Centrifugal air compressor

Abstract

The utility model relates to the technical field of air compression, in particular to a centrifugal air compressor. In order to improve the noise reduction effect of a gear speed increasing type centrifugal air compressor and reduce the disassembly, assembly and maintenance difficulty of an emptying silencer, the utility model provides a centrifugal air compressor which comprises a motor, an oil tank and the emptying silencer, the motor and the emptying silencer are located at the top of the oil tank, and the emptying silencer is located at the bottom of the oil tank. The emptying silencer is clamped between the motor and the oil tank, and an air inlet of the emptying silencer is communicated with an emptying exhaust pipe. Therefore, in the centrifugal air compressor, the emptying silencer is positioned between the motor and the oil tank, the mounting height of the emptying silencer can be effectively reduced, the emptying silencer is convenient to disassemble, assemble and maintain, and the structural stability of the emptying silencer can be improved by virtue of the gravity action of the motor, so that vibration noise caused by vibration of the emptying silencer can be avoided, and the service life of the emptying silencer is prolonged. Therefore, the noise of the centrifugal air compressor can be reduced, and the noise reduction effect of the centrifugal air compressor is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to air compression technical field especially relates to a centrifugal air compressor. BACKGROUND

[0002] In recent years, people pay more and more attention to the harm of noise. The gear speed increasing type centrifugal air compressor is widely used in petroleum, chemical industry, automobile, machinery, aviation, sewage treatment, electronics, mining ventilation and other fields. As a high-speed rotating large displacement air compression machinery, it is accompanied by strong noise during operation, and the noise during anti-surge venting can even reach more than 100dB, causing serious noise pollution to the surrounding environment.

[0003] In addition, the gear speed increasing type centrifugal air compressor on the market at present mostly uses cylindrical silencer as venting silencer, and the venting silencer is installed at the highest position of the unit. In this way, using cylindrical silencer as venting silencer of gear speed increasing type centrifugal air compressor has large volume, heavy weight and high installation position, which not only is inconvenient to disassemble and maintain, but also leads to unsatisfactory silencing effect due to high position. UTILITY MODEL CONTENT

[0004] In order to improve the silencing effect of the gear speed increasing type centrifugal air compressor and reduce the disassembly and maintenance difficulty of the venting silencer, the utility model provides a centrifugal air compressor, which comprises a motor, an oil tank and a venting silencer. The motor and the venting silencer are located at the top of the oil tank, the venting silencer is clamped between the motor and the oil tank, and the air inlet of the venting silencer is communicated with the venting exhaust pipe. In this way, in the centrifugal air compressor of the utility model, the venting silencer is located between the motor and the oil tank, which can effectively reduce the installation height of the venting silencer, facilitate disassembly and maintenance, and improve the structural stability of the venting silencer by relying on the gravity of the motor, so as to avoid vibration noise caused by vibration of the venting silencer, thereby reducing the noise of the centrifugal air compressor of the utility model and improving the silencing effect of the centrifugal air compressor of the utility model. In addition, in the centrifugal air compressor of the utility model, the venting silencer is arranged in the vacant position between the motor and the oil tank, that is, it does not occupy the whole machine space and does not affect the whole machine volume of the centrifugal air compressor of the utility model.

[0005] Preferably, a plurality of parallel sound-absorbing plates are arranged in the venting silencer, each of the sound-absorbing plates is provided with a plurality of sound-absorbing holes, and the total area of the sound-absorbing holes on different sound-absorbing plates gradually decreases along the airflow direction. In this way, a plurality of parallel sound-absorbing plates are arranged in the venting silencer to divide the inner cavity of the venting silencer into a plurality of sound-absorbing cavities; the airflow sequentially passes through the sound-absorbing holes with gradually decreasing total area from entering the venting silencer to flowing out of the venting silencer, and the sound-absorbing holes can be used to divide the airflow to reduce noise, thereby improving the silencing effect of the centrifugal air compressor. Further, the sound-absorbing holes are uniformly distributed on the sound-absorbing plates. In this way, the effect of dividing the airflow by the sound-absorbing holes can be improved, thereby improving the noise reduction effect of the venting silencer, and further improving the silencing effect of the centrifugal air compressor.

[0006] Preferably, a plurality of copper silencers are arranged at the exhaust end of the venting silencer. In this way, a plurality of standard pneumatic copper silencers are arranged at the exhaust end of the venting silencer, i.e., the final exhaust port of the centrifugal air compressor, which not only improves the silencing effect of the centrifugal air compressor by improving the noise reduction effect of the venting silencer, but also reduces the manufacturing cost of the centrifugal air compressor due to the low price of the copper silencers. Further, the exhaust end of the venting silencer is provided with a sound-absorbing dust cover, and the sound-absorbing dust cover covers the copper silencers. In this way, the sound-absorbing dust cover is arranged to cover the copper silencers, which can avoid the influence of dust accumulation on the copper silencers, thereby affecting the silencing effect of the centrifugal air compressor.

[0007] Preferably, the venting silencer is a square silencer. In this way, the square silencer is used as the venting silencer arranged between the motor and the oil tank, which has a simple structure and is convenient to install in the empty position between the motor and the oil tank, and does not interfere with other components in the centrifugal air compressor. Further, the bottom plate of the venting silencer is shared with the top cover of the oil tank. In this way, the structure of the centrifugal air compressor can be simplified, and the manufacturing cost of the centrifugal air compressor can be reduced. BRIEF DESCRIPTION OF DRAWINGS

[0008] Fig. 1 is a front view structural schematic diagram of the centrifugal air compressor of the utility model;

[0009] Fig. 2 is a perspective structural schematic diagram of the centrifugal air compressor of the utility model;

[0010] Fig. 3 is a top view structural schematic diagram of the centrifugal air compressor of the utility model;

[0011] Fig. 4 is Fig. 3 is an axonometric view of the A-A sectional structure in DETAILED DESCRIPTION

[0012] Below, in conjunction with Figs. 1 to 4 This invention provides a detailed description of the centrifugal air compressor.

[0013] like Figs. 1 to 4 As shown, the centrifugal air compressor of this invention includes a motor 1, an oil tank 2, and a venting silencer 3. The motor 1 and the venting silencer 3 are located on top of the oil tank 2, with the venting silencer 3 sandwiched between the motor 1 and the oil tank 2. The air inlet of the venting silencer 3 is connected to the venting exhaust pipe 4. Thus, in this centrifugal air compressor, the venting silencer 3 is located between the motor 1 and the oil tank 2, effectively reducing the installation height of the venting silencer 3, facilitating disassembly and maintenance. Furthermore, the structural stability of the venting silencer 3 can be improved by relying on the gravity of the motor 1, thereby preventing vibration noise caused by the venting silencer 3, and thus reducing the noise of the centrifugal air compressor and improving its noise reduction effect. In addition, in this centrifugal air compressor, the venting silencer 3 is placed in an empty position between the motor 1 and the oil tank 2, meaning it does not occupy the overall space of the machine and does not affect the overall size of the centrifugal air compressor.

[0014] like Figs. 1 to 4As shown, multiple parallel sound-absorbing plates 31 are arranged in the venting silencer 3, and multiple sound-absorbing holes 311 are arranged on each sound-absorbing plate 31, and the hole areas of the sound-absorbing holes 311 on different sound-absorbing plates 31 gradually decrease along the airflow direction. In this way, multiple parallel sound-absorbing plates 31 are arranged in the venting silencer 3 to divide the inner cavity of the venting silencer 3 into multiple stages of sound-absorbing cavities 32; the airflow sequentially passes through the sound-absorbing holes 311 with gradually decreasing hole areas from entering the venting silencer 3 to flowing out of the venting silencer 3, and the sound-absorbing holes 311 can be used to divide the airflow to reduce noise, thereby improving the silencing effect of the centrifugal air compressor of the utility model. Preferably, the sound-absorbing holes 311 are uniformly distributed on the sound-absorbing plates 31. In this way, the effect of the sound-absorbing holes dividing the airflow can be improved, thereby improving the noise reduction effect of the venting silencer 3, and further improving the silencing effect of the centrifugal air compressor of the utility model. In the implementation of the centrifugal air compressor of the utility model, three sound-absorbing plates 31, i.e., a first sound-absorbing plate, a second sound-absorbing plate, and a third sound-absorbing plate, can be arranged in the venting silencer 3 to divide the inner cavity of the venting silencer 1 into four sound-absorbing cavities 32 of different levels, the first sound-absorbing plate is close to the air inlet of the venting silencer 3, the third sound-absorbing plate is close to the air outlet end of the venting silencer 3, the second sound-absorbing plate is between the first sound-absorbing plate and the third sound-absorbing plate, and the first sound-absorbing holes on the first sound-absorbing plate have the largest hole area, and the third sound-absorbing holes on the third sound-absorbing plate have the smallest hole area. Preferably, the first sound-absorbing plate, the second sound-absorbing plate, and the third sound-absorbing plate are arranged at equal intervals in the venting silencer 3 to form four sound-absorbing cavities 32 with the same volume. Preferably, the first sound-absorbing holes, the second sound-absorbing holes, and the third sound-absorbing holes are all circular holes, which are simple in structure and convenient to punch. Preferably, multiple copper silencers 5 are arranged at the air outlet end of the venting silencer 3. In this way, multiple standard pneumatic copper silencers 5 are arranged at the air outlet end of the venting silencer 3, i.e., the final air outlet of the centrifugal air compressor of the utility model, which not only improves the silencing effect of the centrifugal air compressor of the utility model by improving the noise reduction effect of the venting silencer 3, but also reduces the manufacturing cost of the centrifugal air compressor of the utility model due to the low price of the copper silencers 5. Preferably, the air outlet end of the venting silencer 3 is provided with a sound-absorbing dust cover 33, and the sound-absorbing dust cover 33 covers the copper silencers 5. In this way, the sound-absorbing dust cover 33 is arranged to cover the copper silencers 5, which can avoid the influence of dust accumulation on the copper silencers 5, thereby affecting the silencing effect of the centrifugal air compressor of the utility model.

[0015] As Figs. 1 to 4As shown, the venting silencer 3 is a square silencer. In this way, the square silencer formed by the side plate, the bottom plate and the top plate is arranged between the motor 1 and the oil tank 2 as the venting silencer 3, which is simple in structure, convenient to install in the empty position between the motor 1 and the oil tank 2, and does not interfere with other components in the centrifugal air compressor. Preferably, the bottom plate of the venting silencer 3 is shared with the top cover of the oil tank 2. That is, when the venting silencer 3 is arranged, the top cover 21 of the oil tank 2 can be directly used as the bottom plate of the venting silencer 3. In this way, the structure of the centrifugal air compressor of the utility model can be simplified, and the manufacturing cost of the centrifugal air compressor of the utility model can be reduced.

Claims

1. A centrifugal air compressor characterized by, The centrifugal air compressor comprises a motor, an oil tank and a venting silencer, the motor and the venting silencer are located at the top of the oil tank, the venting silencer is clamped between the motor and the oil tank, and the air inlet of the venting silencer is communicated with the venting exhaust pipe.

2. The centrifugal air compressor of claim 1, wherein, A plurality of parallel sound-absorbing plates are arranged in the venting silencer, a plurality of sound-absorbing holes are arranged on each sound-absorbing plate, and the hole area of the sound-absorbing holes on different sound-absorbing plates gradually decreases along the airflow direction.

3. The centrifugal air compressor of claim 2, wherein, The sound-absorbing holes are uniformly distributed on the sound-absorbing plates.

4. The centrifugal air compressor of claim 2 or 3, wherein A plurality of copper silencers are arranged at the exhaust end of the venting silencer.

5. The centrifugal air compressor of claim 4, wherein, A sound-absorbing dust cover is arranged at the exhaust end of the venting silencer, and the sound-absorbing dust cover covers the copper silencers.

6. The centrifugal air compressor of claim 5, wherein, The venting silencer is a square silencer.

7. The centrifugal air compressor of claim 6, wherein, The bottom plate of the venting silencer is shared with the top cover of the oil tank.

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