An impeller assembly

Abstract

The utility model relates to the field of impeller, especially impeller assembly. Including impeller body, axle sleeve and rivet, the impeller body and axle sleeve are connected through rivet, the axle sleeve is opened with through -hole along rotation axis, the through -hole is used for connecting the output end of driving device, makes driving device can drive impeller body rotates around rotation axis, be provided with damping ring between the impeller body and axle sleeve, the rivet penetrates impeller body, damping ring and axle sleeve along the axial sequence, and make the damping ring pressure joint between impeller body and axle sleeve. The damping ring of engineering plastics material is arranged between the metal impeller body and axle sleeve in the application, can effectively absorb and isolate the high frequency vibration generated by high -speed rotation, avoids the direct collision and friction between metal parts, significantly reduces the noise and vibration level when the equipment runs, improves product quality.

Description

Technical Field

[0001] This utility model relates to the field of impellers, and more particularly to an impeller assembly. Background Technology

[0002] In the field of fluid machinery such as fans and pumps, the impeller assembly is the core working component. A traditional impeller assembly typically consists of a metal impeller body and a bushing, which are usually rigidly connected coaxially by rivets or other rivets. The bushing is used to connect to an external drive unit (such as a motor output shaft) to transmit torque.

[0003] However, the above-mentioned technologies have at least the following technical problems: If the rivet head is formed directly on the end face of the thin-walled impeller body, the enormous riveting force can easily cause plastic deformation or even cracking of the impeller body. This not only seriously affects the product yield but also leads to insufficient structural integrity and reliability of the impeller under high-speed operation.

[0004] Furthermore, the impeller body and the bushing, both being metal structures, produce abnormal noises due to the collision vibrations caused by rotation. Utility Model Content

[0005] The purpose of this invention is to provide an impeller assembly to solve the problems existing in the prior art.

[0006] The technical solution of this utility model is: an impeller assembly, including an impeller body, a bushing, and rivets; The impeller body and the bushing are connected by rivets. The bushing has a through hole along the rotation axis. The through hole is used to connect to the output end of the drive device, so that the drive device can drive the impeller body to rotate around the rotation axis. The rivet passes through the impeller body and the bushing sequentially from the end of the impeller body away from the bushing, such that the head of the rivet abuts against the end of the impeller body away from the bushing, and the rivet head is formed at the end of the bushing.

[0007] Preferably, the rivets are arranged in multiples around the axis of rotation.

[0008] Preferably, a damping ring is provided between the impeller body and the bushing; the rivet passes through the impeller body, the damping ring and the bushing in sequence along the axial direction, so that the damping ring is pressed between the impeller body and the bushing.

[0009] Preferably, the bushing includes a central sleeve, the through hole is opened along the axis of the central sleeve, the outer wall of the central sleeve is provided with a mounting plate radially, the rivet is provided through the mounting plate, and the damping ring is sleeved on the central sleeve and abuts against the end face of the mounting plate.

[0010] Preferably, the damping ring is configured as a multi-layer structure, including at least a first layer plate and a second layer plate, and is provided with a support portion to connect the first layer plate and the second layer plate, such that the planes on which the first layer plate and the second layer plate are located are parallel and form a gap.

[0011] Preferably, the support portions are evenly arranged in multiple positions around the rotation axis, and any support portion is set as a sheet structure. The multiple support portions are arranged in a vortex shape, so that multiple cavities with a central sleeve are formed between the first layer plate and the second layer plate.

[0012] Preferably, the damping ring is made of engineering plastic using an integral molding process.

[0013] Preferably, both the mounting plate and the end face of the impeller body that abuts against the damping ring are coated with adhesive and are bonded and fixed to the damping ring.

[0014] Preferably, the impeller body includes an upper impeller, a middle impeller, and a lower impeller, and the rivet passes through the lower impeller to fix the damping ring and the bushing.

[0015] Compared with the prior art, the advantages of this utility model are: (1) In this application, the rivet passes through the end of the impeller body away from the bushing and the riveting head is formed at the end of the bushing with higher structural strength. The deformation stress generated by the rivet during the riveting process is completely guided to the bushing, avoiding the thin-walled impeller body from bearing the forming force during riveting, thereby reducing the risk of impeller body deformation and cracking.

[0016] (2) By setting a damping ring made of engineering plastic between the metal impeller body and the bushing, this application can effectively absorb and isolate the high-frequency vibration generated by high-speed rotation, avoid direct collision and friction between metal parts, significantly reduce the noise and vibration level during equipment operation, and improve product quality.

[0017] (3) The damping ring of this application includes a multi-layer hollow structure comprising a first plate, a second plate and a support portion. The support portion creates a gap between the first plate and the second plate, thereby exposing the middle part of the bushing to the outside and improving its cooling efficiency.

[0018] (4) Furthermore, the support part is constructed as a sheet structure, with multiple support parts distributed in a vortex shape and matching the rotation direction of the impeller. During operation, it can actively draw in external cold air and blow it over the outer wall surface of the middle section of the bushing at high speed, just like a centrifugal fan, forming efficient forced convection heat dissipation, which greatly enhances the heat dissipation capacity of the bushing and effectively suppresses the working temperature rise. Attached Figure Description

[0019] The present invention will be further described below with reference to the accompanying drawings and embodiments: Figure 1This is a structural diagram of an impeller assembly according to the present invention; Figure 2 This is a cross-sectional view of an impeller assembly according to the present invention; Figure 3 This is an exploded view of an impeller assembly according to the present invention; Figure 4 This is a side view of the damping ring described in this utility model; Figure 5 for Figure 4 Sectional view at point A in the middle; The components are: 1. Impeller body, 11. Upper impeller, 12. Middle impeller, 13. Lower impeller, 2. Shaft sleeve, 21. Center sleeve, 22. Mounting plate, 3. Rivet, 31. Head, 32. Riveted head, 4. Damping ring, 41. First layer plate, 42. Second layer plate, 43. Support part. Detailed Implementation

[0020] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "a plurality of" means two or more, unless otherwise expressly defined.

[0021] The present invention will be further described in detail below with reference to specific embodiments: like Figures 1-3 As shown, an impeller assembly includes an impeller body 1, a bushing 2, and a rivet 3.

[0022] The impeller body 1 and the bushing 2 are connected by rivets 3. The bushing 2 has a through hole along the rotation axis. The through hole is used to connect the output end of the external drive device, so that the external drive device can drive the impeller body 1 to rotate around the rotation axis.

[0023] The thickness dimension D1 of the impeller body 1 in the direction parallel to the axis is small. If the riveting head 32 of the rivet 3 is formed on the end face of the impeller body 1, the impeller body 1 is prone to deformation or even cracking when the riveting head 32 is formed.

[0024] Therefore, in this embodiment, the rivet 3 passes through the impeller body 1 and the bushing 2 in sequence from the end of the impeller body 1 away from the bushing 2, so that the head 31 of the rivet 3 abuts against the end of the impeller body 1 away from the bushing 2, and the riveting head 32 is formed at the end of the bushing 2 with a larger thickness dimension D2.

[0025] Both the impeller body 1 and the bushing 2 are made of metal. When rotating at high speed, they are prone to vibration and collision, which can generate noise and affect the connection strength of the rivets 3.

[0026] To address this issue, this application provides a damping ring 4 between the impeller body 1 and the bushing 2. The damping ring 4 is used to buffer the vibration between the impeller body 1 and the bushing 2.

[0027] Rivet 3 passes through the impeller body 1, damping ring 4, and bushing 2 sequentially along the axial direction, fixing the damping ring 4 and pressing it between the impeller body 1 and bushing 2. Furthermore, to increase the installation strength of the damping ring 4, adhesive is applied to both the mounting plate 22 and the end face of the impeller body 1 that abuts against the damping ring 4, and they are then bonded and fixed to the damping ring 4.

[0028] The damping ring 4 is made of a material with a lower hardness than the impeller body 1 and the bushing 2. In this embodiment, the damping ring 4 is made of engineering plastic.

[0029] Specifically, multiple rivets 3 are arranged around the rotation axis; the impeller body 1 includes an upper impeller 11, a middle impeller 12, and a lower impeller 13, wherein the lower impeller 13 is connected to the bushing 2 and the damping ring 4 by the rivets 3. The bushing 2 includes a central sleeve 21, which is configured as a cylindrical structure with a through hole along the axis of the central sleeve 21. A mounting plate 22 is integrally formed radially on the outer wall of the central sleeve 21, and the rivets 3 are arranged through the end face of the mounting plate 22. The damping ring 4 is sleeved on the central sleeve 21 and abuts against the end face of the mounting plate 22. The mounting plate 22 can be configured in various shapes. In the preferred embodiment of this application, the mounting plate 22 is constructed as a ring.

[0030] Meanwhile, the damping ring 4 can also buffer the riveting pressure when the rivet 3 is riveted.

[0031] After the equipment has been running for a long time, a high temperature will be generated between the bushing 2 and the output end of the external drive device. The high temperature will not only affect the mechanical properties of the bushing 2 and the impeller body 1, but also easily cause the adhesive of the damping ring 4 to fail due to heat, thereby affecting the installation strength of the damping ring 4.

[0032] In this regard, combined with Figure 4 and Figure 5 As shown, in a preferred embodiment, the damping ring 4 is configured as a multi-layer structure, including at least a first layer plate 41 and a second layer plate 42, and the first layer plate 41 and the second layer plate 42 are connected by a support portion 43. The support portion 43 creates a gap between the first layer plate 41 and the second layer plate 42, thereby exposing the outer wall of the middle section of the bushing 2. When the impeller is running, air can enter the outer wall of the middle section of the bushing 2 through the gap, thereby cooling the bushing 2.

[0033] Furthermore, multiple support parts 43 are evenly arranged around the rotation axis, and any support part 43 is set as a sheet structure. One side of the support part 43 perpendicular to the first layer plate 41 or the second layer plate 42 is close to the outer wall of the bushing 2, while the other side is far away from the outer wall of the bushing 2, so that the multiple support parts 43 are distributed in a vortex shape, and the vortex direction corresponds to the rotation direction of the impeller body 1, thereby forming multiple chambers connected to the central sleeve 21 between the first layer plate 41 and the second layer plate 42.

[0034] When the impeller body 1 rotates, the vortex-like structure formed by multiple support parts 43 can actively draw airflow from the outside into the chamber, forming a continuous forced convection cooling of the central sleeve 21.

[0035] In this embodiment, the damping ring 4 is made of engineering plastic and formed by 3D printing.

[0036] The above embodiments are only for illustrating the technical concept and features of this utility model, and are intended to enable those skilled in the art to understand the content of this utility model and implement it accordingly. They should not be construed as limiting the scope of protection of this utility model. It is obvious to those skilled in the art that this utility model is not limited to the details of the above exemplary embodiments, and that it can be implemented in other specific forms without departing from the spirit or basic characteristics of this utility model. Therefore, the embodiments should be considered exemplary and non-limiting in all respects. The scope of this utility model is defined by the appended claims rather than the foregoing description, and therefore, all changes falling within the meaning and scope of the equivalents of the claims are intended to be included within this utility model.

Claims

1. An impeller assembly, characterized in that, It includes the impeller body (1), the bushing (2), and the rivets (3); The impeller body (1) and the bushing (2) are connected by rivets (3). The bushing (2) has a through hole along the rotation axis. The through hole is used to connect the output end of the drive device, so that the drive device can drive the impeller body (1) to rotate around the rotation axis. The rivet (3) passes through the impeller body (1) and the bushing (2) sequentially from the end of the impeller body (1) away from the bushing (2), so that the head (31) of the rivet (3) abuts against the end of the impeller body (1) away from the bushing (2), and the riveting head (32) is formed at the end of the bushing (2).

2. The impeller assembly according to claim 1, characterized in that, The rivets (3) are arranged in multiples around the axis of rotation.

3. An impeller assembly according to claim 2, characterized in that, A damping ring (4) is provided between the impeller body (1) and the bushing (2); the rivet (3) passes through the impeller body (1), the damping ring (4) and the bushing (2) in sequence along the axial direction, so that the damping ring (4) is pressed between the impeller body (1) and the bushing (2).

4. An impeller assembly according to claim 3, characterized in that, The bushing (2) includes a central sleeve (21), the through hole is opened along the axis of the central sleeve (21), the outer wall of the central sleeve (21) is provided with a mounting plate (22) in the radial direction, the rivet (3) is provided through the mounting plate (22), and the damping ring (4) is sleeved on the central sleeve (21) and abuts against the end face of the mounting plate (22).

5. An impeller assembly according to claim 4, characterized in that, The damping ring (4) is configured as a multi-layer structure, including at least a first layer plate (41) and a second layer plate (42), and is provided with a support part (43) to connect the first layer plate (41) and the second layer plate (42), so that the planes on which the first layer plate (41) and the second layer plate (42) are located are parallel and form a gap.

6. An impeller assembly according to claim 5, characterized in that, The support (43) is uniformly arranged in multiple positions around the rotation axis. Any support (43) is set as a sheet structure. The multiple support (43) are arranged in a vortex shape, so that multiple chambers connected to the central sleeve (21) are formed between the first layer plate (41) and the second layer plate (42).

7. An impeller assembly according to claim 6, characterized in that, The damping ring (4) is made of engineering plastic through an integral molding process.

8. An impeller assembly according to claim 1, characterized in that, The mounting plate (22) and the impeller body (1) are both coated with adhesive on the end face of the damping ring (4) and are bonded and fixed to the damping ring (4).

9. An impeller assembly according to claim 1, characterized in that, The impeller body (1) includes an upper impeller (11), a middle impeller (12) and a lower impeller (13), and the rivet (3) passes through the lower impeller (13) to fix the damping ring (4) and the bushing (2).

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