Low-noise permanent magnet screw air compressor

Abstract

The utility model provides a low-noise permanent magnet screw air compressor. The low-noise permanent magnet screw air compressor comprises a frame, a sound insulation door plate and an air compressor structure, the frame is used for containing the air compressor structure, the sound insulation door plate is arranged on the frame to form a cabinet body, silencing cotton is attached to the inner wall of the frame, and the sound insulation door plate and the frame are sealed through a rubber sealing strip; an oil drum and a pipeline of the air compressor structure are respectively coated with rubber sound insulation cotton, and an air inlet of a screw machine head of the air compressor structure is provided with an air inlet noise reduction pipe; an air inlet is formed in the sound insulation door plate, and an air inlet noise reduction structure is arranged at the air inlet; the motor of the air compressor structure is a permanent magnet motor. Noise reduction is carried out on the screw air compressor in all aspects, and the overall noise reduction effect is better.

Description

Technical Field

[0001] The utility model relates to a low-noise permanent-magnet screw air compressor. Background Art

[0002] Screw air compressor is a key equipment widely used in industrial production, with the characteristics of high efficiency, stability and continuous air supply. However, in actual use, the noise problem of screw air compressor often troubles users. Noise not only affects the comfort of the working environment, but may also have an adverse effect on the health of operators. Screw air compressor compresses air through a pair of intermeshing screw rotors. During the rotation of the screw rotor, air is sucked in and compressed along the spiral tooth grooves, and finally discharged through the exhaust port. Since the meshing gap between the screw rotors is very small, the compression process of the air compressor is relatively smooth, so the noise is relatively low. However, in actual applications, due to various reasons, the noise problem of screw air compressors is still relatively prominent.

[0003] The noise of screw air compressors mainly comes from the following aspects: the rotation of the screw rotor, the operation of the bearings, and the movement of other mechanical parts will generate noise. Most of these noises are caused by mechanical vibration and friction. During the air intake, compression and discharge process, the high-speed movement and turbulence of the air flow will generate significant noise. Screw air compressors are usually driven by electric motors, and the operation of the motors will also generate noise, especially when the motor fails or runs unstably. The various components of the air compressor may resonate at specific frequencies, and the resonance will amplify the noise of certain frequencies, resulting in a significant increase in the overall noise level. Utility Model Content

[0004] The purpose of the utility model is to overcome the deficiencies in the prior art and provide a low-noise permanent magnet screw air compressor.

[0005] In order to solve the above technical problems, the utility model provides a low-noise permanent magnet screw air compressor, comprising a frame, a soundproof door panel and an air compressor structure; the frame is used to accommodate the air compressor structure, the soundproof door panel is arranged on the frame to form a cabinet, the inner wall of the frame is affixed with sound-absorbing cotton, and the soundproof door panel and the frame are sealed by a rubber sealing strip; the oil drum and the pipeline of the air compressor structure are respectively coated with rubber sound-absorbing cotton, and the air inlet of the screw head of the air compressor structure is provided with an air inlet noise reduction pipe; the soundproof door panel is provided with an air inlet, and the air inlet is provided with an air inlet noise reduction structure; the motor of the air compressor structure is a permanent magnet motor.

[0006] In a more preferred embodiment, a plurality of the soundproof door panels are included, and the soundproof door panels are disposed on the frame. The soundproof door panels are tightly connected to the frame via the rubber sealing strip.

[0007] In a more preferred embodiment, the soundproof door panel includes a first steel plate layer, a glass wool layer, a second steel plate layer, a sound-absorbing wool layer and a perforated plate layer attached in sequence.

[0008] In a more preferred embodiment, the oil drum and the pipe of the air compressor structure are respectively covered with rubber sound insulation cotton with a thickness of at least 10 mm.

[0009] In a more preferred embodiment, a plurality of baffles are provided inside the air inlet noise reduction structure, and sound-absorbing cotton is provided on the baffles to prevent sound from emanating from the air inlet.

[0010] Compared with the prior art, the technical solution of the utility model has the following beneficial effects:

[0011] The frame is used to accommodate the air compressor structure, the soundproof door panel is arranged on the frame to form a cabinet, the inner wall of the frame is affixed with sound-absorbing cotton, and the soundproof door panel and the frame are sealed by a rubber sealing strip; the oil drum and the pipeline of the air compressor structure are respectively coated with rubber sound-absorbing cotton, and the air inlet of the screw head of the air compressor structure is provided with an air inlet noise reduction pipe; the soundproof door panel is provided with an air inlet, and the air inlet is provided with an air inlet noise reduction structure; the motor of the air compressor structure is a permanent magnet motor. The noise of the screw air compressor is reduced in all aspects, and the overall noise reduction effect is better. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a three-dimensional schematic diagram of a permanent magnet screw air compressor in a preferred embodiment of the utility model;

[0013] Figure 2 This is a three-dimensional schematic diagram of a permanent magnet screw air compressor in a preferred embodiment of the utility model after removing the sound insulation door panel;

[0014] Figure 3 This is a schematic diagram of a screw head and an air intake noise reduction pipe in a preferred embodiment of the utility model;

[0015] Figure 4 It is a schematic diagram of an oil drum and a pipeline in a preferred embodiment of the utility model. DETAILED DESCRIPTION

[0016] The present invention is further described below in conjunction with the accompanying drawings and specific implementation methods.

[0017] See also Figure 1-Figure 4 A low-noise permanent magnet screw air compressor comprises a frame 1, a sound insulation door panel 2 and an air compressor structure 3.

[0018] The frame 1 is a square frame 1, and the frame 1 forms a space for accommodating the air compressor structure 3. The air compressor mechanism is arranged in the frame 1, and the soundproof door panel 2 is arranged on the frame 1 to form a cabinet. There are multiple soundproof door panels 2, which are laid on each surface of the square frame 1 to close the frame 1. The soundproof door panel 2 is made of a sound-absorbing panel. The inner wall of the frame 1 is affixed with sound-absorbing cotton, and the soundproof door panel 2 and the frame 1 are sealed by a rubber sealing strip. Therefore, the soundproof door panel 2 and the frame 1 can absorb the vibration energy of the sound to achieve the purpose of silencing.

[0019] When the air compressor structure 3 is in operation, the oil barrel 32 and the pipe 33 will vibrate, and the vibration is the cause of the sound. In the present utility model, the oil barrel 32 and the pipe 33 of the air compressor structure 3 are respectively coated with rubber sound insulation cotton, so as to absorb and isolate the noise generated by the oil barrel 32 during oil and gas separation. In this embodiment, the oil barrel 32 and the pipe 33 of the air compressor structure 3 are respectively coated with rubber sound insulation cotton at least 10 mm thick.

[0020] The source of the noise generated by the air compressor structure 3 during operation is the screw head 31 , so installing an air intake noise reduction pipe 4 at the air inlet position of the screw head 31 can effectively reduce the spread of noise.

[0021] When the air compressor structure 3 is in operation, cold air is needed to take away the heat generated by the air compressor structure 3 during operation and the heat emitted from the surface of the components. Therefore, it is necessary to open an air inlet 21 in the soundproof door panel 2 so that cold air can circulate inside the air compressor. Opening the air inlet 21 will cause noise to be emitted from this position. Therefore, the air inlet 21 is provided with an air inlet noise reduction structure 22, and a plurality of baffles are arranged inside the structure. Sound-absorbing cotton is installed on the baffles to effectively prevent sound from being emitted from the air inlet.

[0022] Screw air compressors are usually driven by electric motors, and the operation of the electric motors also generates noise. In the present invention, the electric motor of the air compressor structure 3 is a permanent magnet motor, which has the characteristic of low noise. Therefore, the permanent magnet screw air compressor has a low noise level.

[0023] The structure of the utility model can reduce the noise of the screw air compressor, thereby reducing the impact of noise on the social environment. For industrial enterprises that need to use air compressors and have high requirements for noise emissions, there is no need to take measures such as silent rooms / soundproof rooms to reduce noise. It can reduce the initial investment costs of industrial enterprises.

[0024] The above is only a preferred specific implementation method of the utility model, but the design concept of the utility model is not limited to this. Any technician familiar with the technical field who uses this concept to make non-substantial changes to the utility model within the technical scope disclosed by the utility model shall be deemed to infringe the protection scope of the utility model.

Claims

1. A low-noise permanent magnet screw air compressor, characterized in that: It includes a frame, a soundproof door panel and an air compressor structure; the frame is used to accommodate the air compressor structure, the soundproof door panel is arranged on the frame to form a cabinet, the inner wall of the frame is affixed with sound-absorbing cotton, and the soundproof door panel and the frame are sealed by a rubber sealing strip; the oil drum and the pipeline of the air compressor structure are respectively coated with rubber sound-absorbing cotton, and the air inlet of the screw head of the air compressor structure is provided with an air inlet noise reduction pipe; the soundproof door panel is provided with an air inlet, and the air inlet is provided with an air inlet noise reduction structure; the motor of the air compressor structure is a permanent magnet motor.

2. A low-noise permanent magnet screw air compressor as claimed in claim 1, characterized in that: It comprises a plurality of the soundproof door panels, which are arranged on the frame, and the soundproof door panels are tightly connected to the frame through the rubber sealing strip.

3. A low-noise permanent magnet screw air compressor as claimed in claim 2, characterized in that: The soundproof door panel comprises a first steel plate layer, a glass wool layer, a second steel plate layer, a sound-absorbing wool layer and a perforated plate layer which are attached in sequence.

4. A low-noise permanent magnet screw air compressor as claimed in claim 1, characterized in that: The oil drum and pipeline of the air compressor structure are respectively covered with rubber sound insulation cotton with a thickness of at least 10 mm.

5. A low-noise permanent magnet screw air compressor as claimed in claim 1, characterized in that: A plurality of baffles are arranged inside the air inlet noise reduction structure, and sound-absorbing cotton is arranged on the baffles to prevent sound from emanating from the air inlet.

Images