Abstract
A rotor-stator axial air moving device includes a housing, a rotor, and a stator. The rotor and the stator are disposed in the housing. The rotor includes a rotor hub and multiple rotor blades. The stator includes a stator hub and multiple stator blades. Each stator blade includes a blade root and a blade tip. The pitch angle is defined between the nose-tail line of wing section and a rotation direction of the axial air moving device. The pitch angles from the blade root to the blade tip of the wing section of each stator blade are configured in a manner of gradually increasing and then gradually decreasing.
Claims
1. A rotor-stator axial air moving device, comprising: a housing; a rotor, disposed in the housing, and comprising a rotor hub of a first cylinder and a plurality of rotor blades arranged annularly and spacedly on a periphery of the rotor hub; and a stator, disposed in the housing and located on a downstream side of the rotor, and comprising a stator hub of a second cylinder and a plurality of stator blades arranged annularly and spacedly, each stator blade comprising a blade root connected to the stator hub and a blade tip located away from the stator hub; wherein, each stator blade is configured by a plurality of wing sections being stacked continuously, and a pitch angle is defined between a nose-tail line of each wing section and a rotation direction of the axial air moving device; and wherein, the pitch angles from the blade root to the blade tip of the wing section of each stator blade are configured in a manner of gradually increasing and then gradually decreasing.
2. The rotor-stator axial air moving device in claim 1, wherein a maximum pitch angle of the wing section of each stator blade is located between a span position of 0.15 to the span position of 0.75.
3. The rotor-stator axial air moving device in claim 1, wherein the stator hub comprises a cylinder, and the stator blades are arranged on a periphery of the stator hub.
4. The rotor-stator axial air moving device in claim 1, wherein the stator blades are connected to an inner wall of the housing.
5. The rotor-stator axial air moving device in claim 1, wherein the pitch angle direction of the stator blade is opposite to that of the rotor blade.
Description
BRIEF DESCRIPTION OF DRAWINGS
[0008] The features of the disclosure believed to be novel are set forth with particularity in the appended claims. The disclosure itself, however, may be best understood by reference to the following detailed description of the disclosure, which describes a number of exemplary embodiments of the disclosure, taken in conjunction with the accompanying drawings, in which:
[0009] FIG. 1 is a cross sectional view of the rotor-stator axial air moving device in the related art.
[0010] FIG. 2 is a curve diagram of the distribution of pitch angle of the stator blade of the rotor-stator axial air moving device in the related art.
[0011] FIG. 3 is a perspective exploded schematic view of the rotor-stator axial air moving device in this disclosure.
[0012] FIG. 4 is a planar view of the assembly of the housing and the stator in this disclosure.
[0013] FIG. 5A is a schematic view of the blade angle of the stator blade near the blade root in this disclosure.
[0014] FIG. 5B is a schematic view of the blade angle between the blade root and the blade tip of the stator blade in this disclosure.
[0015] FIG. 5C is a schematic view of the blade angle near the blade tip of the stator blade in this disclosure.
[0016] FIG. 6 is a curve diagram of the distribution of pitch angle of the stator blade in this disclosure.
[0017] FIG. 7 is a comparison diagram of the P-Q performance curve of the rotor-stator axial air moving device in this disclosure and the related art.
[0018] FIG. 8 is a comparison diagram of the efficiency curve of the rotor-stator axial air moving device in this disclosure and the related art.
[0019] FIG. 9 is a perspective exploded schematic view of the rotor-stator axial air moving device of another embodiment in this disclosure.
[0020] FIG. 10 is a planar view of assembly of the housing and the stator of another embodiment in this disclosure.
[0021] FIG. 11A is a schematic view of the blade angle near the blade root of the stator blade of another embodiment in this disclosure.
[0022] FIG. 11B is a schematic view of the blade angle between the blade root and the blade tip of the stator blade of another embodiment in this disclosure.
[0023] FIG. 11C is a schematic view of the blade angle near the blade tip of the stator blade of another embodiment in this disclosure.
[0024] FIG. 12 is a curve diagram of the distribution of pitch angle of the stator blade of another embodiment in this disclosure.
DETAILED DESCRIPTION OF THE EMBODIMENTS
[0025] The technical contents of this disclosure will become apparent with the detailed description of embodiments accompanied with the illustration of related drawings as follows. It is intended that the embodiments and drawings disclosed herein are to be considered illustrative rather than restrictive.
[0026] Please refer to FIG. 3 and FIG. 4, which respectively depict a perspective exploded schematic view of the rotor-stator axial air moving device in this disclosure and a planar view of assembly of the housing and the stator in this disclosure. The rotor-stator axial air moving device 1 of this disclosure includes a housing 10, a rotor 20 and a stator 30. The rotor 20 and the stator 30 are combined in the housing 10. The stator 30 is disposed on the downstream side of the rotor 20 to constitute the rotor-stator axial air moving device 1.
[0027] The housing 10 is a frame base and has an accommodating space 100. The rotor 20 is disposed in the housing 10. The rotor 20 includes a rotor hub 21 and a plurality of rotor blades 22 arranged annularly and spacedly on the periphery of the rotor hub 21. In addition, the stator 30 is disposed in the housing 10 and located on the downstream side of the rotor 20. The stator 30 includes a stator hub 31 and a plurality of stator blades 32 arranged annularly and spacedly.
[0028] In this embodiment, the stator hub 31 is a cylinder. The stator blades 32 are arranged on the periphery of the stator hub 31, and the stator blades 32 are connected to the inner wall of the housing 10. Furthermore, the pitch angle direction of the stator blade 32 is opposite to that of the rotor blade 20.
[0029] Specifically, each of the stator blades 32 includes a blade root 321 connected to the stator hub 31 and a blade tip 322 located away from the stator hub 31. Moreover, each of the stator blades 32 is configured by stacking multiple wing sections continuously. Please refer to FIG. 4, in this embodiment, the cross-sectional views of the wing sections are provided at three positions including the position at the blade root, the position between the blade root and the blade tip, and the position at the blade tip of the stator blade 32.
[0030] Please further refer to FIG. 5A to FIG. 5C and FIG. 6, they respectively depict schematic views of the blade angle near the blade root, between the stator blade and the blade root, and near the blade tip of the stator blade in this disclosure, and a curve diagram of the distribution of pitch angle of the stator blade in this disclosure. Each of the stator blades 32 is configured by stacking multiple wing sections continuously. It should be noted that, the pitch angle is defined between the nose-tail line of the wing section each and the rotation direction u of the rotor-stator axial air moving device 1.
[0031] FIG. 5A shows that the pitch angleθ2 formed by the nose-tail line LB of the wing section BB near the blade root 321 and the rotation direction u of the rotor-stator axial air moving device 1 is about 51.209 degrees. In addition, FIG. 5B shows that the pitch angleθ3 formed by the nose-tail line LB of the wing section BB between the blade root 321 and the blade tip 322 and the rotation direction u of the rotor-stator axial air moving device 1 is about 52.670 degrees. Moreover, FIG. 5C shows that the pitch angleθ4 formed by the nose-tail line LB of the wing section BB near the blade tip 322 and the rotation direction u of the rotor-stator axial air moving device 1 is about 42.833 degrees. From the above, the maximum pitch angle of the stator blade 32 is located between the blade root 321 and the blade tip 322.
[0032] As shown in FIG. 6, specifically, the pitch angles from the blade root 321 to the blade tip 322 of the wing section of each stator blade 32 in this disclosure have the trend of gradually increasing and then gradually decreasing. In some embodiments, the maximum pitch angle of the wing section of each stator blade 32 is located between the span position of about 0.15 and the span position of about 0.75. In this embodiment, the maximum pitch angle of the wing section of the stator blade 32 is located at the span position of about 0.43 for about 54.060 degrees.
[0033] It should be noted that the span position is defined as the position radius (r) minus the radius of the blade root (Rr) and then divided by the radius of the blade tip (Rt) minus the radius of the blade root (Rr). The formula is as follows. Accordingly, the span position at the blade root connected to the hub is defined as 0, and the span position at the blade tip is defined as 1.
[00001]
[0034] Please refer to FIG. 7 and FIG. 8, which respectively depict comparison diagrams of the P-Q performance curve and the efficiency curve of the rotor-stator axial air moving devices in this disclosure and the related art respectively. As shown in the figures, the operation area of the rotor-stator axial air moving device of the related-art is mostly located on the right section of the curves. Furthermore, comparing with the rotor-stator axial air moving device of the related art, the rotor-stator axial air moving device of this disclosure has a better P-Q performance curve and efficiency under the aforementioned stator blade structure. That is, the stator blade structure of the rotor-stator axial air moving device of this disclosure may improve the P-Q performance curve and enhance the efficiency of the axial air moving device.
[0035] Please further refer to FIG. 9 and FIG. 10, they respectively depict a perspective exploded schematic view of the rotor-stator axial air moving device and a planar view of assembly of the housing and the stator of another embodiment in this disclosure. The rotor-stator axial air moving device 1b includes a housing 10b, a rotor 20b and a stator 30b. The rotor 20b and the stator 30b are combined in the housing 10b. The stator 30b is disposed on the downstream side of the rotor 20b. The stator 30b includes a stator hub 31b and a plurality of stator blades 32b arranged annularly and spacedly.
[0036] It should be noted that the stator blade 32b in this embodiment has a forward swept wing, but it is not limited thereto. This embodiment illustrates that the stator blade structure of this disclosure is not restricted to have a specific swept wing.
[0037] Please refer to FIG. 11A to FIG. 11C and FIG. 12, they respectively depict schematic views of the pitch angle near the blade root, between the blade root and the blade tip, and near the blade tip of the stator blade of another embodiment in this disclosure, and a curve diagram of the distribution of pitch angles of the stator blade of another embodiment in this disclosure. FIG. 11A shows the pitch angleθ5 formed between the nose-tail line LC of the wing section BC near the blade root 321b of the stator blade 32b and the rotation direction u of the rotor-stator axial air moving device 1b is about 47.478 degrees. In addition, FIG. 11B shows that the pitch angleθ6 formed between the nose-tail line LC of the wing section BC between the blade root 321b and the blade tip 322b of the stator blade 32b and the rotation direction u of the rotor-stator axial air moving device 1b is about 54.792 degrees. Moreover, FIG. 11C shows the pitch angle67 formed between the nose-tail line LC of the wing section BC near the blade tip 322b of the stator blade 32b and the rotation direction u of the rotor-stator axial air moving device 1b is about 46.589 degrees. From the above, the maximum pitch angle of the stator blade 32b is located between the blade root 321b and the blade tip 322b.
[0038] As shown in FIG. 12, more specifically, the pitch angles from the blade root 321b to the blade tip 322b of the wing section of the stator blade 32b of this disclosure have the trend of gradually increasing and then gradually decreasing. In some embodiments, the maximum pitch angle of the wing section of the stator blade 32b each is located between the span position of about 0.15 and the span position of about 0.75. In this embodiment, the maximum pitch angle of the stator blade 32b is located at the span position of about 0.5 for about 53.590 degrees.
[0039] In summary, the pitch angles from the blade root to the blade tip of the stator blade structure of this disclosure have the trend of gradually increasing and then decreasing. In addition, comparing with the rotor-stator axial air moving device of the related art, the rotor-stator axial air moving device of this disclosure may improve the P-Q performance curve and enhance the efficiency of the axial air moving device under the aforementioned stator blade structure.
[0040] While this disclosure has been described by means of specific embodiments, numerous modifications and variations could be made thereto by those skilled in the art without departing from the scope and spirit of this disclosure set forth in the claims.
