Air blower cooling structure

Abstract

The utility model discloses an air blower cooling structure which comprises a machine base, a rotating shaft and a fan end volute, the machine base is provided with an installation portion connected with a stator iron core with a winding in a matched mode so that the stator iron core with the winding can be installed in a first containing cavity in the machine base, and the machine base is provided with an air inlet communicated with the first containing cavity. The mounting part is provided with a first through hole for air circulation; the rotating shaft is installed on the machine base through a fan end cover and a bearing and penetrates through the stator iron core with the winding, the stator iron core and the rotating shaft are arranged in a spaced mode, one end of the rotating shaft is provided with a cooling fan rotating along with the rotating shaft, and the fan end cover is provided with a second through hole for air circulation. The fan end volute is arranged at one end of the machine base and provided with an air outlet channel communicated with the first containing cavity, and when the cooling fan works, the first through hole for air circulation is formed in the installation part, so that all-directional cooling of the stator iron core with the winding and the rotating shaft can be achieved; and damage to heat balance of the system due to the fact that local positions in the motor are not well cooled is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of blowers, in particular to a cooling structure of a blower. Background Art

[0002] Air suspension blower, air suspension centrifugal blower (single-stage high-speed centrifugal blower) is a new concept blower, which adopts three core high-end technologies: "ultra-high-speed direct-connected motor", "air suspension bearing" and "high-precision single-stage centrifugal impeller", creating a new era of high-efficiency, high-performance, low-noise and low-energy consumption blowers. It is a new generation of high-tech civilian products developed with the experience of aviation turbomachinery design. It is widely used in sewage treatment, papermaking and printing, chemical industry, pneumatic conveying and other industries.

[0003] The existing blower cooling duct structure is only for cooling the motor winding core and the rotating shaft. The designed cooling flow channel has the problem that one end of the stator core with winding is not well cooled, causing the end winding temperature to rise; there are few solutions for cooling the thrust bearing involved in the blower, and the durability and performance of the thrust bearing are reduced.

[0004] Therefore, how to provide a blower cooling structure to at least partially solve the above-mentioned drawbacks is a technical problem that technical personnel in this field currently need to solve. Utility Model Content

[0005] The utility model aims to provide a blower cooling structure, which can realize all-round cooling of the stator core with winding and the rotating shaft, has high cooling efficiency, and can avoid the destruction of the system thermal balance due to poor cooling of local positions in the motor.

[0006] In order to achieve the above object, the utility model provides a blower cooling structure, comprising:

[0007] The base is provided with a mounting portion that cooperates with the stator core with windings, so that the stator core with windings is installed in a first accommodating cavity inside the base, the base is provided with an air inlet hole connected to the first accommodating cavity, and the mounting portion is provided with a first through hole for gas circulation;

[0008] The rotating shaft is installed on the machine base through the fan end cover and the bearing, and the rotating shaft is passed through the stator core with windings arranged at a distance therefrom, one end of the rotating shaft is provided with a cooling fan rotating therewith, and the cooling fan is located on the side of the fan end cover away from the stator core with windings, and the fan end cover is provided with a second through hole for gas circulation;

[0009] The fan end volute is arranged at one end of the machine base and is provided with an air outlet passage connected to the first accommodating chamber, so that the gas driven to the first accommodating chamber by the rotation of the cooling fan can be discharged along the air outlet passage.

[0010] Preferably, the air outlet channel comprises:

[0011] A third through hole is provided corresponding to the second through hole, and is used for the gas in the first accommodating chamber to flow through the second through hole and then along the third through hole to the inlet end of the cooling fan;

[0012] The fourth channel is arranged at intervals from the third through hole and is used for the gas passing through the outlet end of the cooling fan to be discharged along the volute at the fan end.

[0013] Preferably, a mounting seat is provided between the cooling fan and the fan end cover, and mounting grooves for installing thrust bearings are provided on the sides facing each other of the mounting seat and the fan end cover, and the mounting seat and the end cover are combined to form a second accommodating cavity, and the second accommodating cavity is used to install a thrust plate, and the thrust plate is arranged between the two thrust bearings.

[0014] Preferably, a fan wheel cover is provided on the outside of the cooling fan, and a diffuser structure for increasing the gas pressure is formed between the fan wheel cover and the mounting seat, so that the gas compressed by the cooling fan is discharged through the diffuser structure.

[0015] Preferably, the mounting seat is also provided with a fifth through hole, and the distance between the fifth through hole and the axis of the rotating shaft is greater than the distance between the outlet end of the cooling fan and the axis of the rotating shaft, so that part of the compressed gas passing through the outlet end of the cooling fan enters the second accommodating chamber along the fifth through hole for cooling the thrust bearing.

[0016] Preferably, the fan end cover is provided with a sixth through hole, and the sixth through hole is connected to the first accommodating chamber and the second accommodating chamber to allow the gas passing through the second accommodating chamber to flow to the first accommodating chamber.

[0017] Preferably, the third through hole is a waist-shaped hole and is arranged along the circumference of the fan end volute.

[0018] Preferably, the cross section of the sixth through hole perpendicular to its own axis is circular, and the axis of the sixth through hole is arranged at an angle with the axis of the rotating shaft.

[0019] Preferably, the air inlet holes are evenly arranged along the circumference of the base, the axes of the air inlet holes are perpendicular to the axis of the rotating shaft, and the cross-sections of the air inlet holes perpendicular to their own axes are all circular.

[0020] Preferably, a filter assembly is provided on the machine base, and the filter assembly is detachably arranged in the air inlet, and the filter assembly includes a filter screen for preventing impurities from entering the first accommodating cavity along the air inlet.

[0021] Compared with the above-mentioned background technology, the blower cooling structure provided by the utility model includes a base, a rotating shaft and a fan end volute, the base is provided with a mounting portion which cooperates with a stator core with a winding, so that the stator core with a winding can be installed in a first accommodating chamber inside the base, the base is provided with an air inlet hole connected to the first accommodating chamber, and the mounting portion is provided with a first through hole for gas circulation; the rotating shaft is installed on the base through a fan end cover and a bearing, and the rotating shaft is passed through the stator core with a winding which is spaced apart from it, one end of the rotating shaft is provided with a cooling fan which rotates therewith, and the cooling fan is located on a side of the fan end cover away from the stator core with a winding, and the fan end cover is provided with a second through hole for gas circulation; the fan end volute is arranged at one end of the base and is provided with an exhaust passage connected to the first accommodating chamber, so that the gas driven to the first accommodating chamber by the rotation of the cooling fan can be discharged along the exhaust passage.

[0022] When the shaft is running at high speed, the cooling fan will draw the surrounding air into the blade flow channel, and a negative pressure will be formed at the inlet end of the cooling fan, forming a pressure difference with the ambient pressure outside the base. The ambient air outside the base will be sucked into the first accommodating chamber to cool and dissipate the heat of the motor part of the blower;

[0023] The gas enters the motor through the air inlet, and then passes through the outer diameter of the stator core with winding to cool the stator core with winding. Then the cooling airflow passes through the winding at the left end of the stator core with winding, and then passes through the narrow axial space between the stator core with winding and the rotating shaft to cool the stator core with winding and the rotating shaft. Finally, the airflow enters the cooling fan suction chamber through the second through hole on the fan end cover and the air outlet channel of the fan end volute, and then the gas is sucked into the cooling fan;

[0024] In addition, external environmental gas enters the motor through the air inlet hole, and a first through hole for gas circulation is provided through the mounting portion that cooperates with the stator core with winding and the base, so that the gas flows into the winding at the right end of the stator core with winding. After cooling the end winding, the gas is mixed with the gas flowing through the narrow axial space between the stator core with winding and the rotating shaft, and is sucked into the cooling fan together, and finally discharged to the outside through the fan end volute. With this arrangement, when the cooling fan is working, the first through hole for gas circulation is provided through the mounting portion, so that all-round cooling of the stator core with winding and the rotating shaft can be achieved. While the cooling efficiency is high, it can avoid the destruction of the system thermal balance due to poor cooling of local positions in the motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings in the following description are only embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0026] Figure 1 A schematic diagram of a first cooling path in a blower cooling structure provided by an embodiment of the utility model;

[0027] Figure 2 A schematic diagram of the structure of a second cooling path in a blower cooling structure provided by an embodiment of the utility model;

[0028] Figure 3 A schematic diagram of the structure of a third cooling path in the blower cooling structure provided by an embodiment of the utility model;

[0029] Figure 4 A schematic diagram of the structure of the base provided by the embodiment of the utility model;

[0030] Figure 5 A schematic diagram of the structure of the fan end volute provided in an embodiment of the utility model;

[0031] Figure 6 A schematic diagram of the structure of the mounting base provided by an embodiment of the utility model;

[0032] Figure 7 A schematic diagram of the structure of the fan end cover provided by an embodiment of the utility model;

[0033] Figure 8 A structural cross-sectional view of a fan end cover provided in an embodiment of the utility model.

[0034] in:

[0035] 1-base, 11-mounting portion, 12-first accommodating cavity, 13-air inlet, 14-first through hole;

[0036] 2- stator core with winding;

[0037] 3-rotating shaft, 31-bearing;

[0038] 4-fan end cover, 41-second through hole, 42-sixth through hole;

[0039] 5-Cooling fan;

[0040] 6-fan end volute, 61-third through hole;

[0041] 7-mounting seat, 71-mounting groove, 72-second accommodating cavity, 73-fifth through hole;

[0042] 8-Thrust bearing;

[0043] 9-Thrust plate;

[0044] 10-Fan wheel cover. DETAILED DESCRIPTION

[0045] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0046] In order to enable those skilled in the art to better understand the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0047] In the description of the present invention, it should be understood that the terms "inside", "outside", "left", "right", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the position or element referred to must have a specific direction, be constructed and operate in a specific direction, and therefore should not be understood as a limitation of the present invention.

[0048] The utility model aims to provide a blower cooling structure, which can realize all-round cooling of the stator core with winding and the rotating shaft, has high cooling efficiency, and can avoid the destruction of the system thermal balance due to poor cooling of local positions in the motor.

[0049] See also Figure 1 , Figure 2 and Figure 4 To achieve the above-mentioned purpose, the utility model provides a blower cooling structure, including a base 1, a rotating shaft 3 and a fan end volute 6.

[0050] The machine base 1 is provided with a mounting portion 11 which is matched and connected with the stator core 2 with windings, and a first accommodating cavity 12 for accommodating the stator core 2 with windings is provided inside the machine base 1. The mounting portion 11 is used to mount the stator core 2 with windings on the machine base 1, so that the stator core 2 with windings is installed in the first accommodating cavity 12 inside the machine base 1. The machine base 1 is provided with an air inlet 13 which is connected to the first accommodating cavity 12, so that external gas enters the first accommodating cavity 12 to cool the motor part of the blower. The mounting portion 11 is located between the left end winding and the right end winding of the stator core 2 with windings. The mounting portion 11 is provided with a first through hole 14 for gas circulation, so that the gas located in the first accommodating cavity 12 can flow along the first through hole 14 to both sides of the mounting portion 11, wherein the air inlet is preferably located between the left end winding of the stator core 2 with windings and the mounting portion 11.

[0051] See also Figure 7 The rotating shaft 3 is installed on the machine base 1 through the fan end cover 4 and the bearing 31, wherein one end of the rotating shaft 3 is directly installed on the machine base 1 through the bearing 31, and the other end of the rotating shaft 3 is installed on the machine base 1 through the fan end cover 4 abutting against the bearing 31. The rotating shaft 3 is penetrated by the stator core 2 with windings, and the rotating shaft 3 and the stator core 2 with windings are spaced apart. A cooling fan 5 rotating with the rotating shaft 3 is provided at one end of the rotating shaft 3. The cooling fan 5 is driven to rotate by the rotating shaft 3, so that the interior of the motor part is in a negative pressure environment, for gas to enter the first accommodating chamber 12 along the air inlet hole 13. The cooling fan 5 is located on the side of the fan end cover 4 away from the stator core 2 with windings, and the fan end cover 4 is provided with a second through hole 41 for gas circulation.

[0052] See also Figure 5 The fan-end volute 6 is arranged at one end of the base 1 and is provided with an outlet channel connected to the first accommodating chamber 12. The outlet channel includes a third through hole 61 and a fourth channel. The third through hole 61 is arranged corresponding to the second through hole 41, and is used for the gas in the first accommodating chamber 12 to flow along the third through hole 61 to the inlet end of the cooling fan 5 after passing through the second through hole 41; the fourth channel is arranged at intervals from the third through hole 61, and is used for the gas passing through the outlet end of the cooling fan 5 to be discharged along the fan-end volute 6. The outlet channel including the third through hole 61 and the fourth channel can enable the gas driven to the first accommodating chamber 12 by the rotation of the cooling fan 5 to be discharged along the outlet channel.

[0053] Among them, the third through hole 61 is a waist-shaped hole and is arranged along the circumference of the fan end volute 6. The third through hole 61 preferably adopts two non-completely identical hole types (for example: two waist-shaped holes of different lengths) at the same time, so as to make the positions of the third through hole 61 and the second through hole 41 correspond to each other, prevent the situation of reverse installation or misalignment, so as not to affect the gas circulation effect.

[0054] When the rotating shaft 3 is running at high speed, the cooling fan 5 will draw the surrounding gas into the blade flow channel, and a negative pressure will be formed at the inlet end of the cooling fan 5, forming a pressure difference with the external environmental pressure of the base 1. The external environmental gas of the base 1 will be sucked into the first accommodating chamber 12 to cool and dissipate the heat of the motor part of the blower.

[0055] The first cooling path is: the gas enters the motor through the air inlet 13, and then passes through the outer diameter of the stator core 2 with winding to cool the stator core 2 with winding, and then the cooling air flow passes through the winding at the left end of the stator core 2 with winding, and then passes through the narrow axial space between the stator core 2 with winding and the rotating shaft 3 to cool the stator core 2 with winding and the rotating shaft 3, and finally the air flow enters the cooling fan suction chamber through the second through hole 41 on the fan end cover 4 and the third through hole 61 of the fan end volute 6, and then the gas is sucked into the cooling fan 5, and then the gas discharged by the cooling fan 5 is discharged to the outside of the motor along the fourth channel.

[0056] The second cooling path is: the external environment gas enters the motor through the air inlet 13, and a first through hole 14 for gas circulation is provided through the mounting portion 11 which is connected by the stator core 2 with winding and the base 1, so that the gas flows into the winding at the right end of the stator core 2 with winding. After cooling the winding at the right end, the gas is mixed with the gas flowing through the narrow axial space between the stator core 2 with winding and the rotating shaft 3, and the air flow enters the cooling fan suction chamber through the second through hole 41 on the fan end cover 4 and the third through hole 61 of the fan end volute 6, and is sucked into the cooling fan 5 together, and then the gas discharged by the cooling fan 5 is discharged to the outside of the motor along the fourth channel.

[0057] With such arrangement, when the cooling fan 5 is working, the first through hole 14 for gas circulation is provided through the mounting portion 11, so that all-round cooling of the stator core 2 with windings and the rotating shaft 3 can be achieved. While the cooling efficiency is high, it can avoid the destruction of the thermal balance of the system due to poor cooling of local positions in the motor.

[0058] See also Figure 6 In the present embodiment, a mounting seat 7 is provided between the cooling fan 5 and the fan end cover 4, and mounting grooves 71 for installing the thrust bearing 8 are provided on the sides facing each other of the mounting seat 7 and the fan end cover 4, and the mounting seat 7 and the end cover are surrounded to form a second accommodating cavity 72, and the second accommodating cavity 72 is used to install the thrust disk 9, and the thrust disk 9 is arranged between the two thrust bearings 8, and a fan wheel cover 10 is provided on the outside of the cooling fan 5, and a diffuser structure for increasing the gas pressure is formed between the fan wheel cover 10 and the mounting seat 7, so that the gas compressed by the cooling fan 5 is discharged through the diffuser structure.

[0059] Among them, the mounting seat 7 is also provided with a fifth through hole 73, the axis of the fifth through hole 73 is preferably parallel to the axis of the rotating shaft 3, and the distance between the fifth through hole 73 and the axis of the rotating shaft 3 is greater than the distance between the outlet end of the cooling fan 5 and the axis of the rotating shaft 3, so that part of the compressed gas passing through the outlet end of the cooling fan 5 enters the second accommodating chamber 72 along the fifth through hole 73 for cooling the thrust bearing 8.

[0060] See also Figure 8 The fan end cover 4 is provided with a sixth through hole 42, which is connected to the first accommodating chamber 12 and the second accommodating chamber 72, so that the gas passing through the second accommodating chamber 72 can flow to the first accommodating chamber 12, wherein the cross-section of the sixth through hole 42 perpendicular to its own axis is circular, and the axis of the sixth through hole 42 is set at an angle to the axis of the rotating shaft 3, and the end of the sixth through hole 42 closer to the axis of the rotating shaft 3 is in contact with the second accommodating chamber 72, so as to increase the flow path of the gas in the second accommodating chamber 72 and increase the heat dissipation effect of the thrust bearing 8.

[0061] See also Figure 3 , the third cooling path: the inhaled gas is compressed under the action of the cooling fan 5 and obtains a certain outlet pressure. At the same time, in the expansion structure composed of the thrust bearing 8 mounting seat 7 and the fan wheel cover 10, the gas flow rate is slowed down and the static pressure of the gas is increased; part of the high-pressure gas discharged by the cooling fan 5 enters the second accommodating chamber 72 through the fifth through hole 73, and then the gas in the second accommodating chamber 72 forms a pressure difference with the sixth through hole 42 of the fan end cover 4, so that the gas cools the thrust bearing 8, and finally is discharged from the sixth through hole 42 to the first accommodating chamber 12, and then mixed with the gas in other paths, and then is inhaled into the cooling fan 5.

[0062] Preferably, a filter assembly is provided on the base 1, and the filter assembly is detachably arranged in the air inlet 13. The filter assembly includes a filter screen for preventing impurities from entering the first accommodating chamber 12 along the air inlet 13, further avoiding the influence of impurities on the operation of components such as the rotating shaft 3.

[0063] The air inlet holes 13 are evenly arranged along the circumference of the base 1, the axes of the air inlet holes 13 are perpendicular to the axes of the rotating shaft 3, and the cross-sections of the air inlet holes 13 perpendicular to their own axes are all circular. The multiple air inlet holes 13 formed along the outer diameter of the base 1 can cool multiple parts such as the stator core 2 with windings and the rotating shaft 3; in particular, a first through hole 14 for gas circulation is provided on the mounting portion 11 where the stator core 2 with windings is connected to the base 1, so that the winding at the right end of the stator core 2 with windings can be cooled to avoid the influence of excessive stator temperature rise due to poor cooling of the winding at the right end of the stator core 2 with windings. In addition, part of the gas introduced from the outlet end of the cooling fan 5 is used for cooling the thrust bearing 8, which can significantly improve the operating temperature conditions of the thrust bearing 8 and enhance the performance and durability of the thrust bearing 8.

[0064] It should be noted that, in this specification, relational terms such as first and second are merely used to distinguish one entity from other entities, but do not necessarily require or imply any actual relationship or order between these entities.

[0065] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0066] This article uses specific examples to illustrate the principles and implementation methods of the utility model. The above examples are only used to help understand the method and core ideas of the utility model. It should be pointed out that for ordinary technicians in this technical field, without departing from the principles of the utility model, the utility model can also be improved and modified, and these improvements and modifications also fall within the scope of protection of the utility model.

Claims

1. A blower cooling structure, characterized in that: include: A machine base, provided with a mounting portion connected to a stator core with windings, so that the stator core with windings is mounted in a first accommodating cavity inside the machine base, the machine base is provided with an air inlet hole connected to the first accommodating cavity, and the mounting portion is provided with a first through hole for gas circulation; A rotating shaft is installed on the base through a fan end cover and a bearing, and the rotating shaft is passed through the stator core with windings arranged at a distance therefrom, a cooling fan rotating therewith is provided at one end of the rotating shaft, and the cooling fan is located on a side of the fan end cover away from the stator core with windings, and the fan end cover is provided with a second through hole for gas circulation; The fan end volute is arranged at one end of the base and is provided with an air outlet passage connected to the first accommodating chamber, so that the gas driven to the first accommodating chamber by the rotation of the cooling fan can be discharged along the air outlet passage.

2. The blower cooling structure according to claim 1, characterized in that: The air outlet channel comprises: a third through hole, arranged corresponding to the second through hole, for allowing the gas in the first accommodating chamber to flow through the second through hole and then along the third through hole to the inlet end of the cooling fan; The fourth channel is arranged at intervals from the third through hole and is used for the gas passing through the outlet end of the cooling fan to be discharged along the fan end volute.

3. The blower cooling structure according to claim 1, characterized in that: A mounting seat is provided between the cooling fan and the fan end cover, and mounting grooves for installing thrust bearings are provided on the sides facing each other of the mounting seat and the fan end cover, and the mounting seat and the end cover are combined to form a second accommodating cavity, and the second accommodating cavity is used to install a thrust plate, and the thrust plate is arranged between two thrust bearings.

4. The blower cooling structure according to claim 3, characterized in that: A fan wheel cover is disposed on the outside of the cooling fan, and a pressure diffuser structure for increasing gas pressure is formed between the fan wheel cover and the mounting seat, so that the gas compressed by the cooling fan is discharged through the pressure diffuser structure.

5. The blower cooling structure according to claim 4, characterized in that: The mounting seat is also provided with a fifth through hole, and the distance between the fifth through hole and the axis of the rotating shaft is greater than the distance between the outlet end of the cooling fan and the axis of the rotating shaft, so that part of the compressed gas passing through the outlet end of the cooling fan enters the second accommodating chamber along the fifth through hole for cooling the thrust bearing.

6. The blower cooling structure according to claim 3, characterized in that: The fan end cover is provided with a sixth through hole, and the sixth through hole is connected to the first accommodating chamber and the second accommodating chamber to allow the gas passing through the second accommodating chamber to flow to the first accommodating chamber.

7. The blower cooling structure according to claim 2, characterized in that: The third through hole is a waist-shaped hole and is arranged along the circumference of the fan end volute.

8. The blower cooling structure according to claim 6, characterized in that: The cross section of the sixth through hole perpendicular to its own axis is circular, and the axis of the sixth through hole is arranged at an angle with the axis of the rotating shaft.

9. The blower cooling structure according to claim 1, characterized in that: The air inlet holes are evenly arranged along the circumference of the base, the axes of the air inlet holes are perpendicular to the axes of the rotating shaft, and the cross-sections of the air inlet holes perpendicular to their own axes are all circular.

10. The blower cooling structure according to any one of claims 1 to 9, characterized in that: A filter assembly is provided on the machine base, and the filter assembly is detachably arranged in the air inlet. The filter assembly includes a filter screen for preventing impurities from entering the first accommodating cavity along the air inlet.

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