Compressor blade

Abstract

The utility model belongs to the field of compressor blades, and particularly relates to a compressor blade which comprises a blade assembly and a mounting plate, a groove is formed in a blade in the blade assembly, the groove is divided into a first cavity and a second cavity by a fixing plate, and polyurethane foam is filled in the first cavity and the second cavity; reinforcing ribs penetrating through the through holes of the fixing plates are arranged in the grooves, and the two ends of each reinforcing rib are fixed to the upper wall and the lower wall of the corresponding groove. During working, the flow guide grooves guide airflow to accelerate convergence, and the compression efficiency is improved; the polyurethane foam and the reinforcing ribs are combined to achieve damping and structural strengthening, and blade deformation is avoided. The utility model solves the problems of large airflow loss, insufficient structural strength and obvious vibration of the traditional blade, and has the advantages of high compression efficiency, strong stability and long service life.

Description

Technical Field

[0001] This utility model relates to the field of compressor blades, specifically a compressor blade. Background Technology

[0002] The blade is one of the components of the compressor impeller. When the motor drives the rotor to rotate, the centrifugal force causes the blade to contact the stator, compressing the air in the space composed of the casing, rotor and blade. Each rotation of the rotor causes the volume of multiple units to change in sequence, so that air is drawn in when the volume increases and compressed and discharged when the volume decreases. In the operation of the compressor equipment, the blade is the core component for realizing gas compression, and its structural design directly affects the efficiency, stability and service life of the equipment.

[0003] Existing compressor blades have the following problems in practical applications:

[0004] 1. Low airflow guidance efficiency: Traditional blade surface guide structure design is unreasonable. Most blade surface guide grooves use rectangular or straight cross sections and have fixed distribution angles, making it difficult for airflow to form a stable flow trajectory. When gas enters the compressor, due to the unreasonable change in the cross section of the guide grooves, the airflow easily generates strong vortices and separation phenomena on the blade surface, resulting in large energy loss and low efficiency in the compression process.

[0005] 2. Insufficient structural strength: Under high-speed rotation and high-pressure gas, blades are prone to bending or deformation due to centrifugal force and gas pressure. Traditional blades are mostly made of integral metal casting or splicing structure, which has a certain strength, but is heavy. When rotating at high speed, the centrifugal force on the blade can be thousands of times its own weight, which can easily cause fatigue cracks at the root or stress concentration points, affecting compression accuracy and blade life.

[0006] 3. Vibration and noise issues: Traditional blades are mostly solid structures or simple cavity designs, lacking shock absorption and buffering mechanisms. When the blade rotation frequency is close to its own natural frequency, resonance is easily triggered, which not only shortens the life of the component, but also generates a lot of noise. Therefore, a compressor blade is proposed to address the above problems. Utility Model Content

[0007] To address the issues of insufficient structural strength, low airflow guidance efficiency, vibration, and noise in existing technologies, this invention proposes a compressor blade.

[0008] The technical solution adopted by this utility model to solve its technical problem is: a compressor blade, including a blade assembly and a mounting plate.

[0009] The blade assembly includes a blade and a fixing plate. The blade has a groove inside, and the fixing plate is fixed in the groove of the blade. The fixing plate divides the groove of the blade into a first cavity and a second cavity, and both the first cavity and the second cavity are filled with polyurethane foam.

[0010] The mounting plate is fixed to the end face of the blade, and multiple guide grooves are opened on the top of the blade. Reinforcing ribs are fixedly connected in the grooves of the blade.

[0011] Preferably, the top and bottom of the reinforcing rib are fixed to the top and bottom of the inner wall of the blade groove, respectively.

[0012] Preferably, the fixing plate has an opening, and the reinforcing rib passes through and fits into the opening of the fixing plate.

[0013] Preferably, the end of the reinforcing rib penetrates the first cavity and is located on the inner wall of the second cavity.

[0014] Preferably, the guide grooves are trapezoidal in shape, smaller at the front and larger at the back, and are distributed at equal intervals on the blades.

[0015] The advantages of this utility model are:

[0016] 1. This utility model achieves the function of accelerating and converging airflow and guiding direction by means of a trapezoidal shape with the guide grooves being smaller at the front and larger at the back and distributed at equal intervals. This solves the problems of turbulent airflow and high energy loss in traditional blades and improves the efficiency of gas compression.

[0017] 2. This utility model divides the blade groove into a first cavity and a second cavity by fixing plate and filling them with polyurethane foam. At the same time, the structural design of reinforcing ribs penetrating the fixing plate opening and connecting the upper and lower walls of the blade groove achieves the functions of reducing blade weight, absorbing vibration and enhancing structural strength. It solves the problems of easy deformation and large vibration when the blade rotates at high speed and improves the adaptability of the blade under high pressure conditions. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the compressor blade structure of this utility model;

[0020] Figure 2 This is a schematic diagram of the structure of the rear side of the compressor blade of this utility model;

[0021] Figure 3 This is a schematic diagram of the structure at the bottom of the compressor blade of this utility model;

[0022] Figure 4 This is a schematic diagram of the internal structure of the compressor blade of this utility model;

[0023] Figure 5 This is a schematic diagram of the internal structure of the blade assembly of this utility model.

[0024] In the figure: 1. Blade assembly; 101. Blade; 102. First cavity; 103. Polyurethane foam; 104. Fixing plate; 105. Second cavity; 2. Mounting plate; 3. Guide channel; 4. Reinforcing rib. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.

[0026] The following is in conjunction with the appendix Figure 1-5 This application will be described in further detail.

[0027] This application discloses a compressor blade. (Refer to...) Figures 1 to 5 A compressor blade includes a blade assembly 1 and a mounting plate 2.

[0028] The blade assembly 1 includes a blade 101 and a fixing plate 104. The blade 101 has a groove inside, and the fixing plate 104 is fixed in the groove of the blade 101. The fixing plate 104 divides the groove of the blade 101 into a first cavity 102 and a second cavity 105. The first cavity 102 and the second cavity 105 are both filled with polyurethane foam 103.

[0029] The polyurethane foam 103 in the first cavity 102 and the second cavity 105 absorbs high-frequency vibrations when the blades rotate. The fixing plate 104 divides the cavity into independent spaces to prevent vibrations from being transmitted and amplified within the cavity. The design of the reinforcing rib 4 penetrating the cavity further disperses the vibration energy, enhances the overall stability of the blades, and the shock-absorbing structure can extend the service life of the blades, reduce the risk of failure during compressor operation, reduce noise, and improve the smoothness of equipment operation.

[0030] The mounting plate 2 is fixed on the end face of the blade 101. The top of the blade 101 is provided with a plurality of guide grooves 3. The guide grooves 3 are trapezoidal in shape, smaller at the front and larger at the back, and are distributed at equal intervals on the blade 101.

[0031] Gas flows in from the compressor inlet and first contacts the guide groove 3 at the top of the blade 101. The trapezoidal cross-section of the guide groove 3, which is smaller at the front and larger at the back, has a contraction and acceleration effect on the airflow. The inclined distribution angle guides the airflow along the blade surface towards the center of the compressor, forming an orderly airflow channel. The design of the guide groove 3 can reduce airflow resistance, reduce energy loss, and allow the gas to enter the compression chamber at a higher speed and pressure, thereby improving compression efficiency.

[0032] A reinforcing rib 4 is fixedly connected to the groove of the blade 101. The top and bottom of the reinforcing rib 4 are fixed to the top and bottom of the inner wall of the groove of the blade 101, respectively. An opening is provided on the fixing plate 104. The reinforcing rib 4 passes through and fits into the opening of the fixing plate 104. The end of the reinforcing rib 4 passes through the first cavity 102 and is located on the inner wall of the second cavity 105.

[0033] Mounting plate 2 is welded and fixed to the end face of blade 101 and connected to the compressor rotor, driving blade 101 to rotate at high speed. When blade 101 rotates, its curved structure generates thrust on the airflow, compressing the gas. At this time, the reinforcing rib 4 inside blade 101 plays a key role: its top and bottom are fixed to the inner wall of the blade groove, it penetrates the opening of fixing plate 104 and extends to the inner wall of the second cavity 105, forming a three-dimensional support structure to resist centrifugal force and gas pressure during rotation. The combination of reinforcing rib 4 and fixing plate 104 gives blade 101 high structural strength and avoids affecting compression accuracy due to deformation under force. The cavity filled with polyurethane foam 103 reduces the weight of the blade, reduces the rotor load, and reduces vibration and noise. The cross-section of reinforcing rib 4 is wavy.

[0034] Working principle: The compressor blades achieve gas compression through the airflow guidance design of the guide groove 3 and the structural strength optimization of the blade assembly 1. The specific principle is as follows:

[0035] Airflow guidance principle:

[0036] The guide groove 3 is trapezoidal in shape, smaller at the front and larger at the back, and is distributed at equal intervals and at an angle at the top of the blade 101. When gas flows in, the trapezoidal structure, smaller at the front and larger at the back, can gradually accelerate and converge the airflow, while the angled distribution guides the airflow to form a stable flow trajectory along the blade surface, reducing airflow separation and eddy current losses, thereby improving gas compression efficiency.

[0037] Structural strength and vibration reduction principles:

[0038] The groove inside the blade 101 is divided into a first cavity 102 and a second cavity 105 by the fixing plate 104, and the cavities are filled with polyurethane foam 103. The polyurethane foam has both lightweight and shock-absorbing properties, which can reduce the overall weight of the blade and absorb the vibration of the blade during high-speed rotation, avoiding structural damage caused by resonance. The reinforcing rib 4 passes through the opening of the fixing plate 104, connecting the top and bottom of the blade groove to form a "skeleton" structure, which enhances the blade's bending and torsional strength and prevents the blade from deforming under high pressure.

[0039] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.

Claims

1. A compressor blade, characterized in that... ,include: The blade assembly (1) includes a blade (101) and a fixing plate (104). The blade (101) has a groove inside. The fixing plate (104) is fixed in the groove of the blade (101). The fixing plate (104) divides the groove of the blade (101) into a first cavity (102) and a second cavity (105). The first cavity (102) and the second cavity (105) are both filled with polyurethane foam (103). Mounting plate (2), which is fixed on the end face of blade (101), and multiple guide grooves (3) are provided on the top of blade (101), and reinforcing ribs (4) are fixedly connected in the groove of blade (101).

2. A compressor blade according to claim 1, characterized in that: The top and bottom of the reinforcing rib (4) are respectively fixed to the top and bottom of the groove of the blade (101).

3. A compressor blade according to claim 1, characterized in that: The fixing plate (104) has an opening, and the reinforcing rib (4) passes through and fits into the opening of the fixing plate (104).

4. A compressor blade according to claim 3, characterized in that: The end of the reinforcing rib (4) passes through the first cavity (102) and is located on the inner wall of the second cavity (105).

5. A compressor blade according to claim 1, characterized in that: The guide groove (3) is trapezoidal in shape, smaller at the front and larger at the back, and is distributed at equal intervals on the blade (101).

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