High-efficiency hybrid backward-inclined centrifugal wind wheel

Abstract

The utility model relates to a high-efficiency hybrid backward-inclined centrifugal wind wheel, which comprises a base plate, a wind wheel, a wind wheel, a wind wheel, a wind wheel, a wind wheel, a wind wheel and a wind wheel, and is characterized in that the base plate comprises an annular plate and a central cylinder protruding upwards and inwards along a central hole of the annular plate; the impeller comprises a plurality of blades which are arranged on the annular plate in an annular array; the upper disc is connected to the upper end, away from the bottom disc, of the impeller, the upper disc comprises a convex ring and a wave ring arranged outside the convex ring, the wave ring is formed by a plurality of wave protrusions and wave recesses in an annular array, and an air storage chamber is formed by two adjacent blades, the bottom disc and the upper disc; the wave ring in the same air storage chamber is provided with at least two wave protrusions, the two wave protrusions in the same air storage chamber are arranged in parallel and form an inclined angle A relative to the radial direction, the blades are arranged at an inclined angle B relative to the radial direction, and the difference value of the inclined angle A and the inclined angle B is larger than 0 degree and smaller than 90 degrees.

Description

Technical Field

[0001] The utility model relates to the technical field of centrifugal wind wheels, in particular to a high-efficiency hybrid backward-inclined centrifugal wind wheel. Background Art

[0002] A centrifugal impeller is a device that uses a high-speed rotating impeller to change the direction and pressure of gas. Since the impeller involves kinetic energy conversion, impellers of different designs have different performances. Improving the performance of the impeller has always been the pursuit of technical personnel in this field. Utility Model Content

[0003] In view of the above situation, it is necessary to propose a high-efficiency hybrid backward-inclined centrifugal wind wheel.

[0004] In order to solve the above technical problems, the technical solution adopted by the utility model is: a high-efficiency hybrid backward-inclined centrifugal impeller, comprising:

[0005] A chassis, the chassis comprising a ring plate and a center tube convex upwardly along a center hole of the ring plate;

[0006] An impeller, comprising a plurality of blades arranged in an annular array on the annular plate;

[0007] An upper plate is connected to the upper end of the impeller away from the base plate, the upper plate includes a convex ring and a wave ring arranged outside the convex ring, two adjacent blades form an air storage chamber with the base plate and the upper plate, and the wave ring in the same air storage chamber has at least two wave protrusions, and the two wave protrusions in the same air storage chamber are arranged in parallel and are inclined at an angle A relative to the radial direction, the blades are arranged at an inclined angle B relative to the radial direction, and the difference between the inclination angle A and the inclination angle B is greater than 0 and less than 90 degrees.

[0008] Furthermore, the blades are exposed inwardly from the upper plate in a radial direction, and the upper ends of the blades exposed from the upper plate extend downward in an inclined surface or an arc surface.

[0009] Furthermore, the outer ends of the blades extend perpendicularly to the chassis, the inner ends of the blades extend downwardly in an inclined plane, and the blades extend in an arc shape on the annular plate.

[0010] Furthermore, the outer end of the blade is flush with or exceeds the inner end of another adjacent blade in the circumferential direction.

[0011] Furthermore, the inner diameter of the annular hole of the upper plate is larger than the inner diameter of the upper end of the central tube.

[0012] Furthermore, a plurality of ribs are provided at the connection between the ring plate and the central tube, and the ribs are arranged in a ring array.

[0013] Furthermore, the central tube includes, from bottom to top, a first annular groove, a second annular groove, a third annular groove and a fourth annular groove, the inner diameters of which decrease successively.

[0014] Furthermore, a plurality of wind holes inclined downward are provided at the connection between the third annular groove and the fourth annular groove, and the wind holes are arranged in a ring array.

[0015] Furthermore, the first annular groove is an arc groove, the second annular groove and the third annular groove are oblique grooves, and the fourth annular groove is a cylindrical groove.

[0016] Furthermore, the outer contour of the center tube includes a straight tube portion, a step transition portion, an arc-shaped extension portion and a sloped extension portion in sequence from the upper straight line. The outer diameter of the step transition portion is greater than the outer diameter of the straight tube portion, the outer diameter of the arc-shaped extension portion gradually increases along the step transition portion, and the outer diameter of the sloped extension portion gradually increases along the arc-shaped extension portion.

[0017] The beneficial effects of the utility model are that the annular upper plate extends circumferentially in a continuous wave shape, and there are at least two wave protrusions between two adjacent blades, and the two wave protrusions are parallel to each other and inclined. According to the principles of fluid mechanics and aerodynamics, the air flow velocity of the wind wheel can be increased, thereby improving the energy efficiency of the fan and the wind wheel. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic structural diagram of a high-efficiency hybrid backward-inclined centrifugal wind wheel according to an embodiment of the utility model;

[0019] Figure 2 It is a schematic structural diagram of another direction of a high-efficiency hybrid backward-inclined centrifugal impeller according to an embodiment of the utility model;

[0020] Figure 3 This is a schematic structural diagram of another direction of a high-efficiency hybrid backward-inclined centrifugal impeller according to an embodiment of the utility model;

[0021] Figure 4 This is a schematic structural diagram of another direction of a high-efficiency hybrid backward-inclined centrifugal impeller according to an embodiment of the utility model;

[0022] Figure 5 This is a schematic structural diagram of a central tube of a high-efficiency hybrid backward-inclined centrifugal wind wheel according to an embodiment of the utility model;

[0023] Figure 6 It is a schematic structural diagram of a wave protrusion of a high-efficiency hybrid backward-inclined centrifugal wind wheel according to an embodiment of the utility model;

[0024] Figure 7 It is a structural schematic diagram of the inclination angle A and the inclination angle B of a high-efficiency hybrid backward-inclined centrifugal impeller in an embodiment of the utility model;

[0025] Figure 8 This is a schematic diagram of the structure of blades of a high-efficiency hybrid backward-inclined centrifugal wind wheel according to an embodiment of the utility model;

[0026] Fig. 9 This is a schematic diagram comparing the air volume of a high-efficiency hybrid backward-inclined centrifugal wind wheel in an embodiment of the utility model and existing products.

[0027] Description of labels:

[0028] 100, chassis; 110, ring plate; 120, center tube; 121, first ring groove; 1211, rib plate;

[0029] 122, second annular groove; 123, third annular groove; 1231, air hole; 124, fourth annular groove;

[0030] 125, straight tube portion; 126, step transition portion; 127, arc-shaped extension portion; 128, inclined extension portion;

[0031] 200, impeller; 210, blades; 211, air storage chamber; 300, upper plate; 310, wave ring;

[0032] 311, wave convexity; 3111, wave crest; 312, wave concavity; 3121, wave trough;

[0033] 313. Smooth recessed portion; 320. Protruding ring. DETAILED DESCRIPTION

[0034] In order to make the purpose, technical solution and advantages of the utility model more clear, the following is a further detailed description of a high-efficiency hybrid backward-inclined centrifugal impeller of the utility model in combination with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model, and are not used to limit the utility model.

[0035] Please refer to Figure 1-Figure 9 , a high-efficiency hybrid backward-inclined centrifugal impeller, comprising:

[0036] The chassis 100 includes a ring plate 110 and a center tube 120 that protrudes upward along a center hole of the ring plate 110;

[0037] The impeller 200 includes a plurality of blades 210 arranged in an annular array on the ring plate 110;

[0038] The upper plate 300 is connected to the upper end of the impeller 200 away from the bottom plate 100. The upper plate 300 includes a convex ring 320 and a wave ring 310 arranged outside the convex ring 320. The wave ring 310 is formed by a circular array of a plurality of wave protrusions 311 and wave depressions 312. Two adjacent blades 210 form an air storage chamber 211 with the bottom plate 100 and the upper plate 300, and the wave ring 310 in the same air storage chamber 211 has at least two wave protrusions 311, and the two wave protrusions 311 in the same air storage chamber 211 are arranged in parallel and are inclined at an angle A relative to the radial direction. The blades 210 are arranged at an inclined angle B relative to the radial direction, and the difference between the inclination angle A and the inclination angle B is greater than 0 and less than 90 degrees.

[0039] The annular upper plate 300 extends circumferentially in a continuous wave shape, and has at least two wave protrusions 311 between two adjacent blades 210. The two wave protrusions 311 are parallel to each other and inclined. According to the principles of fluid mechanics and aerodynamics, the air flow velocity of the wind wheel can be increased, thereby improving the energy efficiency of the fan and the wind wheel.

[0040] Please refer to Figure 1 and Figure 7 The blade 210 is exposed from the upper plate 300 inwardly in the radial direction, and the upper end of the blade 210 exposed from the upper plate 300 extends downward in an inclined surface or an arc surface. The upper end of the blade 210 extends downward in an inclined surface or an arc surface, and the peak is cut off, which is smoother, and the sound waves generated are also smoother, the sound frequency and power are reduced, and the noise is reduced.

[0041] Please refer to Figure 1 and Figure 5 The outer end of the blade 210 extends perpendicularly to the chassis 100, the inner end of the blade 210 extends downwardly in an inclined plane, and the blade 210 extends in an arc shape on the ring plate 110. The capacity of a single air storage chamber 211 is increased, the wind surface of the blade 210 is increased, the air volume is increased, and a vortex wind flow is formed, thereby increasing efficiency. In particular, the outer end of the blade 210 is flush with the outer end of the ring plate 110, and the inner end of the blade 210 abuts against the central tube 120, and in particular, the inner end of the blade 210 abuts against the inclined extension portion 128.

[0042] Please refer to Figure 8 The outer end of the blade 210 is flush with or exceeds the inner end of another adjacent blade 210 in the circumferential direction. The pressure is increased, pressure leakage is avoided, and the air volume is increased. It can be understood that the flush and exceed are judged by the radial extension line.

[0043] Please refer to Figure 1 and Figure 7The inner diameter of the annular hole of the upper plate 300 is larger than the inner diameter of the upper end of the central tube 120. That is, the inner diameter of the convex ring 320 is larger than the inner diameter of the straight tube portion 125. The upper plate 300 is large and the base plate 100 is small, and the impeller 200 is optimized in the middle, so that the wind wheel can generate a mixed flow vortex wind flow, increase pressure, increase wind volume, and reduce noise.

[0044] Please refer to Figure 3-Figure 5 A plurality of ribs 1211 are provided at the connection between the ring plate 110 and the central tube 120, and the ribs 1211 are arranged in a ring array. The arrangement of the ribs 1211 can strengthen the connection, ensure the extension of the life of the wind wheel, and reduce vibration. On the other hand, the ribs 1211 can generate downward wind flow, so that the lower part of the motor can achieve heat dissipation effect, reduce the motor temperature, and increase the life of the motor. In particular, the ribs 1211 are arranged radially.

[0045] Please refer to Figure 3 and Figure 5 The center tube 120 includes, from bottom to top, a first annular groove 121, a second annular groove 122, a third annular groove 123, and a fourth annular groove 124, whose inner diameters decrease successively. The stepped annular grooves of the center tube 120 adopt the closing technology, and can be connected to the motor through the steel flange and plastic die-casting joint molding technology, so that the connection with the motor is more firm.

[0046] Please refer to Figure 1 , Figure 3 and Figure 5 A plurality of downwardly inclined air holes 1231 are provided at the connection between the third annular groove 123 and the fourth annular groove 124, and the air holes 1231 are arranged in a circular array. The air holes 1231 are arranged so that the motor can obtain the airflow flowing downward from the middle to help the motor dissipate heat and reduce the temperature of the motor. At the same time, the air holes 1231 discharge flow to reduce the vibration of the wind wheel, reduce noise, and help the steel ring improve toughness and extend service life.

[0047] Please refer to Figure 5 The first annular groove 121 is an arc groove, the second annular groove 122 and the third annular groove 123 are oblique grooves, and the fourth annular groove 124 is a cylindrical groove. In particular, the inclination of the second annular groove 122 is smaller than the inclination of the fourth annular groove 124.

[0048] Please refer to Figure 5The outer contour of the center tube 120 includes a straight tube portion 125, a step transition portion 126, an arc-shaped extension portion 127 and an inclined surface extension portion 128 in sequence from the upper straight line. The outer diameter of the step transition portion 126 is greater than the outer diameter of the straight tube portion 125. The outer diameter of the arc-shaped extension portion 127 gradually increases along the step transition portion 126, and the outer diameter of the inclined surface extension portion 128 gradually increases along the arc-shaped extension portion 127. While increasing the proportion of the blades 210, the wind noise is reduced. In particular, the fourth annular groove 124 is formed in the straight tube portion 125, the third annular groove 123 forms the step transition portion 126, and the second annular groove 122 and the first annular groove 121 are formed in the arc-shaped extension portion 127 and the inclined surface extension portion 128.

[0049] In particular, each wave protrusion 311 or wave depression 312 on the wave ring 310 gradually increases in width from the inside to the outside, thereby better increasing the wind volume. It can be understood that the wave protrusion 311 forms a wave crest 3111, and the wave depression 312 forms a wave trough 3121.

[0050] Please refer to Figure 1 and Figure 6 There are two wave protrusions 311 in the same air storage chamber 211, the two wave protrusions 311 form a wave crest 3111, there is a wave depression 312 between the two wave protrusions 311, the wave depression 312 forms a wave valley 3121, the position where the blade 210 is supported is a smooth depression 313, the width of the smooth depression 313 is greater than the width of the wave valley 3121, and the depression low point of the smooth depression 313 is lower than the low point of the wave valley 3121.

[0051] It can be understood that the difference between the inclination angle A and the inclination angle B is greater than 0 and less than 90 degrees, that is, when the blade 210 is inclined clockwise, the wave protrusion 311 or the wave depression 312 is also inclined clockwise, and when the blade 210 is inclined counterclockwise, the wave protrusion 311 or the wave depression 312 is also inclined counterclockwise. The difference between the inclination angle A and the inclination angle B is greater than 0, so that mixed vortex wind flows in different directions can be generated, the air volume is increased, and the noise is reduced. In particular, the difference between the inclination angle A and the inclination angle B is preferably 5-35 degrees.

[0052] The following table shows the test results of the utility model and the comparative example under the same equipment and the same conditions. It can be clearly seen that the air volume, pressure and wind speed of the utility model are significantly improved, and the noise and temperature rise are significantly reduced.

[0053]

[0054] Compared with the common centrifugal wind wheel

[0055] Please refer to Fig. 9, is the air volume performance of the utility model and the ordinary centrifugal wind wheel at different pressures at a frequency of 50 Hz. It can be seen that the utility model has a significant improvement in air volume and improves the efficiency of the wind wheel.

[0056] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back...), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0057] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the utility model, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of the features.

[0058] In summary, the utility model provides a high-efficiency hybrid backward-inclined centrifugal impeller, which improves efficiency and reduces noise through a unique upper plate design; the unique rib plate design and air hole design reduce the temperature of the motor and improve the heat dissipation of the motor, thereby improving the overall performance; the blade design combined with the wave ring increases the space of the air storage chamber and reduces noise.

[0059] The above description is only a preferred embodiment of the present invention and does not constitute any form of limitation to the present invention. Although the present invention has been disclosed as a preferred embodiment as above, it is not intended to limit the present invention. Any technician familiar with the profession can make some changes or modify the technical contents disclosed above into equivalent embodiments without departing from the scope of the technical solution of the present invention. However, any simple modification, equivalent change and modification made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention still fall within the scope of the technical solution of the present invention.

Claims

1. A high-efficiency hybrid backward-inclined centrifugal impeller, characterized in that: include: A chassis, the chassis comprising a ring plate and a center tube convex upwardly along a center hole of the ring plate; An impeller, comprising a plurality of blades arranged in an annular array on the annular plate; An upper plate is connected to the upper end of the impeller away from the base plate, the upper plate includes a convex ring and a wave ring arranged outside the convex ring, two adjacent blades form an air storage chamber with the base plate and the upper plate, and the wave ring in the same air storage chamber has at least two wave protrusions, and the two wave protrusions in the same air storage chamber are arranged in parallel and are inclined at an angle A relative to the radial direction, the blades are arranged at an inclined angle B relative to the radial direction, and the difference between the inclination angle A and the inclination angle B is greater than 0 and less than 90 degrees.

2. A high-efficiency hybrid backward-inclined centrifugal impeller according to claim 1, characterized in that: The blades are exposed inwardly from the upper plate along the radial direction, and the upper ends of the blades exposed from the upper plate extend downward in an inclined surface or an arc surface.

3. A high-efficiency hybrid backward-inclined centrifugal impeller according to claim 1 or 2, characterized in that: The outer ends of the blades extend perpendicularly to the chassis, the inner ends of the blades extend downwardly in an inclined plane, and the blades extend in an arc shape on the annular plate.

4. The high-efficiency hybrid backward-inclined centrifugal impeller according to claim 3, characterized in that: The outer end of the blade is flush with or exceeds the inner end of another adjacent blade in the circumferential direction.

5. The high-efficiency hybrid backward-inclined centrifugal impeller according to claim 2, characterized in that: The inner diameter of the annular hole of the upper plate is larger than the inner diameter of the upper end of the central tube.

6. The high-efficiency hybrid backward-inclined centrifugal impeller according to claim 1, characterized in that: A plurality of ribs are provided at the connection between the ring plate and the central tube, and the ribs are arranged in a ring array.

7. The high-efficiency hybrid backward-inclined centrifugal impeller according to claim 1, characterized in that: The central tube includes, from bottom to top, a first annular groove, a second annular groove, a third annular groove and a fourth annular groove, the inner diameters of which decrease successively.

8. The high-efficiency hybrid backward-inclined centrifugal impeller according to claim 7, characterized in that: A plurality of downwardly inclined air holes are provided at the connection between the third annular groove and the fourth annular groove, and the air holes are arranged in a ring array.

9. The high-efficiency hybrid backward-inclined centrifugal impeller according to claim 7, characterized in that: The first annular groove is an arc groove, the second annular groove and the third annular groove are oblique grooves, and the fourth annular groove is a cylindrical groove.

10. The high-efficiency hybrid backward-inclined centrifugal impeller according to claim 1, characterized in that: The outer contour of the center tube includes a straight tube portion, a step transition portion, an arc-shaped extension portion and a slope extension portion in sequence from the upper straight line. The outer diameter of the step transition portion is larger than the outer diameter of the straight tube portion. The outer diameter of the arc-shaped extension portion gradually increases along the step transition portion, and the outer diameter of the slope extension portion gradually increases along the arc-shaped extension portion.

Images