Fan system noise reduction structure of electric sanitation vehicle

Abstract

The utility model relates to a fan system noise reduction structure of an electric sanitation vehicle. The fan system noise reduction structure comprises a front water tank, a water tank underframe, a frame, a fan, a first silencer, a second silencer, a third silencer and a dustbin. The front water tank is fixed on the water tank underframe, and the frame is arranged on the water tank underframe; one end of the frame is fixed on the front water tank, and the other end of the frame is fixed on the frame; the fan fixing assembly is borne by the frame; the garbage can is installed on an auxiliary frame of the sanitation vehicle. According to the fan system noise reduction structure of the electric sanitation vehicle, the fan is flexibly installed in the closed space with the sound absorption materials pasted inside, and noise and vibration generated when the fan operates are effectively reduced. Three stages of silencers are installed by fully utilizing the space from top to bottom, the total length and size of the silencers exceed those of a traditional sanitation vehicle, and the air outlet and noise reduction effects of the fan are remarkable. The fan is lifted, the space utilization rate is high, and the fan is convenient to maintain.

Description

Technical Field

[0001] The utility model relates to a noise reduction structure of a fan system of a pure electric sanitation vehicle, belonging to the technical field of special vehicles. Background Art

[0002] The existing fan systems of pure electric sanitation vehicles are generally applied to pure electric drive road sweepers, road cleaners, and dust collectors. When working, the motor drives the centrifugal fan, and the suction force generated by the centrifugal fan is used to suck the garbage and sewage on the ground into the garbage bin, and the relatively clean air is discharged from the fan outlet.

[0003] The existing pure electric sanitation vehicle fans generally follow the vertical fixed installation method of fuel-powered sanitation vehicles, that is, the fan is installed on the subframe through its frame, the fan operation plane is perpendicular to the ground, and a section of muffler is installed at the fan outlet. The problem with this installation method is that the fan housing is completely exposed, and the noise inside the fan is completely transmitted outside through the fan housing. And limited by the installation space, the volume of the muffler is small, and the noise reduction effect at the outlet is limited.

[0004] The other two installation methods of the pure electric sanitation vehicle fan are that the fan is directly installed at the front end of the garbage bin or on the top of the garbage bin, and the fan and the motor are lifted together with the bin, and the muffler at the fan outlet is also installed on the garbage bin. In the former method, the fan housing is completely exposed, and the noise inside the fan is not effectively controlled; in the latter method, the fan can be hidden on the top of the bin, which has a certain noise reduction effect on the fan. These two methods require high installation and maintenance requirements for the motor and high-voltage cables because the motor and the fan will be lifted together with the garbage bin, increasing the use cost. In addition, if a larger muffler needs to be installed to enhance the noise reduction effect, the total weight of the bin will be further increased, which is not conducive to the lifting operation. Summary of the Invention

[0005] The purpose of the utility model is to provide a noise reduction structure that can solve the deficiencies of the fan system of pure electric sanitation vehicles in terms of noise reduction effect and use, so as to overcome the problems in the prior art.

[0006] To solve the above technical problems, the technical solution proposed by the present utility model is: a noise reduction structure for the fan system of an electric sanitation vehicle, comprising: a front water tank, a water tank chassis, a frame, a fan, a first muffler, a second muffler, a third muffler, and a dustbin; the front water tank is fixed on the water tank chassis, the frame is arranged on the water tank chassis, and the fan is installed on a fan fixing component; one end of the frame is fixed on the front water tank, and the other end is fixed on the frame; the frame bears the fan fixing component; the air inlet of the fan faces upward of the sanitation vehicle; the dustbin is installed on the subframe of the sanitation vehicle, and the dustbin includes a garbage suction cylinder, a filter screen, a suction port, and a front cover; the suction port is flange-connected to the air inlet of the fan, the first muffler is fixed on the frame, and the air outlet of the fan is sequentially connected to the first muffler, the second muffler, and the third muffler; both the water tank chassis and the subframe are installed on the chassis of the sanitation vehicle.

[0007] The above technical solution is further improved in that: a notch is opened at the rear of the front water tank to accommodate the frame.

[0008] The above technical solution is further improved in that: the fan fixing component includes a bottom plate, bottom sound-absorbing cotton, a fan shock pad, a side enclosure, side sound-absorbing cotton, a fixing block, top plate sound-absorbing cotton, and a top plate; several fan shock pads are installed on the frame, the bottom plate is fixed on the frame, the bottom sound-absorbing cotton is pasted on the upper surface of the bottom plate, there are several fan fixing lugs on the fan, and the fixing lugs correspond to the fan shock pads one by one; the side enclosure is installed on the frame and encloses the periphery of the fan, and the side sound-absorbing cotton is pasted inside the side enclosure; there are several fixing blocks on the upper surface of the side enclosure, the air inlet flange of the fan is in a shape of being smaller at the top and larger at the bottom, the upper part of the air inlet flange of the fan has an air inlet sealing ring and is connected to the suction port, and the lower part is installed with an air inlet shock pad; the upper surfaces of the fixing block and the air inlet shock pad are in the same plane, the bottom surface of the top plate is pasted with top plate sound-absorbing cotton, and the top plate is laid flat and fixed on the fixing block and the air inlet shock pad.

[0009] The above technical solution is further improved in that: a notch is opened at the air outlet of the fan on the side enclosure, positioning bolts are welded outward on both sides of the notch, a lower sealing strip is installed at the lower end of the notch, the fan fixing component further includes a sealing frame, the sealing frame is installed in the notch through the positioning bolts, the sealing frame is installed with an upper sealing strip for clamping the air outlet pipe of the fan, the sealing frame and the side enclosure have the same flanging, and the fixing block is arranged on the flanging.

[0010] A further improvement of the above technical solution is that the second muffler is fixed to the frame through a first transition bracket and a first rubber shock pad; the third muffler is fixed to the water tank chassis and the sub-frame through a second transition bracket and a second rubber shock pad.

[0011] A further improvement of the above technical solution is that the second muffler has a Z-shaped appearance, and the air outlet direction of the third muffler faces the rear of the sanitation vehicle.

[0012] A further improvement of the above technical solution is that the channel area of the first muffler is larger than that of the second or third muffler; the channel area of the second or third muffler is larger than the air outlet area of the fan.

[0013] A further improvement of the above technical solution is that the inner surface of the front cover is pasted with cover sound-absorbing cotton.

[0014] A further improvement of the above technical solution is that there are threaded blocks on the fan for the installation and lifting of the fan.

[0015] The noise reduction structure of the fan system of the electric sanitation vehicle provided by the present invention flexibly installs the fan in a closed space with sound-absorbing materials pasted inside, effectively reducing the noise and vibration during the operation of the fan. Three-stage mufflers are installed by making full use of the space from top to bottom. The total length and volume of the mufflers exceed those of traditional sanitation vehicles, and the noise reduction effect of the fan air outlet is remarkable. The fan is arranged at a raised position, with high space utilization and convenient fan maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The present invention will be further described below with reference to the accompanying drawings.

[0017] Figure 1 is the front view of a preferred embodiment of the present invention.

[0018] Figure 2 is Figure 1 the front view of the garbage box body in the lifting state in

[0019] Figure 3 is Figure 1 the right view structural schematic diagram of

[0020] Figure 4 is Figure 1 the top view with the top plate removed.

[0021] Figure 5 is the structural and installation schematic diagram of the sealing frame and the side surround frame. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0022] The noise reduction structure of the fan system of the pure electric sanitation vehicle in this embodiment is as shown in Figure 1 、 2, as shown in Figures 3 and 4, it includes a front water tank 1, a water tank chassis 2, a frame 3, a fan 4, a fan bearing seat 5, a motor 6, a fan fixing component 7, a first muffler 8, a second muffler 9, a third muffler 10, and a garbage bin 12.

[0023] The front water tank 1 is fixed on the water tank chassis 2. The sub-frame 11 of the sanitation vehicle is behind the water tank chassis 2. The garbage bin 12 is fixed on the sub-frame 11 and can be lifted. The frame 3 is in an inverted L shape. A rectangular cuboid notch is opened at the upper rear part of the front water tank 1. One end of the frame 3 is fixed to this notch, and the other end of the frame 3 is fixed to the water tank chassis 2. The fan 4 is hermetically installed on the frame 3 by the fan fixing component 7. The fan 4 is installed horizontally, with the motor 6 below. To ensure that the motor 6 does not bear axial force, a fan bearing seat 5 is installed at the power input port of the fan 4 and then connected to the motor 6. When the garbage bin drops, the suction port 12.3 presses on the air inlet seal ring 4.3 on the air inlet flange 4.1, realizing the docking of the suction air duct. After the fan 4 works, the garbage is sucked into the garbage suction cylinder 12.1, the air flow passes through the filter screen 12.2, and the suction port 12.3 leads to the fan 4. The first muffler 8 is fixed on the frame 3. The air outlet of the fan 4 is connected to the first muffler 8, the second muffler 9, and the third muffler 10 in sequence, guiding the air outlet of the fan 4 from top to bottom into the interior of the sub-frame 11.

[0024] The fan fixing component 7 includes a bottom plate 7.1, a bottom sound-absorbing cotton 7.2, a fan shock pad 7.3, a side enclosure 7.5, a side sound-absorbing cotton 7.6, a fixing block 7.7, a top plate sound-absorbing cotton 7.8, a top plate 7.9, a sealing frame 7.10, a lower sealing strip 7.11, and an upper sealing strip 7.12. Several fan shock pads 7.3 are installed on the frame 3. The bottom plate 7.1 is fixed on the upper plane of the frame 3 after opening holes to avoid the fan bearing seat 5 and the fan shock pads 7.3. The bottom sound-absorbing cotton 7.2 is pasted on the bottom plate 7.1 after removing the parts that interfere with the fan bearing seat 5 and the fan shock pads 7.3. With the air inlet of the fan 4 facing up and the fan bearing seat 5 facing down, after installing a lifting ring bolt on the threaded block 4.4, the fan 4 is sent above the frame 3, and the fan fixing lugs 4.5 are firmly installed corresponding to the fan shock pads 7.3. The side enclosure 7.5 is a vertical surface with a horizontal flanging, which is fixed on the frame 3 and encloses the periphery of the fan 4. The side sound-absorbing cotton 7.6 is pasted on the inner vertical surface of the side enclosure 7.5. There are several fixing blocks 7.7 with internal threaded holes on the flanging of the side enclosure 7.5. The air inlet flange 4.1 is in the shape of a disk with a smaller upper part and a larger lower part. An air inlet seal ring 4.3 is installed on the upper part, and an air inlet shock pad 4.2 is installed on the lower part. After the fan 4 is installed, the upper surface of the fixing block 7.7 and the upper surface of the air inlet shock pad 4.2 are on the same plane. The top plate 7.9 is opened with a hole to avoid the air inlet flange 4.1 and the top plate sound-absorbing cotton 7.8 is pasted on the bottom surface. After removing the part of the sound-absorbing cotton material that interferes with the fixing block 7.7, the top plate is horizontally fixed on the fixing block 7.7 and the air inlet shock pad 4.2.

[0025] AsFigure 5 As shown in the figure, in order to allow the fan 4 to enter the interior of the side enclosure 7.5, a rectangular notch is provided in the side enclosure 7.5 at the outlet pipe of the fan 4. Positioning bolts 7.13 are welded to both sides of the notch and extend outward. A lower sealing strip 7.11 is installed at the lower end of the notch. After the fan 4 is installed on the frame 3, the lower sealing strip 7.11 is pressed by the outlet pipe. The sealing frame 7.10 has a notch and has flanges like the side enclosure 7.5, and there are fixing blocks 7.7 on the flanges. An upper sealing strip 7.12 is installed in the notch of the sealing frame 7.10. The sealing frame is installed on the outlet pipe of the fan 4 through the positioning bolts 7.13, and the upper sealing strip 7.12 and the lower sealing strip 7.11 seal the periphery of the outlet pipe of the fan 4.

[0026] In summary, through the fan fixing assembly 7, the main body of the fan housing is flexibly installed in a closed space with sound-absorbing cotton pasted inside, reducing the noise and vibration during the operation of the fan 4.

[0027] As Figure 1 、 3 shown, the second muffler 9 is fixed to the frame 3 through the transition bracket one 13 and the rubber shock pad one 14, and the third muffler 10 is fixed to the water tank chassis 2 and the subframe 11 through the transition bracket two 15 and the rubber shock pad two 16, thereby reducing the vibration of the muffler pipeline.

[0028] The cross-sections of the channels of the first muffler 8, the second muffler 9, and the third muffler 10 are rectangular. To achieve better noise reduction effects and reduce wind resistance, the channel area of the first muffler 8 > the channel area of the second muffler 8 or the channel area of the third muffler 9 > the outlet area of the fan 4.

[0029] As Figure 3 shown, the appearance of the second muffler 9 shows a Z-shaped trend, guiding the air outlet direction from the upper side to the middle bottom, and the third muffler guides the air outlet to the rear of the vehicle.

[0030] Since the first muffler 8 is installed on the upper frame 3 with sufficient installation space, the first muffler can be made larger. Combining with the second and third mufflers, the total volume and length of the mufflers exceed those of ordinary sanitation vehicles, thus having better noise reduction effects.

[0031] As Figure 2 、 3 shown, the inner surface of the front cover 12.4 is pasted with cover sound-absorbing cotton 12.5 to further prevent noise from spreading to the outside.

[0032] The above are only the preferred embodiments of the present utility model, and are not intended to limit the present utility model in other forms. Any person skilled in the relevant art may use the technical content disclosed above to make changes or modifications into equivalent embodiments with equivalent changes. However, any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present utility model without departing from the technical solution content of the present utility model still fall within the protection scope of the technical solution of the present utility model.

Claims

1. A noise reduction structure for the fan system of an electric sanitation vehicle, characterized in that, Including: Front water tank, water tank chassis, frame, fan, first muffler, second muffler, third muffler, garbage bin; the front water tank is fixed on the water tank chassis, the frame is arranged on the water tank chassis, and the fan is installed on the fan fixing assembly; one end of the frame is fixed on the front water tank and the other end is fixed on the frame; the frame bears the fan fixing assembly; the air inlet of the fan faces upward of the sanitation vehicle; the garbage bin is installed on the sub-frame of the sanitation vehicle, and the garbage bin includes a garbage suction cylinder, a filter screen, a suction port, and a front cover shell. The suction port is flange-connected to the air inlet of the fan. The first muffler is fixed on the frame, and the air outlet of the fan is sequentially connected to the first muffler, the second muffler, and the third muffler; both the water tank chassis and the sub-frame are installed on the chassis of the sanitation vehicle.

2. The noise reduction structure of the fan system of the electric sanitation vehicle according to claim 1, characterized in that: A notch is opened at the rear of the front water tank to accommodate the frame.

3. The noise reduction structure of the fan system of the electric sanitation vehicle according to claim 1, wherein: The fan fixing assembly includes a bottom plate, bottom sound-absorbing cotton, fan shock pads, side enclosures, side sound-absorbing cotton, fixing blocks, top plate sound-absorbing cotton, and a top plate; several fan shock pads are installed on the frame, the bottom plate is fixed on the frame, the bottom sound-absorbing cotton is pasted on the upper surface of the bottom plate, and there are several fan fixing lugs on the fan. The fixing lugs correspond to the fan shock pads one by one; the side enclosures are installed on the frame and enclose the periphery of the fan, and the side sound-absorbing cotton is pasted inside the side enclosures; there are several fixing blocks on the upper surface of the side enclosures. The air inlet flange of the fan is in a shape that is smaller at the top and larger at the bottom. The upper part of the air inlet flange of the fan has an air inlet sealing ring and is connected to the suction port, and an air inlet shock pad is installed at the lower part; the upper surfaces of the fixing blocks and the air inlet shock pad are on the same plane. The bottom surface of the top plate is pasted with top plate sound-absorbing cotton, and the top plate is flatly fixed on the fixing blocks and the air inlet shock pad.

4. The noise reduction structure of the fan system of the electric sanitation vehicle according to claim 3, characterized in that: The side enclosures are provided with notches at the air outlet of the fan. Positioning bolts are welded outward on both sides of the notches, and a lower sealing strip is installed at the lower end of the notches. The fan fixing assembly further includes a sealing frame. The sealing frame is installed in the notch through the positioning bolts. The sealing frame is installed with an upper sealing strip for clamping the air outlet pipe of the fan. The sealing frame and the side enclosures have the same flanging, and the fixing blocks are arranged on the flanging.

5. The noise reduction structure of the fan system of the electric sanitation vehicle according to claim 1, characterized in that: The second muffler is fixed on the frame through a first transition bracket and a first rubber shock pad; the third muffler is fixed on the water tank chassis and the sub-frame through a second transition bracket and a second rubber shock pad.

6. The noise reduction structure of the fan system of the electric sanitation vehicle according to claim 5, wherein: The appearance of the second muffler is Z-shaped, and the air outlet direction of the third muffler faces the rear of the sanitation vehicle.

7. The sound reduction structure of the fan system of the electric sanitation vehicle according to claim 6, characterized in that: The channel area of the first muffler is larger than that of the second or third muffler; the channel area of the second or third muffler is larger than the air outlet area of the fan.

8. The noise reduction structure of the fan system of the electric sanitation vehicle according to claim 1, wherein: The inner surface of the front cover shell is pasted with cover shell sound-absorbing cotton.

9. The noise reduction structure of the fan system of the electric sanitation vehicle according to claim 1, wherein: There are threaded blocks on the fan for the installation and lifting of the fan.

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