CN107588916B - Fuel tank noise measurement drive test bed - Google Patents
Fuel tank noise measurement drive test bed Download PDFInfo
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- CN107588916B CN107588916B CN201710689903.9A CN201710689903A CN107588916B CN 107588916 B CN107588916 B CN 107588916B CN 201710689903 A CN201710689903 A CN 201710689903A CN 107588916 B CN107588916 B CN 107588916B
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- fuel tank
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- sliding table
- lead screw
- servo motor
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Abstract
The invention relates to a fuel tank noise measurement driving test bed. The base is provided with a track, the base is connected with a motor support and a lead screw support, the motor support is connected with a servo motor, the servo motor comprises a brake device, the lead screw support is connected with a lead screw, the lead screw is connected with a sliding table, a sliding block on the sliding table is in contact connection with the track, the sliding table is connected with a microphone support, the microphone support is connected with an acoustic sensor, two ends of the base are provided with limit switches, and the limit switches are connected with the brake device on the servo motor. The invention overcomes the defect that the prior device can not provide quantized braking acceleration. Due to the use of the closed-loop servo driving system, accurate acceleration/deceleration can be provided for the sliding table, the shaking noise of the oil liquid of the fuel tank is recorded, the fuel tank is horizontally placed when the test bed tests the noise, the common road working condition is better met, the motor can be reversely rotated after the test is finished, the sliding table is driven to return to the initial position, the test time is saved, and the working strength of a tester is reduced.
Description
Technical Field
The invention relates to a noise measuring device, in particular to a fuel tank noise measurement driving test bed.
Background
Before the invention, the invention discloses a simulation brake test bed for testing the noise of a fuel tank, which is disclosed by 'Chinese invention patent with application number of 201310399146.3', and the simulation brake test bed can measure the shaking noise of an inclined fuel tank after the fuel tank stops braking. However, the main factor affecting the sloshing noise of the fuel tank is the braking acceleration; the project cannot provide quantized braking acceleration, so that the shaking noise of the oil liquid of the horizontal fuel tank under different braking working conditions cannot be truly represented.
Disclosure of Invention
The invention aims to overcome the defects and develop a fuel tank noise measurement driving test bed.
The technical scheme of the invention is as follows:
fuel tank noise measurement drive test bench, including the base, its main technical characteristics sets up the track on the base, and the base is connected motor support, screw bracket respectively, and motor support connects servo motor, and servo motor contains arresting gear, screw bracket connection lead screw, screw connection slip table, slider and track contact connection on the slip table, and the microphone support is connected to the slip table, and microphone leg joint sound sensor, limit switch is installed at the base both ends, and limit switch connects servo motor's arresting gear.
The motor support and the lead screw support are coaxial.
And the end surface of the sliding table is connected with a speed sensor and an acceleration sensor.
The ball screw is hollow.
And the coupling between the servo motor and the ball screw is a flexible coupling.
The acoustic sensor is coupled to the windshield.
The invention has the advantages and effects that due to the use of the closed-loop servo driving system, accurate acceleration/deceleration can be provided for the sliding table, and the shaking noise of oil liquid in the fuel tank can be recorded, but the prior art cannot accurately represent the braking deceleration. The fuel tank is horizontally arranged when the test bed tests noise, which is more in line with the working condition of a common road, and the noise measured by the prior art is the shaking noise when the fuel tank inclines. After the test is finished, the test bed can reversely rotate the motor to drive the sliding table to return to the initial position, and in the prior art, the trolley needs to be manually pushed to the high position, so that the test bed is labor-consuming and time-consuming; therefore, the test bench saves the test time and reduces the working strength of testers.
Drawings
FIG. 1 is a front view of a fuel tank noise measurement drive test stand of the present invention.
FIG. 2 is a partially enlarged schematic view of FIG. 1.
FIG. 3 is a schematic view of the axis of the slip of the present invention.
In the drawings, each reference numeral indicates a corresponding component name as follows:
the device comprises a base 1, a motor support 1-1, a screw rod support 1-2, a servo motor 2, a brake device 2-1, a coupler 3, a screw rod 4, a guide rail 5, a track 5-1, a sliding block 5-2, a sliding table 6, a limit switch 7, a speedometer 8, an accelerometer 9, a microphone support 10 and an acoustic sensor 11.
Detailed Description
The technical idea of the invention is as follows:
by setting the rotating speed of the servo motor and matching the lead of the ball screw, various braking deceleration working conditions can be accurately simulated; and the oil shaking noise under the quantitative braking working condition is measured, and the horizontal placement of the fuel tank during measurement is ensured.
As shown in fig. 1-3:
the invention comprises a base 1, wherein a motor bracket 1-1 capable of mounting a servo motor 2 and a screw bracket 1-2 capable of mounting a ball screw 4 are arranged above the base 1, and the motor bracket 1-1 is coaxial. The servo motor 2 is arranged on the motor support 1-1, and the servo motor 2 comprises a braking device 2-1; the lead screw support 1-2 is provided with a (ball) lead screw 4, and the lead screw support and the lead screw are directly connected by a (flexible) coupler 3 so as to reduce the background noise when the system rotates. The lead screw 4 and the sliding table 6 move in a matched mode, and the fuel tank is fixed above the sliding table. In order to reduce the deformation of the screw rod 4, the sliding blocks 5-2 are arranged on two sides of the sliding table 6, and the sliding blocks 5-2 are matched with the rails 5-1 on the base to play a role in supporting the sliding table 6. And a speed sensor 8 and an acceleration sensor 9 are arranged on the end surface of the sliding table 6 and form a closed-loop control system with the servo electric mechanism 2, so that the sliding table 6 can accurately move according to a set braking working condition. A microphone bracket 10 is installed on the side surface of the sliding table 6, and an acoustic sensor 11 is installed on the microphone bracket 10; and the two ends of the base 1 are provided with limit switches 7, and after the sliding table 6 triggers the limit switches 7, the servo motor 2 can be emergently braked by the braking device 2-1 and locks the main shaft of the servo motor 2, so that the sliding table 6 is prevented from colliding with the base 1.
The application process of the invention is briefly described as follows:
during testing, the servo motor 2 drives the sliding table 6 to move forwards at set acceleration and acceleration time, and when the set conditions are reached, the servo motor 2 stops running. Working condition 1: the sliding table 6 continues to slide on the track 5-1 by means of inertia, and at the moment, shaking noise of the oil tank is simulated when the vehicle brakes but does not completely stop. After the sliding table 6 continuously runs to the trigger limit switch 7, the test is finished; the brake device 2-1 works and locks the rotor, and the sliding table 6 stops. Working condition 2: the brake device 2-1 directly locks the motor rotor, the acoustic sensor 11 works and records the oil shaking noise; the sloshing noise of the oil tank when the vehicle brakes and stops completely is simulated.
After the test is finished, adjusting the servo motor 2 to rotate reversely, and enabling the sliding table 6 to return to the initial position; at this time, the parameters of the servo motor 2 can be adjusted to continue the test.
The above description is only for the preferred embodiment of the present invention, and not intended to limit the scope of the present invention. In addition to the above embodiments, the present invention may have other embodiments. All the technical solutions adopting the equivalent substitution or the equivalent transformation fall within the protection scope of the claims of the present invention. Technical features of the present invention which are not described may be implemented by or using the prior art, and will not be described herein.
As a preferable scheme of the invention, the test bed can test the dynamic noise of the oil tank after braking. E.g. initial velocity V1After a braking time t at a certain braking deceleration a, the speed becomes V2(V2Not equal to 0); at this time, the sliding table 6 can be made to translate by means of inertia, and the acoustic sensor 11 is used for recording relevant shaking noise. This condition often occurs when the vehicle is traveling at low speeds, and the prior art fails to simulate this braking condition.
As a preferable scheme of the invention, the test bed is arranged in the silencing chamber, and the control system is arranged outside the silencing chamber. The test personnel observe the test process through a monitoring system installed inside the anechoic chamber. Except for changing the height of oil, all tests do not need testers to enter the anechoic chamber for operation. On one hand, the testing error caused by human factors can be reduced, and on the other hand, the working strength of testing personnel can be reduced.
In a preferred embodiment of the present invention, the coupling 3 between the driving servomotor 2 and the ball screw 4 is a flexible coupling, and serves to absorb vibration and reduce system operation noise.
As a preferable aspect of the present invention, the ball screw 4 is preferably a large lead; the same motor speed can provide larger acceleration; under the same braking acceleration working condition, the rotating speed of the servo motor 2 is lower, so that the background noise is smaller.
As a preferable aspect of the present invention, the ball screw 4 may take a hollow form; the hollow ball screw 4 can reduce the inertia of the whole system and improve the dynamic response characteristic of the system.
In a preferred embodiment of the present invention, the braking/driving acceleration generated by the driving servomotor 2 and the ball screw 4 is less than 1 g (g is gravitational acceleration), and 0 < a < g. This is because the vehicle itself has a braking acceleration of less than 1 g and therefore the test stand does not need to produce a greater braking acceleration.
As a preferable scheme of the invention, the lead screw 4 and the guide rail sliding block 5-2 can adopt wear-resistant damping alloy or engineering plastics, such as copper alloy and modified PEEK. The application of the high-damping material can obviously reduce the vibration and running noise of the test bed and improve the measurement precision of the oil liquid shaking noise.
As a preferable scheme of the invention, the servo motor 2 must contain a braking device 2-1; when the sliding table 6 triggers the limit switch, the brake device 2-1 of the servo motor 2 is started and works.
In a preferred embodiment of the present invention, the acoustic sensor 11 must be equipped with a windshield during testing, so as to reduce the interference of wind noise on the measurement result during movement.
Claims (2)
1. Fuel tank noise measurement drive test platform, including the base, its characterized in that sets up the track on the base, and motor support, screw support are connected respectively to the base, motor leg joint servo motor, and servo motor contains arresting gear, screw support connection lead screw, is provided with the shaft coupling between servo motor and lead screw, the shaft coupling is flexible coupling, screw connection slip table, and speedtransmitter, acceleration sensor are connected to the slip table, and slider and rail contact on the slip table are connected, and the microphone support is connected to the slip table, and microphone leg joint sound sensor, the wind cap is connected to sound sensor, and limit switch is installed at the base both ends, and servo motor's arresting gear is connected to limit switch.
2. The fuel tank noise measurement drive test bed of claim 1, wherein the lead screw is a ball screw, the lead screw being hollow.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710689903.9A CN107588916B (en) | 2017-08-08 | 2017-08-08 | Fuel tank noise measurement drive test bed |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710689903.9A CN107588916B (en) | 2017-08-08 | 2017-08-08 | Fuel tank noise measurement drive test bed |
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| Publication Number | Publication Date |
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| CN107588916A CN107588916A (en) | 2018-01-16 |
| CN107588916B true CN107588916B (en) | 2020-06-09 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201710689903.9A Active CN107588916B (en) | 2017-08-08 | 2017-08-08 | Fuel tank noise measurement drive test bed |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109459128B (en) * | 2018-09-27 | 2021-11-19 | 上海理工大学 | Oil liquid shaking noise test system for automobile fuel tank |
| CN109916503A (en) * | 2019-03-22 | 2019-06-21 | 重庆长安汽车股份有限公司 | A kind of fuel tank rocks sounding method for testing |
| CN112985824B (en) * | 2019-12-18 | 2024-03-15 | 广州汽车集团股份有限公司 | Oil shaking test bed and oil shaking test method |
| CN114558848A (en) * | 2022-02-28 | 2022-05-31 | 歌尔股份有限公司 | Full-automatic UV cleaning equipment |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2434094Y (en) * | 2000-08-30 | 2001-06-13 | 中国科学院沈阳自动化研究所 | Lead screw drive gear |
| KR100802753B1 (en) * | 2006-11-08 | 2008-02-12 | 기아자동차주식회사 | Testing device for evaluating fuel flowing sound in fuel tank |
| CN103454056B (en) * | 2013-09-05 | 2015-09-30 | 亚普汽车部件股份有限公司 | Fuel tank noise testing simulation brake test table |
| CN103955043B (en) * | 2014-05-15 | 2015-12-02 | 哈尔滨工业大学 | A kind of five dimension high accuracy platforms for large scale grating installation testing |
| KR20160069121A (en) * | 2014-12-08 | 2016-06-16 | 주식회사 동희산업 | Testing apparatus for evaluating fuel flowing sound in fuel tank |
| CN205300751U (en) * | 2015-12-23 | 2016-06-08 | 扬州大学 | Car fuel tank test bench device of making an uproar falls |
| CN206740348U (en) * | 2017-04-27 | 2017-12-12 | 比亚迪股份有限公司 | Oil shocking testing stand |
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