Low-noise vehicle-mounted permanent magnet air compressor motor

Abstract

The utility model relates to the technical field of motors, and discloses a low-noise vehicle-mounted permanent magnet air compressor motor, which structurally comprises a motor silencing cover and a noise reduction casing. A silencing disc is arranged in the silencing cover, the silencing disc is of a labyrinth type partition plate structure formed by arranging a plurality of silencing partition plates and porous sound absorption partition plates in a staggered mode, and the motor air inlet channel is divided into zigzag paths; the beneficial effects of the utility model are that the labyrinth-type separator plate structure enables external air flow to impact the wall surface of the separator plate for multiple times so as to be reflected, thereby prolonging the sound wave propagation path, enabling sound wave energy to be attenuated gradually, preventing sound waves from directly reaching the interior of the motor or directly leaking, and realizing air inlet and noise reduction; the outer sound insulation layer integrally formed by the cold-roll steel sheet is high in density and rigidity, and can form a sound barrier to block electromagnetic noise and operation vibration noise in the motor and reduce noise conduction.

Description

Technical Field

[0001] This utility model relates to the field of motor technology, specifically to a low-noise vehicle-mounted permanent magnet air compressor motor. Background Technology

[0002] With the rapid development of new energy vehicles, the performance of vehicle-mounted air compressors, as core components of vehicle braking systems, air conditioning systems, and auxiliary air supply systems, directly affects the driving safety and comfort of vehicles.

[0003] As the power source for air compressors, vehicle-mounted permanent magnet air compressor motors have stringent requirements for noise levels due to the confined space and intense vibrations in vehicle environments. Existing vehicle-mounted permanent magnet air compressor motors generally suffer from excessive noise, making it difficult to meet the high-end demands of vehicle environments. Utility Model Content

[0004] The technical problem to be solved by this utility model is:

[0005] In view of the problems existing in the prior art, the purpose of this utility model is to provide a low-noise vehicle-mounted permanent magnet air compressor motor, which has the function of reducing noise of the vehicle-mounted permanent magnet air compressor motor.

[0006] To solve the above problems, the present invention adopts the following technical solution.

[0007] The low-noise vehicle-mounted permanent magnet air compressor motor includes a motor, a main shaft, a base, a soundproof cover, and a noise-reducing housing. The noise-reducing housing is installed on the outside of the motor, and the base is installed on the bottom of the noise-reducing housing. One end of the motor is connected to the soundproof cover by bolts, and the main shaft is installed on the end of the motor away from the soundproof cover. The main shaft is connected to the vehicle-mounted air compressor.

[0008] The muffler includes an air inlet and a muffler plate. The air inlet is provided on one side of the muffler, and the muffler plate is provided inside the muffler. The outer side of the muffler plate is connected to the inner wall of the muffler for installation and fixation.

[0009] The silencing plate includes a silencing baffle, a porous sound-absorbing baffle, and a silencing channel. The silencing plate is composed of several silencing baffles and porous sound-absorbing baffles spliced ​​together. Several of the silencing baffles and porous sound-absorbing baffles are spliced ​​together to form a circular labyrinth structure, and several silencing channels are reserved.

[0010] The noise reduction housing includes an outer sound insulation layer, an inner thermally conductive noise reduction layer, and a sound insulation layer. The outer sound insulation layer and the inner thermally conductive noise reduction layer are arranged sequentially from the outside to the inside on the inner wall of the noise reduction housing. A sound insulation layer is provided between the outer sound insulation layer and the inner thermally conductive noise reduction layer. The outer sound insulation layer, the inner thermally conductive noise reduction layer, and the noise reduction housing form a composite structure.

[0011] As a further improvement of this utility model, the motor includes a rotor, a stator and a permanent magnet. The stator and rotor are arranged sequentially from the outside to the inside of the motor, and the permanent magnet is mounted on the rotor.

[0012] As a further improvement of this utility model, the outer sound insulation layer is integrally formed from cold-rolled steel plate.

[0013] As a further improvement of this utility model, the inner wall of the inner thermally conductive noise reduction layer is coated with a damping noise reduction coating. With the help of the high internal loss characteristics of the damping material, it can absorb the mechanical energy transmitted by the internal stator and rotor vibration when the motor is running, and convert the vibration energy into heat energy for consumption.

[0014] As a further improvement of this utility model, the interior of the sound insulation layer is densely covered with arc-shaped sound insulation protrusions.

[0015] As a further improvement of this utility model, a heat dissipation plate is built into the inner wall of the inner thermally conductive and noise-reducing layer.

[0016] Compared with the prior art, the advantages of this utility model are:

[0017] (1) The low-noise vehicle-mounted permanent magnet air compressor motor of this utility model has a sound-absorbing disc inside the motor's sound-absorbing cover. With the help of a labyrinth-type partition structure formed by several sound-absorbing partitions and porous sound-absorbing partitions, the air intake channel of the motor can be divided into a tortuous path, so that the external airflow hits the partition wall multiple times and is reflected. Each reflection consumes sound wave energy, and at the same time, it can extend the sound wave propagation path, so that the energy gradually decays, avoiding direct access to the motor or direct leakage, thus playing a role in noise reduction.

[0018] (2) The low-noise vehicle-mounted permanent magnet air compressor motor of this utility model uses porous sound-absorbing material in the porous sound-absorbing baffle. When the external airflow passes through the channel, the sound wave can penetrate the material pores. The air molecules in the pores rub against the material fibers, which can further convert the sound energy into heat energy and consume it. This works synergistically with the reflection attenuation of the sound-absorbing baffle to improve the noise reduction effect on the motor.

[0019] (3) The low-noise vehicle-mounted permanent magnet air compressor motor of this utility model has an outer sound insulation layer on the inner wall of the noise reduction housing. It is made of cold-rolled steel plate in one piece. With the high density and strong rigidity of the steel plate, a "sound barrier" can be formed, which can block the electromagnetic noise and vibration noise generated inside the motor and reduce the transmission of noise.

[0020] (4) The low-noise vehicle-mounted permanent magnet air compressor motor of this utility model has an inner heat-conducting noise reduction layer on the inner wall of the noise reduction housing and a damping noise reduction coating on the inner wall. With the high internal loss characteristics of the damping material, it can absorb the mechanical energy transmitted by the internal stator and rotor vibration when the motor is running, and convert the vibration energy into heat energy for consumption. At the same time, it can suppress the vibration resonance of the housing itself, thereby reducing the transmission of vibration to the outer layer and weakening the generation and propagation of vibration noise from the source. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of the low-noise vehicle-mounted permanent magnet air compressor motor of this utility model;

[0022] Figure 2 This is a schematic diagram of the structure of the sound-absorbing cover of this utility model;

[0023] Figure 3 This is a schematic diagram of the structure of the sound-absorbing disc of this utility model;

[0024] Figure 4 This is a schematic diagram of the internal structure of the motor of this utility model;

[0025] Figure 5 This is a schematic diagram of the structure of the noise reduction housing of this utility model;

[0026] Figure 6 This is a schematic diagram of the internal structure of the sound insulation layer of this utility model;

[0027] Figure 7 This is a cross-sectional structural diagram of the internal thermally conductive noise reduction layer of this utility model.

[0028] The attached diagram is labeled as follows: Motor-1, Main shaft-2, Base-3, Silencing cover-4, Noise reduction housing-5, Air inlet-41, Silencing disc-42, Silencing baffle-421, Porous sound-absorbing baffle-422, Silencing channel-423, Stator-11, Rotor-12, Permanent magnet-13, Outer sound insulation layer-51, Inner heat-conducting and noise-reducing layer-52, Sound insulation layer-53, Arc-shaped sound insulation protrusion-531, Heat dissipation plate-521. Detailed Implementation

[0029] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0030] Example: Please refer to Figures 1-7The low-noise vehicle-mounted permanent magnet air compressor motor has a structure including a motor 1, a main shaft 2, a base 3, a soundproof cover 4, and a noise-reducing housing 5. The motor 1 is externally mounted with a noise-reducing housing 5, which can reduce the noise when the motor 1 is running. The base 3 is mounted on the bottom of the noise-reducing housing 5. One end of the motor 1 is connected to the soundproof cover 4 by bolts. The main shaft 2 is mounted on the end of the motor 1 away from the soundproof cover 4, and is connected to the vehicle-mounted air compressor through the main shaft 2.

[0031] In this embodiment, the muffler 4 includes an air inlet port 41 and a muffler disc 42. An air inlet port 41 is provided on one side end face of the muffler 4, and external gas can enter the motor 1 through the air inlet port 41. The muffler disc 42 is provided inside the muffler 4, and the outer side of the muffler disc 42 is connected to the inner wall of the muffler 4 for installation and fixation.

[0032] In this embodiment, the silencing disk 42 includes a silencing baffle 421, a porous sound-absorbing baffle 422, and a silencing channel 423. The silencing disk 42 is composed of several silencing baffles 421 and porous sound-absorbing baffles 422 spliced ​​together. Several silencing baffles 421 and porous sound-absorbing baffles 422 are spliced ​​together to form a circular labyrinth structure, and several silencing channels 423 are reserved. After the external gas enters, it will first pass through several silencing channels 423 and then enter the motor 1.

[0033] In this embodiment, the labyrinthine partition structure formed by the alternating arrangement of several sound-absorbing partitions 421 and porous sound-absorbing partitions 422 can divide the air intake channel of the motor 1 into a tortuous path. After the noise carried by the external airflow and the noise of the motor fan rotation enter, they will hit the partition wall multiple times and be reflected. Each reflection will consume sound wave energy, and at the same time, it can extend the sound wave propagation path, so that the energy gradually attenuates, preventing it from directly reaching the motor or directly leaking out, thus playing a role in noise reduction.

[0034] In this embodiment, through the porous sound-absorbing material used in the porous sound-absorbing baffle 422, when the external airflow passes through the channel, the sound waves can penetrate the material pores. The air molecules in the pores rub against the material fibers, which can further convert the sound energy into heat energy and consume it. This works synergistically with the reflection attenuation of the sound-absorbing baffle 421 to improve the noise reduction effect on the motor 1.

[0035] In this embodiment, the motor 1 includes a stator 11, a rotor 12 and a permanent magnet 13. The stator 11 and the rotor 12 are arranged sequentially from the outside to the inside of the motor 1. The permanent magnet 13 is installed on the rotor 12 and is covered by the noise reduction housing 5.

[0036] In this embodiment, the noise reduction housing 5 includes an outer sound insulation layer 51, an inner thermally conductive noise reduction layer 52, and a sound insulation layer 53. The outer sound insulation layer 51 and the inner thermally conductive noise reduction layer 52 are sequentially disposed on the inner wall of the noise reduction housing 5 from the outside to the inside. A sound insulation layer 53 is provided between the outer sound insulation layer 51 and the inner thermally conductive noise reduction layer 52. The outer sound insulation layer 51, the inner thermally conductive noise reduction layer 52, and the noise reduction housing 5 form a composite structure.

[0037] Working principle: When the vehicle-mounted permanent magnet air compressor is in use, external air is drawn in through the air inlet 41 on the silencer 4 at one end of the motor 1. When the external air enters, it first passes through the silencer disc 42. Through the staggered arrangement of several silencer baffles 421 and porous sound-absorbing baffles 422 on the silencer disc 42, the noise carried by the external airflow and the noise of the motor fan rotation can be reflected multiple times by impacting the baffle wall. Each reflection consumes sound wave energy and prolongs the sound wave propagation path, so that the energy gradually decreases, which plays a role in reducing noise for the motor 1.

[0038] Furthermore, the porous sound-absorbing material of the porous sound-absorbing partition 422 can rub against the external airflow, further converting sound energy into heat energy for consumption. This works synergistically with the reflection attenuation of the sound-absorbing partition 421 to enhance the noise reduction effect on the motor 1. It also works synergistically with the noise reduction housing 5 installed on the outside of the motor 1 for noise reduction.

[0039] Example 2: Please refer to Figures 4-7 Compared with Embodiment 1, the low-noise vehicle-mounted permanent magnet air compressor motor of this utility model further includes: the outer sound insulation layer 51 is integrally formed from cold-rolled steel plate. With the help of the high density and high rigidity of the steel plate, a "sound barrier" can be formed, thereby blocking the electromagnetic noise and operating vibration noise generated inside the motor 1 and reducing the transmission of noise.

[0040] In this embodiment, the inner wall of the inner thermally conductive noise reduction layer 52 is coated with a damping noise reduction coating. With the high internal loss characteristics of the damping material, it can absorb the mechanical energy transmitted by the vibration of the internal rotor 12 and stator 11 when the motor 1 is running, convert the vibration energy into heat energy for consumption, and at the same time suppress the vibration resonance of the casing itself, thereby reducing the transmission of vibration to the outer layer and weakening the generation and propagation of vibration noise from the source.

[0041] In this embodiment, the interior of the sound insulation layer 53 is densely covered with arc-shaped sound insulation protrusions 531, which can improve the sound wave reflection attenuation effect, thereby improving the noise reduction effect.

[0042] In this embodiment, a heat dissipation plate 521 is built into the inner wall of the inner heat-conducting and noise-reducing layer 52. The heat dissipation plate 521 can quickly and evenly distribute and conduct locally concentrated heat, which can prevent heat accumulation inside the motor 1 and avoid the situation where high temperature will aggravate vibration and noise under vehicle high temperature conditions.

[0043] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0044] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A low-noise vehicle-mounted permanent magnet air compressor motor, which comprises a motor (1), a noise reduction shell (5), a base (3), a muffler cover (4) and a main shaft (2); the noise reduction shell (5) is installed outside the motor (1), the base (3) is arranged at the bottom of the noise reduction shell (5), the muffler cover (4) is installed at one end of the motor (1), and the main shaft (2) is arranged at the other end of the motor (1) away from the muffler cover (4). characterized in that The muffler cover (4) comprises an air inlet port (41) and a muffler disc (42), an air inlet port (41) is formed on one side end face of the muffler cover (4), and a muffler disc (42) is arranged in the muffler cover (4); the outer side of the muffler disc (42) is connected with the inner wall of the muffler cover (4). The muffler disc (42) comprises a muffler baffle (421), a porous sound-absorbing baffle (422) and a muffler channel (423), the muffler disc (42) is formed by splicing a plurality of muffler baffles (421) and porous sound-absorbing baffles (422), a plurality of muffler baffles (421) and porous sound-absorbing baffles (422) are spliced to form a circular labyrinth structure, and a plurality of muffler channels (423) are reserved. The noise reduction shell (5) comprises an outer sound insulation layer (51), an inner heat-conducting noise reduction layer (52) and a sound insulation layer (53), the outer sound insulation layer (51) and the inner heat-conducting noise reduction layer (52) are arranged in sequence from the outside to the inside on the inner wall of the noise reduction shell (5), and the sound insulation layer (53) is arranged between the outer sound insulation layer (51) and the inner heat-conducting noise reduction layer (52).

2. The low noise in-vehicle permanent magnet air compressor motor of claim 1, wherein: The motor (1) comprises a stator (11), a rotor (12) and a permanent magnet (13), the stator (11) and the rotor (12) are arranged in sequence from the outside to the inside in the motor (1), and the permanent magnet (13) is installed on the rotor (12).

3. The low noise in-vehicle permanent magnet air compressor motor of claim 1, wherein: The outer sound insulation layer (51) is integrally formed by cold-rolled steel plate.

4. The low noise in-vehicle permanent magnet air compressor motor of claim 1, wherein: The inner wall of the inner heat-conducting noise reduction layer (52) is coated with a damping noise reduction coating.

5. The low noise in-vehicle permanent magnet air compressor motor of claim 1, wherein: The inner wall of the inner heat-conducting noise reduction layer (52) is coated with a damping noise reduction coating.

6. The low noise in-vehicle permanent magnet air compressor motor of claim 1, wherein: The inner wall of the inner heat-conducting noise reduction layer (52) is coated with a damping noise reduction coating. The inner wall of the inner heat-conducting noise reduction layer (52) is coated with a damping noise reduction coating.

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