Multi-factor coupled two-degree-of-freedom testing device and centrifugal machine

Abstract

The invention relates to the technical field of centrifugal machines, in particular to a multi-factor coupling two-degree-of-freedom testing device and a centrifugal machine. The multi-factor coupled two-degree-of-freedom testing device comprises a rolling frame, an x-direction mounting hole and a y-direction mounting hole are formed in the rolling frame, a high-low temperature box is rotationally assembled at the x-direction mounting hole, a driving device is arranged in the rolling frame, and a transmission mechanism is arranged between the driving device and the high-low temperature box to drive the high-low temperature box to rotate around the axis of the x-direction mounting hole; the y-direction mounting hole is used for being connected with external driving equipment so that the rolling frame and the high-low temperature box can rotate around the axis of the y-direction mounting hole, and a to-be-tested product is placed in the high-low temperature box. The centrifugal machine comprises a machine body and the multi-factor coupling two-degree-of-freedom testing device installed on the machine body. Through multi-physical coupling control, the comprehensive test capability of the product in an extreme environment is realized, the actual performance of the tested product is comprehensively reflected, and the reliability of a test result is ensured.

Description

Technical Field

[0001] The invention relates to the technical field of centrifuges, and in particular to a multi-factor coupled two-degree-of-freedom testing device and a centrifuge. Background Art

[0002] The two-degree-of-freedom centrifuge roll frame is a key mechanical device used to provide balance and stability during the operation of the centrifuge. It is adjusted through two independent rotation axes (usually the pitch axis and the roll axis) to ensure the balance of the centrifuge when it rotates at high speed, thereby reducing vibration and noise, improving separation efficiency and equipment life, and is widely used in test equipment in the fields of aviation, aerospace, navigation, weapons and medical treatment.

[0003] The existing two-degree-of-freedom centrifuge rolling frame has the following characteristics: (1) Structural design: The roll frame is welded from high-strength structural steel plates, and its frame is an octagonal annular cavity surrounded by an outer skin, an inner skin, and a cover plate. This octagonal structural design is designed to solve the eccentric torque problem caused by eccentricity when used in a high-g acceleration field, ensuring that the intersection of the roll axis and the pitch axis coincides with the theoretical center of mass of the roll frame.

[0004] (2) Mounting hole configuration: Two roll axis mounting holes are symmetrically arranged on the frame, and small shaft sleeves are arranged in these holes; two pitch axis mounting holes are symmetrically arranged on the side wall perpendicular to the line connecting the two roll axis mounting holes, and large shaft sleeves are arranged in the holes. This configuration ensures the front-to-back and left-to-right symmetry of the device.

[0005] (3) Internal layout: Multiple wire tubes and multiple fixed ribs are set in the cavity between the outer skin and the inner skin, and the fixed ribs are provided with mounting holes. The cavity is divided into two evenly spaced layers by horizontally arranged partitions, and wire tubes are symmetrically arranged in each cavity. This not only realizes the isolation of strong and weak current wiring of the system, but also maintains the appearance of beauty and neatness.

[0006] (4) Enhanced rigidity and stability: By setting rounded chamfers at the corners, the safety and durability of the structure are improved. At the same time, a stepped cylindrical structure and its corresponding ribs are set outside the large and small sleeves to further enhance the torsional rigidity and local mechanical properties.

[0007] (5) Weight reduction measures: Various weight reduction measures are adopted without affecting the structural strength, such as setting weight reduction holes in the fixed ribs, partitions, steps of the large shaft sleeve, inner skin reinforcement plates, cover reinforcement plates, etc., to reduce the weight of the entire frame.

[0008] The structure of the above-mentioned two-degree-of-freedom centrifuge roll frame is similar to a roll frame structure for a high-g value three-degree-of-freedom centrifuge disclosed in the Chinese invention patent with the authorization announcement number CN110823619B. In actual use, the object to be tested is installed in the roll frame, and the performance of the object to be tested under different g values ​​is simulated by controlling the rolling motion of the roll frame and the pitching motion of the object to be tested. However, for practical applications, especially in the fields of aerospace, military equipment, automotive engineering, etc., the product needs to withstand a complex mechanical environment, such as alternating high and low temperatures, high overload, low air pressure, etc., and only testing the performance of the product under the single factor of different g values ​​is difficult to fully reflect the performance of the product in practical applications, and the reliability of the test results is low. Therefore, it is necessary to design a device that can simulate multiple extreme conditions to perform all-round testing on the object to be tested. Summary of the invention

[0009] The purpose of the present invention is to provide a two-degree-of-freedom testing device and a centrifuge with multi-factor coupling to solve the technical problems that the existing devices can only test the performance of the object under a single factor, it is difficult to fully reflect the actual performance of the object, and the reliability of the test results.

[0010] In order to solve the above problems, the present invention provides a two-degree-of-freedom testing device with multi-factor coupling, which adopts the following technical solutions: A two-degree-of-freedom testing device with multi-factor coupling includes a rolling frame, characterized in that the rolling frame is provided with an x-direction mounting hole and a y-direction mounting hole, a high and low temperature box is rotatably mounted at the x-direction mounting hole, a driving device is provided in the rolling frame, and a transmission mechanism is provided between the driving device and the high and low temperature box to drive the high and low temperature box to rotate around the axis of the x-direction mounting hole; the y-direction mounting hole is used to connect an external driving device to realize the rotation of the rolling frame and the high and low temperature box around the axis of the y-direction mounting hole, and the high and low temperature box is used to place a product to be tested.

[0011] The beneficial effects of the present invention are as follows: by connecting the rolling frame to the driving device, the present invention can cooperate with the driving device to realize the posture adjustment of the high and low temperature box in the x-direction and y-direction. At the same time, the high and low temperature box can be precisely controlled in terms of temperature, and has the ability to work alone and in combination. It can test the influence of the single factor of temperature, and can also be combined with the rolling frame to at least test the effect of the combined action of temperature and acceleration. At the same time, in practical applications, the high and low temperature box can also be combined with other equipment to realize multi-factor coupling testing. The present invention integrates the two-degree-of-freedom rolling frame with the high and low temperature box, and can realize comprehensive testing capabilities in extreme environments through multi-physical coupling control, comprehensively reflect the actual performance of the object being tested, and ensure the reliability of the test results.

[0012] Furthermore, the rolling frame is a symmetrical structure with a U-shaped symmetrical opening, the high and low temperature box part is located inside the U-shaped symmetrical opening, and the door of the high and low temperature box is located outside the U-shaped symmetrical opening; the x-direction mounting holes are symmetrically arranged on both sides of the U-shaped symmetrical opening and are located at the end of the U-shaped symmetrical opening.

[0013] Beneficial effects: The use of a symmetrical rolling frame can ensure uniform distribution of centrifugal force during rotation, reduce eccentricity, improve the accuracy of posture adjustment, and reduce the risk of vibration and deformation caused by overload acceleration; in addition, the provision of a U-shaped symmetrical opening is convenient for opening and closing the high and low temperature box door on the one hand, and on the other hand, compared with the prior art, while meeting the test requirements, it saves the size of the rolling frame, thereby reducing the manufacturing cost of the rolling frame, and can save the space occupied by the centrifuge in actual application.

[0014] Furthermore, the driving device is provided with two sets, which are symmetrically arranged on both sides of the U-shaped symmetrical opening.

[0015] Beneficial effect: The use of two sets of symmetrically arranged drive devices can ensure the balance and stability of the entire test device during operation, avoid the imbalance problem caused by unilateral drive, and thus improve the reliability and test accuracy of the test device.

[0016] Furthermore, the transmission mechanism is a gear transmission mechanism, an x-direction short shaft is installed in the x-direction mounting hole, and a hydraulic slip ring is installed in the x-direction short shaft; the gear transmission mechanism includes a driving gear and a driven gear that are meshed with each other, the driving gear is located in the U-shaped symmetrical opening, the driving device includes a motor connected to the driving gear, the fixed end of the hydraulic slip ring extends into the high and low temperature box and is sealed with the high and low temperature box, and the rotating end of the hydraulic slip ring is detachably connected to the x-direction short shaft; one side of the driven gear is detachably connected to the high and low temperature box, and the other side is detachably connected to the x-direction short shaft.

[0017] Beneficial effects: The gear transmission mechanism can provide efficient and stable power transmission. The hydraulic slip ring can avoid the entanglement of cables and add appropriate refrigerant to the high and low temperature box to ensure the stability of the internal environment of the high and low temperature box, while realizing the reliable connection between the high and low temperature box and the gear transmission mechanism.

[0018] Furthermore, the rolling frame has a U-shaped symmetrical inner cavity separated from the U-shaped symmetrical mouth, and the U-shaped symmetrical inner cavity is provided with two layers of partitions arranged in parallel and spaced apart from each other to evenly divide the U-shaped symmetrical inner cavity into an upper cavity, a middle cavity and a lower cavity, and the partition is provided with a plurality of wire passing holes, the motor is fixed in the middle cavity, and the rolling frame is provided with a second wire passing hole connected to the middle cavity.

[0019] Beneficial effects: The space inside the rolling frame can be reasonably utilized, which is conducive to the realization of strong and weak isolation wiring. In addition, the partition, as a supporting structure, can enhance the overall rigidity of the U-shaped symmetrical inner cavity, especially when it is subjected to a large load or rotates rapidly, and can effectively prevent the frame from deformation and maintain the integrity of the structure.

[0020] Furthermore, the rolling frame includes an outer plate, an inner plate and a cover plate, the outer plate and the inner plate are both U-shaped plates, the cover plate is connected to the top and bottom of the outer plate and the inner plate to form the U-shaped symmetrical inner cavity together with the outer plate and the inner plate; the partition plate is connected to the outer plate and the inner plate, the corners of the outer plate are chamfered, and the corners of the inner plate are provided with internal reinforcing ribs.

[0021] Beneficial effects: The chamfering treatment is adopted at the corners of the outer panel, which can not only effectively disperse the stress, reduce the local stress peak, improve the safety and durability of the structure, but also reduce the friction generated with the air during rotation; the inner panel is provided with an inner reinforcing rib plate at the corner, which can significantly increase the rigidity of the inner panel, reduce the eccentricity and vibration, prevent deformation or damage caused by uneven force, and improve the accuracy and stability of posture adjustment.

[0022] Furthermore, a y-direction mounting sleeve is provided at the y-direction mounting hole, and the y-direction mounting sleeve is connected to each layer of partition, outer plate and inner plate; a plurality of y-direction reinforcing rib plates are provided in the U-shaped symmetrical inner cavity in the circumferential direction around the y-direction mounting sleeve, and the plurality of y-direction reinforcing rib plates are respectively distributed in the upper cavity, middle cavity and lower cavity, and each y-direction reinforcing rib plate is provided with a through hole.

[0023] Beneficial effects: The rigidity and strength of the entire rolling frame are increased, and the torsional resistance and overall stability of the rolling frame are further improved; a through hole is opened on the Y-direction reinforcing rib plate, which can reduce weight on the one hand, and can also be used for threading on the other hand, and can also be used as a vent to avoid the formation of a sealed cavity during welding, thereby reducing welding deformation and structural strength loss.

[0024] Furthermore, an inspection opening is provided on the outer plate at a position corresponding to the motor, and an inspection cover is detachably connected to the inspection opening.

[0025] Beneficial effects: The inspection cover can protect the motor, prevent foreign matter from entering the device, protect the motor from the influence of harsh environment, and ensure the normal operation of the motor; by removing the inspection cover, it is convenient to inspect the motor.

[0026] Furthermore, the outer plate and / or the inner plate are provided with positioning steps for positioning and installing the cover plate.

[0027] Beneficial effect: It is convenient for the quick assembly of the rolling frame.

[0028] The technical solution of the centrifuge of the present invention is: The centrifuge comprises a body and a testing device installed on the body, wherein the testing device adopts a two-degree-of-freedom testing device with multi-factor coupling in any of the above technical solutions.

[0029] The beneficial effect of the centrifuge of the present invention is that the centrifuge of the present invention can apply multiple extreme conditions simultaneously or sequentially in one experiment, simulate the real working environment of the product, test the results when multiple factors act on the product together, and fully reflect the real performance of the object being tested. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a schematic diagram of the three-dimensional structure of the multi-factor coupled two-degree-of-freedom testing device of the present invention; Figure 2 for Figure 1 Top view of the (without the hydraulic slip ring on one side); Figure 3 for Figure 1 AA section view; Figure 4 for Figure 1 BB cross-sectional view; Figure 5 for Figure 1 A schematic diagram of the three-dimensional structure of the middle rolling frame; Figure 6 for Figure 5 A top view of Figure 7 It is a structural schematic diagram of the x-axis sleeve; Figure 8 It is a schematic diagram of the structure of the Y-axis mounting sleeve; Fig. 9 It is a structural schematic diagram of a hydraulic slip ring; Fig.10 A schematic diagram showing the transmission coordination between the motor, hydraulic slip ring, x-axis sleeve, and high and low temperature boxes.

[0031] Description of reference numerals: 1. Rolling frame; 2. High and low temperature box; 3. Outer plate; 4. Inner plate; 5. First partition; 6. Second partition; 7. X-direction mounting hole; 8. Y-direction mounting hole; 9. X-direction bushing; 10. Y-direction mounting sleeve; 11. Motor; 12. Reducer; 13. Driving gear; 14. Driven gear; 15. Hydraulic slip ring; 16. First threading hole; 17. Second threading hole; 18. Y-direction reinforcing rib plate; 19. Cover plate; 20. Positioning step; 21. Wire hole; 22. X-direction reinforcing rib plate; 23. Inner reinforcing rib plate; 24. Box door; 25. U-shaped symmetrical opening; 26. Inspection cover; 27. Inspection opening; 28. Support plate; 29. ​​X-direction short axis; 30. Through hole. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Those skilled in the art should know that the embodiments described below are part of the embodiments of the present disclosure, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0033] The principle and spirit of the present invention are explained in detail below with reference to several representative embodiments of the present invention.

[0034] Embodiments of the multi-factor coupled two-degree-of-freedom testing device provided by the present invention: like Figure 1 As shown, a two-degree-of-freedom testing device with multiple-factor coupling includes a rolling frame 1 and a high and low temperature box 2 assembled on the rolling frame 1 and rotating around the x-axis direction.

[0035] Among them, the rolling frame 1 is used as a whole to connect to the external driving device to realize the overall rotation around the y-axis. The high and low temperature box 2 is a prior art, model TDF2700C-10ESS, which is used to place the industrial products to be tested, mainly to realize the reliability test of industrial products in high and low temperature environments, and to test the various performance indicators of the parts and materials of industrial products under high and low temperature cycle changes. The combined test of the rolling frame 1 and the high and low temperature box 2 can simulate a variety of complex physical environments and working conditions, and is particularly suitable for scenarios that need to consider mechanical stress (such as centrifugal force) and temperature changes at the same time.

[0036] Specifically, Figure 5 and Figure 6 As shown, the rolling frame 1 in this embodiment is U-shaped as a whole, and is a symmetrical structure formed by welding of sheet metal. The rolling frame 1 includes an outer plate 3, an inner plate 4 and a cover plate 19. The outer plate 3 and the inner plate 4 are U-shaped as a whole, and a U-shaped symmetrical opening 25 is formed inside the inner plate 4. The high and low temperature box 2 is installed at the U-shaped symmetrical opening 25, and is partially located inside the U-shaped symmetrical opening 25. The door 24 of the high and low temperature box 2 is located outside the U-shaped symmetrical opening 25. The design of the U-shaped symmetrical opening 25 is not only convenient for opening and closing the door 24 of the high and low temperature box 2, but also can save the size of the rolling frame 1 while meeting the test requirements, thereby reducing the manufacturing cost of the rolling frame 1. This structural design takes into account the convenience of placing and removing the high and low temperature box 2, while ensuring the symmetry of the overall structure, which helps to achieve the balance and stability of the rolling frame 1. The top and bottom of the outer plate 3 and the inner plate 4 are welded to the cover plate 19. To facilitate the quick installation of the cover plate 19, as shown in FIG. Figure 5 and Figure 7As shown, positioning steps 20 are respectively provided on the upper and lower sides of the inner plate 4, and the end of the cover plate 19 abuts against the positioning steps 20 when installed. Of course, the positioning steps 20 can also be provided on the outer plate 3. The upper and lower cover plates 19, the outer plate 3 and the inner plate 4 together form a U-shaped symmetrical inner cavity, and the U-shaped symmetrical inner cavity is separated from the U-shaped symmetrical opening 25.

[0037] like Figure 7 As shown, both the inner plate 4 and the outer plate 3 are provided with x-direction through holes, and an x-direction shaft sleeve 9 is clamped between the two plates on the same side of the inner plate 4 and the outer plate 3, and the inner hole of the x-direction shaft sleeve 9 forms an x-direction mounting hole 7, and the two x-direction mounting holes 7 are symmetrically arranged on the left and right sides of the U-shaped symmetrical opening 25 and located at the end of the U-shaped symmetrical opening 25. Figure 4 As shown, each x-direction mounting hole 7 is rotatably mounted with an x-direction short shaft 29, and a hydraulic slip ring 15 is mounted in the x-direction short shaft 29. Figure 8 As shown, the x-axis sleeve 9 is provided with a first threading hole 16. The hydraulic slip ring 15 is a prior art, and its structure and working principle are not described in detail.

[0038] The U-shaped symmetrical inner cavity is provided with two layers of partitions arranged in parallel and spaced apart from each other. Figure 4 As shown, there are a first partition plate 5 located on the upper side and a second partition plate 6 located on the lower side, and a plurality of wire holes 21 are provided on the first partition plate 5 and the second partition plate 6. The first partition plate 5 and the second partition plate 6 evenly divide the U-shaped symmetrical inner cavity into an upper cavity, a middle cavity and a lower cavity, and the height of the upper cavity and the lower cavity are the same. The two sides of the first partition plate 5 and the second partition plate 6 are respectively welded to the inner plate 4 and the outer plate 3. This partitioning method not only reasonably utilizes the internal space, but also facilitates wiring. The multiple wire holes 21 on the two layers of partitions allow wires, cables, etc. to pass through, meeting the wiring requirements.

[0039] like Figure 3 and Figure 5 As shown, the inner plate 4 and the outer plate 3 are each provided with a y-direction mounting hole 8, and a y-direction mounting sleeve 10 is installed at the position of the y-direction mounting hole 8. The structure of the y-direction mounting sleeve 10 is as shown in FIG. Fig. 9 As shown, a support plate 28 is connected between it and the upper cover plate 19 and between the y-direction mounting sleeve 10 and the lower cover plate 19 respectively. The y-direction mounting sleeve 10 is also connected to the first partition plate 5 and the second partition plate 6 at the same time.

[0040] like Figure 3As shown, six y-direction reinforcing ribs 18 are arranged in the circumferential direction around the y-direction mounting sleeve 10 in the U-shaped symmetrical inner cavity, which further improves the anti-torsion ability and overall stability of the rolling frame 1. A through hole 30 is opened on each y-direction reinforcing rib 18, and the shape and size of the through hole 30 can be optimized according to the specific wiring and weight reduction requirements, such as circular, elliptical or rectangular. The setting of the through hole 30 not only reduces the weight of the structure, but also provides convenience for internal wiring and maintenance. It can also serve as a vent to avoid the formation of a sealed cavity during welding, reduce welding deformation and structural strength loss, and improve the practicality and reliability of the overall design. Among them, two y-direction reinforcing ribs 18 are located in the upper cavity, arranged in an inclined manner, and arranged symmetrically with respect to the upper support plate 28. The two y-direction reinforcing ribs 18 are simultaneously connected to the first partition plate 5, the inner plate 4, the outer plate 3 and the cover plate 19 on the upper side. Two y-direction reinforcing ribs 18 are located in the middle cavity, arranged vertically, and arranged symmetrically about the axis of the y-direction mounting sleeve 10. The two y-direction reinforcing ribs 18 are simultaneously connected to the first partition 5, the inner plate 4, the outer plate 3, and the second partition 6. The remaining two y-direction reinforcing ribs 18 are located in the lower cavity, arranged obliquely, and arranged symmetrically about the lower support plate 28. The two y-direction reinforcing ribs 18 are simultaneously connected to the second partition 6, the inner plate 4, the outer plate 3, and the cover plate 19 at the lower side. The two y-direction reinforcing ribs 18 in the lower cavity and the two y-direction reinforcing ribs 18 in the upper cavity are vertically symmetrical about the two y-direction reinforcing ribs 18 in the middle cavity.

[0041] In this embodiment, Figure 5 As shown, the two corners of the outer plate 3 are chamfered, and a second threading hole 17 communicating with the middle cavity is provided at the chamfered position. Internal reinforcing ribs 23 are provided at the two corners of the inner plate 4. A plurality of x-direction reinforcing ribs 22 arranged at intervals are also provided between the first partition 5 and the upper cover plate 19, and between the second partition 6 and the lower cover plate 19. The chamfering of the outer plate 3 can reduce stress concentration and enhance safety and durability; the provision of the internal reinforcing ribs 23 further enhances the torsional stiffness and local mechanical properties of the inner plate 4; the x-direction reinforcing ribs 22 can enhance the stiffness of the rolling frame 1 as a whole. Through these technical means, the rolling frame 1 can better withstand extreme conditions such as high temperature, low temperature, and high overload in actual use, ensuring the reliability and stability of the test device.

[0042] Two sets of driving devices are arranged symmetrically on the left and right sides of the U-shaped symmetrical opening 25 in the middle cavity, and a transmission mechanism is also provided between each driving device and the high and low temperature box 2. Figure 2 and Fig.10As shown, the driving device includes a motor 11, the motor 11 is connected to a reducer 12, and a gear transmission mechanism is connected between the reducer 12 and the high and low temperature box 2. The gear transmission mechanism includes a driving gear 13 and a driven gear 14 that mesh with each other, and the driving gear 13 is located in the U-shaped symmetrical opening 25 and is connected to the output end of the reducer 12. The diameter of the driven gear 14 is smaller than the diameter of the driving gear 13. The fixed end of the hydraulic slip ring 15 extends into the high and low temperature box 2 and seals with the high and low temperature box 2, and the rotating end of the hydraulic slip ring 15 is detachably connected to the x-direction short shaft 29 through multiple bolts evenly distributed around the circumference. One side of the driven gear 14 is detachably connected to the high and low temperature box 2 through multiple bolts evenly distributed around the circumference, and one side is detachably connected to the x-direction short shaft 29 through multiple bolts evenly distributed around the circumference. By adopting two sets of symmetrically arranged driving devices, the test device of the present application can maintain good balance and stability during operation, avoiding the imbalance problem that may be caused by unilateral drive. As a result, the reliability and test accuracy of the test device are improved, and the accuracy and consistency of the test results are ensured.

[0043] Of course, the driving device can be in other forms, such as a hydraulic driving device or a pneumatic driving device. The hydraulic driving device can be connected to the high and low temperature box 2 through a hydraulic cylinder, and the high and low temperature box 2 can be rotated by the pressure of the hydraulic oil. The pneumatic driving device can be connected to the high and low temperature box 2 through a rotating cylinder, and the high and low temperature box 2 can be rotated by the pressure of compressed air. The selection of these driving devices can be adjusted according to the needs of specific applications to meet different testing requirements.

[0044] An inspection port 27 is provided on the outer plate 3 at the position corresponding to the motor 11, and an inspection cover 26 is detachably connected to the inspection port 27. The inspection cover 26 plate 19 can be fixed to the inspection port 27 by bolt connection or snap connection to ensure that it can be easily disassembled when needed. In addition, the inspection cover 26 plate 19 can adopt a sealing design to prevent dust and foreign matter from entering the interior of the device and protect the normal operation of the motor 11 and other internal components. The size of the inspection port 27 should be designed according to the size of the motor 11 and the specific maintenance requirements to ensure that the operator can smoothly carry out the maintenance work. In order to further improve the convenience of maintenance, a mark can be set at the inspection port 27 to indicate the location and opening method of the inspection port 27. By setting the inspection port 27 and the inspection cover 26 plate 19, a more efficient motor 11 maintenance method is provided, which avoids the cumbersome process of disassembling the entire device for maintenance in the traditional design. As a result, the time and labor cost of maintenance and overhaul are greatly reduced, and the overall operating efficiency and reliability of the device are improved. Compared with the prior art, the present application significantly simplifies the operation steps of the motor 11 maintenance, and improves the convenience and efficiency of the maintenance work.

[0045] The multi-factor coupled two-degree-of-freedom testing device of the present invention can perform a variety of combined tests, such as: Mechanical performance testing in extreme environments. High temperature and high gravity are superimposed to simulate the performance of equipment or materials in high temperature and high gravity environments. For example, in the aerospace field, some components need to work under high temperature (such as near the engine compartment) and high gravity (such as the acceleration stage of a rocket). Low temperature and high gravity are superimposed to simulate the material performance under the combined effects of low temperature (such as in space environments or high altitudes) and high gravity (such as acceleration or deceleration processes). For example, test the structural stability of satellite or aircraft components under low temperature and high gravity conditions.

[0046] Combined effects of vibration and temperature cycling. Temperature cycling coupled with vibration simulates the durability of equipment under the combined effects of temperature changes (such as rapid switching from high to low temperatures) and vibrations (such as mechanical vibrations caused by centrifugal force). For example, testing the performance of automobile or high-speed rail components in different seasons and road conditions. Thermal expansion and contraction and mechanical stress. Changing the temperature in the high and low temperature chamber 2 causes the material to expand and contract, while the centrifugal force generated by the centrifuge applies additional mechanical stress. This combination can study the deformation, fatigue or failure behavior of materials under the action of thermomechanical coupling.

[0047] Study of fluid behavior under complex working conditions. The flow characteristics of high-temperature and high-pressure fluids will change significantly under the action of centrifugal force. Combined with the high and low temperature box 2, the flow laws of fluids in high-speed rotation or complex pipelines under high or low temperature environments can be studied. The coupling effect of phase change and flow, simulates the phase change (such as liquefaction or gasification) of fluids under high or low temperature conditions and the flow behavior accompanying the phase change process. For example, the performance of coolants under extreme temperatures and mechanical stresses is studied in energy equipment.

[0048] In addition, during actual use, a vacuum pump or other equipment may be connected to the high and low temperature box 2 to simulate the temperature resistance of the product in a low pressure environment.

[0049] Of course, the tests performed by the multi-factor coupled two-degree-of-freedom test device of the present invention are not limited to the above. The high and low temperature box 2 has the ability to work alone and in combination, and can test the influence of a single factor separately, and can also evaluate the effect of multiple factors acting together, providing a flexible test scheme. This versatility enables the entire test device to apply multiple extreme conditions simultaneously or sequentially in one experiment, realizing the function of performing two-degree-of-freedom testing on the product to be tested in a multi-factor coupled environment, which can fully reflect the actual performance of the object to be tested and ensure the reliability of the test results.

[0050] The embodiment of the centrifuge provided by the present invention: The centrifuge includes a body and a testing device installed on the body. The structure of the testing device is the same as that of the multi-factor coupled two-degree-of-freedom testing device in the above embodiment, and will not be described in detail here.

[0051] The centrifuge is equipped with a two-degree-of-freedom test device with multiple factors coupling, which enables the centrifuge to conduct comprehensive tests on products under various extreme conditions. The test device can simulate different environmental factors, such as high temperature, low temperature, high overload and low air pressure, thereby improving the reliability of the test results. The two-degree-of-freedom test device with multiple factors coupling plays a key role in the centrifuge. It simulates complex mechanical environments through two-degree-of-freedom motion to ensure that the performance of the product under various extreme conditions is fully evaluated.

[0052] According to the above description of this specification, those skilled in the art may also understand that the terms used below, such as "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside" and the like, which indicate orientation or positional relationships, are based on the orientation or positional relationships shown in the drawings of this specification, and are only for the purpose of facilitating the explanation of the scheme of the present invention and simplifying the description, rather than explicitly or implicitly indicating that the device or element involved must have the specific orientation, be constructed and operate in a specific orientation. Therefore, the above-mentioned orientation or positional relationship terms cannot be understood or interpreted as limitations on the scheme of the present invention.

[0053] In addition, in the description of this specification, “plurality” means at least two, for example, two, three or more, etc., unless otherwise clearly and specifically defined.

[0054] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A two-degree-of-freedom test device with multi-factor coupling, comprising a rolling frame, characterized in that: The rolling frame is provided with an x-direction mounting hole and a y-direction mounting hole, and a high and low temperature box is rotatably mounted at the x-direction mounting hole. A driving device is provided in the rolling frame, and a transmission mechanism is provided between the driving device and the high and low temperature box to drive the high and low temperature box to rotate around the axis of the x-direction mounting hole; the y-direction mounting hole is used to connect an external driving device to realize the rotation of the rolling frame and the high and low temperature box around the axis of the y-direction mounting hole, and the high and low temperature box is used to place the product to be tested.

2. A two-degree-of-freedom testing device with multiple factors coupling according to claim 1, characterized in that: The rolling frame is a symmetrical structure with a U-shaped symmetrical opening. The high and low temperature box part is located inside the U-shaped symmetrical opening, and the door of the high and low temperature box is located outside the U-shaped symmetrical opening; the x-direction mounting holes are symmetrically arranged on both sides of the U-shaped symmetrical opening and are located at the end of the U-shaped symmetrical opening.

3. A two-degree-of-freedom testing device with multiple factors coupling according to claim 2, characterized in that: The driving device is provided with two sets, which are symmetrically arranged on both sides of the U-shaped symmetrical opening.

4. A two-degree-of-freedom testing device with multiple-factor coupling according to claim 2 or 3, characterized in that: The transmission mechanism is a gear transmission mechanism, an x-direction short shaft is installed in the x-direction mounting hole, and a hydraulic slip ring is installed in the x-direction short shaft; the gear transmission mechanism includes a driving gear and a driven gear that mesh with each other, the driving gear is located in the U-shaped symmetrical opening, the driving device includes a motor connected to the driving gear, the fixed end of the hydraulic slip ring extends into the high and low temperature box and is sealed with the high and low temperature box, and the rotating end of the hydraulic slip ring is detachably connected to the x-direction short shaft; one side of the driven gear is detachably connected to the high and low temperature box, and the other side is detachably connected to the x-direction short shaft.

5. A two-degree-of-freedom testing device with multiple-factor coupling according to claim 4, characterized in that: The rolling frame has a U-shaped symmetrical inner cavity separated from the U-shaped symmetrical opening, and the U-shaped symmetrical inner cavity is provided with two layers of partitions arranged in parallel and spaced apart from each other to evenly divide the U-shaped symmetrical inner cavity into an upper cavity, a middle cavity and a lower cavity, and the partition is provided with a plurality of wire passing holes, the motor is fixed in the middle cavity, and the rolling frame is provided with a wire passing hole connected to the middle cavity.

6. A two-degree-of-freedom testing device with multiple-factor coupling according to claim 5, characterized in that: The rolling frame includes an outer plate, an inner plate and a cover plate, the outer plate and the inner plate are both U-shaped plates, the cover plate is connected to the top and bottom of the outer plate and the inner plate to form the U-shaped symmetrical inner cavity together with the outer plate and the inner plate; the partition plate is connected to the outer plate and the inner plate, the corners of the outer plate are chamfered, and the corners of the inner plate are provided with internal reinforcing ribs.

7. The multi-factor coupled two-degree-of-freedom testing device according to claim 6, characterized in that: A y-direction mounting sleeve is provided at the y-direction mounting hole, and the y-direction mounting sleeve is connected to each layer of partitions, outer plates and inner plates; a plurality of y-direction reinforcing rib plates are provided in the U-shaped symmetrical inner cavity in the circumferential direction around the y-direction mounting sleeve, and the plurality of y-direction reinforcing rib plates are respectively distributed in the upper cavity, the middle cavity and the lower cavity, and each y-direction reinforcing rib plate is provided with a through hole.

8. A two-degree-of-freedom testing device with multiple-factor coupling according to claim 6 or 7, characterized in that: An inspection opening is provided on the outer plate at a position corresponding to the motor, and an inspection cover is detachably connected to the inspection opening.

9. A two-degree-of-freedom testing device with multiple-factor coupling according to claim 6 or 7, characterized in that: The outer side plate and / or the inner side plate are provided with positioning steps for positioning and installing the cover plate.

10. A centrifuge, comprising a body and a testing device mounted on the body, characterized in that: The testing device is a two-degree-of-freedom testing device with multiple factors coupled as described in any one of claims 1 to 9.

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