High-speed magnetic suspension rotor impeller

Abstract

The utility model belongs to the technical field of magnetic suspension rotors, and discloses a high-speed magnetic suspension rotor impeller which comprises a hub mounted on a rotor, a plurality of blades are arranged on the curved wheel surface of the hub, the blades are annularly and uniformly distributed around the axis of the hub at equal intervals, a de-weighting groove for reducing weight is formed in the wheel back of the hub, and a plurality of magnetic suspension rotor blades are arranged on the de-weighting groove. The de-weight groove is annularly formed and is coaxial with the hub, a shaft sleeve column is formed in the center of the interior of the de-weight groove, and a plurality of reinforcing ribs are jointly installed between the peripheral wall of the shaft sleeve column and the inner wall of the de-weight groove; the critical rotating speed of the rotor is increased by reducing the weight of the impeller at the position of the shaft head, the rigidity of the impeller is improved, and the axial deformation of the impeller is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of magnetic suspension rotor, especially to a high -speed magnetic suspension rotor impeller. BACKGROUND

[0002] With the progress of society, the demand for energy is increasing, energy anxiety is increasingly apparent, so whether in industrial production or in daily life, efficient permanent magnet synchronous motor is increasingly widely used, and the magnetic suspension motor rotor develops towards high speed and high pressure.

[0003] In the patent application No. 202211564599.2 Chinese invention patent, a kind of magnetic suspension motor is proposed, the rotor in this patent needs to have high critical speed if it is to realize high speed stable operation, and there are many means to improve critical speed, among which increasing rotor diameter is the most commonly used method, but the increase of rotor mass will cause the problems of poor running stability, increased material cost, etc. UTILITY MODEL CONTENTS

[0004] The main technical problem to be solved by the utility model is to provide a high-speed magnetic suspension rotor impeller, which reduces the weight of the impeller at the shaft head position to improve the critical speed of the rotor and achieve the improvement of the rigidity of the impeller and the reduction of the axial deformation.

[0005] To solve the above technical problems, the utility model provides the following technical scheme:

[0006] A high-speed magnetic suspension rotor impeller is installed on a hub on the rotor, the curved wheel surface of the hub has a plurality of blades, the blades are uniformly arranged around the axis of the hub in a ring shape, the back of the hub is provided with a weight-removing groove for weight reduction, the weight-removing groove is arranged in a ring shape and coaxially arranged with the hub, a shaft sleeve column is formed at the center position inside the weight-removing groove, and a plurality of reinforcing ribs are installed between the outer peripheral wall of the shaft sleeve column and the inner wall of the weight-removing groove.

[0007] The utility model further optimizes the above technical scheme as follows:

[0008] A flow baffle is installed between the outer peripheral wall of the shaft sleeve column and the inner wall of the weight-removing groove, and the flow baffle is used to isolate the inside of the weight-removing groove from the outside.

[0009] Further optimization: the flow baffle is installed in the weight-removing groove by interference fit.

[0010] Further optimization: the outer peripheral wall of the flow baffle is pressed against the inner wall of the weight-removing groove, the inner peripheral wall of the flow baffle is fixed with a baffle edge, and the baffle edge is pressed against the outer peripheral wall of the shaft sleeve column.

[0011] Further optimization: the reinforcing ribs are uniformly arranged around the axis of the weight-removing groove in a ring shape.

[0012] Further optimization: the number of the blades is n times of the number of the reinforcing ribs.

[0013] Further optimization: the number of the reinforcing ribs is greater than or equal to 4.

[0014] Further optimization: the reinforcing ribs are arranged in an inclined manner between the extending direction and the radial direction of the hub.

[0015] Further optimization: the rotation direction of the reinforcing ribs is consistent with the rotation direction of the blades.

[0016] Further optimization: the angle between the center position of the outer end of the reinforcing rib and the radial direction of the shaft sleeve column is a1, and the angle between the center position of the inner end of the adjacent reinforcing rib close to the side of the inclined direction of the reinforcing rib and the radial direction of the shaft sleeve column is a2, and a2 < a1.

[0017] The utility model discloses the above-mentioned technical scheme has the following beneficial effects:

[0018] 1, the utility model discloses the above-mentioned technical scheme, clever design, reasonable in structure, through setting up the weight-removing groove on the back of the hub to realize the weight reduction of the impeller, thereby realized the promotion of the critical speed of the rotor.

[0019] 2, the reinforcing rib is arranged in the weight-removing groove, and the rigidity of resisting axial deformation is reserved while the weight is increased, thereby the axial deformation of the impeller caused by the weight reduction is reduced.

[0020] 3, the baffle is arranged at the opening of the weight-removing groove to isolate the external flow field, and the influence of the vortex caused by the reinforcing rib on the running stability of the rotor is excluded, thereby the running stability of the impeller in the high-speed rotation process is improved, and the phenomenon that the back flow field is unstable caused by the weight reduction is avoided. DRAWINGS

[0021] In order to more clearly illustrate the technical scheme in the embodiment of the utility model or prior art, the following will briefly introduce the drawings needed to be used in the embodiment or prior art description, and obviously, the drawings in the following description are only some embodiments of the utility model, and for the ordinary skilled in the art, other drawings can also be obtained according to these drawings without the creative labor.

[0022] Figure 1 It is the installation schematic diagram of the impeller in the prior art;

[0023] Figure 2 It is the schematic diagram of the overall structure in the embodiment of the utility model;

[0024] Figure 3 It is Figure 2 the sectional view schematic diagram of A-A direction in the embodiment of the utility model;

[0025] Figure 4 For Figure 2 The cross-sectional view of the B-B direction is shown schematically.

[0026] Figure 5 For the structure of the back of the impeller in the embodiment of the utility model is shown schematically.

[0027] Figure 6 For Figure 5 The main view is shown schematically.

[0028] In the figure: 1, hub; 2, blade; 3, weight-removing groove; 4, shaft sleeve column; 5, reinforcing rib; 6, flow baffle; 61, baffle. DETAILED DESCRIPTION

[0029] The technical scheme in the embodiments of the utility model will be described clearly and completely below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model.

[0030] As Figures 2-6 Commonly shown, a high-speed magnetic suspension rotor impeller, installed on the hub 1 of the rotor, the curved wheel surface of the hub 1 has several pieces of blades 2, and the blades 2 are uniformly distributed around the axis of the hub 1 in a ring shape.

[0031] In the present embodiment, the shape, extension direction and spacing of the blades 2 and other dimensional data all constitute prior art and are well known to those skilled in the art, and will not be described here.

[0032] And the structure, size and mounting principle structure of the hub 1 on the rotor all constitute prior art and are well known to those skilled in the art, and will not be described here.

[0033] As Figures 3-6 Commonly shown, the hub 1 is provided with a weight-removing groove 3 for weight reduction, the weight-removing groove 3 is arranged in a ring shape and coaxially arranged with the hub 1, a shaft sleeve column 4 is formed at the center position inside the weight-removing groove 3, and a plurality of reinforcing ribs 5 are jointly installed between the outer peripheral wall of the shaft sleeve column 4 and the inner wall of the weight-removing groove 3.

[0034] As Figure 1 The structure of the impeller in the prior art shown in the figure, by reducing the weight of the impeller at the shaft head position, the critical speed of the rotor is improved, but the weight reduction leads to poor rigidity of the impeller, and the axial deformation increases, when the axial deformation of the impeller exceeds the blade front gap, friction will occur during the rotation of the impeller, resulting in unstable operation.

[0035] In the embodiment, the weight-reducing groove 3 is arranged to reduce the weight of the impeller, and the critical speed of the rotor is improved.

[0036] The reinforcing rib 5 is additionally arranged in the weight-reducing groove 3, the rigidity of the impeller is improved, the axial deformation is reduced, and the impeller meets the use condition.

[0037] As shown in Figure 3 The flow baffle 6 is arranged between the outer peripheral wall of the shaft sleeve column 4 and the inner wall of the weight-reducing groove 3, and the flow baffle 6 is used to isolate the inside of the weight-reducing groove 3 from the outside.

[0038] In the embodiment, the flow baffle 6 isolates the flow field of the outside, and the influence of the vortex generated by the reinforcing rib 5 arranged in the weight-reducing groove 3 on the stability of the rotor is excluded, so that the stability of the impeller is improved, and the phenomenon that the flow field of the back of the impeller is unstable due to the weight reduction is avoided.

[0039] The flow baffle 6 is arranged in the weight-reducing groove 3 in the form of interference fit.

[0040] The outer peripheral wall of the flow baffle 6 is pressed against the inner wall of the weight-reducing groove 3, the inner peripheral wall of the flow baffle 6 is fixed with the baffle edge 61, and the baffle edge 61 is pressed against the outer peripheral wall of the shaft sleeve column 4.

[0041] In the embodiment, the material of the flow baffle 6 is consistent with the material of the impeller.

[0042] As shown in Figure 5 and Figure 6 The reinforcing rib 5 is arranged in the form of ring around the axis of the weight-reducing groove 3.

[0043] The number of the reinforcing rib 5 is n times of the number of the blade 2, that is, the number of the reinforcing rib 5 can be divided by the number of the blade 2.

[0044] The number of the reinforcing rib 5 is greater than or equal to 4.

[0045] The extending direction of the reinforcing rib 5 is inclined at a certain angle with the radial direction of the hub 1.

[0046] The rotation direction of the reinforcing rib 5 is consistent with the rotation direction of the blade 2.

[0047] In the embodiment, the thickness of the reinforcing rib 5 is related to the deformation of the impeller, so that the axial deformation of the impeller in the actual application can be judged.

[0048] As shown in Figure 6As shown in the figure, the angle between the center position of the outer end of the reinforcing rib 5 and the radial direction of the shaft sleeve column 4 is a1, and the angle between the center position of the inner end of the adjacent reinforcing rib 5 close to the side of the reinforcing rib 5 in the inclined direction and the radial direction of the shaft sleeve column 4 is a2, a2

[0049] Although the embodiments of the present application have been shown and described, it is to be understood that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present application, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A high-speed magnetic levitation rotor impeller, a wheel hub (1) is installed on a rotor, a plurality of blades (2) are arranged on the curved wheel surface of the wheel hub (1), the blades (2) are uniformly arranged at equal intervals in a ring shape around the axis of the wheel hub (1), characterized in that, The wheel back of the hub (1) is provided with a weight-removing groove (3) for weight reduction, the weight-removing groove (3) is arranged in a ring shape and coaxially with the hub (1), a shaft sleeve column (4) is formed at the center position inside the weight-removing groove (3), and a plurality of reinforcing ribs (5) are jointly arranged between the outer peripheral wall of the shaft sleeve column (4) and the inner wall of the weight-removing groove (3).

2. The high speed magnetic levitation rotor impeller of claim 1, wherein, The outer peripheral wall of the shaft sleeve column (4) and the inner wall of the weight-removing groove (3) are provided with a flow baffle (6), and the flow baffle (6) is used to isolate the inside of the weight-removing groove (3) from the outside.

3. The high speed magnetic levitation rotor impeller of claim 2, wherein, The flow baffle (6) is installed in the weight-removing groove (3) by interference fit.

4. The high speed magnetic levitation rotor impeller of claim 3, wherein, The outer peripheral wall of the flow baffle (6) is pressed against the inner wall of the weight-removing groove (3), the inner peripheral wall of the flow baffle (6) is fixed with a baffle edge (61), and the baffle edge (61) is pressed against the outer peripheral wall of the shaft sleeve column (4).

5. The high speed magnetic levitation rotor impeller of claim 1, wherein, The reinforcing ribs (5) are arranged in a ring shape at equal intervals around the axis of the weight-removing groove (3).

6. The high speed magnetic levitation rotor impeller of claim 5, wherein, The number of the blades (2) is n times the number of the reinforcing ribs (5).

7. The high speed magnetic levitation rotor impeller of claim 6, wherein, The number of the reinforcing ribs (5) is greater than or equal to 4.

8. The high speed magnetic levitation rotor impeller of claim 5, wherein, The extending direction of the reinforcing ribs (5) is inclined to the radial direction of the hub (1).

9. The high speed magnetic levitation rotor impeller of claim 8, wherein, The rotation direction of the reinforcing ribs (5) is consistent with the rotation direction of the blades (2).

10. The high speed magnetic levitation rotor impeller of claim 8, wherein, The included angle between the center position of the outer end of the reinforcing rib (5) and the radial direction of the shaft sleeve column (4) is a1, and the included angle between the center position of the inner end of the adjacent reinforcing rib (5) close to the inclined direction side of the reinforcing rib (5) and the radial direction of the shaft sleeve column (4) is a2, and a2 < a1.

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