CN218035679U - Acoustic experimental device for NVH (noise, vibration and harshness) test of power assembly for new energy vehicle - Google Patents
Acoustic experimental device for NVH (noise, vibration and harshness) test of power assembly for new energy vehicle Download PDFInfo
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- CN218035679U CN218035679U CN202221683603.2U CN202221683603U CN218035679U CN 218035679 U CN218035679 U CN 218035679U CN 202221683603 U CN202221683603 U CN 202221683603U CN 218035679 U CN218035679 U CN 218035679U
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Abstract
The utility model relates to an acoustics experimental apparatus that is used for automobile-used power assembly NVH of new forms of energy to test, the device includes: a special-shaped inner house; the sound absorption structure is attached to the inner wall surface of the special-shaped inner room; the inner room vibration isolation system is arranged at the bottom of the special-shaped inner room; the central traveling and hanging system is arranged at the top of the special-shaped inner room; an outer house surrounding the outer side of the special-shaped inner house; the high-speed dynamometer room is positioned outside the special-shaped wall surface of the special-shaped inner room and is communicated with the special-shaped inner room; the first low-speed power measurement machine room and the second low-speed power measurement machine room are positioned on two outer sides of the non-special-shaped wall surface of the outer room and are communicated with the special-shaped inner room. Compared with the prior art, the utility model has the advantages of satisfy the NVH test of sound power and sound pressure level under the multiple mode simultaneously, when carrying out above-mentioned NVH test, can guarantee that all dynamometer machines are in semi-anechoic outdoor portion, background noise and indoor sound absorption effect are better simultaneously.
Description
Technical Field
The utility model relates to a NVH testing arrangement especially relates to an acoustics experimental apparatus that is used for automobile-used power assembly NVH of new forms of energy to test.
Background
With the rapid expansion of new energy vehicles, various performances of high-speed motors and electric drive assemblies for new energy vehicles as power sources are widely concerned, and evaluation requirements of NVH (noise, vibration and harshness) performance as one of key performances are increasing.
In a conventional semi-anechoic chamber for testing an automobile power assembly NVH, in order to ensure that a microphone measuring point of a tested piece is positioned in a free field of the semi-anechoic chamber and avoid noise vibration of a dynamometer from influencing a test result in the semi-anechoic chamber, a conventional power assembly NVH test bench frame connects the dynamometer outside the semi-anechoic chamber and the tested piece in the semi-anechoic chamber through a long transmission shaft.
However, when the NVH test of the high-speed motor is carried out, the rotating speed is too high, the transmission shaft between the dynamometer and the tested piece cannot be very long, and the dynamometer can only be placed in a semi-noise elimination chamber and wrapped by a noise insulation cover, so that the NVH evaluation result of the tested piece is interfered to a great extent.
In addition, the integration level of the electric drive assembly for the new energy automobile is gradually improved, the requirement of assembly testing is increasingly important, and the torque and rotating speed requirements of a single motor and the assembly cannot be simultaneously considered in a plurality of silencing rooms, so that an acoustic experimental device which can evaluate the high-speed small-torque motor NVH and the low-speed large-torque electric drive assembly NVH and is minimally interfered by noise and vibration of a power machine is urgently needed in the industry at present.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing an acoustics experimental apparatus that is used for automobile-used power assembly NVH of new forms of energy to test in order to overcome the defect that above-mentioned prior art exists.
The purpose of the utility model can be realized through the following technical scheme:
according to the utility model discloses an aspect provides an acoustics experimental apparatus that is used for automobile-used power assembly NVH of new forms of energy to test, and the device includes:
a special-shaped inner house;
the sound absorption structure is attached to the inner wall surface of the special-shaped inner room;
the inner room vibration isolation system is arranged at the bottom of the special-shaped inner room;
the central traveling and hanging system is arranged at the top of the special-shaped inner room;
an outer house surrounding the outer side of the special-shaped inner house;
the high-speed dynamometer room is positioned outside the special-shaped wall surface of the special-shaped inner room and is communicated with the special-shaped inner room;
the first low-speed power measuring machine room and the second low-speed power measuring machine room are positioned on two outer sides of the non-special-shaped wall surface of the outer house and are communicated with the special-shaped inner house.
As a preferred technical solution, the sound absorbing structure includes:
the flat plate sound absorption structure is attached to the special-shaped wall surface on the inner side of the special-shaped inner room;
the ASA sound absorption structure is attached to the inner non-special-shaped wall surface of the special-shaped inner room.
As an optimal technical scheme, the special-shaped inner house is a special-shaped concrete inner house, the cross section of the special-shaped inner house is of a concave structure, and a high-speed dynamometer room is arranged at the lower concave part of the special-shaped inner house.
As a preferred technical scheme, the high-speed dynamometer room is communicated with the special-shaped inner room through a wall through hole formed in a special-shaped wall surface.
As a preferred technical scheme, the first low-speed power measurement machine room and the second low-speed power measurement machine room are communicated with the special-shaped inner room through wall through holes formed in corresponding wall surfaces of the special-shaped inner room and the special-shaped outer room.
As a preferred technical scheme, the interior room vibration isolation system comprises a first iron bottom plate and a first vibration isolation system paved on the lower portion of the first iron bottom plate.
According to a preferable technical scheme, a high-speed rack iron bottom plate and a second vibration isolation system paved on the lower portion of the high-speed rack iron bottom plate are arranged in the high-speed dynamometer room.
As a preferable technical scheme, a first low-speed iron bottom plate and a third vibration isolation system paved at the lower part of the first low-speed iron bottom plate are arranged in the first low-speed work measuring machine chamber.
In a preferred technical solution, a second low-speed iron bottom plate and a fourth vibration isolation system paved on the lower portion of the second low-speed iron bottom plate are arranged in the second low-speed dynamometer room.
As a preferable technical scheme, the special-shaped inner room and the outer room are separated by an air layer.
Compared with the prior art, the utility model has the advantages of it is following:
1) The utility model discloses can satisfy simultaneously single motor, the automatically controlled two unifications of motor, the trinity at most unification of electricity drive assembly, the NVH test of acoustic power and sound pressure level under the multiple mode such as the big motor of commercial car at most, can guarantee that all dynamometer machines are outside at half anechoic room simultaneously when carrying out above-mentioned NVH test, background noise and indoor sound absorption effect are better.
2) The utility model discloses the shape of high-speed dynamometer machine room is the dysmorphism, is guaranteeing that high-speed dynamometer machine reduces the length of high-speed transmission shaft under the outside prerequisite of semi-anechoic room furthest for the background noise that the operation got up reduces by a wide margin.
3) The utility model discloses mixed use ASA wedge material and dull and stereotyped sound absorbing material, the advantage that the thin advantage of thickness that has utilized dull and stereotyped sound absorbing material and the advantage that the cut-off frequency is high of ASA wedge material have synthesized and have guaranteed that the indoor whole sound absorption effect of half noise elimination is better.
Drawings
Fig. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic cross-sectional view of the present invention;
wherein 1 is the special-shaped interior room, 2 is dull and stereotyped sound absorbing structure, 3 is ASA sound absorbing structure, 4 are interior room vibration isolation system, 5 are central line system of hanging, 6 are outer room, 7 are first iron bottom plate, 8 are first vibration isolation system, 9 are high-speed dynamometer machine room, 10 are first low-speed merit machine room, 11 are second low-speed merit machine room, 12 are high-speed rack iron bottom plate, 13 are first low-speed iron bottom plate, 14 are second low-speed iron bottom plate, 15 are second vibration isolation system, 16 are third vibration isolation system, 17 are fourth vibration isolation system.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by a person skilled in the art without creative efforts shall fall within the protection scope of the present invention.
As shown in fig. 1 and fig. 2, the acoustic experimental apparatus for NVH testing of a power assembly for a new energy vehicle includes a special-shaped inner room 1, a flat sound absorption structure 2, an ASA sound absorption structure 3, an inner room vibration isolation system 4, a central crane system 5, an outer room 6, a high-speed dynamometer room 9, a first low-speed dynamometer room 10, and a second low-speed dynamometer room 11; wherein the ASA sound absorbing structure 3 employs a landed asymmetric sound absorber.
The flat sound absorption structure 2 is attached to the special-shaped wall surface on the inner side of the special-shaped inner room 1; the ASA sound absorption structure 3 is attached to the non-special-shaped wall surface on the inner side of the special-shaped inner room 1; the utility model discloses mixed use ASA wedge material and dull and stereotyped sound absorbing material, the advantage that the thin advantage of thickness that has utilized dull and stereotyped sound absorbing material and the advantage that the cut-off frequency is high of ASA wedge material have synthesized and have guaranteed that the indoor whole sound absorption effect of half noise elimination is better.
The inner room vibration isolation system 4 is arranged at the bottom of the special-shaped inner room 1; the central traveling crane system 5 is arranged at the top of the special-shaped inner room 1; the outer house 6 surrounds the outer side of the special-shaped inner house 1; the high-speed dynamometer room 9 is positioned outside the special-shaped wall surface of the special-shaped inner room 1 and is communicated with the special-shaped inner room 1; the first low-speed power measuring machine room 10 and the second low-speed power measuring machine room 11 are located on two outer sides of the non-special-shaped wall surface of the outer room 6 and are communicated with the special-shaped inner room 1. Namely the utility model discloses a high-speed dynamometer room 9, the different combinations of first low-speed dynamometer room 10 and second low-speed dynamometer room 11 can satisfy simultaneously single motor, the automatically controlled two unifications of motor, the trinity at most unification of electricity drive assembly, the NVH test of sound power and sound pressure level under the multiple mode such as commercial car large motor, simultaneously when carrying out above-mentioned NVH test, can guarantee that all dynamometers are outside at half anechoic room, background noise and indoor sound absorption effect are better.
The special-shaped inner house 1 is a special-shaped concrete inner house. The cross section of the special-shaped inner room 1 is of a concave structure, and a high-speed dynamometer room 9 is arranged at the lower concave part of the special-shaped inner room. And the high-speed dynamometer room 9 is communicated with the special-shaped inner room 1 through a through-wall hole formed in the special-shaped wall surface. The concave depth is adjustable, and the length of the high-speed transmission shaft is reduced to the maximum extent on the premise that the high-speed dynamometer is outside the semi-anechoic chamber, so that the running background noise is greatly reduced.
The special-shaped inner room 1 and the outer room 6 are separated by an air layer. The first low-speed power measuring machine room 10 and the second low-speed power measuring machine room 11 are communicated with the special-shaped inner room 1 through wall through holes formed in corresponding wall surfaces of the special-shaped inner room 1 and the outer room 6.
Interior room vibration isolation system 4 includes first iron bottom plate 7 and lays the first vibration isolation system 8 in first iron bottom plate 7 lower part. And a high-speed bench iron bottom plate 12 and a second vibration isolation system 15 paved on the lower part of the high-speed bench iron bottom plate 12 are arranged in the high-speed dynamometer room 9. A first low-speed iron bottom plate 13 and a third vibration isolation system 16 paved on the lower portion of the first low-speed iron bottom plate 13 are arranged in the first low-speed work measuring machine chamber 10. A second low-speed iron bottom plate 14 and a fourth vibration isolation system 17 paved on the lower part of the second low-speed iron bottom plate 14 are arranged in the second low-speed work measuring machine chamber 11. The test effect is further improved.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily think of various equivalent modifications or substitutions within the technical scope of the present invention, and these modifications or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
1. The utility model provides an acoustics experimental apparatus that is used for automobile-used driving assembly NVH of new forms of energy to test which characterized in that, the device includes:
a special-shaped inner room (1);
the sound absorption structure is attached to the inner side wall surface of the special-shaped inner room (1);
the inner room vibration isolation system (4) is arranged at the bottom of the special-shaped inner room (1);
the central traveling crane system (5) is arranged at the top of the special-shaped inner room (1);
an outer house (6) surrounding the outer side of the special-shaped inner house (1);
the high-speed dynamometer room (9) is positioned outside the special-shaped wall surface of the special-shaped inner room (1) and is communicated with the special-shaped inner room (1);
the first low-speed work measuring machine room (10) and the second low-speed work measuring machine room (11) are positioned on two outer sides of the non-special-shaped wall surface of the outer room (6) and are communicated with the special-shaped inner room (1).
2. The acoustic experimental device for NVH (noise vibration and harshness) test of the new energy vehicle powertrain according to claim 1, wherein the sound absorption structure comprises:
the flat sound absorption structure (2) is attached to the special-shaped wall surface on the inner side of the special-shaped inner room (1);
the ASA sound absorption structure (3) is attached to the inner non-special-shaped wall surface of the special-shaped inner room (1).
3. The acoustic experimental device for NVH (noise vibration and harshness) testing of the new energy vehicle power assembly is characterized in that the special-shaped inner room (1) is a special-shaped concrete inner room, the cross section of the special-shaped inner room is of a concave structure, and a high-speed dynamometer room (9) is arranged in a concave position of the special-shaped inner room.
4. The acoustic experimental device for NVH (noise vibration and harshness) testing of the power assembly for the new energy vehicle as claimed in claim 1 or 3, characterized in that the high-speed dynamometer room (9) is communicated with the special-shaped inner room (1) through a wall through hole formed in a special-shaped wall surface.
5. The acoustic experimental device for testing the NVH of the power assembly for the new energy vehicle is characterized in that the first low-speed power testing machine room (10) and the second low-speed power testing machine room (11) are communicated with the special-shaped inner room (1) through wall through holes formed in corresponding wall surfaces of the special-shaped inner room (1) and the outer room (6).
6. The acoustic experimental device for NVH (noise vibration and harshness) testing of the new energy vehicle power assembly is characterized in that the inner room vibration isolation system (4) comprises a first iron bottom plate (7) and a first vibration isolation system (8) laid on the lower portion of the first iron bottom plate (7).
7. The acoustic experimental device for NVH (noise vibration and harshness) testing of the powertrain for the new energy vehicle is characterized in that a high-speed bench iron base plate (12) and a second vibration isolation system (15) laid at the lower part of the high-speed bench iron base plate (12) are arranged in the high-speed dynamometer room (9).
8. The acoustic experimental device for NVH (noise vibration and harshness) testing of the power assembly for the new energy vehicle is characterized in that a first low-speed iron bottom plate (13) and a third vibration isolation system (16) laid below the first low-speed iron bottom plate (13) are arranged in the first low-speed power testing chamber (10).
9. The acoustic experimental device for NVH (noise vibration and harshness) testing of the power assembly for the new energy vehicle is characterized in that a second low-speed iron bottom plate (14) and a fourth vibration isolation system (17) laid on the lower portion of the second low-speed iron bottom plate (14) are arranged in the second low-speed work testing chamber (11).
10. The acoustic experimental device for NVH (New energy vehicle Power Assembly) test according to claim 1, wherein the special-shaped inner room (1) is separated from the outer room (6) through an air layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221683603.2U CN218035679U (en) | 2022-06-30 | 2022-06-30 | Acoustic experimental device for NVH (noise, vibration and harshness) test of power assembly for new energy vehicle |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221683603.2U CN218035679U (en) | 2022-06-30 | 2022-06-30 | Acoustic experimental device for NVH (noise, vibration and harshness) test of power assembly for new energy vehicle |
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| CN218035679U true CN218035679U (en) | 2022-12-13 |
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| CN202221683603.2U Active CN218035679U (en) | 2022-06-30 | 2022-06-30 | Acoustic experimental device for NVH (noise, vibration and harshness) test of power assembly for new energy vehicle |
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