals.

[0059] During shrink fit, the two positioning parts 3 of each positioning part group can be respectively matched at the positioning holes 11 of the corresponding positioning hole group. The linear distribution of the multiple positioning parts 3 and the multiple positioning holes 11 can prevent the cover body 2 from deflecting, thereby further ensuring the coaxiality of the rotor 6 and the stator 4, and can also increase the limit matching points between the housing 1 and the cover body 2, thereby enhancing the structural strength of the assembly.

[0060] In some other embodiments, the number of the positioning portion groups and the positioning hole groups may be four, five, six, etc., and the number of the positioning portions 3 and the positioning holes 11 in each positioning portion group and each positioning hole group may be three, four, etc.

[0061] In some embodiments, the power device is a compressor, the compressor includes a pump body assembly, the pump body assembly includes a crankshaft and a bearing cap, the crankshaft forms a shaft body 5, and the bearing cap forms a cover body 2. In some other embodiments, the power device can also be a power device including a rotor 6 and a stator 4, such as a motor.

[0062] The air conditioning system according to the embodiment of the present utility model is described below.

[0063] The air conditioning system of the embodiment of the utility model includes a power device, which can be a power device as described in any of the above embodiments. The power device is specifically a compressor. The air conditioning system can be a central air conditioner, a wall-mounted air conditioner, a cabinet air conditioner, etc., and of course it can also be other air conditioning systems equipped with a power device.

[0064] Although the above embodiments have been shown and described, it is to be understood that the above embodiments are illustrative and cannot be construed as limitations on the present invention. Changes, modifications, substitutions and variations of the above embodiments by those of ordinary skill in the art are all within the scope of protection of the present invention.

Claims

1. A power device, characterized in that: include: case; a stator, the stator being disposed in the housing; A shaft body and a rotor, wherein the rotor is sleeved on the outer circumference of the shaft body and located inside the stator; A cover body, wherein the cover body is sleeved on the outer peripheral side of the shaft body and is located in the shell, one of the inner peripheral wall of the shell and the outer peripheral wall of the cover body is provided with a positioning hole, and the other is provided with a positioning portion, and the positioning portion is engaged in the positioning hole to realize the assembly and fixation of the cover body and the shell.

2. The power device according to claim 1, characterized in that: The positioning hole is a blind hole, the positioning hole is arranged in the shell, and the opening of the positioning hole is located on the inner peripheral wall of the shell, and at least part of the positioning portion protrudes from the outer peripheral wall of the cover body.

3. The power device according to claim 2, characterized in that: The shell is provided with a through hole penetrating the shell wall of the shell, and the opening of the through hole located on the outer peripheral wall of the shell is welded and sealed to construct the blind hole.

4. The power device according to claim 3, characterized in that: A welding spot is arranged on the outer peripheral wall of the shell, the opening of the through hole located on the outer peripheral wall of the shell is sealed by the welding spot, and the welding spot and the positioning part are arranged at intervals.

5. The power device according to claim 2, characterized in that: The positioning portion is detachably assembled with the cover body.

6. The power device according to claim 5, characterized in that: The outer peripheral wall of the cover body is provided with an assembly hole, and the positioning portion is inserted and assembled in the assembly hole.

7. The power device according to claim 2, characterized in that: The surface of the end portion of the positioning portion facing the positioning hole is an arc surface.

8. The power device according to claim 7, characterized in that: The range of the radius R of the circle corresponding to the arc surface is: 1mm≤R≤10mm.

9. The power device according to claim 2, characterized in that: The shell has an inner diameter d1 during thermal expansion and an inner diameter d2 during thermal contraction. The outer peripheral wall of the cover body is provided with a plurality of positioning portions, and the plurality of positioning portions are arranged at intervals along the circumference of the cover body, and the free ends of the plurality of positioning portions are located on the same base circle, and the diameter of the base circle is D, d2<D<d1.

10. The power device according to claim 1, characterized in that: One of the shell and the cover is provided with a plurality of positioning hole groups arranged at intervals along the circumference of the power device, each of the positioning hole groups includes a plurality of positioning holes arranged at intervals along the axial direction of the power device, and the other is provided with a plurality of positioning portion groups arranged at intervals along the circumference of the power device, each of the positioning portion groups includes a plurality of positioning portions arranged at intervals along the axial direction of the power device, and the plurality of positioning hole portions are plugged and fitted into the plurality of positioning holes one by one.

11. The power device according to any one of claims 1 to 10, characterized in that: The power device is a compressor, and the compressor includes a pump body assembly. The pump body assembly includes a crankshaft and a bearing cover. The crankshaft forms the shaft body, and the bearing cover forms the cover body.

12. An air conditioning system, characterized in that: It comprises a power device as described in any one of claims 1 to 11 above.

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