Manufacturing method of air circulating machine shell and air circulating machine

Abstract

The application provides a processing and manufacturing method of an air circulating machine shell and the air circulating machine. The processing and manufacturing method comprises the following steps: fixing and connecting a turbine shell and a compressor shell according to the position in the use state to be integrated, so that the first radial air bearing stator hole section on the turbine shell and the second radial air bearing stator hole section on the compressor shell are oppositely arranged; the boring cutter is penetrated from the first radial air bearing stator hole section to the second radial air bearing stator hole section along the axial direction of the first radial air bearing stator hole section, and the boring cutter is controlled to rotate to bore the first radial air bearing stator hole section and the second radial air bearing stator hole section to the design size at one time. The coaxiality of the radial air suspension bearings at the two ends of the rotating shaft in the rotor system is greatly improved, so that the eccentricity of the rotating shaft is reduced, the abnormal vibration and instability of the rotor are effectively prevented, and the occurrence probability of the bearing abrasion or damage of the air suspension bearing caused by the vibration and instability of the rotating shaft is reduced.

Description

Technical Field

[0001] This invention belongs to the field of air conditioning technology, specifically relating to a method for processing and manufacturing an air circulator housing and an air circulator. Background Technology

[0002] Air circulators are used for compressed air circulation and refrigeration. Because conventional roller bearings experience significant centrifugal force, require continuous lubrication, and easily generate substantial frictional heat, air-bearing bearings, which do not involve direct contact with the rotor, are widely used in air circulators. The air circulator rotor system rotates at high speed under the radial and axial support of the air-bearing bearings. However, the high rotational speed of the rotor system places stringent requirements on its stability. Rotor failure in air circulators is usually caused by severe wear or damage to the foils of the air-bearing bearings. Bearing wear or damage is the direct cause of rotor instability. The most significant factor affecting rotor instability is the misalignment of the radial bearings that mate with the rotor during operation, or uneven bearing load, which increases eccentricity and leads to abnormal rotor vibration. Therefore, a high-precision and reliable air-bearing bearing support scheme is essential for improving the stability of the air circulator rotor. Summary of the Invention

[0003] Therefore, the present invention provides a method for processing and manufacturing an air circulator housing and an air circulator, which can overcome the technical problems in the related art where the air suspension radial bearings at both ends of the rotor system of the air circulator are misaligned, the large eccentricity of the rotor shaft leads to abnormal vibration or even instability of the rotor, and thus leads to wear or damage of the air suspension bearings.

[0004] To address the above problems, the present invention provides a method for manufacturing an air circulator housing, comprising the following steps:

[0005] The turbine housing for housing the turbine and the compressor housing for housing the compressor turbine and impeller are fixedly connected as a whole according to their orientation under the operating conditions, so that the turbine housing with a first radial air bearing stator hole section and the compressor housing with a second radial air bearing stator hole section are arranged opposite to each other.

[0006] The boring tool is inserted along the axial direction of the first radial air bearing stator hole section from the first radial air bearing stator hole section to the second radial air bearing stator hole section, and the boring tool is controlled to rotate so as to bore the first radial air bearing stator hole section and the second radial air bearing stator hole section to the design size in one go.

[0007] In some implementations...

[0008] After the first radial air bearing stator hole section and the second radial air bearing stator hole section are bored to the design dimensions, a plurality of foil positioning grooves are machined on the inner walls of the first radial air bearing stator hole section and the second radial air bearing stator hole section. Each foil positioning groove passes through both ends of the first radial air bearing stator hole section and / or the second radial air bearing stator hole section along the axial direction of the first radial air bearing stator hole section.

[0009] The present invention also provides an air circulator, including an air circulator housing and a rotor assembly contained within the air circulator housing, wherein the air circulator housing is formed by processing and assembling using the aforementioned air circulator housing processing and manufacturing method.

[0010] In some embodiments, the air circulator further includes a corrugated foil and a top foil assembled in the first radial air bearing stator hole section and the second radial air bearing stator hole section, wherein the two ends of the corrugated foil are respectively inserted into the corresponding foil positioning grooves, and the connecting end of the top foil is positioned and inserted into one of the foil positioning grooves and is located radially inside the corrugated foil.

[0011] In some embodiments, the rotor assembly includes the turbine, the compressor, and the impeller. The turbine and the compressor are connected as a single unit via a first shaft, and the compressor is also connected as a single unit to the impeller via a second shaft. The first shaft passes through the central space of the top foil within the first radial air bearing stator bore section, and the second shaft passes through the central space of the top foil within the second radial air bearing stator bore section. The length of the first shaft is less than the length of the second shaft, and the length of the first radial air bearing stator bore section is greater than the length of the second radial air bearing stator bore section.

[0012] In some embodiments, a pressure regulating ring cavity is formed on the side end face of the second radial air bearing stator bore section facing the impeller. The impeller is connected to the first end of the second rotating shaft. A pressure regulating comb sealing ring is also fixedly connected to the first end of the second rotating shaft, and at least a portion of the pressure regulating comb sealing ring is accommodated in the pressure regulating ring cavity.

[0013] In some embodiments, a first comb-tooth sealing ring is connected to the end face of the second radial air bearing stator bore section facing the compressor wheel, the inner diameter of the first comb-tooth sealing ring being smaller than the diameter of the circle containing the radial outer ends of each foil positioning groove; and / or, a retaining ring is connected to the end face of the second radial air bearing stator bore section facing the impeller, the retaining ring being used to limit the axial displacement of the top foil and the corrugated foil on one side; and / or, a pin is also inserted into the slot facing the impeller of the foil positioning groove where the connecting end fold is inserted.

[0014] In some embodiments, the first rotating shaft has a thrust plate extending radially outward therefrom, and a second comb-tooth sealing ring is connected to the end face of the turbine housing away from the compressor wheel. The second comb-tooth sealing ring and the end face of the turbine housing away from the compressor wheel form a receiving ring cavity for accommodating the thrust plate. The receiving ring cavity is also provided with a first axial air bearing and a second axial air bearing. The first axial air bearing and the second axial air bearing are respectively located on both sides of the thrust plate, and the axial distance between them and the thrust plate is adjusted by floating under air pressure.

[0015] In some embodiments, a gap adjustment ring is provided between the second comb-tooth sealing ring and the end face of the turbine housing away from the compressor wheel; and / or, a plurality of bearing pins parallel to the axial direction of the first rotating shaft are provided in the accommodating ring cavity, the two ends of the bearing pins are clamped and fixed by the second comb-tooth sealing ring and the end face of the turbine housing away from the compressor wheel, and the first axial air bearing and the second axial air bearing are slidably sleeved on each of the bearing pins.

[0016] In some embodiments, both the first and second rotating shafts are hollow cylindrical structures, and the rotor assembly further includes a connecting rod that passes sequentially through the turbine, the first rotating shaft, the second rotating shaft of the compressor, and the impeller along the axial direction of the first rotating shaft, so that the turbine, the first rotating shaft, the second rotating shaft of the compressor, and the impeller are connected as a whole.

[0017] This invention provides a method for processing and manufacturing an air circulator housing; the air circulator has the following characteristics.

[0018] Beneficial effects:

[0019] The first and second radial air bearing stator bore sections are machined to their designed dimensions in a single boring operation on both the turbine housing and compressor housing, depending on their operating conditions. This boring process ensures the coaxiality of the two radial air bearing stator bore sections spaced apart along the boring bar's axis. The machined first and second radial air bearing stator bore sections directly serve as the stator outer rings of the radial air suspension bearings at both ends (i.e., the stator outer rings are integrally formed with the corresponding housings rather than being assembled). This process ensures high machining accuracy and eliminates the assembly errors caused by the traditional method of first machining the bearing housing and then assembling the air suspension bearing stator outer rings separately within the corresponding bearing housings. This significantly improves the coaxiality of the radial air suspension bearings at both ends of the rotor shaft in the rotor system, thereby reducing the shaft's eccentricity, effectively preventing abnormal rotor vibration and instability, and reducing the probability of bearing wear or damage caused by shaft vibration and instability.

[0020] Multiple foil positioning grooves are machined on the inner walls of the first radial gas bearing stator hole section and the second radial gas bearing stator hole section. The foil positioning grooves pass through both ends of the corresponding hole section along the axial direction, which facilitates the assembly of each corrugated foil and the top foil in the corresponding foil positioning groove. At the same time, designing the foil positioning grooves as axially through grooves can also reduce the processing difficulty and thus reduce the processing cost.

[0021] Since the axial length of the first shaft is less than the axial length of the second shaft, the overall center of mass of the rotor assembly is close to one side of the first shaft. At this time, the axial length of the stator hole section of the first radial air bearing that is supported and cooperated with the first shaft is designed to be greater than the axial length of the stator hole section of the second radial air bearing that is supported and cooperated with the second shaft. This makes the ratio of bearing load per unit area the same, thereby significantly improving bearing tilt.

[0022] The first comb-tooth sealing ring, the second comb-tooth sealing ring, and the third comb-tooth sealing ring in this invention not only seal the airflow but also serve as axial limiting components for the corrugated foil and top foil within the corresponding radial air suspension bearings. This simplifies the internal structure of the air circulator of this invention, eliminating the need for separate limiting components at the corresponding positions. Attached Figure Description

[0023] To more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below. The drawings described below are merely exemplary, and those skilled in the art can derive other embodiments based on the provided drawings without creative effort.

[0024] Figure 1 This is a step diagram of the processing and manufacturing method of the air circulator housing in an embodiment of the present invention;

[0025] Figure 2 This is a three-dimensional structural schematic diagram of the air circulator in an embodiment of the present invention;

[0026] Figure 3 yes Figure 2 A cross-sectional view of an air circulator in a central location;

[0027] Figure 4 yes Figure 2 A cross-sectional view of the air circulator in the middle from another perspective;

[0028] Figure 5 yes Figure 4 A magnified view of a section at point A in the middle;

[0029] Figure 6This is a schematic diagram of the axial state after the top foil, the top foil, and the retaining ring are assembled in the stator hole section of the second radial gas bearing in this embodiment of the invention.

[0030] The attached figures are labeled as follows:

[0031] 11. Turbine; 12. Turbine housing; 121. First radial air bearing stator bore section; 13. First rotating shaft; 131. Thrust plate; 14. Second comb tooth sealing ring; 15. Clearance adjusting ring; 16. Third comb tooth sealing ring; 21. Compressor wheel; 22. Impeller; 23. Compressor housing; 231. Second radial air bearing stator bore section; 232. Pressure regulating ring cavity; 24. Second rotating shaft; 25. Pressure regulating comb tooth sealing ring; 26. First comb tooth sealing ring; 27. Retaining ring; 28. Pin; 31. Foil positioning groove; 32. Corrugated foil; 33. Top foil; 331. Connecting end fold; 41. First axial air bearing; 42. Second axial air bearing; 43. Bearing pin; 5. Connecting rod; 6. Temperature control housing; T01. Turbine housing inlet; T02. Turbine housing outlet; C01. Compressor housing inlet; C02. Compressor housing outlet. Detailed Implementation

[0032] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present invention or its application or use. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0033] In the description of this invention, it should be understood that the orientation or positional relationship indicated by directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" is generally based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this invention and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this invention; the directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0034] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90° or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0035] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore should not be construed as limiting the scope of protection of this invention.

[0036] See Figure 1 and Figure 6 As shown, according to an embodiment of the present invention, a method for manufacturing an air circulator housing is provided, comprising the following steps: a turbine housing 12 for housing a turbine 11 and a compressor housing 23 for housing a compressor impeller 21 and an impeller 22 are fixedly connected as a single unit according to their orientation in use, such that a first radial air bearing stator hole section 121 on the turbine housing 12 and a second radial air bearing stator hole section 231 on the compressor housing 23 are arranged opposite to each other. It is understood that the turbine housing 12 and the compressor housing 23 are integrally cast by injection molding before this step, and the first radial air bearing stator hole section 121 and the second radial air bearing stator hole section 231 are also initially formed during this casting process, but the dimensional accuracy, such as coaxiality, is relatively low. In this step, the turbine housing 12 and the compressor housing 23 are connected by connecting flanges according to their specific housing configurations. The boring tool is inserted along the axial direction of the first radial air bearing stator hole section 121 from the first radial air bearing stator hole section 121 to the second radial air bearing stator hole section 231, and the boring tool is controlled to rotate so that the first radial air bearing stator hole section 121 and the second radial air bearing stator hole section 231 are bored to the design dimensions in one operation. The aforementioned design dimensions specifically include the hole diameters of the first radial air bearing stator hole section 121 and the second radial air bearing stator hole section 231 on both sides, as well as the coaxiality and positional accuracy between the two holes. The aforementioned "in one operation" refers to the two stator hole sections at both ends of the boring tool being bored to the desired position in one machining operation.

[0037] In this technical solution, the first radial air bearing stator hole section 121 and the second radial air bearing stator hole section 231 are machined to the design dimensions in one go using a boring tool, depending on the operating conditions of both the turbine housing 12 and the compressor housing 23. During the boring process, the coaxiality of the two radial air bearing stator hole sections, which are spaced apart along the boring tool axis, can be guaranteed. The machined first radial air bearing stator hole section 121 and the second radial air bearing stator hole section 231 directly serve as the stator outer rings of the radial air suspension bearings at both ends (that is, the stator outer rings are integrally formed with the corresponding housings rather than being assembled). The machining accuracy is easy to guarantee, eliminating the assembly errors caused by the traditional method of first machining the bearing housing and then assembling the air suspension bearing stator outer rings separately in the corresponding bearing housings. This greatly improves the coaxiality of the radial air suspension bearings at both ends of the rotor system, thereby reducing the eccentricity of the rotor shaft, effectively preventing abnormal rotor vibration and instability, and reducing the probability of bearing wear or damage caused by rotor shaft vibration and instability.

[0038] In some embodiments, after the first radial air bearing stator hole section 121 and the second radial air bearing stator hole section 231 are bored to the designed dimensions, a plurality of foil positioning grooves 31 are machined on the inner walls of the first radial air bearing stator hole section 121 and the second radial air bearing stator hole section 231. Each foil positioning groove 31 extends through both ends of the first radial air bearing stator hole section 121 and / or the second radial air bearing stator hole section 231 along the axial direction of the first radial air bearing stator hole section 121. The aforementioned foil positioning grooves 31 can be formed by wire cutting.

[0039] In this technical solution, multiple foil positioning grooves 31 are machined on the inner walls of the first radial gas bearing stator hole section 121 and the second radial gas bearing stator hole section 231. The foil positioning grooves 31 extend through both ends of the corresponding hole section along the axial direction, which facilitates the assembly of each wave foil 32 and top foil 33 in the corresponding foil positioning grooves 31. At the same time, designing the foil positioning grooves 31 as axially extending through grooves can also reduce the processing difficulty and thus reduce the processing cost.

[0040] According to embodiments of the present invention, an air circulator is also provided, including an air circulator housing and a rotor assembly contained within the air circulator housing. The air circulator housing is formed by processing and assembly using the aforementioned air circulator housing processing and manufacturing method. In some embodiments, the air circulator further includes a corrugated foil 32 and a top foil 33 assembled within the first radial air bearing stator bore section 121 and the second radial air bearing stator bore section 231, wherein the two end folds of the corrugated foil 32 are respectively inserted into the corresponding foil positioning grooves 31, and the connecting end fold 331 of the top foil 33 is positioned and inserted into one of the foil positioning grooves 31 and is located radially inside the corrugated foil 32.

[0041] In this technical solution, by inserting the two ends of the corrugated foil 32 into the foil positioning groove 31, and simultaneously inserting the connecting end 331 of the top foil 33 into the corresponding foil positioning groove 31, the position stability of the corrugated foil 32 and the top foil 33 can be reliably and stably achieved.

[0042] In some embodiments, the rotor assembly includes the turbine 11, the compressor 21, and the impeller 22. The turbine 11 and the compressor 21 are connected as one unit via a first rotating shaft 13. The compressor 21 is also connected as one unit to the impeller 22 via a second rotating shaft 24. The first rotating shaft 13 passes through the central space of the top foil 33 (i.e., the rotor suspension area) within the first radial air bearing stator bore section 121. The second rotating shaft 24 passes through the central space of the top foil 33 (i.e., the rotor suspension area) within the second radial air bearing stator bore section 231. The length of the first rotating shaft 13 is less than the length of the second rotating shaft 24, and the length of the first radial air bearing stator bore section 121 is greater than the length of the second radial air bearing stator bore section 231.

[0043] In this technical solution, since the axial length of the first rotating shaft 13 is less than the axial length of the second rotating shaft 24, the overall center of mass of the rotor assembly is close to one side of the first rotating shaft 13. At this time, the axial length of the first radial air bearing stator hole section 121 that supports and cooperates with the first rotating shaft 13 is designed to be greater than the axial length of the second radial air bearing stator hole section 231 that supports and cooperates with the second rotating shaft 24. This allows the bearing to bear the same unit area ratio, thereby significantly improving bearing tilt.

[0044] See details Figure 3As shown, in some embodiments, a pressure regulating ring cavity 232 is formed on the side end face of the second radial air bearing stator bore section 231 facing the impeller 22. The impeller 22 is connected to the first end of the second rotating shaft 24. A pressure regulating comb tooth sealing ring 25 is also fixedly connected to the first end of the second rotating shaft 24. At least a portion of the pressure regulating comb tooth sealing ring 25 is accommodated in the pressure regulating ring cavity 232. A pressure regulating flow gap is formed between the outer ring comb teeth of the pressure regulating comb tooth sealing ring 25 and the pressure regulating ring cavity 232.

[0045] In this technical solution, the pressure regulating comb seal ring 25 is fixedly connected to the second rotating shaft 24. That is, when the second rotating shaft 24 rotates, the pressure regulating comb seal ring 25 also rotates synchronously with it. The left annular surface of the pressure regulating comb seal 25 located in the pressure regulating ring cavity is the load surface. The air pressure in the pressure regulating ring cavity 232, which is higher than atmospheric pressure, acts on the load surface. Compared with the atmospheric pressure on the outside of the pressure regulating comb seal 25, a pressure difference will be generated at both ends of the axial direction of the pressure regulating comb seal 25. This pressure difference will balance the axial force of the rotating shaft to reduce the load force of the first axial air bearing 41 and the second axial air bearing 42, thereby ensuring the stability of the axial position of the rotating shaft.

[0046] In some embodiments, a first comb-tooth sealing ring 26 is connected to one end face of the second radial air bearing stator bore section 231 facing the compressor wheel 21. The inner diameter of the first comb-tooth sealing ring 26 is smaller than the diameter of the circle containing the radial outer ends of each foil positioning groove 31. In this way, the first comb-tooth sealing ring 26 can not only effectively reduce the leakage of the high-pressure airflow generated by the compressor wheel 21 at its setting position, but also block one end of the through foil positioning groove 31, thereby preventing the corrugated foil 32 and the top foil 33 from coming out of the groove position.

[0047] Due to the aforementioned pressure regulating ring cavity 232, the slot of the foil positioning groove 31 facing the impeller 22 lacks a necessary limiting structure. In a preferred embodiment, a retaining ring 27 is connected to the end face of the second radial air bearing stator bore section 231 facing the impeller 22. The retaining ring 27 is used to limit the axial displacement of the top foil 33 and the corrugated foil 32 on one side. Specifically, the retaining ring 27 is bolted to the concave end face of the compressor housing 23 corresponding to the aforementioned pressure regulating ring cavity 232.

[0048] In another preferred embodiment, a pin 28 is also inserted into the slot on the side of the foil positioning groove 31 on which the connecting end fold 331 is inserted, facing the impeller 22. The aforementioned pin 28 uses an interference fit to fix the corresponding folds of the top foil 33 and the corrugated foil 32 in the foil positioning groove 31.

[0049] In some embodiments, the first rotating shaft 13 has a thrust plate 131 extending radially outward therefrom. A second comb-tooth sealing ring 14 is connected to the end face of the turbine housing 12 away from the compressor wheel 21, and a receiving ring cavity (not indicated in the figure) is formed between the second comb-tooth sealing ring 14 and the end face of the turbine housing 12 away from the compressor wheel 21 to accommodate the thrust plate 131. A first axial air bearing 41 and a second axial air bearing 42 are also provided in the receiving ring cavity. The first axial air bearing 41 and the second axial air bearing 42 are respectively located on both sides of the thrust plate 131, and the axial distance between them and the thrust plate 131 is adjusted by floating under air pressure.

[0050] In this technical solution, the axial position of the rotating shaft is limited by the aforementioned thrust plate 131, the first axial air bearing 41, and the second axial air bearing 42.

[0051] In some embodiments, a clearance adjustment ring 15 is sandwiched between the second comb-tooth sealing ring 14 and the end face of the turbine housing 12 away from the compressor wheel 21.

[0052] In this technical solution, gap adjustment rings 15 with different axial thicknesses can be selected according to the actual application conditions to meet different axial air suspension positioning requirements.

[0053] The accommodating annular cavity is provided with multiple bearing pins 43 parallel to the axial direction of the first rotating shaft 13. The two ends of the bearing pins 43 are clamped and fixed by the second comb-tooth sealing ring 14 and the end face of the turbine housing 12 away from the compressor wheel 21. The first axial air bearing 41 and the second axial air bearing 42 are slidably sleeved on each of the bearing pins 43, thereby realizing the floating adjustment of the axial position of the first axial air bearing 41 and the second axial air bearing 42.

[0054] See details Figure 3 As shown, it also includes a third comb-tooth sealing ring 16 connected to the turbine housing 12 near the compressor wheel 21. The second axial air bearing 42 and the third comb-tooth sealing ring 16 are respectively located at the two ends of the first radial air bearing stator hole section 121, thereby sealing the two ends of the slots of each foil positioning groove 31 on the first radial air bearing stator hole section 121, thereby realizing the positioning of the axial positions of each wave foil 32 and top foil 33 assembled on it.

[0055] The aforementioned first comb-tooth sealing ring 26, second comb-tooth sealing ring 14, and third comb-tooth sealing ring 16 are structurally similar. They are all fixedly connected to the corresponding housing and arranged radially outward around the rotating shaft. The comb teeth on the radial inner wall of each sealing ring are used to seal the airflow and prevent leakage. It is worth emphasizing that, unlike the function of traditional comb-tooth sealing rings, the first comb-tooth sealing ring 26, second comb-tooth sealing ring 14, and third comb-tooth sealing ring 16 in this invention, while sealing the airflow, also serve as axial limiting components for the corrugated foil 32 and top foil 33 in the corresponding radial air suspension bearing. This simplifies the internal structure of the air circulator of this invention and eliminates the need to separately configure corresponding limiting components at the corresponding positions.

[0056] In some embodiments, both the first rotating shaft 13 and the second rotating shaft 24 are hollow cylindrical structures. The rotor assembly also includes a connecting rod 5, which passes through the turbine 11, the first rotating shaft 13, the compressor 21, the second rotating shaft 24, and the impeller 22 sequentially along the axial direction of the first rotating shaft 13, so that the turbine 11, the first rotating shaft 13, the compressor 21, the second rotating shaft 24, and the impeller 22 are connected as a whole, and the structural connection is reliable and stable.

[0057] In addition, the hollow cylindrical structure of the first rotating shaft 13 and the second rotating shaft 24 can also make their interiors serve as channels for cooling airflow. At this time, corresponding through holes are provided at the positions of the first rotating shaft 13 and the second rotating shaft 24 corresponding to the aforementioned axial air suspension bearing and radial air suspension bearing, respectively, so as to cool the aforementioned axial air suspension bearing and radial air suspension bearing.

[0058] In another preferred embodiment, a temperature control housing 6 is also connected to the outlet side of the turbine housing 12.

[0059] It will be readily understood by those skilled in the art that, without conflict, the advantageous technical features of the above-mentioned methods can be freely combined and superimposed.

[0060] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention. The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present invention, and these improvements and modifications should also be considered within the protection scope of the present invention.

Claims

1. A method for processing and manufacturing the casing of an air circulator, characterized in that, Includes the following steps: The turbine housing (12) for housing the turbine (11) and the compressor housing (23) for housing the compressor (21) and impeller (22) are fixedly connected as a whole according to their orientation in the operating state, so that the turbine housing (12) with a first radial air bearing stator hole section (121) and the compressor housing (23) with a second radial air bearing stator hole section (231) are arranged opposite to each other; The boring bar is inserted along the axial direction of the first radial air bearing stator hole section (121) from the first radial air bearing stator hole section (121) to the second radial air bearing stator hole section (231), and the boring bar is controlled to rotate so that the first radial air bearing stator hole section (121) and the second radial air bearing stator hole section (231) are bored to the design size in one go, so that the first radial air bearing stator hole section (121) and the second radial air bearing stator hole section (122) can be directly used as the stator outer ring of the radial air suspension bearings at both ends. After the first radial air bearing stator hole section (121) and the second radial air bearing stator hole section (231) are bored to the design dimensions, a plurality of foil positioning grooves (31) are machined on the inner walls of the first radial air bearing stator hole section (121) and the second radial air bearing stator hole section (231). Each foil positioning groove (31) passes through both ends of the first radial air bearing stator hole section (121) and / or the second radial air bearing stator hole section (231) along the axial direction of the first radial air bearing stator hole section (121).

2. An air circulator, comprising an air circulator housing and a rotor assembly contained within the air circulator housing, characterized in that, The air circulator housing is manufactured and assembled using the air circulator housing manufacturing method described in claim 1.

3. The air circulator according to claim 2, characterized in that, It also includes a corrugated foil (32) and a top foil (33) assembled in the first radial gas bearing stator hole section (121) and the second radial gas bearing stator hole section (231), wherein the two ends of the corrugated foil (32) are respectively inserted into the corresponding foil positioning grooves (31), and the connecting end of the top foil (33) is positioned and inserted into one of the foil positioning grooves (31) and is located on the radial inner side of the corrugated foil (32).

4. The air circulator according to claim 3, characterized in that, The rotor assembly includes the turbine (11), the compressor (21), and the impeller (22). The turbine (11) and the compressor (21) are connected as one unit via a first rotating shaft (13). The compressor (21) is also connected as one unit to the impeller (22) via a second rotating shaft (24). The first rotating shaft (13) passes through the central space of the top foil (33) within the first radial air bearing stator hole section (121). The second rotating shaft (24) passes through the central space of the top foil (33) within the second radial air bearing stator hole section (231). The length of the first rotating shaft (13) is less than the length of the second rotating shaft (24), and the length of the first radial air bearing stator hole section (121) is greater than the length of the second radial air bearing stator hole section (231).

5. The air circulator according to claim 4, characterized in that, A pressure regulating ring cavity (232) is formed on the side end face of the second radial air bearing stator bore section (231) facing the impeller (22). The impeller (22) is connected to the first end of the second rotating shaft (24). A pressure regulating comb sealing ring (25) is also fixedly connected to the first end of the second rotating shaft (24), and at least a portion of the pressure regulating comb sealing ring (25) is accommodated in the pressure regulating ring cavity (232).

6. The air circulator according to claim 5, characterized in that, A first comb-tooth sealing ring (26) is connected to the end face of the second radial air bearing stator hole section (231) facing the compressor (21). The inner diameter of the first comb-tooth sealing ring (26) is smaller than the diameter of the circle containing the radial outer end of each foil positioning groove (31). And / or, a retaining ring (27) is connected to the end face of the second radial air bearing stator hole section (231) facing the impeller (22). The retaining ring (27) is used to limit the axial displacement of the top foil (33) and the corrugated foil (32) on one side. And / or, a pin (28) is also inserted into the slot of the foil positioning groove (31) with the connecting end fold (331) facing the impeller (22).

7. The air circulator according to claim 4, characterized in that, The first rotating shaft (13) has a thrust plate (131) extending radially outward. A second comb-tooth sealing ring (14) is connected to the end face of the turbine housing (12) away from the compressor wheel (21). The second comb-tooth sealing ring (14) and the end face of the turbine housing (12) away from the compressor wheel (21) form a receiving ring cavity for accommodating the thrust plate (131). The receiving ring cavity is also provided with a first axial air bearing (41) and a second axial air bearing (42). The first axial air bearing (41) and the second axial air bearing (42) are respectively located on both sides of the thrust plate (131), and the axial distance between them and the thrust plate (131) is adjusted by floating under air pressure.

8. The air circulator according to claim 7, characterized in that, A clearance adjustment ring (15) is provided between the second comb-tooth sealing ring (14) and the end face of the turbine housing (12) away from the compressor wheel (21); and / or, a plurality of bearing pins (43) parallel to the axial direction of the first rotating shaft (13) are provided in the accommodating ring cavity, and the two ends of the bearing pins (43) are clamped and fixed by the second comb-tooth sealing ring (14) and the end face of the turbine housing (12) away from the compressor wheel (21), and the first axial air bearing (41) and the second axial air bearing (42) are slidably sleeved on each of the bearing pins (43).

9. The air circulator according to claim 4, characterized in that, The first rotating shaft (13) and the second rotating shaft (24) are both hollow cylindrical structures. The rotor assembly also includes a connecting rod (5). The connecting rod (5) passes through the turbine (11), the first rotating shaft (13), the compressor (21), the second rotating shaft (24) and the impeller (22) in sequence along the axial direction of the first rotating shaft (13) so that the turbine (11), the first rotating shaft (13), the compressor (21), the second rotating shaft (24) and the impeller (22) are connected as a whole.

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