Motor cooling device of refrigeration compressor

Abstract

The utility model discloses a motor cooling device of a refrigeration compressor, which belongs to the technical field of motors and comprises a motor shell, a motor rotor, a motor stator and a transmission shaft, a sprayer is fixedly mounted in the middle of a cover body, a spraying main pipe is fixedly mounted at the output end of the sprayer and extends into the cover body, and the spraying main pipe is fixedly connected with the motor shell. The spraying device comprises a spraying main pipe, long fan blades are rotatably connected to the spraying main pipe, spraying branch pipes are fixedly connected to the side wall of the spraying main pipe, short fan blades are rotatably connected to the spraying branch pipes, a first outer gear ring is fixedly connected between the other ends of the long fan blades, and the first outer gear ring can drive the short fan blades to rotate. According to the utility model, the long fan blades and the short fan blades rotate synchronously, so that the sprayed vaporific refrigerant can quickly circulate in the motor, the spraying effect is quicker and more uniform, the cooling rate is further enhanced, and the technical effect of effectively improving the cooling efficiency is achieved.

Description

Technical Field

[0001] The utility model belongs to the technical field of motors, and particularly relates to a motor cooling device for a refrigeration compressor. Background Art

[0002] A refrigeration compressor is the core and heart of a refrigeration system. Refrigeration compressors are widely used in fields such as food quick-freezing, freeze-drying of pharmaceuticals and food, ultra-low temperature cold storage, and ship refrigeration. When a refrigeration compressor is running, heat dissipation problems will inevitably occur. Therefore, it is necessary to cool the motor of the compressor to avoid overheating. For high-power compressors, the heat dissipation of the stator and rotor in the machine body will be greater. If effective cooling cannot be achieved, it is easy to cause the temperature in the compressor body to rise, which has a very great impact on the efficiency of the compressor motor, the service life of the motor, and the safe use of refrigerants and lubricating oils.

[0003] For this reason, the Chinese utility model authorized patent with the patent number CN207069816 discloses a motor cooling mechanism for a refrigeration compressor, including a motor housing, a stator, an end cover, a cooling sleeve, a sprayer, and a liquid injector. The end cover is provided at the open end of the motor housing. The cooling sleeve is sleeved on the stator and is arranged between the stator and the motor housing. The material of the cooling sleeve is aluminum alloy. The sprayer and the liquid injector are respectively arranged on the end cover. The sprayer is arranged at the center of the end cover. The sprayer and the liquid injector respectively extend from the outside of the motor housing into the inside of the motor housing. Grooves are provided on the outer side wall of the cooling sleeve. The control program preset on the PLC controller turns on the switch of the sprayer. The sprayer sprays fog-like refrigerant onto the motor to cool the motor. At the same time, the program on the PLC controller adjusts the opening, closing, and opening degree of the first regulating valve through the first solenoid valve according to the real-time temperature, and further adjusts the amount of refrigerant sprayed by the sprayer.

[0004] However, the fog-like refrigerant directly sprayed by the sprayer is not conducive to quickly and comprehensively reaching all parts of the motor, and it is easy to cause uneven spray cooling inside the motor, thereby easily affecting the cooling and heat dissipation effect of the motor. Summary of the Utility Model

[0005] Aiming at the problems existing in the prior art, the utility model provides a motor cooling device for a refrigeration compressor, which has the advantages that the long fan blade and the short fan blade rotate synchronously, so as to facilitate the rapid circulation of the sprayed fog-like refrigerant inside the motor, making the spray effect faster and more uniform, further enhancing the cooling rate, and thus effectively improving the cooling efficiency. It solves the problem that uneven spray cooling occurs inside the motor in the prior art, which is likely to affect the cooling and heat dissipation effect of the motor.

[0006] The present utility model is realized as follows. A motor cooling device for a refrigeration compressor includes a motor housing, a motor rotor, a motor stator, and a transmission shaft. The transmission shaft is fixedly connected to the middle of the motor rotor. A cooling sleeve is sleeved between the motor housing and the motor stator. One end of the motor housing is fixedly connected to a cover body by bolts. A sprayer is fixedly installed in the middle of the cover body. The output end of the sprayer is fixedly installed with a main spray pipe. The main spray pipe extends into the interior of the cover body. A long fan blade is rotatably connected to the main spray pipe. A spray branch pipe is fixedly connected to the side wall of the main spray pipe. A short fan blade is rotatably connected to the spray branch pipe. One end of the transmission shaft extends into the interior of the cover body. The transmission shaft is fixedly connected to the long fan blade through a support rod. A first external toothed ring is fixedly connected between the other ends of the long fan blades. The first external toothed ring can drive the short fan blades to rotate.

[0007] Preferably, a liquid inlet and a liquid outlet are provided on the cooling sleeve. A spiral cooling groove is integrally formed on the outer wall of the cooling sleeve. The spiral cooling groove is communicated with the liquid inlet and the liquid outlet.

[0008] With this setting, during use, when cooling work is carried out, the liquid refrigerant is placed into the spiral cooling groove through the liquid inlet and coils around the inside of the motor in a spiral shape, thereby facilitating a full - range cooling effect inside the motor. Finally, the liquid refrigerant is discharged through the liquid outlet.

[0009] Preferably, a main rotating ring is sleeved on the main spray pipe through a bearing. The long fan blade is fixedly connected to the main rotating ring. The two ends of the support rod are respectively fixedly connected to the main rotating ring and the transmission shaft. A support rotating ring is sleeved on the spray branch pipe through a bearing. The short fan blade is fixedly connected to the support rotating ring. A second external toothed ring is fixedly sleeved on the outer wall of the support rotating ring. The second external toothed ring and the first external toothed ring are meshed with each other.

[0010] With this setting, during use, through the mutual meshing of the first external toothed ring and the second external toothed ring, when the transmission shaft rotates, it is convenient to drive the second external toothed ring to rotate through the first external toothed ring, thereby driving the main rotating ring and the support rotating ring to rotate, so as to drive the long fan blade and the short fan blade to rotate synchronously. Thus, it is convenient for the sprayed mist - shaped refrigerant to quickly circulate inside the motor, making the spraying effect faster and more uniform, further enhancing the cooling rate, and thus effectively improving the cooling efficiency.

[0011] Preferably, the spray opening end of the main spray pipe corresponds to the middle position of the motor housing. The spray opening end of the spray branch pipe corresponds to the edge position of the motor housing. The short fan blade corresponds to the position of the cooling sleeve.

[0012] With this setting, during use, the long fan blades are located at the middle position inside the motor, and the short fan blades are located at the edge position inside the motor, thereby facilitating the enhancement of the cooling effect in all aspects inside the motor, making the spray cooling uniform and conducive to improving the cooling efficiency.

[0013] Preferably, three short fan blades are set as a group, and each group of the short fan blades is evenly distributed in an annular array.

[0014] With this setting, during use, when each group of short fan blades rotates, it is convenient to accelerate the flow rate of the fog-shaped cooler inside the motor, making the spray cooling effect more uniform and effective.

[0015] Preferably, spray holes are provided on both the spray main pipe and the spray branch pipes. The spray opening end and the spray holes of the spray main pipe are respectively located on both sides of the long fan blades, and the spray opening end and the spray holes of the spray branch pipes are respectively located on both sides of the short fan blades.

[0016] With this setting, during use, the fog-shaped cooler is simultaneously sprayed through the opening ends and the spray holes on the spray main pipe and the spray branch pipes, facilitating the dispersion of the fog-shaped refrigerant in all corners inside the motor, which is conducive to further enhancing the spray cooling effect.

[0017] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0018] The liquid refrigerant is placed into the spiral cooling groove through the liquid inlet and spirally winds and circulates inside the motor, facilitating the improvement of the all-round cooling effect inside the motor. At the same time, the fog-shaped refrigerant is sprayed out through the sprayer and is sprayed in multiple directions from the spray main pipe and the spray branch pipes. During operation, the transmission shaft of the motor drives the long fan blades and the short fan blades to rotate synchronously through the cooperation of the support rod, the main rotating ring, the support rotating ring, the first external gear ring and the second external gear ring, so as to facilitate the rapid circulation of the sprayed fog-shaped refrigerant inside the motor, making the spray effect faster and more uniform, further enhancing the cooling rate, and thus effectively improving the cooling efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is the overall structural schematic diagram provided by the embodiment of the present utility model;

[0020] Figure 2 is the sectional three-dimensional structural schematic diagram provided by the embodiment of the present utility model;

[0021] Figure 3 is the structural schematic diagram of the first external gear ring provided by the embodiment of the present utility model;

[0022] Figure 4 is provided by the embodiment of the present utility model Figure 3 The enlarged structural schematic diagram at position A in

[0023] In the figure: 1. Motor housing; 2. Motor stator; 3. Motor rotor; 4. Transmission shaft; 5. Cover body; 6. Main spray pipe; 7. Spray branch pipe; 8. First external gear ring; 9. Cooling sleeve; 10. Liquid inlet; 11. Liquid outlet; 12. Spiral cooling groove; 13. Sprayer; 14. Main rotating ring; 15. Long fan blade; 16. Short fan blade; 17. Spray hole; 18. Support rod; 19. Second external gear ring; 20. Support rotating ring. Detailed implementation manners

[0024] In order to further understand the utility model content, features and effects of the present utility model, the following embodiments are cited and described in detail in conjunction with the accompanying drawings as follows.

[0025] The structure of the present utility model will be described in detail below in conjunction with the accompanying drawings.

[0026] Refer to Figures 1 to 4 As shown, a motor cooling device of a refrigeration compressor provided by an embodiment of the present utility model includes a motor housing 1, a motor rotor 3, a motor stator 2 and a transmission shaft 4. The transmission shaft 4 is fixedly connected to the middle of the motor rotor 3. A cooling sleeve 9 is sleeved between the motor housing 1 and the motor stator 2. One end of the motor housing 1 is fixedly connected with a cover body 5 through bolts. A sprayer 13 is fixedly installed in the middle of the cover body 5. The output end of the sprayer 13 is fixedly installed with a main spray pipe 6. The main spray pipe 6 extends into the interior of the cover body 5. A long fan blade 15 is rotatably connected to the main spray pipe 6. A spray branch pipe 7 is fixedly connected to the side wall of the main spray pipe 6. A short fan blade 16 is rotatably connected to the spray branch pipe 7. One end of the transmission shaft 4 extends into the interior of the cover body 5. The transmission shaft 4 is fixedly connected with the long fan blade 15 through a support rod 18. A first external gear ring 8 is fixedly connected between the other ends of the long fan blades 15. The first external gear ring 8 can drive the short fan blade 16 to rotate.

[0027] The cooling sleeve 9 is provided with a liquid inlet 10 and a liquid outlet 11. A spiral cooling groove 12 is integrally formed on the outer wall of the cooling sleeve 9. The spiral cooling groove 12 is communicated with the liquid inlet 10 and the liquid outlet 11.

[0028] Adopting the above scheme: When cooling work is carried out, the liquid refrigerant is placed into the spiral cooling groove 12 through the liquid inlet 10 and spirally winds around the inside of the motor, thereby facilitating a full - range cooling effect inside the motor. Finally, the liquid refrigerant is discharged through the liquid outlet 11.

[0029] A main spray pipe 6 is sleeved with a main rotating ring 14 through a bearing. A long fan blade 15 is fixedly connected to the main rotating ring 14. Both ends of a support rod 18 are fixedly connected to the main rotating ring 14 and a transmission shaft 4 respectively. A branch spray pipe 7 is sleeved with a branch rotating ring 20 through a bearing. A short fan blade 16 is fixedly connected to the branch rotating ring 20. An outer second gear ring 19 is fixedly sleeved on the outer wall of the branch rotating ring 20, and the outer second gear ring 19 is meshed with an outer first gear ring 8.

[0030] Adopting the above solution: Through the mutual meshing of the outer first gear ring 8 and the outer second gear ring 19, when the transmission shaft 4 rotates, it is convenient to drive the outer second gear ring 19 to rotate through the outer first gear ring 8, and then drive the main rotating ring 14 and the branch rotating ring 20 to rotate, so as to drive the long fan blade 15 and the short fan blade 16 to rotate synchronously, thus facilitating the rapid circulation of the sprayed fog-like refrigerant inside the motor, making the spraying effect faster and more uniform, further enhancing the cooling rate, and effectively improving the cooling efficiency.

[0031] The spray opening end of the main spray pipe 6 corresponds to the middle position of the motor housing 1, the spray opening end of the branch spray pipe 7 corresponds to the edge position of the motor housing 1, and the short fan blade 16 corresponds to the position of the cooling sleeve 9.

[0032] Adopting the above solution: The long fan blade 15 is located at the middle position inside the motor, and the short fan blade 16 is located at the edge position inside the motor, which is convenient for enhancing the cooling effect in all aspects inside the motor, making the spray cooling uniform and beneficial to improving the cooling efficiency.

[0033] Three short fan blades 16 are set as a group, and the short fan blades 16 in each group are evenly distributed in a circular array.

[0034] Adopting the above solution: When the short fan blades 16 in each group rotate, it is convenient to accelerate the circulation speed of the fog-like refrigerant inside the motor, making the spray cooling effect more uniform and effective.

[0035] Spray holes 17 are formed on both the main spray pipe 6 and the branch spray pipe 7. The spray opening end and the spray holes 17 of the main spray pipe 6 are respectively located on both sides of the long fan blade 15, and the spray opening end and the spray holes 17 of the branch spray pipe 7 are respectively located on both sides of the short fan blade 16.

[0036] Adopting the above solution: By simultaneously spraying the fog-like refrigerant through the opening ends and the spray holes 17 on the main spray pipe 6 and the branch spray pipe 6 of the main spray pipe, it is convenient for the fog-like refrigerant to be dispersed in every corner inside the motor, which is beneficial to further enhancing the spray cooling effect.

[0037] The working principle of the present utility model:

[0038] During use, when cooling the motor, the liquid refrigerant is placed into the spiral cooling groove 12 through the liquid inlet 10 and coils around the inside of the motor in a spiral shape, thus facilitating a full-range cooling effect inside the motor. Finally, the liquid refrigerant is discharged through the liquid outlet 11. At the same time, the transmission shaft 4 drives the support rod 18 to rotate, and through the principle of gear transmission, the first outer gear ring 8 drives the second outer gear ring 19 to rotate, which in turn drives the main rotating ring 14 and the supporting rotating ring 20 to rotate. Finally, the synchronous rotational movement of the long fan blade 15 and the short fan blade 16 is achieved, thus facilitating the rapid circulation of the fog-like refrigerant sprayed through the spray main pipe 6, the spray branch pipe 7, and the spray holes 17 inside the motor, making the spray cooling effect faster and more uniform, further enhancing the cooling rate, and thus effectively improving the cooling efficiency.

[0039] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device.

[0040] Although the embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An electric motor cooling device for a refrigeration compressor, comprising a motor housing (1), a motor rotor (3), a motor stator (2) and a transmission shaft (4), the transmission shaft (4) being fixedly connected to the middle of the motor rotor (3), characterized in that: A cooling sleeve (9) is sleeved between the motor housing (1) and the motor stator (2). One end of the motor housing (1) is fixedly connected with a cover body (5) through bolts. A sprayer (13) is fixedly installed in the middle of the cover body (5). The output end of the sprayer (13) is fixedly installed with a main spray pipe (6). The main spray pipe (6) extends into the interior of the cover body (5). A long fan blade (15) is rotatably connected to the main spray pipe (6). A spray branch pipe (7) is fixedly connected to the side wall of the main spray pipe (6). A short fan blade (16) is rotatably connected to the spray branch pipe (7). One end of the transmission shaft (4) extends into the interior of the cover body (5). The transmission shaft (4) is fixedly connected with the long fan blade (15) through a support rod (18). A first external gear ring (8) is fixedly connected between the other ends of the long fan blades (15). The first external gear ring (8) can drive the short fan blade (16) to rotate.

2. The motor cooling device of a refrigeration compressor according to claim 1, characterized in that: The cooling sleeve (9) is provided with a liquid inlet (10) and a liquid outlet (11). A spiral cooling groove (12) is integrally formed on the outer wall of the cooling sleeve (9). The spiral cooling groove (12) is communicated with the liquid inlet (10) and the liquid outlet (11).

3. The motor cooling device of a refrigeration compressor according to claim 2, characterized in that: A main rotating ring (14) is sleeved on the main spray pipe (6) through a bearing. The long fan blade (15) is fixedly connected to the main rotating ring (14). Both ends of the support rod (18) are fixedly connected with the main rotating ring (14) and the transmission shaft (4) respectively. A support rotating ring (20) is sleeved on the spray branch pipe (7) through a bearing. The short fan blade (16) is fixedly connected to the support rotating ring (20). A second external gear ring (19) is fixedly sleeved on the outer wall of the support rotating ring (20). The second external gear ring (19) is meshed with the first external gear ring (8).

4. The motor cooling device of a refrigeration compressor according to claim 3, characterized in that: The spray opening end of the main spray pipe (6) corresponds to the middle position of the motor housing (1). The spray opening end of the spray branch pipe (7) corresponds to the edge position of the motor housing (1). The short fan blade (16) corresponds to the position of the cooling sleeve (9).

5. The motor cooling device of a refrigeration compressor according to claim 4, characterized in that: Three short fan blades (16) are provided as a group, and each group of short fan blades (16) is evenly distributed in a circular array.

6. The motor cooling device of a refrigeration compressor according to claim 5, characterized in that: Spray holes (17) are formed on both the main spray pipe (6) and the spray branch pipe (7). The spray opening end and the spray holes (17) of the main spray pipe (6) are respectively located on both sides of the long fan blade (15). The spray opening end and the spray holes (17) of the spray branch pipe (7) are respectively located on both sides of the short fan blade (16).

Images