Method and system for testing reliability of deicing blower

Abstract

The invention provides a deicing blower reliability test method and system. The method comprises the following steps: detecting a connection strength value of a blade and an impeller and obtaining a first threshold value; whether the connection strength of the blades and the impeller reaches the standard or not is determined according to the connection strength value and a first threshold value; detecting a blade strength value of the blade and obtaining a second threshold value; determining whether the blade strength of the blade reaches the standard or not according to the blade strength value and a second threshold value; under the condition of determining that the connection strength and the blade strength reach the standard, simulating an actual operation working condition and detecting the impeller strength of the impeller; and combining the connection strength value, the blade strength value and the impeller strength to determine whether the reliability of the to-be-tested blower reaches the standard. According to the invention, the reliability of the to-be-tested blower is evaluated by testing the connection strength, the blade strength and the impeller strength, so that the reliability evaluation of the to-be-tested blower is more accurate and comprehensive, the particularity of the operating environment of the power generation blades of the to-be-tested blower can be considered, and the application scene of the reliability evaluation of the to-be-tested blower is wider.

Description

Technical Field

[0001] The invention belongs to the technical field of wind power generation deicing, and in particular relates to a deicing blower reliability testing method and system. Background Art

[0002] With the continuous expansion of wind power installed capacity, a large number of wind turbines are built in heavy icing areas, where the blades are easily covered with ice in winter. Ice on the blades will increase the load on the blades and the wind turbine shaft, change the airfoil of the blades, directly reduce the life of related parts, reduce the expected output, and seriously affect the safe and reliable operation of the wind turbine system.

[0003] Gas heating deicing is one of the reliable deicing methods for generator blades. Its principle is to blow hot air into the inner cavity through the deicing blower inside the generator blade, so as to heat the generator blade wall and achieve the purpose of deicing. As a key component of gas heating deicing equipment, the performance and reliability of the deicing blower directly determine the deicing effect in winter. However, due to the particularity of the operating environment of the deicing blower's generator blades, there is currently a lack of effective methods for testing the reliability of the deicing blower. Summary of the invention

[0004] The main purpose of the present invention is to provide a deicing blower reliability test method and system to solve the technical problem of the lack of an effective method for reliability testing of a deicing blower to be tested in the prior art.

[0005] In order to achieve the above object, the present invention provides a deicing blower reliability test method for a blower to be tested, wherein the blower to be tested comprises an impeller and blades connected to the impeller, and the deicing blower reliability test method comprises:

[0006] Detecting the connection strength value between the blade and the impeller and obtaining a first threshold value;

[0007] Determining whether the connection strength between the blade and the impeller meets the standard according to the connection strength value and the first threshold;

[0008] detecting a blade strength value of the blade and obtaining a second threshold;

[0009] Determining whether the blade strength of the blade meets the standard according to the blade strength value and the second threshold;

[0010] When it is determined that the connection strength and the blade strength meet the standards, simulating actual operating conditions and testing the impeller strength of the impeller;

[0011] Whether the reliability of the blower to be tested meets the standard is determined by combining the connection strength value, the blade strength value and the impeller strength.

[0012] In an embodiment of the present invention, detecting the connection strength value between the blade and the impeller and obtaining the first threshold value includes:

[0013] Acquire an initial appearance image of the blower to be tested before testing;

[0014] Fixing the blower to be tested on a tensile testing machine, controlling the tensile testing machine to apply a static load to the blades of the blower along the radial direction of the blades, and acquiring a current appearance image of the blower to be tested;

[0015] Acquire a static load failure value of the blower to be tested according to the initial appearance image and the current appearance image, and use the static load failure value as a connection strength value;

[0016] A preset static load is obtained as a first threshold.

[0017] In an embodiment of the present invention, the step of obtaining the static load failure value of the blower to be tested according to the initial appearance image and the current appearance image includes:

[0018] Comparing the current appearance image with the initial appearance image to obtain a current state of the blower to be tested;

[0019] The static load failure value of the blower to be tested is determined according to the current state of the blower to be tested.

[0020] In an embodiment of the present invention, determining the static load failure value of the blower to be tested according to the current state of the blower to be tested includes:

[0021] It is determined that the blower to be tested is in a static load failure state, the current static load of the tensile machine is obtained, and the current static load is used as a static load failure value.

[0022] In the embodiment of the present invention, detecting the blade strength value of the blade and obtaining the second threshold value includes:

[0023] Fixing the blower to be tested on a vibration test bench;

[0024] Obtaining preset vibration parameters and controlling the vibration test bench to perform simulated vibration according to the preset vibration parameters; controlling the blower to be tested to run at a rated speed in a simulated vibration environment to obtain the maximum vibration amplitude of the blade tip of the blower to be tested, and using the maximum vibration amplitude of the blade tip as the blade strength value;

[0025] A preset blade vibration amplitude of the blade is obtained as a second threshold.

[0026] In an embodiment of the present invention, the step of obtaining preset vibration parameters and controlling the vibration test bench to perform simulated vibration according to the preset vibration parameters; controlling the blower to be tested to operate at a rated speed in a simulated vibration environment to obtain the maximum vibration amplitude of the blade tip of the blower to be tested, and using the maximum vibration amplitude of the blade tip as the blade strength value includes:

[0027] Controlling the vibration test table to vibrate the blower to be tested along the X-axis, Y-axis, and Z-axis directions at a preset acceleration within a preset vibration frequency range;

[0028] The maximum axial displacement of the blade tip and the maximum circumferential displacement of the blade tip of the blower to be tested within a preset vibration period are obtained and used as the maximum vibration amplitude of the blade tip.

[0029] In an embodiment of the present invention, a blade tip timing sensor and a key phase sensor are installed in the volute of the blower to be tested, and obtaining the maximum axial displacement of the blade tip and the maximum circumferential displacement of the blade tip of the blower to be tested within a preset vibration period includes:

[0030] Detecting the blade tip axial amplitude change line and the blade tip circumferential amplitude change line of the blower to be tested by the blade tip timing sensor and the key phase sensor;

[0031] According to the blade tip axial amplitude variation line and the blade tip circumferential amplitude variation line, the maximum axial displacement of the blade tip and the maximum circumferential displacement of the blade tip of the blower to be tested within a preset vibration period are determined.

[0032] In an embodiment of the present invention, the blower to be tested is used to be installed on a wind turbine blade of a wind turbine generator and to de-ice the wind turbine blade. The simulating actual operating conditions and detecting the impeller strength of the impeller includes:

[0033] Acquire the actual installation state of the blower to be tested, and fix the blower to be tested on a rotating test bench by simulating the actual installation state;

[0034] Acquiring actual operating parameters of the wind turbine, determining experimental parameters of the rotating test bench according to the actual operating parameters, and driving the rotating test bench to rotate with equal centrifugal force according to the experimental parameters;

[0035] Controlling the blower to be tested to run at a preset overspeed rate for a preset time, and obtaining the overspeed deformation amount of the blower to be tested;

[0036] The impeller strength is determined according to the overspeed deformation amount.

[0037] In an embodiment of the present invention, controlling the blower to be tested to run at a preset overspeed rate for a preset time and obtaining the overspeed deformation amount of the blower to be tested includes:

[0038] Acquire an initial appearance image of the blower to be tested before testing;

[0039] Controlling the blower to be tested to run at a preset overspeed rate for a preset time, and obtaining an overspeed appearance image of the blower to be tested;

[0040] The overspeed deformation amount of the blower to be tested is obtained according to the initial appearance image and the overspeed operation image.

[0041] The present invention also provides a deicing blower reliability testing system, the deicing blower reliability testing system comprising:

[0042] Tensile testing machine, used to test the connection strength of blades and impellers;

[0043] A vibration test bench, used for testing the blade strength value of the blade;

[0044] Rotating test bench for testing the impeller strength of the impeller;

[0045] A controller, wherein the tensile machine, the vibration test bench, and the rotation test bench are all electrically connected to the controller, and the controller is used to execute the above-mentioned deicing blower reliability test method.

[0046] Through the above technical solution, the deicing blower reliability testing method provided by the embodiment of the present invention has the following beneficial effects:

[0047] When the reliability test of the blower to be tested is conducted using the de-icing blower reliability test method, the blade strength of the blade and the connection strength of the blade impeller can be tested first. When the blade strength and the connection strength are both up to standard, the impeller strength of the blower to be tested can be tested. The order of blade strength and connection strength testing can be pre-set. Testing the blade strength and connection strength in accordance with the pre-set test order can ensure that when the specific components are tested qualified, the actual operation simulation is then performed to test the impeller strength, which can save testing time and improve test efficiency. When at least one of the connection strength value, the blade strength value, and the impeller strength does not meet the standard conditions, it can be determined that the reliability of the blower to be tested does not meet the standard. When all three of the connection strength value, the blade strength value, and the impeller strength meet the standard conditions, it can be determined that the reliability of the blower to be tested meets the standard, which can ensure the accuracy of the reliability evaluation of the blower to be tested. In the present invention, the reliability of the blower to be tested is evaluated by testing the three dimensions of connection strength, blade strength and impeller strength, which can make the reliability evaluation of the blower to be tested more accurate and comprehensive, and can take into account the particularity of the operating environment of the power generation blades of the blower to be tested, so that the application scenarios of the reliability evaluation of the blower to be tested are more extensive.

[0048] Other features and advantages of the present invention will be described in detail in the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0049] The accompanying drawings are used to provide an understanding of the present invention and constitute a part of the specification. Together with the following specific embodiments, they are used to explain the present invention, but do not constitute a limitation of the present invention. In the accompanying drawings:

[0050] Figure 1 is a flow chart of a method for testing the reliability of a de-icing blower according to an embodiment of the present invention;

[0051] Figure 2 Schematic diagram of the structure of a detection fixture in a deicing blower reliability test system according to an embodiment of the present invention.

[0052] Label Name Label Name

[0053] 100 Detection fixture 3 Connection plate

[0054] 1 Fixed disc 200 Impeller

[0055] 11 Limiting plate 210 Rotating shaft

[0056] 12 Limited Space DETAILED DESCRIPTION

[0057] The present invention is described below in conjunction with the accompanying drawings.

[0058] It should be understood that the specific embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0059] The following describes a de-icing blower reliability testing method according to the present invention with reference to the accompanying drawings.

[0060] In an embodiment of the present invention, a deicing blower reliability test method is used for a blower to be tested, wherein the blower to be tested includes an impeller 200 and blades connected to the impeller 200, such as Figure 1 As shown, the de-icing blower reliability test method includes:

[0061] Step S1, detecting the connection strength value between the blade and the impeller 200 and obtaining a first threshold value;

[0062] Step S2, determining whether the connection strength between the blade and the impeller 200 meets the standard according to the connection strength value and the first threshold;

[0063] When the connection strength value is not lower than the first threshold, it can be determined that the connection strength meets the standard; when the connection strength value is lower than the first threshold, it can be determined that the connection strength does not meet the standard;

[0064] Step S3, detecting the blade strength value of the blade and obtaining a second threshold;

[0065] Step S4, determining whether the blade strength of the blade meets the standard according to the blade strength value and the second threshold;

[0066] When the blade strength value does not exceed the second threshold, it can be determined that the blade strength meets the standard. When the blade strength value exceeds the second threshold, it can be determined that the blade strength does not meet the standard. The blade strength value can be the maximum vibration amplitude of the blade tip.

[0067] Step S5, when it is determined that the connection strength and the blade strength meet the standards, simulate the actual operating conditions and detect the impeller strength of the impeller 200;

[0068] Step S6, determining whether the reliability of the blower to be tested meets the standard by combining the connection strength value, the blade strength value and the impeller strength;

[0069] If all three meet the standards, it can be determined that the reliability of the blower under test meets the standards.

[0070] It can be understood that the blower to be tested in this embodiment is mainly used as a deicing blower for deicing a wind turbine, and the first threshold value and the second threshold value can be preset.

[0071] When the reliability test method for the deicing blower in this embodiment is used to test the reliability of the blower to be tested, the blade strength of the blade and the connection strength of the blade impeller 200 can be tested first. When the blade strength and the connection strength are both up to standard, the impeller strength of the blower to be tested can be tested. The order of testing the blade strength and the connection strength can be pre-set. Testing the blade strength and the connection strength according to the pre-set test order can ensure that when the specific components are tested qualified, the actual operation simulation is then carried out to test the impeller strength, which can save testing time and improve test efficiency. When at least one of the connection strength value, the blade strength value, and the impeller strength does not meet the standard conditions, it can be determined that the reliability of the blower to be tested does not meet the standard. When all three of the connection strength value, the blade strength value, and the impeller strength meet the standard conditions, it can be determined that the reliability of the blower to be tested meets the standard, which can ensure the accuracy of the reliability evaluation of the blower to be tested. In this embodiment, the reliability of the blower to be tested is evaluated by testing the three dimensions of connection strength, blade strength and impeller strength, which can make the reliability evaluation of the blower to be tested more accurate and comprehensive, and can take into account the particularity of the operating environment of the power generation blades of the blower to be tested, so that the application scenarios of the reliability evaluation of the blower to be tested are more extensive.

[0072] Specifically, detecting the connection strength value between the blade and the impeller 200 and obtaining the first threshold value includes:

[0073] Acquire an initial appearance image of the blower to be tested before testing;

[0074] The blower to be tested is fixed on a tensile testing machine, and the tensile testing machine is controlled to apply a static load to the blades along the radial direction of the blower blades (i.e., in the outward direction from the center of the impeller 200), and a current appearance image of the blower to be tested is obtained;

[0075] Obtaining a static load failure value of the blower to be tested according to the initial appearance image and the current appearance image, and using the static load failure value as a connection strength value;

[0076] A preset static load is obtained as a first threshold.

[0077] It should be noted that before the blade strength and connection strength tests, the initial appearance image can be used to determine whether there are burrs, cracks, etc. on the surface of the impeller 200 to determine whether the surface smoothness of the impeller 200 meets the standard. The initial appearance image can be used to determine whether there is welding at the joint between the blade and the impeller 200 and whether the blade clip riveting is in place to determine whether the connection completion of the blower to be tested meets the standard. When the surface smoothness of the impeller 200 meets the standard and the connection completion of the blower to be tested meets the standard, it can be determined that the blower to be tested meets the reliability test conditions, and the blower to be tested can be subjected to subsequent blade strength, connection strength and impeller strength tests. Judging whether the blower to be tested meets the reliability test conditions before the strength test of specific components can avoid the situation where defective product testing leads to incorrect reliability evaluation.

[0078] It should be noted that the first threshold value may be 4000N. When it is determined that the static load failure value is not less than 4000N, it can be determined that the blade strength of the blower to be tested meets the standard. When it is determined that the static load failure value is less than 4000N, it can be determined that the blade strength of the blower to be tested does not meet the standard.

[0079] In one embodiment, obtaining the static load failure value of the blower to be tested according to the initial appearance image and the current appearance image includes:

[0080] Compare the current appearance image with the initial appearance image to obtain the current state of the blower to be tested;

[0081] The static load failure value of the blower to be tested is determined according to the current state of the blower to be tested.

[0082] After the blower to be tested is fixed, the blower to be tested can be slowly loaded through a tension testing machine. Specifically, a static load of 200N can be increased every 60s, and the static load at each time can be recorded in real time. In this embodiment, the static load implemented by the tension testing machine is obtained in real time to check the maximum static load of the blade in the direction of rotational centrifugal force. By comparing the current appearance image with the initial appearance image, the state of the blower to be tested under different static loads can be determined, and the maximum static load that the blower to be tested can withstand can be determined as the static load failure value. In one embodiment, the current appearance image and the initial appearance image can be compared to determine whether the blower to be tested has cracks in the connection under the static load. The cracks in the connection can be determined by comparing the edges or locating the connection, and the static load failure value can be accurately obtained.

[0083] It can be understood that determining the static load failure value of the blower to be tested according to the current state of the blower to be tested includes:

[0084] It is determined that the blower to be tested is in a static load failure state, the current static load of the tensile machine is obtained, and the current static load is used as the static load failure value.

[0085] In this embodiment, by comparing the edges of the current appearance image and the initial appearance image or comparing the shapes of the connections, it can be determined that the blower under test has cracks in the connection under the action of the static load, and the blower under test is judged to be in a static load failure state, and the current static load of the tensile machine is obtained, which can be used as the static load failure value.

[0086] In the embodiment of the present invention, detecting the blade strength value of the blade and obtaining the second threshold value includes:

[0087] Fix the blower to be tested on the vibration test bench;

[0088] Obtain preset vibration parameters and control the vibration test bench to perform simulated vibration according to the preset vibration parameters; control the blower to be tested to run at a rated speed in a simulated vibration environment to obtain the maximum vibration amplitude of the blade tip of the blower to be tested, and use the maximum vibration amplitude of the blade tip as the blade strength value;

[0089] A preset blade vibration amplitude of the blade is acquired as a second threshold.

[0090] In this embodiment, the blower is subjected to simulated vibration through a vibration test bench, and the blower to be tested is controlled to run at a rated speed in a simulated vibration environment. The maximum amplitude of the blade tip vibration of the blower to be tested within a preset vibration period can be obtained, and the maximum amplitude of the blade tip vibration is used as the blade strength value. It can be combined with long-term constant centrifugal force and random frequency amplitude vibration environment to comprehensively examine the operation of blade static load and blade tip vibration parameters, so as to more comprehensively evaluate the reliability of the blower to be tested.

[0091] In one embodiment, obtaining preset vibration parameters and controlling the vibration test bench to simulate vibration according to the preset vibration parameters; controlling the blower to be tested to run at a rated speed in a simulated vibration environment to obtain the maximum vibration amplitude of the blade tip of the blower to be tested, and using the maximum vibration amplitude of the blade tip as the blade strength value includes:

[0092] Control the vibration test bench to vibrate the blower to be tested along the X-axis, Y-axis and Z-axis directions at a preset acceleration within a preset vibration frequency range;

[0093] The maximum axial displacement of the blade tip and the maximum circumferential displacement of the blade tip of the blower to be tested within a preset vibration period are obtained and used as the maximum amplitude of blade tip vibration.

[0094] Specifically, the vibration test bench can be controlled to vibrate the blower to be tested along the X-axis, Y-axis, and Z-axis directions. The preset vibration frequency range can be 10Hz to 150Hz, the preset acceleration can be 2g, the frequency sweep times can be higher than 20 times, and the maximum axial displacement of the blade tip within the preset vibration period does not exceed 0.5mm, and the maximum circumferential displacement of the blade tip does not exceed 1mm, then it is determined that the blade strength meets the standard. In this embodiment, the maximum axial displacement of the blade tip and the maximum circumferential displacement of the blade tip are used as the maximum amplitude of the blade tip vibration, which can comprehensively judge the axial and circumferential strength of the blade tip, and can evaluate whether the blade strength is qualified in multiple dimensions.

[0095] It can be understood that a blade tip timing sensor and a key phase sensor are installed in the volute of the blower to be tested, and obtaining the maximum axial displacement of the blade tip and the maximum circumferential displacement of the blade tip of the blower to be tested within a preset vibration period includes:

[0096] The blade tip timing sensor and the key phase sensor are used to detect the blade tip axial amplitude change line and the blade tip circumferential amplitude change line of the blower to be tested;

[0097] According to the blade tip axial amplitude variation line and the blade tip circumferential amplitude variation line, the maximum axial displacement of the blade tip and the maximum circumferential displacement of the blade tip of the blower to be tested within a preset vibration period are determined.

[0098] The blade tip timing sensor detects the axial amplitude of the blade tip of the blower to be tested, and the key phase sensor detects the circumferential amplitude of the blade tip of the blower to be tested; the blade tip axial amplitude and the blade tip circumferential amplitude are combined with the time line to draw the axial amplitude change line and the blade tip circumferential amplitude change line, and the highest point in the axial amplitude change line can be determined as the maximum axial displacement of the blade tip, and the highest point in the blade tip circumferential amplitude change line can be determined as the maximum circumferential displacement of the blade tip.

[0099] In the embodiment of the present invention, the blower to be tested is used to be installed on the wind turbine blades of the wind turbine and to de-ice the wind turbine blades. The simulation of the actual operating conditions and the detection of the impeller strength of the impeller 200 include:

[0100] Obtaining the actual installation state of the blower to be tested, and fixing the blower to be tested on a rotating test bench to simulate the actual installation state;

[0101] Acquire actual operating parameters of the wind turbine, determine experimental parameters of the rotating test bench according to the actual operating parameters, and drive the rotating test bench to rotate with equal centrifugal force according to the experimental parameters;

[0102] Controlling the blower to be tested to run at a preset overspeed rate for a preset time, and obtaining the overspeed deformation amount of the blower to be tested;

[0103] The impeller strength is determined based on the amount of overspeed deformation.

[0104] Determine that the rotating plane of the actual operating state of the blower to be tested is perpendicular to the horizontal plane. The actual operating state of the blower to be tested when installed in the wind turbine can be simulated on the rotating plane. The rotating plane is perpendicular to the horizontal plane. According to the formula: F = mω 2 r, obtain the rotation speed of the wind turbine, and convert the rotation radius of the blower to be tested on the rotating test bench during the test into the rotation radius of the rotating test bench actually running in the power generation blades to obtain the rotation speed under the same centrifugal force as the test speed of the rotating test bench, which is used as the experimental parameter; subject the blower to be tested to a speed overspeed test in a vertical plane rotating state, with the running time being not less than 180s, and the preset overspeed rate can be set in advance.

[0105] In the embodiment of the present invention, the overspeed deformation amount at least includes the amount of cracks at the welding points of the impeller 200, the cracks at the anchor nodes, and the diameter deformation amount of the impeller 200. Specifically, the overspeed deformation amount can be obtained by obtaining an initial appearance image before the test, obtaining an overspeed operation image of the blower to be tested in real time during the impeller strength test, and obtaining the overspeed deformation amount of the blower to be tested by comparing the initial appearance image and the final overspeed operation image. After scanning the final overspeed operation image to determine that there are no cracks at the welding points and anchor nodes on the impeller 200 of the blower to be tested, and the diameter deformation amount of the impeller 200 is not higher than 5%, it is considered that the blade strength is qualified.

[0106] In an embodiment of the present invention, controlling the blower to be tested to run at a preset overspeed rate for a preset time, and obtaining the overspeed deformation amount of the blower to be tested includes:

[0107] Acquire an initial appearance image of the blower to be tested before testing;

[0108] Controlling the blower to be tested to run at a preset overspeed rate for a preset time, and obtaining an overspeed appearance image of the blower to be tested;

[0109] The overspeed deformation of the blower to be tested is obtained based on the initial appearance image and the overspeed running image.

[0110] Specifically, the overspeed deformation amount can be obtained by obtaining an initial appearance image before the test, obtaining an overspeed running image of the blower to be tested in real time during the impeller strength test, and obtaining the overspeed deformation amount of the blower to be tested by comparing the initial appearance image and the final overspeed running image. This embodiment fully considers the special working condition of the blower rotating with the wind turbine, and comprehensively examines the static load of the blade and the maximum amplitude operation of the blade tip vibration for a long time under constant centrifugal force and random frequency amplitude vibration environment, and can effectively evaluate the reliability of the impeller 200 of the blower to be tested.

[0111] In this embodiment, the maximum static load of the blade in the direction of centrifugal force is detected to evaluate whether the connection strength meets the standard. Under vibration switching, the blower to be tested is controlled to continuously run at the rated speed, and the vibration of the blade tip is checked to evaluate whether the blade strength meets the standard. On this basis, the blower to be tested is placed on a rotating test platform with a rotating plane perpendicular to the horizontal plane. The impeller 200 is overspeeded and then the impeller strength of the impeller 200 is checked. The reliability of the blower to be tested can be evaluated in multiple dimensions to avoid inaccuracies caused by single-dimensional evaluation.

[0112] The present invention also provides a deicing blower reliability testing system, the deicing blower reliability testing system comprising:

[0113] A tensile testing machine is used to test the connection strength value of the blades and the impeller 200;

[0114] Vibration test bench, used for testing the blade strength value of blades;

[0115] Rotating test bench for testing the impeller strength of the impeller 200;

[0116] The controller, the tensile machine, the vibration test bench, and the rotating test bench are all electrically connected to the controller, and the controller is used to control the tensile machine, the vibration test bench, and the rotating test bench to perform the above-mentioned deicing blower reliability test method. It can be understood that the tensile machine in this embodiment can apply tension to the blower to be tested, the vibration test bench can vibrate the blower to be tested, and the vibration structure in the prior art can be used. The rotating test bench can simulate the actual rotation state of the wind turbine generator and simulate special working conditions for the blower to be tested. The rotating test bench may include a rotating motor, a rotating blade, and a rotating shaft.

[0117] like Figure 2As shown, in one embodiment, the de-icing blower reliability test system also includes a detection fixture 100 for fixing the blower to be tested on a tensile testing machine. The detection fixture 100 may include a fixed disc 1 and a connecting plate 3 connected to the tensile testing machine. The fixed disc 1 includes two limit plates 11. A limit space 12 for limiting the impeller 200 is formed between the two limit plates 11, which can limit the blower to be tested along the axial direction of the rotating shaft 210. The upper end of the connecting plate 3 can be connected to the rotating shaft 210 of the impeller 200, and the lower end can be connected to the tensile testing machine. The number of connecting plates 3 can be two, and the two connecting plates 3 can be arranged relatively along the axial direction of the rotating shaft 210. The structure of the detection fixture 100 is simple and easy to assemble, which can improve the test efficiency.

[0118] In the description of the present invention, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0119] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0120] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0121] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A deicing blower reliability test method, used for a blower to be tested, wherein the blower to be tested comprises an impeller and blades connected to the impeller, characterized in that: The de-icing blower reliability test method comprises: Detecting the connection strength value between the blade and the impeller and obtaining a first threshold value; Determining whether the connection strength between the blade and the impeller meets the standard according to the connection strength value and the first threshold; detecting a blade strength value of the blade and obtaining a second threshold; Determining whether the blade strength of the blade meets the standard according to the blade strength value and the second threshold; When it is determined that the connection strength and the blade strength meet the standards, simulating actual operating conditions and testing the impeller strength of the impeller; Whether the reliability of the blower to be tested meets the standard is determined by combining the connection strength value, the blade strength value and the impeller strength.

2. The de-icing blower reliability testing method according to claim 1, characterized in that: The detecting the connection strength value between the blade and the impeller and obtaining the first threshold value comprises: Acquire an initial appearance image of the blower to be tested before testing; Fixing the blower to be tested on a tensile testing machine, controlling the tensile testing machine to apply a static load to the blades of the blower along the radial direction of the blades, and acquiring a current appearance image of the blower to be tested; Acquire a static load failure value of the blower to be tested according to the initial appearance image and the current appearance image, and use the static load failure value as a connection strength value; A preset static load is obtained as a first threshold.

3. The de-icing blower reliability testing method according to claim 2, characterized in that: The step of obtaining the static load failure value of the blower to be tested according to the initial appearance image and the current appearance image comprises: Comparing the current appearance image with the initial appearance image to obtain a current state of the blower to be tested; The static load failure value of the blower to be tested is determined according to the current state of the blower to be tested.

4. The de-icing blower reliability testing method according to claim 3, characterized in that: Determining the static load failure value of the blower to be tested according to the current state of the blower to be tested includes: It is determined that the blower to be tested is in a static load failure state, the current static load of the tensile machine is obtained, and the current static load is used as a static load failure value.

5. The de-icing blower reliability testing method according to any one of claims 1 to 4, characterized in that: The detecting the blade strength value of the blade and obtaining the second threshold value comprises: Fixing the blower to be tested on a vibration test bench; Obtaining preset vibration parameters and controlling the vibration test bench to perform simulated vibration according to the preset vibration parameters; controlling the blower to be tested to run at a rated speed in a simulated vibration environment to obtain the maximum vibration amplitude of the blade tip of the blower to be tested, and using the maximum vibration amplitude of the blade tip as the blade strength value; A preset blade vibration amplitude of the blade is obtained as a second threshold.

6. The de-icing blower reliability testing method according to claim 5, characterized in that: The steps of obtaining preset vibration parameters and controlling the vibration test bench to perform simulated vibration according to the preset vibration parameters; controlling the blower to be tested to operate at a rated speed in a simulated vibration environment to obtain the maximum vibration amplitude of the blade tip of the blower to be tested, and using the maximum vibration amplitude of the blade tip as the blade strength value include: Controlling the vibration test table to vibrate the blower to be tested along the X-axis, Y-axis, and Z-axis directions at a preset acceleration within a preset vibration frequency range; The maximum axial displacement of the blade tip and the maximum circumferential displacement of the blade tip of the blower to be tested within a preset vibration period are obtained and used as the maximum vibration amplitude of the blade tip.

7. The de-icing blower reliability testing method according to claim 6, characterized in that: A blade tip timing sensor and a key phase sensor are installed in the volute of the blower to be tested, and obtaining the maximum axial displacement of the blade tip and the maximum circumferential displacement of the blade tip of the blower to be tested within a preset vibration period includes: Detecting the blade tip axial amplitude change line and the blade tip circumferential amplitude change line of the blower to be tested by the blade tip timing sensor and the key phase sensor; According to the blade tip axial amplitude variation line and the blade tip circumferential amplitude variation line, the maximum axial displacement of the blade tip and the maximum circumferential displacement of the blade tip of the blower to be tested within a preset vibration period are determined.

8. The de-icing blower reliability testing method according to any one of claims 1 to 4, characterized in that: The blower to be tested is used to be installed on a wind turbine blade of a wind turbine generator and to de-ice the wind turbine blade. The simulating actual operating conditions and detecting the impeller strength of the impeller includes: Acquire the actual installation state of the blower to be tested, and fix the blower to be tested on a rotating test bench by simulating the actual installation state; Acquiring actual operating parameters of the wind turbine, determining experimental parameters of the rotating test bench according to the actual operating parameters, and driving the rotating test bench to rotate with equal centrifugal force according to the experimental parameters; Controlling the blower to be tested to run at a preset overspeed rate for a preset time, and obtaining the overspeed deformation amount of the blower to be tested; The impeller strength is determined according to the overspeed deformation amount.

9. The de-icing blower reliability testing method according to claim 8, characterized in that: The step of controlling the blower to be tested to run at a preset overspeed rate for a preset time and obtaining the overspeed deformation amount of the blower to be tested comprises: Acquire an initial appearance image of the blower to be tested before testing; Controlling the blower to be tested to run at a preset overspeed rate for a preset time, and obtaining an overspeed appearance image of the blower to be tested; The overspeed deformation amount of the blower to be tested is obtained according to the initial appearance image and the overspeed operation image.

10. A de-icing blower reliability test system, characterized in that: The de-icing blower reliability test system comprises: Tensile testing machine, used to test the connection strength of blades and impellers; A vibration test bench, used for testing the blade strength value of the blade; Rotating test bench for testing the impeller strength of the impeller; A controller, wherein the tensile machine, the vibration test bench, and the rotary test bench are all electrically connected to the controller, and the controller is used to execute the deicing blower reliability test method described in any one of claims 1 to 9.

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