Fan support strength test bench
By designing the fan bracket strength test bench, the hydraulic cylinder and pressure head are used to simulate the stress under actual working conditions, the deviation problem between the stress design simulation results and actual tests in the prior art is solved, and more accurate stress performance testing is achieved.
Patent Information
- Application Number
- CN202422232183.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-12
- Publication Date
- 2025-06-24
- Estimated Expiration
- 2034-09-12
AI Technical Summary
The prior art has a deviation between simulation results and actual tests in the stress design of fan brackets, which cannot accurately reflect the strength of the bracket under actual working conditions.
A fan bracket strength test bench was designed, including a base, control and monitoring system, support frame, hydraulic cylinder and pressure head. The hydraulic cylinder presses the support to measure its feedback resistance, and monitor and form a stress performance test report in real time.
It realizes a more accurate test of the stress performance of the fan bracket, reduces the deviation between the simulation results and the actual test, and improves the accuracy and reliability of the test.
Smart Images
Figure CN223021520U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of fan bracket strength testing, in particular to a fan bracket strength testing platform. Background Technique
[0002] The fan bracket is the base of the fan tower barrel, bearing the full weight of the fan and shouldering all the stress conditions such as support, earthquake resistance, and strong wind resistance. The firmness and durability of the fan bracket play a key role in the safe and stable operation of the fan, directly determining the "life and death" of a fan. In mechanical design, stress design is an important link to ensure the strength and reliability of mechanical parts. By analyzing and calculating the stress of mechanical parts, the maximum and minimum stresses that they can withstand during operation can be determined, thus avoiding failures and damages caused by excessive stress. In addition, stress design can also guide the material selection and manufacturing process of fan bracket parts, improving the performance and quality of the bracket. Therefore, stress design occupies an important position in bracket design.
[0003] The existing technology uses software to simulate the three-dimensional drawing of the bracket, inputs the part material, and inputs the magnitude of the torque to simulate and obtain the stress report of the bracket. Due to work hardening occurring during welding or bending of the bracket, which cannot be reflected in the software simulation, there will be a certain amount of deviation. In order to truly reflect the magnitude of the strength borne by the bracket, we designed this fan bracket strength testing platform to truly test the magnitude of the bracket strength. Content of the Utility Model
[0004] (I) Technical Problems to be Solved
[0005] To solve the above problems existing in the prior art, the utility model provides a fan bracket strength testing platform, which has the advantages of simple structure, low manufacturing cost, convenient installation and adjustment, and more accurate stress performance test and analysis of the bracket.
[0006] (II) Technical Solution
[0007] To achieve the purpose of simple structure, low manufacturing cost, convenient installation and adjustment, and more accurate stress performance test and analysis of the bracket, the utility model provides the following technical solution: a fan bracket strength testing platform, including a base, a control and monitoring system is installed at the upper edge of the base, support frames are symmetrically arranged at the center of the base, a circular disc is installed at the upper end of the support frames, a circular hole is opened at the center of the circular disc, a fixing frame is detachably installed on the base, a hydraulic cylinder is fixed on the fixing frame, and the central axis of the hydraulic cylinder is aligned with the axis of the circular hole.
[0008] Preferably, a limiting frame is installed outside the hydraulic cylinder.
[0009] Preferably, a hydraulic rod is connected and arranged below the hydraulic cylinder.
[0010] Preferably, a pressure head is detachably installed at the end of the hydraulic rod.
[0011] Preferably, fixing rods are arranged on both sides of the upper end of the fixing frame.
[0012] Preferably, the hydraulic cylinder is fixed on the fixing frame by bolts and nuts, and the fixing frame is fixed on the base by bolts and nuts.
[0013] Preferably, there are four support frames, which are symmetrically installed on the base.
[0014] (III) Beneficial effects
[0015] Compared with the prior art, the present utility model provides a strength test bench for a fan bracket, which has the following beneficial effects:
[0016] In this strength test bench for a fan bracket, by inputting variables into the control and monitoring system, the control system transmits signals to the hydraulic cylinder. The hydraulic cylinder works to drive the pressure head to press down to the central circular hole of the circular disk below the bracket. While the hydraulic cylinder presses down, the bracket feedbacks an upward anti-bending ability. The pressure head converts the feedback force into data and transmits it to the control and monitoring system, and the control and monitoring system forms a report. The mechanical structure of the present utility model is simple, the manufacturing cost is low, the installation and adjustment are convenient, and the stress performance test and analysis of the bracket are more accurate. Description of the drawings
[0017] Figure 1 is the overall structure schematic diagram of the present utility model;
[0018] Figure 2 is the front view of the overall structure of the present utility model.
[0019] In the figure: 1, base; 2, hydraulic cylinder; 21, hydraulic rod; 22, pressure head; 23, limit frame; 3, fixing frame; 31, fixing rod; 4, bracket; 5, circular disk; 51, circular hole; 52, support frame; 6, control and monitoring system. Specific embodiments
[0020] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.
[0021] Such as Figure 1 and Figure 2As shown in the figure, a strength test bench for a fan bracket 4 includes a base 1. A control and monitoring system 6 is installed at the upper edge of the base 1. Support frames 52 are symmetrically arranged at the center of the base 1. A circular disk 5 is installed at the upper end of the support frames 52. A circular hole 51 is opened at the center of the circular disk 5. A fixing frame 3 is detachably installed on the base 1. A hydraulic cylinder 2 is fixed on the fixing frame 3. The central axis of the hydraulic cylinder 2 is aligned with the axis of the circular hole 51. The support frames 52 symmetrically arranged at the center of the base 1 ensure that the fan bracket 4 is evenly stressed during the test, avoiding test errors caused by eccentric loading. The circular hole 51 opened at the center of the circular disk 5 is aligned with the central axis of the hydraulic cylinder 2. This design enables the hydraulic cylinder 2 to accurately apply force to the fan bracket 4, simulating the stress conditions under actual working conditions. The hydraulic cylinder 2, as a force-applying device, has its central axis aligned with the axis of the circular hole 51, ensuring the accurate transmission of force and being able to load the fan bracket 4 according to a preset loading curve, thereby simulating the stress conditions under different working conditions. The design of the fixing frame 3 makes the installation and disassembly of the hydraulic cylinder 2 convenient and fast, facilitating the replacement of hydraulic cylinders 2 of different specifications or types according to test requirements. The control and monitoring system 6 installed at the upper edge of the base 1 can real-time monitor various parameters during the test, such as loading force, displacement, strain, etc., providing a strong guarantee for the accuracy of the test results. By integrating advanced control technology and data processing technology, this test bench can realize the automatic progress of the test, reducing manual intervention and improving the test efficiency and accuracy. The overall structure is reasonably designed, and key components such as the support frames 52 and the base 1 are made of high-strength materials, ensuring the stability and safety during the test process.
[0022] As Figure 1As shown, in an embodiment of the present utility model, a limit frame 23 is installed outside the hydraulic cylinder 2; a hydraulic rod 21 is connected and arranged below the hydraulic cylinder 2; a pressure head 22 is detachably installed at the end of the hydraulic rod 21. The main function of the limit frame 23 is to limit the movement range of the hydraulic cylinder 2 during the telescopic process, preventing it from being damaged due to excessive movement. This helps to protect key components such as the seals and cylinder body of the hydraulic cylinder 2 and extend its service life; by limiting the movement range of the hydraulic cylinder 2, the limit frame 23 can also ensure that the hydraulic cylinder 2 moves along a predetermined path and distance during the test, thus avoiding test errors caused by the deviation of the movement trajectory. The hydraulic rod 21 is a connecting bridge between the hydraulic cylinder 2 and the test object (such as a fan bracket). When the hydraulic cylinder 2 is subjected to pressure, it transmits the force to the test object through the hydraulic rod 21, thus simulating the force-bearing situation under actual working conditions. The design of the hydraulic rod 21 enables the force to be applied evenly and stably to the test object, thereby achieving precise loading. This is crucial for evaluating the strength performance of the test object. The pressure head 22 is the direct contact point between the hydraulic rod 21 and the test object. It is responsible for directly applying the force transmitted by the hydraulic rod 21 to the test object, ensuring that the force can be accurately and effectively transmitted. According to the different shapes and sizes of the test objects, the pressure head 22 can be designed into different shapes and sizes to meet different test requirements. This helps to ensure the smooth progress of the test process and the accuracy of the test results.
[0023] In summary, the limit frame 23 outside the hydraulic cylinder 2, the hydraulic rod 21 below the hydraulic cylinder 2, and the pressure head 22 at the end of the hydraulic rod 21 each play an important role in the strength test bench of the fan bracket 4. They work together to ensure the smooth progress of the test process and the accuracy of the test results.
[0024] As Figure 2 shown, in an embodiment of the present utility model, fixing rods 31 are arranged on both sides of the upper end of the fixing frame 3; the fixing rods 31 firmly fix the hydraulic cylinder 2 on the fixing frame 3 through fastening devices (such as bolts, nuts, etc.), preventing the hydraulic cylinder 2 from shaking or shifting during the test. This helps to ensure that the hydraulic cylinder 2 can move along a predetermined path and distance, thus maintaining the stability of the test process. During the test, the hydraulic cylinder 2 will be subjected to a large amount of pressure. The design of the fixing rods 31 can disperse this part of the stress to both sides of the fixing frame 3, avoiding damage caused by stress concentration and further enhancing the stability of the test bench. The setting of the fixing rods 31 helps to ensure the precise alignment between the hydraulic cylinder 2 and the test object (such as the fan bracket 4). This means that the hydraulic cylinder 2 can accurately apply force to the designated position of the test object, thus avoiding test errors caused by position deviation. The combination of the stable fixing frame 3 and the hydraulic cylinder 2 can reduce interference caused by external factors such as vibration and shaking during the test, ensuring the accuracy and reliability of the test data.
[0025] As Figure 1 shown, in an embodiment of the present utility model, the hydraulic cylinder 2 is fixed on the fixing frame 3 by bolts and nuts, and the fixing frame 3 is fixed on the base 1 by bolts and nuts; as one of the core components of the test bench, the stability of the hydraulic cylinder 2 is crucial for the accuracy of the test results. Fixing the hydraulic cylinder 2 firmly on the fixing frame 3 by bolts and nuts can prevent the hydraulic cylinder 2 from displacing or shaking during the test, ensuring that the force can be transmitted to the test object stably and accurately; similarly, as the component for supporting and fixing the hydraulic cylinder 2, the stability of the fixing frame 3 also directly affects the overall performance of the test bench. Fixing the fixing frame 3 on the base 1 by bolts and nuts can ensure that the fixing frame 3 remains stable during the test and will not deform or displace due to the force; the connection method of bolts and nuts enables a modular design among the hydraulic cylinder 2, the fixing frame 3, and the base 1. This design facilitates the replacement or adjustment of components during installation and disassembly, improving the flexibility and maintainability of the test bench.
[0026] As Figure 1 shown, in an embodiment of the present utility model, there are four support frames 52 in total, which are symmetrically installed on the base 1; the four support frames 52 are symmetrically distributed, which can ensure that when the test bench is subjected to the force exerted by the hydraulic cylinder 2, the force is evenly distributed on the entire base 1. This uniform force helps to reduce deformation or damage caused by stress concentration, thereby enhancing the overall stability of the test bench; the symmetric layout enables the test bench to generate counteracting torques when subjected to lateral forces or torques, effectively resisting overturning. This is crucial for ensuring that the test bench remains stable and does not shake during the test; the stable structure of the support frame 52 can reduce the interference caused by vibration during the test. Vibration is one of the common interference factors during the test, which may lead to inaccurate test data. By adopting four symmetric support frames 52, the vibration level during the test can be significantly reduced, thereby improving the test accuracy; the stability and accuracy of the support frame 52 also directly affect the alignment accuracy between the test object (such as a fan bracket) and the hydraulic cylinder 2. The symmetric layout helps to ensure that the test object can be accurately and stably placed on the test bench and maintain the correct relative position with the hydraulic cylinder 2, thereby ensuring the accuracy of the test results.
[0027] Working principle: The present invention simulates the downward pressure brought by the motor fan blade to the bracket 4 through the downward pressure of the hydraulic cylinder 2 once, and the upward resistance of the bracket 4 is detected by the pressure head 22 and fed back to the system to obtain a more accurate value.
[0028] Deformation analysis of the support 4: elastic stage, yield stage, strengthening stage, and local deformation stage. There are obvious yield and necking phenomena in the local deformation stage. At the beginning, it is the elastic stage, completely following Hooke's law and rising linearly. After the proportional limit, the deformation accelerates, but there is no obvious yield stage.
[0029] 1. Elastic stage: In this stage, the deformation of the support 4 is completely elastic. After all the loads are removed, the specimen will return to its original state. The elastic modulus of the support 4 can be measured in this stage.
[0030] 2. Yield stage: The deformation of the support 4 increases sharply, while the load reading on the strength test bench of the fan support 4 fluctuates within a very small range. If the slight fluctuations in the load reading are ignored.
[0031] 3. Strengthening stage: After the support 4 passes through the yield stage, if it is to be deformed continuously, due to the continuous strengthening of the material during plastic deformation, the resistance in the specimen increases continuously.
[0032] 4. Necking stage and fracture: After the support 4 reaches a certain degree, the load reading gradually decreases instead.
[0033] At the same time, variables are set to simulate the stress conditions in special situations such as earthquake resistance and strong wind resistance through multiple downward presses; the variables are input into the control and monitoring system 6, the control system signal is transmitted to the hydraulic cylinder 2, the hydraulic cylinder 2 works to drive the pressure head 22 to press down to the center hole 51 of the lower ring plate 5 of the support 4. While the hydraulic cylinder 2 presses down, the support 4 feedbacks an upward bending resistance, and the pressure head 22 converts the feedback force into data and transmits it to the control and monitoring system 6, and the control and monitoring system 6 forms a report;
[0034] In summary, for the strength test bench of the fan bracket 4, there are a total of four support frames 52, which are symmetrically installed at the center on the base 1. This layout can ensure that when the test bench is subjected to the force applied by the hydraulic cylinder 2, the force is evenly distributed, reducing stress concentration, thereby enhancing the overall stability of the test bench. A stable support structure is the basis for ensuring the accuracy of test data; the hydraulic cylinder 2 is fixed to the fixing frame 3 through bolts and nuts, and the fixing frame 3 is also firmly fixed to the base 1 through bolts and nuts. This connection method not only ensures the stability of the hydraulic cylinder 2 during the test, but also facilitates installation, disassembly, and maintenance; the central axis of the hydraulic cylinder 2 is aligned with the axis of the central circular hole 51 of the circular disk 5, ensuring that the test force can act accurately and stably on the fan bracket 4 to be tested, improving the accuracy of the test; a limit frame 23 is installed outside the hydraulic cylinder 2, which can effectively prevent the hydraulic cylinder 2 from undergoing excessive displacement or damage during the test, increasing the safety of the test process; a pressure head 22 is provided at the end of the hydraulic rod 21, which can transfer the test force to the fan bracket 4 more directly and effectively, and at the same time, it is convenient to adjust the shape and size of the pressure head 22 according to the test requirements; a control and monitoring system 6 is installed at the upper edge of the base 1, which can monitor various parameters during the test in real time, such as pressure, displacement, etc., to ensure that the test process is carried out within a controllable range; the fixing frame 3 is designed to be detachable, facilitating the replacement of hydraulic cylinders 2 of different specifications or types according to the test requirements, improving the flexibility and adaptability of the test bench; fixing rods 31 are provided on both sides of the upper end of the fixing frame 3. These fixing rods 31 can be used to further strengthen the connection between the fixing frame 3 and the base 1, and can also be used as installation points for other accessories or equipment, increasing the expandability of the test bench.
[0035] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "comprising an..." does not exclude the presence of additional identical elements in the process, method, article or device comprising the element.
[0036] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.
Claims
1. A fan support strength test bench, characterized in that: The invention comprises a base (1), a control monitoring system (6) is installed at the upper edge of the base (1), a support frame (52) is centrally symmetrically arranged on the base (1), a circular ring disk (5) is installed at the upper end of the support frame (52), a circular hole (51) is opened at the center of the circular ring disk (5), a fixing frame (3) is detachably installed on the base (1), a hydraulic cylinder (2) is fixed on the fixing frame (3), and the central axis of the hydraulic cylinder (2) is aligned with the axis of the circular hole (51).
2. A wind turbine support strength test bench according to claim 1, characterized in that: A limiting frame (23) is installed outside the hydraulic cylinder (2).
3. A wind turbine support strength test bench according to claim 2, characterized in that: A hydraulic rod (21) is connected and arranged below the hydraulic cylinder (2).
4. A wind turbine support strength test bench according to claim 3, characterized in that: A pressure head (22) is detachably mounted on the end of the hydraulic rod (21).
5. The wind turbine support strength test bench according to claim 1, characterized in that: Fixing rods (31) are provided on both sides of the upper end of the fixing frame (3).
6. A wind turbine support strength test bench according to claim 1, characterized in that: The hydraulic cylinder (2) is fixed to the fixing frame (3) by means of bolts and nuts, and the fixing frame (3) is fixed to the base (1) by means of bolts and nuts.
7. The wind turbine support strength test bench according to claim 1, characterized in that: There are four support frames (52) in total, which are mounted on the base (1) in a centrally symmetrical manner.