Blade tip tension fatigue test tool
By designing a simplified blade tip pull fatigue testing tooling, the problems of complex operation and inflexible space utilization of existing devices are solved, and efficient blade tip pulling tests in limited space are realized, improving the practicality and stability of the test.
Patent Information
- Application Number
- CN202421976558.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-14
- Publication Date
- 2025-07-01
- Estimated Expiration
- 2034-08-14
AI Technical Summary
The existing leaf tip pulling test device is complex in operation, requires professional training, and the space utilization is inflexible, which increases the cost and difficulty of use.
A tip pull fatigue testing tool for the blades including a frame, a tension mechanism and a clamping mechanism is designed. The vertically connected connecting frame and a test bench combines a simplified clamping mechanism and a tensile mechanism to be suitable for testing in a limited space.
It improves the practicality and versatility of the test device, reduces the operation complexity, adapts to different space limitations, and enhances the fixing stability of the blade tip and the reliability of the test.
Smart Images
Figure CN223051038U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of wind turbine blade testing, in particular to a tip tension fatigue testing tooling. Background Art
[0002] As an important part of renewable energy, wind power generation has been widely used globally. As one of the key components of a wind power generation system, the design and performance of wind turbine blades are crucial for the overall efficiency and reliability of the system. The durability of the blades has become one of the key factors restricting their service life. To evaluate the durability of wind turbine blades, especially the fatigue characteristics of the tip part under long-term wind loads, researchers have developed a tip tension testing device. This device simulates wind loads and applies periodic tension forces to test the fatigue performance of the tip to evaluate its life and stability during actual operation.
[0003] Current testing devices usually have complex operation interfaces and control systems, which require trained operators to operate proficiently, increasing the usage cost and learning curve. Advanced testing devices may require a large space for installation, which may pose a challenge for some laboratories or enterprises, increasing the difficulty and cost of using the device.
[0004] Therefore, the current tip tension testing device has certain limitations in terms of operation complexity and space utilization, and needs to be further improved and optimized to enhance its practicality. Summary of the Utility Model
[0005] In view of at least one of the above technical problems, the utility model provides a tip tension fatigue testing tooling, which improves practicality through structural improvement.
[0006] According to a first aspect of the utility model, there is provided a tip tension fatigue testing tooling, comprising:
[0007] A frame, the frame comprising a test bench and a connecting frame vertically connected to the test bench;
[0008] A stretching mechanism, the stretching mechanism being arranged on the connecting frame;
[0009] A clamping mechanism, the clamping mechanism comprising a first clamping component and a second clamping component. One end of the first clamping component is connected to the test bench, and the other end is connected to the tip root. One end of the second clamping component is connected to the tip end, and the other end is connected to the stretching mechanism.
[0010] In some embodiments of the present utility model, the first clamping assembly includes at least one set of fixing members and fastening members. Each set of the fixing members includes two clamping plates, and the two clamping plates are respectively arranged on both sides of the blade tip surface. The fastening members fix the blade tip and the fixing members.
[0011] In some embodiments of the present utility model, a first through hole is formed at the relative position of each set of the clamping plates. The fastening member is a combination of a bolt and a nut. The bolt passes through the first through hole and the blade tip, and the nut is sleeved on the bolt.
[0012] In some embodiments of the present utility model, the shape and surface radian of the clamping plate are similar to those of the blade tip.
[0013] In some embodiments of the present utility model, an anti-slip pad is further provided on one side of the clamping plate close to the blade tip surface.
[0014] In some embodiments of the present utility model, the second clamping assembly includes a connecting block, a first connecting member and a second connecting member. A second through hole and a third through hole are formed in the connecting block. The first connecting member is rotatably connected to the second through hole and the tip of the blade. The second connecting member is arranged perpendicular to the extending direction of the first connecting member. The second connecting member passes through the third through hole and is rotatably connected to the stretching mechanism.
[0015] In some embodiments of the present utility model, a reinforcing ring is further provided at the connection between the first connecting member and the second through hole, and the reinforcing ring is fixedly installed at the second through hole.
[0016] In some embodiments of the present utility model, the stretching mechanism includes a connecting rod connected to the second clamping assembly, an outer tube sleeved outside the connecting rod and fixedly connected to the connecting frame, a transmission assembly for driving the connecting rod and the outer tube to move relatively, and a driving member for driving the connecting rod and the outer tube to rise or fall.
[0017] In some embodiments of the present utility model, a universal conversion head is further provided between the stretching mechanism and the clamping mechanism.
[0018] In some embodiments of the present utility model, the connecting frame includes at least two columns perpendicular to the test bench, and a cross beam whose position can be relatively adjusted between the columns. The cross beam is arranged parallel to the test bench.
[0019] The beneficial effects of the present utility model are as follows: The present utility model conducts a pulling test on the blade tip through a connecting frame and a test bench that are vertically connected, and is suitable for being installed in a limited space, which solves the problem of space limitation that the current test device may face. At the same time, the blade tip is fixed by the first clamping member and the second clamping member in the clamping mechanism, and then the pulling test is carried out on the blade tip through the stretching mechanism. The present utility model improves the practicability of the blade tip pulling test device. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings described below are only some embodiments recorded in the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.
[0021] Figure 1 It is a schematic structural diagram of the blade tip pulling fatigue test tooling in the embodiment of the present utility model;
[0022] Figure 2 It is a schematic structural diagram of the clamping mechanism in the blade tip pulling fatigue test tooling in the embodiment of the present utility model;
[0023] Figure 3 It is a side view of the clamping mechanism in the blade tip pulling fatigue test tooling in the embodiment of the present utility model;
[0024] Figure 4 In the embodiment of the present utility model Figure 3 It is a sectional view taken along the line A - A;
[0025] Figure 5 It is an exploded view of the clamping mechanism in the blade tip pulling fatigue test tooling in the embodiment of the present utility model;
[0026] Figure 6 It is a side view of the stretching mechanism in the blade tip pulling fatigue test tooling in the embodiment of the present utility model;
[0027] Figure 7 In the embodiment of the present utility model Figure 6 It is a sectional view taken along the line B - B. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0028] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model with reference to 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.
[0029] It should be noted that when an element is referred to as "fixed to" another element, it can be directly on the other element or there may also be an intermediate element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only implementation.
[0030] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field to which this utility model belongs. The terms used in the description of this utility model are only for the purpose of describing specific embodiments and are not intended to limit this utility model. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.
[0031] As Figures 1 to 7 shown in the tip 1 pull - pull fatigue test tooling, which includes: a frame 2, a stretching mechanism 3 and a clamping mechanism 4.
[0032] The frame 2 includes a test bench 21 and a connecting frame 22 vertically connected to the test bench 21;
[0033] The stretching mechanism 3 is arranged on the connecting frame 22;
[0034] The clamping mechanism 4 includes a first clamping assembly 41 and a second clamping assembly 42. One end of the first clamping assembly 41 is connected to the test bench 21, and the other end is connected to the root of the tip 1. One end of the second clamping assembly 42 is connected to the tip of the tip 1, and the other end is connected to the stretching mechanism 3.
[0035] As Figure 1 shown, the utility model conducts a pull - pull test on the tip 1 through the vertically connected connecting frame 22 and test bench 21, the stretching mechanism 3 arranged on the connecting frame 22, and the clamping mechanism 4 fixedly connected to the test bench 21. The tip 1 is fixed by the first clamping member and the second clamping member in the clamping mechanism 4, and then the stretching mechanism 3 conducts a pull - pull test on the tip 1, improving the practicability of the tip 1 pull - pull test device of the utility model.
[0036] In some embodiments of the utility model, the first clamping assembly 41 includes at least one group of fixing members 41a and fastening members 41b. Each group of fixing members 41a includes two clamping plates 41a1, and the two clamping plates 41a1 are respectively arranged on both sides of the surface of the tip 1, and the fastening members 41b fix the tip 1 and the fixing members 41a. As Figures 2 to 5As shown, by setting the first clamping component 41 to have a combination of a fixing member 41a and a fastening member 41b, and the setting of the clamping plate 41a1, the blade tip 1 can be better fixed and the accuracy and stability during the test can be ensured. At the same time, by arranging the clamping plates 41a1 on both sides of the surface of the blade tip 1, the contact area between the blade tip 1 and the clamping component can be increased, thereby improving the firmness and stability between the clamping mechanism 4 and the blade. It should be noted here that the number of the fixing member 41a and the fastening member 41b can have multiple groups and be evenly distributed to more evenly distribute the tensile force and reduce the deformation or damage caused by uneven stress on the blade tip 1. It should also be noted that there are many forms of the fastening member 41b, which can be a combination of a screw and a nut 41b2, or a fixing form of a pin or a rivet.
[0037] Through the above setting of the first clamping component 41, in order to make the connection between the clamping plate 41a1 and the blade more stable, a first through hole 41a2 is provided at the relative position of each group of clamping plates 41a1. The fastening member 41b is a combination of a bolt 41b1 and a nut 41b2. The bolt 41b1 passes through the first through hole 41a2 and the blade tip 1, and the nut 41b2 is sleeved on the bolt 41b1. Continuing as Figures 2 to 5 shown, the combination of the bolt 41b1 and the nut 41b2 provides a reliable connection method, which can firmly fix the clamping plate 41a1 and the blade tip 1, ensuring the stability and safety during the test. The combination of the bolt 41b1 and the nut 41b2 is relatively simple, easy to install and disassemble, and is suitable for situations that require frequent adjustment or replacement. The first through hole 41a2 on the clamping plate 41a1 allows the position of the bolt 41b1 to be adjusted within a certain range to adapt to different types and sizes of blade tips 1, enhancing the versatility and applicability of the test device.
[0038] As Figure 4 、 Figure 5 shown, the shape and surface curvature of the clamping plate 41a1 are similar to those of the blade tip 1. The similarity in shape between the clamping plate 41a1 and the blade tip 1 can better fit the curved surface of the blade tip 1, improve the stability and firmness of the clamping of the blade by the clamping plate 41a1, reduce the stress concentration during the stretching process, which helps to improve the clamping effect on the one hand and reduce the risk of tearing or breaking of the through hole by the fastening member 41b under the action of stress on the other hand.
[0039] To increase the friction between the clamping plate 41a1 and the blade and make the clamping process more stable, the side of the clamping plate 41a1 close to the surface of the blade tip 1 also has an anti-slip pad 41a3. The anti-slip pad 41a3 on the side of the clamping plate 41a1 close to the surface of the blade tip 1 can increase the friction between the clamping plate 41a1 and the blade tip 1, prevent the clamping plate 41a1 from sliding or shifting when stressed, and improve the safety and reliability of clamping. Such an optimized solution takes into account the contact method between the clamping plate 41a1 and the blade tip 1, which helps to improve the clamping effect. It is necessary to ensure that the material and design of the anti-slip pad 41a3 can effectively increase the clamping friction, and reasonably design the shape and size of the clamping plate 41a1 to ensure the stability and reliability of clamping.
[0040] The second clamping assembly 42 is arranged between the tip of the blade tip 1 and the stretching mechanism 3, as Figures 2 to 5 shown. The second clamping assembly 42 includes a connecting block 42a, a first connecting member 42b and a second connecting member 42c. The connecting block 42a is provided with a second through hole 42a1 and a third through hole 42a2. The first connecting member 42b is rotatably connected to the second through hole 42a1 and the tip of the blade tip 1. The second connecting member 42c is arranged perpendicular to the extending direction of the first connecting member 42b. The second connecting member 42c passes through the third through hole 42a2 and is rotatably connected to the stretching mechanism 3. By providing the second through hole 42a1 and the third through hole 42a2 on the connecting block 42a, the connection with the blade tip 1 and the stretching mechanism 3 can be realized, and the firmness and stability of the connection can be ensured. The first connecting member 42b is rotatably connected to the second through hole 42a1 on the connecting block 42a and the tip of the blade tip 1, which can make the connection more compact, reduce the gap between the connecting members, and also improve the stability and reliability of the connection. The second connecting member 42c is arranged perpendicular to the first connecting member 42b and passes through the third through hole 42a2 on the connecting block 42a and is rotatably connected to the stretching mechanism 3, making the connection between the stretching mechanism 3 and the blade tip 1 more flexible, and the position and angle of the connection can be adjusted as needed. Through the structure and layout of the connecting block 42a, the first connecting member 42b and the second connecting member 42c, the connection is made more stable and flexible, and it can adapt to different types and sizes of blade tips 1 and stretching mechanisms 3, thereby improving the versatility and applicability of the entire testing device.
[0041] When the second clamping assembly 42 is connected to the blade, at the connection between the first connecting member 42b and the second through hole 42a1 of the second clamping assembly 42 for the blade, there is also a reinforcing ring 42b1, and the reinforcing ring 42b1 is fixedly installed at the second through hole 42a1. As Figure 5As shown, the reinforcement ring 42b1 can provide additional support and reinforcement around the through hole of the blade tip 1, disperse the force, reduce stress concentration, enhance the strength and stability of the through hole of the blade tip 1, and reduce the risk of cracks or tears around the through hole. At the same time, it can also protect the surface of the blade tip 1 from friction and damage during the stretching process, and extend the service life of the blade tip 1. To ensure that it does not move or loosen during the test, the reinforcement ring 42b1 is installed to fit the surface of the blade tip 1 tightly and is firmly fixed. Protecting the through hole of the blade tip 1 by adding the reinforcement ring 42b1 is an effective reinforcement measure, which can improve the stability and safety of the blade tip 1 during the stretching process and reduce the risk of cracks or tears.
[0042] The stretching mechanism 3 applies a pulling force to the blades, and the stretching mechanism 3 includes a connecting rod 31 connected to the second clamping assembly 42, an outer tube 32 sleeved outside the connecting rod 31 and fixedly connected to the connecting frame 22, a transmission assembly 33 that drives the connecting rod 31 and the outer tube 32 to move relative to each other, and a driving member 34 for driving the connecting rod 31 and the outer tube 32 to rise or fall. Figure 6 , Figure 7 As shown, the transmission assembly 33 is a component used to drive the relative movement of the connecting rod 31 and the outer tube 32. It should be pointed out here that the transmission assembly 33 also has many forms, which can be a threaded shaft, a hydraulic cylinder, a pneumatic cylinder or an electric motor, etc., to control the movement of the stretching mechanism 3 and adjust the magnitude of the pulling force. The driving member 34 is used to drive the connecting rod 31 and the outer tube 32 to rise or fall, and is connected to the transmission assembly 33. By controlling the movement of the driving member 34, the relative movement of the connecting rod 31 and the outer tube 32 can be achieved, thereby achieving the stretching or release of the blades. It should also be pointed out here that the driving member 34 can be a hydraulic cylinder, a pneumatic cylinder, an electric motor or other devices that can provide push-pull forces.
[0043] like Figure 6 , Figure 7 As shown, there is also a universal conversion head 5 between the stretching mechanism 3 and the clamping mechanism 4. The universal conversion head 5 can make the connection between the stretching mechanism 3 and the clamping mechanism 4 more flexible, and can be rotated and adjusted in different directions, so that the blade can move more freely during the test process, adapt to blades of different angles and postures, and at the same time can reduce stress concentration at the connection point, thereby reducing the risk of damage to the blade at the connection point, and can also make the force at the connection point more uniform, improve the stability and reliability of the connection, and the universal conversion head 5 can reduce the torsion and deformation of the connection, thereby improving the safety during the test process, and it can reduce the possibility of accidents caused by unstable or poor connection.
[0044] In some embodiments of the present invention, Figure 1As shown, the connecting frame 22 includes at least two columns 22a perpendicular to the test bench 21, and a cross beam 22b whose position can be relatively adjusted and is arranged between the columns 22a. The cross beam 22b is arranged parallel to the test bench 21. The columns 22a are the support structure of the connecting frame 22, usually vertical columnar components perpendicular to the test bench 21. The number of columns 22a is at least two, and their function is to provide vertical support and stability to support the cross beam 22b and the stretching mechanism 3 connected thereto. The position of the cross beam 22b can be adjusted to adapt to different sizes or types of test samples as needed. The cross beam 22b plays a role of connection and support, and can bear the weight of components such as the stretching mechanism 3 and the blade tip 1, and keep them in appropriate positions.
[0045] Those skilled in the art should understand that the present utility model is not limited by the above embodiments. What is described in the above embodiments and the specification only illustrates the principle of the present utility model. Without departing from the spirit and scope of the present utility model, the present utility model will have various changes and improvements, and these changes and improvements all fall within the scope of the present utility model claimed. The scope of protection claimed by the present utility model is defined by the appended claims and their equivalents.
Claims
1. A blade tip tensile fatigue test tool, characterized in that: include: A frame, the frame comprising a test bench and a connecting frame vertically connected to the test bench; A stretching mechanism, wherein the stretching mechanism is arranged on the connecting frame; The clamping mechanism comprises a first clamping assembly and a second clamping assembly, wherein one end of the first clamping assembly is connected to the test bench and the other end is connected to the root of the blade tip, and one end of the second clamping assembly is connected to the tip of the blade tip and the other end is connected to the stretching mechanism.
2. The blade tip tensile fatigue test fixture according to claim 1, characterized in that: The first clamping assembly includes at least one group of fixing members and fasteners, each group of the fixing members includes two clamping plates, the two clamping plates are respectively arranged on both sides of the blade tip surface, and the fasteners fix the blade tip and the fixing members.
3. The blade tip tensile fatigue test fixture according to claim 2, characterized in that: A first through hole is provided at a relative position of each group of the clamping plates, and the fastener is a combination of a bolt and a nut. The bolt passes through the first through hole and the blade tip, and the nut is sleeved on the bolt.
4. The blade tip tensile fatigue test fixture according to claim 2, characterized in that: The clamping plate has a similar surface curvature to the blade tip.
5. The blade tip tensile fatigue test fixture according to claim 2, characterized in that: The side of the clamping plate close to the blade tip surface is also provided with an anti-slip pad.
6. The blade tip tensile fatigue test fixture according to claim 1, characterized in that: The second clamping assembly includes a connecting block, a first connecting member and a second connecting member. The connecting block is provided with a second through hole and a third through hole. The first connecting member is rotatably connected to the second through hole and the tip of the blade tip. The second connecting member is arranged perpendicular to the extension direction of the first connecting member. The second connecting member passes through the third through hole and is rotatably connected to the stretching mechanism.
7. The blade tip tensile fatigue test fixture according to claim 6, characterized in that: A reinforcement ring is also provided at the connection between the first connecting member and the second through hole, and the reinforcement ring is fixedly installed at the second through hole.
8. The blade tip tensile fatigue test fixture according to claim 1, characterized in that: The stretching mechanism includes a connecting rod connected to the second clamping assembly, an outer tube sleeved outside the connecting rod and fixedly connected to the connecting frame, a transmission assembly that drives the connecting rod and the outer tube to move relative to each other, and a driving member for driving the connecting rod and the outer tube to rise or fall.
9. The blade tip tensile fatigue test fixture according to claim 1, characterized in that: A universal conversion head is also provided between the stretching mechanism and the clamping mechanism.
10. The blade tip tensile fatigue test fixture according to claim 1, characterized in that: The connecting frame includes at least two columns perpendicular to the test bench, and a crossbeam which is arranged between the columns and can be relatively adjusted in position, and the crossbeam is arranged parallel to the test bench.