CN206891720U - Axle noise test system - Google Patents
Axle noise test system Download PDFInfo
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- CN206891720U CN206891720U CN201720591830.5U CN201720591830U CN206891720U CN 206891720 U CN206891720 U CN 206891720U CN 201720591830 U CN201720591830 U CN 201720591830U CN 206891720 U CN206891720 U CN 206891720U
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Abstract
It the utility model is related to axle noise test system, including motor, load motor and drive axle to be measured, motor is connected by power transmission shaft with the input of drive axle to be measured, two output ends of drive axle to be measured respectively connect a load motor, the noise that drive axle is sent is detected using motor and the actual operating mode of load motor analog-driven bridge, and using the noise detection apparatus arranged at drive axle to be measured.Operating condition during according to vehicle actual motion, the load parameter of rotary speed parameter and load motor to motor is set, realize the full working scope noise testing under drive axle loading condition, drive axle approximation is run on actual operating mode, make axle noise test result more close to true horizon during vehicle actual motion.Therefore, the test system truly reflects noise level when being run on drive axle vehicle, and measurement condition is comprehensive, test value true and accurate, and the test result degree of accuracy is high.
Description
Technical field
It the utility model is related to axle noise test system.
Background technology
Drive axle is the important transmission parts of current commercial chassis, and it is located at the end of transmission system, is mainly subtracted by master
Fast device, differential mechanism, semiaxis and driving axle housing composition.Drive axle major function is to increase the dynamic torque of engine by reduction of speed to turn round
Process be delivered to both sides tire on the drive wheels, ensure normal vehicle operation, in the process, because back axle master subtracts the engagement of gear,
Necessarily lead to noise, and radiated by driving axle housing, influence vehicle noiseproof feature.
For this bulk noise of control drive axle, automobile industry standard QC/533 defines the measurement side of axle noise stand
Method, but because stand load condition is zero load, while the test rotating speed of drive axle just corresponds to the 50km/h of actual vehicle speed,
For current commercial car 60-90km/h conventional speed, the simulation test condition of stand and the use state gap of actual vehicle
It is larger, drive axle body noise level can not be accurately reflected.
Publication No. CN203672476U Chinese patent document provides a kind of measurement axle noise on vehicle
Device, the device are transferred to after sound insulation tube by voice conducting pipe and measured by noise by taking sound head to collect the noise in drive axle
Amount, the test device are tested axle noise on vehicle, and drive axle body is true operating condition, so, the survey
Trial assembly, which is put, to be had the following disadvantages：1st, sound head is taken to be located at Drive axle housing vicinity, although making an uproar for drive axle can be read
Sound, but because drive axle is in actual motion, therefore, other noise (such as the engine body noises, road surface tire on chassis
Make an uproar, wind is made an uproar, Gear-Box etc.) also it is read in the lump, and other noises of chassis cannot be distinguished by out with axle noise, cause
The noise distortion of test；2nd, sound head is taken to need to be transmitted by a series of equipment such as voice conducting pipe, sound proof box after reading noise,
During this, the noise figure that drive axle is nearby read causes car because the reasons such as bang path length, contact component are decayed
Interior noise meter test value is much smaller than actual value, test data distortion.
Utility model content
The purpose of this utility model is to provide a kind of axle noise test system, to solve drive axle in actual motion
In the problem of can not accurately detecting axle noise.
To achieve the above object, scheme of the present utility model includes a kind of axle noise test system, including driving electricity
Machine, load motor and drive axle to be measured, the motor is connected by power transmission shaft with the input of drive axle to be measured, described to treat
Two output ends for surveying drive axle respectively connect a load motor, and drive axle to be measured is simulated using motor and load motor
Actual operating mode, noise detection apparatus is disposed with drive axle to be measured, the noise for being sent to drive axle to be measured is examined
Survey.
The noise detection apparatus includes three noise detection modules, and the drive axle to be measured can be detected by being arranged in
Send three inspection positions of noise.
Three test positions respectively based on subtract in the middle part of shell top apart from axle housing 300mm at, the rear of axle housing bonnet middle part
At axle housing 300mm and above unilateral semiaxis at axle housing 300mm.
The drive axle to be measured is arranged in an anechoic room, and the motor and load motor are arranged in the noise elimination
It is outdoor.
Vertical columns are provided with the anechoic room, the drive axle to be measured is arranged on the vertical columns.
Axle noise test system provided by the utility model is a test platform, and drive axle to be measured is placed in into the survey
Trying in platform, drive axle is not at actual operating mode, but at the test condition.And because the test system pertains only to
Drive axle, so, be just not present in the test system engine body noise, road surface tire is made an uproar, wind is made an uproar, Gear-Box etc. other
Interference information, improve axle noise accuracy of detection.Also, the input of drive axle to be measured is connected with motor, to be measured
Two output ends of drive axle respectively one load motor of connection, also, utilize the noise detection apparatus arranged at drive axle to be measured
To be detected to the noise that drive axle is sent.Using motor and the actual operating mode of load motor analog-driven bridge,
Input speed of the rotating speed of motor output as drive axle to be measured, also, increased in measurement condition based on vehicle running status
Add half axle load, certain moment of torsion exported to simulate vehicle actual loading using load motor, realize drive axle running status with
Vehicle drive axle operating condition is consistent, realizes the noise testing under analog-driven bridge actual loading state.Therefore, according to whole
Operating condition during car actual motion, the load parameter of rotary speed parameter and load motor to motor are set, real
Real working condition noise testing under existing drive axle loading condition, makes drive axle approximation run on actual operating mode, ensures driving
Bridge noise testing result is close to true horizon during vehicle actual motion.Therefore, the test system truly reflects drive axle vehicle
Noise level during upper operation, test value true and accurate, the test result degree of accuracy are high.In addition, by controlling turning for motor
Speed change, drive axle to be measured can be made to run on acceleration mode, at the uniform velocity state and deceleration regime, meet drive axle to be measured this three
Noise testing under kind state, because under normal circumstances, drive axle only exists these three states, then, the test system can
Realize comprehensive noise testing of running status.
Brief description of the drawings
Fig. 1 is the top view of axle noise test system；
Fig. 2 is the front view of axle noise test system；
Fig. 3 is noise measuring point A and C location arrangements schematic diagram；
Fig. 4 is noise measuring point B location arrangements schematic diagram；
Wherein, 1 is half spindle motor, and 2 be motor, and 3 be semianechoic room, and 4 be power transmission shaft, and 5 be vertical columns, and 6 be to treat
Survey drive axle.
Embodiment
The utility model is described in more detail below in conjunction with the accompanying drawings.
Axle noise test system provided by the utility model includes motor, load motor and drive axle to be measured,
Wherein, the number of motor is one, and the number of load motor is two, and motor and load motor can be existing
Motor.In the present embodiment, load motor is half spindle motor.As shown in figure 1, the output end of motor 2 by power transmission shaft 4 with
The input connection of drive axle 6 to be measured, drive axle to be measured have two semiaxis output ends, and each semiaxis output end passes through power transmission shaft 4
It is connected on half spindle motor 1.Moreover, also including an anechoic room in the test system, the present embodiment is semianechoic room, drive to be measured
Dynamic bridge 6 is arranged in semianechoic room 3, can avoid the interference of external noise in test process, also, motor 2 and semiaxis
Motor 1 is arranged in outside semianechoic room 3, and noise of motor caused by both motors can be avoided to influence the test knot of axle noise
Fruit.In addition, in order to which drive axle 6 to be measured is fixed in semianechoic room 3, vertical columns 5 are additionally provided with semianechoic room 3, such as Fig. 2
Shown, drive axle 6 to be measured is fixedly mounted on vertical columns 5 by U-bolt, also, in order to reach actual operating mode
Effect, the installation fixed form of drive axle 6 to be measured are consistent with vehicle.
Noise detection apparatus is provided with the test system, the noise detection apparatus is referred to as sound level measurement in the present embodiment
Test system.Sound level meter test system is arranged at drive axle 6 to be measured, and the noise that can be sent to drive axle 6 to be measured detects.
Sound level meter test system includes at least one noise detection module, is made an uproar for gather that drive axle 6 to be measured sends
Sound, certainly, noise detection module may be also associated with processing equipment, for carrying out correspondingly handling and detecting to noise data,
Because processing equipment belongs to routine techniques, and it is unrelated with utility model point of the present utility model, just no longer illustrate here.
Noise detection module, the present embodiment is by taking microphone as an example, and the number that it is set is related to the precision of required detection, microphone
Number is more, is arranged in the coherent detection position of drive axle 6 to be measured, obtained data are more, can by averaged
Obtain more accurately result.For convenience of description, in the present embodiment, the number of microphone is three, is microphone A, B respectively
And C, these three microphones are fixed on three inspection positions near the axle housing of drive axle 6 to be measured, this reality by fixed support
Apply example and provide three specific test positions, certainly, as other embodiments, can also be that other can detect driving to be measured
The position of the noise of bridge 6.As shown in Figures 3 and 4, microphone A is arranged in main subtract in the middle part of shell on (i.e. main to subtract at gear engagement center)
Side is at axle housing 300mm, and microphone C is arranged in above unilateral semiaxis at axle housing 300mm, and microphone B is arranged in axle housing
Rear is at shell 300mm in the middle part of bonnet.These three microphones can detect drive axle 6 to be measured from respective test position
Noise, the final noise figure of drive axle 6 to be measured are the average value of this noise testing value at three.
The actual operating mode of drive axle 6 to be measured is simulated using the spindle motor 1 of motor 2 and half, wherein, will be required
Speed is scaled the rotating speed of the output of motor 2, input speed of the rotating speed as drive axle 6 to be measured that motor 2 exports, and
And half axle load is increased based on vehicle running status in measurement condition, it is whole to simulate to export certain moment of torsion using half spindle motor 1
Car actual loading, realize the drive axle running status (technical parameter such as load, rotating speed one consistent with vehicle drive axle operating condition
Cause), realize the noise testing under drive axle load condition.Utilize motor and the actual motion of load motor analog-driven bridge
Operating mode is specially：Pass through speed s (such as s=90km/h=90*1000/3600m/s=25m/s) and tire radius r (such as r=
0.46m), tire rotational speed n (n=s/ (2* π * r)=6.63) is conversed, tire rotational speed n is half rotating speed, then passes through main deceleration
Master can be obtained than f (such as f=3.91) and subtracts input rotating speed w (w=n*f=25.9 revolutions per seconds=1555rpm), main turn reducing speed w
(1555rpm) is the input speed of motor, passes through the control (being arranged to w=1555rpm) to motor rotating speed
Realize " motor exports input speed of the rotating speed corresponding with requiring speed as drive axle to be measured "；For " load electricity
Machine exports actual loading of the corresponding moment of torsion as vehicle " this implementation process, mainly by the calculating to vehicle resistance (hereafter
Middle ∑ F calculating process) it is converted on tire, the torque value of drive axle both ends tire resistance is obtained, the torque value is vehicle
Drive axle reality output moment of torsion, the torque value is arranged to the output torque of load motor, that is, realizes the load of drive axle test
Operating mode is actual operating mode.
Operating condition when therefore, according to vehicle actual motion, rotary speed parameter and half spindle motor to motor 2
1 load parameter is set, and is realized the full working scope noise testing under drive axle loading condition, drive axle approximation is run on reality
Border operating condition, make axle noise test result more close to true horizon during vehicle actual motion.In addition, meet driving
Bridge load condition, realize that drive axle is positive, reversely rotates, with the drive axle operating condition (bar such as load, rotating speed under whole vehicle state
Part) it is consistent.
To realize comprehensive test of drive axle 6 to be measured, its measurement condition is divided into three kinds of measurement conditions, as constant speed operating mode,
Accelerating mode and (counter to drag) operating mode of slowing down, correspond at the uniform velocity operating mode, accelerating mode and the coasting mode during vehicle operation respectively.This reality
Apply in example, at the uniform velocity corresponding speed has 60km/h, 70km/h, 80km/h, 90km/h, and velocity variations corresponding to accelerating mode are
60km/h-90km/h, velocity variations corresponding to coasting mode are 90km/h-60km/h, so set speed to ensure to be measured
All operating modes during the measurement condition covering vehicle normal operation of drive axle 6.Under each operating mode, the input of drive axle 6 to be measured turns
Fast (i.e. the rotating speed of motor 2) is according to vehicle operating condition and is formed by parameter conversions such as tire radius, drive axle 6 to be measured
The load of semiaxis output end is according to tyre load (∑ F=Ff+Fw+Fi+Fj, each parameter be specifically shown in Table 1) conversion obtain, will calculate
To drive axle input rotating speed to be measured exported by motor 2 to drive axle 6 to be measured, and drive axle to be measured is driven with this rotating speed
6 operations；The half shaft to be measured being calculated is loaded and exported by half spindle motor 1, and drive to be measured is acted on this load value
On the dynamic semiaxis of bridge 6, realize and be in stress state when drive axle 6 to be measured is run, ensure the operating condition and vehicle of drive axle to be measured
Drive axle operating condition state consistency during operation.
Table 1
It should be noted that the test of axle noise is the measurement condition with reference to vehicle internal car noise, vehicle noise is surveyed
Be during examination vehicle in flat road normally travel, climb and fall traveling is use operating mode very much, therefore axle noise test is born
Carrying operating mode does not include grade resistance calculating.So vehicle does not consider slope in flat road normally travel in noise test
Resistance Fi is spent, i.e. grade resistance is 0.
The specific testing procedure of three kinds of measurement conditions of axle noise is illustrated below in conjunction with specific data：
Measurement condition one：Constant speed operating mode
Step 1：Motor 2 drives drive axle 6 to be measured to run and controls its output end rotating speed, maintains at the required speeds
(being obtained according to vehicle conversion of testing the speed)；
Step 2：Half spindle motor 1 starts and service load is acted on to the semiaxis both ends of drive axle 6 to be measured；
Step 3：After 6 steady running of drive axle to be measured, sound level meter test system and test noise, time of measuring 10s are opened；
Step 4：Noise figure at three near drive axle 6 to be measured is recorded by microphone A, B and C, averages, is somebody's turn to do
The noise figure of drive axle to be measured under operating mode；
Step 5：Continuously measured using above-mentioned steps twice, as a result take its average value；
Step 6：Form according to table 2 and table 3 outputs test result.
Measurement condition two：Accelerating mode
Step 1：Motor 2 controls the input rotating speed of drive axle 6 to be measured, and stabilizes it in initial speed；
Step 2：Half spindle motor 1 starts and service load is acted on to the semiaxis both ends of drive axle 6 to be measured；
Step 3：After 6 steady running of drive axle to be measured, the load of the end of half spindle motor 1 keeps constant, adjusts 2 turns of motor
Speed, makes it ramp up to end of a period rotating speed, opens sound level meter test system and test noise simultaneously with this；
Step 4：Noise figure at three near drive axle 6 to be measured is recorded by microphone A, B and C, averages, is somebody's turn to do
The noise figure of drive axle to be measured under operating mode；
Step 5：Continuously measured using above-mentioned steps twice, as a result take its average value；
Step 6：Form according to table 2 and table 3 outputs test result.
Measurement condition three：Deceleration (counter to drag) operating mode
Step 1：Half spindle motor 1 controls the input rotating speed of drive axle 6 to be measured by output end semiaxis, and stabilizes it first
Beginning rotating speed；
Step 2：Motor 2 starts and service load is acted on to the drive end of drive axle 6 to be measured；
Step 3：After 6 steady running of drive axle to be measured, the load of motor 2 keeps constant, adjusts 1 turn of half spindle motor
Speed, it is decelerated to end of a period rotating speed, open the test noise of sound level meter test system 6 simultaneously with this；
Step 4：Noise figure at three near drive axle 6 to be measured is recorded by microphone A, B and C, averages, is somebody's turn to do
The noise figure of drive axle to be measured under operating mode；
Step 5：Continuously measured using above-mentioned steps twice, as a result take its average value；
Step 6：Form according to table 2 and table 3 outputs test result.
This measurement condition is (counter to drag) operating mode, as vehicle accelerator releasing sliding state of slowing down, because the effect of inertia force makes
It is rotating speed input to obtain entire vehicle tyre end, and tire drives the main gear that subtracts to rotate, and therefore drives engine crankshaft rotation (this process
Active force is just reverse when at the uniform velocity travelling and give it the gun with vehicle), now driving bridge main reducing assembly is that basin cingulum moves driving tooth
Rotation (drives basin tooth spiral to turn) when vehicle is at the uniform velocity travelled and given it the gun for driving tooth, it is therefore desirable to is controlled by half spindle motor 1
The rotating speed of drive axle 6, motor 2 control load (purpose is that drive end drives driving tooth rotation also for guarantee basin tooth).
Simultaneously as this measurement condition is decelerating mode, it is therefore necessary to by controlling the rotating speed of half spindle motor 1, could realize deceleration regime.
Table 2
Table 3
Specific embodiment is presented above, but the utility model is not limited to described embodiment.This practicality
New basic ideas are above-mentioned basic scheme, for those of ordinary skill in the art, according to teaching of the present utility model,
Design the models of various modifications, formula, parameter and creative work need not be spent.Principle of the present utility model is not being departed from
The scope of protection of the utility model is still fallen within the change, modification, replacement and modification carried out in the case of spirit to embodiment
It is interior.
Claims (5)
1. a kind of axle noise test system, it is characterised in that including motor, load motor and drive axle to be measured, institute
State motor to be connected with the input of drive axle to be measured by power transmission shaft, two output ends of the drive axle to be measured respectively connect
One load motor, simulates the actual operating mode of drive axle to be measured using motor and load motor, at drive axle to be measured
Noise detection apparatus is disposed with, the noise for being sent to drive axle to be measured detects.
2. axle noise test system according to claim 1, it is characterised in that the noise detection apparatus includes three
Individual noise detection module, three inspection positions that the drive axle to be measured sends noise can be detected by being arranged in.
3. axle noise test system according to claim 2, it is characterised in that three test positions are respectively
It is main subtract in the middle part of shell top apart from axle housing 300mm at, axle housing bonnet middle part rear at axle housing 300mm and above unilateral semiaxis away from
At axle housing 300mm.
4. axle noise test system according to claim 1, it is characterised in that the drive axle to be measured is arranged in one
In individual anechoic room, the motor and load motor are arranged in outside the anechoic room.
5. axle noise test system according to claim 4, it is characterised in that be provided with fixation in the anechoic room
Column, the drive axle to be measured are arranged on the vertical columns.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720591830.5U CN206891720U (en) | 2017-05-23 | 2017-05-23 | Axle noise test system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720591830.5U CN206891720U (en) | 2017-05-23 | 2017-05-23 | Axle noise test system |
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| Publication Number | Publication Date |
|---|---|
| CN206891720U true CN206891720U (en) | 2018-01-16 |
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ID=61320668
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| CN201720591830.5U Active CN206891720U (en) | 2017-05-23 | 2017-05-23 | Axle noise test system |
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| CN (1) | CN206891720U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108931374A (en) * | 2017-05-23 | 2018-12-04 | 郑州宇通客车股份有限公司 | A kind of axle noise test macro |
-
2017
- 2017-05-23 CN CN201720591830.5U patent/CN206891720U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108931374A (en) * | 2017-05-23 | 2018-12-04 | 郑州宇通客车股份有限公司 | A kind of axle noise test macro |
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| GR01 | Patent grant | ||
| CP03 | Change of name, title or address |
Address after: 450061 Yudao Road, Guancheng District, Zhengzhou City, Henan Province Patentee after: Yutong Bus Co.,Ltd. Address before: 450016 Yutong Industrial Zone, eighteen Li River, Henan, Zhengzhou Patentee before: ZHENGZHOU YUTONG BUS Co.,Ltd. |
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| CP03 | Change of name, title or address |