Engine fan support bearing performance testing device

Abstract

The invention discloses an engine fan support bearing performance testing device. The engine fan support bearing performance testing device comprises a base, a power output assembly, a radial loading assembly, a test piece supporting assembly, an axial loading assembly, a bending moment loading assembly and the like, the power output assembly drives an output shaft, the radial loading assembly applies a radial force to a tested piece through a belt, a radial electric cylinder and the like, the bending moment loading assembly applies a bending moment force to an axial long test piece, the axial loading assembly applies an axial force, the spray test assembly can simulate severe working conditions of muddy water, and each working condition is monitored by a corresponding sensor; the heating assembly is combined with a heat-conducting plate through a heating rod to reduce heat loss and transfer heat efficiently. The device can simulate engine working conditions in multiple directions, accurately simulate vibration, stress, heating, muddy water and other conditions, comprehensively obtain performance data, approach real working conditions and enhance data integrity.

Description

Technical Field

[0001] The present invention relates to the technical field of testing equipment, in particular to a performance testing device for an engine fan bracket bearing. Background Art

[0002] During engine operation, the fan support bearings located at the front end of the engine are exposed to a complex multi-physics field of vibration, temperature, and alternating forces. To study the performance of fan support bearings, physical experiments are conducted to simulate engine operating inputs. In actual operating conditions, different engine models produce different output frequencies and induce different bearing vibration amplitudes. Bearing vibration simulation is typically achieved using an exciter, but the difficulty lies in selecting the exciter's installation location and generating the excitation amplitude.

[0003] However, in existing experimental research, the effect of using a temperature control box to simulate engine temperature is not ideal. The reason is that the heat loss of existing industrial heaters through air heat transfer is large, and due to the size limitation of the vibration test bench, its versatility is poor, making it difficult to perform vibration tests on engine fans and bracket bearings of different sizes. Even if the test can be carried out, it is very troublesome to remove the engine fan and bracket bearings from the vibration test bench. Therefore, in order to get as close as possible to the actual working conditions of the fan bracket bearings, a device is needed that is easy to disassemble and assemble and can perform multi-directional performance tests on engine fans and bracket bearings of different models. Summary of the Invention

[0004] The object of the present invention is to provide an engine fan bracket bearing performance testing device to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned object, the present invention provides the following technical solution: an engine fan bracket bearing performance testing device, comprising a base, on which is fixedly provided: A power output assembly, used to output power to the test piece, wherein the power output assembly is provided with a torque sensor; A radial loading assembly, used for applying radial force to the test piece, wherein the radial loading assembly is provided with a radial force sensor; A specimen support assembly is used to support the specimen, wherein a heating assembly is provided in the specimen support assembly; The axial loading assembly is used to load the test piece with axial force, and an axial force sensor is provided in the axial loading assembly.

[0006] A support platform is fixedly provided on the base, and the support platform and the base are fixedly connected via a plurality of buffer pads. The specimen support assembly, bending moment loading assembly, radial loading assembly and axial loading assembly are all fixedly provided on the support platform, and an exciter is also provided in the specimen support assembly.

[0007] Preferably, the power output assembly includes a drive motor, a torque sensor and a plurality of bearing seats fixedly arranged on a base, wherein output shafts are rotatably arranged in the plurality of bearing seats; The shaft of the driving motor is fixedly connected to the torque sensor shaft, the other end of the torque sensor shaft is fixedly connected to the output shaft, and the other end of the output shaft is fixedly provided with a driving pulley.

[0008] Preferably, a radial bending platform is fixedly provided on the support platform, and the radial loading assembly includes a plurality of first linear modules fixedly provided on the radial bending platform, a first pad is fixedly provided on the slider of the first linear module, a radial shaft is rotatably provided on the first pad, one end of the radial shaft is fixedly provided with a radial pulley, the other end of the radial shaft is fixedly provided with a driven pulley, and a belt is provided between the driven pulley and the driving pulley; A detachable belt is also provided between the radial pulley and the rotating test piece; The radial bending platform is also fixedly provided with a radial loading electric cylinder, and the movable end of the radial loading electric cylinder is fixedly connected to the first pad; The radial force sensor is fixedly arranged between the first pad and the movable end of the radial loading electric cylinder.

[0009] Preferably, it further comprises a bending moment loading component for performing bending moment loading on the test piece; The bending moment loading assembly includes a plurality of second linear modules fixedly arranged on the radial bending platform, a second pad fixedly arranged on the sliders of the plurality of second linear modules, a bending moment shaft rotatably arranged on the second pad, a bending moment pulley fixedly sleeved on the bending moment shaft, and a detachable belt sleeved between the bending moment pulley and the rotating test piece; A bending moment loading electric cylinder is fixedly provided on the radial bending platform, and a movable end of the bending moment loading electric cylinder is fixedly connected to the second pad; A bending moment sensor is provided in the bending moment loading assembly, and the bending moment sensor is fixedly arranged between the second pad and the movable end of the bending moment loading electric cylinder.

[0010] Preferably, the axial loading assembly includes an axial bracket fixedly arranged on the support platform, a plurality of third linear modules are fixedly arranged on the axial bracket, a third pad is fixedly arranged on the sliders of the plurality of third linear modules, an axial shaft is movably arranged on the third pad, the axial shaft passes through the heat conducting plate, and one end of the axial shaft contacts the test piece during operation; An axial loading electric cylinder is fixedly provided on the axial bracket, and a movable end of the axial loading electric cylinder is fixedly connected to the third pad; The axial force sensor is fixedly arranged between the third pad and the movable end of the axial loading electric cylinder.

[0011] Preferably, the specimen support assembly includes a specimen support frame fixedly arranged on the support table, and the heating assembly is fixedly arranged on the specimen support frame; The heating assembly includes a heat conducting plate fixedly arranged on the specimen support frame, a heat insulating pad is arranged between the contact surface of the specimen support frame and the heat conducting plate, a plurality of heating rods are fixedly arranged on the heat conducting plate, and the exciter is fixedly arranged on the specimen support frame.

[0012] Preferably, it further comprises a spray test assembly, wherein the spray test assembly is used to perform a spray test on the test piece; The spray test assembly comprises a waterproof cover fixedly arranged on a specimen support frame, a plurality of spray heads are fixedly arranged on the waterproof cover, and a drainage pipe is fixedly connected to the bottom of the waterproof cover.

[0013] Preferably, the first pad, the second pad and the third pad are all fixedly provided with a locking assembly; Protective covers are fixedly provided on the outer sides of the power output assembly, radial loading assembly, specimen support assembly, axial loading assembly and bending moment loading assembly.

[0014] Preferably, the locking assembly is a pneumatic lock.

[0015] Compared with the prior art, the present invention has the following beneficial effects: 1. Significantly improves the authenticity of operating condition input, maximizing its approximation to the actual operating conditions of fan bracket bearings: The device's vibration exciter is capable of generating vibrations of specific frequencies and amplitudes, accurately simulating the vibration conditions experienced by the test specimen during actual engine operation. This ensures that the mechanical environment faced by the fan bracket bearing during testing is more closely aligned with actual operating conditions. Furthermore, the exciter's placement is flexible, significantly reducing costs compared to traditional vibration test benches. Furthermore, it works in conjunction with the specimen support assembly to accommodate a wider range of engine fan and bracket types, effectively enhancing the test device's versatility. The radial loading component relies on the radial loading electric cylinder to apply radial force to the test piece, and uses the radial force sensor to monitor the force in real time, thereby simulating the situation where the test piece is subjected to radial force during actual operation; The moment loading component can perform moment load tests on the test piece. It relies on the moment loading electric cylinder, moment shaft, and moment pulley to apply moment force to the rotating test piece. Combined with the monitoring function of the moment sensor, it can restore complex stress conditions and provide more comprehensive and accurate data support for the test. The axial loading component can apply axial force to the test piece and monitor it with the help of an axial force sensor to explore the performance of the test piece under axial force, further expanding the richness of test conditions. The sprinkler head in the spray test assembly sprays the test piece in all directions at a specific pressure and spray angle, simulating both liquid and slurry, thereby simulating various working conditions that the test piece may encounter in the real environment, such as water ingress, moisture, and even mud and sand. During this process, the waterproof cover and protective cover work together to ensure that the test process is not interfered with by external factors, effectively ensuring the authenticity and reliability of the working condition simulation; The above components can operate independently or work together. By simulating the stress conditions of the engine fan bracket bearing under different working conditions and environments, the entire test is made as close to the actual working conditions as possible, greatly improving the comprehensiveness of the test and providing more accurate and comprehensive data basis for the performance evaluation of the engine fan bracket bearing. 2. Enhanced test data integrity, capable of simulating operating inputs of different engine models. This system can simulate various operating conditions, including vibration, radial force, bending moment, axial force, and spray, and employs corresponding sensors for real-time monitoring and data collection of key parameters under each operating condition. For example, torque sensors monitor power transmission torque, radial force sensors monitor radial force, bending moment sensors monitor bending moment, and axial force sensors monitor axial force. This allows comprehensive acquisition of fan bracket bearing performance data under different operating conditions, enhancing test data integrity. 3. The test piece is heated by the heating rod, which significantly reduces the heat loss caused by air heat transfer and effectively improves the heating efficiency. The heating rod adopts induction heating method, which has the characteristics of rapid temperature rise and the heating time can be precisely controlled. The test piece can reach the set temperature in a short time, and the heating time can be accurately set according to specific test requirements. In the design of the heating component, the heating rod is directly fixed on the heat conduction plate, which effectively solves the problem of limited space in the traditional temperature control box and reduces the cost of the temperature control module; an insulation pad is set between the heat conduction plate and the specimen support frame, so that the heat can be concentrated in the heating plate area, reducing the loss caused by heat transfer through the air, so that the heat can be efficiently transferred to the test piece, thereby improving the heating efficiency; this helps to more accurately simulate the heating conditions of the test piece during actual operation, and provides more reliable and accurate test conditions for studying the performance of fan bracket bearings in thermal environments. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the three-dimensional structure of the overall device of the present invention; Figure 2 This is a schematic diagram of the three-dimensional structure of the overall device of the present invention (protective cover is hidden); Figure 3 A top view of the present invention; Figure 4 This is a schematic diagram of power transmission of the present invention; Figure 5 This is a schematic diagram of the three-dimensional structure of the overall device of the present invention from another perspective; Figure 6 This is a schematic diagram of the three-dimensional structure of the power output assembly of the present invention; Figure 7 This is a schematic diagram of the three-dimensional structure of the radial loading assembly of the present invention; Figure 8 This is a schematic diagram of the three-dimensional structure of the moment loading assembly of the present invention; Figure 9 This is a schematic diagram of the three-dimensional structure of the axial loading assembly of the present invention; Figure 10 This is a schematic diagram of the three-dimensional structure of the specimen support assembly of the present invention; Figure 11 It is a schematic diagram of the three-dimensional structure of the spray test assembly of the present invention.

[0017] In the figure: 1, base; 2, support platform; 201, buffer pad; 3, power output assembly; 301, drive motor; 302, bearing seat; 303, output shaft; 304, driving pulley; 305, torque sensor; 4, radial loading assembly; 401, first linear module; 402, first pad; 403, radial shaft; 404, radial pulley; 405, driven pulley; 406, radial loading electric cylinder; 407, radial force sensor; 5, bending moment loading assembly; 501, second linear module; 502, second pad; 503, bending moment shaft; 504, bending moment pulley; 5 05. Bending moment loading electric cylinder; 506. Bending moment sensor; 6. Axial loading assembly; 601. Axial bracket; 602. Third linear module; 603. Third pad; 604. Axial shaft; 605. Axial force sensor; 606. Axial loading electric cylinder; 7. Specimen support assembly; 701. Specimen support frame; 702. Heat conduction plate; 703. Insulation pad; 704. Vibrator; 705. Heating rod; 8. Spray test assembly; 801. Waterproof cover; 802. Sprinkler head; 803. Drain pipe; 9. Pneumatic lock; 10. Protective cover; 11. Belt; 12. Radial bending platform. DETAILED DESCRIPTION

[0018] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0019] See also Figure 1-11The present invention provides a technical solution: the engine test piece includes a fan bracket (hereinafter referred to as the fixed test piece) and a fan body (hereinafter referred to as the rotating test piece), and the fixed test piece and the rotating test piece are rotatably connected through mechanical components such as bearings.

[0020] Example 1: An engine fan bracket bearing performance test device, the base 1 of the device is the foundation of the entire structure, such as Figure 2 As shown, it is provided with several T-slots, which provide convenient conditions for the flexible layout of subsequent components; Support platform 2 is connected to the T-slot of base 1 via bolts and nuts. The position of support platform 2 on base 1 is selected based on the actual test parameters to accommodate the testing requirements of test pieces of varying specifications. Several cushioning pads 201 are installed at the connection between support platform 2 and base 1. These cushioning pads 201 fit over the outer edges of the connecting bolts. On the support platform 2, a number of test components that work together are fixedly installed, including: Specimen support assembly 7: like Figure 10 As shown, the specimen support assembly 7 is mainly composed of a specimen support frame 701 fixedly mounted on the support platform 2, and the heating assembly is fixed to the specimen support frame 701. The heating assembly includes a heat conducting plate 702 fixedly mounted on the specimen support frame 701. To prevent heat loss, a heat insulating pad 703 is provided between the contact surface of the specimen support frame 701 and the heat conducting plate 702. A plurality of heating rods 705 are fixedly mounted on the heat conducting plate 702. In this embodiment, the heating rods 705 are arranged in two groups and are horizontally mounted on both sides of the axial shaft 604. Mounting holes can be provided on the heat conducting plate 702 according to actual needs, making it easy to install fixed test pieces (such as fan brackets and bearings) on the heat conducting plate 702. When installing fixed test pieces, operators have a variety of reliable connection methods to choose from. In addition to the more common bolt connection method, welding or gluing can also be used according to actual conditions to ensure that the fixed test pieces are firmly installed on the heat conducting plate 702. At the same time, a through hole is specially provided on the heat conducting plate 702 for the axial shaft 604 to move. This design ensures that during the test process, the axial shaft 604 can move freely and unhindered, thereby ensuring the smooth operation of the entire test device. At the bottom of the specimen support frame 701, a vibration exciter 704 is fixedly installed; the vibration exciter 704 is a common device type well known to technicians in this technical field. The specific model and specifications of the vibration exciter 704 can be reasonably selected by the test personnel according to the actual test needs and scenarios; when the vibration exciter 704 starts to run, it can generate vibrations of a specific frequency and amplitude, thereby driving the entire specimen support assembly 7 and the support platform 2 to produce corresponding vibration effects, thereby accurately simulating the vibration conditions faced by the test piece (such as the fan bracket and bearing) during actual engine operation; at the same time, the rubber buffer pad 201 can also absorb part of the vibration to prevent the drive motor 301 and other components from loosening due to vibration. Through this simulation, the performance of the fan bracket bearing in a vibration environment can be comprehensively and in-depth tested, such as its structural stability, fatigue resistance, and the impact on the operation of the fan body and other performance indicators, providing extremely critical data support and performance reference basis for the optimization design and quality improvement of the engine fan bracket bearing; Power take-off assembly 3: like Figure 5 and Figure 6 As shown, the power output assembly 3 is responsible for power transmission in the entire engine fan bracket bearing performance test device; The power output assembly 3 primarily comprises a drive motor 301 fixed to the base 1, a torque sensor, and several bearing blocks 302. These bearing blocks 302 provide a stable support structure for the rotation of subsequent components. Output shafts 303 are rotatably mounted within these bearing blocks 302. The drive motor 301 serves as the power source. In this embodiment, a 90W motor is selected. The specific model can be flexibly determined based on actual testing requirements. Operators can select an appropriate motor model based on the testing requirements of different test pieces.

[0021] In terms of connection, the shaft of the drive motor 301 and the torque sensor shaft are fixedly connected via a coupling. This coupling connection method has high reliability and stability, and can effectively transmit the power generated by the drive motor 301 to the torque sensor. The other end of the torque sensor shaft is also fixedly connected to the output shaft 303 with the help of a coupling. In this way, a complete and orderly power transmission chain is formed, that is, power is transmitted in sequence through the drive motor 301, coupling, torque sensor, coupling, and output shaft 303, and finally the power is transmitted to the active pulley 304 fixed at the other end of the output shaft 303; When the drive motor 301 is started, its internal motor shaft begins to rotate. Because it is tightly connected to the torque sensor's shaft via a coupling, the motor shaft's rotational torque is smoothly transmitted to the torque sensor. The torque sensor plays a crucial monitoring role in this process, accurately measuring the torque generated during power transmission in real time and transmitting this data to a relevant monitoring system or data acquisition device for subsequent analysis and evaluation of the stability and accuracy of power transmission. After being monitored by the torque sensor, the power is transmitted through the coupling to the output shaft 303. Supported by the bearing seat 302, the output shaft 303 rotates steadily, driving the driving pulley 304 at its other end to rotate along with it. The rotation of the driving pulley 304 provides the power foundation for subsequent coordinated operation with other components, thereby further transmitting power to the rotating test piece, driving it to perform the corresponding operation test. This comprehensively examines the performance of the engine fan bracket bearing under different power loading conditions, including its power load capacity, transmission efficiency, and stability during power transmission, among other key performance indicators. The drive motor 301, coupling, and torque sensor in this embodiment are all commonly used devices in the technical field and are well known to those skilled in the art. Operators can select and install them according to actual conditions, and will not be described in detail here. The support platform 2 is fixedly provided with a radial bending platform 12, which plays a key role in the radial loading test; Radial loading component 4: like Figure 7 As shown, the radial loading assembly 4 functions to precisely apply radial force to the test piece and monitor the applied radial force in real time via a radial force sensor 407 incorporated therein. Two first linear modules 401 are mounted on the radial bending platform 12, providing guidance and support for the linear motion of subsequent components. A first pad 402 is fixedly mounted on the slider of the first linear module 401. The first pad 402 is securely connected to the slider via a reliable connection (e.g., bolts) to ensure that it does not loosen or deviate during motion. An axle seat is installed on the first pad 402, and the radial shaft 403 is rotatably set in the axle seat. A radial pulley 404 is fixedly provided at one end of the radial shaft 403, and a driven pulley 405 is fixedly provided at the other end. A belt 11 is provided between the driven pulley 405 and the driving pulley 304. As a component in the power output assembly 3, the driving pulley 304 rotates at high speed under the drive of the drive motor 301, and transmits power to the driven pulley 405 through the belt 11, thereby driving the radial shaft 403 and the radial pulley 404 to rotate together. At the same time, a detachable belt 11 is also provided between the radial pulley 404 and the rotating test piece. This design facilitates the installation and disassembly of the rotating test piece, so that it can be quickly replaced and adjusted when testing different rotating test pieces. Since the radial bending platform 12 is arranged on the support platform 2, when the vibrator 704 on the specimen support frame 701 vibrates, other components on the support platform 2 will also vibrate. The belt 11 between the driven pulley 405 and the driving pulley 304 can absorb some of the vibration, so that the power of the drive motor 301 is better transmitted to the radial shaft 403 and then to the rotating specimen, making the rotation of the rotating specimen more stable. A radial loading electric cylinder 406 is also fixedly mounted on the radial bending platform 12, and its travel direction is parallel to the direction of the first linear module 401. When the radial loading electric cylinder 406 is extended or retracted, it can drive the first pad 402 to slide linearly on the first linear module 401, thereby applying radial force to the test piece. When the piston rod of the radial loading electric cylinder 406 extends or retracts, it applies a thrust or pull along the linear module direction to the first pad 402. Due to the connection between the first pad 402 and the radial shaft 403, radial pulley 404, and other components, this force ultimately acts on the rotating test piece, simulating the radial force it experiences during actual operation. A radial force sensor 407, located between the first pad 402 and the active end of the radial loading electric cylinder 406, accurately monitors the magnitude of the radial force acting on the test piece in real time and transmits this data to the test apparatus's control system or data acquisition equipment, enabling detailed recording and analysis of the radial force parameters during testing. In order to obtain more accurate constant data during the test process, a locking assembly is further provided on the first pad 402. The locking assembly in this embodiment adopts a pneumatic lock 9. The pneumatic lock 9 is a device commonly used in the art and well known to technicians. Its working principle is to use the pressure of compressed air to control the opening and closing of the lock cylinder. When it is necessary to lock the first pad 402 on the track of the first linear module 401, the operator can control the air intake and exhaust of the pneumatic lock 9 to extend the lock cylinder and lock it into a specific position on the track, thereby achieving stable locking of the first pad 402. When unlocking is required, the air path state of the pneumatic lock 9 is simply changed to retract the lock core, and the first pad 402 can then slide freely under the drive of the radial load electric cylinder 406. Testers can choose the appropriate pneumatic lock 9 from a variety of models and specifications to lock the linear module according to actual test conditions to meet different test accuracy and requirements. When conducting the test, the operator first needs to firmly fix the test piece on the test piece support assembly 7 through a reliable connection method (generally bolt connection), ensuring that the test piece will not be displaced or loosened during the entire test process; Then, if Figure 7 As shown, the belt 11 is accurately placed between the rotating test piece and the radial pulley 404. After completing this series of preparatory steps, the drive motor 301 is started. After the drive motor 301 begins to operate, the power it generates is monitored and data collected in real time by the torque sensor. The power is then transmitted to the rotating test piece through the output shaft 303, the driving pulley, the driven pulley 405, the radial shaft 403, the radial pulley 404, and the belt 11, causing the rotating test piece to rotate according to the predetermined requirements. At the same time, according to the test plan and requirements, the experimenter can control the extension and retraction of the radial loading electric cylinder 406 to accurately simulate the various states of the test piece when subjected to radial force. The radial force sensor 407 monitors the changes in the magnitude of the radial force in real time. Combined with the locking operation of the locking assembly on the first pad 402, this allows for a comprehensive and in-depth test and evaluation of the test piece's performance under radial force loading conditions, providing important test data and technical basis for the design optimization and quality improvement of the test piece.

[0022] Example 2: On the basis of the previous embodiment, in order to be able to carry out a bending moment load test on a test piece with a long axial length, thereby comprehensively evaluating the performance of the test piece under complex stress conditions, this embodiment provides a bending moment loading component 5; The main function of the bending moment loading assembly 5 is to accurately apply bending moment to the test piece and to monitor and collect data of the applied bending moment in real time and accurately with the help of the built-in bending moment sensor 506; like Figure 8As shown, two groups of second linear modules 501 are firmly fixed on the radial bending platform 12. On the slider of the second linear module 501, a second pad 502 is fixedly connected, and on the second pad 502, an axle seat is set, and the bending moment shaft 503 is rotatably set in the axle seat. This rotation setting method enables the bending moment shaft 503 to flexibly rotate around its own axis in the axle seat to meet the rotation requirements of the test piece when it is subjected to bending moment. A bending moment pulley 504 is fixedly sleeved on the bending moment shaft 503, and a detachable belt 11 is sleeved between the bending moment pulley 504 and the rotating test piece. This detachable connection method greatly facilitates the replacement and adjustment operations of different rotating test pieces during the test process, thereby improving the versatility and flexibility of the test device. A moment-loading electric cylinder 505 is fixedly mounted on the radial bending platform 12, its movable end fixedly connected to the second pad 502. Upon receiving a start command, the moment-loading electric cylinder 505 drives the piston rod to extend and retract. Due to the fixed connection between the piston rod and the second pad 502, the piston rod's retractable motion is converted into linear motion of the second pad 502 along the second linear module 501, thereby applying a bending moment force to the rotating test piece via the moment shaft 503 and moment pulley 504. During this process, the bending moment sensor 506 plays a monitoring role. It is fixedly installed between the second pad 502 and the active end of the bending moment loading electric cylinder 505. The bending moment sensor 506 can sense and measure the bending moment generated during the bending moment loading process in real time, and quickly transmit this data in the form of electrical signals to the control system or data acquisition equipment of the test device for in-depth analysis and processing of the bending moment data, providing accurate data basis for evaluating the performance of the test piece under bending moment loading conditions. In the specific test operation process, the operator first needs to put the belt 11 between the bending moment pulley 504 and the rotating test piece to ensure that the connection path between power transmission and bending moment loading is smooth. Figure 4 As shown, the dotted line in the figure represents the transmission route. When the driving motor 301 drives the rotating test piece stably according to the predetermined power transmission path (as described in the previous embodiment, the rotating test piece is driven to rotate through a series of components such as the radial pulley 404), the experimenter can start the bending moment loading electric cylinder 505 in a timely manner according to the test plan and requirements; After the moment loading electric cylinder 505 is started, it drives the second pad 502 and the moment shaft 503 thereon to move in the corresponding direction. The moment pulley 504 and the belt 11 apply a moment force to the rotating test piece, and the moment sensor 506 monitors the change in the magnitude of the moment in real time. In order to obtain more accurate and constant moment data, a locking assembly is also provided on the second pad 502. This locking assembly is similar to the common devices such as the pneumatic lock 9 in the previous embodiment. When it is necessary to lock the second pad 502 on the track of the second linear module 501, the air circuit system of the pneumatic lock 9 is controlled so that the lock core is extended and tightly engaged with the specific structure on the track, thereby firmly locking the second pad 502 in the current position, ensuring that the moment force acts stably on the test piece; When it is necessary to adjust the bending moment or change the test state, it is only necessary to reverse the operation of the pneumatic lock 9 air circuit to retract the lock core, and the second pad 502 can move freely under the drive of the bending moment loading electric cylinder 505. In this way, the performance of the test piece under the bending moment loading condition can be comprehensively and carefully tested and evaluated, providing key test data and technical support for the optimized design and performance improvement of the test piece.

[0023] Example 3: Based on the test device in the above embodiment, in order to explore the performance of the test piece under axial force, an axial loading component 6 is added in this embodiment; The function of the axial loading assembly 6 is to apply an axial force to the test piece, and to monitor and collect data of the applied axial force in real time and accurately with the help of the axial force sensor 605 provided therein; like Figure 9 As shown, the axial bracket 601 serves as the basic supporting structure of the entire axial loading assembly 6 and is fixedly arranged on the support platform 2. Two sets of third linear modules 602 are fixedly arranged on the axial bracket 601. The slider of the third linear module 602 is fixedly connected to the third pad 603. On the third pad 603, an axle seat is fixedly arranged. The axle seat can allow the axial shaft 604 to rotate freely therein, and can also ensure that the axial shaft 604 moves linearly along the axial direction, thereby meeting the requirements of applying axial force to the test piece and adapting to the complex working conditions of the test piece during rotation. The axial shaft 604 passes through the heat conducting plate 702, and one end thereof can directly contact the test piece when the device is working normally, so as to effectively transmit the axial force to the test piece; At the same time, an axial loading electric cylinder 606 is also fixedly installed on the axial bracket 601. The movable end of the electric cylinder is fixedly connected to the third pad 603 through a secure connection. When the axial loading electric cylinder 606 receives the start command, it drives the piston rod to perform telescopic movement. Due to the fixed connection between the piston rod and the third pad 603, the telescopic movement of the piston rod will be converted into the linear movement of the third pad 603 along the third linear module 602, which in turn pushes the axial shaft 604 toward the direction of the test piece, thereby applying axial force to key components such as the bearings between the fixed test piece and the rotating test piece. The axial force sensor 605 is fixedly mounted between the third pad 603 and the active end of the axial loading electric cylinder 606. Using its highly sensitive strain gauges and other sensing elements, the axial force sensor 605 can sense and measure the axial force generated during the axial loading process in real time. This data is then rapidly transmitted in the form of electrical signals to the control system or data acquisition equipment of the test device for in-depth analysis and processing of the axial force data, providing accurate data for evaluating the performance of the test piece under axial load conditions. In the actual operation process of this embodiment, when the drive motor 301 drives the test piece to rotate according to the established power transmission route (as described in detail in the first embodiment, that is, the drive motor 301 rotates to generate power, which is monitored by the torque sensor and then transmitted to the test piece through a series of components such as the output shaft 303, the driving pulley 304, the driven pulley 405, the radial shaft 403, and the belt 11, causing the test piece to start rotating), the experimenter can start the axial loading electric cylinder 606 according to the test plan; After the axial loading electric cylinder 606 is activated, it pushes the third pad 603 and the axial shaft 604 thereon toward the test piece, applying an axial force to the bearings and other components. The axial force sensor 605 monitors the changes in the axial force in real time. Furthermore, to obtain more accurate and constant axial force data, a locking assembly is also provided on the third pad 603. This locking assembly, similar to that in the previous embodiment, utilizes a pneumatic lock 9, a commonly used device in the art. When it is necessary to lock the third pad 603 on the track of the third linear module 602, the air circuit system of the pneumatic lock 9 is controlled to make the lock core extend and tightly engage with the specific structure on the track, thereby firmly locking the third pad 603 in the current position, ensuring that the axial force acts stably on the test piece; when it is necessary to adjust the axial force or change the test state, it is only necessary to reverse the air circuit of the pneumatic lock 9 to retract the lock core, and the third pad 603 can move freely again under the drive of the axial loading electric cylinder 606, so that the performance of the engine fan bracket bearing under axial force loading conditions can be comprehensively and meticulously tested and evaluated, providing key test data and technical support for the optimized design and performance improvement of the engine fan bracket and bearings.

[0024] Example 4: In order to fully and realistically simulate the spray environment that the test piece may encounter during actual operation, a spray test assembly 8 is added in this embodiment. The function of the spray test assembly 8 is to conduct a spray test on the test piece, so as to further explore the performance of the test piece in a humid or muddy environment; like Figure 11 As shown, the spray test assembly 8 includes a waterproof cover 801 and a spray head 802. The waterproof cover 801 is fixedly mounted on the specimen support frame 701. A plurality of spray heads 802 are fixedly mounted on the waterproof cover 801. These spray heads 802 are evenly distributed at specific positions of the waterproof cover 801 to achieve all-round spray coverage of the specimen. The sprinkler head 802 is connected to an external water pipe or water pump to achieve the spraying function (the water pipe is not shown in the figure). The sprinkler head 802 can be connected to not only liquid but also mud to simulate the state of a vehicle driving on a mudflat. In order to promptly remove the accumulated liquid in the waterproof cover 801 during the spraying process, a drain pipe 803 is fixedly connected to the bottom of the waterproof cover 801. The other end of the drain pipe 803 can be connected to the drainage system to smoothly drain the accumulated liquid, maintain the water level balance in the waterproof cover 801, and ensure the continuous and stable progress of the spray test; In order to protect the power output assembly 3, radial loading assembly 4, specimen support assembly 7, axial loading assembly 6 and bending moment loading assembly 5 from interference and damage by external factors (such as spray water splashing, dust pollution, etc.), protective covers 10 are fixedly installed on the outside of these components; When conducting a spray test, first ensure that the external water pipe is well connected to the sprinkler head 802 and that the water supply is normal. When the sprinkler system is turned on, water flows into the sprinkler head 802 through the water pipe. The sprinkler head 802 sprays water evenly on the test piece at a specific pressure and spray angle, simulating the rain or humid working conditions of the test piece in the actual environment. During the spraying process, the waterproof cover 801 can effectively collect the spray water and discharge it in time through the drain pipe 803 to prevent the accumulation of water from causing adverse effects on the test device. The protective cover 10 on the outside of each component always plays a protective role, ensuring the normal operation and stable performance of the internal components during the spray test, so that the entire test device can comprehensively and accurately test and evaluate the performance of the engine fan bracket bearing in the spray environment, providing important test data and technical support for the design optimization and quality improvement of the engine fan bracket and bearing.

[0025] Working principle: First, according to the specifications of the test piece and the test requirements, the experimenter adjusts the position of the support platform 2 in the T-slot of the base 1 and fixes it with bolts and nuts; In terms of the specimen support assembly 7: The fixed test piece is fixed on the heat conducting plate 702 of the test piece support frame 701 by welding, bolting or gluing. The heating rod 705 on the heat conducting plate 702 can be started according to the test requirements to heat the fixed test piece to simulate its heating condition; The exciter 704 can be activated to generate vibrations of a specific frequency and amplitude, driving the specimen support assembly 7 and the support platform 2 to vibrate, simulating the vibration environment of the specimen when the engine is running. The rubber buffer pad 201 absorbs part of the vibration to prevent the components from loosening. For power take-off assembly 3: The drive motor 301 shaft is connected to the torque sensor shaft through a coupling, and the other end of the torque sensor shaft is connected to the output shaft 303 through a coupling. The driving pulley 304 on the output shaft 303 rotates after the motor is started; When testing radially loaded component 4: First, put the belt 11 between the rotating test piece and the radial pulley 404, and install the fixed test piece; The driving motor 301 is started, and the power is transmitted through the torque sensor, the output shaft 303, the driving pulley 304, the driven pulley 405, and the radial shaft 403 to the radial pulley 404 and the rotating test piece to make it rotate; According to the test plan, the experimenter controls the radial loading electric cylinder 406 to extend and retract, driving the first pad 402 to slide on the first linear module 401. The radial shaft 403 and radial pulley 404 apply radial force to the rotating test piece. The radial force sensor 407 monitors the radial force in real time, and the locking assembly locks the first pad 402 to obtain accurate and constant data. When testing the moment loading component 5 (for axially longer specimens): Put the belt 11 between the bending moment pulley 504 and the rotating test piece; After the driving motor 301 drives the rotating test piece to rotate according to the conventional power transmission path, the bending moment loading electric cylinder 505 is activated. The piston rod thereof is extended and retracted, causing the second pad 502 to move on the second linear module 501. A bending moment force is applied to the rotating test piece via the bending moment shaft 503 and the bending moment pulley 504. The bending moment sensor 506 monitors the magnitude of the bending moment. Similarly, the locking assembly can be used to lock the second pad 502 to obtain accurate data. For axially loaded component 6 tests: After the drive motor 301 drives the test piece to rotate, it activates the axial loading electric cylinder 606. The piston rod retracts and pushes the third pad 603 on the third linear module 602, driving the axial shaft 604 to apply axial force to the bearings and other components between the fixed test piece and the rotating test piece. The axial force sensor 605 monitors the changes in the axial force, and the locking assembly locks the third pad 603 to stabilize the axial force. When testing the spray test assembly 8: After ensuring that the external water pipe is properly connected to the sprinkler head 802 and the water supply is stable, turn on the sprinkler system. Muddy water flows into the sprinkler head 802 through the water pipe and is sprayed on the test piece at a specific pressure and angle to simulate a muddy or humid environment. The waterproof cover 801 collects the accumulated water and discharges it through the drain pipe 803.

Claims

1. An engine fan bracket bearing performance testing device, comprising a base (1), characterized in that: The base (1) is fixedly provided with: A power output assembly (3) for outputting power to a test piece, wherein a torque sensor (305) is provided in the power output assembly (3); A radial loading assembly (4) for applying radial force to a test piece, wherein a radial force sensor (407) is provided in the radial loading assembly (4); A specimen support assembly (7) is used to support the specimen, and a heating assembly is provided in the specimen support assembly (7); An axial loading assembly (6) for applying an axial force to the test piece, wherein an axial force sensor (605) is provided in the axial loading assembly (6); A support platform (2) is fixedly provided on the base (1), and the support platform (2) and the base (1) are fixedly connected via a plurality of buffer pads (201). The specimen support assembly (7), the bending moment loading assembly (5), the radial loading assembly (4) and the axial loading assembly (6) are all fixedly provided on the support platform (2), and an exciter (704) is also provided in the specimen support assembly (7).

2. The engine fan bracket bearing performance testing device according to claim 1, characterized in that: The power output assembly (3) comprises a drive motor (301) fixedly arranged on the base (1), a torque sensor (305) and a plurality of bearing seats (302), wherein output shafts (303) are rotatably arranged in the plurality of bearing seats (302); The shaft of the drive motor (301) is fixedly connected to the rotating shaft of the torque sensor (305), the other end of the rotating shaft of the torque sensor (305) is fixedly connected to the output shaft (303), and the other end of the output shaft (303) is fixedly provided with a driving pulley (304).

3. The engine fan bracket bearing performance testing device according to claim 2, characterized in that: A radial bending platform (12) is fixedly provided on the support platform (2), and the radial loading assembly (4) includes a plurality of first linear modules (401) fixedly provided on the radial bending platform (12), a first pad (402) is fixedly provided on the slider of the first linear module (401), a radial shaft (403) is rotatably provided on the first pad (402), one end of the radial shaft (403) is fixedly provided with a radial pulley (404), and the other end of the radial shaft (403) is fixedly provided with a driven pulley (405), and a belt (11) is provided between the driven pulley (405) and the driving pulley (304); A detachable belt (11) is also provided between the radial pulley (404) and the rotating test piece; A radial loading electric cylinder (406) is also fixedly provided on the radial bending platform (12), and a movable end of the radial loading electric cylinder (406) is fixedly connected to the first pad (402); The radial force sensor (407) is fixedly arranged between the first pad (402) and the movable end of the radial loading electric cylinder (406).

4. The engine fan bracket bearing performance testing device according to claim 3, characterized in that: It also includes a bending moment loading component (5) for performing bending moment loading on the test piece; The bending moment loading assembly (5) comprises a plurality of second linear modules (501) fixedly arranged on the radial bending platform (12), a second pad (502) fixedly arranged on the sliders of the plurality of second linear modules (501), a bending moment shaft (503) rotatably arranged on the second pad (502), a bending moment pulley (504) fixedly sleeved on the bending moment shaft (503), and a detachable belt (11) sleeved between the bending moment pulley (504) and the rotating test piece; A bending moment loading electric cylinder (505) is fixedly provided on the radial bending platform (12), and a movable end of the bending moment loading electric cylinder (505) is fixedly connected to the second pad (502); A bending moment sensor (506) is provided in the bending moment loading assembly (5), and the bending moment sensor (506) is fixedly arranged between the second pad (502) and the movable end of the bending moment loading electric cylinder (505).

5. The engine fan bracket bearing performance testing device according to claim 4, characterized in that: The axial loading assembly (6) comprises an axial bracket (601) fixedly arranged on the support platform (2), a plurality of third linear modules (602) fixedly arranged on the axial bracket (601), a third pad (603) fixedly arranged on the sliders of the plurality of third linear modules (602), an axial shaft (604) movably arranged on the third pad (603), the axial shaft (604) passing through the heat conducting plate (702), and one end of the axial shaft (604) in contact with the test piece during operation; An axial loading electric cylinder (606) is fixedly provided on the axial support (601), and a movable end of the axial loading electric cylinder (606) is fixedly connected to the third pad (603); The axial force sensor (605) is fixedly arranged between the third pad (603) and the movable end of the axial loading electric cylinder (606).

6. The engine fan bracket bearing performance testing device according to claim 4, characterized in that: The specimen support assembly (7) comprises a specimen support frame (701) fixedly arranged on the support platform (2), and the heating assembly is fixedly arranged on the specimen support frame (701); The heating assembly comprises a heat conducting plate (702) fixedly arranged on a specimen support frame (701), a heat insulating pad (703) is arranged between the contact surface of the specimen support frame (701) and the heat conducting plate (702), a plurality of heating rods (705) are fixedly arranged on the heat conducting plate (702), and the exciter (704) is fixedly arranged on the specimen support frame (701).

7. The engine fan bracket bearing performance testing device according to claim 1, characterized in that: Also included is a spray test assembly (8), wherein the spray test assembly (8) is used to perform a spray test on the test piece; The spray test assembly (8) comprises a waterproof cover (801) fixedly arranged on a specimen support frame (701), a plurality of spray heads (802) fixedly arranged on the waterproof cover (801), and a drainage pipe (803) fixedly connected to the bottom of the waterproof cover (801).

8. An engine fan bracket bearing performance testing device according to any one of claims 3 to 5, characterized in that: The first pad (402), the second pad (502) and the third pad (603) are all fixedly provided with locking components; Protective covers (10) are fixedly provided on the outsides of the power output assembly (3), radial loading assembly (4), specimen support assembly (7), axial loading assembly (6) and bending moment loading assembly (5).

9. The engine fan bracket bearing performance testing device according to claim 8, characterized in that: The locking assembly is a pneumatic lock (9).

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