A water pump noise reduction device

Abstract

The application discloses a water pump noise reduction device, which comprises a water pump shell, a water cavity and a water outlet are arranged in the water pump shell, a sound attenuation cavity is arranged in the water cavity and is communicated with the water outlet, a sound attenuation block is arranged in the sound attenuation cavity, a communication cavity is arranged in the sound attenuation block and is communicated with the water cavity and the water outlet, and a plurality of sound attenuation holes are arranged on the sound attenuation block and are communicated with the sound attenuation cavity and the communication cavity. When the water pump works, the water in the water cavity is mixed with noise energy under the action of high pressure. After the water in the water cavity enters the communication cavity, part of the water goes out from the water outlet through the communication cavity, and the other part of the water is shunted into the sound attenuation cavity through the plurality of sound attenuation holes, so that the noise energy is shunted. The noise occurs emission and interference in the sound attenuation cavity, is fully reflected in the sound attenuation cavity, crosses each other, consumes energy, attenuates the noise energy, and reduces the noise.

Description

TECHNICAL FIELD

[0001] The present application relates to a water pump noise reduction device. BACKGROUND

[0002] Water pump (vane type water pump, volumetric water pump, electromagnetic pump, etc.) is a kind of equipment for conveying liquid or increasing pressure of liquid, all in working time liquid is sucked, mechanical energy or other external energy of prime mover is transmitted to liquid, so that liquid energy increases, then is discharged to convey liquid, for example, vane type water pump generates high pressure under the action of centrifugal force of vane, volumetric water pump is used to transmit energy and form high pressure by the change of its working chamber volume, regardless of which water pump, the water sucked due to the action of high pressure is mixed with vibration noise, which will disturb the working environment of water pump and cause interference and damage to the hearing of operator, and will penetrate the wall to form noise pollution to the nearby area, but there is no device that can effectively reduce noise on the water pump of prior art. SUMMARY

[0003] The present application aims to overcome the shortcomings of the prior art, and provide a water pump noise reduction device for effectively reducing water pump noise.

[0004] The present application is realized by the following technical solutions:

[0005] A water pump noise reduction device, comprising a water pump shell 1, the water pump shell 1 is provided with a water cavity 11 and a water outlet 12, characterized in that the water cavity 11 is provided with a sound attenuation cavity 13 communicated with the water outlet 12, the sound attenuation cavity 13 is provided with a sound attenuation block 2, the sound attenuation block 2 is provided with a communication cavity 25 communicated with the water cavity 11 and the water outlet 12, and the sound attenuation block 2 is provided with a plurality of sound attenuation holes 23 communicated with the sound attenuation cavity 13 and the communication cavity 25.

[0006] The water pump noise reduction device as described above, characterized in that the communication cavity 25 is provided with a throttling orifice plate 4, and the throttling orifice plate 4 is provided with an auxiliary sound attenuation hole 41.

[0007] The water pump noise reduction device as described above, characterized in that the sound attenuation block 2 is provided with a water inlet channel 21 communicated with the water cavity 11 and a water outlet channel 22 communicated with the water outlet 12, the water inlet channel 21, the communication cavity 25 and the water outlet channel 22 are communicated in sequence, and the sound attenuation hole 23 is arranged on the side wall of the communication cavity 25.

[0008] The water pump noise reduction device as described above, characterized in that the axis of the water inlet channel 21 is perpendicular to the axis of the water outlet channel 22.

[0009] The water pump noise reduction device as described above, characterized in that the end of the water inlet channel 21 is provided with a blocking wall 24 for blocking water flow.

[0010] The water pump noise reduction device as described above is characterized in that the sound-absorbing cavity 13 is open on one side and communicates with the water cavity 11, the sound-absorbing block 2 blocks the opening of the sound-absorbing cavity 13, and at least one outer wall of the sound-absorbing block 2 is separated from the inner wall of the sound-absorbing cavity 13.

[0011] The water pump noise reduction device as described above is characterized in that the sound-absorbing block 2 is provided with a positioning surface 26 abutting against the inner wall of the sound-absorbing cavity 13, the positioning surface 26 is provided with sound-absorbing holes 23, and the inner wall of the sound-absorbing cavity 13 is provided with a communication groove 14 communicating with the sound-absorbing holes 23.

[0012] Compared with the prior art, the water pump noise reduction device has the following advantages:

[0013] 1. When the water pump is working, the water in the water cavity is mixed with noise energy under the action of high pressure. After the water in the water cavity enters the communication cavity, part of the water goes out from the water outlet through the communication cavity, and the other part of the water is divided into streams and enters the sound-absorbing cavity through the sound-absorbing holes, so that the noise energy is divided. The noise occurs reflection and interference in the sound-absorbing cavity, is fully reflected in the sound-absorbing cavity, intersects with each other, consumes energy with each other, attenuates the noise energy, and reduces the noise.

[0014] 2. The water pump noise reduction device is provided with a throttle hole plate. The water flows out through the auxiliary sound-absorbing holes on the throttle hole plate. The water has resistance when passing through the throttle hole plate, the pressure is reduced due to energy loss, and the noise caused by the high-pressure water flow is reduced.

[0015] 3. The water pump noise reduction device is provided with a blocking wall at the end of the water inlet channel. The water can only flow out between the top of the blocking wall and the inner wall of the communication cavity, hinders the water flow, is beneficial to the water flowing into the sound-absorbing cavity through the sound-absorbing holes, and increases the noise reduction effect. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 is a structural sectional view of the water pump noise reduction device;

[0017] Figure 2 is an exploded structural schematic view of the water pump noise reduction device;

[0018] Figure 3 is a three-dimensional structural schematic view of the sound-absorbing block;

[0019] Figure 4 is an exploded structural schematic view of the sound-absorbing block;

[0020] Figure 5 is a three-dimensional structural schematic view of the throttle hole plate;

[0021] Figure 6 is Figure 1 is a sectional view of A-A in the throttle hole plate;

[0022] Figure 7 is Figure 6 is an enlarged view of C in the figure;

[0023] Figure 8 is Figure 6 is a sectional view of B-B in the figure;

[0024] Figure 9 is a partial structural schematic view of a water pump equipped with the noise reduction device of the present application.

DETAILED DESCRIPTION

[0025] The present application will be further described below in conjunction with the accompanying drawings:

[0026] As Figures 1 to 9 shown, a water pump noise reduction device comprises a water pump housing 1, a water cavity 11 and a water outlet 12 are arranged in the water pump housing 1, a sound attenuation cavity 13 is arranged in the water cavity 11 and is in communication with the water outlet 12, a sound attenuation block 2 is arranged in the sound attenuation cavity 13, a communication cavity 25 is arranged in the sound attenuation block 2 and is in communication with the water cavity 11 and the water outlet 12, and a plurality of sound attenuation holes 23 are arranged on the sound attenuation block 2 and are in communication with the sound attenuation cavity 13 and the communication cavity 25. With the above structure, when the water pump is working, the water in the water cavity 11 is mixed with noise energy under high pressure, after the water in the water cavity 11 enters the communication cavity 25, a part of the water goes out from the water outlet 12 through the communication cavity 25, and the other part of the water is branched into the sound attenuation cavity 13 through the plurality of sound attenuation holes 23, thereby branching the noise energy, the noise is reflected and interfered in the sound attenuation cavity 13, is fully reflected and intersects with each other in the sound attenuation cavity, consumes energy with each other, attenuates the noise energy, and achieves the effect of reducing noise.

[0027] A throttle orifice plate 4 is arranged in the communication cavity 25, and an auxiliary sound attenuation hole 41 is arranged on the throttle orifice plate 4. When the water needs to flow out through the auxiliary sound attenuation hole 41 on the throttle orifice plate 4, the water flow is resisted, the pressure is reduced due to energy loss, and the noise caused by the high-pressure water flow is reduced. In actual application, a plurality of auxiliary sound attenuation holes 41 can be arranged, the water needs to flow out through the plurality of auxiliary sound attenuation holes 41 on the throttle orifice plate 4, according to the small-hole injection noise control theory, since the peak frequency of the injection noise is inversely proportional to the diameter of the nozzle, after the water flows through the smaller auxiliary sound attenuation holes 41, the peak frequency of the noise shifts from low frequency to high frequency, reaches the frequency range that is not sensitive to human ears, and thereby reduces the noise. The throttle orifice plate 4 is a plurality of and is distributed at intervals in the communication cavity 25, throttles and reduces pressure, the discharge of the one-time pressure drop is dispersed to a plurality of pressure drops by arranging a plurality of throttle orifice plates 4, the fluid pressure is gradually reduced, the vibration caused by the discharge is reduced, the shock noise is avoided, the noise reduction device obtains a better noise reduction effect.

[0028] The sound reduction block 2 is provided with a water inlet channel 21 communicating with the water cavity 11 and a water outlet channel 22 communicating with the water outlet 12, the water inlet channel 21, the communicating cavity 25 and the water outlet channel 22 are communicated in sequence, and the sound reduction hole 23 is arranged on the side wall of the communicating cavity 25. When the water pump is working, the water in the water cavity 11 flows into the communicating cavity 25 of the sound reduction block 2 through the water inlet channel 21, the water in the communicating cavity 25 flows to the water outlet 12 through the water outlet channel 22 after being reduced in sound, and then is output through the water outlet 12.

[0029] The axis of the water inlet channel 21 is perpendicular to the axis of the water outlet channel 22. The perpendicular of the water inlet channel 21 and the water outlet channel 22 forms a corner, when the water flows into the sound reduction block 2 from the water inlet channel 21, the water flow slows down after passing through the corner. In actual application, a circular arc transition can be arranged at the corner to reduce the impact of water flow and reduce the generation of noise.

[0030] As shown in Figure 1 and Figure 4 , the end of the water inlet channel 21 is provided with a blocking wall 24 for blocking water flow, one end of the blocking wall 24 is provided with a gap with the inner wall of the communicating cavity 25 so that the communicating cavity 25 is communicated, the water can only flow out from the top of the blocking wall 24 and the inner wall of the communicating cavity 25, which hinders the water flow, is beneficial to the water flowing into the sound reduction cavity 13 from the sound reduction hole 23, and increases the noise reduction effect.

[0031] One side of the sound reduction cavity 13 is open and communicated with the water cavity 11, the sound reduction block 2 blocks the opening of the sound reduction cavity 13, so that the water cavity 11 and the sound reduction cavity 13 need to be communicated through the sound reduction block 2 instead of being directly communicated, at least one outer wall of the sound reduction block 2 is spaced apart from the inner wall of the sound reduction cavity 13 to form a shunt resonance space, so that the water flow can enter the sound reduction cavity 13 through the sound reduction hole 23 to achieve the sound reduction effect.

[0032] As shown in Figure 3 and Figure 7 , the sound reduction block 2 is provided with a positioning surface 26 abutting against the inner wall of the sound reduction cavity 13, the positioning surface 26 is provided with the sound reduction hole 23, and the inner wall of the sound reduction cavity 13 is provided with a communicating groove 14 communicated with the sound reduction hole 23. The positioning surface 26 abuts against the inner wall of the sound reduction cavity 13 to play a positioning role, and by arranging the communicating groove 14, the water in the communicating cavity 25 can flow into the communicating groove 14 through the sound reduction hole 23, and then enter the sound reduction cavity 13 through the communicating groove 14, so that the noise energy is shunted, the sound energy is consumed after contraction and expansion, and the noise is reduced.

[0033] The sound reduction cavity 13 is provided with a protrusion 15, one end of the sound reduction block 2 is provided with a mounting protruding edge 27 covering the opening of the sound reduction cavity 13, the mounting protruding edge 27 abuts against the protrusion 15, the mounting protruding edge 27 is provided with a screw 5 for fixing the sound reduction block 2 in the sound reduction cavity 13, and the protrusion 15 is provided with a threaded hole for thread connection of the screw.

[0034] As shown in Figure 4As shown, the muffler block 2 consists of two parts. In actual production, the throttling orifice plate 4 can be fixed to the inside of the parts by welding, snap-fitting, etc., and then the two parts of the muffler block 2 can be connected together by welding, screwing, etc. to form the muffler block 2. The assembly method is simple and efficient.

[0035] like Figure 9 As shown, taking a diaphragm pump as an example, the reciprocating pulsation of the diaphragm 6, driven mechanically or pneumatically, can change the volume, thereby drawing water into the water chamber 11 or discharging water out of the water chamber 11. When the diaphragm 6 bulges away from the water chamber 11, a low pressure is formed inside the water chamber 11, and water is drawn into the water chamber 11 from the inlet 16 of the pump housing 1; when the diaphragm 6 bulges towards the water chamber 11, water enters from the inlet channel 21 of the silencing block 2, and after passing through the silencing block, water is discharged from the outlet 12 of the pump 1, resulting in good noise reduction.

Claims

1. A water pump noise reduction device, comprising a water pump housing (1), wherein a water cavity (11) and a water outlet (12) are arranged in the water pump housing (1), characterized in that: The water cavity (11) is provided with a sound damping cavity (13) communicated with the water outlet (12), the sound damping cavity (13) is provided with a sound damping block (2), the sound damping block (2) is provided with a communicating cavity (25) communicated with the water cavity (11) and the water outlet (12), the sound damping block (2) is provided with a plurality of sound damping holes (23) communicated with the sound damping cavity (13) and the communicating cavity (25); the sound damping block (2) is provided with a positioning surface (26) abutting against the inner wall of the sound damping cavity (13), the positioning surface (26) is provided with a sound damping hole (23), the inner wall of the sound damping cavity (13) is provided with a communicating groove (14) communicated with the sound damping hole (23), so that water flows from the communicating cavity (25) into the communicating groove (14) through the sound damping hole (23), and then enters the sound damping cavity (13) through the communicating groove (14); the communicating cavity (25) is provided with a throttling hole plate (4), the throttling hole plate (4) is provided with an auxiliary sound damping hole (41); the throttling hole plate (4) is a plurality of and is distributed in the communicating cavity (25) at intervals; one side of the sound damping cavity (13) is open and communicated with the water cavity (11), the sound damping block (2) blocks the opening of the sound damping cavity (13), and at least one outer wall of the sound damping block (2) is separated from the inner wall of the sound damping cavity (13).

2. The water pump noise reduction apparatus of claim 1, wherein: The sound damping block (2) is provided with a water inlet channel (21) communicated with the water cavity (11) and a water outlet channel (22) communicated with the water outlet (12), the water inlet channel (21), the communicating cavity (25) and the water outlet channel (22) are communicated in sequence, and the sound damping hole (23) is arranged on the side wall of the communicating cavity (25).

3. The water pump noise reduction apparatus of claim 2, wherein: The axis of the water inlet channel (21) is perpendicular to the axis of the water outlet channel (22).

4. The water pump noise reduction apparatus of claim 2, wherein: The end of the water inlet channel (21) is provided with a blocking wall (24) for blocking water flow.

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