CN220380748U - Multifunctional three-shaft four-motor silencing chamber - Google Patents
Multifunctional three-shaft four-motor silencing chamber Download PDFInfo
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- CN220380748U CN220380748U CN202321945368.6U CN202321945368U CN220380748U CN 220380748 U CN220380748 U CN 220380748U CN 202321945368 U CN202321945368 U CN 202321945368U CN 220380748 U CN220380748 U CN 220380748U
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- 230000030279 gene silencing Effects 0.000 title description 7
- 230000005540 biological transmission Effects 0.000 claims abstract description 75
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 38
- 229910052742 iron Inorganic materials 0.000 claims abstract description 19
- 238000010521 absorption reaction Methods 0.000 claims description 7
- 238000012360 testing method Methods 0.000 abstract description 44
- 239000000178 monomer Substances 0.000 abstract description 10
- 230000000712 assembly Effects 0.000 abstract description 2
- 238000000429 assembly Methods 0.000 abstract description 2
- 230000002159 abnormal effect Effects 0.000 description 7
- 238000005259 measurement Methods 0.000 description 7
- 239000003921 oil Substances 0.000 description 6
- 230000001133 acceleration Effects 0.000 description 4
- 239000010705 motor oil Substances 0.000 description 4
- 229920000742 Cotton Polymers 0.000 description 3
- 238000004458 analytical method Methods 0.000 description 3
- 238000001816 cooling Methods 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 238000002360 preparation method Methods 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 239000000725 suspension Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 description 1
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Abstract
A three-axis four-motor multifunctional anechoic chamber belongs to the technical field of NVH test. The sound-absorbing inner house is provided with an engine load dynamometer motor room and a transmission load dynamometer motor room outside, the inner bottom surfaces of the sound-absorbing inner house and the transmission load dynamometer motor room are provided with an iron floor foundation, the iron floor foundation is provided with the engine load dynamometer motor, the transmission load dynamometer motor and a driving dynamometer, a transmission shaft is connected with an output shaft of the motor and an adapter flange, the transmission shaft is arranged on a bearing support seat, and the bearing support seats are all arranged on the iron floor foundation. The utility model can realize that the same anechoic chamber meets the vibration noise test requirements of a transmission monomer, an engine monomer and a power assembly, and can be directly used for evaluating the noise of different power assemblies.
Description
Technical Field
The utility model relates to a multifunctional three-shaft four-motor anechoic chamber, and belongs to the technical field of NVH (noise, vibration and harshness) testing.
Background
In the development roads for improving the NVH performance of the power assembly products and solving the NVH level of the products, the technology for testing the vibration noise of the power assembly of the bench in the semi-anechoic room environment plays a significant role. The vibration noise test has higher requirements on the acoustic environment, the test result is required to be influenced by background noise and environmental reflection noise, the semi-anechoic chamber can provide a free sound field acoustic environment for the vibration noise test, and the test equipment of the low-noise dynamometer is configured in the semi-anechoic chamber to complete the vibration noise test of each working condition required by the power assembly product.
At present, noise control of a power assembly product is mainly carried out by respectively setting noise limit values for an engine and a transmission unit to evaluate and control the noise level of the product, and the noise limit values of the engine unit or the transmission unit cannot directly evaluate the noise level of the power assembly. In addition, independent semi-anechoic chambers are built in China respectively by adopting a transmission monomer, an engine monomer and a power assembly to meet the vibration noise test of a single product, and compared with conventional performance and reliability bench test equipment, the semi-anechoic chamber test equipment has the characteristics of high manufacturing cost, long construction period, complex structure and the like, so that the number of semi-anechoic chambers of the power assembly product in China is obviously less than that of conventional performance and reliability test benches, and the resource shortage condition of the semi-anechoic chamber of the power assembly product is caused.
Disclosure of Invention
In order to solve the problems in the background technology, the utility model provides a triaxial four-motor multifunctional silencing chamber.
The utility model adopts the following technical scheme: a triaxial four-motor multifunctional silencing chamber comprises a sound absorption inner room, a transmission load power measuring motor, an engine load power measuring motor, an iron floor foundation, a transmission shaft, a driving power measuring machine, a transmission load power measuring motor, an engine load power measuring motor, a bearing support seat and an adapter flange; the sound-absorbing inner room is characterized in that an engine load dynamometer motor room and two transmission load dynamometer motors are arranged on the outer side of the sound-absorbing inner room, the engine load dynamometer motor room and the inner bottom surfaces of the two transmission load dynamometer motors are respectively provided with an iron floor foundation, the iron floor foundation between the engine load dynamometer motors is provided with the engine load dynamometer motor, each iron floor foundation between the transmission load dynamometer motors is respectively provided with a transmission load dynamometer motor, an output shaft of the engine load dynamometer motor and an output shaft of each transmission load dynamometer motor are respectively fixedly connected with one end of a corresponding transmission shaft, the other end of each transmission shaft is arranged on a corresponding bearing support seat, each bearing support seat is arranged on the iron floor foundation of the sound-absorbing inner room, and the other end of each transmission shaft connected with the transmission load dynamometer motor is provided with an adapter flange; the iron floor foundation of the sound absorption inner room is also provided with a driving dynamometer.
Compared with the prior art, the utility model has the beneficial effects that:
according to the utility model, the engine and the power measuring motor required by the transmission test are arranged in the same silencing chamber, so that the same silencing chamber can meet the vibration noise test requirements of the transmission monomer, the engine monomer and the power assembly, and can be directly used for evaluating different power assembly noises, thereby controlling the noise level of a power assembly product, meeting the acoustic environment test requirements related to a power assembly noise evaluation method, and ensuring that the acoustic environments of the transmission, the engine and the power assembly noise test are not different.
Drawings
FIG. 1 is a schematic diagram of the structure of the present utility model;
FIG. 2 is a flow chart of the method of the present utility model;
FIG. 3 is a transmission cell test schematic;
FIG. 4 is a schematic illustration of an engine unit test;
fig. 5 is a powertrain test schematic.
Detailed Description
The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model, and it is apparent that the described embodiments are only some embodiments of the utility model, but not all embodiments, and all other embodiments obtained by those skilled in the art without making creative efforts based on the embodiments of the present utility model are all within the protection scope of the present utility model.
A triaxial four-motor multifunctional silencing chamber comprises a sound absorbing inner room 1, a transmission load power measuring motor room 2, an engine load power measuring motor room 3, an iron floor foundation 5, a transmission shaft 9, a driving power measuring machine 12, a transmission load power measuring motor 13, an engine load power measuring motor 14, a bearing support seat 16 and an adapter flange 19; the outside of the sound-absorbing inner room 1 is provided with an engine load dynamometer motor room 3 and two transmission load dynamometer motor rooms 2, dividing walls are arranged between the transmission load dynamometer motor rooms 2 and the engine load dynamometer motor room 3 and the sound-absorbing inner room 1, and the dividing walls are provided with holes for installing transmission shafts; the sound-absorbing inner room 1, the engine load dynamometer motor room 3 and the inner bottom surfaces of the two transmission load dynamometer motor rooms 2 are respectively provided with an iron floor foundation 5, and the four iron floor foundations 5 are positioned at the same horizontal height; an engine load dynamometer motor 14 is arranged on the iron floor foundation 5 of the engine load dynamometer motor room 3, a transmission load dynamometer motor 13 is arranged on the iron floor foundation 5 of each transmission load dynamometer motor room 2, an output shaft of the engine load dynamometer motor 14 and an output shaft of each transmission load dynamometer motor 13 are fixedly connected with one end of a corresponding transmission shaft 9 respectively, the other end of each transmission shaft 9 is arranged on a corresponding bearing support seat 16, each bearing support seat 16 is arranged on the iron floor foundation 5 of the sound absorption internal room 1, and an adapter flange 19 is arranged at the other end of each transmission shaft 9 connected with the transmission load dynamometer motor 13; still be equipped with drive dynamometer machine 12 on the iron floor foundation 5 of inhaling the sound house 1, drive dynamometer machine 12 selects IGUSTA 1002072 for use, and its pedestal mounting has elastic mechanism, can realize the free movement position on the iron floor foundation 5, and drive dynamometer machine 12 accessible screw and slide mechanism on it realize high and rotation angle adjustment, adaptation different test piece installation demands.
The utility model discloses a method for evaluating power assembly noise through a triaxial four-motor multifunctional anechoic chamber, which comprises the following steps:
s1: performing a transmission unit noise test;
s101: preparation before test:
s10101: the front-drive transverse speed changer 21 is fixed on the driving dynamometer 12 through bolts;
s10102: the power measuring machine 12 and the transmission load power measuring motor 13 are regulated and driven, so that the carrying angle of the transmission 21 is the same as that of a real vehicle, the transmission load power measuring motor 13 is connected by using a half shaft of the real vehicle, and the transmission 21 is fixed with the iron floor foundation 5 through bolts after the position is regulated;
s10103: filling transmission oil into the transmission 21 and installing an oil temperature sensor;
s10104: microphones are respectively arranged at a position which is vertical to one meter outside an envelope surface at the upper end of the speed changer, an envelope surface at the left end, an envelope surface at the right end and an envelope surface at the rear end and a near field of 15cm of an angle of 45 degrees of an envelope surface at the rear end of the speed changer, and the heights of the microphones are consistent with the heights of an input shaft of the speed changer;
s10105: wrapping the stand column of the rack by sound absorbing cotton and cooling related equipment;
s10106: the transmission test shift mechanism maintains a forward gear mode;
s10107: the power meter 12 is driven to output torque through the operation of the rack control software, the transmission load power meter 13 is operated to absorb torque, the transmission warm-up is carried out, and the temperature of the transmission warm-up oil is controlled to be 80-90 ℃;
s102: the bench control software is used for driving the dynamometer 12 to output torque which is one third of the maximum torque of the matched engine and simulating the MAP full load of the engine to accelerate the transmission; the acceleration rate is 100rpm/s;
s103: driving the dynamometer 12 to output torque to match the full-closed deceleration load of the engine for speed reduction of the transmission; the speed-down and the speed-up are 100rpm/s;
s104: simulating an idle working condition, and driving the dynamometer 12 to output torque 3Nm and rotating at 750rpm;
s105: the steps S102-S104 are repeated for more than three times to acquire data, and real vehicle TCU data is adopted for direct connection and non-direct connection control of the hydraulic torque converter when the automatic transmission is tested;
s106: the near-field microphone data has no abnormal peak value or abnormal sound as effective data, and the data with good consistency of three times of test data are averaged to be used as analysis data;
s107: and carrying out average processing on the microphone data of one meter position of four enveloping surfaces of the upper end, the left end, the right end and the rear end of the transmission to obtain final recorded data.
S2: performing engine single noise test;
s201: preparation before test:
s20101: the engine 22 is fixed through upright post installation, and the flywheel end is connected with the engine load dynamometer motor 14;
s20102: the engine and the real vehicle are carried at the same carrying angle through carrying the real vehicle suspension and the bracket;
s20103: filling engine oil and installing an oil temperature sensor;
s20104: microphones are respectively arranged at positions which are vertical to one meter outside four enveloping surfaces of the upper end, the left end, the right end and the front end of the engine and 15cm near fields of 45-degree angles of the enveloping surfaces of the upper end of the engine, and the heights of the three microphones at the left end, the right end and the front end are consistent with the central height of the enveloping surfaces of the engine;
s20105: wrapping the stand column of the rack by sound-absorbing cotton and cooling related equipment;
s20106: the rack adjusts the corresponding throttle control voltage and performs calibration;
s20107: the operation bench control software starts the engine, the engine load dynamometer motor 14 operates to absorb torque, engine warm-up is carried out, the water temperature warm-up is controlled to be more than 80 ℃, and the engine oil warm-up is controlled to be more than 80 ℃ and not more than 130 ℃;
s202: the maximum torque of the engine 22 is one third of the fixed torque and the full throttle full load acceleration; the acceleration rate is 100rpm/s;
s203: engine throttle release sliding deceleration; the speed-down and the speed-up are 100rpm/s;
s204: idling working conditions of the heat engine;
s205: the steps S202-S204 are repeated for more than three times to collect data;
s206: the near-field microphone data has no abnormal peak value or abnormal sound as effective data, and the data with good consistency of three times of test data are averaged to be used as analysis data;
s207: and carrying out average processing on microphone data of one meter position of four enveloping surfaces of the upper end, the left end, the right end and the front end of the engine to obtain final recorded data.
S3: and (3) performing power assembly noise test:
s301: preparation before test:
s30101: the driving dynamometer 12 is moved out of the free sound field, the engine and the speed changer are assembled and then are fixed through the upright post installation, and a real vehicle half shaft is used for connecting the speed changer load dynamometer motor 13;
s30102: the engine and the speed changer are carried at the same carrying angle with the real vehicle through the suspension and the bracket of the real vehicle;
s30103: filling engine oil and transmission oil, and installing an oil temperature sensor;
s30104: microphones are respectively arranged at the positions which are vertical to one meter outside five enveloping surfaces of the upper end, the left end (a transmission side), the right end (a gear train side), the front end (an exhaust side) and the rear end (an air inlet side) of the power assembly, at the near field of a 45-degree angle 15cm of the enveloping surface of the upper end of the engine and at the near field of a 15-cm angle of the enveloping surface of the rear end of the transmission, and the heights of the four microphones at the left end, the right end, the front end and the rear end are consistent with the central height of a crankshaft;
s30105: wrapping the stand column of the bench and cooling related equipment by using sound-absorbing cotton;
s30106: the rack adjusts the corresponding throttle control voltage and performs calibration;
s30107: the operating bench control software starts the engine, the transmission load dynamometer motor 13 operates to absorb torque, power assembly warm-up is carried out, water temperature warm-up is controlled to be more than 80 ℃, and engine oil warm-up is controlled to be more than 80 ℃ and not more than 130 ℃;
s302: the maximum torque of the engine is one third of the fixed torque and the full throttle full load is accelerated; the acceleration rate is 100rpm/s;
s303: engine throttle release sliding deceleration; the speed-down and the speed-up are 100rpm/s;
s304: idle speed working conditions of the neutral gear or P gear heat engine;
s305: the steps S302-S304 are repeated for more than three times to collect data;
s306: the near-field microphone data has no abnormal peak value or abnormal sound as effective data, and the data with good consistency of three times of test data are averaged to be used as analysis data;
s307: and carrying out average processing on microphone data of one meter of five enveloping surfaces of the upper end, the left end, the right end, the front end and the rear end of the power assembly to obtain final recorded data.
S4: and comparing the power assembly noise test value with a reference noise value, and evaluating the power assembly noise level.
If the power assembly noise test value is smaller than the reference noise value or the power assembly noise test value is larger than the reference noise limit value and is in the range of 0-3dB (A), the power assembly noise level is qualified;
if the powertrain noise test value is greater than the reference noise value by more than 3dB (A), the powertrain noise level is indicated to be unacceptable.
The utility model is based on the single-body test noise sound pressure level of the speed changer and the single-body test noise pressure level of the engine, and requires that more than 3 speed changers and engines are required to be randomly extracted for testing by different power assemblies, and the average value of a plurality of test prototypes is taken as a final effective value. Meanwhile, the test data analyze the noise of the near-field measuring point microphone, if abnormal conditions such as obvious peak values, resonance bands and the like occur, the data of the sample machine cannot be used, other sample machines need to be replaced for retesting, and the number of samples and the data effectiveness are ensured.
The noise test values of the transmission monomer and the engine monomer are given to different weight coefficients, different working conditions and different transmissions and engine weight coefficients, the value principle of the noise weight coefficient K1 of the engine monomer and the noise weight coefficient K2 of the transmission monomer are shown in the following table 1, and specific values are determined according to the noise test results of the prototype and the noise database of the same type of products.
Giving a power assembly noise reference sound pressure level according to a transmission single body test noise sound pressure level and an engine single body test noise sound pressure level, comparing a power assembly actual measurement noise sound pressure level with a reference noise sound pressure level as shown in a calculation formula 1 of the power assembly noise reference one meter sound pressure level, evaluating a product noise level through a difference value between the power assembly actual measurement noise sound pressure level and the reference noise sound pressure level, and if the power assembly actual measurement noise sound pressure level is smaller than the reference noise sound pressure level or the power assembly actual measurement noise sound pressure level is larger than the reference noise value by 0-1dB (A), indicating that the power assembly noise is good; if the actual measured noise sound pressure level of the power assembly is 1-3dB (A) greater than the reference noise sound pressure level, the power assembly noise is qualified; and if the actual measurement noise sound pressure level of the power assembly is more than 3dB (A) of the reference noise sound pressure level difference value, the power assembly noise is unqualified.
Table 1 weight coefficient assignment description
SPL P : reference meter sound pressure level of power assembly
SPL E : engine single body actual measurement average-meter sound pressure level
SPL T : transmission single body actual measurement average-meter sound pressure level
It will be evident to those skilled in the art that the utility model is not limited to the details of the foregoing illustrative embodiments, and that the present utility model may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, the scope of the utility model being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present disclosure describes embodiments, not every embodiment is provided with a separate embodiment, and that this description is provided for clarity only, and that the disclosure is not limited to the embodiments described in detail below, and that the embodiments described in the examples may be combined as appropriate to form other embodiments that will be apparent to those skilled in the art.
Claims (2)
1. A multifunctional three-shaft four-motor anechoic chamber is characterized in that: the device comprises a sound absorption internal room (1), a transmission load power measuring motor room (2), an engine load power measuring motor room (3), a transmission shaft (9), a driving power measuring machine (12), a transmission load power measuring motor (13), an engine load power measuring motor (14), a bearing support seat (16) and an adapter flange (19); the sound absorption house is characterized in that an engine load dynamometer motor room (3) and two transmission load dynamometer motor rooms (2) are arranged on the outer side of the sound absorption house (1), an engine load dynamometer motor (14) is arranged in each transmission load dynamometer motor room (3), a transmission load dynamometer motor (13) is arranged in each transmission load dynamometer motor room (2), an output shaft of each engine load dynamometer motor (14) and an output shaft of each transmission load dynamometer motor (13) are fixedly connected with one end of a corresponding transmission shaft (9) respectively, the other end of each transmission shaft (9) is arranged on a corresponding bearing support seat (16), and an adapter flange (19) is arranged at the other end of each transmission shaft (9) connected with the transmission load dynamometer motor (13); the iron floor foundation (5) of the sound absorption inner room (1) is also provided with a driving dynamometer (12).
2. A triaxial four-motor multifunctional sound deadening chamber according to claim 1, characterized in that: inhale interior room (1), engine load dynamometer inter (3) and the interior bottom surface between two derailleur load dynamometer inter (2) all are equipped with indisputable floor foundation (5), be equipped with engine load dynamometer motor (14) on indisputable floor foundation (5) between engine load dynamometer inter (3), every all be equipped with derailleur load dynamometer motor (13) on indisputable floor foundation (5) between derailleur load dynamometer inter (2), inhale and be equipped with bearing support seat (16) on indisputable floor foundation (5) of interior room (1).
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| Application Number | Priority Date | Filing Date | Title |
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| CN202321945368.6U CN220380748U (en) | 2023-07-21 | 2023-07-21 | Multifunctional three-shaft four-motor silencing chamber |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202321945368.6U CN220380748U (en) | 2023-07-21 | 2023-07-21 | Multifunctional three-shaft four-motor silencing chamber |
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