Low-noise fan device of sanitation vehicle

Abstract

The utility model provides a low-noise fan device of a sanitation truck, which comprises a fan body, the fan body comprises a fan casing and an impeller, a fixed frame is fixedly arranged on the outer wall of the fan casing in a surrounding manner, the impeller is arranged in the fan casing and is driven by a rotary driving device to rotate, and the fan casing is mounted on a frame of a corresponding vehicle through the fixed frame. An exhaust inlet and an exhaust outlet are formed in the side wall of the fan shell in a penetrating manner; the sound insulation cover covers the outer side of the fan body and is mounted on the frame; the air inlet piece penetrates through the sound insulation cover and communicates with the air suction opening; and one end of the exhaust part penetrates through the soundproof cover and communicates with the exhaust outlet, and the other end communicates with the outside. The mounting height of the fan shell can be reduced so as to reduce the overall gravity center, the shaking amplitude of the fan shell during working is reduced, meanwhile, vibration of the fan shell can be directly transmitted to the frame through the fixing frame and then dispersed, and therefore noise generated by vibration of the fan shell is reduced, active noise reduction is achieved, and on the basis, the noise reduction efficiency is improved. And noise generated by the fan body is prevented from spreading outwards through the sound insulation cover, and passive noise reduction is achieved.

Description

Technical Field

[0001] The utility model relates to the field of washing and sweeping vehicles, in particular to a low-noise fan device for a sanitation vehicle. Background Art

[0002] At present, centrifugal fans are mainly used as the power source for sucking up garbage in the dustbin of sanitation vehicles. A centrifugal fan is a device that converts the mechanical energy of the rotation of the fan impeller into the pressure energy and kinetic energy of the gas. However, when the centrifugal fan is working and exhausting, it will generate relatively large noise, forming noise pollution.

[0003] In order to reduce noise, sound-absorbing materials are added to the inner wall of the air outlet of the centrifugal fan of the existing sanitation vehicle. However, due to the small area of the sound-absorbing materials, the noise reduction effect is not obvious. In addition, the volute of the existing centrifugal fan is arranged between the dustbin and the cab and at a relatively high position, and there will be relatively large vibration during operation, generating relatively large noise.

[0004] Aiming at the problems existing in the above-mentioned prior art, designing a low-noise fan device for a sanitation vehicle is the purpose of the research of the present utility model. Content of the Utility Model

[0005] Aiming at the problems existing in the above-mentioned prior art, the present utility model provides a low-noise fan device for a sanitation vehicle, which can effectively solve the problems existing in the above-mentioned prior art.

[0006] The technical solution of the present utility model is as follows:

[0007] A low-noise fan device for a sanitation vehicle, comprising:

[0008] A fan body, including a fan housing with a fixed frame fixedly surrounded on the outer wall, and an impeller arranged in the fan housing and driven by a rotation driving device to rotate. The fan housing is installed on the vehicle frame of the corresponding vehicle through the fixed frame, and air inlets and air outlets are respectively arranged through the side wall of the fan housing;

[0009] A sound insulation cover, covering the outside of the fan body and installed on the vehicle frame;

[0010] An air inlet part, passing through the sound insulation cover and communicating with the air inlet;

[0011] An exhaust part, one end of which passes through the sound insulation cover and communicates with the air outlet, and the other end communicates with the outside.

[0012] Furthermore, the fixed frame includes a base with a groove at the top, and a plurality of ribs fixedly arranged on the outer wall of the blower housing except the bottom. The plurality of ribs are vertically and horizontally distributed and fixedly intersect on the outer wall of the blower housing to enclose a rib frame with an open bottom side. The lower part of the blower housing is fixedly arranged in the groove and is arranged with a gap from the bottom of the groove. Moreover, the open bottom side of the rib frame is fixedly connected to the top of the base, and the base is screwed on the vehicle frame.

[0013] Furthermore, the exhaust part is detachably arranged with the air outlet, and a plurality of ear plates for screwing with the vehicle frame are arranged on the outer wall. From one end to the other end inside the exhaust part, there are successively an intake area, an expansion area, and a sound absorption area. The intake area is adaptively communicated with the air outlet. The inner diameter of the expansion area gradually increases in the direction away from the blower housing. The sound absorption area is divided into a plurality of contraction areas with an inner diameter smaller than that of the expansion area by a plurality of partition plates. The plurality of contraction areas are arranged in parallel and are respectively communicated with the expansion area and the outside at both ends. Sound absorption materials are arranged on the side walls of the plurality of contraction areas.

[0014] Furthermore, the outer diameter of one end of the plurality of partition plates close to the expansion area gradually decreases in the direction close to the expansion area to form a flow-breaking part.

[0015] Furthermore, the rotary driving device is a motor that penetrates through the sound insulation cover and is detachably arranged on the side wall of the blower housing, and the output shaft penetrates into the blower housing to connect the impeller. Sealant is filled between the sound insulation cover, the fixed frame, the blower housing, and the motor.

[0016] Furthermore, the sound insulation cover includes a top cover and a bottom cover that are detachably arranged up and down. The bottom cover is arranged on the vehicle frame and covers the outer sides of the lower parts of the blower housing, the fixed frame, and the motor. The top cover covers the outer sides of the upper parts of the blower housing, the fixed frame, and the motor. Sound-absorbing cotton is covered and pasted on the outer wall of the sound insulation cover, and aluminum foil is arranged on the outer wall of the sound-absorbing cotton.

[0017] Therefore, the present invention provides the following effects and / or advantages:

[0018] 1. The blower housing is installed on the vehicle frame of the corresponding vehicle through the fixed frame fixedly surrounded by its outer wall, so that the installation height of the blower housing can be reduced to lower the overall center of gravity, and the shaking amplitude of the blower housing during operation can be reduced. At the same time, the vibration of the blower housing can be directly conducted to the vehicle frame through the fixed frame and then dispersed, thereby reducing the noise generated by the vibration of the blower housing, that is, reducing the noise generated by the blower body as a noise source outward, realizing active noise reduction. On this basis, the noise generated by the blower body is blocked from spreading outward through the sound insulation cover, thereby further reducing the overall noise of the blower device, realizing passive noise reduction. Therefore, a low-noise blower device with double internal and external noise reduction is realized through the combination of active noise reduction and passive noise reduction.

[0019] 2. The contact area between the fixing frame and the vehicle frame is increased through the base, and the rib frame connected to the base wraps around and fixes the blower housing, and then sets the clearance between its bottom and the bottom of the groove, so that while the fixing frame fixes the blower main body in all directions, it avoids the blower housing from colliding with the bottom of the groove due to the bumps of the vehicle frame, resulting in noise or damage, thereby realizing the stable connection between the fixing frame and the vehicle frame and stably fixing the blower main body.

[0020] 3. Through the setting of the ear plates, the vibration of the exhaust part can be directly transmitted to the vehicle frame and then dispersed, thereby reducing the noise generated by the vibration of the exhaust part. And through the setting of several partitions, the installation area of the sound-absorbing material is increased, the quantity of the sound-absorbing material is increased, and the effect of absorbing noise is improved. Then, through the settings of the air inlet area, the expansion area, and the sound insulation area, the exhaust passage of the exhaust part gradually increases in the expansion area first to reduce the exhaust air speed and reduce the exhaust noise, and then is reduced to several in the sound insulation area to increase the contact area between the air flow and the sound-absorbing material on the inner wall of the contraction area, so that the noise is absorbed by the sound-absorbing material and the leaked noise is reduced. In summary, the noise generated when the blower main body exhausts is reduced, and the overall noise of the blower device is further reduced.

[0021] 4. Through the setting of the sealant, the propagation medium between the blower main body and the sound insulation cover is changed, and the resistance to the outward propagation of the noise generated by the blower main body is increased, so as to further prevent the noise generated by the blower main body from leaking out and reduce the overall noise of the blower device.

[0022] 5. Through the triple barriers formed by the sound insulation cover, the sound-absorbing cotton, and the aluminum foil from the inside to the outside, the sound insulation effect of the sound insulation cover is improved, further avoiding the leakage of the noise of the blower main body and reducing the overall noise of the blower device.

[0023] It should be understood that the above summary and the following detailed description of the present invention are exemplary and explanatory, and are intended to provide further explanation of the present invention as claimed. Brief Description of the Drawings

[0024] Figure 1 It is a schematic structural diagram of a low-noise blower device of a sanitation vehicle installed on a vehicle frame.

[0025] Figure 2 It is Figure 1 The schematic structural diagram after removing the sound insulation cover.

[0026] Figure 3 It is a schematic structural diagram of a low-noise blower device of a sanitation vehicle.

[0027] Figure 4 It is Figure 3 The sectional view of

[0028] Figure 5 It is a schematic sectional view of the exhaust part. Detailed implementation mode

[0029] For the convenience of those skilled in the art to understand, the structure of the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments:

[0030] Reference Figures 1-5 , a low-noise fan device for a sanitation vehicle, comprising:

[0031] A fan body 1, including a fan housing 11 with a fixed frame 6 fixedly surrounded on the outer wall, and an impeller 12 arranged in the fan housing 11 and driven to rotate by a rotation driving device 5. The fan housing 11 is installed on the vehicle frame 7 of the corresponding vehicle through the fixed frame 6. The side wall of the fan housing 11 is provided with an air inlet and an air outlet in a penetrating manner; specifically, the corresponding vehicle is a sanitation vehicle, and the vehicle frame 7 is the sub-frame 7 of the sanitation vehicle;

[0032] A sound insulation cover 2, covering the outside of the fan body 1 and installed on the vehicle frame 7;

[0033] An air inlet member 3, penetrating through the sound insulation cover 2 and communicating with the air inlet; specifically, the air inlet member 3 communicates with the dustbin of the sanitation vehicle. The air inlet member 3 adopts a circular tube structure and is connected to the air inlet through a flange, which can reduce the air resistance, reduce the vortex, improve the efficiency of the fan body 1, and reduce the noise of the fan body 1;

[0034] An exhaust member 4, one end of which penetrates through the sound insulation cover 2 and communicates with the air outlet, and the other end communicates with the outside.

[0035] With the above structure, the fan housing 11 is installed on the vehicle frame 7 of the corresponding vehicle through the fixed frame 6 fixedly surrounded on its outer wall, so that the installation height of the fan housing 11 can be reduced to lower the overall center of gravity, and the vibration amplitude of the fan housing 11 during operation can be reduced. At the same time, the vibration of the fan housing 11 can be directly transmitted to the vehicle frame 7 through the fixed frame 6 and then dispersed, thereby reducing the noise generated by the vibration of the fan housing 11, that is, reducing the noise generated by the fan body 1 as a noise source outward, realizing active noise reduction. On this basis, the sound insulation cover 2 is used to block the noise generated by the fan body 1 from spreading outward, thereby further reducing the overall noise of the fan device and realizing passive noise reduction. Therefore, a low-noise fan device with double internal and external noise reduction is realized through the combination of active noise reduction and passive noise reduction.

[0036] To improve the installation stability of the fan body 1, the fixed frame 6 includes a base 61 with a groove 611 at the top, and a plurality of ribs fixedly arranged on the outer wall of the fan housing 11 except the bottom. The plurality of ribs are vertically and horizontally distributed and fixedly intersect on the outer wall of the fan housing 11 to enclose a rib frame 62 with an open bottom side. The lower part of the fan housing 11 is fixedly arranged in the groove 611 and is arranged with a gap from the bottom of the groove 611. And the open bottom side of the rib frame 62 is fixedly connected to the top of the base 61. The base 61 is screwed on the vehicle frame 7. Specifically, the rib frame 62 and the fan housing 11 are welded. The lower side wall of the fan housing 11 and the inner wall of the groove 611 are welded. The base 62 is formed by welding a sealing plate between two channel steels with opposite notch openings. The contact area between the fixed frame 6 and the vehicle frame 7 is increased through the base 61. And after the fan housing 11 is wrapped and fixed by the rib frame 62 connected to the base 61 and lifted, a gap is arranged between its bottom and the bottom of the groove 611. While the fixed frame 6 fixes the fan main body in all directions, it is avoided that the fan housing 11 collides with the bottom of the groove 611 after being jolted by the vehicle frame 7, resulting in noise or damage. Thus, while the fixed frame 6 is stably connected to the vehicle frame 7, the fan main body is stably fixed.

[0037] To reduce the noise of the exhaust of the fan main body, the exhaust part 4 is detachably arranged with the air outlet, and a plurality of ear plates 41 screwed to the vehicle frame 7 are arranged on the outer wall. From one end to the other end in the exhaust part 4, there are successively an intake area 42, an expansion area 43, and a sound absorption area 44. The intake area 42 is adaptively communicated with the air outlet. The inner diameter of the expansion area 43 gradually increases in the direction away from the fan housing 11. The sound absorption area 44 is divided into a plurality of contraction areas 441 with an inner diameter smaller than that of the expansion area 43 by a plurality of partition plates 45. The plurality of contraction areas 441 are arranged in parallel and are respectively communicated with the expansion area 43 and the outside at both ends. Sound absorption materials (not shown in the figure) are arranged on the side walls of the plurality of contraction areas 441. Specifically, the sound absorption materials can be set as sound absorption cotton. The exhaust part 4 is detachably arranged with the air outlet through flange connection, so as to facilitate the disassembly and assembly of the exhaust part 4 to replace or clean the sound absorption materials. Through the arrangement of the ear plates 41, the vibration of the exhaust part 4 can be directly transmitted to the vehicle frame 7 and then dispersed, thus reducing the noise generated by the vibration of the exhaust part 4. And through the arrangement of the plurality of partition plates 45, the installation area of the sound absorption materials is increased, the number of the sound absorption materials is increased, and the effect of absorbing noise is improved. Then, through the arrangement of the intake area 42, the expansion area 43, and the sound absorption area 44, the exhaust passage of the exhaust part 4 gradually increases in the expansion area 43 first to reduce the exhaust wind speed and reduce the exhaust noise. Then, it is reduced to a plurality of in the sound absorption area 44 to increase the contact area between the air flow and the sound absorption materials on the inner wall of the contraction area 441, so that the noise is absorbed by the sound absorption materials and the leaked noise is reduced. In summary, the noise generated when the fan main body exhausts is reduced, and the overall noise of the fan device is further reduced.

[0038] In order to achieve air flow bifurcation for the exhaust gas entering the contraction area 441 from the expansion area 43, the outer diameters of several of the partition plates 45 gradually decrease towards the expansion area 43 at one end close to the expansion area 43 to form a flow-breaking part 451.

[0039] In order to further prevent the noise generated by the fan main body from leaking out, the rotary drive device 5 is a motor that penetrates through the sound insulation cover 2 and is detachably arranged on the side wall of the fan housing 11, and the output shaft 51 penetrates into the fan housing 11 to connect the impeller 12. A sealant (not shown in the figure) is filled between the sound insulation cover 2, the fixed frame 6, the fan housing 11, and the motor. Specifically, the sealant is set as a polyurethane sealant. Thus, by the setting of the sealant, the propagation medium between the fan main body and the outside to the sound insulation cover 2 is changed, and the resistance to the outward propagation of the noise generated by the fan main body is increased, so as to further prevent the noise generated by the fan main body from leaking out and reduce the overall noise of the fan device.

[0040] In order to improve the sound insulation effect of the sound insulation cover 2, the sound insulation cover 2 includes a top cover 21 and a bottom cover 22 that are detachably arranged in an up-and-down split manner. The bottom cover 22 is arranged on the vehicle frame 7 and covers the lower outer sides of the fan housing 11, the fixed frame 6, and the motor. The top cover 21 covers the upper outer sides of the fan housing 11, the fixed frame 6, and the motor. The outer wall of the sound insulation cover 2 is covered and pasted with sound-absorbing cotton (not shown in the figure), and the outer wall of the sound-absorbing cotton is provided with aluminum foil (not shown in the figure). This makes the sound insulation cover 2, the sound-absorbing cotton, and the aluminum foil form a triple barrier from the inside to the outside, thereby improving the sound insulation effect of the sound insulation cover 2, further avoiding the leakage of the noise of the fan main body, and reducing the overall noise of the fan device.

[0041] The above are only the preferred embodiments of the present invention and are not used to limit the present invention. For those skilled in the art, the present invention can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A low-noise fan device for a sanitation vehicle, characterized in that, Comprising: The fan body (1) includes a fan housing (11) with a fixed frame (6) fixedly surrounded on the outer wall, and an impeller (12) disposed within the fan housing (11) and driven to rotate by a rotation driving device (5). The fan housing (11) is mounted on the vehicle frame (7) of the corresponding vehicle through the fixed frame (6). The side wall of the fan housing (11) is provided with a suction port and an exhaust port penetrating therethrough; A sound insulation cover (2) is disposed outside the fan body (1) and mounted on the vehicle frame (7); An air inlet member (3) penetrates through the sound insulation cover (2) and communicates with the suction port; An exhaust member (4), one end of which penetrates through the sound insulation cover (2) and communicates with the exhaust port, and the other end communicates with the outside.

2. The low-noise fan device of a sanitation vehicle according to claim 1, characterized in that, The fixed frame (6) includes a base (61) with a groove (611) provided at the top, and a plurality of ribs fixedly provided on the outer wall of the fan housing (11) except the bottom. The plurality of ribs are vertically and horizontally distributed and fixedly intersect on the outer wall of the fan housing (11) to enclose a rib frame (62) with an open bottom side. The lower part of the fan housing (11) is fixedly disposed within the groove (611) and is provided with a gap with the bottom of the groove (611). And the open bottom side of the rib frame (62) is fixedly connected to the top of the base (61). The base (61) is screwed to the vehicle frame (7).

3. The low-noise fan device of a sanitation vehicle according to claim 1, characterized in that The exhaust member (4) is detachably disposed with the exhaust port, and a plurality of ear plates (41) for screwing to the vehicle frame (7) are provided on the outer wall. One end to the other end of the exhaust member (4) sequentially includes an intake area (42), an expansion area (43), and a sound absorption area (44). The intake area (42) is adapted to communicate with the exhaust port. The inner diameter of the expansion area (43) gradually increases in a direction away from the fan housing (11). The sound absorption area (44) is separated by a plurality of partition plates (45) into a plurality of contraction areas (441) with an inner diameter smaller than that of the expansion area (43). The plurality of contraction areas (441) are arranged in parallel and both ends communicate with the expansion area (43) and the outside respectively. Sound absorption materials are provided on the side walls of the plurality of contraction areas (441).

4. The low-noise fan device of a sanitation vehicle according to claim 3, characterized in that The outer diameter of one end of the plurality of partition plates (45) close to the expansion area (43) gradually decreases in a direction close to the expansion area (43) to form a flow-breaking portion (451).

5. The low-noise fan device of a sanitation vehicle according to claim 4, characterized in that The rotation driving device (5) is a motor that penetrates through the sound insulation cover (2) and is detachably disposed on the side wall of the fan housing (11), and the output shaft (51) penetrates into the fan housing (11) to connect the impeller (12). A sealant is filled between the sound insulation cover (2), the fixed frame (6), the fan housing (11), and the motor.

6. The low-noise fan device of a sanitation vehicle according to claim 1, characterized in that, The sound insulation cover (2) includes a top cover (21) and a bottom cover (22) that are detachably disposed in an upper and lower split manner. The bottom cover (22) is disposed on the vehicle frame (7) and covers the lower outer sides of the fan housing (11), the fixed frame (6), and the motor. The top cover (21) covers the upper outer sides of the fan housing (11), the fixed frame (6), and the motor. The outer wall of the sound insulation cover (2) is covered and pasted with sound absorption cotton, and aluminum foil is provided on the outer wall of the sound absorption cotton.

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