Rack reliability test device and test method
By designing the bench reliability test device, using vibration test bench and dynamic model simulation, the reliability detection problem caused by relative motion of the diversion vane shield is solved, and efficient detection of its reliability is achieved and detection is improved. Accuracy and stability.
Patent Information
- Application Number
- CN202411279961.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-12
- Publication Date
- 2024-12-13
AI Technical Summary
The deflection vane air shield has relative motion installed between the engine and the radiator, making its reliability difficult to be effectively detected and evaluated, affecting the efficiency and performance of the turbine.
A bench reliability test device is designed, including a first fixed tool for installing a radiator air shield, a second fixed tool for installing a diversion vane air shield, and simulating vehicle vibration through a vibration test bench, combining power Learn model simulation to realize the detection of the reliability of the air shield of the diversion blade.
By simulating the vehicle assembly relationship, effective detection of the reliability of the diversion vane shield is achieved, the detection accuracy and stability are improved, the test process is simplified, and the cost is reduced.
Smart Images
Figure CN119124652A_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the technical field of vehicle reliability testing, and in particular to a bench reliability testing device and a testing method. Background Art
[0002] The guide vane wind shield for commercial vehicles is used in the cooling system of traditional fuel vehicles. Compared with traditional wind shields, it is located in the stationary part of the turbine and is usually installed on the annular casing to guide and adjust the airflow or steam flow entering the moving blades. The design and layout of the guide vane wind shield are crucial to the efficiency and performance of the turbine. It can ensure that the fluid hits the moving blades at the optimal angle and speed, improve the performance and efficiency of the conical ring fan, and thus improve the energy conversion efficiency.
[0003] Since the guide blade wind shield is installed between the engine and the radiator, there is relative movement between the engine and the radiator, so it is necessary to focus on the reliability of the guide blade wind shield, and it is urgent to develop a bench reliability test device and method for the guide blade wind shield. Summary of the invention
[0004] Based on this, it is necessary to provide a bench reliability test device and method to address the problem of the reliability of the guide vane wind shield, as there is relative movement between the engine and the radiator.
[0005] In the first aspect, the present application provides a bench reliability test device, which adopts the following technical solution:
[0006] A bench reliability test device is used to perform reliability tests on guide vane wind shields, the test device comprising a first fixing fixture and a second fixing fixture, the first fixing fixture comprising a base and a first mounting bracket mounted on the base, the first mounting bracket being used to mount a radiator wind shield; the second fixing fixture comprising a second mounting bracket and a vibration test bench mounted on the first mounting bracket, the second mounting bracket being used to mount a guide vane protective cover, the vibration test bench being used to simulate vibrations generated by a vehicle; wherein the second fixing fixture can move relative to the first fixing fixture and press the guide vane protective cover onto the radiator wind shield.
[0007] In one of the embodiments, a sliding channel is opened on the base, and the first mounting bracket includes a supporting portion and a connecting portion, the supporting portion is used to support the radiator protective wind cover, and the connecting portion is passed through the supporting portion and can be slidably installed in the sliding channel.
[0008] In one of the embodiments, the sliding channel includes a plurality of first sliding grooves and a plurality of second sliding grooves, and the first sliding grooves and the second sliding grooves are perpendicular to each other and connected.
[0009] In one of the embodiments, along the extension direction of the sliding channel, the cross section of the sliding channel is configured to be "T"-shaped, and the connecting portion can be slidably installed in the sliding channel and clamped to the base.
[0010] In one embodiment, the second mounting bracket includes a fixing seat, a connecting member and a mounting member, the connecting member is provided with a plurality of strip holes, the strip holes are distributed in an array, and the fixing seat and the mounting member can be installed to any of the strip holes of the connecting member by means of bolts.
[0011] In one of the embodiments, the vibration test bench comprises a plurality of fixing holes, which are distributed in an array, and the fixing seat can be connected to any of the fixing holes of the vibration test bench by means of bolts.
[0012] In one of the embodiments, the test device further comprises a rubber ring which can be pressed between the radiator wind shield and the guide blade wind shield.
[0013] In a second aspect, the present application provides a test method, which is applied to the bench reliability test device according to any one of claims 1 to 7, and the test method comprises the following steps:
[0014] S1: Collect road spectra to obtain the output torque of the powertrain, the three-dimensional acceleration of the four corners of the radiator assembly, and the three-dimensional acceleration of the four mounting points of the powertrain;
[0015] S2: Solve the six-axis acceleration and six-axis displacement of the radiator assembly;
[0016] S3: Establish the dynamic model of the powertrain and radiator assembly;
[0017] S4: Simulate and obtain the relative displacement of the joint surface of the guide blade and wind shield;
[0018] S5: convert the relative displacement of the guide vane wind shield joint surface into the center displacement of the vibration test bench;
[0019] S6: Input the center displacement into the vibration test bench for reliability test.
[0020] In one embodiment, solving the six-direction acceleration and six-direction displacement of the radiator assembly comprises the following steps:
[0021] S21: Solve the six-axis acceleration and six-axis displacement of the center point of the radiator assembly;
[0022] S22: Solve the six-dimensional acceleration and six-dimensional displacement of the center of mass of the powertrain.
[0023] In one embodiment, the simulation to obtain the relative displacement of the guide blade wind shield joint surface comprises the following steps:
[0024] S41: adding the six-direction displacement of the center point of the radiator obtained by S21 to the center point of the radiator assembly described in S3;
[0025] S42: adding the six-direction displacement of the center of mass of the power assembly solved in S22 to the center of mass of the power assembly described in S3;
[0026] S43: by using S41 and S41, solving the first relative displacement of the guide blade wind shield joint surface;
[0027] S44: adding the powertrain output torque collected in S1 to the output end of the powertrain described in S3;
[0028] S45: solving the second relative displacement of the guide blade wind shield joint surface through S44;
[0029] S46: Through S43 and S45, the first relative displacement and the second relative displacement are added to obtain the overall relative displacement of the guide blade wind shield joint surface.
[0030] The above-mentioned bench reliability test device first realizes the simulated installation of the radiator wind shield through the first fixed tool, and realizes the simulated installation of the guide vane protective cover through the second fixed tool, and then presses the guide vane protective cover onto the radiator wind shield through the mutual cooperation of the first fixed tool and the second fixed tool to simulate the assembly relationship between the guide vane wind shield, the engine and the radiator after the assembly of the whole vehicle, thereby realizing effective detection of the reliability of the guide vane wind shield. BRIEF DESCRIPTION OF THE DRAWINGS
[0031] Figure 1 It is a three-dimensional structural diagram of a bench reliability testing device in one embodiment of the present application.
[0032] Figure 2 It is an exploded diagram of a bench reliability test device in one embodiment of the present application.
[0033] Figure 3 Schematic diagram of the structure of the guide blade wind shield in one embodiment of the present application.
[0034] Figure 4 It is a three-dimensional structural diagram of the second fixing tool in one embodiment of the present application.
[0035] Figure 5 Schematic diagram of the output torque of the powertrain in one embodiment of the present application.
[0036] Figure 6Schematic diagram of three-phase acceleration of four corners of the radiator assembly in one embodiment of the present application.
[0037] Figure 7 It is a schematic diagram of the three-dimensional acceleration of the four suspension installation points of the powertrain in one embodiment of the present application.
[0038] Figure 8 Schematic diagram of the center displacement of a vibration test bench in one embodiment of the present application.
[0039] Notes on the attached drawings:
[0040] 1. First fixing tool; 11. Base; 111. Sliding channel; 1111. First sliding groove; 1112. Second sliding groove; 12. First mounting bracket; 121. Supporting part; 122. Connecting part; 2. Second fixing tool; 21. Vibration test bench; 211. Fixing hole; 22. Second mounting bracket; 221. Fixing seat; 222. Connecting piece; 2221. Strip hole; 223. Mounting piece; 3. Rubber ring; 4. Radiator wind shield; 5. Guide blade protective cover. DETAILED DESCRIPTION
[0041] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.
[0042] In the description of the present application, it should be understood that if the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, the orientation or position relationship indicated by these terms is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application.
[0043] In addition, if the terms "first" or "second" appear, these terms are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of this application, if the term "plurality" appears, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.
[0044] In this application, unless otherwise clearly specified and limited, if the terms "installed", "connected", "connected", "fixed" and the like appear, these terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances.
[0045] In the present application, unless otherwise clearly specified and limited, if there is a description that a first feature is "above" or "below" a second feature, etc., or similar descriptions appear, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "above" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.
[0046] It should be noted that if an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. If an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. If any, the terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in this application are for illustrative purposes only and do not represent the only implementation method.
[0047] Commercial vehicle SGV (Shroud Guide Vane) is used in the cooling system of traditional fuel vehicles. Compared with traditional shrouds, it can improve the performance and efficiency of conical ring fans. Since it is installed between the engine and the radiator, there is relative movement, so reliability issues need to be focused on. In order to meet the reliability requirements of components, it is necessary to develop a set of SGV bench reliability test equipment and methods.
[0048] See also Figure 1 An embodiment of the present application provides a bench reliability test device for performing a reliability test on a guide blade wind shield. The test device includes a first fixing fixture 1 for installing a radiator wind shield 4, and a second fixing fixture 2 for installing a guide blade protective cover 5. During the test, the guide blade protective cover 5 can be moved toward the first fixing fixture 1 driven by the second fixing fixture 2 until the guide blade protective cover 5 is pressed onto the radiator wind shield 4 to achieve simulated assembly between the guide blade protective cover 5 and the radiator wind shield 4, thereby achieving effective detection of the reliability of the guide blade wind shield.
[0049] Furthermore, in some embodiments, the test device also includes a rubber ring 3, and the above-mentioned guide blade guard 5 can be pressed onto the radiator wind shield 4 with the help of the rubber ring 3. On the one hand, it can realize a flexible pressing connection between the guide blade guard 5 and the radiator wind shield 4, and on the other hand, it can also fill the pressing gap between the guide blade guard 5 and the radiator wind shield 4 to improve the pressing stability.
[0050] Combination Figure 2 and Figure 3 As shown, in the embodiment of the present application, the first fixing fixture 1 includes a base 11 and a first mounting bracket 12 mounted on the base 11, the base 11 is used to provide structural support, and the radiator wind shield 4 is detachably mounted on the first mounting bracket 12 by means of bolts to fix the radiator wind shield 4. Specifically, the base 11 can be an iron floor with a certain weight to ensure the overall installation stability of the test device.
[0051] The second fixing tool 2 includes a second mounting bracket 22 and a vibration test bench 21 mounted on the second mounting bracket 22, wherein the second mounting bracket 22 is used to mount the above-mentioned guide vane shield 5, and the vibration test bench 21 is connected to the guide vane shield 5 by means of the second mounting bracket 22, so that the vehicle vibration simulated by the vibration test bench 21 is transmitted to the guide vane shield 5, thereby accurately simulating the relative movement between the engine and the radiator, and then simulating the operating condition of the guide vane shield to complete the reliability test of the guide vane shield.
[0052] Continue reading Figure 1 and Figure 2 As shown, in some embodiments, the first mounting bracket 12 specifically includes a supporting portion 121 for supporting the radiator protective wind cover, and a connecting portion 122 for detachably fixing the supporting portion 121 to the base 11. In the embodiment of the present application, the connecting portion 122 can specifically be a connecting bolt passing through the supporting portion 121.
[0053] Specifically, a sliding channel 111 is opened on the base 11, and the sliding channel 111 includes a plurality of first sliding grooves 1111 and a plurality of second sliding grooves 1112. In the embodiment of the present application, the first sliding grooves 1111 and the second sliding grooves 1112 can specifically be longitudinal grooves and transverse grooves opened on the surface of the base 11. The first sliding grooves 1111 and the second sliding grooves 1112 are perpendicular to each other and connected to form a criss-cross sliding channel 111. The bottom end of the above-mentioned connecting portion 122 can be slidably installed in the sliding channel 111, so that the operator can adjust the distance between the first fixing tool 1 and the second fixing tool 2 before the test.
[0054] Furthermore, in order to prevent the first mounting bracket 12 from disengaging from the sliding channel 111 during the spacing adjustment process, or even causing the first mounting bracket 12 to fall over, in some embodiments, when observed along the extension direction of the sliding channel 111, the cross-section of the sliding channel 111 is configured as an inverted "T" shape, and the bottom end of the above-mentioned connecting portion 122 is slidably installed in the sliding channel 111, and the top end passes through the first mounting bracket 12 and is threadedly connected with a locking nut to achieve fixation of the first mounting bracket 12 in the height direction, while not affecting the adjustment of the horizontal position of the first mounting bracket 12.
[0055] Combination Figure 1 and Figure 4 As shown, in some embodiments, the second mounting bracket 22 includes a fixing seat 221, a connecting member 222 and a mounting member 223, wherein the connecting member 222 and the mounting member 223 are both configured as a plate-like structure, the connecting member 222 is connected between the fixing seat 221 and the mounting member 223 by means of bolts, the vibration test bench 21 is connected to the fixing seat 221 by means of bolts, and the guide vane wind shield is fixed to the mounting member 223 by means of two tightenable bolts, so as to facilitate the adjustment of the installation position and installation spacing of the guide vane wind shield in the vertical direction.
[0056] Specifically, the connecting member 222 is provided with a plurality of strip holes 2221, and the plurality of strip holes 2221 are arranged in an array on the periphery of the connecting member 222. In the embodiment of the present application, a portion of the strip holes 2221 are arranged along the lateral intervals of the connecting member 222, so as to achieve adjustable installation spacing in the left and right directions, and the remaining strip holes 2221 are arranged along the longitudinal intervals of the connecting member 222, so as to achieve adjustable installation spacing in the vertical direction. During actual installation, the operator can freely select the corresponding strip holes 2221 for installation according to actual installation requirements, so as to achieve relative adjustment of the installation positions of the vibration test bench 21 and the guide blade wind shield.
[0057] Continue reading Figure 1 and Figure 2As shown, in some embodiments, the vibration test table 21 is densely covered with fixing holes 211, and all the fixing holes 211 are distributed in an array. During actual installation, the operator can fix the vibration test table 21 by means of bolts passing through the fixing holes 211 and the fixing seat 221 in sequence, thereby adjusting the installation position of the vibration test table 21. It is understandable that in order to ensure the adjustment accuracy, the spacing between adjacent fixing holes 211 on the vibration test table 21 in the embodiment of the present application should be as small as possible to improve the adjustment accuracy.
[0058] Combination Figures 1 to 8 As shown, in some embodiments, the present application further provides a test method, which uses a bench reliability test device as shown in any of the above embodiments to perform a reliability test on the guide blade wind shield, and the test method specifically includes the following steps:
[0059] Step S1: collecting road spectra to obtain the output torque of the powertrain, the three-dimensional accelerations of the four corners of the radiator assembly, and the three-dimensional accelerations of the four suspension installation points of the powertrain.
[0060] Step S2: Calculate the six-dimensional acceleration and six-dimensional displacement of the radiator assembly.
[0061] Step S3: Establishing a dynamic model of the powertrain and the radiator assembly.
[0062] Step S4: Simulate and obtain the relative displacement of the joint surface of the guide vane and the wind shield.
[0063] Step S5: converting the relative displacement of the guide vane wind shield joint surface into the center displacement of the vibration test bench 21 .
[0064] Step S6: input the center displacement to the vibration test bench 21 to perform a reliability test.
[0065] See Figures 5 to 7 As shown, in step S1, collecting the road spectrum specifically refers to collecting the powertrain output torque, the three-dimensional acceleration of the four corners of the radiator assembly, and the three-dimensional acceleration of the four suspension installation points of a tractor when it is driving on the automobile test reliability road surface, and the collected data is used as the baseline data for subsequent measurement and calculation.
[0066] In step S2, the following steps are specifically included:
[0067] Step S21: Solve the six-way acceleration and six-way displacement of the center point of the radiator assembly: use the three-way acceleration spectrum data of the four corners of the radiator assembly to solve the six-way acceleration of the center point of the radiator assembly; use the six-way acceleration of the center point of the radiator assembly to solve the six-way displacement of the center point of the radiator assembly.
[0068] Step S22: Solve the six-way acceleration and six-way displacement of the powertrain center of mass: use the three-way acceleration of all the suspension installation points of the powertrain to solve the six-way acceleration of the powertrain center of mass; use the six-way acceleration of the powertrain center of mass to solve the six-way displacement of the powertrain center of mass.
[0069] In step S3, a dynamic model of the powertrain and the radiator assembly is established in the dynamics software ADAMS.
[0070] In step S4, the following steps are specifically included:
[0071] S41: adding the six-direction displacement of the center point of the radiator obtained by S21 to the center point of the radiator assembly described in S3;
[0072] S42: adding the six-direction displacement of the center of mass of the power assembly solved in S22 to the center of mass of the power assembly described in S3;
[0073] S43: by using S41 and S41, solving the first relative displacement of the guide blade wind shield joint surface;
[0074] S44: adding the powertrain output torque collected in S1 to the output end of the powertrain described in S3;
[0075] S45: solving the second relative displacement of the guide blade wind shield joint surface through S44;
[0076] S46: Through S43 and S45, the first relative displacement and the second relative displacement are added to obtain the overall relative displacement of the guide blade wind shield joint surface.
[0077] This test method obtains the displacement data (relative displacement data) required for the guide vane wind shield bench test by solving the relative displacement between the powertrain and the radiator assembly. At the same time, the relative displacement data takes into account the dynamic displacement caused by vibration and the quasi-static displacement caused by torque. Therefore, the overall test accuracy is high, so that the reliability of the bench can replace the vehicle reliability test, which helps to simplify the test process and reduce the test cost.
[0078] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.
[0079] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be construed as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent application shall be subject to the attached claims.
Claims
1. A bench reliability test device, used for reliability test of guide vane wind shield, characterized in that: The test device comprises: A first fixing tool comprises a base and a first mounting bracket mounted on the base, wherein the first mounting bracket is used for mounting a radiator wind shield; and A second fixed tool, comprising a second mounting bracket and a vibration test bench mounted on the first mounting bracket, wherein the second mounting bracket is used to mount the guide vane protective cover, and the vibration test bench is used to simulate vibrations generated by a vehicle; The second fixing fixture is movable relative to the first fixing fixture, and presses the guide blade protective cover onto the radiator wind shield.
2. The bench reliability test device according to claim 1, characterized in that: The base is provided with a sliding channel, and the first mounting bracket includes a supporting portion and a connecting portion, the supporting portion is used to support the radiator protective wind shield, and the connecting portion is penetrated by the supporting portion and can be slidably mounted on the sliding channel.
3. The bench reliability test device according to claim 2, characterized in that: The sliding channel includes a plurality of first sliding grooves and a plurality of second sliding grooves, and the first sliding grooves and the second sliding grooves are perpendicular to each other and communicated with each other.
4. The bench reliability test device according to claim 2, characterized in that: Along the extension direction of the sliding channel, the cross section of the sliding channel is configured to be "T"-shaped, and the connecting portion can be slidably installed in the sliding channel and clamped on the base.
5. The bench reliability test device according to claim 1, characterized in that: The second mounting bracket includes a fixing seat, a connecting member and a mounting member. The connecting member is provided with a plurality of strip holes distributed in an array. The fixing seat and the mounting member can be mounted to any of the strip holes of the connecting member by means of bolts.
6. The bench reliability test device according to claim 5, characterized in that: The vibration test bench comprises a plurality of fixing holes which are distributed in an array, and the fixing seat can be connected to any of the fixing holes of the vibration test bench by means of bolts.
7. The bench reliability test device according to claim 1, characterized in that: The test device also includes a rubber ring that can be pressed between the radiator wind shield and the guide blade wind shield.
8. A test method, applied to the bench reliability test device according to any one of claims 1 to 7, characterized in that: The test method includes: S1: Collect road spectra to obtain the output torque of the powertrain, the three-dimensional acceleration of the four corners of the radiator assembly, and the three-dimensional acceleration of the four mounting points of the powertrain; S2: Solve the six-axis acceleration and six-axis displacement of the radiator assembly; S3: Establish the dynamic model of the powertrain and radiator assembly; S4: Simulate and obtain the relative displacement of the joint surface of the guide blade and wind shield; S5: convert the relative displacement of the guide vane wind shield joint surface into the center displacement of the vibration test bench; S6: Input the center displacement into the vibration test bench for reliability test.
9. The test method according to claim 8, characterized in that The method for solving the six-direction acceleration and six-direction displacement of the radiator assembly comprises the following steps: S21: Solve the six-direction acceleration and six-direction displacement of the center point of the radiator assembly; S22: Solve the six-dimensional acceleration and six-dimensional displacement of the center of mass of the powertrain.
10. The test method according to claim 8, characterized in that The simulation to obtain the relative displacement of the guide blade wind shield joint surface comprises the following steps: S41: adding the six-direction displacement of the center point of the radiator obtained by S21 to the center point of the radiator assembly described in S3; S42: adding the six-direction displacement of the center of mass of the power assembly solved in S22 to the center of mass of the power assembly described in S3; S43: by using S41 and S41, solving the first relative displacement of the guide blade wind shield joint surface; S44: adding the powertrain output torque collected in S1 to the output end of the powertrain described in S3; S45: solving the second relative displacement of the guide blade wind shield joint surface through S44; S46: Through S43 and S45, the first relative displacement and the second relative displacement are added to obtain the overall relative displacement of the guide blade wind shield joint surface.