Modularized controllable swing device for testing heat transfer performance of loop heat pipe

Abstract

The invention discloses a modularized controllable swing device for testing the heat transfer performance of a modularized loop heat pipe. The modularized controllable swing device comprises a base, a mounting platform, a driving mechanism and a controller. Wherein the base comprises a base plate and two brackets which are oppositely arranged on the base plate; the mounting platform is rotatably arranged between the two brackets, one end of the mounting platform is rotatably arranged on the corresponding bracket through a rotating shaft, and an adjustable clamp is mounted on the mounting platform; the driving mechanism is arranged on one side of the base, is in transmission connection with the rotating shaft and is used for driving the mounting platform to periodically swing back and forth around the central axis of the rotating shaft through the rotating shaft; the controller is electrically connected with the driving mechanism and used for driving the driving mechanism in an open-loop programmable control mode to enable the mounting platform to swing within a preset angular velocity range. According to the multi-degree-of-freedom platform, only reciprocating swing of a single horizontal shaft is achieved, complex mechanisms and redundant control degrees of freedom in the multi-degree-of-freedom platform are avoided, and system complexity and manufacturing and maintenance cost are reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of loop heat pipe heat transfer performance testing, and particularly relates to a modular controllable oscillation device for loop heat pipe heat transfer performance testing. BACKGROUND

[0002] Loop heat pipe (LHP) is a kind of high-efficiency heat transfer element, which is often used in the fields of spacecraft thermal control and electronic equipment heat dissipation. In the prior art, in order to evaluate the heat transfer performance of the loop heat pipe under dynamic environment, the thermodynamic behavior of the loop heat pipe under the working condition of oscillation or vibration needs to be simulated.

[0003] A large-angle experimental swing table is mentioned in Chinese patent No. CN104596565A, which can swing the test piece in multiple directions at a large angle. However, the swing table has the problems of complex and unstable structure and difficulty in accurately moving according to the required amplitude in the swing test.

[0004] Therefore, a new technical scheme is needed. SUMMARY

[0005] Therefore, the present application provides a modular controllable oscillation device for loop heat pipe heat transfer performance testing to at least solve the problems of complex and unstable structure and difficulty in accurately moving according to the required amplitude of the existing swing table.

[0006] The present application provides the following technical scheme:

[0007] The present application provides a modular controllable oscillation device for loop heat pipe heat transfer performance testing, comprising:

[0008] A base, the base comprising a base plate and two supports oppositely arranged on the base plate;

[0009] A mounting platform, the mounting platform being rotatably arranged between the two supports, one end of the mounting platform being rotatably arranged on the corresponding support through a rotating shaft, and a clamp being arranged on the mounting platform;

[0010] A driving mechanism, the driving mechanism being arranged on one side of the base and being in transmission connection with the rotating shaft, for driving the mounting platform to periodically and reciprocally oscillate around the central axis of the rotating shaft through the rotating shaft;

[0011] A controller, the controller being in electrical connection with the driving mechanism, for driving the driving mechanism in an open-loop programmable control mode to make the mounting platform oscillate within a preset angular velocity range.

[0012] Further, the modular controllable oscillation device for loop heat pipe heat transfer performance testing further comprises:

[0013] The platform stabilizing structure comprises two counterweight parts, which are oppositely arranged at the bottom end of the mounting platform and symmetrically arranged relative to the mounting platform.

[0014] Further, the modular controllable swing device for heat transfer performance test of the loop heat pipe further comprises:

[0015] The damping pad is arranged at the bottom end of the base and is used for isolating and absorbing the vibration transmitted to the ground by the base.

[0016] Further, a plurality of general interface holes are arranged on the mounting platform in an array, the clamp is connected with the general interface hole, so that the clamp can clamp test pieces of different sizes and can cope with different types of clamps.

[0017] Further, the rotating shaft is rotatably arranged on one of the supports through a bearing.

[0018] Further, the driving mechanism comprises:

[0019] The motor is in transmission connection with the rotating shaft.

[0020] Further, the motor is in transmission connection with the rotating shaft through a speed reduction gear set.

[0021] Further, the speed reduction gear set comprises a pinion and a gear; the pinion is coaxially connected to the output shaft of the motor; the gear is coaxially connected to the rotating shaft and is in meshing connection with the pinion.

[0022] Further, the controller is an embedded programmable logic controller, and the controller is configured to generate a target motion curve according to the swing input parameters after obtaining the swing input parameters, and send a control signal to the driving mechanism according to the target motion curve, wherein the swing input parameters include one or more of a swing angle amplitude, an angular velocity, a swing period and a swing duration.

[0023] Further, a human-computer interface and a safety protection unit are further included; the human-computer interface is electrically connected with the controller; the safety protection unit comprises an emergency stop button and a limit switch; the emergency stop button is connected with the driving circuit of the driving mechanism and is used for controlling the start or stop of the driving mechanism; the limit switch is connected with the driving power supply of the driving mechanism.

[0024] Compared with the prior art, the above-mentioned at least one technical scheme adopted by the embodiment of the present application can achieve the beneficial effects at least including:

[0025] The modular controllable swing device for heat transfer performance test of the loop heat pipe has simple structure, avoids complex mechanism and redundant control freedom in a multi-freedom platform by only realizing reciprocating swing of a single horizontal shaft, and reduces use of sensors and high-performance controllers by replacing a closed-loop servo system with an open-loop programmable control, thereby reducing system complexity and manufacturing and maintenance costs, and especially compared with a large swing platform in the prior art which adopts multiple hydraulic cylinders or a complex parallel mechanism, the device has compact structure, low failure rate and convenient maintenance.

[0026] The open-loop pre-programmed control mode is adopted in the application, test conditions have good repeatability, and error accumulation caused by sensor drift or feedback delay in the closed-loop control is avoided, and the device can keep stable posture and does not have resonance amplification or position drift through counterweight balance and damping shock absorption design when swinging for a long time and at high frequency. BRIEF DESCRIPTION OF DRAWINGS

[0027] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed in the embodiments will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0028] Figure 1 FIG. 1 is a structural schematic diagram of a modular controllable swing device for heat transfer performance test of a loop heat pipe according to the present application;

[0029] Figure 2 FIG. 2 is a structural schematic diagram of a mounting platform according to the present application;

[0030] Figure 3 FIG. 3 is a control flowchart of a modular controllable swing device for heat transfer performance test of a loop heat pipe according to the present application.

[0031] The reference signs of the present application are as follows:

[0032] 1, base; 11, base plate; 12, support; 2, mounting platform; 21, rotating shaft; 22, adjustable clamp; 23, universal interface hole; 3, driving mechanism; 31, motor; 32, speed reduction gear set; 4, controller; 5, counterweight part; 6, shock pad; 7, human-machine interface; 8, safety protection unit; 9, test piece. DETAILED DESCRIPTION

[0033] The embodiments of the present application will be described in detail below with reference to the drawings.

[0034] The following detailed description is presented in terms of specific embodiments illustrating the applications. These descriptions and examples are provided as disclosure of the applications and are not intended to limit the scope of the applications. Furthermore, various omissions of structure and / or detail are done for the sake of clarity and conciseness and are not intended to limit the scope of the applications. Those skilled in the art will understand that the applications are capable of use in other contexts and with many modifications of structure and equivalent apparatus. Many embodiments of the applications are described in terms of steps or functions.

[0035] It is to be understood that the foregoing description is that of certain specific embodiments of the applications. Various omissions of structure and / or detail are done in order to avoid obscuring the applications. Those skilled in the art will understand that the applications are capable of use in other contexts and with many modifications of structure and equivalent apparatus. The description is thus to be considered as illustrative only and not restrictive of the scope of the applications. Applications encompass modifications and variations of the concepts disclosed herein as well as the equivalent thereof. It is intended to cover

[0036] It is also to be understood that the following description is only illustrative of the aspects of the embodiments within the scope of the appended claims. Various modifications of the examples described can be readily made by those of ordinary skill in the art, and the example described herein with reference to these embodiments does not limit the scope of the applications. The description is thus to be considered as given by way of illustration only and not by way of limitation.

[0037] Additionally, in the following description, numerous specific details are provided for a thorough understanding of the examples. One skilled in the relevant art will recognize, however, that the examples can be practiced without one or more of the specific details, or with other methods, components, materials, and so forth.

[0038] Patent number CN114740040A discloses a swing test section for the visualization study of heat pipe phase interfaces, which uses a six-degree-of-freedom swing table to simulate various spatial motion postures. This type of multi-degree-of-freedom platform has a complex structure and high cost. For applications that only require single-axis reciprocating swing to test the heat transfer performance of loop heat pipes, it appears to have redundant performance and is difficult to modify in a targeted manner; Patent number CN109752176B discloses a self-balancing tilt swing test bench. This type of device is mainly aimed at testing large-volume and large-mass specimens. The structure is relatively complex and is not suitable for small and medium-sized loop heat pipe test pieces. Patent number CN118999981A proposes a single-degree-of-freedom cosine swing table based on a rope-tethered cam drive. This design is targeted at specific waveform motions and lacks a modular universal installation interface, making it inconvenient for the replacement of different test pieces and multi-purpose expansion.

[0039] Based on this, this specification proposes a solution: Figure 1 As shown, a controllable swing device of the present invention is configured by rotatably arranging a mounting platform 2 between two brackets 12, with one end rotatably arranged on the corresponding bracket 12 via a rotating shaft 21, and an adjustable clamp 22 is installed on the mounting platform 2; a driving mechanism 3 is arranged on one side of the base 1 and is transmission-connected to the rotating shaft 21, and is used to drive the mounting platform 2 to swing periodically back and forth around the central axis of the rotating shaft 21 via the rotating shaft 21; a controller 4 is electrically connected to the driving mechanism 3, and is used to drive the driving mechanism 3 in an open-loop programmable control manner so that the mounting platform 2 swings within a preset angular velocity range, thereby overcoming the problems of complex structure, poor versatility, high cost, or reliance on closed-loop feedback of the swing platform in the prior art, and providing a platform with a simple structure, stability, reliability, and easy replacement of test pieces for performance testing of thermal heat transfer elements such as loop heat pipes in a simulated swinging environment.

[0040] The following describes the technical solutions provided by various embodiments of the present application in conjunction with the accompanying drawings.

[0041] like Figures 1 to 3 As shown, the present invention provides a modular controllable swing device for testing the heat transfer performance of a loop heat pipe, comprising a base 1, a mounting platform 2, a drive mechanism 3 and a controller 4; the base 1 comprises a substrate 11 and two brackets 12 relatively arranged on the substrate 11, for providing a mounting position; the mounting platform 2 is rotatably arranged between the two brackets 12, one end of which is rotatably arranged on the corresponding bracket 12 through a rotating shaft 21, and an adjustable clamp 22 is installed on the mounting platform 2; the drive mechanism 3 is arranged on one side of the base 1 and is transmission-connected to the rotating shaft 21, for driving the mounting platform 2 to perform periodic reciprocating swings around the central axis of the rotating shaft 21 through the rotating shaft 21; the controller 4 is electrically connected to the drive mechanism 3, for driving the drive mechanism 3 in an open-loop programmable control manner so that the mounting platform 2 swings within a preset angular velocity range.

[0042] The base 1 is used to place the modular controllable swing device for loop heat pipe heat transfer performance test steadily at the installation site, and the base plate 11 is a flat plate structure, and the two supports 12 are separately arranged on the upper surface of the base plate 11 and oppositely arranged.

[0043] Preferably, the two supports 12 are arranged in alignment, so that the installation platform 2 can be installed horizontally and linearly.

[0044] Preferably, the base plate 11 and the two supports 12 are both made of metal material. For example, the base plate 11 and the two supports 12 are both made of steel frame structure.

[0045] In some embodiments, the bottom corners of the base plate 11 are provided with supporting feet, so as to facilitate the stable installation of the base plate 11.

[0046] Further, a plurality of shock-absorbing pads 6 are arranged at the bottom end of the base 1, so as to avoid the swing of the loop heat pipe heat transfer performance test modular controllable swing device caused by the vibration of the base 1.

[0047] Preferably, a shock-absorbing pad 6 is arranged on each supporting foot at the bottom end of the base plate 11.

[0048] Preferably, the shock-absorbing pad 6 can be a rubber pad, so as to absorb the vibration force of the base 1.

[0049] In some embodiments, when the base 1 is not provided with supporting feet at the bottom end, the shock-absorbing pad 6 can be formed into a supporting foot of the base 1 by being arranged at the edge of the bottom end of the base 1.

[0050] Preferably, one end of the installation platform 2 is rotatably arranged on one support 12 through the outwardly protruding column and the bearing embedded in the support 12, and the other end is connected with the rotating shaft 21, so that the rotation of the rotating shaft 21 can drive the installation platform 2 to rotate.

[0051] For example, when the rotating shaft 21 rotates forward by half a circle, the installation platform 2 swings by half a circle following the rotating shaft 21, and when the rotating shaft 21 rotates reversely by half a circle, the installation platform 2 reversely swings by half a circle following the rotating shaft 21.

[0052] Preferably, the installation platform 2 is made of alloy metal structure and is in thick plate structure. The size of the installation platform 2 is larger than that of the test piece, so as to facilitate the installation of test pieces of different sizes.

[0053] In some embodiments, the rotating shaft 21 is rotatably arranged on one support 12 through the bearing, so as to reduce the friction.

[0054] Specifically, the support 12 is provided with a through hole, the bearing is embedded in the through hole, and the rotating shaft 21 is arranged in the bearing, so that the bearing can be rotatably arranged on the support 12.

[0055] In some embodiments, the adjustable clamp 22 includes two opposite sub-claws, which are symmetrically arranged on the mounting platform 2 to clamp the test piece.

[0056] In some embodiments, the two sub-claws are symmetrically arranged on the mounting platform 2, which facilitates the installation of the test piece in the middle of the mounting platform 2, and avoids the difference between the weights of the two ends of the rotating shaft 21 of the mounting platform 2.

[0057] In some embodiments, the mounting platform 2 is provided with a plurality of general interface hole positions 23 arranged in an array, and the adjustable clamp 22 is connected with the corresponding general interface hole position 23, so that the adjustable clamp 22 can clamp test pieces of different sizes.

[0058] In some embodiments, the general interface hole position 23 can be a general interface, which can expand the application range of the device.

[0059] In some embodiments, the general interface hole position 23 can be an array of regularly distributed threaded mounting holes, which can fix other types of samples to be tested (such as heat pipes, heat siphon pipes, electronic component heat dissipation modules, small fluid circuits, etc.) on the platform for oscillation test through different connecting accessories, so that the device can be applied to other thermal / fluid experiments that need to simulate periodic motion environment in addition to loop heat pipes, and has a certain universality.

[0060] In some embodiments, the size of the bottom end of the adjustable clamp 22 matches the size of the general interface hole position 23, so that the bottom end of the adjustable clamp 22 can be inserted into the corresponding general interface hole position 23 to realize the movement of the adjustable clamp 22.

[0061] In some embodiments, the adjustable clamp 22 is two, and is inserted into the symmetrically arranged general interface hole position 23, so as to clamp the test piece.

[0062] In some embodiments, the test piece can also be fixed by screwing the general interface hole position 23 on the mounting platform 2.

[0063] In some embodiments, smaller test pieces can be adapted by replacing adjustable clamps 22 of different sizes, so that test pieces of various specifications can be firmly installed and quickly replaced.

[0064] By providing the general interface hole position 23 and the adjustable clamp 22 on the mounting platform 2, different sizes and types of test pieces can be compatible through bolts or other fasteners, and the installation or disassembly of the test piece is facilitated by providing a quick locking mechanism or a bolt connection on the adjustable clamp 22, which improves the efficiency and universality of the replacement of the test piece.

[0065] In some embodiments, the adjustable clamps 22 clamping one side of the test piece are provided with a buffer layer for clamping the test piece.

[0066] The buffer layer has a certain elasticity or thickness, and after the two adjustable clamps 22 are inserted into the corresponding general interface hole 23, the buffer layer on the adjustable clamps 22 is concave under the extrusion of the test piece, so as to cope with test pieces of different sizes and increase the firmness of clamping the test piece.

[0067] The driving mechanism 3 includes a motor 31 and a speed reduction gear set 32. The motor 31 can be directly connected in transmission with the rotating shaft 21, or can be connected in transmission with the rotating shaft 21 through the speed reduction gear set 32.

[0068] The motor 31 is a stepping motor.

[0069] The transmission mode of the motor 31 and the rotating shaft 21 includes but is not limited to transmission shaft transmission connection, gear transmission, belt transmission and the like.

[0070] Preferably, the motor 31 is connected in transmission with the rotating shaft 21 through the speed reduction gear set 32, so as to improve the control accuracy of the motor 31 on the rotating shaft 21.

[0071] For example, the motor 31 connects the two-stage speed reduction gear set 32 through a shaft coupling, and the gear output shaft and the rotating shaft 21 are fixedly connected, so that when the motor 31 rotates, the installation platform 2 is driven to reciprocate around the rotating shaft 21 through speed reduction and torque increase.

[0072] Specifically, the speed reduction gear set 32 includes a pinion and a gear; the pinion is coaxially connected to the output shaft of the motor 31; the gear is coaxially connected to the rotating shaft 21 and is engaged with the pinion.

[0073] The gear reduction ratio is selected according to the required maximum angular velocity and torque, so that the platform swing angular velocity can cover the range of 0.5-5 rad / s.

[0074] In this embodiment, the swing motion is set as the angle change of the sine law to simulate the periodic tilt environment. For this purpose, the motor 31 is driven by the controller 4 to rotate forward and backward repeatedly, and the rotation angle corresponds to twice the amplitude of the platform swing angle (for example, the platform needs to reciprocate within ±15°, and then the motor 31 reciprocates ±15° through the output shaft after speed reduction). The entire transmission mechanism design has sufficient torsional stiffness and gap compensation measures to avoid excessive backlash impact when the swing direction changes.

[0075] The pinion is arranged on the output shaft of the motor 31, and the gear is arranged on the rotating shaft 21, so that the speed can be reduced and the torque can be increased, and the rotating speed of the rotating shaft 21 can be avoided.

[0076] The motor 31 can convert the rotating motion of the motor 31 into the back-and-forth swinging of the platform around the axis through the reduction gear set 32 or the connecting rod structure. The motor 31 can also provide a smooth and controllable torque output in cooperation with the reduction mechanism. The angular velocity can be adjusted by adjusting the input of the motor 31, from static to a maximum of about 5 rad / s, covering the required range of 0.5-5 rad / s. The angle range and frequency of the swing can be pre-set according to the test requirements, or changed by replacing the eccentric connecting rod or adjusting the driving program of the motor 31.

[0077] The installation platform 2, the rotating shaft 21 and the driving mechanism 3 form a single horizontal axis swinging mechanism, so that the installation platform 2 can swing back and forth around the fixed horizontal axis, and the swinging axis remains horizontal relative to the base 1, which can realize the test of the heat transfer performance of the loop heat pipe under different inclination angles in the gravitational field.

[0078] In some embodiments, the modular controllable swinging device for testing the heat transfer performance of the loop heat pipe further comprises a platform stabilizing structure, which comprises two counterweight parts 5 arranged symmetrically on the bottom end of the installation platform 2 to ensure that the installation platform 2 remains stable in posture during long-term repeated swinging.

[0079] The mass and position of the counterweight part 5 can be adjusted according to actual needs.

[0080] For example, after installing the loop heat pipe test piece, the platform can be kept centered in the absence of swinging by moving or replacing the counterweight block, so that the rotating shaft 21 is in force balance.

[0081] The counterweight part 5 is used to stabilize the installation platform 2, so that the center of gravity of the installation platform 2 is centered and the rotating shaft 21 is in force balance.

[0082] When the installation platform 2 drives the test piece to swing, the symmetric counterweight parts 5 reduce the unbalanced moment, reduce the load fluctuation of the motor 31 and prevent the accumulation of high-frequency vibration.

[0083] The platform stabilizing structure and the shock pad 6 together constitute a mechanical platform stabilizing mechanism. By setting adjustable counterweight blocks or balancing blocks at symmetric positions of the installation platform 2, the mass and center of gravity of the test piece are adjusted, so that the overall center of gravity of the installation platform 2 falls near the swinging axis when it is in the horizontal position, to reduce the unbalanced inertia moment during swinging; damping devices such as shock pads 6 are arranged at the contact between the base 1 and the ground to absorb and attenuate the vibration energy caused by reciprocating motion and resonance, preventing the platform from having too large an amplitude or gradually deviating from the pre-set central position.

[0084] The counterweight 5 and the damping pad 6 are pure passive devices, which can work without electronic sensor feedback, improve system reliability, are suitable for long-time continuous operation, and can effectively suppress resonance and cumulative displacement deviation in the continuous swing process during actual operation, ensuring smooth and safe test process.

[0085] Further, the controller 4 is an embedded programmable logic controller, and the controller 4 is configured to generate a target motion curve according to the swing input parameters after obtaining the swing input parameters, and send a control signal to the driving mechanism 3 according to the target motion curve, wherein the swing input parameters include one or more of the swing angle amplitude, the angular velocity, the swing period and the swing duration.

[0086] Specifically, the controller 4 uses a switch programmable control method to manage the operation of the motor 31, such as an embedded programmable logic controller 4, which has a swing control program written inside.

[0087] Before the test piece experiment, the user inputs the required swing parameters through the controller 4 panel, including the swing angle amplitude, the angular velocity, and the swing duration; the control program generates a target motion curve according to the input parameters, and outputs a control signal to the servo driver in a timely manner, and the motor 31 performs a swing action.

[0088] For example, the controller 4 sets the motor 31 output shaft to rotate forward at a constant angular velocity for one revolution, and then immediately reverses the rotation at the same angular velocity for one revolution, thereby driving the mounting platform 2 to realize reciprocating swing. In the whole process, the controller 4 does not read any sensor feedback, but only relies on pre-set logic operation, that is, open-loop control.

[0089] The controller 4 outputs a signal to directly drive the motor 31 to operate according to the predetermined speed-time curve, realizing the periodic reciprocating swing of the platform. Since the device mainly investigates the performance of the loop heat pipe under known swing conditions, there is no need for real-time closed-loop correction of the platform attitude, so the control system is simplified as an open-loop design, that is, it does not include real-time feedback sensors and complex control algorithms. Before the experiment, the angular velocity, acceleration curve and duration of the swing can be set in the controller 4 according to the needs, and after starting, the platform will strictly operate according to the programmed motion scheme. Open-loop control reduces system complexity and cost, and can ensure consistent motion conditions between cycles for periodic repeated motion. If you need to change the swing mode, you only need to modify the control program.

[0090] In some embodiments, the modular controllable oscillation device for loop heat pipe heat transfer performance test further comprises a human-machine interface 7 and a safety protection unit 8; the human-machine interface 7 is electrically connected with the controller 4; the safety protection unit 8 comprises an emergency stop button and a limit switch, the emergency stop button is connected with the driving circuit of the driving mechanism 3, and is used for controlling the start or stop of the driving mechanism 3; the limit switch is connected with the driving power supply of the driving mechanism 3.

[0091] The human-machine interface 7 is used for displaying the current oscillation angle, time and other information to provide the operator with start / stop instructions, and is also used for setting parameters and starting / stopping the test.

[0092] When the platform oscillation angle exceeds the limited range or an emergency occurs, the limit switch can cut off the driving power supply of the motor 31, and the emergency stop button can also manually brake in an emergency to protect the time and equipment safety.

[0093] The operation process of the present application is as follows: the loop heat pipe test piece to be tested is fixed on the installation platform 2, the evaporation end is heated, and the cooling device is connected to the condensation end to establish a heat transfer cycle, then the controller 4 is started to start oscillation, the installation platform 2 reciprocates on the horizontal axis according to the preset angular velocity and period, the test piece manages the simulated oscillation environment, the temperature, start-up performance and steady-state heat transfer performance are obtained by the temperature sensor and other measurement systems arranged on the test piece, since the oscillation conditions of the device are repeatable and controllable, the data of each test has good comparability and reproducibility, which helps to study the heat transfer characteristics of the loop heat pipe under different oscillation frequencies and amplitudes.

[0094] The device of the present application can also be applied to other fields, which can be used for performance test of other engineering devices in a periodic motion environment without changing the main structure of the device, only by replacing the adjustable clamp 22 of the installation platform 2.

[0095] For example, by installing a specific adjustable clamp 22 on the installation platform 2 to fix an electronic equipment heat dissipation module, the device can be used to test the change of the heat dissipation efficiency of the module under the inclined swinging working condition.

[0096] For another example, a small fluid circuit system is installed, and the flow and heat transfer of the fluid in the reciprocating inclination can be studied. Since the platform interface of the present application has high compatibility, only the corresponding installation adjustable clamp 22 or connecting plate needs to be designed for different test pieces, and the function of the present application can be expanded.

[0097] The open-loop program of the controller 4 can also be adjusted according to new experimental requirements, for example, setting a non-sinusoidal oscillation motion mode or introducing a short stay period, so as to be more suitable for specific application scenarios. It can be seen that the device of the present application has certain universal experimental platform value.

[0098] Compared with the prior art, the present application has the following technical effects:

[0099] 1. Modular design, strong versatility: The installation platform 2 of the device adopts a modular replaceable design, which can adapt to loop heat pipe test pieces of different sizes and types. Compared with the existing solution that requires a specially customized platform, the device greatly improves the versatility and test piece replacement efficiency of the test platform.

[0100] 2. Simple structure, low cost: The present application only realizes the reciprocating swing of a single horizontal axis, avoiding complex mechanisms and redundant control degrees of freedom in multi-degree-of-freedom platforms. By using open-loop programmable control instead of closed-loop servo systems, the use of sensors and high-performance controllers 4 is reduced, reducing system complexity and manufacturing and maintenance costs. Compared with large-scale swing platforms that use multiple hydraulic cylinders or complex parallel mechanisms, the device has a compact structure, low failure rate, and easy maintenance.

[0101] 3. Easy to control, high reliability: Using open-loop pre-programmed control, the test conditions are highly repeatable, avoiding error accumulation caused by sensor drift or feedback delay in closed-loop control. The control system is simple and intuitive, and users can flexibly set parameters such as swing speed and period according to test needs.

[0102] 4. Stable mechanism effectively suppresses vibration: The present application uses counterweight balancing and damping vibration reduction design to ensure that the platform remains stable in attitude during long-term, high-frequency swinging, without resonance amplification or position drift.

[0103] 5. Specialized and widely applicable: The device was initially developed to meet the needs of loop heat pipe heat transfer performance testing in a swing environment, and has strong specificity. At the same time, the high adaptability of the platform interface also makes it have certain potential for extended application, and can serve other thermal / fluid mechanics experiments.

[0104] In this specification, the same or similar parts between various embodiments are cross-referenced, and each embodiment focuses on the differences from other embodiments. In particular, for the product embodiment described later, since it corresponds to the method, the description is relatively simple, and the relevant parts are described in the system embodiment.

[0105] The above is merely a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any changes or replacements within the technical scope disclosed in the present application can be easily thought of by those skilled in the art, and should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A modular controllable oscillating device for testing the heat transfer performance of a loop heat pipe, characterized in that: include: A base, comprising a substrate and two brackets arranged opposite to each other on the substrate; A mounting platform, the mounting platform being rotatably disposed between the two brackets, one end of which is rotatably disposed on the corresponding bracket via a rotating shaft, and an adjustable clamp being installed on the mounting platform; a driving mechanism, the driving mechanism being disposed on one side of the base and being in transmission connection with the rotating shaft, and being configured to drive the mounting platform to perform periodic reciprocating swings around the central axis of the rotating shaft via the rotating shaft; A controller is electrically connected to the driving mechanism and is used to drive the driving mechanism in an open-loop programmable control manner so that the mounting platform swings within a preset angular velocity range.

2. The modular controllable swing device for testing the heat transfer performance of a loop heat pipe according to claim 1, characterized in that: Also includes: The platform stabilizing structure includes two counterweight parts, which are arranged opposite to each other at the bottom ends of the mounting platform and symmetrically arranged with respect to the mounting platform.

3. The modular controllable swing device for testing the heat transfer performance of a loop heat pipe according to claim 2, characterized in that: Also includes: A plurality of shock-absorbing pads are arranged at the bottom edge or four corners of the base, and are used to isolate and absorb vibrations transmitted from the base to the ground.

4. The modular controllable swing device for testing the heat transfer performance of a loop heat pipe according to any one of claims 1 to 3, characterized in that: The installation platform is provided with a plurality of universal interface holes arranged in an array, and the clamps are correspondingly connected with the universal interface holes.

5. The modular controllable swing device for testing the heat transfer performance of a loop heat pipe according to any one of claims 1 to 3, characterized in that: The rotating shaft is rotatably arranged on the bracket via a bearing.

6. The modular controllable swing device for testing the heat transfer performance of a loop heat pipe according to any one of claims 1 to 3, characterized in that: The driving mechanism comprises: A motor is connected to the rotating shaft in a transmission manner.

7. The modular controllable swing device for testing the heat transfer performance of a loop heat pipe according to claim 6, characterized in that: The motor is connected to the rotating shaft through a reduction gear set.

8. The modular controllable swing device for testing the heat transfer performance of a loop heat pipe according to claim 7, characterized in that: The reduction gear set includes a pinion and a gear; the pinion is coaxially connected to the output shaft of the motor; the gear is coaxially connected to the rotating shaft and meshes with the pinion.

9. The modular controllable swing device for testing the heat transfer performance of a loop heat pipe according to any one of claims 1 to 3, characterized in that: The controller is an embedded programmable logic controller, and is configured to, after obtaining the swing input parameters, generate a target motion curve based on the swing input parameters, and send a control signal to the drive mechanism using the target motion curve, wherein the swing input parameters include one or more of the swing angle amplitude, angular velocity, swing period and swing duration.

10. The modular controllable swing device for testing the heat transfer performance of a loop heat pipe according to claim 9, characterized in that: It also includes a human-machine interface and a safety protection unit; the human-machine interface is electrically connected to the controller; the safety protection unit includes an emergency stop button and a limit switch, the emergency stop button is connected to the drive circuit of the drive mechanism, and is used to control the start or stop of the drive mechanism; the limit switch is connected to the drive power supply of the drive mechanism.

Images