CN116678580A - Friction pair vibration noise test experimental device with data acquisition function - Google Patents
Friction pair vibration noise test experimental device with data acquisition function Download PDFInfo
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- CN116678580A CN116678580A CN202310662687.4A CN202310662687A CN116678580A CN 116678580 A CN116678580 A CN 116678580A CN 202310662687 A CN202310662687 A CN 202310662687A CN 116678580 A CN116678580 A CN 116678580A
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- 238000012360 testing method Methods 0.000 title claims abstract description 30
- 230000005540 biological transmission Effects 0.000 claims abstract description 13
- 239000002184 metal Substances 0.000 claims description 13
- 238000000034 method Methods 0.000 claims description 4
- 230000008569 process Effects 0.000 claims description 3
- 238000002474 experimental method Methods 0.000 abstract description 24
- 239000011521 glass Substances 0.000 abstract description 14
- 230000033001 locomotion Effects 0.000 abstract description 10
- 210000001503 joint Anatomy 0.000 abstract 1
- 230000001133 acceleration Effects 0.000 description 7
- 239000005357 flat glass Substances 0.000 description 3
- 230000007246 mechanism Effects 0.000 description 3
- 206010039740 Screaming Diseases 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
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- 244000145845 chattering Species 0.000 description 1
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- 230000004048 modification Effects 0.000 description 1
- 238000007790 scraping Methods 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 230000001052 transient effect Effects 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M7/00—Vibration-testing of structures; Shock-testing of structures
- G01M7/02—Vibration-testing by means of a shake table
- G01M7/025—Measuring arrangements
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
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Abstract
The application discloses a friction pair vibration noise test experimental device with a data acquisition function, which comprises: a drive assembly, a friction pair assembly and a windshield; one end of the friction pair assembly is in transmission connection with the driving assembly, the other end of the friction pair assembly is connected with a wiper strip, the wiper strip is in butt joint with the windshield glass, the driving assembly and the windshield glass are fixed on the experiment table, and the driving assembly can drive the friction pair assembly to move in the up-down direction and rotate along the horizontal plane; the friction pair assembly moves up and down and rotates through the driving assembly, the motion characteristics of the reciprocating motion of the friction pair can be well reduced, the pressure between the friction pairs and the rotation speed of the friction pair assembly can be controlled, and good experimental conditions are provided for the vibration noise experiment of the friction pair.
Description
Technical Field
The application relates to the field of friction noise testing, in particular to an experimental device for testing friction pair vibration noise with a data acquisition function.
Background
The system of two objects that are both in direct contact and produce relative frictional motion is called a friction pair. Friction pairs are almost available in various fields of social activities, such as robot joints, motor drive systems, marine water lubricated bearings, rail transport systems, tools and workpieces for cutting lathes, braking systems, etc., and friction vibrations and friction noise occurring on the friction pairs of these systems affect the normal use of the systems, wherein the problem of friction noise control is not yet well solved.
Taking a typical windscreen wiper wind window friction pair as an example, the windscreen wiper wind window is an important component of a vehicle, the wind window glass is positioned at the front part of the vehicle, and the windscreen wiper is used for removing rain, snow, dust, soil and other dirt on the wind window glass, so that the outer surface of the wind window glass can be kept clean, and the sight of a driver is clear. The wiper and the windshield constitute a pair of typical sliding friction pairs. Vibration, transient broadband noise and screaming, chattering and reversing noise generated by friction have great influence on passengers in a vehicle, and have been paid attention and studied for a long time.
The experiment is a basic method for researching the vibration noise of the friction pair such as a windscreen wiper window, and is helpful for clearly knowing the appearance characteristics of the noise. Taking a windscreen wiper wind window experiment as an example, the traditional windscreen wiper wind window noise experiment can be divided into a real vehicle experiment and a bench experiment. Because the gap between the wiper brush and the wiper arm in the wiper wind window friction pair real vehicle is smaller and fixed, the measuring instruments such as a force sensor and the like are difficult to add. Meanwhile, because the automobile windscreen wiper wind window system is complex, motor noise and other uncontrollable factors are more, and screaming, flutter and reverse noise in the wiping process are difficult to focus, bench experiments are mostly adopted in friction pair-like noise experiments.
Most of the existing friction pair experiment tables still stay in the stage designed for the endurance test, lack of control mechanisms for key parameters such as pressure, speed and the like, and detection mechanisms for parameters such as friction force, normal force and the like, and cannot perform a windscreen wiper wind window friction pair vibration noise experiment. In view of this, how to provide a test device for testing the vibration noise of the friction pair of the windscreen wiper wind window, which can control key data and accurately collect friction force and normal force, is a technical problem which needs to be solved by the person in the art.
Disclosure of Invention
The application aims to provide an experimental device for testing friction pair vibration noise of a windscreen wiper window and the like, so as to solve the problems in the prior art and simulate the friction vibration noise of a windscreen wiper strip and the windscreen under different parameter conditions.
In order to achieve the above object, the present application provides the following solutions: the application provides a friction pair vibration noise test experimental device with a data acquisition function, taking a windscreen wiper wind window friction pair as an example, the experimental device comprises: a drive assembly, a friction pair assembly and a windshield; the friction pair assembly one end with drive assembly transmission is connected, and the other end fixedly connected with wiper strip, wiper strip with windshield butt, drive assembly with windshield is fixed on the laboratory bench, drive assembly can drive friction pair assembly is along the upper and lower direction removal and along the horizontal plane rotation.
The beneficial effects of the application are as follows:
1. the driving assembly is used for realizing up-and-down movement and rotation of the friction pair assembly and the wiper strip, the movement characteristics of the reciprocating movement of the real vehicle wiper can be well restored, the pressure of the wiper strip on the windshield glass and the rotation speed of the wiper strip can be controlled, and good experimental conditions are provided for the friction pair vibration noise experiment of the wiper.
2. Under the experimental condition of the friction pair vibration noise of the windscreen wiper, different working environments such as high temperature, rainy days, low temperature and the like can be formed by combining other equipment, so that the vibration noise of the friction pair of the windscreen wiper can be tested under various working conditions, and an experimental foundation is provided for the experiment of the vibration noise of the friction pair of the windscreen wiper under different testing conditions.
3. Meanwhile, the application can be used for refitting the existing related experiment bench to achieve the purpose of testing the friction vibration noise of the windscreen wiper, and can achieve the purpose of testing the vibration noise of the windscreen wiper for different vehicles by changing the installation position of the windscreen wiper, so that the building cost of different experiment benches is reduced.
Further, the driving assembly comprises a driving motor, a supporting piece and a rotating motor, wherein a sliding rail is arranged on the supporting piece in the longitudinal direction, a sliding block is connected in the sliding rail in a sliding manner, the driving motor is arranged above the supporting piece, a lead screw is arranged in the supporting piece, one end of the lead screw is in transmission connection with the driving motor, the other end of the lead screw is in transmission connection with the sliding block, and the driving motor can drive the sliding block to move up and down along the sliding rail through the lead screw; the rotary motor is fixedly arranged on the sliding block, the output end of the rotary motor is fixedly connected with one end of the friction pair assembly, and the rotary motor can drive the friction pair assembly to rotate along a horizontal plane. The friction pair assembly and the wiper strip are controlled to move up and down through the driving motor, so that the pressure of the wiper strip on the windshield glass is controlled, the speed of the reciprocating motion of the wiper strip on the windshield glass is controlled through the rotating speed of the rotating motor, and the pressure and the speed are controlled.
Further, the device further comprises a three-way force sensor, wherein the three-way force sensor is arranged on the friction pair assembly and can collect pressure of the windscreen wiper strip to the vertical direction of windscreen wiper, and friction force and normal force generated in the rotation process of the windscreen wiper strip.
The three-way force sensor has the following functions: 1. the pressure applied to the windshield glass can be detected, and the pressure of the windshield glass by the wiper strip can be accurately controlled by combining the driving assembly; 2. the friction force and the normal force can be detected, the friction coefficient between the wiper strip and the windshield glass can be obtained through calculation, and the vibration noise experiment of the friction pair of the wiper windshield under the conditions of different friction coefficients can be realized by combining other environmental conditions capable of changing the friction coefficient. The calculation formula of the friction coefficient is as follows: μ=f/N, where μ -coefficient of friction, f-friction, N-normal pressure.
Further, the friction pair assembly includes: the wiper comprises a wiper arm and an arched elastic metal groove sheet, wherein one end of the wiper arm is in transmission connection with the driving assembly, the other end of the wiper arm is fixedly connected with the top end of the three-way force sensor, the upper end of the arched elastic metal groove sheet is connected with the bottom end of the three-way force sensor, and the wiper strip is embedded at the lower end of the arched elastic metal groove sheet. The arcuate resilient metal channel sheet is capable of imparting a uniformly distributed downforce to the wiper strip under the condition that the drive mechanism imparts the downforce.
Further, the lower end of the arched elastic metal groove piece is provided with a C-shaped groove, and the wiper strip is embedded in the C-shaped groove, so that different types of wiper strips can be replaced according to experimental requirements.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings that are needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of the overall structure of the present application;
FIG. 2 is a schematic view of a connection structure of a C-shaped groove and a wiper strip;
FIG. 3 is a graph of vibration acceleration under high speed conditions in example 1;
FIG. 4 is a graph of vibration acceleration under low speed conditions in example 1;
FIG. 5 is a graph showing the friction coefficient at various pressures in example 2;
FIG. 6 is a time domain noise plot for the wet high speed operating condition of example 3;
FIG. 7 is a time domain noise plot for the dry high speed condition of example 3;
10, a driving assembly; 101. a driving motor; 102. a support; 103. a slide block; 20. a rotating electric machine; 30. a friction pair assembly; 31. a scraping arm; 32. a three-way force sensor; 33. arcuate resilient metal channel strips; 40. a windshield.
Detailed Description
The following description of the embodiments of the present application will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
In order that the above-recited objects, features and advantages of the present application will become more readily apparent, a more particular description of the application will be rendered by reference to the appended drawings and appended detailed description.
As shown in fig. 1-2, the present application provides an experimental apparatus for testing friction vibration noise of a wiper blade, comprising: a drive assembly 10, a friction pair assembly 30 and a windshield 40; one end of the friction pair assembly 30 is in transmission connection with the driving assembly 10, the other end of the friction pair assembly 30 is fixedly connected with a wiper strip, the wiper strip is abutted to the windshield glass 40, the driving assembly 10 and the windshield glass 40 are fixed on the experiment table, and the driving assembly 10 can drive the friction pair assembly 30 to move along the up-down direction and rotate along the horizontal plane.
In this embodiment, the driving assembly 10 includes a driving motor 101, a supporting member 102 and a rotating motor 20, the supporting member 102 is provided with a sliding rail along a longitudinal direction, a sliding block 103 is slidably connected in the sliding rail, the driving motor 101 is disposed above the supporting member 102, a screw is disposed inside the supporting member 102, one end of the screw is in transmission connection with the driving motor 101, the other end of the screw is in transmission connection with the sliding block 103, and the driving motor 101 can drive the sliding block 103 to move up and down along the sliding rail through the screw; the rotating motor 20 is fixedly arranged on the sliding block 103, the output end of the rotating motor 20 is fixedly connected with one end of the friction pair assembly 30, and the rotating motor 20 can drive the friction pair assembly 30 to rotate along the horizontal plane. The friction pair assembly 30 and the wiper strip are controlled to move up and down through the driving motor 101, so that the pressure of the wiper strip on the windshield glass 40 is controlled, the speed of the wiper strip reciprocating on the windshield glass 40 is controlled through the rotating speed of the rotating motor 20, and the pressure and the speed are controlled.
In this embodiment, the three-way force sensor 32 is further included, and the three-way force sensor 32 is disposed on the friction pair assembly 30, which can collect the pressure of the wiper strip to the vertical direction of the windshield 40, and the friction force and the normal force generated during the rotation of the wiper strip.
In the present embodiment, the friction pair assembly 30 includes: the wiper arm 31 and the arc-shaped elastic metal groove piece 33, one end of the wiper arm 31 is in transmission connection with the driving assembly 10, the other end of the wiper arm is in fixed connection with the top end of the three-way force sensor 32, the upper end of the arc-shaped elastic metal groove piece 33 is connected with the bottom end of the three-way force sensor 32, the lower end of the arc-shaped elastic metal groove piece 33 is provided with a C-shaped groove, and the wiper strip is embedded in the C-shaped groove.
Example 1-test of vibration noise of Friction pair of windshields of different speeds or accelerations
The driving motor 101 is started, the friction pair assembly 30 and the windscreen wiper strip are driven by the sliding block 103 to press down the windscreen 40, the pressure value is detected by the three-way force sensor 32, the driving motor 101 is stopped after the preset pressure value is reached, the rotating motor 20 is started under the condition, and the vibration noise data of the windscreen wiper friction pair under different speeds or accelerations are measured, and the test results are shown in fig. 3 and 4.
In this embodiment, the acceleration may be collected by an accelerometer disposed below the windshield 40, the noise is collected by a microphone disposed at a position where the wiper strip rotates in the opposite direction, and the signal is collected by the LMSSCM05 and transmitted into a computer, and a noise image is formed.
As shown in fig. 3 and 4, fig. 3 is a vibration acceleration image generated by high-speed reciprocation of the wiper strip under the drying condition of the windshield 40, and fig. 4 is a vibration acceleration image generated by low-speed reciprocation of the wiper strip under the drying condition of the windshield 40, it can be seen that the vibration generated by high-speed reciprocation is greater than the vibration generated by low-speed reciprocation, and the experimental device for testing the friction vibration noise of the windshield wiper disclosed in the embodiment is truly effective in accordance with the actual situation.
Example 2-test of vibration noise of Friction pair of windshield wiper with different downforce
Starting a driving motor 101, driving a friction pair assembly 30 and a wiper strip to press down a windshield glass 40 through a sliding block 103, and detecting a pressure value through a three-way force sensor 32; the rotary motor 20 is activated to reciprocate the friction pair assembly 30 and wiper strip on the windshield 40 at a uniform speed. By changing the downward force of the wiper strip on the windshield 40 through the driving motor 101, real-time data of the directional force of the wiper wind window friction pair under different downward forces are measured, friction coefficient data are obtained through calculation, and the test result is shown in fig. 5.
As shown in fig. 5, under the working conditions of 3N,4N,5N (values according to the actual automobile windshield wiper pressure range), the windshield wiper friction pair vibration noise test (in fig. 5, the initial state is that the friction coefficient curves corresponding to 4N, the friction coefficient curves corresponding to 5N and the friction coefficient curves corresponding to 3N are sequentially from top to bottom) is sequentially performed, so that the peak values and the trend of the friction coefficient curves under different pressures are obviously different, and the peak values and the trend are consistent with the actual conditions, and prove that the experimental device for testing the windshield wiper friction vibration noise disclosed in the embodiment is truly effective.
Example 3-experiment of the Friction pair vibration noise of the windshield of different coefficients of Friction
The pre-experiment preparation step of this embodiment is basically the same as that of embodiment 1, except that the rotary electric machine 20 is operated at a constant speed, keeping the speed of the wiper strip unchanged. The vibration noise data of the wiper blade friction pair under different friction coefficients were measured by spraying water to the surface of the windshield 40 to change the surface dryness and thus the friction coefficient (the friction coefficient between the wiper blade and the glass is about 0.95 under the dry condition, about 1.25 under the semi-wet condition, and about 0.25 under the wet condition, as summarized by experimental experience), and the test results are shown in fig. 6 and 7.
As shown in fig. 6 and 7, fig. 6 is a time domain image of noise generated by high-speed reciprocation of the wiper strip under the dry condition of the windshield 40, and fig. 7 is a time domain image of noise generated by high-speed reciprocation of the wiper strip under the wet condition of the windshield 40, it can be seen that the noise generated by the dry high-speed working condition is greater than the noise generated by the wet high-speed working condition, and the experimental device for testing the friction vibration noise of the windshield disclosed in the embodiment is truly effective according to the practical situation.
Example 4-experiment of vibration noise of Friction pair of windshields at different temperatures
The pre-experiment preparation step of this embodiment is basically the same as that of embodiment 1, except that the rotary electric machine 20 is operated at a constant speed, keeping the speed of the wiper strip unchanged. The vibration noise of the friction pair of the windscreen wiper is tested by changing the experimental environment temperature, the environment temperature is adjustable between 16 ℃ and 30 ℃, and after the indoor temperature is changed, the temperature of the surface of the windscreen 40 measured by the temperature measuring gun reaches a preset value, and then the experiment is carried out.
The application provides an experimental device for testing friction vibration noise of a windscreen wiper, which realizes up-and-down movement and rotation of a friction pair assembly 30 and a windscreen wiper strip through a driving assembly 10, can well restore the motion characteristics of reciprocating motion of a real vehicle windscreen wiper, can control the pressure of the windscreen wiper strip to a windscreen 40 and the rotation speed of the windscreen wiper strip, and provides good experimental conditions for the friction pair vibration noise experiment of the windscreen wiper. Under the experimental condition of the friction pair vibration noise of the windscreen wiper, different working environments such as high temperature, rainy days, low temperature and the like can be formed by combining other equipment, so that the vibration noise of the friction pair of the windscreen wiper can be tested under various working conditions, and an experimental foundation is provided for the experiment of the vibration noise of the friction pair of the windscreen wiper under different testing conditions.
In the description of the present application, it should be understood that the terms "longitudinal," "transverse," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate or are based on the orientation or positional relationship shown in the drawings, merely to facilitate description of the present application, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present application.
The above embodiments are only illustrative of the preferred embodiments of the present application and are not intended to limit the scope of the present application, and various modifications and improvements made by those skilled in the art to the technical solutions of the present application should fall within the protection scope defined by the claims of the present application without departing from the design spirit of the present application.
Claims (5)
1. An experimental apparatus for be used for testing windscreen wiper window friction vibration noise, characterized in that includes: a drive assembly (10), a friction pair assembly (30) and a windshield (40); the friction pair assembly (30) one end with drive assembly (10) transmission is connected, and the other end fixedly connected with wiper strip, wiper strip with windscreen (40) butt, drive assembly (10) with windscreen (40) are fixed on the laboratory bench, drive assembly (10) can drive friction pair assembly (30) are along the upper and lower direction removal and along the horizontal plane rotation.
2. The experimental device for testing friction vibration noise of a windscreen wiper window according to claim 1, wherein the driving assembly (10) comprises a driving motor (101), a supporting piece (102) and a rotating motor (20), the supporting piece (102) is provided with a sliding rail along the longitudinal direction, a sliding block (103) is connected in a sliding manner in the sliding rail, the driving motor (101) is arranged above the supporting piece (102), a lead screw is arranged inside the supporting piece (102), one end of the lead screw is in transmission connection with the driving motor (101), the other end of the lead screw is in transmission connection with the sliding block (103), and the driving motor (101) can drive the sliding block (103) to move up and down along the sliding rail through the lead screw; the rotary motor (20) is fixedly arranged on the sliding block (103), the output end of the rotary motor (20) is fixedly connected with one end of the friction pair assembly (30), and the rotary motor (20) can drive the friction pair assembly (30) to rotate along a horizontal plane.
3. The experimental device for testing friction vibration noise of a windscreen wiper according to claim 1, further comprising a three-way force sensor (32), wherein the three-way force sensor (32) is arranged on the friction pair assembly (30) and can collect pressure of the windscreen wiper strip to the vertical direction of a windscreen wiper (40), and friction force and normal force generated in the rotation process of the windscreen wiper strip.
4. An experimental device for testing the friction vibration noise of a windscreen wiper window according to claim 3, wherein said friction pair assembly (30) comprises: scrape arm (31) and bow-shaped elastic metal trough (33), scrape arm (31) one end with drive assembly (10) transmission is connected, the other end with the top fixed connection of three-way force sensor (32), bow-shaped elastic metal trough (33) upper end with the bottom of three-way force sensor (32) is connected, the windscreen wiper strip inlays and locates the lower extreme of bow-shaped elastic metal trough (33).
5. The experimental device for testing friction vibration noise of a windscreen wiper blade according to claim 4, wherein the lower end of the arcuate elastic metal groove piece (33) is provided with a C-shaped groove, and the windscreen wiper strip is embedded in the C-shaped groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310662687.4A CN116678580A (en) | 2023-06-06 | 2023-06-06 | Friction pair vibration noise test experimental device with data acquisition function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310662687.4A CN116678580A (en) | 2023-06-06 | 2023-06-06 | Friction pair vibration noise test experimental device with data acquisition function |
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| CN116678580A true CN116678580A (en) | 2023-09-01 |
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| CN202310662687.4A Pending CN116678580A (en) | 2023-06-06 | 2023-06-06 | Friction pair vibration noise test experimental device with data acquisition function |
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| CN (1) | CN116678580A (en) |
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