Bearing cooling structure of oil-free scroll air compressor
By designing the moving scroll and cooling air shunt assembly in the oil-free scroll air compressor, the problem of excessive central bearing temperature is solved, achieving more efficient cooling and longer service life.
Patent Information
- Application Number
- CN202420900413.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-28
- Publication Date
- 2024-12-13
- Estimated Expiration
- 2034-04-28
AI Technical Summary
The central bearing temperature of the existing oil-free scroll air compressor is too high and the cooling is insufficient, which leads to carbonization of grease and cages, and the body is stuck. The solution to increase the cooling air volume by using a larger air impeller has a large space and cooling air. The problem of low utilization rate and large power loss.
A bearing cooling structure including a moving scroll, a driving disk and a cooling air shunt assembly is designed. The moving scroll is equipped with a heat dissipation fin and a connecting boss. The cooling air shunt assembly forms a communication chamber through a shunt partition and an air guide cover. , the diversion partition and the air guide hood are cast as one, and the cooling air is reasonably diverted to the central bearing, reducing the contact area between the drive disk and the moving scroll disk, and enhancing the heat dissipation effect.
Effectively reduce the temperature of the center bearing, extend the service life, improve the utilization rate of cooling air, and reduce power loss.
Smart Images
Figure CN222162928U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of air compressors, in particular to a bearing cooling structure of an oil-free scroll air compressor. Background Art
[0002] Existing oil-free scroll air compressors generally encounter the problem of over-high center bearing temperature and insufficient cooling, which causes carbonization of grease and cage, resulting in machine body jamming. In order to reduce the temperature of the machine body and extend the service life, the general measure is to increase the cooling air volume by selecting a larger fan wheel. This technical solution has the disadvantages of large machine space occupation, low cooling air utilization rate and large power loss. Utility Model Content
[0003] The utility model aims to provide a bearing cooling structure for an oil-free scroll air compressor in view of the defects in the prior art that an oil-free scroll air compressor uses a larger-sized impeller to increase the cooling air volume to reduce the body temperature, resulting in a large space occupied by the whole machine, low cooling air utilization rate and large power loss.
[0004] The utility model solves the above technical problems through the following technical solutions:
[0005] The utility model provides a bearing cooling structure of an oil-free scroll air compressor, which is characterized in that the bearing cooling structure comprises a movable scroll, a driving disk, and a cooling wind diversion component, the movable scroll and the driving disk are arranged opposite to each other and cooperate with each other, the movable scroll comprises a heat dissipation fin and a connecting boss, the heat dissipation fin and the connecting boss are arranged on the movable scroll at intervals, the height of the connecting boss is greater than the height of the heat dissipation fin, the connecting boss abuts against the driving disk so that a gap is formed between the heat dissipation fin and the driving disk, the cooling wind diversion component is arranged on one side of the movable scroll and the driving disk, the cooling wind diversion component comprises a diversion baffle and an air guide cover, the diversion baffle is arranged in the air guide cover so that two mutually connected first chambers and a second chamber are formed in the air guide cover, and the first chamber and the second chamber are both facing the movable scroll and the driving disk.
[0006] Preferably, the connection between the diversion baffle and the air guide cover is an arc transition.
[0007] Preferably, the flow splitter baffle and the air guide cover are cast as one piece.
[0008] Preferably, the diversion baffle and the air guide cover are both made of polypropylene.
[0009] Preferably, the movable scroll and the driving plate are fixedly connected by bolts.
[0010] Preferably, the first chamber faces the heat dissipation fins and the connecting boss.
[0011] Preferably, the driving disk and the movable scroll are in contact only at the connecting boss, and the heat dissipation fins are not in contact with the driving disk.
[0012] On the basis of conforming to the common sense in the art, the above-mentioned preferred conditions can be arbitrarily combined to obtain the preferred embodiments of the present utility model.
[0013] The positive progressive effect of the utility model is that: the bearing cooling structure of the oil-free scroll air compressor of the utility model adds a diversion baffle in the cooling air diversion component, and the cooling air diversion component reasonably diverts the cooling air to the center bearing, so that the heat dissipation of the center bearing is more sufficient; at the same time, a connecting boss is provided on the movable scroll to reduce the contact area between the drive plate and the movable scroll, thereby reducing the heat transferred from the movable scroll to the center bearing through the drive plate, thereby effectively reducing the temperature of the center bearing and extending the service life of the center bearing and the entire machine. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] Figure 1 It is a structural schematic diagram of the bearing cooling structure of the utility model.
[0015] Figure 2 It is a structural schematic diagram of the movable scroll of the utility model.
[0016] Figure 3 It is a structural schematic diagram of the cooling air diversion component of the utility model.
[0017] Figure 4 It is a schematic diagram of the installation structure of the movable scroll and the heat dissipation fins of the utility model.
[0018] Description of reference numerals:
[0019] Moving scroll 1
[0020] Heat sink 11
[0021] Connecting boss 12
[0022] Driver disk 2
[0023] Cooling air diversion component 3
[0024] Air guide hood 31
[0025] Diverter baffle 32
[0026] First chamber 33
[0027] Second chamber 34 DETAILED DESCRIPTION
[0028] The present invention will be described more clearly and completely below by way of embodiments in conjunction with the accompanying drawings, but the present invention is not limited to the scope of the embodiments.
[0029] The utility model discloses a bearing cooling structure of an oil-free scroll air compressor, such as Figure 1-4 As shown, the bearing cooling structure includes a movable scroll 1, a driving disk 2, and a cooling wind diverter assembly 3. The movable scroll 1 and the driving disk 2 are arranged opposite to each other and cooperate with each other. The movable scroll 1 includes a heat dissipation fin 11 and a connecting boss 12. The heat dissipation fin 11 and the connecting boss 12 are arranged on the movable scroll 1 at intervals. The height of the connecting boss 12 is greater than the height of the heat dissipation fin 11. The connecting boss 12 abuts against the driving disk 2 so that there is a gap between the heat dissipation fin 11 and the driving disk 2. The cooling wind diverter assembly 3 is arranged on one side of the movable scroll 1 and the driving disk 2. The cooling wind diverter assembly 3 includes a diverter baffle 32 and an air guide cover 31. The diverter baffle 32 is arranged in the air guide cover 31 so that two mutually connected first chambers 33 and second chambers 34 are formed in the air guide cover 31, and the first chamber 33 and the second chamber 34 are both facing the movable scroll 1 and the driving disk 2.
[0030] Specifically, the housing of the oil-free scroll air compressor includes a driving disk 2, a movable scroll 1, and a fixed scroll arranged in sequence. The driving disk 2 moves to drive the movable scroll 1 to move, while the fixed scroll does not move. The movable scroll 1 is arranged opposite to the driving disk 2, and the two are connected by a connecting assembly, and the driving disk 2 is connected to the housing through the connecting assembly. A heat dissipation fin 11 and a connecting boss 12 are arranged on the side of the movable scroll 1 facing the driving disk 2. The heat dissipation fins 11 are arranged on the movable scroll 1 at intervals, and the connecting boss 12 and the heat dissipation fin 11 are also arranged on the movable scroll 1 at intervals. The heat dissipation fin 11 and the connecting boss 12 can be integrated on the movable scroll 1 and directly cast as one. During casting, the height of the connecting boss 12 is greater than the height of the heat dissipation fin 11, and the height difference between the connecting boss 12 and the heat dissipation fin 11 is greater than the machining allowance. During actual machining, only the connecting boss 12 is machined, and the heat dissipation fin 11 is not machined, which saves machining time. Since the height difference between the connecting boss 12 on the blank and the heat sink 11 is greater than the machining allowance of the connecting boss 12, it is ensured that after machining only the connecting boss 12, the height of the connecting boss 12 is still greater than the height of the heat sink 11. In other processing methods, the height of the connecting boss 12 on the blank is consistent with that of the heat sink 11. After machining the connecting boss 12, another process can be added to process the heat sink 11, so as to achieve the purpose of making the heat sink 11 lower than the connecting boss 12.
[0031] The height of the connecting boss 12 from the movable scroll 1 is greater than the height of the heat dissipation fin 11 from the movable scroll 1. Due to the height difference between the connecting boss 12 and the heat dissipation fin 11, the connecting boss 12 can abut against the driving disk 2 during installation, while there is a gap between the heat dissipation fin 11 and the driving disk 2, that is, there is no contact, which reduces the contact area between the movable scroll 1 and the driving disk 2, and reduces the heat transferred from the compression chamber to the center bearing. Under the same conditions, the heat transferred from the movable scroll 1 to the center bearing on the driving disk 2 becomes less.
[0032] The cooling wind diversion assembly 3 is arranged on the outer peripheral side of the movable scroll 1 and the driving disk 2, so that the cooling wind diversion assembly 3 can guide the cooling wind to the connecting boss 12 and the heat dissipation fin 11. The cooling wind diversion assembly 3 includes an air guide cover 31 and a diversion baffle 32. The diversion baffle 32 is connected in the air guide cover 31, so that two mutually connected first chambers 33 and second chambers 34 are formed in the air guide cover 31. The cooling wind flows from the first chamber 33 into the second chamber 34. The first chamber 33 faces the relative area of the movable scroll 1 and the driving disk 2, so that the cooling wind can better flow to the air cooling channel formed between the heat dissipation fin 11 and the connecting boss 12 and between the heat dissipation fin 11 and the connecting boss 12, so that the center bearing can be fully cooled and the heat dissipation effect is enhanced. The air inlet of the air cooling channel faces the first chamber 33 and the second chamber 34.
[0033] In this embodiment, the connection between the flow dividing baffle 32 and the air guide cover 31 is an arc transition.
[0034] Specifically, the connection between the diversion baffle 32 and the air guide cover 31 is a large arc transition, which makes the cooling air flow more smoothly during diversion, reduces the flow loss of the cooling air, and allows the center bearing to be fully cooled.
[0035] In this embodiment, the diverter baffle 32 and the air guide cover 31 are cast as one piece. This arrangement makes the cooling air diverter assembly 3 structurally stable, and the cooling air is more stably directed to the heat dissipation fins 11 and the connecting boss 12, greatly enhancing the heat dissipation effect.
[0036] In other embodiments, the diverter baffle 32 is fixed to the air guide cover 31 with bolts. This arrangement is easy to replace, and diverter baffles 32 of different specifications can also be arranged accordingly to meet different air supply requirements.
[0037] In the present embodiment, the materials of the diverter baffle 32 and the air guide cover 31 are both polypropylene, which has high impact resistance and strong mechanical properties, can enhance the service life of the cooling air diverter assembly 3, and is lightweight.
[0038] In this embodiment, the movable scroll 1 and the driving disk 2 are fixedly connected by bolts, which makes it easy to replace the bolts when they are damaged, and has simple connection, high reliability and low cost.
[0039] In this embodiment, the first chamber 33 is directed toward the heat dissipating fins 11 and the connecting boss 12, that is, toward the air cooling channel formed between the heat dissipating fins 11 and between the heat dissipating fins 11 and the connecting boss 12. This arrangement allows the cooling air in the first chamber 33 to flow better to the heat dissipating fins 11, the connecting boss 12 and the air cooling channel, so that the center bearing can be fully cooled, thereby enhancing the heat dissipation effect.
[0040] The second chamber 34 faces the side of the movable scroll 1 facing away from the driving plate 2. This arrangement allows the cooling air in the second chamber 34 to flow toward the side of the movable scroll 1 facing away from the driving plate 2, and combined with the cooling air in the first chamber 33, both sides of the movable scroll 1 are cooled better, reducing the heat transferred from the movable scroll 1 to the center bearing on the driving plate 2.
[0041] In this embodiment, the driving plate 2 and the movable scroll 1 are in contact only at the connecting boss 12, and the heat dissipation fins 11 are not in contact with the driving plate 2. Such a configuration reduces the contact area between the driving plate 2 and the movable scroll 1, ensures the gap between the heat dissipation fins 11 and the driving plate 2, and has a good heat dissipation effect.
[0042] By adopting this implementation mode, after actual testing, the temperature of the center bearing is effectively reduced by more than 10° C., ensuring that the center bearing can be used normally and extending the service life of the whole machine.
[0043] Although the specific implementations of the utility model are described above, those skilled in the art should understand that this is only an example, and the protection scope of the utility model is defined by the attached claims. Those skilled in the art can make various changes or modifications to these implementations without departing from the principle and essence of the utility model, but these changes and modifications fall within the protection scope of the utility model.
Claims
1. A bearing cooling structure for an oil-free scroll air compressor, characterized in that: The bearing cooling structure includes a movable scroll, a driving disk, and a cooling air diverter assembly. The movable scroll and the driving disk are arranged opposite to each other and cooperate with each other. The movable scroll includes heat dissipation fins and connecting bosses. The heat dissipation fins and the connecting bosses are arranged on the movable scroll at intervals. The height of the connecting boss is greater than the height of the heat dissipation fins. The connecting boss abuts against the driving disk so that a gap exists between the driving disk and the cooling air diverter assembly. The cooling air diverter assembly is arranged on one side of the movable scroll and the driving disk. The cooling air diverter assembly includes a diverter baffle and an air guide cover. The diverter baffle is arranged in the air guide cover so that two mutually connected first chambers and a second chamber are formed in the air guide cover, and the first chamber and the second chamber are both facing the movable scroll and the driving disk.
2. The bearing cooling structure of the oil-free scroll air compressor according to claim 1, characterized in that: The connection between the flow dividing baffle and the air guiding cover is an arc transition.
3. The bearing cooling structure of the oil-free scroll air compressor according to claim 1, characterized in that: The flow dividing baffle and the air guide cover are cast as one body.
4. The bearing cooling structure of the oil-free scroll air compressor according to claim 1, characterized in that: The diversion baffle and the air guide cover are both made of polypropylene.
5. The bearing cooling structure of the oil-free scroll air compressor according to claim 1, characterized in that: The movable scroll and the driving plate are fixedly connected by bolts.
6. The bearing cooling structure of the oil-free scroll air compressor according to claim 1, characterized in that: The first chamber faces the heat dissipation fins and the connecting boss.
7. The bearing cooling structure of the oil-free scroll air compressor according to claim 1, characterized in that: The driving disk and the movable scroll are in contact only at the connecting boss, and the heat dissipation fins are not in contact with the driving disk.