Motor noise reduction test bench for new energy automobile

Abstract

The utility model particularly relates to a motor noise reduction test bench for a new energy automobile, which comprises a base, a bearing seat is arranged on the base, a coupler is arranged in the bearing seat, one outward side of the bearing seat is a through-wall cantilever cylinder mounting surface, a through-wall cantilever cylinder is arranged on the through-wall cantilever cylinder mounting surface, and the through-wall cantilever cylinder is arranged on the bearing seat. The outward side of the through-wall cantilever cylinder is a tested motor mounting surface, a tested motor is mounted on the tested motor mounting surface, and a motor shaft of the tested motor is connected with one end of a coupler; two walls are mounted on the mounting surface of the through-wall cantilever cylinder and the mounting surface of the tested motor, and the through-wall cantilever cylinder penetrates through the two walls and extends into the anechoic chamber; according to the motor noise reduction test bench for the new energy automobile, the tested motor is isolated by two walls and is installed in the closed noise reduction chamber for testing, so that various data obtained in the testing process are more accurate and reliable, and the testing accuracy is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to motor testing device technical field, concretely is a kind of motor sound attenuation test bench for new energy vehicle. BACKGROUND

[0002] With the continuous expansion of new energy vehicle market, the demand for motor test bench is also increasing. Motor test bench is mainly used for comprehensive, systematic performance evaluation of electric motor, simulates various working conditions and operating scenarios, verifies the performance, efficiency, reliability and safety of motor under various conditions. In addition, motor test bench is also applied to the development of new energy vehicle powertrain, including type test, endurance test, electric control system test, performance optimization, etc.

[0003] In the prior art, most test benches expose the motor when testing the motor placed on the test bench. In the test of new energy vehicle motor, the application of sound attenuation chamber is particularly important. The motor generates noise when running, which may affect the accuracy of the test. By testing in the sound attenuation chamber, more accurate and reliable data can be obtained, providing a scientific basis for acoustic optimization of the motor. The sound attenuation chamber is not only an acoustic test laboratory, but also an important part of the test system, and its acoustic performance directly affects the accuracy of the test. Therefore, when testing high-speed motor, the high-speed motor needs to be placed in the sound attenuation chamber for isolation. UTILITY MODEL CONTENT

[0004] (I) Technical problem solved

[0005] In view of the deficiencies of the prior art, the utility model provides a motor sound attenuation test bench for new energy vehicle. Since the measured motor is isolated by two walls and installed in a closed sound attenuation chamber for testing, the data obtained during the test is more accurate and reliable, improving the accuracy of the test and solving the technical problem of inaccurate test data caused by exposure of the motor in the prior art.

[0006] (II) Technical scheme

[0007] To achieve the above-mentioned purpose, the utility model provides the following technical scheme: a motor sound attenuation test bench for new energy vehicle, comprising a base, a bearing seat is installed on the base, a shaft coupling is installed in the bearing seat, the outer side of the bearing seat is a wall-penetrating cantilever cylinder mounting surface, a wall-penetrating cantilever cylinder is installed on the wall-penetrating cantilever cylinder mounting surface, the outer side of the wall-penetrating cantilever cylinder is a measured motor mounting surface, a measured motor is installed on the measured motor mounting surface, and the motor shaft of the measured motor is connected with one end of the shaft coupling; two walls are installed on the wall-penetrating cantilever cylinder mounting surface and the measured motor mounting surface, and the wall-penetrating cantilever cylinder penetrates through the two walls and extends into the sound attenuation chamber.

[0008] Further, the base is integrally casted by cast iron, four groups of ground foot mounting grooves are symmetrically arranged on the bottom of the base, and expansion bolts are arranged in the four groups of ground foot mounting grooves to fix the base to the ground.

[0009] Further, seven parallel sliding grooves are arranged on the mounting surface of the base.

[0010] Further, the bearing seat is fastened to the base by bolts, and the dynamometer and the torque sensor are arranged on the inward side of the bearing seat through the shaft coupling.

[0011] Further, a sealing ring is arranged on the contact between the wall-penetrating cantilever cylinder and the wall-penetrating cantilever cylinder mounting surface and the motor mounting surface.

[0012] (Three) beneficial effects

[0013] Compared with the prior art, the utility model provides a motor sound attenuation test bench for new energy vehicles, which has the following beneficial effects:

[0014] By placing the measured motor in the sound attenuation chamber, the motor shaft is fixedly connected with the shaft coupling, the mounting surface of the measured motor is fixedly connected with the motor mounting surface on the wall-penetrating cantilever cylinder, the shaft coupling is arranged in the bearing seat, the dynamometer and the torque sensor are arranged on the inward side of the bearing seat through the shaft coupling, the dynamometer and the torque sensor are protected, the measured motor is prevented from damaging the dynamometer and the torque sensor, the measured motor shaft can be accurately centered, the base is integrally casted by cast iron, the base is fixed to the ground through the expansion bolts in the ground foot mounting grooves, the mechanical strength of the whole test bench is improved, after the measured motor and the dynamometer are installed, the measured motor can be started, the required performance indicators of the measured motor can be tested, the measured motor is installed in the closed sound attenuation chamber through the two walls, the data obtained in the test process is more accurate and reliable, and the test accuracy is improved. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is a perspective view of the utility model for a motor sound attenuation test bench for new energy vehicles;

[0016] Figure 2 It is Figure 1 It is a perspective view from another angle;

[0017] Figure 3 It is Figure 1 It is a left view;

[0018] Figure 4 It is Figure 1 It is a right view;

[0019] In the figure: 1, base; 101, foot mounting slot; 102, sliding slot; 2, bearing seat; 3, shaft coupling; 4, wall-penetrating cantilever cylinder mounting surface; 5, wall-penetrating cantilever cylinder; 6, measured motor mounting surface. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the utility model will be apparently and completely described in connection with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all the other embodiments obtained by the ordinary skilled in the art without creative labor belong to the protection scope of the utility model.

[0021] Please refer to Figures 1-4 A motor sound attenuation test bench for new energy vehicles, comprising a base 1, the base 1 is integrally cast by cast iron, the bottom of the base 1 is symmetrically provided with four groups of foot mounting slots 101 on both sides, expansion bolts are arranged in the four groups of foot mounting slots 101 to fix the base 1 to the ground, seven parallel sliding slots 102 are centrally arranged on the mounting surface of the base 1, a bearing seat 2 is mounted on the base 1, a shaft coupling 3 is mounted in the bearing seat 2, the bearing seat 2 is fastened to the base 1 by a plurality of bolts, a dynamometer and a torque sensor are connected to the inner side of the bearing seat 2 through the shaft coupling 3, the outer side of the bearing seat 2 is a wall-penetrating cantilever cylinder mounting surface 4, a wall-penetrating cantilever cylinder 5 is mounted on the wall-penetrating cantilever cylinder mounting surface 4, the outer side of the wall-penetrating cantilever cylinder 5 is a measured motor mounting surface 6, a measured motor is mounted on the measured motor mounting surface 6, and the motor shaft of the measured motor is connected to one end of the shaft coupling 3; two walls are mounted on the wall-penetrating cantilever cylinder mounting surface 4 and the measured motor mounting surface 6, the wall-penetrating cantilever cylinder 5 penetrates the two walls and extends into a sound attenuation chamber, and a sealing ring is mounted at the contact position between the wall-penetrating cantilever cylinder 5 and the wall-penetrating cantilever cylinder mounting surface 4 and the measured motor mounting surface 6.

[0022] The working principle of the above-mentioned embodiments is as follows:

[0023] In use, the measured motor is placed in the soundproof room, the motor shaft is fixedly connected with the coupling 3, the mounting surface of the measured motor is fixedly connected with the measured motor mounting surface 6 on the through-wall cantilever cylinder 5, the coupling 3 is installed in the bearing seat 2, the inward side of the bearing seat 2 is connected with the dynamometer and the torque sensor through the coupling 3, which plays a role of protecting the dynamometer and the torque sensor, preventing the measured motor from damaging the dynamometer and the torque sensor out of control, and enabling the measured motor shaft to be centered with high precision, the base 1 is integrally cast by cast iron, the base 1 is fixedly installed on the ground through the expansion bolts in the foot mounting groove 101, the mechanical strength of the whole rack is improved, after the measured motor and the dynamometer are installed, the measured motor can be started, and various required performance indicators of the measured motor are tested, since the measured motor is installed in the closed soundproof room through the two walls for isolation, the data obtained in the test process is more accurate and reliable, and the test accuracy is improved.

[0024] It should be noted that if in this paper, such as the relationship terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between the entities or operations. Moreover, the term "includes", "contains" or any other variant thereof is intended to cover non-exclusive inclusion, so that the process, method, article or equipment including a series of elements not only includes those elements, but also includes other elements not explicitly listed or inherent to such process, method, article or equipment. Without more limitations, the element defined by the statement "includes a" does not exclude the presence of another identical element in the process, method, article or equipment including the element.

[0025] Although the embodiments of the present application have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to the embodiments without departing from the principles and spirits of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A motor sound attenuation test bench for new energy vehicles, comprising a base (1), characterized in that: The base (1) is provided with a bearing seat (2) mounted thereon, the bearing seat (2) is provided with a shaft coupling (3) mounted therein, the bearing seat (2) is provided with a wall-penetrating cantilever cylinder mounting surface (4) on the outward side thereof, the wall-penetrating cantilever cylinder mounting surface (4) is provided with a wall-penetrating cantilever cylinder (5) mounted thereon, the wall-penetrating cantilever cylinder (5) is provided with a measured motor mounting surface (6) on the outward side thereof, a measured motor is mounted on the measured motor mounting surface (6), and a motor shaft of the measured motor is connected with one end of the shaft coupling (3). A two-face wall is mounted on the wall-penetrating cantilever cylinder mounting surface (4) and the measured motor mounting surface (6), and the wall-penetrating cantilever cylinder (5) extends into a sound attenuation chamber through the two-face wall. 2.The motor sound attenuation test bench for new energy vehicles of claim 1, wherein: The base (1) is integrally cast by cast iron, and four groups of foundation mounting grooves (101) are symmetrically arranged on the two sides of the bottom of the base (1), and the four groups of foundation mounting grooves (101) are provided with expansion bolts for fixing the base (1) to the ground. 3.The motor sound attenuation test bench for new energy vehicles of claim 1, wherein: Seven mutually parallel sliding grooves (102) are centrally arranged on the mounting surface of the base (1).

4. The motor sound attenuation test bench for new energy vehicles according to claim 1, characterized in that: The bearing seat (2) is fastened to the base (1) by a plurality of bolts, and the inward side of the bearing seat (2) is connected with a dynamometer and a torque sensor through the shaft coupling (3). 5.The motor sound attenuation test bench for new energy vehicles of claim 1, wherein: A sealing ring is mounted at the contact position of the wall-penetrating cantilever cylinder (5) with the wall-penetrating cantilever cylinder mounting surface (4) and the measured motor mounting surface (6).

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