Noise reduction blade
By designing the twisted blades and filling them with lightweight foam and setting reinforcement ribs, combined with carbon fiber composite materials, the problems of performance loss and wear during noise reduction in traditional blades are solved, achieving more efficient noise reduction and equipment performance improvement.
Patent Information
- Application Number
- CN202421137262.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-23
- Publication Date
- 2024-12-24
- Estimated Expiration
- Not applicable · inactive patent
AI Technical Summary
Traditional noise reduction blades sacrifice equipment performance when pursuing noise reduction, and are prone to wear and fatigue due to noise and vibration, affecting service life.
Design a noise reduction blade including twisted blades. Seven annular twisted blades are welded on the outer ring surface of the blade disc. The internal hollow design of the twisted blades is filled with light foam. It is equipped with connecting reinforcement ribs and built-in reinforcement ribs. It uses carbon fiber composite material to twist the whole blades. The twisted design is designed to form a pressure and suction surface, reducing material usage and improving resistance to bending and twisting.
By reducing the amount of material and increasing the moment of inertia, it avoids stress concentration, improves vibration damping performance, reduces noise, ensures smooth operation, and maintains good performance in high-temperature environments.
Smart Images
Figure CN222228963U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of fluid machinery, in particular to a noise reduction blade. Background Art
[0002] With the widespread application of fluid machinery in various fields, its noise problem has gradually attracted attention. The traditional noise reduction method is mainly achieved by installing sound insulation equipment on the outside of the machinery. Although this method can reduce noise to a certain extent, it will increase equipment cost and maintenance difficulty. In addition, traditional blades often sacrifice some performance in pursuit of noise reduction effects, resulting in reduced equipment operating efficiency. In addition, during the operation of traditional blades, due to the presence of noise and vibration, blade wear, fatigue and even breakage are easy to occur, thus affecting the service life of the equipment. For this reason, we designed a noise reduction blade. Utility Model Content
[0003] In order to solve the technical problem of large noise and vibration when the blade is running, the utility model provides a noise reduction blade.
[0004] The utility model is implemented by the following technical scheme: a noise reduction blade, including a blade disk, wherein the outer ring surface of the blade disk is welded with seven twisted blades distributed in a ring shape, and the root of the twisted blade is widened to form a connecting reinforcement rib, and the twisted blade is tightly connected to the blade disk through the connecting reinforcement rib to form a whole, and the interior of the twisted blade is hollow to form a filling cavity, and the filling cavity of each twisted blade is filled with lightweight foam.
[0005] As a further improvement of the above scheme, the outer diameter of the blade disk is 100 mm, and the spacing between two adjacent twisted blades is 14.29 mm, wherein the twisted blade is designed in a torsion angle shape as a whole, and the torsion angle of the twisted blade is 20-40 degrees. When the twisted blade is running, the amount of air in the root part and the tip part is different, and the air resistance it bears is also different. The twisted blade is twisted so that the root part maintains a large angle of attack, and the tip part gradually becomes a small angle of attack, thereby ensuring stability during operation.
[0006] As a further improvement of the above scheme, the overall twisted design of the twisted blade forms a pressure surface and a suction surface, wherein the angles formed between the pressure surface and the suction surface of the twisted blade are both acute angles, and the pressure along the blade height on the suction surface and the pressure surface are distributed in a C shape. Under its action, the boundary layers at both ends are sucked to the middle and carried away by the mainstream, so that the energy loss in the two end areas is reduced, and the energy loss in a certain section in the middle of the blade grid is increased, but in general, the energy loss in the middle area does not increase significantly, so the total energy loss is reduced, which can improve the performance of the equipment.
[0007] As a further improvement of the above scheme, a protrusion is formed on the outward protruding portion of the upper side portion of the pressure surface, and the interior of the protrusion is hollow to form a filling cavity, and a plurality of equally spaced built-in reinforcing ribs are arranged on the upper and lower sides of the filling cavity, wherein the built-in reinforcing ribs on the upper side and the built-in reinforcing ribs on the lower side are staggered, and the lightweight foam is filled into the gap between the plurality of built-in reinforcing ribs and the filling cavity. The design of the filling cavity and the lightweight foam can reduce the amount of material used and increase the moment of inertia of the twisted blades. The set built-in reinforcing ribs increase the strength of the twisted blades and guide the stress distribution at the same time to avoid stress concentration when the twisted blades are subjected to force, thereby improving the vibration reduction performance.
[0008] As a further improvement of the above scheme, the twisted blades and the built-in reinforcement ribs and the connecting reinforcement ribs are all made of carbon fiber composite materials, which can enhance the bending and twisting resistance of the twisted blades. The carbon fiber composite materials have a lower density, which can significantly reduce the mass of the blades and maintain good performance in high temperature environments.
[0009] As a further improvement of the above scheme, the connecting reinforcement rib is designed along the root of the twisted blade, and its curved shape matches the shape of the root of the twisted blade. The connecting reinforcement rib is tightly connected to the twisted blade structure to form a whole, thereby improving the wind load resistance, fatigue resistance and other performance of the blade.
[0010] Compared with the prior art, the beneficial effects of the present invention are:
[0011] 1. The utility model forms a filling cavity by designing the inner hollow of the twisted blade and fills the filling cavity with lightweight foam, so that the material consumption of the twisted blade is reduced and the moment of inertia of the twisted blade is increased. At the same time, the connecting reinforcement ribs and the built-in reinforcement ribs are arranged to guide the stress distribution, avoid the stress concentration phenomenon when the twisted blade is subjected to force, and improve the vibration reduction performance;
[0012] 2. By twisting the twisted blade as a whole and widening the root of the twisted blade to form a connecting reinforcement rib, the blade root maintains a large angle of attack and the blade tip gradually changes to a small angle of attack, ensuring stability during operation and reducing noise generated during operation. BRIEF DESCRIPTION OF THE DRAWINGS
[0013] Figure 1 A schematic diagram of the overall structure of a noise reduction blade provided by the utility model;
[0014] Figure 2 for Figure 1 A cross-sectional view of the middle section of the twisted blade;
[0015] Figure 3 for Figure 1 Bottom view of .
[0016] Description of main symbols:
[0017] 1. Blade disc; 2. Twisted blades; 21. Pressure surface; 22. Suction surface; 3. Connecting reinforcement ribs; 4. Lightweight foam; 5. Built-in reinforcement ribs. DETAILED DESCRIPTION
[0018] The present invention is further described below in conjunction with the accompanying drawings and specific implementation methods. It should be noted that, under the premise of no conflict, the various embodiments or technical features described below can be arbitrarily combined to form a new embodiment.
[0019] Example:
[0020] Please combine Figure 1-Figure 3 A noise reduction blade of the present embodiment includes a blade disk 1, and seven twisted blades 2 distributed in a ring are welded on the outer ring surface of the blade disk 1, and the root of the twisted blade 2 is widened to form a connecting reinforcement rib 3. The twisted blade 2 is tightly connected to the blade disk 1 through the connecting reinforcement rib 3 to form a whole. The interior of the twisted blade 2 is hollow to form a filling cavity, and the filling cavity of each twisted blade 2 is filled with lightweight foam 4.
[0021] The outer diameter of the blade disk 1 is 100 mm, and the spacing between two adjacent twisted blades 2 is 14.29 mm. The twisted blade 2 is designed in a torsion angle shape as a whole, and the torsion angle of the twisted blade 2 is 20-40 degrees. When the twisted blade 2 is running, the amount of air in the root part and the tip part is different, and the air resistance it bears is also different. The twisted blade 2 is twisted so that the root part maintains a large angle of attack and the tip part gradually becomes a small angle of attack, thereby ensuring stability during operation.
[0022] The overall twisted design of the twisted blade 2 forms a pressure surface 21 and a suction surface 22, wherein the angles formed between the pressure surface 21 and the suction surface 22 of the twisted blade 2 are both acute angles, and the pressure along the blade height on the suction surface 22 and the pressure surface 21 are C-shaped distributions. Under its action, the boundary layers at both ends are sucked to the middle and carried away by the mainstream, so that the energy loss in the two end areas is reduced, and the energy loss in a certain section in the middle of the blade cascade is increased. However, in general, the energy loss in the middle area does not increase significantly, so the total energy loss is reduced, which can improve the performance of the equipment.
[0023] The front part of the pressure surface 21 is formed with a protrusion on the outward protrusion, and the interior of the protrusion is hollow to form a filling cavity, and a plurality of equally spaced built-in reinforcing ribs 5 are arranged on the upper and lower sides of the filling cavity, wherein the upper built-in reinforcing ribs 5 and the lower built-in reinforcing ribs 5 are staggered, and the lightweight foam 4 is filled into the gap between the plurality of built-in reinforcing ribs 5 and the filling cavity. The design of the filling cavity and the lightweight foam 4 can reduce the amount of material used and increase the moment of inertia of the twisted blade 2. The set built-in reinforcing ribs 5 increase the strength of the twisted blade 2 and guide the stress distribution at the same time to avoid stress concentration when the twisted blade 2 is subjected to force, thereby improving the vibration reduction performance.
[0024] The twisted blade 2, the built-in reinforcement ribs 5 and the connecting reinforcement ribs 3 are all made of carbon fiber composite materials, which can enhance the bending and twisting resistance of the twisted blade 2. The carbon fiber composite material has a lower density, which can significantly reduce the mass of the blade and maintain good performance in a high temperature environment.
[0025] The connecting reinforcement rib 3 is designed along the root of the twisted blade 2, and its curved shape matches the root shape of the twisted blade 2. The connecting reinforcement rib 3 is tightly connected to the twisted blade 2 structure to form a whole, thereby improving the wind load resistance, fatigue resistance and other performance of the blade.
[0026] The implementation principle of a noise reduction blade in the embodiment of the present application is as follows: by forming a filling cavity by designing the inner hollow of the twisted blade 2, and filling the filling cavity with a lightweight foam 4, the material usage of the twisted blade 2 is reduced and the moment of inertia of the twisted blade 2 is increased. At the same time, the connecting reinforcement ribs 3 and the built-in reinforcement ribs 5 are provided to guide the stress distribution, avoid stress concentration when the twisted blade 2 is subjected to force, and improve the vibration reduction performance;
[0027] By twisting the twisted blade 2 as a whole and widening the root of the twisted blade 2 to form a connecting reinforcement rib 3, the blade root maintains a large angle of attack and the blade tip gradually becomes a small angle of attack, thereby ensuring stability during operation and reducing noise generated during operation.
[0028] The above-mentioned implementation modes are only preferred implementation modes of the present invention, and cannot be used to limit the protection scope of the present invention. Any non-substantial changes and substitutions made by technicians in this field on the basis of the present invention shall fall within the scope of protection required by the present invention.
Claims
1. A noise reduction blade, comprising a blade disk (1), characterized in that: Seven twisted blades (2) distributed in an annular shape are welded to the outer surface of the blade disk (1), and the roots of the twisted blades (2) are widened to form connecting reinforcement ribs (3). The twisted blades (2) are tightly connected to the blade disk (1) via the connecting reinforcement ribs (3) to form a whole. The interior of the twisted blades (2) is hollow to form a filling cavity, and the filling cavity of each twisted blade (2) is filled with lightweight foam (4).
2. A noise reduction blade according to claim 1, characterized in that: The outer diameter of the blade disk (1) is 100 mm, and the spacing between two adjacent twisted blades (2) is 14.29 mm, wherein the twisted blades (2) are designed as a whole in a twisted angle shape, and the twist angle of the twisted blades (2) is 20-40 degrees.
3. A noise reduction blade according to claim 1, characterized in that: The twisted blade (2) is designed as an entire twist so that it forms a pressure surface (21) and a suction surface (22), wherein the angle formed between the pressure surface (21) and the suction surface (22) of the twisted blade (2) is an acute angle.
4. A noise reduction blade according to claim 3, characterized in that: The front part of the pressure surface (21) is formed with a protrusion on the outwardly protruding part, and the interior of the protrusion is hollow to form a filling cavity, and a plurality of built-in reinforcing ribs (5) are arranged at equal intervals on both the upper and lower sides of the filling cavity, wherein the built-in reinforcing ribs (5) on the upper side and the built-in reinforcing ribs (5) on the lower side are staggered, and the lightweight foam (4) is filled into the gaps between the plurality of built-in reinforcing ribs (5) and the filling cavity.
5. The noise reduction blade according to claim 1, characterized in that: The twisted blades (2), the built-in reinforcing ribs (5), and the connecting reinforcing ribs (3) are all made of carbon fiber composite materials.
6. The noise reduction blade according to claim 1, characterized in that: The connecting reinforcement rib (3) is designed along the root of the twisted blade (2), and its curved shape matches the shape of the root of the twisted blade (2).