阅读说明：本技术 一种提高进风量的三元叶轮叶片结构 (Ternary impeller blade structure for improving air intake ) 是由 徐伟 于 2021-09-13 设计创作，主要内容包括：本发明提供了一种提高进风量的三元叶轮叶片结构,所述三元叶轮叶片包括轮盘、叶片以及轴孔,所述叶片远离轮盘的一端面设置有尖角,所述尖角倾斜设置,以三元叶轮旋转方向为准,所述叶片与轴孔之间设置有端面槽,所述端面槽垂直于轮盘方向,切入至叶片中；本发明的有益效果：本发明具有尖角、端面槽的三元叶轮的结构,能在不设置有尖角、端面槽的叶片上进一步提高三元叶轮的进风流量,通过试验得知,在设置有尖角、端面槽的三元叶轮的结构,能够使得大量的空气的从进风口导入至出风口处,提高了空气流通的流畅性。(The invention provides a ternary impeller blade structure for improving air intake, which comprises a wheel disc, blades and a shaft hole, wherein one end surface of each blade, which is far away from the wheel disc, is provided with a sharp corner, the sharp corner is obliquely arranged on the basis of the rotation direction of a ternary impeller, an end surface groove is arranged between each blade and the shaft hole, and the end surface groove is perpendicular to the direction of the wheel disc and is cut into each blade; the invention has the beneficial effects that: the structure of the ternary impeller with the sharp corners and the end surface grooves can further improve the air inlet flow of the ternary impeller on blades without the sharp corners and the end surface grooves, and experiments show that the structure of the ternary impeller with the sharp corners and the end surface grooves can lead a large amount of air into the air outlet from the air inlet, so that the fluency of air circulation is improved.)

1. The utility model provides an improve ternary impeller blade structure of intake, includes blade (20), blade (20) shaping and ring-shaped distribution on rim plate (10), be provided with shaft hole (30), its characterized in that between blade (20): a sharp corner (21) is arranged at an air inlet of the blade (20), and the sharp corner (21) is obliquely arranged.

2. The utility model provides an improve ternary impeller blade structure of intake, includes blade (20), blade (20) shaping and ring-shaped distribution on rim plate (10), be provided with shaft hole (30), its characterized in that between blade (20): the air intake department of blade (20) is provided with terminal surface groove (22), and terminal surface groove (22) along shaft hole (30) ring-type distribution, terminal surface groove (22) cut into to blade (20) along the axial.

3. The three-element impeller blade structure for improving the intake of air according to claim 1, wherein: the blade (20) comprises a first bending surface (23) and a second bending surface (24), the sharp corner (21) comprises a smooth surface (211), the smooth surface (211) is formed by cutting, an included angle alpha is formed between the smooth surface (211) and a horizontal line, alpha ranges from 0 degree to 30 degrees, and the smooth surface (211) is always arranged on the first bending surface (23).

4. The three-element impeller blade structure for improving the intake of air according to claim 3, wherein: the top end of the sharp corner (21) is provided with a fillet (212), the radius of the fillet (212) is 0.5mm, and the fillet (212) is always arranged close to the direction of the second bending surface (24).

Technical Field

The invention relates to the technical field of fan impellers, in particular to a ternary impeller blade structure for improving air intake.

Background

The three-dimensional flow design technology is characterized in that a three-dimensional space inside an impeller is infinitely divided according to a three-dimensional flow theory, a complete and real mathematical model of fluid flow in the impeller is established through analysis of all working points in an impeller flow channel, and grid division and flow field calculation are carried out. The three-dimensional flow design method is used for optimizing factors such as the inlet and outlet placement angle of the blades, the number of the blades, the shape of each section of the twisted blades and the like, and the structure of the three-dimensional flow design method can adapt to the real flow state of fluid, so that the flow separation of the working surface of the blades is avoided, the flow loss is reduced, the speed distribution of all fluid particles in the pump body can be controlled, the optimal flow state in the pump body is obtained, and the fluid conveying efficiency is guaranteed to be optimal.

Centrifugal fan can adsorb the fluid at fast-speed rotatory in-process and flow, but current centrifugal fan intake is limited, when needs improve the intake, mostly just can improve the intake through the blade of changing different specifications or increase output, operates extremely inconvenient, but also reduces centrifugal fan's life easily.

Disclosure of Invention

Aiming at the defects of the prior art, the invention provides a ternary impeller blade structure for improving the air intake.

The invention solves the technical problems through the following technical means:

the ternary impeller blade structure for improving the air intake comprises blades, wherein the blades are formed on a wheel disc and are distributed in an annular mode, a shaft hole is formed between the blades, a sharp corner is arranged at the air inlet of each blade, and the sharp corner is arranged in an inclined mode to take the rotation direction of the ternary impeller as the standard.

The utility model provides an improve ternary impeller blade structure of intake, includes the blade, the blade shaping is on the rim plate and the annular distribution, is provided with the shaft hole between the blade, the air intake department of blade is provided with the end face groove, and the end face groove along the annular distribution in shaft hole, the end face groove is cut into to the blade in along the axial.

As an improvement of the technical scheme, the blade comprises a first bending surface and a second bending surface, the sharp angle comprises a smooth surface, the smooth surface is formed by cutting, an included angle alpha is arranged between the smooth surface and a horizontal line, the alpha is 0-30 degrees, and the smooth surface is always arranged on the first bending surface.

As the improvement of the technical scheme, the top end part of the sharp corner is provided with a fillet, the radius of the fillet is 0.5mm, and the fillet is always arranged close to the direction of the second bending surface.

The invention has the beneficial effects that: according to the structure of the ternary impeller with the sharp corners and the end surface grooves, disclosed by the invention, the air inlet flow of the ternary impeller can be further improved on the blades without the sharp corners and the end surface grooves (the included angle alpha of the sharp corners is 17 degrees, the distance beta formed after the end surface grooves are cut in is 5mm, and the depth gamma formed after the end surface grooves are 4mm), and experiments show that the structure of the ternary impeller with the sharp corners and the end surface grooves can lead a large amount of air into the air outlet from the air inlet, so that the smoothness of air circulation is improved; through different comparison tests, the included angle alpha of the sharp corner is not any angle, the distance beta formed after the end surface groove is cut into is any length, the depth gamma formed after the end surface groove is cut into is any depth, the air intake can be improved, and the air intake can be effectively improved only when the characteristics recorded in the embodiment are met.

Drawings

FIG. 1 is a schematic perspective view of a three-element impeller blade according to an embodiment of the present invention;

FIG. 2 is a top view of a wheel disc according to an embodiment of the present invention;

FIG. 3 is a schematic cross-sectional view taken along line A-A of FIG. 2 according to an embodiment of the present invention;

FIG. 4 is an enlarged schematic view of a portion C in FIG. 3 according to an embodiment of the present invention;

FIG. 5 is a schematic cross-sectional view taken along line B-B of FIG. 2 according to an embodiment of the present invention;

fig. 6 is a schematic cross-sectional structure diagram of a ternary impeller blade according to an embodiment of the present invention.

In the figure: 10. a wheel disc; 20. a blade; 21. sharp corners; 211. a smooth surface; 212. round corners; 22. an end face groove; 23. a first curved surface; 24. a second curved surface; 30. and the shaft hole.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present.

Example 1

As shown in fig. 1, fig. 2, fig. 3, fig. 4, fig. 5 and fig. 6, the ternary impeller blade structure for increasing the intake air of the present embodiment includes blades 20, the blades 20 are formed on a wheel disc 10 and distributed annularly, a shaft hole 30 is disposed between the blades 20, a sharp corner 21 is disposed at an air inlet of the blade 20, and the sharp corner 21 is disposed obliquely with respect to the rotation direction of the ternary impeller.

The utility model provides an improve ternary impeller blade structure of intake, includes blade 20, blade 20 shaping is on rim plate 10 and cyclic annular distributes, is provided with shaft hole 30 between the blade 20, the air intake department of blade 20 is provided with end face slot 22, and end face slot 22 distributes along shaft hole 30 cyclic annular, end face slot 22 cuts into to blade 20 along the axial.

Blade 20 sets up quantity and is eight in this embodiment, and blade 20 and rim plate 10 structure as an organic whole, and blade 20 is the air intake towards the mouth of pipe of shaft hole 30, and blade 20 is the square mouth towards 10 direction departments of rim plate, the 20 diameter 108mm of blade of air intake, the rim plate 10 diameter 200mm of air outlet, impeller gross thickness 65mm, blade 20 curved surface arc length 50mm, blade 20 curved surface radius R50 mm.

The key point of the embodiment is that the sharp corner 21 and the end surface groove 22 are formed, the air inlet amount can be increased by independently arranging one group of the sharp corner 21 and the end surface groove 22, and the air inlet amount is optimally increased by arranging the sharp corner 21 and the end surface groove 22 at the same time.

The end surface groove 22 is cut into 4mm in depth, and the end surface groove 22 is cut into the blade 20 so that the blade 20 is spaced 5mm from the shaft hole 30.

As shown in fig. 1, 3 and 4, the blade 20 includes a first curved surface 23 and a second curved surface 24, the sharp corner 21 includes a smooth surface 211, the smooth surface 211 is cut, an included angle α is formed between the smooth surface 211 and the horizontal line, α is 0 ° to 30 °, and the smooth surface 211 is always disposed on the first curved surface 23.

α is preferably 17 °.

The top end of the sharp corner 21 is provided with a fillet 212, the radius of the fillet 212 is 0.5mm, and the fillet 212 is always arranged close to the second bending surface 24.

Examples 2 to 5

Based on the structure of the ternary impeller described in example 1, the following performance tests were performed, including a test impeller, a first comparative impeller, a second comparative impeller, and a third comparative impeller.

The test impeller, the comparison impeller I, the comparison impeller II and the comparison impeller III are as follows: the diameter of the blade 20 of the air inlet is 108mm, the diameter of the wheel disc 10 of the air outlet is 200mm, the total thickness of the impeller is 65mm, the arc length of the curved surface of the blade 20 is 50mm, and the radius of the curved surface of the blade 20 is R50 mm.

Testing the impeller: having a sharp corner 21 and an end surface groove 22, the sharp corner 21 preferably having an angle α of 17 °, the end surface groove 22 being cut into 4mm deep, the end surface groove 22 being cut into the blade 20 such that the blade 20 is 5mm from the shaft hole 30.

Comparing the impeller I: the sharp corner 21 is not provided and the end surface groove 22 is not provided.

Comparing the impeller II: instead of the sharp corners 21, end grooves 22 are provided.

Comparing the impeller III: the sharp corner 21 is provided and the end surface groove 22 is not provided.

And in the test process, the test impeller, the comparison impeller I, the comparison impeller II and the comparison impeller III are controlled to have the same rotating speed (the positive and negative deviation does not exceed 5 percent), and the test is carried out under the condition of keeping the same air volume.

Table 1 shows the test parameters and performance data of 2-5.

Examples 6 to 10

Based on the structure of the triple impeller described in example 1, performance tests were performed on the triple impeller using only the test impeller, but in the different examples, the end surface grooves 22 of the test impeller were cut at different depths, and no sharp corner 21 was provided.

The specification of the testing impeller is as follows: the diameter of the blade 20 of the air inlet is 108mm, the diameter of the wheel disc 10 of the air outlet is 200mm, the total thickness of the impeller is 65mm, the arc length of the curved surface of the blade 20 is 50mm, and the radius of the curved surface of the blade 20 is R50 mm.

The end surface groove 22 is cut into the blade 20 so that a gap β is formed between the blade 20 and the shaft hole 30, and the gap β is a constant value of 5 mm.

And in the testing process, the rotating speeds of the tested impellers are controlled to be the same (the positive deviation and the negative deviation are not more than 5%), and the testing is carried out under the environment of the same air volume.

Table 2 shows test parameters and performance data of 6-10.

Item	Rotating speed (r/min)	Depth of cut (mm)	Flow rate (m)3/h)
				Example 6	16000	1	2460
Example 7	16000	2	2470
				Example 8	16000	3	2488
Example 9	16000	4	2508
				Example 10	16000	5	2480

Examples 11 to 15

Based on the structure of the ternary impeller described in example 1, a performance test was performed on the ternary impeller using only the test impeller, but in the different examples, the end surface grooves 22 of the test impeller were different in pitch β after cutting, and no sharp corner 21 was provided.

The specification of the testing impeller is as follows: the diameter of the blade 20 of the air inlet is 108mm, the diameter of the wheel disc 10 of the air outlet is 200mm, the total thickness of the impeller is 65mm, the arc length of the curved surface of the blade 20 is 50mm, and the radius of the curved surface of the blade 20 is R50 mm.

The end surface groove 22 is cut into the blade 20 to a depth γ of a constant value of 4mm, wherein the test pitch β is the pitch between the blade 20 and the shaft hole 30.

And in the testing process, the rotating speeds of the tested impellers are controlled to be the same (the positive deviation and the negative deviation are not more than 5%), and the testing is carried out under the environment of the same air volume.

Table 3 shows the test parameters and performance data from 11 to 15.

Item	Rotating speed (r/min)	Spacing beta (mm)	Flow rate (m)3/h)
				Example 11	16000	2	2462
Example 12	16000	3	2474
				Example 13	16000	4	2480
Example 14	16000	5	2508
				Example 15	16000	6	2488

Examples 16 to 21

Based on the structure of the ternary impeller described in example 1, a performance test was performed on the ternary impeller using only the test impeller, but in different examples, the test impellers had different tip angles 21 and different included angles α, and were not provided with the end surface grooves 22.

The specification of the testing impeller is as follows: the diameter of the blade 20 of the air inlet is 108mm, the diameter of the wheel disc 10 of the air outlet is 200mm, the total thickness of the impeller is 65mm, the arc length of the curved surface of the blade 20 is 50mm, and the radius of the curved surface of the blade 20 is R50 mm.

And in the testing process, the rotating speeds of the tested impellers are controlled to be the same (the positive deviation and the negative deviation are not more than 5%), and the testing is carried out under the environment of the same air volume.

Table 4 shows the test parameters and performance data of 16-21.

Item	Rotating speed (r/min)	Included angle alpha (°)	Flow rate (m)3/h)
				Example 16	16000	0	2455
Example 17	16000	10	2472
				Example 18	16000	15	2485
Example 19	16000	17	2500
				Example 20	16000	25	2470
Example 21	16000	30	2458

According to the results of tables 1, 2, 3 and 4, the structure of the ternary impeller with the sharp corners 21 and the end surface grooves 22 (the included angle alpha of the sharp corner 21 is 17 degrees, the distance beta formed after the end surface grooves 22 are cut in is 5mm, and the depth gamma formed after the cut in is 4mm) can further improve the air inlet flow of the ternary impeller on the blade 20 without the sharp corners 21 and the end surface grooves 22, and tests show that the structure of the ternary impeller with the sharp corners 21 and the end surface grooves 22 can lead a large amount of air into the air outlet from the air inlet, so that the air circulation smoothness is improved; through different comparison tests, the included angle alpha of the sharp corner 21 is not any angle, the distance beta formed after the end surface groove 22 is cut into is any length, the depth gamma formed after the cutting into is any depth, the air intake can be improved, and the air intake can be effectively improved when the characteristics recorded in the embodiment are met.

It is noted that, in this document, relational terms such as first and second, and the like, if any, are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.

The above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.